摘要
针对湿陷性黄土自身所特有的物理力学性质,采用一种新的接触器单元,模拟了地铁衬砌与土层之间的粘聚力与摩擦力,以及衬砌与土层之间的相互滑移、交叉变形等,分析了地下衬砌结构与土层之间的接触面特性。研究结果表明:衬砌拱顶、拱底节点垂直位移量以及摩擦力随着建筑物荷载减小而逐渐减小;滑移量最大的部位出现在高层建筑下衬砌的拱腰部分;在应力集中区域,交叉变形现象较明显。
According to physical and mechanical properties of collapsible loess, the simulation of cohesion, friction, mutual sliding and cross deformation between lining structure of subway tunnel and soil layer is done with a new contact element. The characteristics of interface between lining structure and soil layer is analyzed. The results show that the friction and the vertical nodes displacement of the lining vault and arch Bottom gradually reduced with the reducing of buildings load; the maximal slip part appears in the lining haunch of the high-rise Buildings; the crossdeformation phenomenon is more obvious in stress concentration region. 2 tabs, 13 figs, 11 refs.
出处
《长安大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2008年第5期91-94,98,共5页
Journal of Chang’an University(Natural Science Edition)
基金
陕西省自然科学基金项目(2003E228)
关键词
岩土工程
地铁
密集建筑物群
衬砌与土层
接触面特性
geotechnical engineering
subway
crowded building group
lining and soil
contact surface property
