Field Experimental Study on Mechanical Properties of Frame Support Structure Composed of Subway Foundation Pit Retaining Pile and Steel Strut Rigid Joint

Figure 14

The collapse process of the foundation pit. (a) Small soil blocks on the side wall fall. (b) Many soil blocks on the side wall fell. (c) The middle of the foundation pit begins to topple (north view). (d) The middle of the foundation pit begins to topple (south view). (e) The waist beam on the second floor on the north side fell. (f) Falling failure of second floor strut.

(a)

(b)

(c)

(d)

(e)

(f)