深基坑地下连续墙支护结构数值模拟分析  

Numerical simulation analysis of diaphragm wall support structure in deep foundation pit

作　　者：方超 FANG Chao(China Railway Construction Group Co.,Ltd.,Beijing 100000,China)

机构地区：[1]中铁建设集团有限公司,北京100000

出　　处：《四川建材》2025年第3期155-158,共4页Sichuan Building Materials

摘　　要：随着城市化步伐的加速,深基坑工程的重要性日益显著,同时也伴随着诸多挑战。以江苏省南京市某工程为例,运用ABAQUS软件进行数值模拟分析,研究地下连续墙支护结构参数对基坑安全性能的影响。通过模拟可得,保持其他参数不变时,墙厚减小会使地下连续墙侧向位移增大,墙厚超一定范围后影响变小;当内支撑截面增大,地下连续墙侧向位移与墙顶位移减小,幅度渐小且对坑底以下位移影响小;当嵌固深度增大,最大侧向位移减小,随超过一定范围后再增加则位移基本保持不变。研究结果表明,墙厚、内支撑刚度、嵌固深度变化对地下连续墙侧向位移影响较大、敏感性较高。通过本研究可对优化地下连续墙支护结构等类似工程提供参考,确保基坑安全稳定,提高工程经济性与合理性,推动深基坑技术发展。With the acceleration of the pace of urbanization,the importance of deep foundation pit engineering is becoming more and more prominent,accompanied by many challenges.This paper takes a project in Nanjing as an example,and uses ABAQUS software to carry out numerical simulation analysis to study the influence of structural parameters of diaphragm wall support on the safety performance of foundation pit.Through simulation,it can be obtained that when other parameters remain unchanged,the decrease of wall thickness will make the lateral displacement of diaphragm wall increase,and the influence becomes smaller after the wall thickness exceeds a certain range;when the internal support cross-section increases,the lateral displacement of the diaphragm wall and the displacement of the top of the wall decrease,the amplitude is gradually smaller and the influence on the displacement of the pit below the bottom is small;when the embedment depth increases,the maximum lateral displacement decreases,and then increases with the increase of more than a certain range,then the displacement is basically kept unchanged.The study shows that changes in wall thickness,internal support stiffness,and embedment depth have a greater impact on lateral displacement of diaphragm walls and have higher sensitivity.This study can provide reference for optimizing the support structure of diaphragm wall and other similar projects to ensure the safety and stability of the foundation pit,improve the economy and rationality of the project,and promote the development of deep foundation pit technology.

关 键 词：深基坑 地下连续墙 ABAQUS 敏感性 

分 类 号：TU753[建筑科学—建筑技术科学]