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Tunneling is describe as pipe jacking when the utility being installed is set in the shaft and jacked into place. The variety of items that can be pipe jacked includes Reinforced Concrete Pipe (RCP), Reinforced Concrete Box (RCB), Arch Pipe, Fiberglass Pipe, and Steel Casing. These items being installed can either be a primary liner or the carrier pipe.
RCB being lowered into shaft
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Pipe jacking is best suited for cohesive soils. Upon completion of a pipe jacking operation, the outside of the pipe can be grouted as needed. The face of a pipe jacking tunnel can be excavated through Hand Tunneling or Machine Tunneling (see Hand Tunneling and Machine Tunneling).
Conveyor, rail and bucket setup
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