Combined Application of Optical Fibers and CRLD Bolts to Monitor Deformation of a Pit-in-Pit Foundation

Figure 18

Internal force monitoring curves of CRLD bolts under different conditions: (a) internal force of bolts in side No. 1; (b) internal force of bolts in side No. 2; (c) internal force of bolts in side No. 3; (d) internal force of bolts in side No. 4.

(a)

(b)

(c)

(d)