Master Casing Pusher Mean?
A master casing pusher is the front section of a boring machine that distributes the thrusting force of the hydraulic cylinders to the casing and forms the outside of the spoil ejector system. This part is used to ensure that the casing is pushed straight into the bore and that the integrity of the joins are maintained.
Also referred to as a casing pusher.
Trenchlesspedia Explains Master Casing Pusher
A microtunnel boring machine uses hydraulic jacks to provide the force to drive the cutting head through the earth and to drive the casing segments into position behind the cutting head. The master casing pusher absorbs the power from the individual jacks and transfers it onto the circumference of the pipe casing so that there is no uneven force applied. There are significant stresses placed on the master casing pusher due to the force of the hydraulic jacks.