高速公路改扩建工程中央分隔带排水设施优化设计

Optimal Design of Drainage Facilities in the Central Dividing Strip of Expressway Reconstruction and Expansion Project

在高速公路的改扩建中,中央分隔带的合理设计极为重要,根据现场调查,发现某高速公路多路段出现因下渗雨水掏蚀路基导致的路面脱空现象,为此,提出改扩建中央分隔带排水系统的优化措施。通过infoworks ICM软件模拟该路面雨水汇集过程,并复核了非超高段排水系统的水力过流能力,可有效改善现有布设方案。研究成果可为类似高速公路改扩建工程中央分隔带排水设计提供参考。

In the reconstruction and expansion of the expressway,the reasonable design of the central dividing strip is extremely important.According to the field survey,the pavement void phenomenon caused by the erosion of rainwater on the subgrade in many sections of the expressway is found,so the optimization measures for the reconstruction and expansion of the drainage system of the central dividing strip are put forward.The rainwater collection process of the pavement is simulated by infoworks ICM software,and the hydraulic overflow capacity of the drainage system in the non-superelevation section is reviewed,which can effectively improve the existing layout scheme.The research results can provide reference for the drainage design of the central dividing strip in the reconstruction and expansion projects of similar expressways.