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,针对基坑支护设计的要求也越来越高。本文以杭州市余杭区某地铁上盖项目为例,详细介绍了其基坑特点及基坑支护设计方案,并采用了Plaxis有限元数值模拟软件建立三维模型,模拟基坑施工全过程,最后结合监测数据分析了基坑开挖过程中对邻近地铁隧道的影响,并总结归纳了施工过程中造成地铁隧道变形报警的原因。本项目基坑面积较大,深度较深,且涉及保护对象较多,本工程的变形报警原因可以为后续邻近区域或类似工程提供参考。
With the continuous development of human urbanization process,the development scale of urban underground space has gradually increased,and the foundation pit engineering involved has gradually developed in a deeper and larger direction.Meanwhile,the requirements for foundation pit support design are getting higher and higher.Taking a subway upper cover project in Yuhang District of Hangzhou City as an example,this paper introduced the characteristics of foundation pit and its support design scheme in detail.The finite element numerical software Plaxis was used to establish a three-dimensional model to simulate the whole construction process of the foundation pit.Finally,combined with monitoring data,the influence of foundation pit excavation on adjacent subway tunnels was analyzed.The causes of subway tunnel deformation alarm during construction are summarized.The excavation area of this project is large,the depth is deep,and there are many protected objects involved.The deformation alarm causes of this project can provide a reference for subsequent neighboring areas or similar projects.
作者
徐银锋
张宏建
赵华
岑维杰
XU Yin-feng;ZHANG Hong-jian;ZHAO Hua;CEN Wei-jie(Hangzhou Geotechnical Engineering and Surveying Research Institute with Limited Liability,Hangzhou 310012,Zhejiang,China)
出处
《地基处理》
2023年第S01期97-104,111,共9页
Journal of Ground Improvement
关键词
深大基坑
变形监测
数值模拟
有限元
三维模型
数据分析
deep and large foundation pits
deformation monitoring
numerical simulation
finite element
3D model
data analysis
