北京地区某深基坑支护设计与监测数据对比分析

Design and Monitoring Analysis of a Deep Foundation Pit in Beijing

基于积水潭医院深基坑支护项目勘察资料和支护设计方案,利用有限元软件MIDAS GTS建立三维基坑模型,对施工过程中深基坑开挖导致邻近建筑物产生的变形情况进行三维模拟计算。为验证MIDAS GTS软件在工程中应用的可靠性,对土压力、支护结构水平位移和周边建筑物沉降进行了监测。通过将三维模型模拟得到的数据与实际监测数据对比,验证了该数值模拟分析计算结果的可靠性。研究结果表明,数值模拟分析可作为基坑支护设计及方案比选的辅助手段,可为基坑监测点的布设提供参考。

Based on the geotechnical investigation and monitoring data of Jishuitan Hospital project of deep foundation pit supporting,a three-dimensional excavation model by MIDAS GTS was used to simulate the deformation of adjacent buildings caused by deep excavation during construction.To verify the reliability of MIDAS GTS software applied in engineering,earth pressure,horizontal displacement of support structures,and settlement of surrounding buildings were monitored.The reliability of the numerical simulation analysis and calculation results was verified by comparing the data obtained from the 3D model simulation with actual monitoring data.The research results indicate that numerical simulation analysis can serve as an auxiliary means for the design and scheme comparison of foundation pit support,and can provide reference for the layout of foundation pit monitoring points.