Numerical Analysis of Surcharge Effect on Stability and Interaction Mechanism of Slope-Pile-Footing System  

作　　者：Chao Xu Lei Xue Yuan Cui Mengyang Zhai 

机构地区：[1]Key Laboratory of Shale Gas and Geoengineering,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China [2]Innovation Academy for Earth Science,Chinese Academy of Sciences,Beijing 100029,China [3]College of Earth and Planetary Sciences,University of Chinese Academy of Sciences,Beijing 100049,China [4]Yellow River Laboratory,Zhengzhou University,Zhengzhou 450001,China

出　　处：《Journal of Earth Science》2024年第3期955-969,共15页地球科学学刊（英文版）

基　　金：funded by the National Key Research and Development Program of China(Nos.2018YFC1505302 and 2019YFC1509701);the National Natural Science Foundation of China(Nos.41977249 and 42090052)。

摘　　要：To investigate the stability and interaction mechanism of the slope-pile-footing system under surcharge effects,the finite difference method(FDM)was adopted to analyze the response laws of the stability of the reinforced slope,evolution of the critical slip surface,stress characteristic of retaining structures,deformation and failure modes of the slope foundation and building footing under surcharge parameters,including the surcharge intensity,the surcharge position,and the surcharge width.The results show that surcharge parameters significantly affect the stability and the deformation characteristics of the slope-pile-footing system.Specifically speaking,with the increasing surcharge intensity and the decreasing surcharge position and width,the deformation and failure mode of the system will gradually evolve in a direction that is harmful to its stability.The interaction mechanism of the slope-pile-footing system is further clarified as the load transfer of the building footing,the generation of the additional stress in the slope foundation,and the adjustment of pile bending moment due to the stress redistribution.Correspondingly,the safety of anti-slide piles will determine the stability of the slope foundation and building footing.These findings are expected to provide guidance for the comprehensive development and utilization of filled slopes after reinforcement.

关 键 词：slope-pile-footing system slope stability interaction mechanism finite difference method geotechnical engineering safety engineering. 

分 类 号：TG1[金属学及工艺—金属学]