| Hoek-Brown岩石破坏经验判据确定岩石地基承载力的修正 |
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| 引用本文： | 李培勇,杨庆,栾茂田.Hoek-Brown岩石破坏经验判据确定岩石地基承载力的修正[J].岩土力学,2005,26(4):664-666. |
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| 作者姓名： | 李培勇 杨庆 栾茂田 |
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| 作者单位： | 大连理工大学,土木水利学院及海岸和近海工程国家重点实验室,大连,116024 |
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| 摘 要： | 岩石地基承载力的精确确定,对工程的安全性和经济性非常重要。简要介绍了Hoek-Brown岩石经验破坏判据及其剪切强度形式,并通过确定岩基潜在破坏面上的正应力,计算出岩体自重和岩体瞬时内摩擦角。对基于Hoek-Brown岩石经验破坏判据的岩基承载力的极限解法进行修正,得出剪切破坏模式下含有岩体自重和瞬时内摩擦角的Hoek-Brown岩基承载力修正公式。最后,通过算例证明修正公式的完善性和实用性。
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| 关 键 词： | 岩基承载力 Hoek-Brown岩石经验破坏判据 瞬时内摩擦角 剪切破坏 |
| 文章编号： | 1000-7598-(2005)04-0664-03 |
| 收稿时间： | 2003-12-19 |
| 修稿时间： | 2003年12月19 |
Modification of formula estimating ultimate bearing capacity of rock foundation based on Hoek-Brown strength criterion |
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| LI Pei-yong,YANG Qing,LUAN Mao-tian.Modification of formula estimating ultimate bearing capacity of rock foundation based on Hoek-Brown strength criterion[J].Rock and Soil Mechanics,2005,26(4):664-666. |
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| Authors: | LI Pei-yong YANG Qing LUAN Mao-tian |
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| Institution: | School of Civil and Hydraulic Engineering, and State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China |
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| Abstract: | To estimate the ultimate bearing capacity of the rock foundation is very important for the safety of the structure engineering. The purpose of this paper is to research the formula based on Hoek-Brown strength criterion, which estimates the ultimate bearing capacity of rock foundation under shear failure model. After estimating normal stress on the potential failure plane, instantaneous internal friction angle and deadweight of rock masses were calculated. On the basis of Hoek-Brown strength criterion and limiting equilibrium method, the formula was derived again. A modified formula is put forward, including the deadweight and instantaneous internal friction angle. Finally, the modified formula is verified by an engineering example. The results show that the modified formula is more reliable. |
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| Keywords: | Hoek-Brown strength criterion instantaneous internal friction angle ultimate bearing capacity of rock foundation shear failure |
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