| 三种红层岩石常规三轴压缩下的强度与变形特性研究 |
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| 引用本文： | 周应华,周德培,封志军.三种红层岩石常规三轴压缩下的强度与变形特性研究[J].力学学报,2005,13(4):477-480. |
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| 作者姓名： | 周应华 周德培 封志军 |
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| 作者单位： | 西南交通大学土木工程学院,成都610031 |
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| 基金项目： | 交通部西部交通建设科技项目“红层软岩地区公路修建技术研究”(合同号:2002-318-000-26) |
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| 摘 要： | 利用MTS815Teststar程控伺服岩石力学试验系统研究了川东地区一红层边坡中的砂岩、粉砂岩和泥岩围压为03MPa的应力-应变全过程曲线,建立了峰值强度、峰值强度前弹性模量以及峰值强度后的弹性模量和围压的关系。将低围压下红层的全应力-应变曲线概化成5个阶段,分别为压密段、弹性段、屈服段、应变软化段和塑性流动阶段。试验结果得出,红层弹性模量随围压的增加而提高且变化明显,砂岩和粉砂岩在此围压内为脆性破坏,泥岩为塑性破坏的规律。
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| 关 键 词： | 红层 三轴试验 峰值强度 弹性模量 全过程曲线 |
| 收稿时间： | 2004-10-29 |
| 修稿时间： | 2004-11-22 |
STRENGTH AND DEFORMATION OF THREE TYPES OF RED BEDS UNDER CONVENTIONAL TRIAXIAL COMPRESSION |
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| ZHOU Yinghua,ZHOU Depei,FENG Zhijun.STRENGTH AND DEFORMATION OF THREE TYPES OF RED BEDS UNDER CONVENTIONAL TRIAXIAL COMPRESSION[J].chinese journal of theoretical and applied mechanics,2005,13(4):477-480. |
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| Authors: | ZHOU Yinghua ZHOU Depei FENG Zhijun |
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| Institution: | School of Civil Engineering,Southwest Jiaotong University,Chengdu610031 |
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| Abstract: | Complete stress-strain curves for sandstone,siltstone and mudstone in a red bed slope from east Sichuan province are obtained were obtained under confining pressures from 0 to 3 MPa using MTS815 Teststar,a rock mechanics servo system.The results showed that peak strength,yield strength and relaxation modulus vary with the confining pressure.The complete stress-strain curves can be divided into five phases: compacting,elastic,yield,strain softening and plastic flow.Elasticity modulus of the red bed increases rapidly with the confining pressure.Brittle failure is observed in sandstone and siltstone,while plastic failure is observed in mudstone. |
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| Keywords: | Red beds Triaxial testing Peak strength Elasticity modulus Complete curves |
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