基于GIS的滇藏铁路丽江—香格里拉段工程地质条件分区研究

结合滇藏铁路丽江—香格里拉段的线路比选问题,在综合分析区域地质背景、地形地貌、工程地质岩组、斜坡结构、地质灾害发育现状、地壳稳定性、人类工程活动、降水量、距沟谷的距离等指标因素的基础上,通过专家打分建立了层次分析结构模型和数学模型以及计算工程地质条件指数的公式,并计算了各影响因子的权值,同时基于Arc-GIS 9.2平台进行了工程地质条件分区。计算结果显示研究区工程地质条件以中等和较差为主,基于工程地质分区结果和实际资料分析,对丽江至香格里拉段线路的丽江南部段进行了优化。研究结果对指导研究区进行重大工程建设和规划具有指导意义。

Research on Geo-engineering Conditions of the Lijiang-Shangri-La Railway Section of the Yunnan-Tibet Railway Based on the GIS MethodGUO Chang-bao1, ZHANG Yong-shuang1,

According to the geo-engineering problems in the alternative lines of the Lijiang-Shangri-La railway section of the Yunnan-Tibet railway,the paper comprehensively analyzed the factors of the regional geological setting and topography,the rock group of engineering geology,the slope structure,geo-hazards developing status,the earth's crust stability,the human engineering activities,the precipitation and the distance to the valley,and established the analytic hierarchy process(AHP) and mathematical models according to the expert scoring.The paper established the computational formula of engineering geological condition index and calculated the impact factor weights,and made the engineering geological condition zoning based on the ArcGIS 9.2 platform.The calculation results show that the engineering geological conditions are mainly poor and medium in the study area.Based on the results of the engineering geological zoning and real data analysis,the paper made optimization of the southern segment of Lijiang-Shangri-La railway line.The research methods and conclusions in the paper are of good guiding and reference to the construction and planning of the project in the study area.