Method Statement for Installation of Geotextiles

7/18/2019 Method Statement for Installation of Geotextiles

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Method Statement for Installation of Geotextiles

and Rock for Slope Protection

Rev

IssueDate

Issue Status Prepared by Reviewed by Approved by



Document Revision istory

Revision

Summary of !han"es # Detailsof Issue

Date!RS $if applicable%

Ref& 'o& Rev



(able of !ontents

)&* Purpose and Scope&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&+

,&* Document !ontrol&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&+

-&* Reference Documents&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&+

+&* De.nitions/ (erms and Abbreviations&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&0

0&* Responsibility&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&0

1&* Materials and 23uipment&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&0

4&* Resources&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&1

5&* Methodolo"y # Procedure&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&4

6&* ealth/ Safety and 2nvironment&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&5

Appendices:

Appendix A : HSE Risk Assessment.

Appendix B : Drawing

Appendix C : Photos



)&* Purpose and Scope

Furnish a!or" materias" e#uipment and incidentas necessar$ to insta geotextie

%a!ric. &se the 'eotextie in erosion contro appications Back(ed sope Area. )he

'eotextie sha !e designed to aow passage o% water whie retaining insitu soi

without cogging.

*.* )he scope o% works comprises the %oowing separate operations:

• +o!ii,ation o% main and auxiiar$ e#uipment and personne

• +ateria dei-er$ to irku/Speci%$ isand

• )ransportation o% materia to site

• 0nstaation o% 'eotexties

,&* Document !ontrol

1.*)he document go-erning the preparation" registration" appro-a" distri!ution and

amendment 2 re-ision o% this method statement wi !e according to re#uirement

speci(ed in /Speci%$ $our document re%erence 343*56P+'6PSP6333*2)6343*56

ARC76AD+A633**/ procedure for !ontrol of Documents and Records7

1.1)he re#uirements %or document num!ering are addressed in the pro8ect speci(c

procedure /Speci%$ $our document re%erence 9

1.;343*56P+'6PSP633312)6343*56ARC76AD+A633**" %or Pro8ect <um!ering o%

Documents and Records1.=)his method statement is a controed document" and wi !e distri!uted as such to

those detaied on the 0nterna Distri!ution o% Documents +atrix maintained !$ the

Document Controer" whie externa distri!ution wi !e -ia the Secretar$.

-&* Reference Documents

*.* )he %oowing documents de(ne the re#uirements to !e empo$ed to

demonstrate compiance o% the works de(ned in this method Statement:

• Drawings

Ref& (itle

/Speci%$ 343*567D6CS6

3**=6S3*633

/Speci%$ Recamation at ADC7 >ett$

+&* De.nitions/ (erms and Abbreviations

=.*De(nition and )erms

• /Speci%$ ARC7 ; EPC Contractor ?Archirodon Construction 7-erseas Co.S.A@

• A



• D+A67PC7 ; C7+PA< ?A!u Dha!i +arine 7perating Compan$@

• ADC7 ; A&+ De-eopment Authorit$

0&* Responsibility

5.*)he Pro8ect +anager is responsi!e to appoint site super-isor$ personne to

organi,e" coordinate" and o-ersee the execution o% the work detaied in this

method statement.

5.1

5.)he Construction +anager is responsi!e %or the organi,ation and coordination o%

the entire work detaied in this method statement.

5.=)he responsi!e Engineer is responsi!e %or the execution o% the works detaied in

this method statement. He wi !e responsi!e %or instructing the Foremen 2

Superintendent a!out the re#uirements o% the contract" incuding a restrictions"sa%et$ reguations" scope o% work and time schedue. 0n addition" he wi !e

responsi!e %or reated ogistic matters and a matters reated to HSE and the

#uait$ o% the works.

5.5)he Superintendent2Foreman is responsi!e %or the da$6to6da$ impementation and

super-ision o% the works detaied in this method statement.

5.Assigned HSE sta is responsi!e to assist the construction team to de-eop sa%e

methods o% working and to monitor impementation o% the contros as re#uired.

5.Assigned A2C sta is responsi!e to ensure a works comp$ with speci(ed

Pro8ect re#uirements and to monitor impementation o% the contros as re#uired. )he$ sha coordinate with C7+PA< %or -isua inspection acti-ities.

• )he A2C sta reports direct$ to Pro8ect C +anager

• Re-iew and attend inspection o% the works

• Pro-ide guidance and assistance to a site sta

• +onitor the impementation o% this method statement

1&* Materials and 23uipment

.*+aterias

)he main materia to !e utii,ed %or instaation o% 'eotextie is as %oow

• <on 7-en 'eotexties.

• Hand )oos

4& Resources.* Pant:



.1Personne 2 Gork%orce:

Description

Ci-i engineer

HSE ocer

+arine Foreman

Di-ing Super-isor

Di-ers

Ia!or

5&* Methodolo"y # Procedure

5&) Mobili8ation

+o!ii,ation o% e#uipment aread$ paced in work site.

5&, Installation

J.1.* )he geotextie sha !e paced in a!o-e !ack(ed materia with trimmed sope areaon a smooth graded sur%ace. )he geotextie sha !e paced in such a manner thatpacement o% the o-er$ing materias wi not excessi-e$ stretch so as to tear thegeotextie. Anchoring o% the termina ends o% the geotextie sha !e accompished

through the use o% sand !ags crest and toe o% sope.

J.1.1 =53 mm ?*J in@ anchoring pins paced on 33 to *J33 mm ?1= to =5 in@ centers"depending on the sope o% the co-ered area" ma$ !e used to expedite construction.

Auxiliary 23uipment

Di-ing Ca!in

Exca-ator Iong Boom

)rucks

Ioader



J.1. )he geotextie sha !e paced with the machine direction parae to the direction o% water Kow which is norma$ parae to the sope %or erosion contro runo and wa-eaction. 7-erapping sha 8oin ad8acent geotextie sheets. 7-erapped seams o% ro endssha !e a minimum o% *333 mm ? %t@ except where paced under water. 0n suchinstances the o-erap sha !e a minimum o% * m ? %t@. 7-eraps o% ad8acent ros sha!e a minimum o% *333 mm ? %t@ in a instances.

J.1.= Ghen o-erapping" successi-e sheets o% the geotextie sha !e o-erappedupstream o-er downstream" and2or upsope o-er downsope. 0n cases where wa-eaction or mutidirectiona Kow is anticipated" a seams perpendicuar to the direction o% Kow sha !e sewn.

J.1.5 Care sha !e taken during instaation so as to a-oid damage occurring to thegeotextie as a resut o% the instaation process. Shoud the geotextie !e damagedduring instaation" a geotextie patch sha !e paced o-er the damaged area extending* m ? %t@ !e$ond the perimeter o% the damage.

J.1. )he Core materia pacement sha !egin o-er the geotextie at the toe and proceedup the sope. Pacement sha take pace so as to a-oid stretching and su!se#uenttearing o% the geotextie.

J.1. Sope protection and smaer si,es o% stone (ing sha not !e dropped %rom aheight exceeding * m ? %t@" or a demonstration pro-ided showing that the pacementprocedures wi not damage the geotextie. 0n underwater appications" the geotextieand !ack( materia sha !e paced the same da$. A -oid spaces in the Core materiasha !e !ack(ed with sma stone to ensure %u co-erage.

J.1.J Fied monitoring sha !e per%ormed to -eri%$ that the Core +ateria pacement doesnot damage the geotextie.

J.1.*3 An$ geotextie damaged during !ack( pacement sha !e repaced as directed!$ the Engineer" at the ContractorLs expense.

J.1.** Snorke aowed in depth o% +aximum 1.5m .

6&* ealth/ Safety and 2nvironment

4.* )he works sha !e carried out in compiance with the appica!e HSE ega and

contractua re#uirements.

4.1)he signi(cant HSE ha,ards and risks reated to the works co-ered !$ this document

ha-e !een identi(ed" and documented in MHSE Risk Assessment9 attached in

Attachment A.

4. )he identi(ed ha,ards and associated risks and mitigation contros sha !e

communicated to the work%orce through registered Pre6task !rie(ngs at the

!eginning o% each shi%t.

6666 E<D 7F )EN) 6666



A9: DA9I MARI'2;P2RA(I'G !;MPA'<

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Method Statement for

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Appendix AHSE Risk Assessment

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0nstaation o% 'eotexties and (ing

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Appendix B

Drawings




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Appendix C

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