基于反演分析的地面超载对深基坑变形影响研究  

Study on the Influence of Ground Overloading on Deep Foundation Pit Deformation Based on Inversion Analysis

作　　者：计鹏 李栋梁 左战旗 陈素敏 JI Peng;LI Dongliang;ZUO Zhanqi;CHEN Sumin(China Railway Liuyuan Group Co.Ltd.,Tianjin 300000,China;Xuzhou Wzater Conservancy Construction Design and Research Institute,Xuzhou Jiangsu 221000,China)

机构地区：[1]中铁第六勘察设计院集团有限公司,天津300000 [2]徐州市水利建筑设计研究院,江苏徐州221000

出　　处：《铁道建筑技术》2021年第9期24-28,52,共6页Railway Construction Technology

基　　金：国家自然科学基金资助项目(51608351)。

摘　　要：随着越来越多的地铁投入建设,地面超载直接影响基坑的安全性。为分析某地铁基坑在地面超载条件下支护结构的受力和变形,首先通过现场观测手段和利用plaxis有限元软件数值计算获取基坑支护结构的变形和位移数据;然后利用反演分析方法,确定合理的土体计算参数;最后数值模拟计算不同地面超载条件下的支护结构的受力和位移情况。研究思路、方法合理,研究结果可信。在施工过程中尽量避免基坑临近路面出现超载,研究结果可供类似工程借鉴。With more and more subways are put into construction,the ground overloading directly affects the safety of foundation pit.To analyze the stress and deformation of the retaining structure of a subway foundation pit under ground overloading,the deformation and displacement data of the foundation pit support structure are obtained by means of field observation and numerical calculation with plaxis finite element software,then the method of inversion analysis is used to determine the reasonable soil calculation parameters,and finally the numerical simulation is performed to calculate the stress and displacement of retaining structure under different ground overload conditions.The research approach and methods are reasonable,and the research results are credible.In the construction process,the overloading near the pavement of the foundation pit should be avoided as far as possible,the research results can be served as a reference for similar projects.

关 键 词：基坑 反演分析 超载 现场监测 有限元 

分 类 号：TU433[建筑科学—岩土工程] U231.3[建筑科学—土工工程]