杭州某深大基坑工程变形监测与数值模拟研究  

Deep and Large Foundation Excavation Monitoring and Numerical Analysis in Hangzhou

作　　者：李慧慧[1] 赖小勇[1] LI Huihui;LAI Xiaoyong(Hangzhou Geotechnical Engineering&Surveying Research Institute Co.Ltd,Hangzhou 310012)

机构地区：[1]杭州市勘测设计研究院有限公司,杭州310012

出　　处：《土工基础》2023年第3期395-401,共7页Soil Engineering and Foundation

摘　　要：随着人类城市化进程不断发展,对于城市地下空间的开发规模也逐步增加,涉及到的基坑工程也逐步向着更深更大的方向发展,针对基坑支护设计提出了越来越高的要求。以杭州城北某深大基坑为例,详细介绍了其基坑特点及基坑支护设计方案,并采用了PLAXIS限元数值软件建立三维模型,模拟基坑施工全过程,最后结合监测数据分析了基坑变形特点。监测数据表明,项目设计方案选型合理,能较好的控制变形。对比基坑开挖引起的实测变形值与有限元模拟值,两者变形曲线形状基本吻合,变形趋势基本接近,验证了数值模拟的有效性。With the continuous urbanization,the development of the urban underground space has gradually increased,and the deep excavation projects involved have gradually increased in a deeper and larger direction.This trend requires higher and higher requirements for the excavation supporting system design.This paper presents a deep excavation project in the north of Hangzhou.The paper introduces in detail the characteristics of the foundation excavations and the design of the supporting structures.The PLAXIS finite element numerical software is used to establish a three-dimensional model to simulate the entire process of the excavation construction.The construction monitoring data are compared with the numerical analysis to evaluate the deformation characteristics of the supporting structure.The monitoring data show that the design parameters of this project were reasonably selected and can used for the better control the deformation.By comparing the measured values with the simulated values,the effectiveness of the numerical simulation is therefore verified.

关 键 词：深大基坑 变形监测 数值模拟 

分 类 号：TU473[建筑科学—结构工程]