| 区域非稳定动力学环境下的岩体松动效应 |
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| 引用本文： | 马润勇,彭建兵,周立新,门玉明,毛彦龙,李喜安.区域非稳定动力学环境下的岩体松动效应[J].工程地质学报(英文版),2007,15(4):475-482. |
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| 作者姓名： | 马润勇 彭建兵 周立新 门玉明 毛彦龙 李喜安 |
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| 作者单位： | 1.长安大学地质工程与测绘工程学院,西安710054; |
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| 基金项目： | 国家自然科学基金重点项目(编号:40534021)，国家西部交通建设科技项目(编号:200431881212). |
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| 摘 要： | 区域非稳定动力学环境下,长期的构造变形、重力卸荷以及地震动力作用的共同影响,可以导致岩体发生大范围变形、松动。松动岩体内发育大量的软弱结构面,且表现出整体破碎、松弛严重、透水强烈,张性节理裂隙发育、地表裂缝较发育、岩体地震动力破坏信息反映明显等特征。岩体的变形松动可以分为卸荷变形松动、倾倒变形松动、顺层滑移松动、断层控制松动、节理裂隙控制松动等5种模式。岩体的物理振动试验结果表明,地震动力是造成岩体松动的主因。数值模拟结果表明,在单纯自重应力影响作用下,松动岩体不会出现大面积的失稳破坏现象,但在地震动力作用下,松动岩体会发生大面积屈服破坏。
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| 关 键 词： | 松动岩体 松动模式 表现特征 振动试验 数值模拟 |
| 文章编号： | 1004-9665/2007/15(04)-0475-08 |
| 收稿时间： | 2006-10-10 |
| 修稿时间： | 2006-10-102007-01-20 |
RELAXED EFFECT OF ROCK MASS IN DYNAMIC CONDITIONS OF REGIONAL INSTABILITY |
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| MA Runyong,PENG Jianbing,ZHOU Lixin,MEN Yuming,MAO Yanlong,LI Xi''''an.RELAXED EFFECT OF ROCK MASS IN DYNAMIC CONDITIONS OF REGIONAL INSTABILITY[J].Journal of Engineering Geology,2007,15(4):475-482. |
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| Authors: | MA Runyong PENG Jianbing ZHOU Lixin MEN Yuming MAO Yanlong LI Xi'an |
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| Institution: | 1.College of Geology Engineering and Geomatics,Chang’an University,Xi’an 710054;2.Key Laboratory of Western China’s Mineral Resources and Geological Engineering,Ministry of Education,Xi’an 710054;3.Open Research Laboratory of Geotechnical Engineering,The Ministry of Land Resources,Xi’an 710054;4.Air Force Engineering Design &|Research Institute,Beijing 100068 |
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| Abstract: | Collective effect of long-term structure deformation,unloading and earthquake can result in large-scale deformation and looseness of rock mass under the dynamic condition of regional stability.Large number of weak structural planes developed in relaxed rock mass.The rock mass is completely cracked,very relaxed,highly permeable.Much open-joint and ground fissure exist in the rock mass.The information of the rock breakage is very distinct under the paleo-earthquake.Deformation-relaxed types of relaxed rock mass may be divided simply into five models:i.e.unloading deform-relaxation,toppling deform-relaxation,bedding-slip relaxation,deform-relaxation controlled by faults and relaxation controlled by cranny /joint.The vibration test of dynamic models of rock mass indicates that the earthquake power is the main factor of relaxed effect of the rock mass.The result of numerical simulation shows that large-scale Instability and failure would not occur in the relaxed rock mass under self-weight stress,but it would occur under the earthquake power. |
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| Keywords: | Relaxed rockmass Relaxed model Expression characteristic Vibration test Merical simulation |
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