Jacking Steel Pipe Spiral Steel Pipe For Water Gas And Oil Transport

Jacked Pipe Spiral Steel Pipe

Pipe jacking is a trenchless method of installing pipes, conduits, and utility corridors by applying a force which pushes the pipe through the ground while controlled excavation takes place at the face.

The pipe jacking process begins with excavating relatively small entry and exit pits at the beginning and end of the pipe installation (usually at manhole locations). These pits are just large enough to accommodate the tunneling equipment and construction personnel. Once the pits are excavated, the hydraulic jacking rig and microtunneling machine are put into position.

The hydraulic jacking rig then applies a force that "pushes’" the tunneling machine through the wall of the entrance pit and into the ground. Once the machine reaches a predetermined position in the soil, a segment of pipe is lowered into the entrance pit behind the jacking rig and the microtunneling machine. An adaptor ring is typically used to link the pipe segment and the tunneling machine.

Next, the jacking rig, once again, applies a force that forces both the pipe and machine forward on their way to the exit pit. This process continues, with several pipe segments being jacked in sequence until the cutter head reaches the exit pit.