Geological disaster risk zoning evaluation based on extenics method in bank near Xiangjiahe Bridge

SHANG Min1; 2; CHEN Jian-ping; WANG Zheng-liang; XIAO Yun-hua; WU Chun-yong

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Geological disaster risk zoning evaluation based on extenics method in bank near Xiangjiahe Bridge

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- Geological disaster risk zoning evaluation based on extenics method in bank near Xiangjiahe Bridge
- Vol. 28, Issue 11, (2007)
- 作者机构：
  
  1. 吉林大学建设工程学院,长春,130026
  2. 三峡大学地质灾害防治研究院,湖北,宜昌,443002
  3. 中航第四航务勘察设计院有限公司,广州,510230
- 作者简介：
- 基金信息：
- DOI：
  CLC： P694
- Online First：18 October 2013，
  
  Published：2007
- 稿件说明：
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SHANG Min1, 2, CHEN Jian-ping, et al. Geological disaster risk zoning evaluation based on extenics method in bank near Xiangjiahe Bridge[J]. 2007, 28(11).
DOI：

SHANG Min1, 2, CHEN Jian-ping, et al. Geological disaster risk zoning evaluation based on extenics method in bank near Xiangjiahe Bridge[J]. 2007, 28(11). DOI：

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。

Abstract

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 m2 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.

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