| 水泥土各向异性变形特性研究 |
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| 引用本文： | 宋新江,徐海波,王永雷,王伟,周爱兆.水泥土各向异性变形特性研究[J].岩土力学,2012,33(6):1619-1624. |
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| 作者姓名： | 宋新江 徐海波 王永雷 王伟 周爱兆 |
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| 作者单位： | 1. 安徽省水利部淮委水利科学研究院，安徽 蚌埠 233000；2. 水利部淮河水利委员会，安徽 蚌埠 233000； 3. 绍兴文理学院 土木工程系，浙江 绍兴 312000；4. 江苏科技大学 土木工程与建筑学院，江苏 镇江 212003 |
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| 基金项目： | 水利部公益性行业科研专项(No.201101012);教育部科学技术研究重点项目(No.211068) |
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| 摘 要： | 采用研制的真三轴仪进行水泥土单向加荷试验，研究水泥土的各向异性变化规律，探讨应力对侧向膨胀的影响。结果表明，单向加荷条件下，加荷方向均产生压缩，而侧向膨胀主要与剪应力增量 有关；大主应力 单向加荷， ，中主应力 、小主应力 方向产生侧向膨胀；中主应力单向加荷， 时， 方向产生侧向膨胀， 时，无侧向膨胀；小主应力单向加荷， ，试样不产生侧向膨胀；对于相同应力增量，试样侧向膨胀和压缩应变均随初始固结应力的增大而减小。能量分析表明，试样的侧向膨胀与某一方向的约束程度相关，约束越强，侧向膨胀量越小；约束越弱，侧向膨胀量越大。
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| 关 键 词： | 水泥土 单向加荷 各向异性 真三轴仪 变形 |
| 收稿时间： | 2011-12-23 |
Study of characteristics of cement-soil anisotropic deformation |
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| SONG Xin-jiang
,
XU Hai-bo
,
WANG Yong-lei
,
WANG Wei
,
ZHOU Ai-zhao.Study of characteristics of cement-soil anisotropic deformation[J].Rock and Soil Mechanics,2012,33(6):1619-1624. |
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| Authors: | SONG Xin-jiang XU Hai-bo WANG Yong-lei WANG Wei ZHOU Ai-zhao |
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| Institution: | 1. Water Resources Research Institute of Anhui Province and Huaihe Water Resources Committee, Ministry of Water Resources, Bengbu, Anhui 233000, China; 2. Huaihe River Commission Ministry of Water Resources, Bengbu, Anhui 233000, China; 3. Department of Civil Engineering, Shaoxing University, Shaoxing, Zhejiang 312000, China; 4. College of Civil Engineering and Architecture, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu 212003, China |
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| Abstract: | The uniaxial loading tests on cement-soil are conducted by true triaxial apparatus in order to study the characteristics of cement-soil anisotropic deformation and the effect of stress on the lateral expansions.It is shown that the specimen is compressed along with the loading direction and the lateral expansions are related to the shear stress increment under uniaxial loading condition.Under the loading condition in the direction of maximum principal stress,the value of the shear stress increment is greater than zero,and the lateral expansions in two directions of intermediate principal stress and minor principal stress are shown;under the loading condition in the direction of intermediate principal stress,the lateral expansions in the directions of minor principal stress are shown when the value of the shear stress increment is greater than zero only;under the loading condition in the direction of minor principal stress,lateral expansions are not produced due to the value of the shear stress increment is less than zero;both the lateral expansions and compressive strain decrease with the increasing of consolidation stress for the same stress increment.It can be seen that the lateral expansions have a negative correlation with the constraining force at a certain direction according to the energy analysis. |
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| Keywords: | cement-soil uniaxial loading anisotropy true triaxial apparatus deformation |
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