长江科学院院报 ›› 2015, Vol. 32 ›› Issue (10): 65-69,73.DOI: 10.11988/ckyyb.20140720

• 岩土工程 • 上一篇    下一篇

锦屏水电站料场边坡变形特征与   破坏机制分析

黄志鹏1,唐辉明2,董志宏1,尹健民1,郭喜峰1,2   

  1. 1.长江科学院 水利部岩土力学与工程重点实验室,武汉 430010;
    2.中国地质大学(武汉) 工程学院,武汉 430074
  • 收稿日期:2014-08-20 出版日期:2015-10-20 发布日期:2015-10-15
  • 作者简介:黄志鹏(1965-),男,四川遂宁人,高级工程师,硕士,主要从事岩土工程试验及安全监测分析方面的工作,(电话)13708325319(电子信箱)zhipenghuang@163.com。
  • 基金资助:
    国家重点基础研究发展计划(973)项目(2011CB710603);中央级公益性科研院所基本科研业务费项目(CKSF2014065)

Deformation Characteristics and Failure Mechanism of Material-yard Slope at Jinping Hydropower Station

HUANG Zhi-peng1,TANG Hui-ming2,DONG Zhi-hong1,YIN Jian-min1,GUO Xi-feng1,2   

  1. 1.Key Laboratory of Geotechnical Mechanics and Engineering of the Ministry of Water Resources, Yangtze River Scientific Research Institute, Wuhan 430010,China; 2.Faculty of Engineering, China University of Geosciences,Wuhan 430074, China
  • Received:2014-08-20 Online:2015-10-20 Published:2015-10-15

摘要: 锦屏一级水电站大奔流料场高边坡断层及结构面发育,开挖高度巨大,边坡变形特征及破坏机制十分复杂。在工程地质分析的基础上,采用数值计算,分析了边坡变形特征、破坏机制,评价了边坡稳定性。研究表明:边坡开挖变形以卸荷回弹为主,竖向变形大于水平变形,层间错动带及陡倾断层错动变形较大;浅部的层间错动面多处于剪切极限状态和不连续张开状态;边坡局部存在塑性破坏区,主要分布于薄层砂板岩、剪切错动带及坡体浅表,以拉伸破坏为主,少量剪切破坏;边坡潜在破坏机制为溃屈破坏。开挖后的边坡安全系数满足规范要求。

关键词: 锦屏水电站, 高边坡, 工程地质分析, 数值计算, 变形特征, 破坏机制

Abstract: Due to developed faults and structural planes and huge excavation height, the deformation and failure mechanisms of the high slope at Dabenliugou quarry of Jinping-ⅠHydropower Station are complicated. On the basis of engineering geological analysis, we analysed the deformation features and failure mechanism of the slope, and assessed the slope’s stability through numerical calculations. Results showed that: 1) unloading rebound is the major form of slope deformation, and vertical deformation is greater than horizontal deformation, the sliding deformations of interlayer staggered surface and steep dip fault are large, and shallow interlayer staggered surface is mostly in shear limit state and discontinuous opening state; 2) partial plastic zone (largely in tensile failure and a bit shear failure) mainly distributes in thin sandy slate, interlayer shear zone and the slope’s shallow surface; 3) the failure mechanism of high slope of Dabenliugou quarry is buckling failure; 4) the safety factor of slope after excavation meets standard requirements.

Key words: Jinping hydropower station, high slope, engineering geology analysis, numerical simulation, deformation characteristics, failure mechanism

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