路面排水方式对路堤边坡防护的影响研究

道路工程师在选用路堤边坡防护型式时,考虑了路面排水方式的影响,但具体有什么样的影响,却缺乏理论依据和相关研究,为此本文在研究不同路面排水方式下边坡汇流流速的基础上,计算得到了不同情况下边坡水流的流速规律及有关数据,并通过分析这些数据与坡面允许流速的关系,得出如下结论:(1)路面排水方式对圬工防护影响较小,可以忽略;(2)路面排水方式对综合防护有一定的影响,建议路堤高7 0m以下(包括7 0m)路面采用漫流排水,路堤高7 0m以上路面采用集中排水;(3)路面排水方式对植草防护影响较大,路堤高3 0m以下(包括3 0m)路面采用漫流排水,路堤高3 0m以上路面采用集中排水。

Research Influence of Pavement Draining Manner on Embankment Slope Protection

When highway engineers selected the type of side slope protection, they have to consider the influence of pavement draining manner. But what these influence are is lack of theory gist and correlative research. Based on analysis of the velocity of slope run-off in different draining manner, the law of pavement and of slope current velocities,and some data are obtained from calculations.By analyzing the relationship between these data and critical velocity of the flow over the slope, some conclusions are gained as follows:(1)pavement draining manner have little influence on protection type of concrete and stone, which can be neglected;(2)pavement draining manner have certain influence on integrated protection. It is advised that adopting draining off water in overflow manner below 7.0m and adopting draining off water in concentrating manner upon 7.0m;(3) pavement draining manner have big influence on plant protection. It is advised that adopting draining run-off water in overflow manner for embankment below 3.0m and adopting draining run-off water in concentrating manner for embankment above 3.0m.