公路的最大病因之一是水害,例如,水分的积聚使得沥青与集料之间的粘接力下降,造成路面基层承载能力下降,降低了路面材料的强度;受土质、气温的影响又容易引起土质松软、边坡坍塌、基身沉陷或产生滑动,既而导致道路的冻胀与翻浆的产生。因此为保证公路的实用性和畅通性,必须格外重视高等级公路的排水系统设计。 One of the major causes of the road is water damage. For example, the accumulation of water causes the adhesive force between the asphalt and the aggregate to drop, causing the carrying capacity of the road base to drop, which reduces the strength of pavement materials. Soft soil, slope collapse, the body sinking or slippage, which led to the road frost heave and the emergence of the production. Therefore, in order to ensure the practicality and smoothness of the highway, we must pay special attention to the drainage system design of high-grade highways.