岩溶地区陡峭岩质高边坡动力稳定性分析
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摘要
以长沙冰雪大世界矿坑工程为例,采用现场测量和室内数值分析相结合的方法,展开了对陡峭岩质高边坡动力稳定性的研究,研究结果表明:(1)边坡爆破开挖下,无溶洞相比有溶洞坡顶沉降小;(2)边坡爆破开挖下,边坡内溶洞直径越小,边坡的稳定系数越高,边坡越稳定;(3)溶洞距离爆破坡面越远,边坡稳定性越好,但超过一定范围对边坡稳定性无影响;(4)若溶洞正好穿过滑动面,不利于边坡爆破开挖的稳定,边坡稳定系数会降低。
As an example of the Changsha Ice and Snow World Pit Project, a combination method of testing and numerical analysis is carried out to study the dynamic stability of steep rock high slopes. The results are as follows:(1) Under the blasting excavation of the slope, the settlement of the non-karst cave is smaller than that of the karst cave;(2) Under the blasting excavation of slope, the smaller the diameter of the cave in the slope, the higher the stability coefficient and the more stable on the slope;(3) The karst cave is farther from the blasting slope face, the slope is more stability. But the distance between the karst cave and blasting slope face no more than a certain range has no effect on the slope stability;(4) If the cave is just passing through the sliding surface, it is not conducive to the stability of the slope blasting excavation, and the slope stability coefficient will be reduced.
As an example of the Changsha Ice and Snow World Pit Project, a combination method of testing and numerical analysis is carried out to study the dynamic stability of steep rock high slopes. The results are as follows:(1) Under the blasting excavation of the slope, the settlement of the non-karst cave is smaller than that of the karst cave;(2) Under the blasting excavation of slope, the smaller the diameter of the cave in the slope, the higher the stability coefficient and the more stable on the slope;(3) The karst cave is farther from the blasting slope face, the slope is more stability. But the distance between the karst cave and blasting slope face no more than a certain range has no effect on the slope stability;(4) If the cave is just passing through the sliding surface, it is not conducive to the stability of the slope blasting excavation, and the slope stability coefficient will be reduced.
引文
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[8]徐奴文,唐春安,周钟,等.基于三维数值模拟和微震监测的水工岩质边坡稳定性分析[J].岩石力学与工程学报,2013, 32(7):1 373–1 381.
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[11]吴峰,冯晓,黄伟.渝东南岩溶地区公路边坡坍塌机理分析与应急加固措施[J].中外公路, 2013, 33(1):29–33.
[2]李宁,姚显春,张承客.岩质边坡动力稳定性分析的几个要点[J].岩石力学与工程学报, 2012, 31(5):873–881.
[3]廖少波.基于位移突变判据的岩质边坡动力稳定性研究[J].地下空间与工程学报, 2017, 13(z2):921–925.
[4]卞康,刘建,胡训健,等.含顺层断续节理岩质边坡地震作用下的破坏模式与动力响应研究[J].岩土力学,2018,39(8):3 029–3 037.
[5]陈训龙,龚文惠,钟旭晗,等.水平和竖向地震作用下顺层岩质边坡动力可靠性分析[J].土木工程学报,2017,50(10):91–98.
[6]范亚伦,张伟宾,周志军,等.含不连续面岩质边坡动力响应研究[J].铁道科学与工程学报,2017,14(6):1184–1191.
[7]徐奴文,梁正召,唐春安,等.基于微震监测的岩质边坡稳定性三维反馈分析[J].岩石力学与工程学报,2014,33(S1):3 093–3 103.
[8]徐奴文,唐春安,周钟,等.基于三维数值模拟和微震监测的水工岩质边坡稳定性分析[J].岩石力学与工程学报,2013, 32(7):1 373–1 381.
[9]徐树焕,刘静.公路岩质边坡爆破稳定性数值模拟分析研究[J].公路交通科技, 2015,(12):94–96.
[10]许红涛,卢文波,周创兵,等.基于时程分析的岩质高边坡开挖爆破动力稳定性计算方法[J].岩石力学与工程学报,2006, 25(11):2 213–2 219.
[11]吴峰,冯晓,黄伟.渝东南岩溶地区公路边坡坍塌机理分析与应急加固措施[J].中外公路, 2013, 33(1):29–33.