复杂基坑不利点监测及墙体变形预测模型研究  

Study on unfavorable point monitoring and wall deformation predictionmodel of complex foundation pit

作　　者：刘凯 刘俊新[2] 李晓阁 朱春来 陈永强 LIU Kai;LIU Junxin;LI Xiaoge;ZHU Chunlai;CHEN Yongqiang(Dazhou Vocational and Technial College,Dazhou 635001,China;School of Civil Engineering and Architecture,Southwest University of Science and Technology,Mianyang 621010,China;China Railway Construction Croup Co.,Ltd.,Beijing 100040,China)

机构地区：[1]达州职业技术学院,四川达州635001 [2]西南科技大学土木工程与建筑学院,四川绵阳621010 [3]中铁建设集团有限公司,北京100040

出　　处：《水利水电快报》2024年第10期83-88,共6页Express Water Resources & Hydropower Information

摘　　要：为了探究基坑开挖施工对地下连续墙的作用机理,以杭州市富阳区一深基坑工程为研究背景,沿墙体周边开展了相关监测工作。系统地研究了土体测斜水平位移曲线、地下连续墙最大侧移分布、地下连续墙拐角中心侧移图、地下连续墙最大侧移与基坑开挖深度关系,并运用Gauss分布函数得到了围护结构变形发展的预测模型。结果表明:围护结构变形符合规律,TRD地连墙具有较好的变形协调能力;墙体变形与基坑空间变形规律一致;模型的拟合效果与实际监测数据较为接近。研究成果可为深基坑支护设计和施工提供参考。In order to explore the mechanism of foundation pit excavation on the underground diaphragm wall,a deep foundation pit project in Fuyang District of Hangzhou City was taken as an example,and related monitoring work was carried out around the wall.The horizontal displacement curve of soil slope measurement,the maximum lateral displacement distribution,the lateral displacement diagram of the corner center,the relationship between the maximum lateral displacement of underground diaphragm wall and the excavation depth of foundation pit were systematically studied.Moreover,a prediction model for the development of deformation of enclosure structures was obtained by using the Gauss distribution function.The results showed that the deformation of the envelope structure conformed to the law,and the TRD ground wall had a good deformation coordination ability.The deformation of wall was consistent with that of foundation pit space.The fitting effect of this model was close to the actual monitoring data.The research results can provide a reference for the design and construction of deep foundation pit support.

关 键 词：深基坑 地下连续墙 基坑监测 模型预测 

分 类 号：TU196[建筑科学—建筑理论] TU753