| 三轴压缩条件下基于CT实时监测的冻结兰州黄土细观损伤变化研究 |
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| 引用本文： | 郑剑锋,马巍,赵淑萍,蒲毅彬.三轴压缩条件下基于CT实时监测的冻结兰州黄土细观损伤变化研究[J].冰川冻土,2011,33(4):839-845. |
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| 作者姓名： | 郑剑锋 马巍 赵淑萍 蒲毅彬 |
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| 作者单位： | 中国科学院寒区旱区环境与工程研究所冻土工程国家重点实验室,甘肃兰州,730000 |
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| 基金项目： | 中国科学院西部行动计划(二期)项目(KZCX2-XB2-10); 国家自然科学基金项目(410011041;40971046;41071048),国家自然科学基金创新群体项目(40821001); 冻土工程国家重点实验室自主项目(SKLFSE-ZQ-09)资助 |
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| 摘 要： | 在IMPa围压下，对不同温度条件下的冻结兰州黄土三轴压缩试验过程进行CT动态扫描，获得了由CT数表示的土体损伤量表达式．结果表明：冻结兰州黄土最初在围压作用下，试样沿径向方向被压缩，导致试样轴向伸长；低温冻结试样的弹性变形持续时间长于高温试样，如-2．3℃试样在应变达到0．32％时即开始屈服进入塑性变形，而-7℃试样的...
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| 关 键 词： | 冻结兰州黄土 三轴压缩 CT实时动态监测 损伤变量 |
Study of Meso-Damage Changes of Frozen Lanzhou Loess under Triaxial Compression Based on CT Real-Time Monitoring |
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| ZHENG Jian-feng,MA Wei,ZHAO Shu-ping,PU Yi-bin.Study of Meso-Damage Changes of Frozen Lanzhou Loess under Triaxial Compression Based on CT Real-Time Monitoring[J].Journal of Glaciology and Geocryology,2011,33(4):839-845. |
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| Authors: | ZHENG Jian-feng MA Wei ZHAO Shu-ping PU Yi-bin |
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| Institution: | ZHENG Jian-feng,MA Wei,ZHAO Shu-ping,PU Yi-bin(State Key Laboratory of Frozen Soil Engineering,Cold and Arid Regions Environmental and Engimneering Research Institute,Chinese Academy of Sciences,Lanzhou Gansu 730000,China) |
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| Abstract: | Under 1MPa confining pressure,a series of CT scanning tests were performed on frozen Lanzhou loess with different temperatures under triaxial loading condition.The soil damage variable expressed by CT number was obtained and the following conclusions can be drawn.At the beginning of loading confining pressure,the specimen is compressed along the radial direction,leading to axial elongation of the specimen;the duration of elastic deformation of the specimen at low temperature is more longer than that at high... |
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| Keywords: | Frozen Lanzhou Loess triaxial compression CT real-time monitoring damage variable |
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