粉土地区框架桥设计要点

框架桥作为道路下穿铁路的立交形式具有比较明显的优点,但在粉土地区易受到地下水的影响而产生问题.通过分析粉土地区框架桥在施工期间及运营期间由于地下水问题导致的常见病害,结合新建和改建项目不同的工程实例,提出了工程设计中在基坑支护、地下水降排、结构接缝处理、既有框架病害整治等可采取的相关描施及设计要点.

Design Points of Frame Bridge in Silt Area

There are great advantages for frame bridge becoming the interchange form of rail road under wear, but silt area is easily affected by groundwater which causes problems. This paper analyzes some common problems led by groundwater during the construction and operation period of frame-bridge in silt area. Besides, this paper proposes some measures and related design elements in the design of the project excavation, groundwater drainage, structural joint processing and frame disease control combined with new construction and renovation Droiects of different engineering examples.