Basrah Gas Company Rehabilitation Of Mt Long-term Project

Method of statement

Basrah Gas Company Rehabilitation of MT long-term project Method of statement of pilling work for the new 2000m3 water storage tank. Company logo and business name

Project name Refrigeration project

Basrah Gas company Contractor logo and business name

Project no. WO-B026/WG 00 33

Albilal group for general contract Facility name :marine terminal (fire water tank pilling work ) Location : on shore

Scale NA

Sheet of sheets 1/16

Document title: Method of statement of pilling work for the new 2000m3 water storage tank.

Ab Rev no

Rev no

Date

Description

Prepared by

Checked by

Approved by

A

-

First issue

Abdullah Hameed

Table of Contents OBJECTIVE ................................................................................................................................ 1

Scope of application …………………………………………… 2 DEFINITIONS ..........................................................................................................................3 REFERENCE DOCUMENTS ...............................................................................................4

RESOURCES .................................................................................................................................5 Personnel .............................................................................................................................5.1 Equipment ........................................................................................................................5.2

Program of work……………………………………………………………………………………6 Preliminary site investigation………………………………………………………………………………………….6.1

setting out the piles ……………………………………………………………………………….6.2 site clearance......................................................................................................................6.3 Sequence of works ……………………………………………………………………………………7

Risk assessment of piling works………………………………………………………………….8 Health, safety, environment requirements ……………………………………………..……….9

Method of statement

1.

Objective This document specifies methods and procedure accordance with construction drawing and adhering to applicable specifications with consideration to local rules and regulations.

2.

SCOPE OF APPLICATION The scope of this document is confined to civil construction pilling works, which are listed below. These include material, machineries, workforce, temporary activities & materials, mobilization and demobilization of the team & stuff assigned to complete the pilling scope. All the pilling activities to be performed in accordance with relevant international codes & standards or recognized good engineering practice

Method of statement

3.

TERMINOLOGY, DEFINITIONS, ABBREVIATIONS

PROJECT

Refrigeration project phase 1

COMPANY

BASRAH GAS COMPANY

CONTRACTOR

ALBILAL GROUP FOR GENERAL CONTRACT

4.

REFERENCE DOCUMENTS

Work pack no.

Work pack title

9500-WGEL-S003-ISGP-G00000- Civil construction work pack for foundation of fire water tank BA-5794-00096

Method of statement

5.

RESOURCES

5.1 Personnel Work will be carried out by qualifies personnel as below 

Civil Engineers.

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Surveyor QA QC civil engineer.



Skilled labors.

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Skilled Equipment Operators

5.2 Equipment In accordance to work requirements, the following machineries and equipment will be used in general:  grinder.  Pile Hammer (hydraulic or diesel).  Crane.  Concrete breaker.  Total station.  Level.  Water level  Welding machine

Method of statement

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6.PROGRAM OF WORK 6.1 Preliminary site investigation

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A preliminary site investigation report shall be maintained for the existing ground levels and the proposed excavation levels exactly in accordance with the lines, levels, grades and curves shown on the plan or as directed as per the approved drawing for earth works.

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As per the site condition all the earth works shall be limited to the area inside the plot boundary.

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The entire are required for construction of fire water tank will be identified and marked with chalk powder (white) and will be barricaded with a suitable hard barricading material with access



The underground utilities shall be identified prior to start the works

6.2 setting out the piles  The surveyor should establish all the control point (through primary datum line) in respect to lines/ grids, lines/cut lines, install and maintain The reference marks, benchmarks, and maintain them as long as required for setting out.

6.3 site clearance  Rock projection boulders or any hard spot, if any, shall be removed to a depth specify by BGC supervisor below the formation level

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Method of statement  

7.Sequence of works  The pile driving rig from Delmag company .  Data sheet for pile driving rig D30 .

Method of statement

 Establish rig on site

Method of statement

 The length of pile is 13 m and two piles have to be driven for each location = 26 m and the remaining above ground portion is 1 meter to be demolished later on and tie rebar with foundation .

 Before driving of piles under,the test pile

has to be done 6 meter from edge of foundation, and send the report to client .

 Check the pile position, locations, the surveyor will mark the corner of the pile and the center point by using a short bar in order to identify the location of the corners and the center line by total station equipment we will start from pile no.7 to pile no.14 (the red colored pile) as a first stage for both driven and survey phase. The next stage will be to the south side of this picture. we will follow this plan in order to reduce the obstacles that might face us in the field during the installation phase. also the advantageous of this plan is to get paralleled line of pile which in turn it will minimize the survey work.

Method of statement

 Pitching of the pile is carried out by looping the chain around the pile approximately 1 m from the end and winching up into the helmet of the hammer by rig operator  Pile is then guided to pile clamp by the assistant on ground

 Set up piling rig with the pitched pile over the marked position then the driver placed the pile onto the ground

 Assistant on ground checks the pile is plum with the level

 Then the driver lowers service winch and proceeds to operate driving hammer at low drop height until the pile has safely entered the ground

 Assistant will carry the verticality check if necessary

 Pile is then driven to the required height which is one meter above the ground for each phase of pitching process. and as the picture below

Method of statement

 The pitched pile dose not satisfy the designated depth in the drawing in our case. Then we have to pitch another pile, this pile will be tied to the bottom of the pitched pile by welding plate to the second plate for all four sides side as shown below.

 Jointing is carried out by placing the pitched pile over the driven pile, removing dirt that cover of the pitched pile by the assistance And lowering of the pitched pile on the top of the driven pile by the rig driver with direction from the assistant. Jointing in our proposed tie connection  The pile is checked for the vertical plum again. Then the service

Method of statement

 winch is lowered and removed  Driving is carried out by using same procedure.  Once the driven works is completed, and the pile is in the exact level pile head breaking works will commence  Marking will be made on each pile periphery at pile cut off level. And cut with grinder will be made on the marking to prevent excess breaking of concrete below the cut off level  Chipping/breaking will be done by air compressor and pneumatic concrete breaker from the top of existing pile to the cut off level. Suitable scaffold shall be provided for breaking above 1 meter  Concrete debris will remove to the approved dumbed area  The area will fine level and the sub base will be compacted manually with plate/ mini roller compactor to the required degree of compaction.

8.Risk assessment for piling operation Hazards  failure to check the manufactures instruction  overheads power lines  underground services not identified  inadequate operator training  pitching of new pile  possibility of rig overturning due to unstable ground surface or working near excavation  joining pile to existing pile if deeper pile is necessary  unexpected visitors entering the site

Method of statement

control measures  always check the manufacture handbook for instruction regarding pilling rig  always carry out a walk through survey of the site before bringing the rig into the operation zone  inspect all the site maps relating to the ground works to identify if there are any underlying services present that need to be highlighted  all the driver will be trained and competent to operate the pile rig  when pitching a new pile, the assistant must ensure that the chain is not twisted by using looping technique  The ground on which the rig has to operate must be inspected so as to ensure its stability and that excavation don’t pose a threat of overturning to the operatives  The joining of the pile must have done safely and the assistant to the pilling rig operator must be wearing gloves and he does not tray to align pile by feeling with his finger, he must remove the plastic dirt covers and then he directed the rig operator to lower the pitch pile on

 the top of driven pile and after joining process can proceed Only the authorized person may operate in the vicinity of piling rig

Method of statement

9. SAFETY & Environmental All pilling personnel and supervisors will attend a daily pre-pilling Toolbox Talk .A specific Risk Assessment will be prepared by the Risk Assessment Team ranking the hazards associated with the pilling works and control measures to be taken to mitigate the hazards to an acceptable level.The pilling work will have an approved Job Safety Analysis (JSA) identifying the potential hazards and control measures that will be implemented to protect people and environment. The JSA will be used by the pilling Supervisor as the basis of conducting his Pre-Task meeting and his daily Tool Box Talk (TBT).