[1]张 磊,刘 慧,王铁行.不同初始干密度黄土与混凝土接触面直剪试验[J].西安建筑科技大学学报(自然科学版),2020,52(03):384-389.[doi:10.15986/j.1006-7930.2020.03.011]
　ZHANG Lei,LIU Hui,WANG Tiehang.Direct shear test on interface between loess with different initial dry densities and concrete[J].J. Xi’an Univ. of Arch. & Tech.(Natural Science Edition),2020,52(03):384-389.[doi:10.15986/j.1006-7930.2020.03.011]
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不同初始干密度黄土与混凝土接触面直剪试验()
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西安建筑科技大学学报（自然科学版）[ISSN:1006-7930/CN:61-1295/TU]

卷:
52
期数:
2020年03期
页码:
384-389
栏目:
出版日期:
2020-06-30

文章信息/Info

Title:
Direct shear test on interface between loess with different initial dry densities and concrete
文章编号:
1006-7930(2020)03-0384-06
作者:
张 磊1; 2;  刘 慧3; 4;  王铁行1; 2
(1.西安建筑科技大学 土木工程学院,陕西 西安 710055; 2.陕西省岩土与地下空间工程重点实验室,陕西 西安 710055; 3.贵州正业工程技术投资有限公司,贵州 贵阳 550012; 4.贵州省岩溶地基工程技术研究中心,贵州 贵阳 550012)
Author(s):
ZHANG Lei1; 2;  LIU Hui3; 4;  WANG Tiehang1; 2
(1.School of Civil Engineering, Xi’an Univ.of Arch.& Tech., Xi’an 710055, China; 2.Shaanxi Key Laboratory of Geotechnical and Underground Space Engineering, Xi’an 710055, China; 3.Guizhou Zhengye Engineering and Investment Incorporation Co. Ltd., Guiyang 550012, China; 4.Guizhou Karst Foundation Engineering Technology Research Center, Guiyang 550012, China)
关键词:
黄土;  接触面;  大型直剪试验;  初始干密度;  抗剪强度
Keywords:
loess;  interface;  large-scale direct shear tests;  initial dry density;  shear strength
分类号:
TU 411.3
DOI:
10.15986/j.1006-7930.2020.03.011
文献标志码:
A
摘要:
为提高黄土填方地区基础承载力和沉降计算分析水平,采用大型直剪仪开展了不同初始干密度的重塑黄土与混凝土接触面剪切试验.试验结果表明,随着法向应力的增加,不同土样初始干密度下接触面剪应力-剪切位移曲线由弱软化型逐渐过渡为弱硬化型,最后转变为强硬化型.随着土样初始干密度的增加,接触面剪应力-剪切位移曲线的初始斜率增大,抗剪强度增大,粘聚力先增大再减小,内摩擦角持续增大.土样初始干密度对接触面抗剪强度的影响随法向应力的增加而增大.随着土样初始干密度的减小或法向应力的增加,体应变增大,黄土与混凝土接触面由剪胀逐渐转化为剪缩.
Abstract:
In order to improve the level of calculation and analysis of bearing capacity and settlement of the foundation in loess filling area, shear tests on loess-concrete interface, under various initial dry densities, were performed using a large direct shear apparatus.Test results show that with the increase of the normal stress, the shear stress-shear displacement curve of interface becomes from weak soften form to weak hardening from, and then to strong hardening form.With the increase of the initial dry density of loess, the initial slope of the shear stress-shear displacement curve of interface increases, the shear strength increases, the cohesive force of interface firstly increases and then decreases, while the internal friction angle increases continuously.The influence of the initial dry density of loess on the shear strength of interface becomes more obvious when the normal stress increases.With the decrease of the initial dry density of loess or the increase of the normal stress, the volume strain of interface decreases, and the volume changing rule changes from dilatancy to shrinkage.

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备注/Memo

备注/Memo:
收稿日期:2019-09-17 修改稿日期:2020-05-13
基金项目:国家自然科学基金项目(51508455); 陕西省自然科学基础研究计划项目(2019JM-232); 西安建筑科技大学青年科技基金项目(QN1614)
第一作者:张磊(1981-),男,博士,讲师,主要研究土与结构物相互作用.E-mail: zh888lei@163.com
更新日期/Last Update: 2020-07-30