Also known as DriveDesignation of the pipe installed from a jacking shaft to a reception shaft. Pit, but more usually associated with “launching” an Impact MolingMethod of creating a bore using a pneumatic or hydaulic hammer within a casing, generally of torpedo shape. The term is usually associated with non-steered or limited steering devices without rigid attachment to the launch pit, relying upon the resistance of the ground for forward movement. During the operation the soil is displaced, not removed. An unsupported bore may be... tool.
