Study on the Applicability of an Improved Pile-Beam-Arch Method of Metro Station Construction in the Upper-Soft and Lower-Hard Stratum

Figure 16

Principal stress of arches (pa). (a) Stage 5-1. (b) Stage 5-2. (c) Stage 5-3. (d) Stage 5-4.

(a)

(b)

(c)

(d)