Research Article

Estimations of the Jacking Forces of Large-Sized Rectangular Jacking Pipes Based on a Displacement Control Method

Figure 2

Pictures of case A1. (a) Jacking head. (b) Installation of machine head cutter. (c) Pipe hoisting. (d) Jacking head reached the receiving well. (e) The head of the pipe jacking machine was detached from the pipe joint.
(a)
(b)
(c)
(d)
(e)