| 原位冻结黏土单轴压缩试验研究 |
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| 引用本文： | 刘增利,张小鹏,李洪升.原位冻结黏土单轴压缩试验研究[J].岩土力学,2007,28(12):2657-2660. |
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| 作者姓名： | 刘增利 张小鹏 李洪升 |
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| 作者单位： | 1. 大连理工大学,工程力学系,工业装备结构分析实验室,大连,116023;中国科学院兰州寒区旱区环境与工程研究所,冻土工程国家重点实验室,兰州,730000
2. 大连理工大学,工程力学系,工业装备结构分析实验室,大连,116023 |
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| 摘 要： | 采用沈阳原位冻结黏土制备了冻土单轴压缩试样,进行了冻结黏土的单轴压缩试验,获得了冻结黏土单轴压缩载荷-位移关系曲线,并对原位冻结黏土的破坏特征进行了研究。试验表明,原位冻结黏土在给定温度(-15℃)和加载速率范围(2.5×10-2～1.0×10-5 mm/s)下,开始均具有一定的线弹性压缩过程,随后产生微裂纹,而冻土也进入塑性硬化阶段,随着裂纹的扩展与贯通,最终达到剪切破坏。原位冻土的破坏形型表明,由于其固有的结构性,使之与重塑土的单轴压缩破坏特征具有明显的不同。
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| 关 键 词： | 原位冻结黏土 单轴压缩 破坏特征 |
| 文章编号： | 1000-7598-（2007）12-2657-04 |
| 收稿时间： | 2005-12-01 |
| 修稿时间： | 2006-05-09 |
Experimental study of uniaxial compression of clay frozen in situ |
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| LIU Zeng-li,ZHANG Xiao-peng,LI Hong-sheng.Experimental study of uniaxial compression of clay frozen in situ[J].Rock and Soil Mechanics,2007,28(12):2657-2660. |
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| Authors: | LIU Zeng-li ZHANG Xiao-peng LI Hong-sheng |
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| Institution: | 1. Department of Engineering Mechanics, Dalian University of Technology, Dalian, 116023,China; 2. State Key Labortary of Frozen Soil Engineering, LIGG, Chinese Academy of Sciences, Lanzhou 730000, China |
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| Abstract: | Uniaxial compression tests for frozen clay were accomplished in test machine with environmental control equipment, which the samples were taken from outside after the clay frozen. Relationship between load and deformation was achieved, compression strength and accordingly deformation were given out, and failure features were observed. The tests show that under the specified test temperature -15 ℃and loading rates range of .5×10-2-1.0×10-5 mm/s; the frozen clay samples have the same features: elastical characteristics shown in first, then some micro cracks born and with the development of micro cracks, macro cracks developed; and samples get to failure at the end. The features shown in our tests are different from that of the remoulded frozen clay. |
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| Keywords: | clay frozen in situ uniaxial compression failure features |
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