水力作用下缓倾顺层岩质边坡滑移破坏机制分析

谭龙金; 张海娜; 盛韩微; 夏开宗

doi:10.3969/j.issn.1001-5485.2014.09.009

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

岩土工程

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

作者信息 +

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

Author information +

文章历史 +

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。

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.

导出引用

谭龙金，张海娜，盛韩微，夏开宗. 水力作用下缓倾顺层岩质边坡滑移破坏机制分析[J]. 长江科学院院报. 2014, 31(9): 47-53 https://doi.org/10.3969/j.issn.1001-5485.2014.09.009

AN Long-jin, ZHANG Hai-na,SHENG Han-wei, XIA Kai-zong. Mechanism of Bedding-Slip Failure of Gently Inclined Rock Slope Due to Hydraulic Pressure[J]. Journal of Changjiang River Scientific Research Institute. 2014, 31(9): 47-53 https://doi.org/10.3969/j.issn.1001-5485.2014.09.009

中图分类号： P642

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