Stress Performance Evaluation of Shield Machine Cutter Head during Cutting Piles under Masonry Structures

Figure 8

Deformation of buildings at various critical moments of shield cutting pile group construction. (a) Deformation of buildings when shield tunnels are not under construction. (b) The left-line shield cutter head starts to cut the pile group composite foundation. (c) Left-line shield tail separated from pile group composite foundation. (d) The shield tail of the left line is away from the pile group composite foundation for 15 days.

(a)

(b)

(c)

(d)