土工基础

›› 2015, Vol. 29 ›› Issue (4): 90-93.

• 工程实录 • 上一篇    下一篇

珠三角地区岩溶塌陷形成机理及易发性评价——以肇庆为例

王忠忠   

  1. （广东省地质调查院，广州 510080）
  • 收稿日期:2015-03-31 出版日期:2015-08-20 发布日期:2015-11-06
  • 作者简介:王忠忠(1982-)，男，工程师，研究方向为水工环地质调查。
  • 基金资助:

    基金项目：中国地质调查局项目(编号12120114022301)

Karst Sinkhole Hazard Evaluation of Zhaoqing City, Pearl River Delta

WANG Zhongzhong   

  1. (Guangdong Geologic Survey Institute, Guangzhou 510080)
  • Received:2015-03-31 Online:2015-08-20 Published:2015-11-06

摘要： 岩溶塌陷是珠三角西部城市肇庆市的第四系覆盖区主要地质灾害之一。分析了肇庆地区地质环境背景，根据已发岩溶塌陷形成原因归纳总结出该地区三种岩溶塌陷机理模式。同时，对可溶岩地区剖分成7092个网格作为评价单元，选取地层岩性、岩溶发育程度、地下水活动、覆盖层条件和地质构造作为评价因子，采用综合指数法对肇庆地区进行岩溶塌陷易发性评价，以期为肇庆地区岩溶塌陷防治提供决策依据。

关键词: 岩溶塌陷, 肇庆地区, 形成机理, 易发性评价

Abstract: Sinkhole is one of the major geological hazards in Quaternary Soils that covering Zhaoqing, a city in the west Pearl River Delta area. This paper summarizes three typical sinkhole collapse modes based on the observed sinkholes in the Zhaoqing City as well as the geological conditions. The entire karst area is divided into 7092 grids as the evaluation units. In each unit, the soil and rock strata; degree of karst development; groundwater activities as well as the tectonic structure are factored. The likelihood of the sinkhole collapses are evaluated by using a comprehensive indices.

Key words: Sinkhole Collapse, Zhaoqing Area, Sinkhole Collapse Modes, Collapse Evaluation