| 人工制备结构性黄土的真三轴试验研究 |
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| 引用本文： | 陈昌禄,邵生俊,张喆.人工制备结构性黄土的真三轴试验研究[J].岩土力学,2013,34(8):2231-2238. |
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| 作者姓名： | 陈昌禄 邵生俊 张喆 |
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| 作者单位： | 1.山西省交通科学研究院 黄土地区公路建设与养护技术交通行业重点实验室，太原 030006； 2.毕节学院 建筑工程学院，贵州 毕节 551700；3.西安理工大学 岩土工程研究所，西安 710048 |
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| 基金项目： | 国家自然科学基金资助(No.41272320)；黄土地区公路建设与养护技术交通行业重点实验室开放课题资助(No. KLTLR-Y12-3)；贵州省教育厅优秀科技创新人才项目资助(黔教合 KY 字[2012]096)。 |
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| 摘 要： | 研制一种室内制备人工结构性黄土的方法，在改进原真三轴仪的不足的基础上进行人工制备结构性黄土的真三轴试验研究。结果表明，人工制备结构性黄土的方法合理可靠。同时，分析了结构性黄土在复杂应力条件下的破坏强度及残余强度变化规律，当固结围压小于结构性黄土的结构强度时，土的应力-应变曲线为软化型，反之则为硬化型；Mohr-Coulomb强度准则在描述结构性充分发挥后的残余强度时变化规律较好，在描述峰值破坏强度时则明显偏小，存在较大误差。
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| 关 键 词： | 结构性黄土 人工制备 真三轴试验 强度规律 |
| 收稿时间： | 2012-05-29 |
Study of artificial structural loess under true triaxial tests |
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| CHEN Chang-lu
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SHAO Sheng-jun
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ZHANG Zhe.Study of artificial structural loess under true triaxial tests[J].Rock and Soil Mechanics,2013,34(8):2231-2238. |
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| Authors: | CHEN Chang-lu SHAO Sheng-jun ZHANG Zhe |
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| Institution: | 1. Key Laboratory of Highway Construction and Maintenance Technology in Loess Region, Ministry of Transport, Shanxi Provincial Research Institute of Communication, Taiyuan 030003, China, 2. Architecture and Civil Engineering, Bijie University, Bijie, Guizhou 551700, China; 3. Institute of Geotechnical Engineering, Xi’an University of Technology, Xi’an 710048, China |
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| Abstract: | Structural characteristic is an important basic property of natural loess. The authors have developed an artificial preparation of structural loess, improved the deficiencies of the original true triaxial apparatus and carried out the true triaxial tests of artificial structural loess. The results show that the method of artificial structural loess is reasonably reliable. At the same time, the variation of failure strength and residual strength of structural loess under complex stress conditions is analyzed. When the confining pressure is less than the structural strength of the structural loess soil, the stress-strain curves is softening, and on the contrary hardening. Mohr-Coulomb strength criterion is better to describe the residual strength variation of structural loess and significantly worse to describe the peak breaking strength variation of structural loess. |
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| Keywords: | structural loess artificial preparation true triaxial test strength variation |
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