Saudi Binladin GroupPCM Division (IS)

METHOD STATEMENT FOR CONSTRUCTION OF DUCT BANK UNDER

THE EXISTING CULVERT REV. 01

Contract Number : 101/2496MAIN CIVIL WORKS

Date : 10 MAR 2007 Page 1 of 2

1.0 PURPOSE

The purpose of this method statement is to outline the procedure for the

construction of duct bank under the existing storm water concrete culvert.

2.0 SCOPE OF WORK

The scope of work includes excavation, blinding, rebar fixing, conduit fixing,

formworks installation, supporting of existing culvert, concrete coating, and

backfilling.

3.0 WORK PROCEDURE

3.1 The basic principle for the construction of this duct bank is to do

the construction at one time with concrete masonry support at

intervals shown on the sketch, SK-DB-01 sht 1 & 2.

3.2 Excavate a portion below the culvert – Carry out manual excavation

under the existing culvert at location of the support. Excavation of

the second support location will proceed after the installation of the

first support.

3.3 Install temporary support for the culvert – Install temporary support for

the concrete culvert at locations shown on attached SBG sketch SK-

DB-01 sht 1 and 2. The support will be made of concrete masonry

blocks or concrete 100 mm thick as shown on the sketch. The

support will be at 9 locations shown on the sketch so that the

unsupported length of the culvert is only 900 mm. The concrete or

masonry block support will remain in place even after construction

of the duct bank.

3.4 Continue excavation – After installation of the supports, continue

excavation in between the support. This will be done by manual

excavation.

Saudi Binladin GroupPCM Division (IS)

METHOD STATEMENT FOR CONSTRUCTION OF DUCT BANK UNDER

THE EXISTING CULVERT REV. 01

Contract Number : 101/2496MAIN CIVIL WORKS

Date : 10 MAR 2007 Page 2 of 2

3.5 Install soil improvement and blinding – after excavation is completed,

proceed with the soil improvement and blinding as per project and

specification requirement.

3.6 Fix bottom rebar & PVC conduits – Fix rebar and conduits after blinding.

Spacing to be in accordance with the drawings and related documents.

3.7 Fix Formworks – Fix formworks for the duct bank.

3.8 Pour the duct bank – Prior to pouring, request for quality control

inspection and obtain pour release then proceed with pouring.

3.9 After the duct bank is cured, carry out coating of the duct bank. After

coating, backfill the portion under the culvert up to the top surface of

the duct bank and extend up to the bottom of the culvert.

4.0 QUALITY CONTROL (QA/QC)

All stages of work and testing shall be documented as per the approved Inspection and Test Plan.

5.0 SAFETYExecution of all the works shall meet with the relevant codes and practice for

Site Health and Safety as detailed in the approved safety plan.

Risk assessment attached