结合连霍高速公路郑洛段单侧加宽改扩建实践,根据项目区地形、地貌、老路排水现状、超高情况及施工中存在的问题,依据排水设计原则,系统地介绍了单侧加宽改扩建方式下路基排水设计、新老路之间排水设计、半路半桥排水设计,为今后该类型扩建方式下的路基路面排水设计提供经验和参考。 According to the practice of unilateral widening and extension of Zhengluo Section of Lian-Huo Expressway, based on the topography, topography, the drainage status and the superhighway conditions in the project area and the problems in the construction, based on the drainage design principles, The design of subgrade drainage, the design of drainage between old and new roads and the drainage design of half-bridge and half-bridge under the mode of expansion and expansion provide experience and references for the design of subgrade drainage in this type of expansion.