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

Figure 18

Surrounding stratum vertical displacement: (a) 1# ⟶ 2# ⟶ 3#; (b) 2# ⟶ 1# ⟶ 3#; (c) 1# ⟶ 3# ⟶ 2#.

(a)

(b)

(c)