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Trenchless Training Theme Note
National Sewer Rehabilitation Training
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National Sewer Rehabilitation Theme Note

Today Utilities providing sewerage and drainage services are faced with unprecedented requirement for developing and managing subsurface networks due to increasing urban loads. The requirement is being accelerated more due to Jawaharlal Nehru National Urban Renewal Mission (JnNURM) projects. Growth rate of sensitization about Trenchless amongst working engineers of various municipal bodies is quite low due to non-availability of information and details of the latest developments in the sector. Result is that such several pipelines are left to brave the forces of nature without proper maintenance leading to the destruction of network which otherwise could have been protected with lesser effort earlier. The need of the hour is proper sensitization and education of operating engineers from these utilities.

With a view to above IndSTT is embarking upon a nation wide training program for Sewer Rehabilitation Works titled 'National Sewer Rehabilitation Training (NSRTJ'. Under the program, a series of 63, two day long training workshops are being organized in 63 different JnNURM cities in three phases. They would be introductory courses on Trenchless for the Municipal and other city authorities' engineers developing and managing utilities in JnNURM cities.

Program Details

The first pase is planned for Type A cities where Civic Engineers from the specific city and the near about Type B and Type C cities would also be invited to participate. Subsequently in the next phase the program would shift to Type B cities where Engineers from specific cities and the near about Type C cities would be invited. Finally in the third stage it will move to Type C cities for their engineers and engineers from the near about areas. These workshops will help sensitizing the executing engineers and help promoting Trenchless applications across the nation.

Program Structure

Workshops are structured to have five main sections, viz. Introduction to Sewer Rehabilitation, Initial Pipeline Surveys, Defect Coding & Rehabilitation Planning, Rehabilitation Methods, and Trenchless Rehabilitation & New Construction Methods. A detailed structure of the course is as follows:

1. Introduction to Sewer Rehabilitation

1.1 Sewer Performance Requirements;
1.2 Performance Assessment;
1.3 Rehabilitation Prioritization

2. Initial Pipeline Surveys

2.1 Introduction to Pipeline Condition Assessment;
2.2 Surveying - Hydraulic, Environmental, Structural, & Operational;
2.3 Introduction to Subsurface Utility Engineering;
2.4 Flow Monitoring, Infiltration and Inflow;

3. Defect Coding & Rehabilitation
3.1 Sewer Defect Codes - Need and usage;
3.2 Basics of Coding Principles; 3.3 Internationally Practiced Defect Code Definitions;
3.4 Condition Reporting.
3.5 Solution Development.

4. Rehabilitation Methods

4.1 Repair
4.1.1 Restoration Process
4.1.2 Injection Process
4.1.3 Sealing Process

4.2 Renovation
4.2.1 Coating Process
4.2.2 Lining Process

4.3 Replacement
4.3.1 Open Cut Method;
4.3.2 Trenchless Methods;

Trenchless Rehabilitation & New Construction Methods
5.1 Trenchless Rehabilitation Methods
5.1.1 Cured-In-Place Pipe;
5.1.2 Sliplining;
5.1.3 Close fit Pipe;
5.1.4 Spray Lining;
5.1.5 Grouted-in-Place Lining;
5.1.6 Thermoformed Pipe;
5.1.7 In-Line Replacement;

5.2 Trenchless New Construction Methods
5.2.1 Moling;
5.2.2 Pipe Ramming;
5.2.3 Horizontal Directional Drilling;
5.2.4 Pipe Jacking;
5.2.5 Microtunneling;

5.3 Contractual Issues
5.3.1 General Conditions of Contract;
5.3.2 Consultancy Contracts;
5.3.3 Specifications for Trenchless Techniques;
5.3.4 Code of Practice Suiting Indian Conditions - HDD;
5.3.5 Code of Practice Suiting Indian Conditions - CIPP;
5.3.6 Schedule of Rates for Trenchless Techniques;
5.3.7 Safety issues in Subsurface Construction.

Other Logistics

Program would be conducted by IndSTT jointly with associate technology providing organizations so that promotion of specific technologies of interest can be done. It will also help to develop undertading and acceptance of the products/services in the identified sector in the workshop city. Network development for the participants is another aim which ultimately would lead to enhancement in the business volumes in the identified technologies. In addition to above there can be few more possibilities that can be explored and matured in due course. Course Promotion is to initiate by the last week of March 09 and the first phase of workshops are expected to be organized by May/June 2009. IndSTT is currently inviting Trenchless Stakeholders to consider "joining the NSRT program as an associate of IndSTT. In case of interest readers can communicate to the Executive Director, IndSTT for participating in such programs.