城市道路水泥混凝土路面锯齿形偏沟设计方案

Design Scheme of Saw-tooth Gutter for Urban Road Cement Concrete Pavement

水泥混凝土路设计时,遇到设计纵坡小于0.3%,按规范要求设置锯齿形偏沟或采取其他排水措施,过去常采用缩短雨水口的间距办法,来解决排水问题,实际上此措施是不能很好地解决排水问题的。提出:仅在道路边缘50cm范围内设置偏沟的办法(水泥混凝土路面一般不设置平石),雨水口距离可保持40m,不再要加密雨水口,缩短雨水口的间距,同时又能满足路面排水的要求,供大家讨论及参考使用。同时介绍了小区水泥混凝土道路设计时,由于雨水口距离远小于40m,可根据实际确定减小的雨水口最大距离,而减小雨水口处偏沟的横坡。

During the design of cement concrete road and the design longitudinal slope <0.3%,the saw-tooth gutter is constructed according to the standards or the other drainage measures are taken.In the past,the method to shorten the space of rainwater inlet was used to solve the drainage problem.This measure can not better solve the drainage problem in fact.The article puts forward the method only to construct the gutter within the range of road edge 50 cm(the cement concrete pavement is generally not constructed with XXX),to keep 40-m distance between rainwater inlets,not to dense rainwater inlets and to shorten the space of rainwater inlet,which can satisfy the requirement of pavement drainage,and be referred for the discussion and projects.The article also introduces that the maximum distance of rainwater inlet can be decreased according to the status if the distance of rainwater inlet is smaller than 40 m during the design of cement concrete roads of the residential areas,and the cross slope of gutter at rainwater inlet can be decreased.