| Firstly, the paper clearly revealed reason about three between the phenomenon of deformation which deformation of wall and pit bottom upheaval and surface settlement behind the wall by deep foundation pit mechanism.thus, the deformation between three are connected with each other: retaining wall earth pressure difference inside and outside direction to the pit deformation, soil after of wall vertical displacement; soil rebound bottom of pit caused by original stress state vertical unloading, produce a shift upward, result soil after wall vertical displacement retaining wall lateral displacement curve of get by using normal probability density function describes the surface through the maximum subsidence profile curves of settlement and lateral displacement of the retaining wall curve fitting by least square method in this paper, find out any point are derived the calculation formula of the maximum settlement by relationship between its. It plays an important role to prediction underground pipeline deformation and foundation pit around of soil what size of settlement. using ABAQUS to simulate the soil nailing-pile anchor support, more intuitive analysis of excavation of soil nailing and anchor force of different level in different pile body. results show that: the lateral displacement decreases and the downward trend, soil nailing-pile anchor support played an important role to control the foundation pit deformation.This paper also introduces the different supporting types. select the appropriate supporting structure according to the depth of excavation, the surrounding environment, geological, economic considerations in the practical engineering for provide security and stability of deep foundation pit engineering. combined with the Huaibei Eagle Building foundation pit engineering, details engineering soil nailing pile anchor bracing design and process, and monitoring the measuring point of settlement:the ground settlement observation points of deformation decrease rate, foundation pit is stable. |
