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低围压水平下QH-E模拟月壤三轴试验技术与力学特性

邹维列, 陈轮, 张俊峰, 刘小顺, 童朝霞

邹维列, 陈轮, 张俊峰, 刘小顺, 童朝霞. 低围压水平下QH-E模拟月壤三轴试验技术与力学特性[J]. 岩土工程学报, 2015, 37(8): 1418-1425. DOI: 10.11779/CJGE201508009
引用本文: 邹维列, 陈轮, 张俊峰, 刘小顺, 童朝霞. 低围压水平下QH-E模拟月壤三轴试验技术与力学特性[J]. 岩土工程学报, 2015, 37(8): 1418-1425. DOI: 10.11779/CJGE201508009
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ZOU Wei-lie, CHEN Lun, ZHANG Jun-feng, LIU Xiao-shun, TONG Zhao-xia. Techniques for triaxial compression tests on simulant lunar soil QH-E and its mechanical behaviors under low confining stress[J]. Chinese Journal of Geotechnical Engineering, 2015, 37(8): 1418-1425. DOI: 10.11779/CJGE201508009
Citation: ZOU Wei-lie, CHEN Lun, ZHANG Jun-feng, LIU Xiao-shun, TONG Zhao-xia. Techniques for triaxial compression tests on simulant lunar soil QH-E and its mechanical behaviors under low confining stress[J]. Chinese Journal of Geotechnical Engineering, 2015, 37(8): 1418-1425. DOI: 10.11779/CJGE201508009
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低围压水平下QH-E模拟月壤三轴试验技术与力学特性  English Version

  • 1. 武汉大学土木建筑工程学院,湖北 武汉 430072;
    2. 清华大学水沙科学与水利水电工程国家重点实验室,北京 100084;
    3. 武汉正华建筑设计有限公司,湖北 武汉 430072;
    4. 北京航空航天大学交通科学与工程学院,北京 100191

基金项目: 国家自然科学基金项目（51079075）
详细信息
    作者简介:

    邹维列（1969- ）,男,重庆丰都人,教授,博士生导师,主要从事非饱和土特性、土工合成材料应用、道路中的岩土工程问题等方面的教学和科研工作。E-mail: zwilliam@126.com。

  • 中图分类号: TU411

Techniques for triaxial compression tests on simulant lunar soil QH-E and its mechanical behaviors under low confining stress

  • 1. College of Civil Engineering, Wuhan University, Wuhan 430072, China;
    2. State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084, China;
    3. Wuhan Zhenghua Architectural Design Co., Ltd., Wuhan 430072, China;
    4. School of Transportation Science and Engineering, Beihang University, Beijing 100191, China

摘要

    摘要
  • 摘要: 月球的低重力环境对月面浅层月壤力学特性的影响很大。利用清华大学取自吉林省靖宇县境内的火山灰岩研制出的模拟月壤（QH-E）,对GCTS公司生产的STX型动/应力路径三轴仪重新配置高精度的传感器,并采取专门的试验技术,成功实施了一系列低围压水平（3.13~25 kPa）的三轴压缩试验。试验结果表明,在低围压水平下：模拟月壤具有显著的剪胀效应;与常规围压水平（50~150 kPa）结果相比,同一相对密度模拟月壤的峰值摩擦角更高;相对密度越高,峰值摩擦角越大;切线模量和剪切模量均随着围压和相对密度的减小而减小;剪胀角随围压的减小和相对密度的增大而增大,且低围压水平下剪胀角对围压变化十分敏感。最后就低围压下QH-E模拟月壤与饱和砂土特性的差异,及重力场环境和施加围压的介质的影响进行了讨论。
    Abstract: A series of typical triaxial compression tests are conducted on simulant lunar soil QH-E, which is originated from cinerite from Jingyu County, Jilin Province and is developed by Tsinghua University. For the triaxial compression tests on QH-E under low confining stress, highly sensitive transducers are used to measure the volume change in the water surrounding the triaxial test specimen and to control the confining stress. The test results indicate that the QH-E under low confining stresses (3.13~25 kPa) shows the conspicuous dilatancy behavior. Compared with the results from the conventional confining stresses (50~150 kPa), the peak friction angle of QH-E under low confining stresses is larger. The higher the relative density of QH-E, the larger the peak friction angle. Both the tangent modulus and the shear modulus of QH-E decrease with the decrease of the confining stress and relative density, while the dilatancy angle increases with the decrease of the confining stress and the increase of the relative density. Moreover, under low confining stresses the differences of the properties between the QH-E in this study and the saturated sands in the literatures, and the influences of both the moon/terrestrial environments and water in pressure chamber on the properties of QH-E, are discussed.
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出版历程
  • 收稿日期:  2014-10-10
  • 发布日期:  2015-08-24

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