| 含共面结构面岩体的岩桥贯通准则研究 |
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| 引用本文： | 郭牡丹,朱浮声,王述红,张世超,张俊.含共面结构面岩体的岩桥贯通准则研究[J].岩土力学,2013,34(6):1598-1604. |
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| 作者姓名： | 郭牡丹 朱浮声 王述红 张世超 张俊 |
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| 作者单位： | 东北大学 资源与土木工程学院，沈阳 110819 |
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| 基金项目： | 国家自然科学基金资助项目 |
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| 摘 要： | 块体理论是一种比较常用的岩土工程稳定性分析方法，但缺乏对非贯通结构面的研究，导致搜索出的关键块体不够精准和全面。如何处理非贯通结构面，判断其是否应该连通成为块体理论研究至关重要的一个问题。采用数值模拟的方法计算含两共面结构面岩体试样在不同岩桥倾角、结构面摩擦系数、围压和连通率情况下的贯通强度与峰值强度。引入贯通系数变量，定量描述贯通强度与峰值强度之间的关系。将贯通强度作为判断岩桥贯通与否的一个衡量指标，建立起贯通强度与岩桥倾角、结构面摩擦系数、围压和连通率之间的函数，即含两条共面结构面岩体的岩桥贯通准则。该准则可准确判断含两条共面结构面岩体的岩桥是否应该连通。基于岩桥贯通准则的块体理论能够准确搜索出因岩桥贯通而滑移的关键块体。
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| 关 键 词： | 共面结构面 贯通强度 峰值强度 贯通准则 贯通系数 |
| 收稿时间： | 2012-07-15 |
Research on rock bridge coalescence law of rock mass containing coplanar structural planes |
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| GUO Mu-dan,ZHU Fu-sheng,WANG Shu-hong,ZHANG Shi-chao,ZHANG Jun.Research on rock bridge coalescence law of rock mass containing coplanar structural planes[J].Rock and Soil Mechanics,2013,34(6):1598-1604. |
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| Authors: | GUO Mu-dan ZHU Fu-sheng WANG Shu-hong ZHANG Shi-chao ZHANG Jun |
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| Institution: | School of Resources & Civil Engineering, Northeastern University, Shenyang 110819, China |
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| Abstract: | Block theory is a commonly used method in stability analysis of geotechnical engineering, but there is no research on non-coalescence structural planes, which makes the key block searching neither accurate nor adequate. It is an essential issue for block theory studies that how to deal with the non-coalescence structural planes and whether they should be connected. Coalescence strength and peak strength of rock samples containing two coplanar structural planes in different rock bridge angles, frictional coefficient of structural planes, lateral press, and connectivity rate are calculated through numerical simulation method. Coalescence coefficient is introduced to quantitatively describe the relationship between coalescence strength and peak strength. The coalescence strength is a standard to estimate whether the rock bridge is coalescent or not. The function is established between coalescence strength and rock bridge angle, frictional coefficient of structural planes, lateral press, and connectivity rate, which is the rock bridge coalescence law of rock mass containing two coplanar structural planes. The law can accurately determine that whether the rock bridge should be connected for the rock mass containing two coplanar structural planes. Key blocks, which are slipped due to rock bridge coalescence, are searched by block theory based on rock bridge coalescence law. |
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| Keywords: | coplanar structural planes coalescence strength peak strength coalescence law coalescence coefficient |
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