水泥土各向异性变形特性研究

›› 2012, Vol. 33 ›› Issue (6): 1619-1624.

水泥土各向异性变形特性研究

宋新江¹，徐海波¹，王永雷²，王伟³，周爱兆⁴

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

收稿日期:2011-12-23 出版日期:2012-06-11 发布日期:2012-06-14
作者简介:宋新江，男，1970年生，博士，高级工程师，主要从事岩土工程和水泥土渗透与力学特性的研究工作
基金资助:
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)

Study of characteristics of cement-soil anisotropic deformation

SONG Xin-jiang¹，XU Hai-bo¹，WANG Yong-lei²，WANG Wei³，ZHOU Ai-zhao⁴

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

Received:2011-12-23 Online:2012-06-11 Published:2012-06-14

摘要/Abstract

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。

关键词: 水泥土, 单向加荷, 各向异性, 真三轴仪, 变形

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.

Key words: cement-soil, uniaxial loading, anisotropy, true triaxial apparatus, deformation

中图分类号:

TU 47

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]. , 2012, 33(6): 1619-1624.

SONG Xin-jiang ，XU Hai-bo ，WANG Yong-lei ，WANG Wei ，ZHOU Ai-zhao . Study of characteristics of cement-soil anisotropic deformation[J]. , 2012, 33(6): 1619-1624.

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