Jacking Pit

Definition - What does Jacking Pit mean?

A jacking pit is a hole dug in preparation for the installation of a tunnel or casing for the machinery to fit into. The jacking pit's purpose is to line up the equipment at the correct grade and line. The pit must have sufficient structural bracing installed to keep the integrity of the hole. The pit may also include a thrust wall in order to disperse the load of the operation.

Also termed entrance pit, bore pit or jack pit.

Trenchlesspedia explains Jacking Pit

Jacking pits vary in size depending on the diameter and length of the casing and the depth of the boring. For drilling methods such as in auger boring, where there is no way to steer the auger, the jacking pit becomes critical to a successful and accurate bore as it serves to put the boring machine on the needed line and grade. Typically, there will be one dug at both the entrance and exit of the bore.


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