过量的水是使路基产生病害的主要原因之一。一方面,土中含水量的增加将降低路基土的强度和稳定性;另一方面,水对路基的浸泡、冲刷等作用将直接影响路基的正常使用,高速公路和一级公路路面积水会影响行车安全。因此应修筑必要的排水设施拦截或排除危害路基的地表水和地下水,路面积水应及时排除,确保公路安全使用。1.地表排水设施施工质量控制路基地表排水设施包括边沟、截水沟、排水沟、急水槽、拦水带、蒸发池等。施工排水设施应做到位置、断面尺寸、坡度准确,所用材料符 Excess water is one of the main causes of roadbed disease. On the one hand, the increase of water content in soil will reduce the strength and stability of subgrade soil. On the other hand, the effect of water immersion and scouring on subgrade will directly affect the normal use of subgrade. Affect traffic safety. Therefore, the necessary drainage facilities should be built to intercept or eliminate the surface water and groundwater that endanger the roadbed. The water in the road surface should be promptly removed to ensure the safe use of the road. 1. Construction quality control of surface drainage facilities Subgrade surface drainage facilities include side ditches, intercepting ditches, drainage ditches, emergency tanks, water blocking belts, evaporation ponds and the like. Construction drainage facilities should be the location, section size, accurate slope, the material used character