Drive Shaft Mean?
A drive shaft is also known as a jacking shaft and describes the excavated pit into which the jacking equipment is placed in order to carry out trenchless construction or rehabilitation activities. Jacking of new pipes or replacement pipes into the bore is done from the drive shaft. When the pipe reaches the receiving shaft, the installation is complete.
Trenchlesspedia Explains Drive Shaft
Pipe jacking involves the excavation of drive shafts and receiving shafts in order to facilitate the placement of the equipment and the jacking activities. In many cases, the drive shaft will have a thrust wall established at the rear of the shaft to provide a platform against which the jacks can press as they push the pipe segments into the ground. New pipe segments are lowered into the drive shaft, onto the equipment and then jacked into the ground. Once the segment is installed, the jack is withdrawn, the next pipe segment lowered into the drive shaft and the process begins again.