兰溪市李渔路下穿铁路涵洞排水设计与思考

Drainage Design and Thinking of Liyu Road Underpassing Railway Culvert in Lanxi City

下穿涵洞相对市政道路形成低洼区,暴雨时低洼涵洞积水将阻隔交通乃至发生人员伤亡,故涵洞排水设计及安全运营策略尤显重要。为此,文章针对兰溪市李渔路下穿铁路立交涵洞排水,在分析设计重现期选取、雨水集流时间计算、设计暴雨强度计算、雨水管及雨水口选用、排水泵选择、排水泵房设置的基础上,从源头减排、排水通畅、监测预警三个方面提出设计建议,供设计人员参考。

Low-lying areas are formed by underpassing culverts relative to municipal roads. Water accumulation in low-lying culverts will block traffic and even cause casualties during rainstorm. Therefore, culvert drainage design and safe operation strategy are particularly important. To this end, this paper aims at the drainage of Liyu Road underpassing railway interchange culvert in Lanxi City. Based on the analysis of the selection of design recurrence period, the calculation of rainwater catchment time, the calculation of design storm intensity, the selection of rainwater pipe and rainwater outlet, the selection of drainage pump, and the setting of drainage pump room, it puts forward design suggestions from three aspects of source emission reduction, smooth drainage, and monitoring and early warning for the reference of designers.