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Code of Practice for Pipe Bursting suiting Indian Condition

Table of Contents

PREFACE

 

Sewerage and water infrastructure and other utility services represent a significant investment on the part of most municipalities. For well over 100 years, the distribution networks for utility services have been located underground in pipes or ducts that are laid, repaired or replaced by trenching from surface. In cities and urban areas, these distribution networks are located underneath the roads. This often makes access difficult, particularly in areas congested with traffic and buildings. When pipeline infrastructure is not well maintained, inefficiencies occur. For example, in water distribution system, this can lead to leakage and possible water shortages. In sewage system, cracked and damaged pipes can cause wastewater seepage, leading to contamination of ground water apart from other host of problems. These problems often give rise to related health and environmental impacts and are needed to be corrected at an early age.

Perhaps the largest share of the trenchless market is represented by the requirement to rehabilitate defective pipelines with some residual structural and physical life, which can be used as a structure for the new line. Examples of rehabilitation techniques include Cured-in-Place Lining (CIPP), Close-Fit Lining, Slip-lining, and Spray Lining, all with their own-patented variations, as well as various other localised repair techniques. Variations relate to the material used, wall thickness provided to offset structural or physical defects, the rate of rehabilitation, and the minimum time of shut-down for the existing service.

Perhaps the largest share of the trenchless market is represented by the requirement to renew or rehabilitate defective pipeline because of its economical and technical efficiency. Because of its technical and economical efficiency the total pipe network of city and urban areas are now renewed by means of the dynamic/pneumatic pipe bursting method.

Pipe bursting is an eco-friendly trenchless method which replaces existing host pipes by bursting them from inside and then displacing the fragments into the surrounding soil while simultaneously pulling in new utility pipe of the same or the larger diameter into the void created. As the pipe bursting utilizes the space and the route already occupied by the old pipe main or service line, they are ideal for the renewal work which is having an ever increasing/growing demand. Since the continuous development and improvement in the technique it is now applicable for wide variety of pipe materials.

The Code of Practice for Pipe Bursting suiting Indian conditions has been developed to assist the project owner and the service provider in attaining the desired outcome of pipeline renewal process through Pipe Bursting. The condition proposed would help in renewing the pipeline with desired properties and strengths if followed properly. The conditions have been developed in an attempt at standardizing the technique and the procedures so that procurement process could be more transparent and the product could be cost effective.

As with all codes of practices, this would be reviewed and updated with times and the user/reader is invited to send their comments for further development of the code.

 

Prof. Niranjan Swarup
Executive Director
Indian Society for Trenchless Technology


 

Table of Contents

 

SECTION 1 GENERAL

1.

Scope

6

SECTION 2 Terminology

2.

Terminology      

7

SECTION 3 Design, Subsurface Investigation, Information Review and Field Reconnaissance

3.

Design

9

SECTION 4 Pipeline Investigation
4. 4.1      Subsurface Investigation
11
 

4.2      Information Review

11
 

4.3      Field Reconnaissance

11
 

4.4      Survey of the underground conditions in the area of the host pipe

11
SECTION 5 Materials, Allowable Forces and Pipe Dimensions
5. Materials  
  5.1      Pipe
13
  5.2      Allowable Forces
13
  5.3      Pipe dimensions
13
  5.4      Depth of cover
14
  5.5      Distance to adjacent parallel pipes
14
SECTION 6 Pipe bursting equipment and its selection
  6.1      Pipe bursting equipments 
15
  6.1      Selecting the pipe bursting equipment 
15
SECTION 7 Contractors qualifications, Quality assurance criteria and Performance Specification
  7.1      Contractors qualifications 
16
  7.2      Quality assurance criteria 
16
  7.3      Performance Specification 
16
SECTION 8 Construction and safety, Protection, and temporary stoppage of flow
  8.1      Construction and Safety 
17
  8.2      Protection 
17
  8.3      Temporary Stoppage of Flow 
17
SECTION 9 Work Site Restoration and pollution control measures
  9.1      Work Site Restoration 
18
  9.2      Pollution Control measures 
18
SECTION 10 Performing pipe bursting
  10.1      Planning phase 
18
  10.2      Host pipe 
18
  10.2.1   For Pressure pipes
18
 

10.2.2   For Sewage / Drainage pipes

19
  10.3      New pipe
19
SECTION 11 Contract
 

11         Contract Responsibilities

20
SECTION 12 Pipe bursting method
 

12.1      Static pipe bursting

22
 

12.2      Dynamic/pneumatic pipe cracking

22