明挖法下穿铁路大跨斜交箱涵稳定性分析  

Stability Analysis of Long-Span Skew Box Culvert Under Pass Railway with Open Cut Method

作　　者：杜朝伟[1] 倪鲁肃[1] 谭忠盛[1] 

机构地区：[1]北京交通大学土木建筑工程学院,北京100044

出　　处：《北京交通大学学报》2010年第4期41-44,共4页JOURNAL OF BEIJING JIAOTONG UNIVERSITY

基　　金：河南省交通运输厅科技项目资助(2006P33)

摘　　要：下穿既有铁路线箱涵施工可采用明挖法,采用临时架空结构来保证既有铁路线的运营.临时架空结构的稳定性和安全性是明挖法施工的关键.通过现场监测及对结构的位移、应力和应变等进行分析,建立有限元模型,模拟临时架空结构在列车荷载作用下的反应,评价结构的稳定性和安全性,为实际工程提供设计和施工依据.The construction of box culvert under pass railway makes use of temporary aerial structure to guarantee the normal operation of existing railway by open cut method. The stability and security of this temporary aerial structure are the crucial parts in the open cutting construction. Through actual field monitoring, the characteristics of the displacement, stress and strain of the structure are analysized. Combining with establishing finite element model and simulating the response of the temporary aerial structure under the load of the train at various speeds, the stability and security of the temporary structure are evaluated. The above studies provide basic supports for actual project design and construction.

关 键 词：明挖法 架空结构 现场监测 

分 类 号：U231.1[交通运输工程—道路与铁道工程] U449.82[建筑科学—桥梁与隧道工程]