平面滑动型边坡极限倾角的研究
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摘要
对于平面滑动型的岩质边坡,结构面对边坡的稳定性起着控制作用。在边坡设计分析过程中,如果边坡内没有确定的滑面,或者对坡体内结构面情况不明的情况下,通过对最不利滑面的极限倾角进行估算,可以作为边坡稳定性分析的依据。对传统的估算公式进行了改进,综合考虑到重力和地震的影响,分别通过极限坡高和极限安全系数给出边坡最危险滑面的极限倾角的计算公式。经过对比与分析,得出两种方法各自的适用条件。
For the rock slope with planar failure surface,the structural plane plays a controlling role in the stability of slope.In the process of design and analysis,if the planar failure appears without fixed plane in rock slope,the critical inclination of failure face can be used as the basis for analyzing the slope stability.The traditional estimation formula is optimized.Considering the effects of gravity and earthquakes,two formulae for calculating the critical inclination of failure face are given respectively.One is based on the limit height of slope,and the other is based on the limit factor of safety.Through comparison and analysis,their advantages and disadvantages are obtained.
For the rock slope with planar failure surface,the structural plane plays a controlling role in the stability of slope.In the process of design and analysis,if the planar failure appears without fixed plane in rock slope,the critical inclination of failure face can be used as the basis for analyzing the slope stability.The traditional estimation formula is optimized.Considering the effects of gravity and earthquakes,two formulae for calculating the critical inclination of failure face are given respectively.One is based on the limit height of slope,and the other is based on the limit factor of safety.Through comparison and analysis,their advantages and disadvantages are obtained.
引文
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[5]李海波,肖克强,刘亚群.地震荷载作用下顺层岩质边坡安全系数分析[J].岩石力学与工程学报,2007,12(26):2385–2394.(LI Hai-bo,XIAO Ke-qiang,LIU Ya-qun.Factor of safety analysis of bedding rock slope under seismic load[J].Chinese Journal of Rock Mechanics and Engineering,2007,12(26):2385–2394.(in Chinese))
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[7]何蕴龙,陆述远.岩石边坡地震作用近似计算方法[J].岩土工程学报,1998,20(2):66–68.(HE Yun-long,LU Shu-yuan.A method for calculating the seismic action in rock slope[J].Chinese Journal of Geotechnical Engineering,1998,20(2):66–68.(in Chinese))
[2]HEOK J,BRAY W.岩石边坡工程[M].卢世宗译.北京:冶金工业出版社,1983.(HEOK J,BRAY W.The rock slope engineering[M].LU Shi-zong trans.Beijing:China Metallurgical Industry Press,1983.(in Chinese))
[3]舒继森,才庆祥,王成龙,等.岩石边坡平面滑动时的临界滑面倾角的探讨[J].中国矿业大学学报,2006,35(4):437–440.(SHU Ji-sen,CAI Qing-xiang,WANG Cheng-long,et al.Inquire into critical inclination of failure face in rock slope with planar failure[J].Journal of China University of Mining&Technology,2006,35(4):437–440.(in Chinese))
[4]蒋斌松,蔡美峰,都浩.平面滑动边坡稳定性的解析计算[J].岩石力学与工程学报,2004,23(1):91–94.(JIANG Bin-song,CAI Mei-feng,DU Hao.Analytical calculation on stability of slope with planar failure surface[J].Chinese Journal of Rock Mechanics and Engineering,2004,23(1):91–94.(in Chinese))
[5]李海波,肖克强,刘亚群.地震荷载作用下顺层岩质边坡安全系数分析[J].岩石力学与工程学报,2007,12(26):2385–2394.(LI Hai-bo,XIAO Ke-qiang,LIU Ya-qun.Factor of safety analysis of bedding rock slope under seismic load[J].Chinese Journal of Rock Mechanics and Engineering,2007,12(26):2385–2394.(in Chinese))
[6]祁生文,伍法权,等.地震边坡稳定性的工程地质分析[J].岩石力学与工程学报,2004,23(16):2792–2797.(QI Sheng-wen,WU Fa-quan,et al.Engineering geology analysis on stability of slope under earthquake[J].Chinese Journal of Rock Mechanics and Engineering,2004,23(16):2792–2797.(in Chinese))
[7]何蕴龙,陆述远.岩石边坡地震作用近似计算方法[J].岩土工程学报,1998,20(2):66–68.(HE Yun-long,LU Shu-yuan.A method for calculating the seismic action in rock slope[J].Chinese Journal of Geotechnical Engineering,1998,20(2):66–68.(in Chinese))
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