Method Statement for Installation of Geotextiles and Rock for Slope Protection
Re v
Issue Date
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Prepared by
Reviewed by
Approved by
Document Revision History
Revisio n
Summary of Changes / Details of Issue
Date
CRS (if applicable) Ref. No.
Rev
Table of Contents 1.0
Purpose and Scope...............................................................................4
2.0
Document Control.................................................................................4
3.0
Reference Documents...........................................................................4
4.0
Definitions, and Abbreviations.....................................................5
5.0
Responsibility.......................................................................................5
6.0
Materials and Equipment......................................................................5
7.0
Resources............................................................................................6
8.0
Methodology / Procedure......................................................................7
9.0
Health, Safety and Environment............................................................8
Appendices: Appendix A
: HSE Risk Assessment.
Appendix B
: Drawing
Appendix C
: Photos
1.0
Purpose and Scope
Furnish labor, materials, equipment and incidentals necessary to install geotextile fabric. Use the Geotextile in erosion control applications Backfilled slope Area. The Geotextile shall be designed to allow age of water while retaining insitu soil without clogging.
1.1
The scope of works comprises the following separate operations:
Mobilization of main and auxiliary equipment and personnel
Material delivery to Zirku*Specify island
Transportation of material to site
Installation of Geotextiles
2.0
Document Control
2.1The document governing the preparation, registration, approval, distribution and amendment / revision of this method statement will be according to requirement specified in *Specify your document reference 09015-PMG-PSP-0001/T-09015ARCO-A-0011, procedure for Control of Documents and Records” 2.2The requirements for document numbering are addressed in the project specific procedure *Specify your document reference ” 2.3–09015-PMG-PSP-0002/T-09015-ARCO-A-0011, Documents and Records
for
Project
Numbering
of
2.4This method statement is a controlled document, and will be distributed as such to those detailed on the Internal Distribution of Documents Matrix maintained by the Document Controller, while external distribution will be via the Secretary.
3.0 1.1
Reference Documents
The following documents define the requirements to be employed to demonstrate compliance of the works defined in this method Statement:
Drawings Ref.
Title
*Specify
09015-OD-CS0114-S01-00
4.0
*Specify Reclamation at ZADCO Jetty
Definitions, and Abbreviations
4.1Definition and
*Specify ARCO – EPC Contractor (Archirodon Construction Overseas Co.S.A)
A
DMA-OPCO – COMPANY (Abu Dhabi Marine Operating Company)
ZADCO – ZAKUM Development Authority
5.0
Responsibility
5.1The Project Manager is responsible to appoint site supervisory personnel to organize, coordinate, and oversee the execution of the work detailed in this method statement. 5.2 5.3The Construction Manager is responsible for the organization and coordination of the entire work detailed in this method statement. 5.4The responsible Engineer is responsible for the execution of the works detailed in this method statement. He will be responsible for instructing the Foremen / Superintendent about the requirements of the contract, including all restrictions, safety regulations, scope of work and time schedule. In addition, he will be responsible for related logistic matters and all matters related to HSE and the quality of the works. 5.5The Superintendent/Foreman is responsible for the day-to-day implementation and supervision of the works detailed in this method statement. 5.6Assigned HSE staff is responsible to assist the construction team to develop safe methods of working and to monitor implementation of the controls as required. 5.7Assigned QA/QC staff is responsible to ensure all works comply with specified Project requirements and to monitor implementation of the controls as required. They shall coordinate with COMPANY for visual inspection activities.
The QA/QC staff reports directly to Project QC Manager
Review and attend inspection of the works
Provide guidance and assistance to all site staff
Monitor the implementation of this method statement
6.0
Materials and Equipment
6.1Materials
The main material to be utilized for installation of Geotextile is as follow
Non Oven Geotextiles.
Hand Tools
7. Resources 7.1 Plant:
Auxiliary Equipment Diving Cabin Excavator Long Boom Trucks Loader 7.2Personnel / Workforce: Description Civil engineer HSE officer Marine Foreman Diving Supervisor Divers Labor
8.0
Methodology / Procedure
8.1 Mobilization Mobilization of equipment already placed in work site. 8.2 Installation 8.2.1 The geotextile shall be placed in above backfilled material with trimmed slope area on a smooth graded surface. The geotextile shall be placed in such a manner that placement of the overlying materials will not excessively stretch so as to tear the geotextile. Anchoring of the terminal ends of the geotextile shall be accomplished through the use of sand bags crest and toe of slope. 8.2.2 450 mm (18 in) anchoring pins placed on 600 to 1800 mm (24 to 45 in) centers, depending on the slope of the covered area, may be used to expedite construction.
8.2.3 The geotextile shall be placed with the machine direction parallel to the direction of water flow which is normally parallel to the slope for erosion control runoff and wave action. Overlapping shall adjacent geotextile sheets. Overlapped seams of roll ends shall be a minimum of 1000 mm (3 ft) except where placed under water. In such instances the overlap shall be a minimum of 1 m (3 ft). Overlaps of adjacent rolls shall be a minimum of 1000 mm (3 ft) in all instances. 8.2.4 When overlapping, successive sheets of the geotextile shall be overlapped upstream over downstream, and/or upslope over downslope. In cases where wave action or multidirectional flow is anticipated, all seams perpendicular to the direction of flow shall be sewn. 8.2.5 Care shall be taken during installation so as to avoid damage occurring to the geotextile as a result of the installation process. Should the geotextile be damaged during installation, a geotextile patch shall be placed over the damaged area extending 1 m (3 ft) beyond the perimeter of the damage. 8.2.6 The Core material placement shall begin over the geotextile at the toe and proceed up the slope. Placement shall take place so as to avoid stretching and subsequent tearing of the geotextile. 8.2.7 Slope protection and smaller sizes of stone filling shall not be dropped from a height exceeding 1 m (3 ft), or a demonstration provided showing that the placement procedures will not damage the geotextile. In underwater applications, the geotextile and backfill material shall be placed the same day. All void spaces in the Core material shall be backfilled with small stone to ensure full coverage. 8.2.8 Field monitoring shall be performed to that the Core Material placement does not damage the geotextile. 8.2.10 Any geotextile damaged during backfill placement shall be replaced as directed by the Engineer, at the Contractor’s expense. 8.2.11 Snorkel allowed in depth of Maximum 2.5m .
9.0 Health, Safety and Environment 9.1 The works shall be carried out in compliance with the applicable HSE legal and contractual requirements. 9.2The significant HSE hazards and risks related to the works covered by this document have been identified, and documented in “HSE Risk Assessment” attached in Attachment A. 9.3 The identified hazards and associated risks and mitigation controls shall be communicated to the workforce through ed Pre-task briefings at the beginning of each shift.
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ABU DHABI MARINE OPERATING COMPANY (A-OPCO)
SATAH AL RAZBOOT (SARB) PROJECT - EPC Works for Early Site Preparation, Jetty & Seawater Intake Compa ny Doc. No
AD159-Z10001-GPRG-03118
Method Statement for Installation of Geotextiles and Rock for Slope Protection Compan y Project No.
AD159
ARCO Doc. No.
09015-CON-PSP-01-D01-00034
ARCO Project No.
09015
ARCHIRODON CONSTRUCTION (OVERSEAS) Co. S. A.
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Appendix A HSE Risk Assessment SR.# 1
Document No. 09015-HSE-PSP-10-F0200030
Description Installation of Geotextiles and filling on slope protection
Rev B
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ABU DHABI MARINE OPERATING COMPANY (A-OPCO)
SATAH AL RAZBOOT (SARB) PROJECT - EPC Works for Early Site Preparation, Jetty & Seawater Intake Compa ny Doc. No
AD159-Z10001-GPRG-03118
Method Statement for Installation of Geotextiles and Rock for Slope Protection Compan y Project No.
AD159
ARCO Doc. No.
09015-CON-PSP-01-D01-00034
ARCO Project No.
Appendix B Drawings
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ARCHIRODON CONSTRUCTION (OVERSEAS) Co. S. A.
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ABU DHABI MARINE OPERATING COMPANY (A-OPCO)
SATAH AL RAZBOOT (SARB) PROJECT - EPC Works for Early Site Preparation, Jetty & Seawater Intake Compa ny Doc. No
AD159-Z10001-GPRG-03118
Method Statement for Installation of Geotextiles and Rock for Slope Protection Compan y Project No.
AD159
ARCO Doc. No.
09015-CON-PSP-01-D01-00034
ARCO Project No.
Appendix C Photos
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ARCHIRODON CONSTRUCTION (OVERSEAS) Co. S. A.
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ABU DHABI MARINE OPERATING COMPANY (A-OPCO)
SATAH AL RAZBOOT (SARB) PROJECT - EPC Works for Early Site Preparation, Jetty & Seawater Intake Compa ny Doc. No
AD159-Z10001-GPRG-03118
Method Statement for Installation of Geotextiles and Rock for Slope Protection Compan y Project No.
AD159
ARCO Doc. No.
09015-CON-PSP-01-D01-00034
ARCO Project No.
09015
ARCHIRODON CONSTRUCTION (OVERSEAS) Co. S. A.
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ABU DHABI MARINE OPERATING COMPANY (A-OPCO)
SATAH AL RAZBOOT (SARB) PROJECT - EPC Works for Early Site Preparation, Jetty & Seawater Intake Compa ny Doc. No
AD159-Z10001-GPRG-03118
Method Statement for Installation of Geotextiles and Rock for Slope Protection Compan y Project No.
AD159
ARCO Doc. No.
09015-CON-PSP-01-D01-00034
ARCO Project No.
09015
ARCHIRODON CONSTRUCTION (OVERSEAS) Co. S. A.
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ABU DHABI MARINE OPERATING COMPANY (A-OPCO)
SATAH AL RAZBOOT (SARB) PROJECT - EPC Works for Early Site Preparation, Jetty & Seawater Intake Compa ny Doc. No
AD159-Z10001-GPRG-03118
Method Statement for Installation of Geotextiles and Rock for Slope Protection Compan y Project No.
AD159
ARCO Doc. No.
09015-CON-PSP-01-D01-00034
ARCO Project No.
09015
ARCHIRODON CONSTRUCTION (OVERSEAS) Co. S. A.
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ABU DHABI MARINE OPERATING COMPANY (A-OPCO)
SATAH AL RAZBOOT (SARB) PROJECT - EPC Works for Early Site Preparation, Jetty & Seawater Intake Compa ny Doc. No
AD159-Z10001-GPRG-03118
Method Statement for Installation of Geotextiles and Rock for Slope Protection Compan y Project No.
AD159
ARCO Doc. No.
09015-CON-PSP-01-D01-00034
ARCO Project No.
09015
ARCHIRODON CONSTRUCTION (OVERSEAS) Co. S. A.
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ABU DHABI MARINE OPERATING COMPANY (A-OPCO)
SATAH AL RAZBOOT (SARB) PROJECT - EPC Works for Early Site Preparation, Jetty & Seawater Intake Compa ny Doc. No
AD159-Z10001-GPRG-03118
Method Statement for Installation of Geotextiles and Rock for Slope Protection Compan y Project No.
AD159
ARCO Doc. No.
09015-CON-PSP-01-D01-00034
ARCO Project No.
09015
ARCHIRODON CONSTRUCTION (OVERSEAS) Co. S. A.
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ABU DHABI MARINE OPERATING COMPANY (A-OPCO)
SATAH AL RAZBOOT (SARB) PROJECT - EPC Works for Early Site Preparation, Jetty & Seawater Intake Compa ny Doc. No
AD159-Z10001-GPRG-03118
Method Statement for Installation of Geotextiles and Rock for Slope Protection Compan y Project No.
AD159
ARCO Doc. No.
09015-CON-PSP-01-D01-00034
ARCO Project No.
09015
ARCHIRODON CONSTRUCTION (OVERSEAS) Co. S. A.
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ABU DHABI MARINE OPERATING COMPANY (A-OPCO)
SATAH AL RAZBOOT (SARB) PROJECT - EPC Works for Early Site Preparation, Jetty & Seawater Intake Compa ny Doc. No
AD159-Z10001-GPRG-03118
Method Statement for Installation of Geotextiles and Rock for Slope Protection Compan y Project No.
AD159
ARCO Doc. No.
09015-CON-PSP-01-D01-00034
ARCO Project No.
09015
ARCHIRODON CONSTRUCTION (OVERSEAS) Co. S. A.
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