| 一种常见的岩体结构——板裂结构及其力学模型 |
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| 引用本文： | 孙广忠,张文彬.一种常见的岩体结构——板裂结构及其力学模型[J].地质科学,1985,0(3):275-282. |
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| 作者姓名： | 孙广忠 张文彬 |
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| 作者单位： | 中国科学院地质研究所 |
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| 摘 要： | 岩体结构观念的提出对岩体工程地质和岩体力学的研究具有重要意义。岩体结构类型划分方案已经提出了许多,已有的岩体结构划分原则主要是岩体破碎程度。谷德振、孙玉科等曾提出过岩体结构基本单元是:结构面和结构体。1977年底谷德振教授曾提出过,碎碎带应作为一种岩体结构单元问题,没有引起人们的重视。
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| 关 键 词： | , |
| 收稿时间： | 1983-09-21 |
| 修稿时间： | 1983-09-21; |
A COMMONLY-SIGHTED ROCK MASS STRUCTURE——SLAB-RENT STRUCTURE AND ITS MECHANICAL MODEL |
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| Sun Guangzhong,Zhang Wenbin.A COMMONLY-SIGHTED ROCK MASS STRUCTURE——SLAB-RENT STRUCTURE AND ITS MECHANICAL MODEL[J].Chinese Journal of Geology,1985,0(3):275-282. |
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| Authors: | Sun Guangzhong Zhang Wenbin |
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| Institution: | Institute of Geology, Academia Sinica, Beijing |
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| Abstract: | There are interlayer dislocations universally between soft and hard layer of the bedded rock mass under the tectonic action. The mechanical strength of the interlayer shear zone is extremely low. The harder layer has been divided into slab-rent structure bodies interlayer dislocation and the structure of this kind of rock mass is considering as a special structure of rock mass. This kind of structure of rock mass was defined as a slab-rent structure by authors.Establishment of concept of slab-rent structure has an important theoretical and practical significance. It has become a new page for improvement of rock mass mechanics theory. The rock mass with slab-rent structures is quite easy to be seen in nature, its deformation and failure pattern do not conform to a general law of deformation and failure of common material. And its mechanical action follows mechanical law of structure deformation and loss-stability of beam-slab. The toppling deformation, buckling failure and flexing deformation and failure of beam-slab structure body are a typical mechanical model of rock mass with such structure. The theory and method of structure mechanics are a basic way to resolve this problem. Authors not only discussed the forming mechanism and mechanical model of rock mass with slab-rent structure in this paper, but also have given the buckling failure criterion Pcr=8π2EI-q sinαl3 / 2l2 on a slab-column with a elastic curve type: Y =α(1-cos 2πX/l).And when Pcr = 0, authors obtained a critical length of stable slope: lcr =34π2EI/qsinα where g is weight of slab of one meter long and a is slope angle or dip angle of stratum. |
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| Keywords: | , |
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