Chapter: Civil : Construction Techniques Equipment Practices : Sub Structure Construction

Pipe Jacking

In tunnels of damages above 2m men and machines worked the tunnel phase exacting and providing soil support to the excavator soil by erecting the lining.

PIPE JACKING

In tunnels of damages above 2m men and machines worked the tunnel phase exacting and providing soil support to the excavator soil by erecting the lining. The tunnel diameter becomes small it becomes difficult for workers to carry out soil excavation of in erect the tunnel lining system with in the tunnel shield For diameter in the range of 0.5m to 1.5m it is more efficient to excavate the soil by drilling systems controlled from a shaft or a pit to push the tunnel lining segment from the shaft or pit these techniques are often referred to us pipe jacking or micro tunneling techniques and equipments

Pipe jacking refers to a technique in which a man in a sitting or crouch position, user's epic and shovels to excavate tunnel face and the pipe is jacked forward from a shaft using hydraulic jacking system

Horizontal auguring refers to a similar technique in which the man is replaced by a horizontal continuous flight helical auger

INSTALATION

The pipe sections are moved forward by hydraulic jacking and the miniature TBM derive its reaction from these section

Pipe segments of length 1 to 3 diameters 0.5 to 2m can be jacked into the soil using reaction from the concrete wall erected at the rior of jacking pit.

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Civil : Construction Techniques Equipment Practices : Sub Structure Construction : Pipe Jacking |