Study on the Division of the Affected Zone under Construction Unloading and Its Construction Sequence of the Multiline Parallel River-Crossing Pipe Jacking

Figure 14

Potential fracture surface for typical working conditions: (a)  = 2.0 m (D was 3 m, 5 m, and 9 min sequence); (b)  = 5.0 m (D was 3 m, 5 m, and 9 min sequence); (c)  = 8.0 m (D was 3 m, 7 m, and 9 min sequence).

(a)

(b)

(c)