长沙理工大学学报（自然科学版）2025，Vol.22Issue(1)：101-110,10.DOI:10.19951/j.cnki.1672-9331.20230105001
基底土体加固对超长深基坑变形的影响及优化分析
Influence of basement soil reinforcement on deformation of ultra-long deep foundation pit and optimization analysis
摘要
Abstract
[Purposes]The influence of various influencing factors of basement soil reinforcement on the deformation of ultra-long deep foundation pit was comprehensively considered,and the design of the reinforcement scheme was optimized.[Methods]Based on the foundation pit project of a subway station,FLAC3D finite element software was used to numerically simulate the excavation of the foundation pit,and the orthogonal test method was used to comprehensively analyze the influence of the planar design shape and reinforcement parameters of the basement soil reinforcement on the lateral displacement of the underground continuous wall and the vertical displacement of the foundation pit.In addition,the influence of various factors on the above displacement indexes was analyzed and determined.[Findings]The different plane design shapes of the basement soil reinforcement have different effects on the deformation of the ultra-long deep foundation pit,and the reinforcement method of the entire basement soil has a significant control effect on the deformation of the foundation pit.The reinforcement method along the diaphragm wall can also play a good role in controlling the deformation of the diaphragm wall.Different reinforcement parameters have different effects on foundation pit deformation,and the deformation control effect gets better with the increase in cement content and reinforcement thickness.The plane design shape of the basement soil reinforcement has a great influence on the deformation control of the ultra-long deep foundation pit,and the reinforcement thickness and cement content have relatively little influence on the deformation control of the ultra-long deep foundation pit.The control effect on the deformation of the foundation pit is the most ideal when the reinforcement method of the entire basement soil is used with a cement content of 14%-16%and reinforcement thickness of 10-12 m.[Conclusions]In the design of an ultra-long deep foundation pit,the plane design shape of the basement soil reinforcement should be considered,and the influence of the reinforcement parameters on the foundation pit under the plane design shape should also be comprehensively considered.In the design of the same type of foundation pits,priority should be given to the plane design shape of the reinforcement method of the entire basement soil,and the cement content and reinforcement thickness can be appropriately reduced if necessary,so as to improve the economic rationality of foundation pit engineering design.关键词
基坑开挖/基底土体加固/数值模拟/基坑变形/优化分析Key words
excavation of foundation pit/basement soil reinforcement/numerical simulation/deformation of foundation pit/optimization analysis分类
建筑与水利引用本文复制引用
刘洋,何忠明,王利军,王盘盘..基底土体加固对超长深基坑变形的影响及优化分析[J].长沙理工大学学报（自然科学版）,2025,22(1):101-110,10.基金项目
国家自然科学基金(51978084) （51978084）
广州地铁集团有限公司科研项目(HT200856) （HT200856）
长沙理工大学研究生"实践创新与创业能力提升计划"(SJCX2021111) Project(51978084)supported by the National Natural Science Foundation of China （SJCX2021111）
Project(HT200856)supported by Scientific Research Project of Guangzhou Metro Group Co.,Ltd. （HT200856）
Project(SJCX2021111)supported by"Practical Innovation and Entrepreneurship Ability Enhancement Program"for Graduate Students of Changsha University of Science&Technology （SJCX2021111）
