上海某黄浦江越江大桥桥墩基坑支护监测与数值模拟对比分析  

Monitoring and Numerical Simulation Analysis of Foundation Pit Support for a Huangpu River Crossing Bridge in Shanghai

作　　者：康迪 Kang Di

机构地区：[1]上海市交通建设工程安全质量监督站

出　　处：《交通与港航》2024年第S01期23-28,共6页Communication & Shipping

摘　　要：目前绝大部分基坑支护设计采用二维软件进行整体计算,同时采用三维有限元软件进行重点部位分析。基于上海某黄浦江越江大桥桥墩的基坑支护监测数据,通过大型三维有限元软件ADINA,对支护结构常见的基坑周围土体沉降、围护结构边界水平位移、钢支撑轴力数据进行对比分析,结果表明:基坑周边1/3D范围、角点处、斜撑、长边中心位置围护桩为安全风险点,应加强防控措施,软件模拟结果趋势与实际趋势基本一致,可作为基坑支护选型、施工管理等的参考。Most of the current foundation pit support designs are calculated using 2D software for overall analysis,while 3D finite element software is used for analyzing key areas.Based on the monitoring data of the foundation pit support for a certain Huangpu River crossing bridge in Shanghai,this article utilizes the large-scale 3D finite element software ADINA to compare and analyze common settlement of surrounding soil,lateral displacement of retaining structures,and axial force data of steel supports.The results show that areas within 1/3D range of the foundation pit perimeter,corners,diagonal braces,and the central positions of long sides of the support piles are safety risk points,requiring strengthened preventive measures.The simulation results of the software are generally consistent with the actual trends,providing references for foundation pit support selection and construction management.

关 键 词：深基坑 桩撑支护 有限元三维模拟 

分 类 号：TU7[建筑科学—建筑技术科学]