Stability Analysis of Deep Foundation Pit with End-Suspended Pile Supporting Structure Based on Limit Equilibrium Finite Difference Method

Based on limit equilibrium finite difference method, the stability of deep foundation pit of the Guanlan storage pool was analyzed. Simulation analysis and research in the process of design and calculation are carried out and the safety factors are also calculated in different situations to anchor inclination, rock shoulder width and embedded depth. The results of numerical simulation show that the design of deep foundation pit with the end-suspended supporting system is reasonable. The increase in anchor inclination will lead to the first increase of safety factor then decrease, so the anchor inclination of about 20° is reasonable. The increase in rock shoulder width or embedded depth can control effectively stability and deformation of deep foundation pit. The safety factor of foundation pit would be increasing with the two factors increasing firstly. However, when the value exceeded a certain value, their influences on stability of foundation pit will tend to be insignificant.