Download - MST-PL-04 GRP PIPE.docx
ABU DHABI FUTURE SCHOOL PROGRAM PHASE -2 PACKAGE 4 KG School Al-Falah and Al-BahyaMethod Statement
Method Statement for installation of GRP Pipe (Underground).
ClientAbu Dhabi Education Council
ConsultantDeewan Architects and Engineers
ContractorUnited Engineering Construction
Issued on 31 st July , 2013
Author Reviewed by Approved by MSRev. Name Date Name Date Name Date No.
0 FAISAL WAHEED 01-08-2013 ANAS RABAE 01-08-2013SAID
ABUGHOSH01-08-2013
ASEM-MST-PL-01 REV00
INSTALLATION OF GRP WATER PIPE (UNDERGROUND)
TABLE OF CONTENTS
1. Purpose2. Scope3. Legislation and Code of Practice4. Reference5. Definitions6. Resources 6.1. Equipment 6.2. Safety of Equipment’s7. Safety Precautions 7.1. Construction Hazards 7.2. Personal Protective Equipment 7.3. Safety Training and Emergency procedures 7.4. First Aid8.Detailed Construction Sequence (Methodology) 8.1. Procedure9.Construction Program 9.1 Housekeeping 9.2 Protection of Executed Works 9.3 Responsibilities 9.4 Records10.Inspection and Testing11.Related Forms12.Attachments
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INSTALLATION OF GRP WATER PIPE (UNDERGROUND)
1. Purpose
This document describes the methodology and procedure of installation of GRP pipes for Abu Dhabi Future School Program Phase 2, Package 4, and to ensure that all concerned persons are familiar with the sequence of activities, utilization of resources, and execution of the works in compliance with applicable Safety and Quality Procedures, and Project Documents and technical Specification.
2. Scope of Works
This document covers the following scope of works:
This method statement is intended to outline the activities and the methods used installation of installation of GRP pipes for Abu Dhabi Future School Program Phase 2, Package 4. All activities will be carried out in accordance with the contract details and in full compliance to the Contract Specifications and Documents. All work within the rights-of-way of the standards and specifications will be done in compliance with requirements issued by authorities.
3. Legislation and Code of Practice
All related codes and standards referenced in the Contract Specifications
4. Reference
Contract Specifications Section 21- 10- 50 clause 2 sub clause 2.1.10 Approved Drawings ADSSC standards.
5. Definitions
Client : Abu Dhabi Education CouncilConsultants : Deewan Architects and EngineersContractor : United Engineering Construction
6. Resources
6.1. Equipment / Tools
DESCRIPTION
Tool Box
Measuring Tape
Hack Saw
Spirit Level
Excavator
Roller/Plate Compactor
Solvent Cement
6.2 Safety of Equipment’s
Necessary measures will be taken for the safety of the equipment and any other works affected by the works subject of this document. Relevant entities which might require protection include any such works in the vicinity of the area of work or on the service access or discharge path.The construction team will ensure that any such requirements are documented.
7. Health, Safety & the Environment
7.1 Construction Hazards (tick as appropriate)
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INSTALLATION OF GRP WATER PIPE (UNDERGROUND)
Corrosive OxidizingHighly
flammableExtremely flammable
ToxicHighly Toxic
Irritating Harmful
Explosive
Danger for the
Environment
Constrained Space
Slippery Surface
Danger of Electrocutio
n
Falling from
HeightOther
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____________________
The hazards identified above will be controlled under the overall Project Safety Plan which is a separate document communicated to all parties on the project.
7.2. Personal Protective Equipment (tick as appropriate)
The works subject of this document requires that the following PPE be used:
Safety Precaution
Helmet Hi-VizEye
ProtectionFace
ProtectionMask
RequiredRespirator Required
Ear Protection
Gloves Required
Safety Shoes
Required
Protective Clothing
Safety Harness
Equipment Guards
Lifejacket Other
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7.3. Safety Training and Emergency procedures
Before commencing any works, all employees will attend a site safety induction training to ensure all safety measures are understood and implemented and to cover specific procedures in case of emergency. If necessary, practical training exercises will be conducted on escape routes, signage, evacuation and rescue.
7.4. First Aid
Prior to the commencement of work, arrangements will be made for medical facilities and medical personnel to be available from prompt attention to the injured person. The contractor’s vehicle assigned to the job site will be used for transporting the injured person to the first aid station and to the nearest hospital when required.
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Name of On-Site First Aider/s:
First Aid Box Location:
Location of Nearest Hospital:
First Aid and Medical Supplies available at site:
Potable Water Ice Cubes
10x6cm Sterile Gauze Pad 4x6cm Gauze Roller Bandage
10x10cm Sterile Gauze Pad 8x10cm Gauze Roller Bandage
Large Sterile Gauze Pad 10x12cm Gauze Roller Bandage
Burn Dressings 5cm Elastic Bandage
7.5cm Elastic Bandage 10cm Elastic Bandage
Triangular Bandage Barrier Device for CPR
Adhesive Skin Tape Adhesive Leucoplast Tape
Emergency Blanket Safety Pins
First Aid Scissors Tweezers
Disposable Gloves Instant Cold Pack
Non-prescription Medicines (Aspirin, Ibuprofen, Acetaminophen)
First Aid and Burn Spray, Deep Heat Spray
8. Detailed Construction Sequence (Methodology)
8.1. Procedure
8.1.1 Handling for pipes:
During transportation pipes must be handled with care. Do not drop or drag pipes especially on hard
surfaces. Unloading of pipes to be carried out by care.
When mechanical lifting equipment is to be used, no metallic slings, hooks or chains should use in direct
contact with the pipe. Ropes or web slings are preferred, as they will not damage the pipe wall.
8.1.2 Storage on site
Pipes should be stored on a flat dry level surface free from sharp projections, stones or other objects
likely to cause point loading or pipe deformation. Timber supports spaced 1.5m apart along the pipe can
be used to support the pipes. The width of the stack should not exceed 3m.
Fittings will be stored in sheltered conditions in the boxes as supplied to protect them from weathering
and accidental damage.
8.1.3 Trench Formation
The trench shall be excavated by a Hand/Back hoe Loader, after the area of excavation is identified, The
formation of the trench must consist of stable, uniform and smooth soil devoid of irregularities for direct
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INSTALLATION OF GRP WATER PIPE (UNDERGROUND)
laying of pipes, Compaction for the full width of the pipe trench shall be to at least 95% Modified Proctor
Density.
The excavated material shall be placed on one side of the trench leaving the other side clear for pipe
handling, and the bed of the trench should be smoothened out evenly to provide a uniform support for the
pipe.
While excavating 2 No. of labors should be present with the excavating machine to avoid any damages that
can occur while excavating to any of the underground services.
8.1.4 Sequence of Installation
a. Mark routing of pipe work according to approved shop drawing.
b. Install piping as per approved shop drawing.
c. All horizontal drainage piping shall be installed with 2% slope unless otherwise indicated.
d. Install fittings for changes in direction and branch connections with appropriate branches, bends and
long sweep bends
e. Use long turn double Y-branch and 1/8 bend fittings if two fixtures are installed back to back or side
by side with common drain pipe.
f. Do not change the direction of flow more than 90 degrees.
g. Use the proper size of standard increasers and reducers if pipes different sizes are connected.
h. Reducing the size of drainage piping in direction of flow is prohibited.
i. Install encasement on underground piping according to ASTM A 674, AWWA C105/ A 21.5 and
ADSSC standards.
8.1.5 Raft Slab
a. After getting the all civil clearances (including foundation layout, levels, blinding, water proofing & steel
fixing), prepare the pipe length required as the approved shop drawing for the laying through the steel
fixture.
b. Make sure the pipe slope levels are as per the approved shop drawing otherwise as indicated.
c. Pipe to be tied properly as maintaining slope according to approval.
d. Precede necessary steps of installation sequences with leak testing as explained in technical specification.
e. Prior to the concrete filling make sure all the installation and testing are as per the approvals.
8.1.6 Pipe works
Measure length of pipe required, making due allowance for any pipe fittings to be used. Cut the pipe to
the measured length. Ensure that the ends are cut square and clean all burs.
The spigot and socket to be jointed should be carefully examined for any damage which could impair the
jointing procedure.
The spigot insertion depth should be measured as the depth from the mouth to the shoulder of the socket.
The insertion depth should be marked on the spigot using marker.
The jointing system for drainage piping system is “Solvent weld”.
The mating areas of the spigot and the socket should be thoroughly cleaned using the pipe cleaner and a
clean rag.
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8.1.6 Leak Testing
a. The piping system to be tested shall be closed by plugging and blanking all openings in the system in
an approved manner.
b. Suitable plugs are inserted at the lower end of the drain or sewer and at the head of any connections.
c. A suitable bend together with a vertical length of pipe is fitted at the head of the sewer or drain to
provide the necessary test head. The system then filled with water.
d. Close openings in piping system and fill with water to point of overflow but less than 10-foot head of
water (30 KPa) from before 15 minutes before starts to completion of inspection. Water level must not
drop and inspect joints for leak.
e. The sewer or drain under test should be left filled with water for min 2hours.
f. So ensure that all piping and joints are no leak.
g. During the water test, precautions should be taken to prevent any movement of the drain or sewer.
h. All ends shall be plugged after completion of test to protect from debris.
i. After successful testing & Inspection of pipe work, covering of pipe work can proceed as per approved
drawing details.
j. All piped pressure systems shall be hydraulically tested to at least 1.5 times the operating pressure. Pressure shall be maintained for at least 24 hours.
5.6 Backfilling
I. Embedded in concrete
a. Place the pipe in the containment with pipe support members
b. Maintain the slope properly (2%) or as shown on drawing
II. Buried in soil
a. Backfilling shall take place immediately after the entire test has been approved by the Engineers b. Provide warning tapes or detectable warning tapes before final back filling. c. The excavated material shall be used as backfilling material and backfilling material shall be uniformly
wetted with water. The backfilling shall be done in layers that do not exceed 300mm of well compacted layer which the compaction will be done by a plate compactor for the said layer each layer of backfilling shall proceed after the Engineers approval for the compacted layer is given for the previous layer
9. Construction Program
As per main program
9.1 Housekeeping
The work area shall be maintained neat and tidy as reasonable practical at all times.
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9.2 Protection of Executed Works
Executed works in areas were other works are still being carried out shall be protected as per the contract requirements.
9.3 Responsibilities
PositionOverall Resp. Supervise Perform Short Description
Project Manager Construction Manager Project Engineer Site Manager Site Engineer Land Surveyor Safety Engineer QA/QC Engineer MEP Coordinator General Foreman Foreman Charge hand Labourer Helper
9.4 Records
In accordance with the Quality Management System, the following records will be maintained as documentary evidence of the establishment of this method statement:
Records to be retained Responsibility Minimum Retention Period
Disposition
Work Notification( If required)
Site Manager As per ContractRequirements
Request for Inspection( RIW )
QA/QC Engineer As per ContractRequirements
10. Inspection and Testing
In Process works shall be monitored for quality of workmanship and fabrication against approved shop drawings and standards by the relevant supervisor.
All works shall be inspected for conformance to specification. The inspection formats shall be used in accordance with the requirements of the main contractor UNEC. Raise the inspection for installation of GRP water pipe.
11. Related Forms
As per required forms
12. Attachments
Risk Assessment
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