METHOD STATEMENT FOR PIPE JACKING WORK

INTRODUCTION

1.1  Introduction

The Vung Ang II thermal power plant is part of the Vung Ang thermal power center and is the second complex of the coal-fired electricity generating plant located in the Vung Ang industrial zone, Ky Loi commune, Ky Anh district, Ha Tinh province in Vietnam. Vung Ang II will be constructed adjacent to Vung Ang I which is already in operation. It consists of two turbines with a total capacity of 1,200 MW. Both will be fueled by imported anthracite, hard coal.

1.2       Abbreviation and definition

The Owner         Vung Ang II Thermal Power LLC

The Contractor   DHI-SCT Joint Venture

HSE                    Health, Safety and Environment

MS                      Method Statement

RA                      Risk Assessment

PPE                     Personal Protective Equipment

QA/QC                Quality Assurance/Quality Control       

1.3       Scope of work

To install the CW underground pipeline of Vung Ang 2 Thermal Power Plant at crossing area with Vung Ang 1 belt conveyor by pipe jacking pressing method.

1.3.1  Constructing of 04 CW pipelines with Diameter 2700mm

 

Number of CW pipelines can be changed with 2 pipelines (DN 3700) at the detail engineering stage

2          OVERVIEW

CW pipe DN2700 to install underground by Pipe jacking method.

 

Plan View of Construction Location

Table 1.1 Contents of work

No	Items	Method statement	Quantities	Note
A	S haft construction
1	Driving and extract steel sheet pipe Larsen IV	Use Silent Piler(100-150T)
2	Soil improvement for bottom of shaft	Jet Grouting D1800	2shaft
3	Soil improvement for entrance of launching and arriving shaft	Jet Grouting D1200
4	Strut installation	Lifting and installing
5	Soil Excavation	Use excavator
B	Pipe jacking construction
1	Supply DN2700 pipe
2	Installation CW pipe DN2700	Pipe Jacking	40m

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