城市道路拓展过程中常遇有下穿既有铁路线立交桥工程，雨水泵站的合理设计是下穿工程安全运行的关键要素之一。
In case of urban road development process often beneath existing railway overpass project, the rational design of rainwater pump station is the key element of safe operation in crossing engineering.
纵断面设计是道路线形设计中的重要组成部分，纵断面线形的设计质量在很大程度上决定着道路的安全性与使用功能的好坏。
Vertical section design is a important part in road line design, the quality of vertical section line determine the security and function of the road.
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