山区高速公路路面病害分析及治理对策

Analysis and Harnessing Methods for Pavement Disease of Expressways in Mountain Area

通过分析山区高速公路的线形特点、结构形式、地理环境和区域经济状况,指出了粤赣高速公路在常规设计标准下可能出现的病害及诱因,在借鉴邻近线路的成功施工经验的基础上,结合粤赣公路的特点提出了针对性的治理对策,即通过设计土工格栅、注浆手段加固典型路段路基强度;通过完善排水系统和设计排水路面解决积水问题;通过设计水泥混凝土路面解决车辙和开裂问题;通过改善路面基层的结构设计解决不均匀沉降问题;通过改变桥梁伸缩缝的位置和伸缩缝填料材质,填挖交界位置、加宽平台及采用兰派压路机击实,达到解决路面特殊位置早期破坏的目的。

On the basis of the alignment characteristics of expressways, structural styles, geological environment and regional economy conditions in mountain areas, the engineering disease problems and induced reasons are analyzed which may appear in the conventional design standard situations. According to the successful experiments of nearby highways and traits of Yue-Gan Expressway, the harnessing methods are put forward,including designing geomat and grouting to raise the roadbed strength,perfecting drainage system to solve waterlogging,designing cement concrete pavement to solve ruts and cracks,optimizing the design of roadbase structure to solve non-uniform settlement,changing the positions of bridge expansion joints and joint fillers ,and compacting and widening the benches at the demarcation plane of cut and fill to solve early failure at particular situations of pavemnets.