| 直剪条件下非贯通节理岩体岩桥力学性质弱化机制及贯通模型初步研究 |
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| 引用本文： | 刘远明,夏才初.直剪条件下非贯通节理岩体岩桥力学性质弱化机制及贯通模型初步研究[J].岩土力学,2010,31(3):695-701. |
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| 作者姓名： | 刘远明 夏才初 |
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| 作者单位： | 1. 贵州大学 土木建筑工程学院，贵阳 550003；2. 同济大学 地下建筑与工程系，上海 200092 |
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| 基金项目： | 贵州大学引进人才科研基金，国家自然科学基金项目 |
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| 摘 要： | 通过非贯通节理岩体直剪试验的力学特点和理论分析，修正了Lajtai岩桥张拉破坏理论。通过非贯通节理岩体直剪试验中岩桥的应力状态，提出岩桥内部的张拉破坏使岩桥力学性质发生弱化，并进一步分析研究了力学性质可能弱化的区域。分析非贯通节理岩体扩展贯通过程，提出了非贯通节理岩体的贯通破坏模式。通过非贯通节理岩体直剪试验初步验证了修正的岩桥张拉破坏理论和贯通破坏模式。
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| 关 键 词： | 岩桥 节理岩体 直剪试验 Lajtai岩桥理论 贯通破坏模式 |
| 收稿时间： | 2008-07-29 |
Weakening mechanism of mechanical behaviors and failure models of rock mass containing discontinuous joints under direct shear condition |
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| LIU Yuan-ming,XIA Cai-chu.Weakening mechanism of mechanical behaviors and failure models of rock mass containing discontinuous joints under direct shear condition[J].Rock and Soil Mechanics,2010,31(3):695-701. |
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| Authors: | LIU Yuan-ming XIA Cai-chu |
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| Institution: | 1. College of Civil Construction Engineering, Guizhou University, Guiyang 550003, China; 2. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China |
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| Abstract: | The mechanical behaviors of rock mass containing discontinuous joints under direct shear condition and the mechanical theory are analyzed; Lajtai’s tension failure theory of rock bridge is modified. It is proposed that the tension failure in rock bridge weakens the mechanical behavior after analyzing the stress state of rock bridge. The region of the weakened mechanical behavior is also pointed out. According to its failure process, the failure models of rock mass containing discontinuous joints are suggested. The modified failure theory of rock bridge and suggested failure models are verified through direct shear test. |
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| Keywords: | rock bridge jointed rock mass direct shear test Lajtai's theory of rock bridge failure model |
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