| 黏土蠕变量的试验研究 |
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| 引用本文： | 李建中,倪曦,陈灿.黏土蠕变量的试验研究[J].工业建筑,2011,41(1):82-85. |
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| 作者姓名： | 李建中 倪曦 陈灿 |
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| 作者单位： | 1. 中南大学地学与环境工程学院,长沙,410083
2. 成都理工大学地球科学学院,成都,610059 |
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| 基金项目： | 国家自然科学基金项目(50979117);中南大学研究生学位论文创新基金项目(2010ssxt042) |
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| 摘 要： | 对黏土的原状和重塑土样在三轴排水剪切试验条件下的蠕变性进行研究,试验方法包括改变加载应变率的单向加载试验、单向加载试验过程中的蠕变试验、卸载和重复加载过程的蠕变试验等。试验结果表明:1)黏土蠕变量大小与黏土试样的状态有关;2)黏土蠕变量大小与蠕变之前的应变率有关,蠕变前应变率越大,蠕变量就越大;3)黏土蠕变量大小与蠕变时所处的应力水平有关,所处的应力水平越高,蠕变量就越大;4)在重复加载过程中,随着应力水平的提高,黏土的蠕变表现出由负蠕变、中性蠕变到正蠕变的逐渐转化。
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| 关 键 词： | 黏土 蠕变量 加载速率 |
EXPERIMENTAL RESEARCH ON THE AMOUNT OF CLAY CREEP |
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| Li Jianzhong
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Ni Xi
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Chen Can.EXPERIMENTAL RESEARCH ON THE AMOUNT OF CLAY CREEP[J].Industrial Construction,2011,41(1):82-85. |
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| Authors: | Li Jianzhong Ni Xi Chen Can |
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| Affiliation: | 1.School of Geoscience and Environmental Engineering,Central South University,Changsha 410083,China;2.School of Earth Sciences,Chengdu University of Technology,Chengdu 610059,China) |
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| Abstract: | Creep deformation of undisturbed and reconstituted clay was studied based on drained triaxial compression tests.Creep tests were performed several times during monotonic primary loading,unloading and reloading.Test results show:1) the creep deformation of clay is related to the type of clay;2) the deformation of clay creep is related to strain rate is before creep,the larger strain rate,the greater the amount of creep;3) the deformation of clay creep is related to the stress level,as creep stress maintaining higher,the amount of clay creep is larger;and 4) in reloading progress,as stress level increases,the creep of clay show the negative creep,neutral creep to positive creep gradually being transformed. |
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| Keywords: | clay the amount of creep loading rate |
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