院报 ›› 2014, Vol. 31 ›› Issue (9): 47-53.DOI: 10.3969/j.issn.1001-5485.2014.09.009

• 岩土工程 • 上一篇    下一篇

水力作用下缓倾顺层岩质边坡滑移破坏机制分析

谭龙金1，张海娜2，盛韩微3，夏开宗4   

  1. 1.贵州大学 土木建筑工程学院，贵阳 550003；
    2.武汉理工大学 资源与环境工程学院，武汉 430070；
    3.北京工业大学 建筑工程学院， 北京 100124; 4.中国科学院 武汉岩土力学研究所 岩土力学与工程国家重点试验室，武汉 430071
  • 收稿日期:2013-07-08 修回日期:2014-09-04 出版日期:2014-09-01 发布日期:2014-09-04
  • 通讯作者: 张海娜(1992－)，女，河北邢台人，本科生，主要从事边坡稳定性、矿山沉降方面的研究工作，(电话)18271825180(电子信箱)xiakaizhong1988@sina.com。
  • 作者简介:谭龙金(1979-)，男，贵州盘县人，讲师，硕士研究生，主要从事水利工程、岩土工程等方面教学与研究工作，(电话)13809480336(电子信箱)tlj5553@163.com。

Mechanism of Bedding-Slip Failure of Gently Inclined Rock Slope Due to Hydraulic Pressure

AN Long-jin1, ZHANG Hai-na2,SHENG Han-wei3, XIA Kai-zong4   

  1. 1.College of Civil and Architecture Engineering, Guizhou University, Guiyang 550003,China;
    2.School of Resources and Environmental Engineering,Wuhan University of Technology, Wuhan 430070, China;
    3.School of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, China;
    4.State Key Laboratory of Geomechanics and Geotechnical Engineering,Institute of Rock and Soil Mechanics,Chinese Academy of Sciences,Wuhan 430071,China
  • Received:2013-07-08 Revised:2014-09-04 Online:2014-09-01 Published:2014-09-04

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摘要： 顺层岩质边坡的稳定性主要取决于滑动面的物理力学性质和地下水对边坡岩体的水压力。通过对缓倾顺层岩质边坡中的地下水力作用进行分析，在建立出流缝未被堵塞和出流缝被堵塞2种情况下的边坡水力学分析模型的基础上，推导出了边坡稳定系数和张裂隙临界充水高度的表达式，从而建立了边坡滑移破坏判据，认为当张裂隙充水高度或临界降雨强度达到临界值后，边坡在水力作用下将发生滑移破坏。选取实际边坡进行计算和分析，验证了公式的合理性，结果表明顺层边坡滑移破坏的实现取决于外界水力作用的触发，边坡稳定性系数的降低主要与张裂缝中的静水压力和滑动面上的静水压力有关，而动水压力的影响很小。其成果对设计和施工有重要的指导意义。

关键词: 边坡工程, 岩质边坡, 缓倾顺层, 水力作用, 稳定性

Abstract: The stability of bedding rock slope is mainly affected by the physico-mechanical properties of slide face and the groundwater pressures on slope rock. On the basis of analysing the groundwater pressure, we established the hydrostatic pressure model of rock bedded slope in two cases (blocked outflow seam and unblocked outflow seam). Subsequently we derived the formulas for calculating slope stability coefficient and critical water height in separation fracture, and put forward the criterion for bedding-slip failure of rock slope. According to the criterion, slope will lose its stability once the water height of separation fracture or the critical rainfall intensity reaches a critical value. Calculation example verified the rationality of the proposed formulas. Results also reveal that the decrease in slope stability under the influence of groundwater is mainly related to hydrostatic pressure and uplift force instead of groundwater penetration. The results provide important guide for engineering design and construction.

Key words: slope engineering, rock slope, gently inclined bedded, hydraulic pressure, stability

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