Page 357 - Trenchless Technology Piping Installation and Inspection

CHAPTER 8

Inspection and Quality

Assurance/Quality

Control for Trenchless

Installation and

Replacement Methods

8.1 Conventional Pipe Jacking

8.1.1 Introduction
Conventional pipe jacking is defined as a system of directly installing
pipes behind a shield machine by hydraulic jacking from a drive shaft
such that the pipes form a continuous string in the ground. Usually
personnel are required inside the pipe to perform the excavation
[such as operating a tunnel boring machine (TBM)] or spoil-removal
process. The excavation can be performed manually or mechanically
(see Fig. 8.1).

8.1.2 Materials
Pipe
The type of pipe used for the pipe-jacking method must be capable of
transmitting the required jacking forces from the thrust plate in the
jacking shaft to jacking field or TBM. Steel reinforced concrete (RCP),
cenrifugally cast fiberglass-reinforced polymer mortar (CCFRPM),

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