摘要
以上海地铁2号线盾构隧道上部局部基坑开挖(卸载)为实例,通过三维有限元法和局部均布荷载作用下弹性地基梁理论解析方法的竖向位移计算值与工程实测数据的对比分析,可知二者计算结果与实测值的规律一致,都可满足工程分析的要求精度,尤其局部均布荷载作用下弹性地基梁理论解析方法,不仅适宜于已建成隧道上部加载、卸载时隧道结构纵向沉降的估算,而且还可用于隧道结构的纵向设计,因此,其对地铁隧道结构的设计和保护都具有重要价值。
The excavation of a deep foundation pit above Shanghai metro line 2＇s shield tunnel built in soft earth is analyzed by theory and 3D-FEM ,the displacement of the shield tunnel obtained in process of excavation is compared with ones analyzed by theory and 3D- FEM, and there are similar characteristics between them, both ways of theory and 3D-FEM are useful in practice, especially the solution of the displacement of the shield tunnel constructed in soft soil under locally evenly distributed load,it not only can be used to estimate the displacement of shield tunnel, but also it is helpful to the longitudinal structure design of shield tunnel under any locally evenly distributed load.
出处
《四川建筑科学研究》
北大核心
2008年第5期103-107,共5页
Sichuan Building Science
基金
上海市教育委员会科学项目资助(04DC35)
上海师范大学横向科研项目资助(DL200810)
关键词
盾构隧道
弹性地基梁
解析解
纵向设计
三维有限元法
shield tunnel
winlder＇s elastic foundation
analytic solution
longitudinal structure design
3D-FEM
