大瑞铁路保山至瑞丽段及邻区地壳稳定性定量评价

大瑞铁路地处印度板块与欧亚板块碰撞带附近，地质构造条件复杂，活动断裂、高地应力、高地温、深埋隧道岩爆、软岩大变形等与地壳稳定性相关的地质问题严重制约着铁路工程规划建设。通过对大瑞铁路保山—瑞丽段及邻区地质背景、新构造活动、地壳隆升速率、潜在震源区、构造应力场、岩土体工程地质特征、地质灾害特征等因子分析，采用基于GIS的层次分析法，按照稳定、较稳定、较不稳定和不稳定4个等级，对大瑞铁路保山至瑞丽段及邻区的地壳稳定性进行了综合评价，将其划分为88个区；推荐线路C12K方案穿越19个地壳稳定性分区，其中不稳定分区占全线长度的9.79%，较不稳定分区占46.70%，较稳定分区占36.70%，稳定分区占6.81%。地壳稳定性评价结果对于指导铁路规划建设和线路优化具有重要的意义。 

QUANTITATIVE EVALUATION OF CRUSTAL STABILITY ALONG THE BAOSHAN-RUILI SECTION OF DALI-RUILI RAILWAY AND ITS ADJACENT REGION

The Dali-Ruili Railway is located near the India and Eurasian plate ＇s collision belt,where the geologic structure conditions are very complicated. The railway planning and constructionsare restricted by the complex engineering geological problems related to the crustal stability, such asactive fault, high geo-stress, rock burst of deep tunnel, large deformation of soft rock. This papermake the crustal stability zoning assessment on the basis of crustal stability influencing factorsanalysis, including the geological background, new tectonic movement, crust uplift rates, potentialseismic source area analysis, tectonic stress field, engineering geological characteristics of rock andsoil mass, as well as the geological hazards characteristics. The AHP method based on GIS was usedin the analyzing process. As a result, the crustal stability is divided into 4 grades： stable area,relatively-stable area, relatively unstable area and unstable area. 88 zoning sections are made alongthe Baoshan-Ruili section of Dali-Ruili Railway and its adjacent region. According to the zoningresult, there are 19 crustal stability zoning sections along the recommended C12K scheme, including9.79% of unstable area, 46.71% of relatively unstable area, 36.7% of relatively-stable area, and6. 18% of stable area. The regional crustal stability assessments have some important significance forthe railway construction and line optimization.