Rock-socketed Piles with Steel Tube under Lateral ｌｏａｄ Analysis Based on Finite Element Method

Jun QIAO1, Ji ZHANG2, Tianhan LI1, Qiusheng HU1

1School of Civil Engineering & Architecture, Chongqing Jiaotong University, Chongqing 400074, CHINA

2Chongqing CITIC Yuqian Expressway Co., Ltd, Chongqing 400074, CHINA

Abstract: Lateral bearing behaviors of large-diameter rock-socketed pile with steel tube was studied by finite element method. According to the calculation results of ｌｏａｄ-displacement curve, the lateral displacement

curve and bending moment of pile, the influence of steel tube on lateral bearing behaviors of large-diameter rock-socketed pile was analyzed, and it was discussed that the influence of rock-socketed depth, pile diameter, steel tube rock-socketed depth, steel tube thickness and rock strength parameters on lateral bearing behaviors of large-diameter rock-socketed pile. The results show that the lateral bearing capacity of rock-socketed piles has been improved after considering steel tube; steel tube carries a part of lateral bearing capacity of rocksocketed pile, and it can effectively constrain the lateral displacement of the pile above the ground; rocksocketed depth and steel tube rock-socketed depth both have a critical rock-socketed depth, the influences of pile diameter, steel tube thickness and rock strength parameters on lateral bearing behaviors are different.

Keywords: Bridge engineering; Rock-socketed pile with steel tube; Lateral bearing capacity