| 上海粉质粘土的三轴CT实时细观试验 |
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| 引用本文： | 孙红,葛修润,牛富俊,蒲毅彬,马巍. 上海粉质粘土的三轴CT实时细观试验[J]. 岩石力学与工程学报, 2005, 24(24): 4559-4564 |
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| 作者姓名： | 孙红 葛修润 牛富俊 蒲毅彬 马巍 |
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| 作者单位： | 1. 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;上海交通大学,船舶海洋与建筑学院,上海,200030
2. 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： | 中国科学院资助项目，国家重点实验室基金 |
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| 摘 要： | 采用CT实时试验对上海粘性土的三轴应力条件下的特性进行系统的试验研究.研究表明,上海灰色粉质粘土在三轴应力下细观变形基本上分为4个阶段,即微裂纹压密阶段,初期损伤阶段,损伤快速发展阶段和软化破坏阶段.粉质粘土初始状态为不均一的和初始损伤,受力过程中以局部变形为主,灰色粉质粘土的破坏是由于产生局部变形,形成剪切带造成的,裂纹在峰值强度及峰值强度后完全形成的.
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| 关 键 词： | 土力学 结构性土 CT试验 损伤 局部变形 细观试验 |
| 文章编号： | 1000-6915（2005）24-4559-06 |
| 收稿时间： | 2004-07-06 |
| 修稿时间： | 2004-07-062004-10-08 |
REAL-TIME CT MESO-TESTING ON SHANGHAI SILTY CLAY SUBJECTED TO TRIAXIAL LOADING |
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| SUN Hong,GE Xiu-run,NIU Fu-jun,PU Yi-bin,MA Wei. REAL-TIME CT MESO-TESTING ON SHANGHAI SILTY CLAY SUBJECTED TO TRIAXIAL LOADING[J]. Chinese Journal of Rock Mechanics and Engineering, 2005, 24(24): 4559-4564 |
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| Authors: | SUN Hong GE Xiu-run NIU Fu-jun PU Yi-bin MA Wei |
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| Affiliation: | 1. State Key Laboratory of Frozen Soil Engineering, Cold and Arid Region Environmental and Engineering Research lnstitute, Chinese Academy of Sciences, Lanzhou 730000, China; 2. School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiaotong University, Shanghai 200030, China |
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| Abstract: | Studies on silty clay subjected to triaxial loading by using real-time computed tomography(CT) scanning experiment are carried out.Based on the CT-number and CT images,it is shown that the stress-strain curve of soil can be divided into four stages?micro-defects closing stage,initial damage stage,rapid damage development stage,and softening failure stage.Silty clay is a typically nonuniform and original damaged material.During loading process,local deformation is formed;and the failure of soil is caused by local deformation and formation of shear band.Macro-fissure will be completely generated at the peak and post-peak of strength. |
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| Keywords: | soil mechanics structured soil computed tomography(CT) test damage local deformation meso-testing |
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