This is the data collected by pipe jacking before:
When the soil layer is soft and there are no obstacles, when the soil layer above the pipe top is thick, extrusion or grid pipe jacking method should be adopted;
When the ground settlement must be controlled in cohesive soil layer, the earth pressure balance pipe jacking method should be adopted;
When the ground heave needs to be controlled in the silty sand layer, the pipe jacking method of adding earth pressure balance or mud-water balance should be adopted;
When jacking metal pipes with short length and small diameter, the one-time jacking method of compacted soil layer should be adopted.
Pipe jacking refers to an underground excavation construction method used when tunnels or underground pipelines cross various obstacles such as railways, highways, rivers or buildings.