Analysis of stability diagram of rock bedded slope under hydraulic pressure

XIA Kai-zong; CHEN Cong-xin; LU Zu-de; SONG Ya-fen; ZHOU Yi-chao; LUO Xin-ting

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Analysis of stability diagram of rock bedded slope under hydraulic pressure

更新时间：2026-06-25

- Analysis of stability diagram of rock bedded slope under hydraulic pressure
- Vol. 35, Issue 10, (2014)
- 作者机构：
  
  1. 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实验室,武汉,430071
  2. 贵州大学土木建筑工程学院,贵阳,550033
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU457
- Online First：27 October 2014，
  
  Published：2014
- 稿件说明：
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XIA Kai-zong, CHEN Cong-xin, LU Zu-de, et al. Analysis of stability diagram of rock bedded slope under hydraulic pressure[J]. 2014, 35(10).
DOI：

XIA Kai-zong, CHEN Cong-xin, LU Zu-de, et al. Analysis of stability diagram of rock bedded slope under hydraulic pressure[J]. 2014, 35(10). DOI：

摘要

通过分析顺层岩质边坡中的水力作用，建立了出流缝未被堵塞和出流缝被堵塞两种情况下顺层岩质边坡的水力学模型；推导出了用无量纲参数（Q、P、S）形式表达的边坡稳定性安全系数Fs的表达式；绘制了边坡后缘张裂隙充满水后几何要素岩层倾角?、张裂缝高度Z/边坡高度H与无量纲参数（Q、P、S）的关系曲线，能为分析不同的边坡几何要素、水深、不同抗剪强度对边坡稳定性的影响提供方便。选取宜巴高速公路典型顺层岩质边坡进行研究，结果表明：对于出流缝未被堵塞的情况，水力作用使边坡稳定性安全系数降低程度为33.33%，是触发顺层岩质边坡滑移破坏的主要因素；出流缝被堵塞情况下边坡稳定性安全系数要比出流缝未被堵塞情况下约降低0.458。其研究成果对顺层岩质边坡工程设计和施工优化具有重要指导意义。

Abstract

By analyzing the effect of groundwater on rock bedded slope

the hydraulic pressure model of rock bedded slope in both cases that the outflow seam is blocked or not are established. Then the slope stability is presented and organized into a dimensionless （Q、P、S）form of expression; curve of relationship between geometric elements and dimensionless variables（Q、P、S）is drawn when the splay fracture in the tailing edge of slope is filled with water

which can bring convenience for analyzing the influence of different geometric elements

water depth

different shear strengths of rock mass on the stability of the slope. By using the relation curve

the effect mechanism of hydraulic pressure on actual bedding rock slope stability is discussed. It is shown that: the effect of hydraulic pressure on slope stability is considerably significant. For example

the safety factor is reduced by 33.33% owing to the effect of hydraulic pressure in the case of the outflow seam unblocked

which is the main external factors triggering the failure of bedding slope；and the safety factor on rock bedded slope in the case of the outflow seam is blocked reduced by about 0.458 than that the outflow seam isn't blocked. The results can provide an important guide to engineering design and construction of rock bedded slope.

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