安康至重庆高速铁路大巴山区工程地质条件及选线研究

研究拟建安康至重庆高速铁路沿线的工程地质条件,分析主要的工程地质问题。针对经达州(四川)、万州(重庆)两个主要线路方案,提出工程地质比选意见。收集方案研究范围内的区域地质资料,既有公路、铁路的科研报告,相关政府部门的地质灾害报告,大巴山区岩溶特征相关资料。在大巴山区的城口、岚皋等地区,开展地质调绘工作。掌握了沿线的地形地貌、气象、地震等自然地理概况,以及地层岩性、地质构造、不良地质、特殊岩土等工程地质概况,尤其是大巴山区的岩溶发育特征。根据沿线的工程地质条件,分析修建该铁路可能遇到的工程问题。对两个主要比选方案,进行了工程地质条件评价。线路通过大巴山区时,经万州方案的工程地质条件更复杂,施工风险更大。推荐经达州方案。

Research on Engineering Geological Conditions and Route Selection of Ankang-Chongqing High Speed Railway in the Daba Mountain Area

In order to study the engineering geological conditions, along Ankang-Chongqing high-speed railway which is proposed and analyze the main engineering geological problems. In view of the two main route schemes of Dazhou(Sichuan) and Wanzhou(Chongqing), suggestions on engineering geology comparison and selection are given. The regional geological data in the study area were collected, including the research reports of highways and railways, the geological hazards reports of relevant government departments, and the Karst Characteristics of Daba Mountains. In the area of Daba Mountain, such as Chengkou and Langao, geological mapping work is carried out. The general situation of physical geography, such as topography, meteorology and earthquake, as well as engineering geology, such as stratum lithology, geological structure, bad geology, special rock and soil, especially karst development characteristics in Daba Mountains, were mastered. According to the engineering geological conditions along the line, the engineering problems that may be encountered in the construction of the railway are analyzed. The engineering geological conditions are evaluated for two main comparison schemes. Through the Daba mountain area, the engineering geological condition of the Wanzhou scheme is more complex and the construction risk is greater. The Dazhou Route Scheme is recommended.