复杂地质山区安顺至紫云高速公路定线研究

安顺至紫云高速公路所经区域地貌以岩溶及侵蚀中低山地貌为主,尤其杨武乡至终点段地形起伏较大,地貌类型复杂多变,断层破碎带、岩溶消水洞、出水口、溶腔、暗河等较为发育,顺层边坡较多,在复杂地质区域定线时应首先察明线路廊带内地形、地质条件,研究线路各段落工程地质主要特点,抓住控制线路布设的关键因素,提出合理可行的线路方案及比选意见。论述在项目定测期间,应用综合地质选线技术使推荐的线路方案良好绕避开断层破碎带,合理地绕避岩溶消水洞、出水口及暗河等,有效减少顺层边坡,推荐的线路方案安全、经济、合理。

Study of Alignment Plan of Anshun to Ziyun Expressway in Complex Geological Area

The regional landforms of Anshun to Ziyun Expressway are mainly in the karst and erosion low mountain landscape,especially Yangwu Town to the end section where heavier terrain fluctuation,complex and varied topography,large scope of fault fracture zone,karst cave,water outlet,karst warehouse,underground river,and consequent slope are dominated. Fixing road alignment in the complex geological areas requires first to investigate the route topography and geological conditions,then to study main engineering geology characteristics on each section and collect key factors related to route layout in order that the reasonable and feasible alignment plan and comparison suggestion can be finally proposed. This article addresses the application of comprehensive geological route selection technology during the project final survey period to allow the recommended alignment plan to appropriately pass fault fracture zone,karst cave,water outlet,underground river and the consequent slope. Therefore,the recommended alignment of this project is proved safe,economical and reasonable.