Method Statement for Shoring Work

Submittal Transmittal Detailed, Grouped by Each Number

LC3 (R-15-085-BF-0)

Project # RUH-CP-1502

Tel: Date:

Fax:

3/15/2016

Transmitted To:

Reference Number: 0514

Hadi Omar Harb SSEM P.O. Box 6341 Al Rashid Tower, Tower, 5th Floor Floor Al Ma'athar Ma'athar Street 11442 Riyadh Tel: 4625511 Fax: 4627804

Transmitted By:

Qty

Submittal Package No

Description

1

0119 - Special Conditions - 1

Method Statement for Shoring Work

Due Date

Transmitted For

Tracking Number

Hand

Items

Qty

Description

001

1

Method Statement for Shoring Work

Cc:

Package Action

Reviewed Exceptions Noted

Delivered Via

Action

Paul Teague AECOM P.O. Box 58806 4 Floor, Tower 4, Tatweer Tower 11515 Riyadh Tel: Fax:

Company Name

Notes

Contact Name

Item Action

Reviewed - Exceptions Noted Copies

Notes

Remarks

Reviewed Exceptions Noted, Resubmission Required. 1. Please see attached. Best Regards,

Signature Prolog Converge

Printed on: 3/16/2016

Prolog KKIA

Signed Date Page 1

KINGDOM OF SAUDI ARABIA

GENERAL AUTHORITY OF CIVIL AVIATION CONSTRUCTION OF LOAD CENTER -3

METHOD STATEMENT FOR SHORING First

Rev.

Issue

Date:

A 18.01.16

B 20.02.2016

CONTRACT #:

R-15-085-BF-0

DOCUMENT NUMBER : LC3.KKIA-UN-MSM-GEN-CV-0020-B

METHOD STATEMENT FOR SHORING WORK

Project Quality Manager: Manager:

ENGR. Amr Ibrahim Metwally

Project Manager: Manager:

ENGR. HADI OMAR HARB

Page 1 of 23




Rev.

Issue

Date:

A 18.01.16

CONTRACT #:

B

R-15-085-BF-0


20.02.2016

Table of Contents 1.0

Purpose ………………………………………………………………………………….. 03

2.0

Scope …………………………………………………………………………………….. 03

3.0

References and Standards …………………………………………………………… 03

4.0

Permits and Licenses …………………………………………………………………. 03

5.0

Equipment ………………………………………………………………………………..04

6.0

PPE Materials …………………………………………………………………………… 04

7.0

Resources and Manpower …………………………………………………………….04

8.0

Responsibilities of Key Personnel …………………………………………………..05

9.0

Methodology- Shoring Works ……………………………………………………….. 06

10.0

Health and Safety ………………………………………………………………………. 08

Appendices Appendix 1.0- Job Risk Assessment ………………………………………………..09 Appendix 2.0- Related ITPs ……………………………………………………………11 Appendix 3.0- Checklist ………………………………………………………………. 12 Appendix 4.0- Pro forma Work Permit ………………………………………………23

Page 2 of 23




Rev.

Issue

Date:

A 18.01.16

B 20.02.2016

CONTRACT #:

R-15-085-BF-0


1.0 PURPOSE The purpose of this method statement is to provide description of procedure and method for the construction and installation of shoring works when working in areas of loose and unstable soil condition. Also included are the necessary procedure to ensure health and safety of employees with the requirement stipulated in the Contract Documents, as well as those in Saudi Construction Specifications (ASTM and SASO-ISO) 2.0 SCOPE This method statement covers the analysis, design and implementation of shoring structures to support loose soil during excavation works for the foundation of LC3 Building and the different trenches for underground utilities as part of the contract. 3.0 REFERENCES AND STANDARDS Excavation works will be executed in accordance to the following references & standards: a.

Saudi Arabia Construction Specification.

b.

Employers requirements, Materials Specification

c.

Geotechnical Report, Material and Workmanship Specifications for Earthworks.

d.

Master Plan.

e.

Approved with Comments (AWC) construction drawings.

f.

Approved ITP for excavation works.

g.

SSEM HSE plan and Job Safety Analysis.

h.

SSEM excavation works procedure and OHSA standards.

i.

Approved Quality Control & Quality Assurance.

4.0 PERMITS AND LICENCES "ALL" work related shall be a.

Work Permit

b.

Excavation Permit

c.

Entrance Permit

d.

Barricade Permit

e.

Equipment Permit

define and identified by the contractor. Then it shall be submitted and secure an approval from the Authority Having the Jurisdiction prior to any work implementation on-site.

Contractor shall provide the following: 1. Specific code and standards to be used for this for the above mentioned works. 2. Where are supposed to be survey and geotechnical report which are part of the due diligence of the contractor? 3.Contractor to provide the copy of the approval of all mentioned documents that is already been approved. 4. Contractor shall provide reference number of the SSEM HSE plan aubmitted or approved. 5. Contractor shall provide copy of all the drawings submiital with ENGINEER approval and comments. 6. Contractor shall provide copy of submitted ITP and its approval. 7. Contractor shall provide the copy of the mentioned "Master Plan" All the above comments shall be provided by the contractor with the copy of the approval before it can be used as a reference and standard documents.

other work related permits should be identified by the contractor. Page 3 of 23




Rev.

Issue

Date:

A

CONTRACT #:

B

18.01.16

R-15-085-BF-0


20.02.2016

5.0 EQUIPMENT The contractor (SSEM) will provide the following equipment in the implementation of Shoring activities alongside excavation works. Type of Equipment Excavator Crow Bars Steel mallet, 2 kg. Carpenter’s Basic Tools

Units (No.) 1 6 2 1 lot

Table I. Equipment Intended for Excavation and Shoring Works. and Safety Equipment

6.0 PPE MATERIALS

Personal Protective Equipment (PPE) should be provided in order to perform all works in accordance with the safety procedures and taking into consideration the importance of proper preventive measures to ensure safety in the performance of work. Type of Equipment Safety Helmet Safety Boots Safety Glasses Safety Masks Coveralls High Visibility Vests Hand Gloves Table II. Personal Protective Equipment Intended for Excavation 7.0 RESOURCES AND MANPOWER The workforce including foremen and technicians are all with sufficient qualification and experience. Equipment operators possesses applicable party certificates wherever applicable/relevant. Sub-contractor will be employed if there is need to catch up shortfalls or to accelerate progress. List of subcontractor manpower will be made available once there company is prequalified/accepted by the Engineer. Any person required to undertake work associated with shoring works is accountable for: Complying with the requirements of risk assessment management plan, any permits for work Using personal protective equipment and safety equipment provided Assisting in assessing risk Attending training when required. Only undertaking tasks they are competent to undertake (or are in training to undertake with appropriate supervision) Following reasonable instructions related to work associated with shoring

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Rev.

Issue

Date:

A 18.01.16

CONTRACT #:

B

R-15-085-BF-0


20.02.2016

CONTRACTOR (SSEM) Construction Manager Site Engineer Safety Engineer Equipment Operators Carpenters Laborers First Aiders Table III. Manpower for Shoring Works 8.0 RESPONSIBILITIES OF KEY PERSONNEL 8.1 Construction Manager The Construction Manager must mobilized the required materials, equipment and manpower to do the job as required, and will monitor the activities. He must take note existing shortfall and problems and discuss the same with the Project Manager. Corrective solutions must be identified and applied to compensate for the shortfalls.

change to "shall"

8.2 QA/QC Engineer The QA/QC Engineer will be responsible for the quality aspects of the works. He will assure that the QA and QC plan will be implemented. The required SIR, WIR shall be submitted to The Engineer. All required procedure in shoring works shall be followed to have a safe working condition and quality requirements attained. He will proactively coordinate with the site engineer and issue appropriate internal SOR when he see that performance of works deviate from the approved. Contractor shall include in the QA/QC Engineer scope " That workmanship shall not compromise the health and safety of the worker."

8.3 Site Engineer The Site Engineer will be in charge for the supervision and implementation of all activities as required in the specifications and drawing, especially in giving orders to Site foremen. Site engineer is also in charge for the preparation and filing of reports. Contractor shall include to the Site Engineer responsibility the submission and secure the approval of all site work related permits. Prior to the im lementation of works on-site.

8.4 Site Foreman

change to "shall"

The Site Foreman will be in charge for the supervision and implementation of various steps in shoring works, as instructed by the Site engineer. The Site Foreman shall also keep record of all work schedules, work production and daily safety issues.

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Rev.

Issue

Date:

A 18.01.16

CONTRACT #:

B

R-15-085-BF-0


20.02.2016

8.5 Safety Engineer 

Conduct the safety induction course to all personnel involved in the work.



Monitor and supervise the risk assessment.



Ensure that necessary Permit to Work is available.



Ensure that the project’s method statement and risk assessment are understood and understood, complied and applied in the worksite.



Ensure that all workers are provided with sufficient information regarding workplace hazards and planned control measures.

8.6 Safety Officer 

Supervision of equipment handling, oversee the installation of shoring.



Ensure that relevant work permit is secured prior to start of work.



Ensure that equipment is operational and certified.



Ensure that all drivers/operators are qualified to operate the machines/equipment.



Regular inspection and maintenance of the equipment.



Perform other duties as instructed by the safety engineer.

shall 8.7 Professional Engineer (Deep Excavation Shoring) 

The Professional Engineer will be in charge for the design in compliance with project specification and standards.



The engineer may designate an experienced person on the worksite to conduct a regular inspection.



The designated person should adhere his comments (if any) to the contractor for immediate rectification prior for final inspection. The engineer then issues an inspection report and certification.

9.0 METHODOLOGY-SHORING WORKS 9.1 Sequence of Work 9.1.1

Design of proposed shoring, if needed against load to be supported.

9.1.2

Fabricate shoring, if needed according to drawing, height of excavation.

9.1.3

For trench excavation which needs shoring, install shoring at side of once initial excavation starts.

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Rev.

Issue

Date:

A 18.01.16

B 20.02.2016

CONTRACT #:

R-15-085-BF-0


9.1.3.1

Push the shoring down as the excavation become deeper.

9.1.3.2

Once the desired depth is attained stabilize the side slope to provide collapse.

9.1.4

For open excavation, fix the shoring if required once the desired depth is reached.

9.1.5

Proceed with construction when the side slope has been stabilized or if needed install the shoring.

9.1.6

After completion of work, slowly remove the shoring and proceed with backfilling work.

9.2

The hazards posed to workers working in excavation pit and trenches are potentially fatal. Excavation failures can, however, be largely avoided by installing an adequately designed support system. No worker should be permitted to work in an unsupported trench if the existing soil structure is loose. Other precautions include the avoidance of external load from construction vehicles and excavated spoil being stockpiled too close to the trench.

9.3

The use of adequate shoring, benching and side sloping is essential to control the risk of a collapse or failure of open excavation. Construction of shoring system should consider the following:

9.4



The size and strength of the component members of the shoring



Existing and changing ground conditions



The loads and types of ground or soil conditions to be shored



Static loads near excavation, e.g. spoil pile, buildings and structures



Dynamic loads near excavation, e.g. traffic and excavation equipment



Ground vibration, e.g. heavy traffic, mobile plant, and other activities.



Difficulties or risks that other services may pose i.e. existing or proposed underground services



Location of utility services



Safety during installation and removal.

Shoring of trench excavation should be constructed and implemented strictly in accordance with the design and contract specifications. 9.4.1

In ground composed of moderately firm to firm soil, vertical trench sides may stand unsupported for a considerable period of time, and hence installing of shoring may be disregarded. However, moderate side slope must be provided to make the excavation wall stable.

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Rev.

Issue

Date:

A 18.01.16

CONTRACT #:

B

R-15-085-BF-0


20.02.2016

9.4.2

When the ground condition is poor and has little or no “free -standing” time, shoring/trench wall support should be installed in such a way that the trench wall will not collapse.

9.4.3

After excavation works has been completed, proceed with next activities while checking the integrity of shoring from time to time.

9.4.4

Where existing services crossing a trench or excavation line are encountered, timber board support should be provided the services to prevent possible collapse or damage.

9.4.5

After the works are completed, the support system will be extracted / dismantled in the reverse order of its installation. Persons performing the work in the excavation will not work outside the protection of the ground support system

10.0 HEALTH AND SAFETY During the process of shoring and excavation works, the necessary welfare facilities shall be provided at the project site. The workers shall be provided with safe drinking water, toilets, place to eat their food and place to store their clothes. Tower lights will be used during night time works and is essential for the safety of workers, the equipment and the proper execution of work. Barriers around excavation area shall be installed. All work related training and safety induction for this specific work shall be identified and define in this document by the contractor.

10.1 Issues 

The HSE Engineer has the responsibility for providing help advice to the supervisor who is responsible for the work safety.



No one shall enter an excavation unless it has been inspected and considered a safe place to work in by immediate supervisor.



Ensure that there is safe access to and from all excavation.



Beware of slipping when using ladders in wet conditions.



All employees must wear the appropriate personnel protective equipment.



No person is allowed under loads handled by power shovels/excavators. Banks men must be assigned to monitor the activities.



Prior to start shoring/excavation, it must be determined whether underground utilities i.e., electric, telephone, sewer lines, etc. will be encountered.



Proper slopes to be provided at sides of excavation.



Provide protective barriers, shield systems complying with applicable standards.



Support of shoring must be periodically checked to assure integrity of the system.

Emergency and rescue procedures or strategy incident or accidents related to shoring works. monitoring and evaluation Risk Assessment Risk control

frequency of inspections Page 8 of 23




Rev.

Issue

Date:

A 18.01.16

B 20.02.2016

CONTRACT #:

R-15-085-BF-0


JOB RISK ASSESSMENT:

Contractor shall identify and define all the work related risk on the shorin works.

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Rev.

Issue

Date:

A 18.01.16

B 20.02.2016

CONTRACT #:

R-15-085-BF-0


Page 10 of 23

CONSTRUCTION OF LOAD CENTER 3 (LC-3) AT KING KHALED INTERNATIONAL AIRPORT (KKIA) INSPECTION TEST PLAN FOR CIVIL WORKS CONTRACTOR: SAUDI SERVICES ELECTRO MECHANICAL WORKS. CO. (SSEM) (Close Joint Stock Company) CONTRACT NO.: R-15-085-BF-0

ITP Ref. No.: Sec No.:

TITLE: CIVIL WORKS

Sec Title.:

Activity No. 2.0 2.1 2.1.1 2.1.2 2.1.3 2.1.4 2.1.5 2.2 2.2.1 2.2.2 2.2.3 3.0 3.1

Activity Description

Availability of permit Location and Layout of area to be excavated Checking and grading and elevation for conformity to drawing Check the excavated area for freedom from extraneous materials and water Disposal of excavated materials BACKFILLING Check fill materials for conformity to specifications Check foundation for Bitumen coating for polyethylene covering Check thickness of Backfill layer and Compaction

3.1.2

3.1.6

Test Required

Code/Spec/Etc.

Acceptance Criteria

SSEM

AECOM

Demonstrated Evidence Report/Checklist

Verification of Permit Check Approved Survey Data Layout Visual Inspection/Survey Visual Inspection

Prior to Proceed for Excavation Prior to Proceed for Excavation Prior to Proceed for Excavation Prior to Proceed for Excavation

SSEM CHECK

Tender Requirements

SSEM CHECK

Technical Specification Technical Specification Civil Works Technical Specification Civil Works Technical Specification Civil Works

SSEM CHECK SSEM CHECK

Visual Inspection

During Excavation

SSEM CHECK

Soil Classification

Approved Stock File

Third Party Test

Visual Inspection

Before Backfilling

SSEM CHECK

Field Density Test (ASTM D1556) Nuclear Density Test (ASTM D2922)

4 Random FDT at least per lot of 2,500 sq.m.

Third Party Test

Verification of Permit

Prior to Proceed for Trenching

SSEM CHECK

Tender Requirements

Visual Inspection/Survey


SSEM CHECK

Technical Specification Civil Works

Visual Inspection/Survey


Visual Inspection

During Trenching

SSEM CHECK

Visual Inspection

During Trenching

SSEM CHECK

Technical Specification Civil Works A9010 Part I Sec.2.1 Technical Specification Civil Works

Valid Permit Approved Construction Drawings Approved Construction Drawings

H

R

Checklist Form IC-C-002

H

W


H

W


Project Specification

W

S


Approved Designated Disposal Area

W

S


Test Result Compliance w/ the Project Specification

H

R



H

W



S/H

W


Valid Permit

H

R


H

W


H

W

Checklist Form IC-C-003 Checklist Form IC-C-003

Technical Specification Civil Works A9010 Part I Sec.2.1

TRENCHING AND BACKFILLING OF PIPELINES TRENCHING

Location and Layout of area to be trenched and mark the routing of existing underground utilities

3.1.5

Stage / Frequency

Method of Verification

Reference Documentation

EXCAVATION AND BACKFILLING EXCAVATION

Availability of permit

3.1.4

Date: October 2015

Inspection / Test Requirements Test or Inspection Performed

3.1.1

3.1.3

ISSUANCE: 01 REVISION: 00

Checking grading and elevation for conformity to drawing Ensure proper care to avoid damages to existing utilities Check the excavated area for freedom from extraneous materials and water Disposal of excavated materials

ABBREVIATIONS:

Visual Inspection

After Excavation

Technical Specification Civil Works Technical Specification Civil Works Technical Specification Civil Works Technical Specification Civil Works

SSEM CHECK

SSEM CHECK

N/A – NOT APPLICABLE

Note: Page 1 of 1

Approved Construction Drawings/Client As-Built Drawings Approved Construction Drawings Client Engineering Standard

S

W


H

W


Approved Designated Disposal Area

S/H

S


W-

WITNESS PONT

S –

SURVEILLANCE

H –

HOLD POINT

RR – REVI EW OF REPORT

AECOM- Consultant SSEMPage 11 Contractor

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CONSTRUCTION OF NEW LOAD CENTER-3 AT KING KHALED INTERNATIONAL AIRPORT

EXCAVATION, BACKFILLING and SPOILING CHECKLIST IC Checklist No.: 085-IC-C-002 Project: Construction of New Load Center-3 ITP Ref. No.: 085-ITP-C-2.0 Contract No.: R-15-085-BF-O Sec.: Facility Name:

Drwg. No. / Line No.: Work / item for Inspection: Item

1 1.1 1.2 1.3

1.4

1.5

1.6

1.7

Activity

Area/Location:

SSEM

SSEM

Engr.

QC

GACA/AECOM Representative A R N/A

Corr. Sign Off

Remark s

EXCAVATION Excavation Permit Location, Layout of area to be excavated If any existing service lines, utilities & utility structures which are to remain in service are uncovered or encountered during operations, they shall be safeguard, protected from damage and supported Provide bracing, shoring, sheeting, sheet piling, underpinning or other retaining structures necessary to protect against any movement or settlement of existing structure or utilities near the excavation area Line and grade of excavated area is as per plan & specification Rock, loose rock, boulders and other material unacceptable for subgrade shall be excavated to an extra depth of minimum 250 mm below the top of the subgrade (the formation level) or as instructed by the Engineer. The extra depth, that results due to rock removal or excavation of other unacceptable material, shall be

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1.8

1.9

1.10

1.11

1.12

refilled with approved fill material, obtained from the specified excavation and shall be compacted as specified. All loose or protruding rocks on the back slopes of the cuts shall be barred loose, or otherwise removed to the line of finished grade or slope. Blasting, when necessary, will be permitted only when the operations are approved by the Engineer, all permissions are obtained (appropriate authorities) and proper precautions have been taken for the protection and safety of all persons, the work and the property. All damage done to the work or property shall be repaired at the contractor’s expense. Any approval given will not relieve the contractor of his responsibility in blasting operations. Areas within the airport property where borrow excavation takes place shall be indicated in the drawings. They will only be available after a written agreement from the Engineer has been obtained. When source for borrow excavation are outside the airport property, it shall be the contractor’s responsibility to locate the source and obtain the required permits, subject to the approval of the Engineer. The Contractor shall notify the Engineer sufficiently in advance of the beginning of borrow excavation so that the necessary measurements and test can be made.

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1.13

1.14

2 2.1 2.2

2.3

2.4

2.5

All borrow pits shall be opened up to expose the vertical face of various strata of acceptable material, to enable obtaining a uniform product. All work involved with clearing, stripping and removal of unacceptable materials from borrow pits shall be excavated to regular lines to permit accurate measurements and shall be drained and left in a neat and presentable condition with all slopes dressed uniformly. All suitable material from drainage excavation shall be placed in specified fill areas and unsuitable material shall be used, for topsoiling purpose of, as instructed. BACKFILLING Material for backfilling approved For structure, check first the foundation for bitumen coating or polyethylene cover before backfilling Compaction of finish surface to receive fill material is in accordance with the specification Fill structures shall be constructed with acceptable material, as specified, placed in successive horizontal layers of not more than 200 mm in loose depth, for the full width of the cross section, unless otherwise approved by the Engineer. The grading operations shall be conducted, to produce a soil structure as shown on the typical cross section or as directed. Material such as brush, hedge, roots, stumps, grass and other organic matter,

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2.6

2.7

2.8

2.9

2.10

shall not be incorporated or buried in the fill structure Stones or fragmentary rocks larger than 100 mm in their greatest dimensions shall not be allowed in the top 150 mm of the fill structure. The material in the layers shall be within ±2% of the optimum moisture content before rolling to obtain the specified compaction. Wetting or drying of the material and manipulation to secure a uniform moisture content throughout the layer may be required. Should the material be too wet to permit proper compaction or rolling, all work on all of the affected portions of the fill structure shall be delayed until the material has dried to the required moisture content. Sprinkling of dry material to obtain the proper moisture content shall be done with the approved equipment that will satisfactory distribute water. Sufficient equipment to furnish the required water shall be available at all times. Compaction areas shall be kept separate and no layer shall be covered by another layer until the proper density shall be obtained. Rolling operations shall be continued until all layers are compacted to not less than the specified compaction. Any areas inaccessible to a roller shall be compacted by mechanical tampers. During construction of fill the Contractor shall route his

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2.11

2.12

2.13

2.14

2.15

2.16

2.18

equipment at all times, both when loaded and when empty, over the layer as they are placed and shall distribute the traffic evenly over the entire width of the fill. Fill operations shall be suspended at any time when satisfactory results cannot be obtained because of adverse weather or other unsatisfactory conditions in the field. Tests shall be taken at specified intervals. Based on this tests the Contractor shall make corrections and adjustments in work method or moisture content in order to achieve the specified compaction. Any area found to lack the required compaction shall be further compacted or watered and/or scarified, or otherwise manipulated as the Engineer may instruct, until the specified compaction is obtained. Rock fill shall be brought up in layers not exceeding 0.60 mm and every effort shall be made to fill the voids with the finer material to form a dense, compact mass. Each (rock) layer shall be levelled and smoothed with the suitable grading equipment and by distribution of spalls and finer fragments of rock. Rock fill shall not be applied in the top 1.2 meters of the finished subgrade. Density requirements will not apply to portions of fill structure constructed of materials which cannot be tested in accordance

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2.17

3 3.1

3.2

3.3

3.4

with specified methods (like rock fill). Proceed backfilling to another layer if preceding layer is in accordance with the required density, lines and grade SPOILING The Contractor shall during his Site inspection in the tender period, contact the employer to obtain information regarding the destination of unacceptable materials and surplus materials. These materials remain the property of the Employer unless the Employer transfers his ownership to the Contractor. Unacceptable materials and surplus materials that are released by the Employer, shall become the property of the Contractor. They shall not be spoiled or stockpiled on site and shall be removed off the airport property. The Contractor shall make his own arrangements with other public agencies, the municipality or private companies or landowners for the spoiling of unacceptable and surplus materials that became his property. The surface elevation of spoil areas shall not extend above the surface elevation of adjacent areas. The spoil material shall be placed/spoiled and compacted to a reasonable density as instructed by the Engineer. All spoil areas shall be graded to allow positive drainage of the area itself and of adjacent areas. If required, the spoil area and adjacent

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areas shall be put into condition acceptable for seeding or planting. 4 TOLERANCES 4.1 In those areas upon which any pavement construction is to be placed, the top of the subgrade shall not vary from the design levels by more than 15 mm. The finished levels shall be determined by taking level in a grid of 10 by 10 percent of the measurements exceed the specified tolerance, but are less than 20 mm. 4.2 In areas outside pavement constructions the top of the formation shall not vary from the design levels shall be determined by taking levels in a grid of 20 x 20 meters or less. A lot will be accepted for grade if not more than 10 percent of the measurements exceed the specified tolerance, but are less than 40 mm. 4.3 The size of a lot shall be between 2,500-5,000 m2. 4.4 Any deviation in excess of the above tolerances shall be corrected by reshaping and compaction of the material. GACA/AECOM Representative Remarks:

SSEM QC Representative Sign: Name: Date:

Legend: A=Acceptable; R=Rejected; N/A=Not Applicable GACA / AECOM Representative Sign: Name: Date:

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TRENCHING AND BACKFILLING OF PIPELINES CHECKLIST IC Checklist No.: 085-IC-C-003 ITP Ref. No.: 085-ITP-C-3.0 Sec:

Project: Construction of New Load Center-3 Contract No.: R-15-085-BF-O Facility Name: Drwg. No. / Line No.: Work / item for Inspection: Item

1 1.1 1.2 1.3

1.4

1.5

Activity

Area/Location:

SSE M Engr.

SSE M QC A

GACA/AECOM Representative R N/A

Corr. Sign Off

Remarks

TRENCHING Obtaining permit of excavation Location and layout of area to be excavated Trenches may be excavated manually or with mechanical trenching equipment. Walls of trenches shall be essentially vertical so that a minimum of surfaced is disturbed. Graders, scrapers or bulldozers shall not be used to excavate the trench. The bottom surface of trenches shall be essentially smooth and free from coarse aggregate. Unless otherwise specified, trenches shall be excavated to a design depth for the pipe lines. Trenches for piping and utilities shall not be less than 400 mm nor more than 600 mm wider than the outside diameter of the pipe to be laid therein. Bottoms of the trenches shall be accurately graded with bell holes scooped out to provide uniform bearing and support of pipe and utilities on undisturbed soil throughout their entire length except where other means of supporting pipe are indicated. Rock materials shall be excavated to 150 mm below

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1.6

1.7

1.8

1.9

1.11 1.10 2.0 2.1

2.2

2.3

pipe invert and bed backfilled with fine sand and well tamped in place. When rock excavation is encountered, the rock shall be removed to a depth of at least 0.8 m below finished grade. Rock excavation shall consist of the removal of boulders and detached rock ½ cubic meter in volume or greater, and of all rock in place in ledges or masses which can be removed only by the use of bars and sledges or by blasting. Before any rock is removed the Engineer shall have the opportunity to obtain the necessary data to determine the quantity. The Contractor shall excavate the trenches to a width not less than 0.3 m. At all times during the construction, the trenches shall be kept free of standing water. Grading and elevation conformed to drawing Disposal of excavated material EXCAVATION NEAR EXISTING FACILITIES These trenches shall be excavated manually in order to avoid damages to existing cables and utilities Any damage to existing cables or utilities shall be immediately reported to the Engineer and the relevant Authorities, and shall be promptly repaired or replaced by the Contractor at his own expense and in a manner and with materials as required by the Engineer or the Authorities. If the Authorities required that

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2.4

3 3.1

3.2 3.3 3.4

3.5 4.2 4.3

the repair of damaged cables or utilities shall be carried out by their own workmen or by other Contractors, then the Employer shall be entitled to recover from the Contractor the cost thereof or may deduct the cost from any payment due or that become due to the Contractor. Special attention shall be paid to the sections of existing cables, which have to remain in use or be re-used for intermediate power supply upon completion of the works. Therefore, the Contractor shall determine the exact location of these cables, whether indicated on the drawings or not, before staring any of his operation in a particular area. BACKFILL, PROTECTION AND DISPOSAL OF SURPLUS MATERIAL Backfilling may proceed until all required tests are performed & until the piping systems, as installed, comply with the requirements in the specifications Bedding and fill materials conformed to specifications Pipes are in correct position and restrained in place Check thickness of backfill layers & compaction and compactness test The tolerance of backfill is +25 / -25 mm CLEANING UP OF SITE All areas disturbed by the trenching, storing of dirt, and other work shall be restored to its original condition. The restoration shall include any necessary top soiling, seeding or planting.

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GACA/AECOM Representative Remarks:

SSEM QC Representative Sign: Name: Date:

Legend: A=Acceptable; R=Rejected; N/A=Not Applicable

GACA / AECOM Representative Sign: Nam e: Date :

Page 22 of 23

SSEM-HSE/PERMIT/002/M07-11, Rev0.1, July2011

SHORING WORK PERMIT DATE: ______________________PERIOD: __________________TO:__________________PERMIT NO.:_______________ EQUIPMENTS: _______________________________________________________WORK AREA: ______________________ DESCRIPTION OF WORK:_________________________________________________________________________________

NAME OF THE ORIGINATOR: COMPANY:

DEPARTMENT:

SIGNATURE:

COMPLEMENTARY PERMITS

PERFORMING AUTHORITY

YES

NO

N/A

DRIVING IN UNAUTHORISED AREAS

NAME: SIGNATURE & DATE: CONTACT NO:

CLEARANCE FROM YERP AUTHORITY CLEARANCE FROM ROYAL COMMISSION CLEARANCE FROM OTHER DEPARTMENTS

RISK ASSESSMENT

SAFETY PRECAUTUONS YES

NO

YES

N/A

ELECTRICAL ISOLATION

PERSONAL PROTECTIVE EQUIPMENT (P.P.E) BARRICADES AND WARNING SIGNS

METHOD STATEMENT / JSA

AREA IS SUITABLE FOR CONCRETE REPAIR WORK

ENOUGH ACCESS/EGRESS

ADDITIONAL ILLUMINATION PROPER ACCESS ACCESS/EGRESS CLEAR FROM OBSTACLES FIRE EXTINGUISER / FIRE WATCHMAN LIFE LINES/ SAFETY HARNESS BREATHING EQUIPMENT EMERGENCY RESCUE TEAM AVAILABLE.

SUFFICIENT SCAFFOLDING/PLATFORMS AREA CLEAR FROM COMBUSTIBLE SUBSTANCES ANY OTHER WORKS ADJACENT ISOLATION FROM OTHER WORKS

SLOPING OR SHIELDLING PROVIDED

AREA CLEAR FROM TOXIC GASES

NO MATERIAL KEPT NEAR THE EXCAVATION

EXISTING TEMPORARY OR PERMANENT UTILITIES SUITABLE EQUIPMENT AND TOOLS AVAILABLE

GAS CYLINDERS KEPT OUT FROM THIS AREA

NO

N/A

WORKERS AWARE OF HAZARDS AND PRECAUTUONS TO BE TAKEN

OTHER REQUIREMENTS (IF NECESSARY)

DECLARATION (to be filled by Performing Authority) And Competent Person I, UNDERSIGNED HAVE CHECKED THE AREA AND COMPLIED TO ALL SAFETY PRECAUTIONS AND RISK ASSESSMENT AND WILL CARRY OUT ACTIVITY WITH APPROVED METHOD STATEMENT

NAME:

SIGN:

NAME:

SIGN:

PERMIT VALIDITY (to be filled by Site Manager/Engineer) THE ABOVE WORK HAS BEEN APPROVED AND SHALL BE CARRIED OUT SAFELY. IT HAS TO BE ENSURED THAT THE EMPLOYEE EXECUTING THE JOB HAS A COPY OF THE PERMIT AT ALL TIMES DURING THE WORK.

NAME:

SIGNATURE:

DATE:

PERMIT CLEARANCE (to be filled by HSE/Safety Representative) I DECLARE THAT ALL WORK UNDER MY CONTROL HAS NOW BEEN COMPLETED AND THE AREA HAS BEEN CLEARED AND THAT ALL TOOLS AND OTHER EQUIPMENT HAVE BEEN REMOVED

NAME:

SIGNATURE:

DATE:

PERMIT CLOSED (to be filled by Performing Authority) THE ABOVE WORK WAS COMPLETED SAFELY AND THE WORK PERMIT SHALL BE CANCELLED

NAME:

SIGNATURE :

DATE:

NAME:

SIGNATURE:

DATE:

Yellow- Site

Blue - HSE office

SAFETY DEPARTMENT: White - Client Office Page 23 of 23

Method Statement for Shoring Work

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