土工基础

›› 2016, Vol. 30 ›› Issue (2): 131-135.

• 工程实录 • 上一篇    下一篇

湘南煤系地层边坡稳定性分析及案例研究

郑一晨1，2,张可能1,2   

  1. （1.有色资源与地质灾害探查湖南省重点实验室，长沙 410083；
    2.中南大学地球科学与信息物理学院地质工程系，长沙 410083）
  • 收稿日期:2015-03-09 出版日期:2016-04-20 发布日期:2016-04-27
  • 作者简介:郑一晨(1990-),男,硕士研究生,研究方向为岩土工程。

Case History of Stability Evaluation of Soil Slopes with Coal Lenses

ZHENG Yichen1,2, ZHANG Keneng1,2   

  1. （1.Key Laboratory of NonFerrous Resources and Geological Hazard Exploration, Changsha 410083;
    2.Department of Geological Engineering, School of Geosciences and InfoPhysics, Central South University, Changsha 41008）
  • Received:2015-03-09 Online:2016-04-20 Published:2016-04-27

摘要： 长期以来,在郴州地区城市建设发展过程中，边(滑)坡地质灾害问题十分突出。其中，煤系土边(滑)坡工程案例在郴州地区最为常见，煤系土具有岩层软硬不均、层间胶结较差、结构松散、开挖后风化速度较快且遇水易软化、性能极不稳定和结构易破坏而丧失强度等特点。通过对郴州煤系土边（滑）坡工程案例分析和经验总结，针对性研究煤系土边坡特殊的破坏模式及其影响因素，本文以郴州市同心桥边（滑）坡治理工程为例，从边坡过程稳定性控制分析，重“防”甚于“治”，提出最优化设计方案。

关键词: 煤系地层, 稳定性, 郴州地区

Abstract: The slope stability (landslide) related geohazards are frequently encountered in the projects in the development of the Chenzhou area. One of the most frequently occurred instabilities in the project developments occurred in soil slopes with coal mine lens. The soil slopes with coal mine lenses have the characteristics of unevenly distributed stiffness among different strata; poor cementation between different soil layers, loose in density; prone to slaking in the ambient air and water; unstable properties in strength and in the fabrics. This paper summarizes the experience grain from the stability evaluation projects in soil slopes with coal mine lenses. The failure modes of the coal mine lens slopes and their influence factors are also presented in the paper. A landslide mitigation project at Tongxinqiao is presented in the paper. The optimized scheme is focused on the "prevention" of the instability in additional to the "remediation".

Key words: Coal Mine Strata, Stability Evaluations, Chenzhou Area