淤泥质地层基坑土压力分布及变形特征数值分析  

Numerical Analysis of Soil Pressure Distribution and Deformation Characteristics of Foundation Pit in Muddy Stratum

作　　者：张立展 黎良杰[1] 王小波[1] 李姝[2] Zhang Lizhan;Li Liangjie;Wang Xiaobo;Li Shu(AVIC Institute of Geotechnical Engineering Co.Ltd.,Beijing 100098;BGI Engineering Consultants Co.Ltd.,Beijing 100038)

机构地区：[1]中航勘察设计研究院有限公司,北京100098 [2]北京市勘察设计研究院有限公司,北京100038

出　　处：《江西建材》2022年第10期196-198,共3页Jiangxi Building Materials

摘　　要：文中以江西省南昌市某淤泥质地层深基坑支护工程为例,采用midas GTS NX有限元分析软件建立了三维数值计算模型,分析了各工况下不同侧壁处土压力分布以及侧壁位移、周边建筑物位移等变形特征。数值模拟结果表明,各工况下基坑侧壁土压力在开挖面附近发生突变,其值明显减小;基坑侧壁土压力分布和位移均与周边建筑物荷载密切相关;基坑周边建筑物位移在第一步开挖时即已趋于稳定,后续开挖过程中变化不大。Taking a deep foundation pit support project in muddy stratum in Nanchang City of Jiangxi Province as an example, a threedimensional numerical calculation model is established by using midas GTS NX finite element analysis software, then the soil pressure distribution, side wall displacement and surrounding building displacement are analyzed in various working conditions. The numerical simulation results show that the soil pressure of the side wall of the foundation pit changes suddenly near the excavation surface and its value decreases obviously. The soil pressure distribution and displacement of the side wall of foundation pit are closely related to the load of surrounding buildings. The displacement of buildings around the foundation pit tends to be stable at the first step of excavation, but changes little in the subsequent excavation process.

关 键 词：淤泥质地层 土压力分布 变形特征 有限元分析 

分 类 号：TU753[建筑科学—建筑技术科学]