Research on Interaction of Pile - Anchor Retaining Structure and Proposed Pile-Raft Foundation

Abstract

During the excavation of the foundation pit, the interaction between the foundation pile anchor support structure and the proposed pile group raft foundation will affect the passive earth pressure of the support pile and the foundation pit uplift. In this paper, the finite element software ABAQUS was used to establish a foundation pit excavation model for two foundation pits with and without group piles. Through comparative analysis, the interaction between the pile-anchor support structure and the pile-slab foundation will affect the passive earth pressure of the supporting structure. As the depth of excavation increases, the earth pressure in the passive zone of the supporting structure gradually increases. Results have shown that the variation of the spacing between the pile foundation and the supporting structure will have a greater impact on the passive earth pressure. The research results in this paper summarize the experience of foundation pit construction and provide a numerical theoretical basis for the construction of similar deep foundation pits, which is of great significance for optimizing the design and construction of deep foundation pits.