交叉公路下穿式U型船槽结构受力分析

Mechanical analysis on U-type through structure of underpass intersection

U型船槽结构是一种新型结构,具有防止受地下水的影响产生路基病害、保证引道周围的工程地质环境不被破坏等优点,逐渐被更多的工程采用。目前U型船槽的底板计算尚无公认较优的计算方法和设计规范规定。结合工程实例,对U型船槽结构边墙及底板建立有限元模型,分析该结构的受力情况,得到结构在相应荷载条件下的应力与变形规律,为此类结构的设计提供参考和借鉴。

As a new structure style,U-type through structure due to prevent the roadbed disasters caused by the influences of groundwater,it could save engineering geological environments surrounded the approach roads from damage.This structure is chosen by more and more projects currently.So far,no admitted optimal calculation method and design specification compute the bottom plate of U-type through structure.According to a practical engineering example,paper establishes side walls and floor plates of U-type through structure finite element models,analyze the force condition integrally.Comparing stress,deformation and shearing force of floor plates with specification requirements,which met the requirements well made a number of technology references on the design measures.