软土基坑开挖变形影响的有限元分析  

Finiteelement Analysis on the Deformation of Excavation in Soft Soil

作　　者：丁向东[1] DING Xiang-dong(Jiangsu Jianyuan Geotechnical Engineering Survey Co.,Ltd,Nanjing Jiangsu 210009 China)

机构地区：[1]江苏省建苑岩土工程勘测有限公司,江苏南京210009

出　　处：《江苏建筑》2020年第S01期59-62,共4页Jiangsu Construction

摘　　要：基于GTS-NX软件,采用土体硬化本构模型,以南京中保街某基坑工程为研究对象,进行了深基坑开挖过程中围护结构变形的三维有限元模拟分析,并将计算值与工程实测值对比分析。结果表明:基坑变形实测值满足规范要求,表明了预应力组合型钢支撑方式和分区段开挖方式运用于软土基坑的有效性,为以后相关工程的设计与开挖方式提供依据;围护结构计算值与实测值变化趋势大致相同,说明了模型较好地预测了围护结构的侧向变形,验证了模型的合理性。Based on the software GTS-NX,using the soil hardening constitutive model,taking an excavation project in Nanjing Zhongbao Street as the research object,the three-dimensional finite element simulation analysis of the retaining structure deformation during the excavation of deep excavation is carried out,and the calculated value is compared with the measured value of the project.The results show that:the measured values of excavation deformation meet the requirement of the code,which shows the effectiveness of pre-stressed composite steel support and block excavation method applied to soft soil excavation,and provides the basis for the design and excavation method of related projects in the future;the variation trend of the calculation value of the retaining structure and the measured value is roughly the same,which indicates that the model can predict the lateral deformation of the retaining structure well and the rationality of model is verified.

关 键 词：基坑开挖 有限元分析 预应力组合型钢支撑 分区开挖 

分 类 号：TU471.8[建筑科学—结构工程]