摘要
介绍了可拓方法基本理论,并应用于地质灾害危险性分区,确定了影响地质灾害危险性分区的8个评价指标:评价区内已有灾害点数量、灾害危害对象、岩性及风化程度、岩层的倾向与坡向的组合关系、节理裂隙发育情况、人类活动影响强度、水文地质条件、地形坡度。建立了危险性分级标准,并进行了相应的量化赋值。在评价过程中,以地形图100 m×100 m网格为基本评价单元,通过计算机程序将所有网格数据进行处理,得出了相应的分区等级,并且通过级别特征值的计算,更加准确地反映出所评价区域的实际情况。通过三峡库区向家河大桥库岸地质灾害危险性分区的实践应用,证明这一方法是切实可行的。
The basic theory of extension method is introduced and the method is applied into risk zoning of geological disaster. Eight evaluation indexes were selected to be synthesis appraising system; they are the number of the existed geological diseases, the objects involved by the diseases, the lithology and the weathering degree of the rock mass, the relation between the dip of the discontinuities and the strike of the slopes, the features of the fractures, the influence intensity of human activities, the hydrogeolgy conditions and the dip angle of the slope surface. The risk grading standard is established; and corresponding value assignment is done. During the process of evaluation, the square of 100×100 m^2 grid on geographical map is designed as the basic assessment element, and the corresponding zoning grade is obtained by means of grid data processing through computer program. The practical situation of the evaluation area is exactly reflected from the characteristic value of grade. The application practice proves that the extenics method is feasible in risk zoning of geological disaster in Xiangjiahe Bridge bank of Three Gorges Reservoir area in Zhongxian County of Chongqing.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2007年第11期2445-2450,共6页
Rock and Soil Mechanics
基金
国家自然科学基金(No.40472136)
教育部资助优秀年轻教师基金项目(No.120413133)资助
吉林大学985工程资助
关键词
可拓方法
地质灾害
评价指标
危险性分区
extenics method
geological disaster
evaluation indexes
risk zoning evaluation
