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文章选择地形地貌、易滑岩组、地质构造复杂程度、河流切割密度及地质灾害分布密度作为基本评价因子,降雨作为诱发因素,每个因子分成4级,其权值由黄金分割法确定,采用模糊综合评价的方法,分两层次进行。首先计算基本因素对贵州省地质灾害危险性的影响;再将降雨诱发因素与基本因素叠加计算两类因素对贵州省地质灾害危险性的综合影响,得出不同因素下的贵州省区域地质灾害危险度为:灾害密集发育区、灾害中等密集发育区、灾害偶发区、灾害基本不发育区。分区结果表明:灾害密集发育区和灾害中等密集发育区主要分布在贵州省西南部及北东部的部分地区;在雨季地质灾害危险性明显增加,黔东南地区值得尤为关注,这一结论对指导高速公路选线和深挖高填边坡的勘察、设计和施工安全管理具有重要意义。
In this paper, topography, slippery rock group, complexity of geological structure, density of river cutting and distribution density of geological disasters were selected as the basic evaluation factors. Rainfall was taken as inducing factor and each factor was divided into four levels. The weight was determined by golden section method. Fuzzy comprehensive evaluation method, divided into two levels. Firstly, the influence of basic factors on the risk of geological disasters in Guizhou Province is calculated. Then, the comprehensive influence of two kinds of factors on the risk of geological disasters in Guizhou Province is calculated by superposing rainfall-induced factors and basic factors, and the risk of regional geological disasters under different factors is obtained Degrees: densely populated disaster areas, dense medium-intensive disaster areas, disaster sporadic areas, basic disaster areas. The results of zoning showed that the densely-populated developing areas and the moderately densely populated areas were mainly distributed in the southwestern part of Guizhou Province and parts of the northern part of the country. In the rainy season, the danger of geological disasters was obviously increased, and the southeastern Qiandongnan area deserved special attention. Highway alignment and deep excavation of high slope slope survey, design and construction safety management is of great significance.