天津某封闭式路堑U型槽结构的设计与计算

The Design and Calculation for One of the Closed Type U Shape through Cutting in Tianjin

研究目的:根据本公铁立交工程中道路以下钻方式通过地下水路堑的特点,对封闭式路堑U型槽结构的设计与计算进行研究,以解决地下水渗流和渗透问题。研究方法:针对本工程的地质、水文条件,结合国内研究成果及多项成功的工程实例,对封闭式路堑U型槽结构形式的选型、边墙及底板的受力进行了分析和计算。研究结果:通过对封闭式路堑U型槽结构的有关理论、工艺问题的探讨,探索出一套成功的设计计算方法,为进一步推广这一结构提供了设计实例参考和实践经验。研究结论:封闭式路堑U型槽结构是一种较新的结构形式,一般适用于地下水位较高或地下水渗透系数较大的含水地层及某些特殊原因不允许降低地下水的路堑。

Research purposes： On the basis of the fact that the road for one of the crossing of highway and railway in Tianjin drilled through the ground water cutting, the problems in seepage and permeability of the ground water were solved through making researches on the design and calculation for the closed type U shape through cutting. Research methods：According to the geological and hydrological conditions for this project and in combination with the research achievements at home and several successful practical examples, the analysis and calculation have been made on the design type selection, the stress of side wall and bottom board for the closed type U shape through cutting. Research results：A set of successful design and calculation method was explored through the discussion for the related theory and technics problems of the closed type U shape through cutting. And a design example and experience to further extend the use of this structure type was provided. Research conclusions：The closed type U shape through cutting is a new structure type, which is suitable to be used in the through cutting where soil is highly penetrable with water or ground water.