超多车道高速公路超宽沥青路面水膜厚度分析

Analysis of water film thickness of super wide asphalt pavement on super multi-lane expressway

为解决道路通行能力的问题,改扩建工程通常采用扩宽通行段面的方法,超宽断面虽然提高了交通能力,但也增大了路面径流路径,增加了路面积水风险,而积水在路面形成水膜,降低路表与车胎的附着力,导致车辆发生水滑。高速公路,尤其是特殊路段,在不利天气条件等综合作用影响下的路面排水问题日益突出。依托南方某高速公路“六改十”改扩建工程项目,采用不同经验公式分别计算十车道及以上超多车道超宽断面路面水膜厚度,并分析不同因素对其的影响,为后续高速公路超宽断面的路面排水设计施工、研究提供参考。

In order to solve the problem of road capacity,the reconstruction and expansion project usually adopts the method of widening the passage section.Although the super wide section improves the traffic capacity,it also increases the road runoff path and increases the risk of water on the road.The water forms a water film on the road surface,reduces the adhesion between the road surface and the tire,and leads to the water slip of the vehicle.Highway,especially special section,pavement drainage problem is becoming more and more prominent under the influence of adverse weather conditions.Based on the “six to ten” reconstruction and expansion project of an expressway in southern China,different empirical formulas are used to calculate the water film thickness of ultra-wide section pavement with ten lanes or more and analyze the influence of different factors on it,providing reference for subsequent design and research of pavement drainage with ultra-wide section of expressway.