ACEM Engineering Awards 2013

8/12/2019 ACEM Engineering Awards 2013

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ACEM Engineering Award 2013

Gold Award of Special Merit

Arup Jururunding Sdn Bhd

Gurney Paragon is located along Gurney Drive in Penang,consisting of two phases. Phase One comprises two 43-storeyhigh end residential towers with food and beverage outletson the lowest three levels. The ground floor level features anopen square (Festival Square) between the two towers frontingan almost 100 year old three-storey heritage building the St.Josephs Novitiate.

Phase Two is a retail complex.

A common two and three level basement underlies both phases.

Arup Jururunding Sdn Bhd is the Civil, Structural and Geotechnicalconsulting engineers for Phase One.

The Clients requirements for St. Josephs@Paragon were topreserve the entire structure and building fabric that will keep itsintegrity. St. Jos existence has to be given a new lease of life andfunctionality within the new development.

St. Jos is an old load bearing masonry building. Vertical loadcarrying elements are predominantly brick columns. The brickcolumns rested on footings comprising either stone slabs, oldbrick mats and concrete footings. Reinforced concrete beamsspan between the brick columns supporting timber joists andfloor boards.

The engineering challenge of St. Jos did not lie in the conservationor rehabilitation of the superstructure, which was generally ingood condition. The challenge was ensuring the St. Jos wouldnot be adversely affected by the two-level basement excavation

and construction all around it, and to ensure that such adverseeffects, if any, would neither be short term nor long term.

The Underpinnings of St. Josephs Novitiate Building won ArupJururunding Sdn Bhd the Gold Award of Special Merit, the highestACEM Engineering Award, conferred in recognition of excellentengineering solution and outstanding merit.

St. Josephs @ Paragon.

The solution adopted by Arup was to give St. Jos new pilefoundations, support it on those new piles, then go below thebuilding, remove the earth under it and create two levels ofbasement under St. Jos.

A new ground oor slab-and-beam oor plate was conceivedthat would be supported by new micropiles was installedunder St. Jos.

Load paths were created to allow almost the entiresuperstructure load to be supported by the slab-and-beamplate which was supported by micropiles.

Small excavators were used to dug out the earth below St.Jos, exposing the old foundations and allowing them todrop. As the old foundations were removed, the casting ofthe ground floor plate began.

When the old brick columns were supported by the new

ground floor plate, excavation proceeded to the lowestbasement level (B2).

Basement construction under St. Jos began with the castingof B2. The B2 slab was bonded to the micropile shafts forminga raft. The micropile shafts were then cast up to the soffitof B1 by encasing in concrete with steel bars thus becomingreinforced concrete columns. B1 beams and slabs were thencast up to the soffit of the slab-and-beam plate at the groundfloor. The last bit of column casting at the top just under thesoffit was achieved by the pumping of grout.

The successful underpinning of St. Jos gave it a new foundationand two levels of basement slabs had been created under it.

The cost of the Arups innovative engineering solution costsapproximately RM 3.5 million. Yet, the engineering solutionemployed had made possible the conservation of St. Jos, turningit into an integral part of a new development by ensuring itslong term accessibility and usage. Arups impressive work createdvalue for the Client and brought about immense benefits to thecommunity at large.

The ACEM Engineering Awards 2013 was organised in conjunction with the ACEM 50th Anniversary Dinner of the Association. Thecompetition was open to ACEM Member Firms only and this year, the Panel of Judges has awarded six entries with the following awards:

Gold Award of Special Merit to Arup Jururunding Sdn Bhd

Silver Award of Merit to SMHB Sdn Bhd Silver Award of Merit to HSS Integrated Sdn Bhd

Silver Award of Merit to Angkasa Consulting Services Sdn Bhd

Bronze Award of Commendation to T Y Lin International Sdn Bhd Bronze Award of Commendation to Minconsult Sdn Bhd


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Silver Award of Merit

SMHB Sdn Bhd

The beautification and rehabilitation of the Sg. Melaka was aninitiative by the Melaka State Government to enhance the tourismpotential of the state and improve the living environment of theresidents.

SMHB Sdn Bhd is the Civil and Structural consulting engineers

responsible for the engineering design and constructionsupervision works for the project.

The condition of river bank and water quality of Sg. Melaka hasdeteriorated over the years due to population density on the riverbank and absence of a sewerage system in the area. Sewagewas discharged into drainage channels and into the river withoutproper treatment, contributing towards the degradation of thewater quality in the river.

The Sg. Melaka project posed various constraints including limitedriver reserve, soft marine clay conditions, close proximity of houses,diurnal tidal uctuations from RL -0.5m to RL +1.20m, presenceof boat traffic and inaccessibility of certain stretches by land. Dueto proximity to residential and commercial properties, there is also

limited land availability and social impact considerations.

SMHB conceptualized a holistic approach requiring improvementto the river banks, providing wall structures to improve thesupports for the building sitting directly alongside the river banks,drainage improvements, provision of an interceptor sewer systemand sewage treatment plant, attenuation of localized oods usinga storm water pumping system and a barrage system for controlsof river levels.

Requirements for the engineering design and subsequentenhancement were supported by flood modeling and tidal study,sedimentation study, physical model study for the barrage, waterquality modeling and environmental study.

SMHB overcomed major challenges in the project by employingeffective and innovative engineering solutions that took care ofenvironmental and social issues as well.

(i) Five (5) types of river embankment wall were designed to suitthe surrounding conditions along different stretches of the Sg.Melaka riverbank.

(ii) Interceptor Sewers were introduced to cut off the dischargeof partially and untreated sewage from entering the riverdirectly. These interceptor sewers would form part of acentralized sewerage system to be provided for the city ofMelaka later.

(iii) A storm water system was designed to manage the combinedsewage and storm water flows using a pumping systemcomprising a flow separator chamber, a one-way flow checkvalve, and storm water pumps. This dual system caters to dryweather and wet weather flows.

(iv) Minor dredging of the river bed was carried out to compensatefor the loss of waterway area due to the construction of theriver revetment walls and to remove the toxic mud deposit.

(v) Tidal barrage was designed to allow for river boat cruisingalong Sg. Melaka by providing a consistent depth of wateralong the river. The structure is also able to evacuate floodows and minimized local ooding due to high tides andupper catchment inflows in the surrounding riverine areas.

(vi) A bridge was built across Sg. Melaka to access the new CIQcomplex which had been relocated to the core island. Dueto the limited land available at the core island, the bridgeembankment was designed to be curved to avoid the newCIQ complex.

SMHB has successfully fullled the Clients requirements withthe project completed on time and within budget. The people ofMelaka has benefited from the beautification and rehabilitationof Sg. Melaka

Sg. Melaka is gradually becoming a clean and living river againdue to the sewer interception system. The water quality hasimproved from Class IV status (polluted) to Class III (slightlypolluted).

The construction of the Barrage at the river mouth hasenabled the river water level to be maintained at a relativelyconstant depth. Aesthetics of the riverfront has improved.Recreational activities can be held along the river and cruises

can take place throughout the year. The storm water pumping scheme helped alleviate the local

flooding at Kg. Morten, improving the quality of life of itsresidents.

The city of Melaka is able to tap the tourism potential providedby Sg. Melaka and create job opportunities for local residents.

Sungai Melaka Rehabilitation and Beautification Project.


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HSS Integrated Sdn Bhd

The Penang Bridge was built in 1985, as a tolled road crossing,maintained and operated under a concession agreement. Theoverall length of the crossing, including interchanges on eitherside, is approximately 13.5 km, of which 8.5 km is over water.The marine sections comprise a 440m long cable-stayed bridgeover the main navigation channel, high-level approach viaducts,a 1.8 m long low-level approach viaduct on the Penang Islandside, a 3.96 km long low-level approach viaduct on the Prai sideand several interchange structures on the Penang Island shoreline.The existing cable stayed bridge and high-level approach viaductswere built to dual three-lane standard, while the low levelapproach viaducts were built to dual two-lane standard.

The concession company was required, under their concessionagreement, to widen the low-level viaducts at an appropriatetime to enable trafc capacity and toll revenue to be maximized.In 2003, the concession company commissioned HSSI to examineoptions for widening the whole length of the low-level viaductsand the ramps on the interchange at the Penang Island shoreline.

The Clients requirements included:

(i) the structural widening of 5.76 km of low-level viaducts tocarry a road carriageway from dual two-lane to dual three-lane (with larger-width nearside lanes to accommodate thehigh number of motorcycles using the crossing).

(ii) Minimum disruption to traffic during construction of thewidening, including no reduction in lane number or widthduring day time and minimum lane closures during night.

(iii) The widening works should cause no damage to the existingviaduct approach spans or their piled foundations, nor shouldthey affect the serviceability of the existing crossing.

The widening of the existing Penang Bridge posed the followingchallenges:

Long term safety and integrity of the bridge A browneld site Proximity of the existing bridge foundation Systematic monitoring of bridge

Variable and poor ground conditions Pile construction issues

The role of HSSI Integrated Sdn Bhd covered:

Overall management and coordination of the preliminarystudy

Preliminary highway engineering design and study Preliminary utilities and drainage engineering design and

study Detailed highway engineering design Detailed utilities and drainage engineering design Preparation of tender documents and drawings Technical support and supervision for construction works.

To suit the Clients requirements, HSSI adopted a widening schemethat involved extending the substructure at each pier location andproviding two additional longtitudinal beams with a compositedeck slab on each side of the deck in each span. At each pier,two reinforced concrete bored piles were provided at each endof the existing pilecap to support an extension to the pilecap, anew column and an extension of the existing crosshead in orderto accommodate the extended deck. Structural connectionsbetween the existing and new works were provided at the pilecapand at the deck slab.

Engineering solutions and innovative approaches adopted byHSSI in the project addressed the concerns of:

The scope and complexity of piling works;

Layby widening/sliding; Deck stitching works; and Monitoring of existing structure.

HSSIs contribution in the successful completion of the projectover a four year period with full compliance to the Clientsrequirements is to be commended.

Widening of the Existing Penang Bridge.


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Angkasa Consulting Services Sdn Bhd

The project is one of the pioneering green energy projects inMalaysia under the renewable energy programme. The projectstarted in 2005 when RE is relatively new to the public. Due tothe low tariff then and the stringent condition on power factorimposed on the developer, many mini- and small-hydropowerprojects were not financially viable and therefore not implemented.

The Clients requirement was to develop a small hydropowerplant for green energy generation and achieve maximum returnon investment while meeting the conditions stipulated byGovernment agencies

(i) Optimum power plant design while maximizing ROI.

(ii) No reduction in ow at Chamang Waterfall after powergeneration;

(iii) No interruption to the recreational activities by constructionactivities;

(iv) Minimum Annual Capacity Factor of 0.8 imposed by TNB.

Angkasa Consulting Services Sdn Bhd is the engineering

consultant and lead consultant for the project.In order to achieve the minimum of IRR of 12% so that the projectis viable for implementation, ACS has evaluated many designoptions and value engineering to optimize the design.

Deserving mention is ACSs originality and innovative approachin power potential analysis. ACS has developed a method toestimate the flow duration curve of the river at an un-gauged sitewhich can be used to estimate the hydropower potential of theproposed scheme. A quick method to estimate the hydro powerpotential of the proposed site (that has no nearby river gaugingstations) during the feasibility study stage is essential for screeningand selection of design options. This new approach is named asNormalized Flow Duration curve method.

This 4MW hydropower project is constructed in an environmentallysensitive area located in the Bukit Tinggi forest reserve, at theChamang Waterfall recreational area. This project demonstratedthat, with careful selection of site, attention to details in designand construction and risk management, natural resources can beharnessed without significant negative impact to the environment.

The key challenge in this project is to manage the risk of damageto the natural environment particularly the recreational value ofthe Chamang Waterfall and camping ground along Perting river.It is critical to preserve the water quality of the river which candeteriorate due to construction activities and operation of thehydro power plant. The steep terrain and high rainfall intensityalso posed a challenge to control the soil erosion.

Key engineering features of the project:

The position of the power house is sited just above the

Chamang Waterfall so that its water emission from theturbines after power generation forms part of the picturesquewaterfall at the recreational site;

The project utilizes natural water resources available and thehydraulic head at the Sg. Perting to generate electrical energy.

Avoiding unnecessary disturbance to natural groundconditions and the soil erosion control measures put in placehas successfully mitigated soil erosion problems.

This small hydropower plant made a small but significantcontribution to the green economy of Malaysia, generatingelectricity from a RE source thus reducing carbon emission,avoiding environmental pollution caused by burning of fossil

fuels and has no negative impact as it does not involve any treecutting or deforestation.

The power plant has been performing well beyond the Clientsexpectation, and has been classified as one of the best performingplant by SEDA and Bank Pembangunan.

Cadangan Pembangunan Janakuasa Mini-hidro Di Sg. Perting, Bentong, Pahang.


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Bronze Award

of CommendationT Y Lin International Sdn Bhd

CapSquare Tower 2 is part of the Capital Square mixeddevelopment and is a prominent landmark along Lebuh Ampangand Jalan Dang Wangi, Kuala Lumpur. Its construction started in1996 but was suspended in Level 1 due to the 1997 economiccrisis. The project resumes in 2008 and completed in 2011 afterseveral major design revamps to meet new buyers requirements.

T Y Lin International Sdn Bhd is the Civil and Structural consultingengineers in respect of the schematic design, design development,tender and contract documentation, contract implementation

and management of the project.

CapSquare Tower 2 stands on top of eight (8) nos of 3.0mdiameter columns. With its 31.13m wide frontal columns, theentire tower of 40 storeys sits over a 7.65m deep transfer beamstructural system above the grand lobby.

The structural system of the project was put in place in 1996.When the project resumed in 2008, the Client imposed newrequirements which included:

(i) Increase of net sellable oor area from 550,000 to 600,000sq. ft.;

(ii) Relocation of 6 nos. of perimeter column at L25 and above;

(iii) Commitment of 38 month design and construction completiontime;

(iv) Addition of main entrance hanging canopy;

(v) Removal of key holds faade feature; and

(vi) Strengthening works for independent plant and equipment atBasement 2.

The structural challenge posed by the new requirementsinitiated a total review and re-design of the structure, with due

consideration to the constraints of the as-constructed structureup to that point in time. T Y Lins following creative engineeringsolutions fulfilled the Clients requirement:

Introduced a second transfer structure system at Level25/25M to reduce loading due to the additional oor areasonto the existing transfer beam at L1 to minimize hackingand re-construction works.

Optimized the structural oor framing elements to minimizeweight to cater for the increase of floor areas and to eliminateunderpinning to existing foundation.

Introduced a symmetrical inclined frame structure system fromL26 to L30 to meet Clients requirement of column free ofcespace and at the same time, to eliminate any strengthening

work to the existing structures.

Provided structure solution on additional grand hangingcanopy at the existing ground oor;

Provided structure solution on the new centralized plant roomat basement.

Provided effective solution to rectication work to transferbeam columns at L1.

The structure also featured environmental considerations throughthe reused of L1 pre-stressing strands (after verifying the capacity)and used of recycled materials such as Mascrete containing PFAfrom coal-fired power plant for foundation casting.

CapSquare Tower 2 was completed ahead of schedule by nearly1.5 months, made possible by T Y Lins engineering designsolutions and approaches in problem solving.

CapSquare Tower 2.


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Bronze Awardof Commendation

Minconsult Sdn Bhd

With the enactment of the Fit-in-Tariff (FiT) under the RE Act

2011, small RE power producers have been granted the Feed-in

approvals by SEDA for 2012, the first year of implementation of

the FiT programme.

Eight (8) Clients have successfully rolled out their respective

FiT building-integrated solar PV generation systems on existing

factory/warehouse rooftops located in Shah Alam and Port Klang

industrial zones. These totaled up to approximately 6.5MW

installed capacity at rooftop and 1MW of ground mounting

installation at the end of 2012.

Minconsult Sdn Bhd in association with Pathgreen Energy Sdn

Bhd have been engaged by these Clients as the engineering,

procurement, construction/commissioning and project

management consultant in the implementation of this first FiT

factory/warehouse Rooftop Solar PV Projects in Malaysia. The

consultancy services offered to the Clients include:

(i) Detailed electrical power supply designs for both low

voltage DC/AC systems and high voltage 11kV utility grid-tie

interconnection systems; and

(ii) Fast-track project management for procurement of equipment

supply and works packages and supervision of construction/

commissioning activities.

Innovations introduced during the project design stage include:

The design of the generator step-up transformer which has

two/three delta connected LV windings connected to two/

three independent grid-tie central inverters which are the

sources of solar PV power generation.

The design of compact AC substation which houses the

generator step-up transformer/11kV switchgear provides

easy transportation to specific project locations. The inverter

room and compact ACE substation were able to be installed

adjacent to each other, thus allowing Clients to locate these

sub-systems within the space-constrained footprint allocated

by the warehouse owner.

These projects were completed/commissioned for commercial

operation within the tight timeline given by the respective Clients,

i.e., between 3 - 5 months. These projects were also delivered

with lower than the projected budget used in the financial

payback calculation model.

First Large-scale FiT Rooftop Solar PV Projects.

Documents

ACEM Engineering Awards 2013