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

AN Long-jin; ZHANG Hai-na; SHENG Han-wei; XIA Kai-zong

doi:10.3969/j.issn.1001-5485.2014.09.009

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Journal of Changjiang River Scientific Research Institute ›› 2014, Vol. 31 ›› Issue (9) : 47-53. DOI: 10.3969/j.issn.1001-5485.2014.09.009

ROCKSOIL ENGINEERING

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

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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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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

References

[1] 夏开宗,陈从新,鲁祖德,等. 软硬岩互层边坡稳定性的敏感性因素分析[J].武汉理工大学学报(交通科学与工程版),2013,(4):729-732. (XIA Kai-zong, CHEN Cong-xin, LU Zu-de, et al.Analysis of Sensitivity Factors to Stability of Inter-beddings of Soft and Hard Rock Slope[J]. Journal of Wuhan University of Technology (Transportation Science & Engineering), 2013,(4):729-732. (in Chinese))
[2] 夏开宗,盛韩微,江忠潮. 声发射的边坡灾害无线智能监控预警系统[J].中华建设,2011,(11):131-133. (XIA Kai-zong, SHENG Han-wei, JIANG Zhong-chao.The Intellectual Monitoring and Pre-warning System of Sloping Disaster Based on Acoustic Emission [J]. China Construction,2011,(11):131-133. (in Chinese))
[3] 刘军,秦四清,张倬元. 缓倾角层状岩体失稳的尖点突变模型研究[J]. 岩土工程学报,2001,23(1) : 42-44.(LIU Jun, QIN Si-qing, ZHANG Zhuo-yuan. Study on Catastrophic Model with Cusp Point for Failure of Stratified Rock Mass with a Gentle Inclination [J]. Chinese Journal of Geotechnical Engineering, 2001,23(1): 42-44.(in Chinese))
[4] 杨治林. 地下水作用下复合介质边坡岩体的位移判据研究[J] . 岩石力学与工程学报,2003,22(5): 820-823.(YANG Zhi-lin. Research on Displacement Criterion for Compound Rock Mass Slope Affected by Groundwater [J]. Chinese Journal of Rock Mechanics and Engineering, 2003,22(5) : 820-823.(in Chinese))
[5] 龙辉,秦四清,万志清. 降雨触发滑坡的尖点突变模型[ J] . 岩石力学与工程学报,2002,21(4):502-508.(LONG Hui,QIN Si-qing,WAN Zhi-qing. Catastrophe Analysis of Rainfall-induced Landslides [J]. Rock and Soil Mechanics, 2002,21(4) :502-508.(in Chinese))
[6] 胡其志,周辉,肖本林,等. 水力作用下顺层岩质边坡稳定性分析[J].岩土力学,2010, 31(11):3594-3598(HU Qi-zhi, ZHOU Hui, XIAO Ben-lin, et al.Analysis of Stability Rock-bedded Slope under Hydraulic Pressure [J]. Rock and Soil Mechanics, 2010, 31(11):3594-3598.(in Chinese))
[7] 于德海,彭建兵. 降雨触发山区公路边坡失稳的气象判据研究[ J] . 水土保持通报,2010,30(4) : 125-128.(YU De-hai, PENG Jian-bin. Meteorological Criterion of Highway Slope Failure Induced by Rainfall in Mountainous Areas [J]. Bulletin of Soil and Water Conservation,2010,30(4) : 125-128.(in Chinese))
[8] 舒继森,唐震,才庆祥. 水力学作用下顺层岩质边坡稳定性研究[J].中国矿业大学学报,2012,41(4):521-525.(SHU Ji-sen, TANG Zhen,CAI Qing-xiang.Research on Stability of Bedding Rock Slopes under Hydraulic Pressure [J]. Journal of University of Mining & Technology, 2012,41(4):521-525. (in Chinese))
[9] 刘才华,徐健,曹传林, 等. 岩质边坡水力驱动型顺层滑移破坏机制分析[J]. 岩石力学与工程学报,2005,24(19):3529-3533. (LIU Cai-hua,XU Jian,CAO Chuan-lin,et al.Analysis of Bedding-slip Failure Mechanism of Rock Slope due to Hydraulic Drive[J]. Chinese Journal of Rock Mechanics and Engineering,2005,24(19):3529-3533.(in Chinese))
[10]刘才华,陈从新. 层状岩质边坡稳定性 [R]. 武汉:中国科学院武汉岩土力学研究所,2012. (LIU Cai-hua,CHEN Cong-xin. Stratified Rock Slope Stability [M]. Wuhan:Institute of Rock and Soil Mechanics of Chinese Academy of Sciences,2012.(in Chinese))
[11]刘才华. 岩质顺层边坡水力特性及双场耦合研究 [D]. 武汉:中国科学院武汉岩土力学研究所,2006.(LIU Cai-hua. Research on Hydraulic and Sires-seepage Coupling Properties of Rock Bedding Slopes [D]. Wuhan:Institute of Rock and Soil Mechanics of Chinese Academy of Sciences,2006.(in Chinese))
[12]HOEK E, BRAY J W. Rock Slope Engineering (Revised Second Edition)[M]. London: Institution of Mining and Metallurgy, 1977.
[13]何满朝,姚爱军,鹿粗,等. 边坡岩体水力学作用的研究[J]. 岩石力学与工程学报,1998,17(6): 662-666. (HE Man-chao,YAO Ai-jun,LU Cu, et al.Study of Mechanical Functions of Underground Water in Slope Rock Mass[J]. Chinese Journal of Rock Mechanics and Engineering,1998,17(6):662-666.(in Chinese))
[14]舒继森, 王兴中, 周义勇. 岩石边坡中滑动面水压分布假设的改进[J]. 中国矿业大学学报, 2004, 33(5): 509-512 . (SHU Ji-sen, WANG Xing-zhong, ZHOU Yi-yong. Improving on Assumption for Water Pressure Distributing on Failure Surface in Rock Slope[J]. Journal of China University of Mining & Technology, 2004, 33(5): 509－512.(in Chinese))
[15]雷谦荣.边坡中地下水压力问题的探讨[J].工程勘察,1997,(1):29-32. (LEI Qian-rong.Discussion on the Issue of Underground Pressure in Slope [J]. Engineering Survey,1997,(1):29-32.(in Chinese))
[16]JTJ018—97,公路排水设计规范[S]. 北京:人民交通出版社,1997. (JTJ018—97,Specifications of Drainage Design for Highways[S]. Beijing:China Communications Press,1997.(in Chinese))