堤防道路改造技术研究及应用

堤防道路作为堤防和道路的结合体,一侧临江挡水、另一侧临布置有市政建筑物、防洪设施等构造物,以及农田、林地等自然资源土地,其地理位置特殊、环境因素多变,堤防道路改造技术研究具有一定的复杂性,对于解决防洪、交通等民生问题具有重要的实际意义。由于道路与堤防分属不同的学科领域,堤防道路属于交叉学科,目前关于堤防道路的改造技术要求研究较少。以严格执行堤防防洪标准、保障行洪安全、不影响堤防原有功能为原则,按道路位于堤顶和道路位于堤脚2种工况、向背江侧拓宽和向临江侧拓宽2种方向,提出了4种堤防道路改造技术方案,研究了路基高度、路基控制不均匀沉降的改造技术、与压浸台结合的路基结构,并提出了堤防道路改造全要素理念。研究成果成功应用于江北快速路、长江主轴右岸大道,可为类似堤防道路的改造设计提供借鉴。

Research and Application of Levee Road Reconstruction Technology

As a combination of levee and road, levee roads are featured with such special geographical location and changeable environmental factors as adjacent to the river on one side, and municipal buildings, flood control facilities, farmland, woodland and natural resource land on the other side. Research on levee road reconstruction technology, despite of its complexity, is of great practical significance for solving people’s livelihood issues such as flood protection and traffic. As road and levee belong to different disciplines, levee road are interdisciplinary, and there is currently little research on the technical requirements for levee road reconstruction. In line with the principle of strictly implementing flood protection standard, ensuring the safety of flooding, and exerting no effect on the original functions of levee, we designed four schemes of road reconstruction technology involving two working conditions (road at the top of the levee and at the foot), and two road-widening directions (toward the back of the river and toward the riverside). We examined the roadbed height, the reconstruction technology to control uneven settlement, and the structure combined with pressure immersion platform. We also proposed the concept of all-element design. Having been successfully applied to the Jiangbei expressway and the right bank avenue along the Yangtze River, the research achievements could be taken as reference for the design and reconstruction of similar levee roads.