大理岩常规三轴压缩下强度和变形特性的试验研究

›› 2005, Vol. 26 ›› Issue (3): 475-478.

大理岩常规三轴压缩下强度和变形特性的试验研究

杨圣奇^{1, 2}，苏承东¹，徐卫亚²

1. 河南理工大学资源与材料工程系，河南焦作 454159；2. 河海大学岩土工程研究所，江苏南京 210098

收稿日期:2003-06-27 出版日期:2005-03-10 发布日期:2013-11-21
作者简介:杨圣奇，男，1978年生，博士生，主要从事岩石力学基本理论与工程应用方面的研究
基金资助:
河南省创新人才资金资助项目。

Experimental investigation on strength and deformation properties of marble under conventional triaxial compression

YANG Sheng-qi^{1, 2}, SU Cheng-dong¹ , XU Wei-ya²

1. Department of Resources & Material Engineering, Henan Polytechnic University, Jiaozuo 454159, China; 2. Research Institute of Geotechnical Engineering, Hohai University, Nanjing 210098, China

Received:2003-06-27 Online:2005-03-10 Published:2013-11-21

摘要/Abstract

摘要： 通过在伺服试验机上对中、粗颗粒大理岩进行常规三轴试验，基于试验结果，研究了两种颗粒大理岩的强度和变形特性。结果表明，低围压时岩样内部材料并未均匀化，岩石表现为应变软化特性；而高围压时岩样内部材料强度由低到高逐渐屈服，变形趋于均匀，岩石出现塑性流动特性。岩石的峰值应变与围压显著成正线性关系；中颗粒和粗颗粒岩样之间确实存在差异，但内摩擦系数可以表征材料力学性质，与粒径没有关系；岩石残余强度对围压的敏感性显著高于峰值强度。

关键词: 岩石力学, 大理岩, 强度, 变形, 试验研究

Abstract: Experiments were carried out to investigate the marble specimens with medium and coarse grains under conventional triaxial compression by the RMT-150B servo-controlling testing machine. Based on the experimental results, the strength and deformation properties of marble specimens with medium and coarse grains under conventional triaxial compression were studied. The results show that marble will manifest the property of strain softening when the material in the rock does not tend to uniform under the lower confining pressure. However, marble will show the property of plastic flowage when the material deformation becomes uniform under the higher confining pressure. The peak strain of rock material has a positive linear relation with the confining pressure. Although marble specimens with medium grains are different from that with coarse grains, the internal friction coefficient can show the mechanical property of material, and has no distinct relation with the grain size. The sensitivity of residual strength on the confining pressure is higher than that of peak strength.

Key words: rock mechanics, marble, strength, deformation, experimental investigation

中图分类号:

TD313

杨圣奇，苏承东，徐卫亚,. 大理岩常规三轴压缩下强度和变形特性的试验研究[J]. , 2005, 26(3): 475-478.

YANG Sheng-qi , SU Cheng-dong , XU Wei-ya . Experimental investigation on strength and deformation properties of marble under conventional triaxial compression[J]. , 2005, 26(3): 475-478.

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