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GIGSA NEWSLETTER AUGUST 2018
Newsletter
August 2018
The South African Chapter of the International Geosynthetics´Society (IGS)
Establishedin1994 and dedicated to the Scientific and Engineering Developement of Geosynthetics and Associated Technologies.
A newsletter of the Geosynthetics Interest Group of South Africa (GIGSA) in Association with the South African Institute of Civil Engineering (SAICE)
Even
ts
Featu
res
THE BENEFACTORS
WHAT HAPPENED AT GIGSA EDUCATION WEEK?
Inte
llig
en
ce
PREZ SEZ! “I have only 2 words, THANK YOU!”
Photo Competition 2018
GIGSA NEWSLETTER AUGUST 2018 2
THE FUTURE IS HERE
T eamwork is the key to success. I have
been a strong believer in this in sport sin-
ce my youth, and I am even more convin-
ced following the outstanding success of
the geosynthetics week, EtE, workshop and GCYP.
No one person could have done it on their own,
and I was grateful to be part of this amazing team
who spent an incredible number of hours in the
most impossible time during our daily routines of
work and family. I have only 2 words, THANK
YOU!
I don’t want to spoil the feedback, but I was ama-
zed to see our South African professors taking part
in one of the most iconic event IGS has ever deve-
loped. I had the good fortune afterwards to receive
the congratulations from many professors who ha-
ve been exposed to the memorable history of ge-
osynthetics, realizing that there is more than just a
product but rather a whole new horizon of soluti-
ons. Thank you to Prof. Tim Stark and Prof. Martin
Ziegler for your time and sharing your knowledge
and experience with us.
GIGSA, as remote chapter compared to others, is
recognised within IGS for always raising the bar.
Well we did it again! The GCYP was the first con-
ference of its kind organized by an IGS Chapter (as
far as I know) and was another huge success, follo-
wing the EtE and the workshops. I took part in a
few of the sessions and I was amazed to see the
passion of the young professionals, taking pride in
their work, presentations, engaging with fellow
colleagues, sharing ideas, and enjoying the great
atmosphere. What young professionals need is
guidance. Here in South Africa I hear much about
lack of guidance from peers, and generally getting
lost in the system. I must however contradict those
who say this regarding the geosynthetics field. We
have peers who are passionate about the South
African youth who interrupted their work schedules,
deadlines and travels to attend the GCYP and be a
point of reference to our young professionals, sha-
ring their experience and giving guidance and just
spontaneously giving to the geosynthetics commu-
nity. Thank you Peter Legg and Kelvin Legge.
GCYP and EtE are the events which have laid the
foundation for a new venture, the venture of the
youth in South Africa. I might be making an overs-
tatement, but I want to believe that what we have
achieved is going to have the same impact as Geo-
Africa 2009, which we still feel today almost 10
years down the line. I spend time with students,
trying to assist them to find their way, from a simple
question to the most complicated and articulated
master thesis. Each time I engage with them I am
overwhelmed by their passion for their future, and
we at GIGSA must embrace this passion and deve-
lop it into something tangible for the future generati-
ons of geosynthetics professionals.
It is just the beginning … watch this space over the next few years.
Yours Sincerely
Edoardo
Pres Sez
GIGSA NEWSLETTER AUGUST 2018 3
Feature: Benefactor
Nadia Minnaar
TRI Africa Environmental Services (Pty) Ltd.
Minnaarsplaas #4
Cullinan
1000
South Africa
Phone: +27 79 875 5691
TRI is very pleased to announce the establishment of TRI Africa Environmental Services Pty. Ltd. (TRI Africa) head-quartered in Johannesburg, South Africa. TRI is a global independent third party geosynthetics / geotechnical testing and research company with operating service centres in the United States, Brazil, China, Australia and India. TRI’s test centres provide services that include routine conformance / verification testing services, interaction and transpor-tation related research, leak location and related field services, manufacturing auditing, forensic investigations as well as sponsored geosynthetic R&D supported by government and industry. TRI has successfully supported geosynthetic testing projects for many years throughout the African continent and has looked forward to expanding support to African clients with field services. Sam Allen, Director of TRI ’s global operati-ons, explains “TRI has benefitted substantially from our relationships with the African engineering and installation communities. Our mutual growth has taught TRI that there is much to learn from the African experience, and we look forward to contributing directly to the African goals of environmental protection and sustainable development. In this context, it was important to establish TRI Africa in the same culture as all other TRI locations. That is, TRI-Africa is unassociated with any engineering, consulting, manufacturing or construction company so that we may work in non-competitive concert with all industry participants”. TRI-Africa will be lead by Ms. Nadia Minnaar formerly of NGQ Consulting. Nadia has performed field construction re-lated quality assurance for a variety of mining, waste containment and water management facilities and will bring this experience to clients throughout Africa. More recently she has worked with TRI’s Director of Electrical Lining Surveys, Ms. Abigail Gilson, P.E., to become a qualified electrical leak location surveyor using TRI’s proprietary leak location equipment. TRI’s recent evolution of leak location equipment has been developed over the last decade and is superi-or in the accurate and documented recording of lining system leaks. “The TRI Series 3000 equipment affords rapid surveying with GPS mapping of electrical current, facilitating exact location of detected defects. TRI is employing the absolute best leak survey equipment in Africa.” explains Nadia. Ms. Minnaar is also intimately familiar with the up-to date ASTM International standards governing electrical leak surveys and will ensure that the new and more rigorous requirements of the relevant standards are enforced and achieved on all TRI electrical leak location projects. TRI Africa provides independent, third-party CQA field support for compacted clay and geosynthetic installations, in-cluding electrical leak location surveys via spark testing, water puddle testing, and dipole and double dipole testing including GPS-based electrical mapping. TRI Africa also provides geosynthetic-related consulting in regards to manu-facturing quality, geosynthetic quality programs and implementation of manufacturing and field quality regimens. TRI Africa is immediately supported by TRI’s global team of geosynthetic specialists to bring expanded services to Africa.
Phone: +27 79 875 5691, E-mail: [email protected]
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GIGSA NEWSLETTER AUGUST 2018 4
SUCCESSFUL GEOSYNTHETIC INSTALLATION
Feature: Benefactor
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. An interesting discussion point between cus-tomers, consulting engineers, installers,
earthwork contractors and manufacturers is usual-ly the successful installation of geosynthetic sys-tems. Naturally there is also, in most cases, a huge difference in opinions and it is found that in some cases the customers are still not convinced about the benefits and successes of geosynthetic installations. This difference in opinions is normally argued from very different angles, but the end-users are, in many cases, misinformed or have had bad experi-ence during an installation process. The successful installation of geosynthetics, like all other materi-al, can be influenced by so many factors during the installation process, that it is normally quite difficult to determine precisely why it was succes-sful or not. If one looks at the overall picture of the installati-on process it is important to realize that this is just another project that must be managed care-fully to ensure all detail is available to all the par-ties involved at all times, and that the project can only be successful if all the parties are working together as a team. It has been proven over many years that the most successful projects are those that were managed under strict process controlled conditions, with well-informed teams and good teamwork.
A large part of the responsibility for successful projects depends on good communication between the team and the project management ,as well as how well informed the project management is at all times. In order to achieve this, over many years of development, it was realized that the best way for the project management team or manager to control and manage the project is to have a proper quality assurance and quality con-trol plan implemented on the project, as well as an independent representative on the project that can act as an independent 3rd party on manage-ment’s behalf, and who has no obligation to anyo-ne but management to ensure that all processes are under control at all times, without being influ-enced by any single one of the parties involved with the installation. The independent 3rd party company can serve different purposes during installation and act on behalf of the owner, the design engineer or the earthworks contractor since the installer is usually a sub-contractor to the earthworks contractor. The independent 3rd party company will therefore be responsible for the quality assurance of the ge-osynthetic installation, and can also play a vital role in different stages of a project e.g. they can be involved when the project specification is com-piled prior to tender stage, can be involved during tender stage to assess the quality assurance and control processes of the installer, and to be a communication channel between all the parties during construction namely the customer, engine-er, earthworks contractor and installer. assurance part of the project is a process orienta-ted exercise e.g. ensuring the installation of good
GIGSA NEWSLETTER AUGUST 2018 5
Feature: Benefactor
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The quality assurance part of the project is a pro-cess orientated exercise e.g. ensuring the installa-tion of good quality geosynthetic material in line with the SANS 10409 national standard, manufac-turers’ installation instructions, industry best prac-tice and pre-determined project specifications. Quality control is a product orientated exercise and includes all the testing that must be carried out by the installer to ensure the quality of the seaming installation is correct, but also forms a part of the quality assurance plan of the project. It is a well known fact that if a leak occurs in the geosynthetic liner system it is usually due to other external factors and very rarely as a result of bad quality material, but rather due to project specifi-cations and industry best practices not being follo-wed, material handling and the process of placing cover material over the installed liner. This is why it is so critical to have a totally independent per-son on the project to ensure the pre-determined processes are well implemented and executed, to prevent material damage of any sort or if there is damage to material during the installation pro-cess, to report on it in order to fix the problem immediately and to mitigate preventive actions to ensure damage is limited.
TRI Africa Environmental Services (Pty) Ltd is such an independent 3rd party company who spe-cialises in quality assurance. They have vast expe-rience in the geosynthetic installation processes with a state of the art software programme to co-capture quality control information and to provide the customer with a detailed project pack after completion. The question is often asked if it is possible to build a facility with a zero leak rate and the answer is “yes, it is possible to build a facility with a zero leak rate”, BUT, the secret to the success of such a project has been determined to be the imple-mentation of thorough quality assurance as well as independent representation on the project.
GIGSA NEWSLETTER AUGUST 2018 6
Feature: Benefactor
THE CONSTRUCTION OF THE VISSERSHOK WMF CELL 5A
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The City of Cape Town is currently facing substantial challenges, which are certainly not limited to the severest drought experienced in a 100 years. Apart from the drought condi-tions, which have been widely publicised, the City is in dire need of extended landfill capac-ity.
There has been a recent shift internationally to sustainable alternative waste treatment technologies and the “zero waste to landfill” movements are certainly gaining momentum. However while these technologies are being developed, ‘Joe Industry’ and ‘Joe Suburb’ are still in the process of consuming and thus generating waste as we have done since the inception of the modern age. This in turn leads to the absolute necessity of Landfilling and the associated sciences of engineering, extending and maintaining these complex struc-tures.
The Vissershok Waste Management Facility is located approximately 20km north of Cape Town CBD along the N7 freeway. The Brick & Clay brickmaking factory is to the east; FFS oil refinery further east and the City of Cape Town Vissershok Landfill Site (Class A) to the south east. The Vissershok Waste Management (VHWMF) is a, privately owned, joint venture between Enviroserv Waste Management and Averda SA, who accept this social responsibility of facilitating responsible waste management.
The latest phase of construction is currently in progress with a completion date estimated towards October 2018. What sets this project apart from previous landfill cells at this facility is the inclusion of Electronic Leak Detection Surveying, after placement of the overlying layers over the primary and secondary geomembranes, as part of the Quality Control procedures implemented on site. The design also includes liner temperature monitoring as well as strain monitoring of the geosynthetic reinforcing grids used for veneer stability and base reinforcement on the piggyback slope.
The Project team consists of the following companies:
Client: Vissershok Waste Management Facility Lining/Geosynthetics Installer: Engineered Linings (Pty) Ltd
Consulting Engineer: JPCE (Pty) Ltd Electronic Leak Survey Consultant: NGQ Consulting (Pty) Ltd
Civil Contractor: Martin & East (Pty) Ltd CQA Consultants: JPCE (Pty) Ltd & NGQ Consulting (Pty) Ltd
The Design Methodology
The layerworks design includes three areas; (1) 1:3 slopes on in-situ material, (2) floor of the cell and (3) the piggyback slope of
Cell 1. For ease of reference we have included below the layerworks items as part of the design, which lists all items over the
three areas. Please note the below is not indicative of the entire cell layerworks.
The Three Areas - 1:3 Slopes on in-situ material / Cell Floor / Piggyback Section :
• Class 2 GRI-GT13 non-woven separation geotextile (continuous filament, needle punched, polyester geotextile were used for this application)
• 300mm leachate drainage with 53mm washed crushed stone (200mm on slopes)
• 200/40 reinforcing grid on longer slopes as veneer reinforcement
• 1500g/m² GRI-GT12 non-woven protection geotextile on the slopes and 200mm clean sand on the floor areas (polyester, staple fibre, needle
punched geotextile were used for this application)
• 2mm HDPE mono-textured geomembrane as primary liner (texturing facing down, flat dye manufacturing with embossed texturing)
• 4 x 150mm compacted clay layers from on-site sources compacted to 100% Proctor (98% for Piggyback Slope) at moisture content of OMC to
OMC +3%
• 40/40 reinforcing grid as base reinforcement on Piggyback Slope
• Class 2 GRI-GT13 non-woven separation geotextile (continuous filament, needle punched, polyester geotextile were used for this application)
• 150mm thick leachate leakage collection and gas drainage (on Piggyback Slope) layer with 19mm washed crushed stone
• 200/40 reinforcing grid on longer slopes as veneer reinforcement
• 1500g/m² GRI-GT12 non-woven protection geotextile (polyester, staple fibre, needle punched geotextile were used for this application)
• 1,5mm HDPE double-textured geomembrane as secondary liner, excluding Piggyback slopes (flat dye manufacturing with embossed texturing)
• 1 x 200mm compacted clay layers from on-site sources compacted to 100% Proctor at moisture content of OMC to OMC +3%, excluding piggy-
back slopes
• Rip and re-compact in-situ material to same specifications as the clay layers, excluding piggyback slopes
• Levelling layer with sand compacted to 95% Mod Aashto on the Piggyback Slope
• Compacted waste (Piggyback Slope)
GIGSA NEWSLETTER AUGUST 2018 7
Feature: Benefactor
The Construction Process Phase 1 – Bulk Earthworks
The bulk earthworks portion of this project was done as a separate contract prior to
the rainy season. This contract involved the shaping of the footprint of the new cell
prior to the construction of the new barrier
systems.
Bulk earthworks in preparation for the civil
Layerworks construction
Phase 2 – Cell Construction & Surface
Preparation
Surface preparation was crucially important
prior to the Geosynthetic Lining being de-
ployed. The aim was to promote intimate
contact between the textured lining system
and the clay subgrade. This subgrade
preparation specification addressed vari-
ous items such as contact, finish and com-
paction.
Clay subgrade surface preparation prior to liner deployment
done by the Main Contractor
Phase 3 – Geosynthetic Lining Installation
Textured High Density Polyethylene (HDPE)
geomembranes are in the process of being in-
stalled onto the prepared surface. The lining is
carefully installed down the slopes to avoid dam-
age to both the subgrade as well as the lining
system itself. Prior to the lining being deployed a
sacrificial strip of smooth lining is rolled out to
avoid damage (from the texturing) and dehydra-
tion of the subgrade. The textured geomem-
brane is installed and welded in place over this
sacrificial strip, which is removed once the lining
is welded and QC tested.
The lining sheets are welded together by means
of double hot wedge welding and stringent quali-
ty control procedures are adopted by the lining
contractor, in conjunction with the construction
quality assurance consultant, to confirm the in-
tegrity of all the welds. Engineered Linings in-
stalls all lining products strictly according to the
SANS 10409 and SANS 1526, as well as project
specific specifications.
The Geomembrane is deployed on top of a
sacrificial strip of lining to avoid damage to
underlying clay surface due to texturing
under liner
Trial welds
prior to liner
welding as
part of QC
testing
Liner installed and welded on
Piggyback Slope
Phase 4– Geogrids and Cover layers
Two different specification Geogrids are installed
as basal reinforcing below the 4 x 150mm com-
pacted clay layers on the Piggyback Slope and
as veneer reinforcement below the 200mm stone
leachate drainage layer on the longer slopes. The
geogrids are installed by the Lining Installer Con-
tractor and the placement of the layerworks over
the geogrids forms part of the
Civil Contractor’s scope for this
project scope.
Veneer reinforcement Geogrid into specifically
designed anchor trenches and 4 x 150mm compacted clay layers
being placed over the base reinforcement Geogrid on the Piggyback Slope.
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GIGSA NEWSLETTER AUGUST 2018 8
Feature: Benefactor
Phase 5–Drainage
The landfill cell design offers a number of drainage
mediums which provide two main functions. One
would be the leachate drainage layer on top of the
primary composite liner installed to avoid a leachate
head build-up on top of the liner. The other would be
a leachate leakage detection layer on the secondary
composite liner in order to monitor any leakage
through the primary composite liner. These draining
mediums consist of free draining, clean, single sized
stone layers. Solid wall HDPE pipes are drilled on site
and installed in these stone layers in a herring bone system. The leakage
detection layer gravitates into two separate monitoring sumps (one for the
Piggyback Slope and one for the rest of the footprint). The leachate collec-
tion layer on top of the primary composite liner gravitates into a Cast-in
Concrete Protection Liner (CCPL) HDPE lined pump sump. From this sump
the leachate is pumped to a dedicated storage area for collection.
Leakage detection layer on secondary
composite liner on cell floor
Gas venting and leachate leakage / seep-
age layer on separation geotextile on the
Piggyback Slope
Phase 6 – Final Stages yet to be completed
Over and above the independent 3rd party Construction Quality Assurance being done on the lining installation the project
specification also requires that an Electronic Leak detection survey be done once the overlying layers, over the primary and
secondary liners, have been completed. This would determine whether or not any mechanical damage occurred from the
placement of these layers over the liners.
Once the leachate collection layer on top of the primary liner has been completed it will be covered by a separation geotexti le
on the cell floor as well as one roll width along the toe of the slopes. The remainder of the slopes will be covered with this sep-
aration geotextile by the landfill operator as the cell is being loaded with waste. This is done to avoid any potential UV degrada-
tion of the geotextile due to prolonged UV exposure.
Interesting: Data on the actual operating conditions under which a landfill operates are extremely limited. This design includes
for various sensors to measure the geosynthetic material (geomembrane and geogrids) temperatures at various locations. This
data would provide valuable information regarding the actual temperatures within this cell. The design also includes equipment
to measure the strain on the geogrids during operation. Geogrids play a vital role in the slope stability of this operating landfill.
Conclusion:
As a result of responsible legislation; engineering; construction; geosynthetics installation and QC testing we are confident that
the end product will meet and exceed project expectations once completed. Barrier systems in landfills are nothing new to our
continent, however there is no substitute for engineering experience and innovation when the health of countless people are at
stake. All parties involved with this project respect these fair practices and look forward to the successful completion of this
VHWMF Engineered Landfill cell.
A special thanks to Mr Wihan Visser from JPCE (Pty) Ltd for his
assistance with this article.
For more information on this project please feel free to contact:
Engineered Linings
Paul Roux
[email protected] or www.englining.co.za
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GIGSA NEWSLETTER AUGUST 2018 9
Past Events: GIGSA Education Week
The Geosynthetic Interest Group of South Africa
(GIGSA), the South African Chapter of the IGS, hos-
ted a successful Education Week from the 2nd to the
6th July 2018.
The week commenced with a very successful
“Educate the Educator” (EtE) two day event at Irene
Country Lodge in Gauteng. 18 academics from 12
institutions attended. Day 1 was enthusiastically pre-
sented by Professor Timothy D. Stark of the Univer-
sity of Illinois at Urbana-Champaign. He not only in-
troduced geosynthetics and covered geosynthetic
barriers and other topics, but also shared numerous
practical ideas on including geosynthetics in existing
tertiary engineering courses.
Professor Martin Ziegler of RWTH Aachen University
covered reinforcement. A welding demonstration
and local case studies rounded off the event.
The EtE was well received and lead to lively discus-
sions about testing, funding, collaboration and more.
We look forward to reaping the benefits of many mo-
re civil engineering students to the use of geosy-
nthetics as a result of this valuable event. GIGSA
would like to thank the IGS for their sponsorship of
the international speakers’ travel.
The middle of the week was a highlight for many.
Two parallel one day workshops were presented.
Professor Stark presented on the stability of geosy-
nthetic-lined sites. This was an excellent master-
class for the 60 attendees, many of whom were ke-
en to hear more. Professor Ziegler presented on
Fundamentals of Soil Reinforcement to 28 atten-
dees, and GIGSA President Edoardo Zannoni roun-
ded off that workshop with a presentation on a South
African perspective: SANS 8006 - design, SANS
54475 - construction and National Annex SANS 207.
The inaugural Geosynthetic Conference for Young
Professionals (GCYP) followed on the 5th and 6th of
July 2018. This was attended by 32 delegates, with
21 presentations, 7 exhibitions, and included a wel-
ding demonstration and practicals as well as social
activities. As a first event, the GCYP went well, with
many great suggestions made for further GCYP
events.
Thank you to Professors Stark and Ziegler for dona-
ting of their time and sharing their expertise so willin-
gly. Thank you to all those who attended and made
the event worthwhile.
Thank you very much to the GIGSA team who made the Education Week possible, including Johann le Roux, Edoardo Zannoni, Florian Hoertkorn, Riva Nortje and Yolande van den Berg.
GIGSA NEWSLETTER AUGUST 2018 10
Past Events: EtE
2-3
July2018
Day 1 and 2 :
The official kick-off of the GIGSA Education week began with the Educate the
Educator workshops. The courses were presented by , Professor Timothy D.
Stark and Professor Martin Ziegler. The presenters shared practicle examples
from industry as this is the best way to show the need for geosyntehtics in eve-
ryday engineering. Feedback from these courses are very helpful for us at
GIGSA so here are some numbers for you to crunch!
that’s the number of academics that had attended 18
that’s the number of institutions that they hailed from 12
Said that the ETE had met their expectations
Some Chirps!
“Very valuable updater and upgrader
on the knowledge base “
“Well prepared/organized. Relevant
content. “
100%
Thanks You For Attending
Some Chirps!
“Excellent presentations. Thanks to
GIGSA for organizing the event. “
Irene
Country
Lodge
GIGSA NEWSLETTER AUGUST 2018 11
Past Events: Workshops
On the 4th of July, GIGSA proudly hosted a day of workshops at the Bytes Conference Centre in Midrand, Johannesburg. A total of 75 delegates attended two workshops with the presence of 8 exhibitors. The bubbles (on page 13) show some of the comments from delegates.
The workshops were run parallel, by internationally recognized experts in the field:
Stability of Geosynthetic Lined Sites presented by Professor Timothy Stark, attended by 60 delegates, and
Fundamentals of Soil Reinforcements presented by Professor Martin Ziegler, attended by 28 delegates.
Details regarding the workshop, the presenters and contents are discussed below:
Stability of Geosynthetic Lined Sites
With increased requirements in South Africa for the lining of sites using
geosynthetics in composite containment systems, environmental protec-
tion is increased while stability requires careful consideration. A number
of stability failures have occurred in South Africa at geosynthetic land
sites as noted in the keynote address at Landfill 2017.
Professor Timothy Stark from the University of Illinois at Urbana-
Champaign, a world-renowned expert in the field, presented this
workshop which was primarily aimed at designers of sites with geosy-
nthetic lining components, including landfills, tailings dams, ash mana-
gement faculties and coal stockyards. Chaired by GIGSA Past Presi-
dent, Riva Nortje, the outline of this workshop included:
• Introduction to Slope Stability Concepts and Failures;
• Geosynthetic Interface and Internal Shear Testing;
• Design Interface Strengths;
• Specifying Geosynthetic Interface Shear Strengths;
• Slope Stability Analyses: Static and Seismic, Factor of Safety,
and Probability of Failure;
• Slope Monitoring;
• Effect of Elevated Temperatures on Slopes.
GIGSA NEWSLETTER AUGUST 2018 12
Past Events: Workshops
Fundamentals of Soil Reinforcements
P rofessor Dr.-Ing. Martin Ziegler, current Head of Geotechnical De-
partment at University of Aachen (RWTH) Germany, presented
fundamentals with regards to design and analysis of earth struc-
tures using geosynthetic reinforcements. The topics covered included em-
bankments on soft soil or geosynthetic encased columns, as described in
the “Recommendations for Design and Analysis of Earth Structures using
Geosynthetic Reinforcements – EBGEO”, published by the German Geo-
technical Society. The EBGEO is compatible with and based on the limit
state design as described in the Eurocode.
The workshop showed different applications with geogrids and how geosynthetic reinforcements work in
soil. Following and introduction to the EBGEO rules and regulations, various examples for typical applicati-
ons were presented.
Rounding off the presentation was current GIGSA President, Edoardo Zannoni, chair of the SABS TC98
SC06 WG2 in charge of revising the South African soil reinforcement code SANS 207, giving a South Afri-
can perspective on the design and construction of soil reinforcement structures (SANS 8006 – Code of
practice for strengthened/reinforced soils and other fills and SANS 54475 – Execution of special geotechni-
cal works – reinforced fill) and highlighted the upcoming SANS 207 as a national standard to address local
issues which are not covered in international standards.
The topic of the programme included:
• Functioning of geogrids;
• Presentation of EBGEO;
• Design aspects and examples of
Retaining Walls and Slopes;
Reinforced Base Course;
Embankment on soft soils;
MSE Wall structures;
Over linear bearing elements.
• SANS 8006 – Design;
• SANS 54475 – Construction and National Annex SANS 207.
The EBGEO as discussed during the workshop provided useful
inside in the limit state design philosophy and could not have
come at a better time as South Africa recently has selected to
adopt the limit state design concept.
GIGSA NEWSLETTER AUGUST 2018 13
Past Events: Workshops
GIGSA would like to acknowledge and thank you for
the following contributions:
• Timothy Stark and Martin Ziegler for making
themselves available to prepare and present the
lectures.
• the GIGSA members who helped organize this
event
• the Benefactors and Exhibitors who added value.
• and Yolande van den Berg from Selah production,
who managed the whole event. Nevertheless, the
event would have been meaningless without all
the participants.
Finally, GIGSA would like to thank all of the partici-
pants who attended.
Have a look at the speech notes for some of the feed-
back from attendees.
Lecture was incredible.
Very insightful course.
Great presenter with
enormous amount of in-
sight on the topic, would
highly recommend.
Thank you GIGSA
for a great course.
Excellent orga-
nization.
GIGSA NEWSLETTER AUGUST 2018 14
Past Events: GCYP
Day 4 and 5:
The inaugural Geosynthetics Conference for Young Professionals closed off
the GIGSA education week with more than relevant information for the young
generation to use in this ever-growing industry. Johnny Oriokot lead the tech-
nical committee to a very successful conference. The conference was not a
competition but respect must be paid to those that went the extra mile in show-
casing their talent. Here’s some winners that the committee had chosen;
5-6
July2018
The gcYp best paper award was presented to Olerato
Masongwa of Maccaferri Africa.
Olerato's paper was based on the Lanseria International
Airport expansion project, and the completion of the first
true abutment reinforced with a polymeric geosynthetic
linking the main terminal to the newly erected parking
structure.
This project highlighted the abilities of using geosynthetics
in critical applications, and advancement from the con-
ventional construction methods.
The title of the paper is "From false abutment to true
abutment using MSEW with polymeric reinforcement:
the Lanseria International Airport".
Best Paper
Best Presentation The gcYp best presentation award was presented to Christopher
O'Donovan of Jones & Wagener.
Christopher's presentation, and paper, was based on a project that
showcased the successful and innovative use of specialised founda-
tion construction equipment coupled with geotextile fabric to con-
struct a secant pile wall as a continuous groundwater cut-off cur-
tain drain.
The conventional graded filter could not be implemented from
surface and thus a method using pre-fabricated geotextile socks,
sequentially installed into 1050mm diameter secant pile holes was
devised. The geotextile socks ensured the long-term separation of
the drainage medium from the in-situ soils. This method allowed
the construction of the continuous groundwater cut-off to be com-
pleted safely from above surface, within the limited site space
available while adhering to time and budget requirements.
The title of the paper is "A Case Study on the Design and Con-
struction of a Groundwater Cut-off Structure Using Secant Piling
Techniques and Geosynthetics".
GIGSA NEWSLETTER AUGUST 2018 15
Upcoming Events
14 Oct 2018: Exhibition setup
15 Oct 2018 : Golf Day and Opening Cocktail
16 - 18 Oct 2018 : Conference Days
15 - 18 Oct 2018 : Exhibition Days
19 Oct 2018 : Technical Tour
The waste management hierarchy emphasises the follo-wing key elements and will serve as topics for the confe-rence:
Are you reducing your waste footprint?? • Waste avoidance and reduction;
• Recycle;
• Recovery;
• Treatment and disposal.
Plenary sessions, presentations and parallel workshops will be conducted by the leaders in the respective fields over a period of three days from 16 to 18 October 2018. These sessions will provide an overview as well as an in-depth description of the developments, research, innovations and technologies.
One of the keynote addresses will be on "Challenging Changes Connecting Waste hierarchy and Circular economy" by Ad Lansink (author of the The Ladder of Lansink). Plenary sessions will focus on behaviour, beneficiation, cost of compliance, circular economy, and case studies. Various workshops will also be hosted on Wednesday 17 October 2018, details will be published on the website soon. www.wastecon.co.za
The highlight of the conference will be a technical tour set to take place on the last day of the conference. The details of this exciting tour will be revealed at a later stage so watch this space and make sure that you book your seat in advance as space is limited.
GIGSA NEWSLETTER AUGUST 2018 16
6th International Mining and Industrial Waste Mana-
gement Conference
The SAICE Geotechnical Division’s
Tailings Sub-Committee are
pleased to present:
// About the Conference
The South African Institution of Civil Engineering (SAICE) Geotechnical Division’s Tailings Sub-Committee is pleased to announce
the 6th International Mining and Industrial Waste Management Conference to be held from 29 – 31 October 2018 at Legend
Golf and Safari Resort, Haakdoring Road, Sterkrivier District, Limpopo.
The conference will be structured to cover the full life cycle of a typical residue disposal facility, within the broad categories of
Site Selection, Investigation, Design, Construction, Operation and Closure.
// Who Should Attend?
It is anticipated that the conference will provide a comprehensive overview of the latest developments and trends in the de-
sign, operation and closure of disposal facilities for mining and industrial waste, both locally and internationally. The conference
is likely to attract a significant number of papers dealing with new mining developments on the African continent and should
provide invaluable information in this regard.
The Organising Committee is currently in discussion with a number of international experts in the field of mine and industrial
waste management with the view of bringing out at least one international guest speaker to the conference. Details of the
guest speaker will be communicated once arrangements have been finalised.
As in the past, it is anticipated that the conference will provide a good balance between theory and practical aspects, and will
benefit a wide spectrum of those involved in waste management, including regulators, facility owners, metallurgists, envi-
ronmental scientists, engineers and operators.
// Conference Secretariat
Selah Productions // Yolandé van den Berg // +27 (0)82 323 3910 // [email protected]
Upcoming Events
GIGSA NEWSLETTER AUGUST 2018 17
Task Force: Elections 2018
Dear GIGSA Members
The term of office for the current GIGSA committee ends at the AGM, scheduled for the 14th November 2018.
In terms of the Constitution we call for nominations for 10 new Committee members. All GIGSA members (those falling into the categories: Benefactor and Individual Members) are requested to send in their nomi-nations as soon as possible before the 14th of September 2018. The nomination form MUST be signed by the nominator and the nominee. All signatories must be paid up GIGSA members.
If more than 10 nominations are received, an electronic ballot will be held in October 2018. The portfolios of the elected members will be decided on at the first meeting of the new GIGSA Committee.
Please send the completed nomination form and personal information form for the attention of the Past-President of the GIGSA – Mrs Riva Nortjé to e-mail address [email protected].
Proposed Amendments to the GIGSA Constitution
Please note that there will be a call for the amendment of the GIGSA Constitution. An email shall be sent to all GIGSA members of this notifi-cation along with the proposed amendments.
GIGSA NEWSLETTER AUGUST 2018 18
Task Force: Photo Competition
Submission Closing date for the Photo Contest is Friday 5TH OCTOBER 2018
The GIGSA 2018 Photo Contest is open to all members of GIGSA. All entries should include a photo title, description and photo credit. An adhoc committee is formed by GIGSA committee members to award the best 10 photos reflecting the use of geosynthetics. These will be showcased and recognized on the GIGSA website and in newsletters. Please visit the GIGSA website (www.gigsa.org) for more information as well as to find the detailed list of the recipients of previous awards. Entries can be submitted to [email protected] with a subject of photo competition and your full de-tails (name,cell,etc.).
Prize will be as follow: 1st Place – R 1000,00 2nd Place – R 500,00 3rd Place – R 250,00
Rules and Guidelines of the Photo Contest is listed below:
1. Photos should clearly display a geosynthetic material / technology in use.
2. Photos should provide a clear understanding of what geosynthetic technology or event is being demons-trated.
3. Contestant must be a GIGSA member in good standing.
4. Each individual member of GIGSA and / or Benefactor Member Representative may submit up to 5 pho-tographs each. Each Benefactor Company may also submit up to 5 photographs each.
5. A title, description, and photo credit are required for each photo.
6. The file size should be a minimum of 4MB and a maximum of 15MB per picture.
7. File format must be .jpg.
8. Naming convention of the submitted .jpg should match or be similar to your photo title to avoid any con-fusion.
9. Photos should be sharp, well focused and aesthetically pleasing.
10. “Before and After” photo’s sets are welcome and count as one entry.
11. Final selection of First, Second, Third and Honourable Mention photos will be made by an independent committee.
For questions regarding the rules of the photo contest or other non-technical questions please contact Johann le Roux via email at [email protected]
GIGSA NEWSLETTER AUGUST 2018 19
Task Force: Bursary
1. INTRODUCTION
The GIGSA Bursary aims to support the growth of the appropriate knowledge of geosynthetics in South Africa.
2. TARGET GROUP
The GIGSA Bursary is open to Masters or PhD students studying at a South African University, who are conducting research in line with the Mission of GIGSA, which includes promoting the appropriate use of geosynthetics, advancing geosynthetics knowledge and developing new geosynthetic technologies. Applicants must be GIGSA members.
3. FUNDS
The GIGSA Bursary supports applicants financially in South African Rand (ZAR). Funds may be allocated to an appli-cant on a year to year basis, for a maximum period of three (3) years consecutively. The available bursary funds will be announced annually in February.
Funds may be used for tuition fees, travel, conferences, labour, consumables and specialist equipment relevant to the research topic.
Approval of applications and allocation of funds will be at the sole discretion of the GIGSA Bursary Committee. Fun-ding may not meet the applicant’s full funding requirements. Funding of existing GIGSA bursary students may take preference over new applicants, depending on the existing students’ progress.
Funds will be allocated quarterly in advance based on a quarterly forecast and detailed reconciliation including proof of expenditure. GIGSA reserves the right to terminate funding subject to progress compared to the project schedule and milestones.
Funds will preferably be transferred to a University account or will be paid against invoices signed by the University Supervisor.
4. APPLICATIONS
Applications should be submitted not later than the 30th of September each year for the following calendar year. Ap-plicants will be informed on the outcome of their applications by not later than 30th November of each year.
5. SUPPORTING DOCUMENTATION
Applications should comprise the following documentation:
1. Letter of application;
2. Topic of the research;
3. Scope of the research;
4. Letter of motivation by the proposed University Supervisor;
5. Overall budget forecast;
6. Proof of registration;
7. Project schedule and clear milestones;
8. Copy of ID or Passport;
9. Proof of residence;
10. Details of any other funding received or allocated to the student.
Should the student applying receive news of any other funding allocated to them following the submission of their ap-plication, GIGSA must be informed within one week.
GIGSA bursary applications should be e-mailed to [email protected] and copied to [email protected] by the end of business on the 30th September 2018.
6. RECIPIENT COMMITMENTS
In order to communicate the findings of the research conducted, the recipient is obligated to publish these in an ac-cepted journal and/or to present at a relevant conference or GIGSA event. In addition a short summary shall be pu-blished in the GIGSA newsletter.
The research project may not be specifically developed with the aim of providing commercial advantages to a specific product or company.
GIGSA NEWSLETTER AUGUST 2018 20
Task Force: Media and Membership
TASK FORCE: MEDIA
Social media is no longer just on the rise but a major way of staying in touch. It has now be-
come an everyday way of life. To better keep in contact with GIGSA or find out about future
events relating to the geosynthetic industry; try one of the following links below by clicking on your preferred social media platform. We may
not have many followers yet but we will get there in time with your help. Invite your friends
and colleagues as well. These social media plat-forms can be used as a forum for discussions pertaining to anything geosynthetic related.
Some tips for GIGSA’s social media platforms:
Tip #1: Place your questions or thoughts on any of
these platforms and you are likely to get a response be it from a supplier, consultant, contractor or someone just browsing the page.
Tip#2: Don’t be afraid to ask GIGSA questions as
well. If we can’t answer you then we can get someone that will be able to!
Tip #3: Keep it clean! Social media was invented
to keep in contact not grow apart; help maintain our level of professionalism by always being courteous!
Happy Clicking from the team at
GIGSA!
TASK FORCE: MEMBERSHIP
As of July 2018, the figures below show
the current status of the GIGSA
membership with a total of 226 members.
We currently stand at 30 Benefactors
and 4 Affiliated members.
SUMMARY OF MEMBERSHIP
Individualships covered by Affiliate status 4
Individualships covered by Benefactor status 60
Individuals 151
Honorary Members 11
Student Member 0
226 Total membership (persons)
Affiliate Members 4
Benefactors 30
GIGSA NEWSLETTER AUGUST 2018 21
Parent Society
IGS- Available Case Studies (20 August 2018)
• Securing Cavities Area by a very high Tensile Strength Geosynthetic Reinforcement;
• Roadway Reinforcement Applications;
• Hybrid Sheet Piling – Fiberglass Reinforced PVC Profiles;
• Kaytech Stabilises XtraSpace Storage Facility;
• Sunich Reinforced Green Slope Project (Iran);
• Nuevo Aeroporto Internation de la Ciu-dad de Mexico (NAICM) – Runway 3;
• Detention Pond under the Freeway Over-pass, Taichung, Taiwan (R.O.C.);
• Landfill drainage and enhanced cover soil interface, Silent Valley Landfill, Ebbw Vale, Wales, U.K.
12th Rencontres Géosynthétiques 2019 Nancy, France, 11 – 13 March 2019
The 12th French Speaking Conference on Geotextiles, Geomembranes and Related Products Organised by the French Chapter of IGS every two years since 1993, The Rencontres Géosynthétiques are the refe-rence French speaking event for geotexiles, geomembranes and related products. They cover the whole range of ap-plications of these materials in civil engineering and environmental protection. From the 11th to the 13th of March 2019 in Nancy (France), this conference will welcome experts, engineers and technicians coming from all Europe and northern Africa. The twelfth edition of the Rencontres Géosynthétiques will be the occasion to make a state of the art on recommendations of use and installation and standards, through the presentation of practical cases of use. The Rencontres Géosynthétiques will be a unique opportunity for practitioners to meet and exchange. On the first day, some short courses will be given (in French) to those attendees less familiar with geosynthetics on what geo-synthetics are, their basic properties and main uses in civil engineering and environmental protection. More information can be found in http://www.rencontresgeosynthetiques.org/index.html
Reported by Guillaume Stoltz, Assistant General Secretary of French Chapter of IGS
New Board of the Czech Chapter from left: Martin Vanicek ‐ head of technical group, Petr Hubik ‐ treasurer, Zikmund Rakowski ‐ president, Dalibor Grepl ‐ secretary
GIGSA NEWSLETTER AUGUST 2018 22
Sister Society
Apology from SAICE CEO, Manglin Pillay Pr Eng
re: Published “Out on a rib” article
Date: 10 August 2018
As the CEO of the South African Institution of Civil
Engineering (SAICE), I, Manglin Pillay, unreservedly
apologise for antagonising and offending so many
people with my article published in the July 2018 edition of Civil Engineering.
I humbly commit myself to taking counsel from fellow women engineers, other col-
leagues in the STEM fields and professionals in diversity training.
Manglin Pillay Pr Eng
SAICE CEO
SAICE APOLOGISES FOR CEO ARTICLE
Date: 8 August 2018
Following the press release that was issued on 2 August 2018 and an emergency meeting of the Executive Board of the South African Institution of Civil Engineering (SAICE), the Institution apologises unreservedly for the recently published article titled Out on a Rib and the dis-tress it has caused. The Board has announced that it has accepted an apology from CEO Manglin Pillay and that processes are being implemented to deal with this matter internally. It has also confirmed that Pillay will remain as its CEO.
“While the publication of Pillay’s article was unfortunate, we cannot ignore his invaluable contribution to SAICE and to the broader engineering sector over the past eight years. The Board has accepted his apology and his
acknowledgement of the public furore this has caused,” said Errol Kerst, president of SAICE.
“The Board regrets the publication of Pillay’s article. Addi-tional steps have been put in place internally to ensure that this does not happen again.”
Kerst has said that the Board has agreed to establish an inclusive team to intensify existing initiatives to redress gender and diversity issues within the engineering sector.
Issued by the South African Institution of Civil Engineering (SAICE)
For more information please contact
Nadeena Le’ Tang
Tel: 011 805 5947
Cell: 071 008 2052
E-mail: [email protected]
Corrections to published SAICE forms of contract
Kindly note that corrections to the published SAICE forms of contract, their Guides and their corrected pro forma forms, can be downloaded from the SAICE website page entitled GCC: Pro-forma Templates, Corrections & FAQ at http://saice.org.za/gcc-corrections-faq/
Corrections to the following SAICE publications have been published and are available for download:-
• General Conditions of Contract for Construction Works Third Edition (2015) First Print ISBN 978 0 6399234 0 6 • General Conditions of Contract for Construction Works Third Edition (2015) Second Print ISBN 978 0 6399234 0 6 • Guide to the General Conditions of Contract 2015 Second Edition (2015) ISBN 978 0 6399234 1 3 • General Conditions of Subcontract for Construction Works First Edition (2018) ISBN 978 0 6399234 2 0 • General Conditions of Contract for Construction Works (Simplified Form) First Edition (2018) ISBN 978 0 6399234 3 7
The corrections are mostly of a minor nature, and cover format, layout and spelling. These amendments apply to specific print edi-tions, and will be incorporated in in subsequent prints. Significant corrections were made to the Guide to the General Conditions of Contract.
The pro forma forms can also be downloaded in MS-Word format from the same page on the SAICE website. Users are advised to regularly monitor the SAICE website for any further corrections.
BT Czanik Pr Eng Chairperson: SAICE PMCD Contractual Affairs Committee 11 July 2018
GIGSA NEWSLETTER AUGUST 2018 23
CALENDAR
GIGSA Photo Competition Winner 2017
Company: Aquatan
Photographer: Mr Willie Botha
Installation of a floating cover to the Neptune Reservoir in Simons Town. The system comprised of a waterproofing liner and a
floating cover and included a leakage detection system.
Date Event/Info Host Location Abstract Submis-
sion Deadline
2018
10-14 Sep Electro Mining 2018
https://www.electramining.co.za/ Electro Mining
Nasrec, Gauteng,
RSA Not applicable
16-21 Sep 11 ICG
http://www.11icg-seoul.org/ IGS
Seoul,
South Korea Closed
16-18 Oct WasteCon 2018
http://www.wastecon.co.za/ IWMSA
Emperor’s Palace,
Gauteng Closed
29-31 Oct
6th International Mining and In-
dustrial Waste Management Con-
ference
www.geotechnicaldivision.co.za
SAICE Legend Resort,
Limpopo Closed
2019 7-10 Oct
17th African Regional Conferen-
ce on Soil Mechanics and Geote-
chnical Engineering
www.arc2019.org
SAICE
Cape Town Inter-
national Conven-
tional Centre
Closed
GIGSA NEWSLETTER AUGUST 2018 24
BENEFACTORS
Engineered Linings (Pty) Ltd
www.englining.co.za
(T): (021) 551 2430
(E): [email protected]
Kaytech (Pty) Ltd
www.kaytech.co.za
(T): (031) 717 2300
(E): [email protected]
Aquatan (Pty) Ltd
www.aquatan.com
(T): (011) 974 5271
(E): [email protected]
Fibertex South Africa (Pty)
www.fibertex.com/
www.geotextilesafrica.co.za
(T): 031 736 7100
(E): [email protected]
SRK Consulting (Pty) Ltd
www.srk.co.za
(T): (011) 441 1111
(E): [email protected]
Jones & Wagener (Pty) Ltd
www.jaws.co.za
(T): (011) 519 0200
(E): [email protected]
Gundle Geosynthetics (Pty) Ltd
www.gundlegeo.co.za
(T): (011) 813 2180
(E): [email protected]
ARQ Consulting Engineers (Pty)
www.arq.co.za
(T): (012) 348 6668
(E): [email protected]
Reinforced Earth (Pty) Ltd
www.recosa.co.za
(T): (011) 726 6180
(E): [email protected]
Maccaferri Africa (Pty) Ltd
www.maccaferri.com/za
(T): (031) 705 0500
(E): [email protected]
Gast (Pty) Ltd
www.gast.co.za
(T): (012) 660 1616
(E): [email protected]
Fraser Alexander (Pty) Ltd
www.fraseralexander.co.za
(T): (011) 929 3600
(E): [email protected]
Stefanutti Stocks (Pty) Ltd
www.stefanuttistocks.com
(T): (011) 571 4300
(E): [email protected]
Golder Associates Africa (Pty) Ltd
www.golder.com
(T): (011) 254 4800
(E): [email protected]
Total Terrain Lining Systems (Pty)
www.ttls.co.za
(T): (011) 467 0892
(E): via website
AKS Lining Systems (Pty) Ltd
www.aks.co.za
(T): (021) 983 2700
(E): [email protected]
GIGSA NEWSLETTER AUGUST 2018 25
BENEFACTORS
Hefer Plant (Pty) Ltd
www.heferplant.co.za
(T): 011 412 4302
(E): [email protected]
Integrated Polypropylene Products
www.poly-prop.co.za
(T): (031) 710 4446
(E): via website
Plasti-Weld c.c.
www.plastiweld.co.za
(T): (011) 849 9058
(E): [email protected]
Rho-Tech
www.rho-tech.co.za
(T): (031) 914 0966
(E): [email protected]
Geo-X (Pty) Ltd
www.geo-x.co.za
(T): (011) 3140023 / 3140058
(E): [email protected]
WBHO (Pty) Ltd
www.wbho.co.za
(T): (011) 321 7200
(E): [email protected]
Spilo (Pty) Ltd
www.spilo.co.za
(T): (021) 862 6100
(E): [email protected]
Beal Consulting (Pty) Ltd
www.beal.co.za
(T): (012) 809 4383
(E): via website
Accuplas Plastic Engineering CC.
(T): (014) 596 5279
(E): [email protected]
Knight Piésold (Pty) Ltd
www.knightpiesold.com
(T): (011) 806 7111
(E): via website
TRI Africa Environmental Services
(Pty) Ltd.
(T) 079 875 5691
Independent Geosynthetic Testing
(T): 082 348 2022
(E): [email protected]
GeoKatanga
www.geokatanga.com
(T): (011) 84 611 8819
Geobrugg
www.geobrugg.com
T): (011) 794 3248
E): via website (
Hefer Plant (Pty) Ltd
www.heferplant.co.za
(T): 011 412 4302
(E): [email protected]
Integrated Polypropylene Products
www.poly-prop.co.za
(T): (031) 710 4446
(E): via website
Plasti-Weld c.c.
www.plastiweld.co.za
(T): (011) 849 9058
(E): [email protected]
Rho-Tech
www.rho-tech.co.za
(T): (031) 914 0966
(E): [email protected]
Geo-X (Pty) Ltd
www.geo-x.co.za
(T): (011) 3140023 / 3140058
(E): [email protected]
WBHO (Pty) Ltd
www.wbho.co.za
(T): (011) 321 7200
(E): [email protected]
Spilo (Pty) Ltd
www.spilo.co.za
(T): (021) 862 6100
(E): [email protected]
Beal Consulting (Pty) Ltd
www.beal.co.za
(T): (012) 809 4383
(E): via website
Accuplas Plastic Engineering CC.
(T): (014) 596 5279
(E): [email protected]
Knight Piésold (Pty) Ltd
www.knightpiesold.com
(T): (011) 806 7111
(E): via website
TRI Africa Environmental Services
(Pty) Ltd.
(T) 079 875 5691
Independent Geosynthetic Testing
(T): 082 348 2022
(E): [email protected]
GeoKatanga
www.geokatanga.com
(T): (011) 84 611 8819
Geobrugg
www.geobrugg.com
T): (011) 794 3248
E): via website (
