|
|||||
|
|
| 大理岩常规三轴压缩下强度和变形特性的试验研究 | |
| 引用本文： | 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].岩土力学,2005,26(3):475-478. |
| 作者姓名： | 杨圣奇 苏承东 徐卫亚 |
| 作者单位： | 1. 河南理工大学,资源与材料工程系,河南,焦作,454159;河海大学,岩土工程研究所,江苏,南京,210098 2. 河南理工大学,资源与材料工程系,河南,焦作,454159 3. 河海大学,岩土工程研究所,江苏,南京,210098 |
| 基金项目： | 河南省创新人才资金资助项目。 |
| 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 |
| 文章编号： | 1000-7598-(2005)03-0475-04 |
| 收稿时间： | 2003-06-27 |
| 修稿时间： | 2003年6月27日 |
Experimental investigation on strength and deformation properties of marble under conventional triaxial compression |
|
| YANG Sheng-qi,SU Cheng-dong,XU Wei-ya.Experimental investigation on strength and deformation properties of marble under conventional triaxial compression[J].Rock and Soil Mechanics,2005,26(3):475-478. | |
| Authors: | YANG Sheng-qi SU Cheng-dong XU Wei-ya |
| Institution: | 1. Department of Resources & Material Engineering, Henan Polytechnic University, Jiaozuo 454159, China; 2. Research Institute of Geotechnical Engineering, Hohai University, Nanjing 210098, China |
| 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. |
| Keywords: | rock mechanics marble strength deformation experimental investigation |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |
| 点击此处可从《岩土力学》浏览原始摘要信息 | |
| 点击此处可从《岩土力学》下载免费的PDF全文 | |