Definition - What does Jacking Pipe mean?
A jacking pipe is a high compressive strength pipe that is jacked into the earth using the pipe jacking technique. The pipes are jacked through the soil by using hydraulic jacks that drive the shield at the front of the pipe string. Pipe jacking is a trenchless construction method that is carried out from a launch pit positioned at the depth at which the pipe is to be installed. The method is very useful when pipeline installation has to be carried out in places where surface disruption is to be minimized such as under roadways, highways, runways and railways.
Trenchlesspedia explains Jacking Pipe
Microtunneling and pipe jacking are two of the methods of trenchless construction that utilize jacking pipes. The process involves digging a launch shaft for placing the required machinery and equipment that will drive the pipe inside the soil. Also known as thrust pit, a thrust wall is installed at the back of the pit to gain the required thrust for the jack to push the pipe positioned behind a shield. As the digging proceeds the pipes are pushed in behind as a string. The installed pipe is watertight and structurally sound with flexible gasketed joints. The receiving shaft at the other end allows the shield to be retrieved at the other end as it the pipeline length is completed.