地学前缘 ›› 2009, Vol. 16 ›› Issue (6): 113-119.

• 论文 • 上一篇    下一篇

三峡库区凤城危岩稳定性评价与防治对策研究

张彬,李亚玲,慎乃齐,康向阳,覃祖淼   

  1. 1中国地质大学(北京) 工程技术学院, 北京 100083
    2中航勘察设计研究院, 北京 100098
  • 收稿日期:2009-03-10 修回日期:2009-01-15 出版日期:2009-12-16 发布日期:2009-12-10
  • 作者简介:张彬(1975—)，男，博士，副教授，主要从事工程地质、岩土工程相关科研及教学工作。Email：sc_zhb@163.com
  • 基金资助:

    国家自然科学基金项目(40902086)；水利部岩土力学与工程重点实验室开放基金项目(G0708)；中国地质大学（北京）科学基金项目(2007019)

A study of the stability assessment and treatment of dangerous rock in Fengcheng town of the Three Gorges Reservoir area.

 ZHANG Ban, LI E-Ling, SHEN Ai-Ji, KANG Xiang-Yang, QIN Jie-Miao   

  1. 1School of Engineering and Technology, China University of Geosciences(Beijing), Beijing 100083, China
    2Institute of Geotechnical Engineering, China Aviation Survey and Design Institute, Beijing 100098, China
  • Received:2009-03-10 Revised:2009-01-15 Online:2009-12-16 Published:2009-12-10

PDF (PC)

757

摘要：

危岩失稳是三峡库区频发的地质灾害之一。文章在研究凤城危岩所处区域的地质背景条件及危岩失稳的诱发因素基础上,分析了凤城镇危岩体的分布规律及形态特征,根据破坏模式的不同对该区危岩进行了类型划分,采用赤平投影法与极限平衡法对该区6个代表性危岩单体的稳定状况进行定性与定量分析评价,经分析判断其均处于欠稳定或不稳定状态,需进行工程治理。针对每个危岩单体的具体特征,提出了小规模清方+岩体支撑+锚固,配合地表排水及裂隙封闭的联合治理方案。

关键词: 三峡库区;危岩体;失稳模式;稳定性分析;治理对策

Abstract:

The failure of dangerous rock is one of the geological disasters that occurs frequently in the Three Gorges Reservoir area. Based on the study  of geological background conditions and the factors inducing the failure of dangerous rocks, this paper explains the distribution and morphological characteristics of dangerous rocks in Fengcheng town, provides the classification of  the failure modes of the dangerous rocks in this area, and analyses the stabilities of six representative monomers of dangerous rocks qualitatively by stereographic projection method and quantitatively by limit equilibrium method. The results of the study show that all of the six dangerous rocks are instable or metastable, therefore, the control measures on them must be taken. The joint  controlling measures of smallscale earthwork, rockside support and anchorage, with surface drainage and closing fissures are put forward.

Key words:  Three Gorges Reservoir area; dangerous rock; failure mode; stability analysis; control measures