Analysis of soil movement around a loaded pile induced by deep excavation

2018 International Conference on Civil and Hydraulic Engineering

土木建筑工程;水利工程

Liu, Nianwu^1 ; Yu, Jitao^1 ; Gong, Xiaonan^2 ; Chen, Yitian^3

China Railway Eryuan Engineering Group CO. LTD, Chengdu, Sichuan

610031, China^1

Country Research Center of Coastal and Urban Geotechnical Engineering, Zhejiang University, Hangzhou, Zhejiang

310058, China^2

School of Civil Engineering and Architecture, Zhejiang Sci-Tech University, Hangzhou, Zhejiang

310018, China^3

关键词: Analysis of soils;    Displacement field;    Empirical formulas;    Influence coefficient;    Reduction coefficient;    Retaining structure;    Soil settlements;    Three dimensional finite element model;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/189/3/032053/pdf
DOI  :  10.1088/1755-1315/189/3/032053

学科分类：土木及结构工程学

来源: IOP

【 摘 要 】

The change of the bearing capacity of an adjacent pile induced by the excavation of a foundation pit involves the complex interaction between the retaining structure, soil, and loaded pile. Thus, the study of the displacement field of the soil around the pile is very important. A three-dimensional finite element model was established and the influence of pile spacing and pile-cap spacing on the displacement of soil around the pile was analyzed. The pile foundation could restrain the settlement of the soil around the pile. In addition, the soil within 20 m below surface was obviously affected with an influence coefficient of 0.7. The results show that when the pile-cap spacing is less than 50 m, the soil settlement coefficient changes approximately linearly. Moreover, an empirical formula is obtained for the reduction coefficient.