公路边沟设在路基的两侧,是公路的主要排水设施之一。它的作用是把雨水从路面、路肩上排出去;并能降低地下水位,使路基不致过分潮湿而软化。边沟养护不善,会影响路基和路面的技术状况,因此切不可等闲视之。公路边沟如果疏于养护,便容易造成淤塞,会使洪期路面上的雨水不能顺畅地排出去,易造成水毁病害。因积水长时间的浸泡,土路面会逐渐软化,在过往车辆轮胎的反复推压力的作用下,会产生露骨、坑槽、翻浆等病害;油路面上的积水则会使车轮打滑,造成交通安全事故隐患;油路面基层因过分 Roadside ditch located on both sides of the roadbed, is one of the major drainage facilities on the road. Its function is to discharge rainwater from the road surface and shoulders. It can also reduce the water table and make the roadbed not be excessively moist and softened. Poor maintenance of ditches will affect the technical conditions of roadbed and pavement, so must not be ignored. If the roadside ditch pays more attention to conservation, it will easily cause siltation, which will make it impossible for the rainwater on the road surface to be drained smoothly and easily cause water damage. Due to prolonged immersion in water, the soil pavement will soften gradually. Under the action of repeated pushing force of past vehicle tires, there will be exposed diseases such as denting, pit and spatter. The water on the oil surface will cause the wheel to slip and cause Traffic safety accidents; oil road surface grassroots due to excessive