玻璃砂透明土变形特性三轴试验研究

孔纲强; 刘璐; 刘汉龙; 周航

玻璃砂透明土变形特性三轴试验研究 English Version

孔纲强^{1, 2},
刘璐^{1, 2},
刘汉龙^{1, 2},
周航^{1, 2}

1. 河海大学岩土力学与堤坝工程教育部重点实验室，江苏南京 210098; 2. 河海大学土木与交通学院，江苏南京 210098

基金项目: 国家自然科学基金项目（51008116，51278170）；国家自然科学基金高铁联合基金项目（U1134207）

详细信息

作者简介:
孔纲强(1982- )，男，浙江磐安人，博士，副教授，主要从事软土地基处理及桩-土相互作用方面的教学与研究工作。E-mail: gqkong1@163.com。

中图分类号: TU411
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出版历程
- 收稿日期: 2012-09-12
- 发布日期: 2013-06-19

Triaxial tests on deformation characteristics of transparent glass sand

KONG Gang-qiang^{1, 2},
LIU Lu^{1, 2},
LIU Han-long^{1, 2},
ZHOU Hang^{1, 2}

1. Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China; 2. College of Civil and Transportation Engineering, Hohai University, Nanjing 210098, China

摘要

摘要: 玻璃砂透明土是一种由玻璃砂、正十二烷和15号白油按质量比1∶4的混合液体制备而成的新型人工合成透明土；该材料具有透明度高，与天然土体相似度更好等优点，可以用于基于透明土材料的可视化模型试验。为了研究其变形特性，对不同级配的玻璃砂透明土，进行三轴固结不排水剪切试验和三轴固结排水剪切试验，并与同等条件下的福建标准砂试验结果进行对比分析；测得固结不排水剪应力-应变曲线、以及孔压应变曲线形态等工程特性。试验结果表明，随着相对密度的增加，玻璃砂的应力-应变关系从应变硬化型向应变软化型过渡，破坏时的孔压系数A_f降低，变形模量变大；与标准砂相比，玻璃砂透明土的应力-应变曲线峰值来的相对更慢一些。
- 玻璃砂透明土 /
- 标准砂 /
- 变形特性 /
- 三轴试验
Abstract: Based on the transparent soil materials and digital imaging technology, the model tests on geotextile can be visualized. Transparent glass sand is one kind of new transparent synthetic soil materials, which is composed by glass sand, twelve alkane and white mineral oil mixture (1∶4). This new material has good transparency, and its properties are similar to those of natural soil. Hence, it can be used in visualization model test technique. Based on the consolidated undrained triaxial compression tests and consolidated drained triaxial compression tests, the deformation properties of the transparent glass sand with different size ranges are studied. For comparative analysis, the deformation properties of standard sand are also obtained. Then stress-strain curves and pore pressure-strain curves of the soil are measured. The laboratory test results show that the stress-strain relation is transited from strain hardening to strain softening, and the pore pressure coefficient and deformation modulus decrease with the increase of the relative density. The peak of the stress-strain curve of the transparent glass sand is relatively slower compared with that of the standard sand.
- transparent glass sand /
- standard sand /
- deformation property /
- triaxial test

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参考文献(12)

[1]	邵龙潭),(王助贫),(刘永禄). 三轴土样局部变形的数字图像测量方法[J]. (岩土工程学报), 2002,24(2):159-163. (SHAO Long-tan, WANG Zhu-pin, LIU Yong-lu. Digital image processing technique for measurement of the local deformation of soil specimen in triaxial test[J]. Chinese Journal of Geotechnical Engineering, 2002, 24(2): 159-163.( (in Chinese))
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玻璃砂透明土变形特性三轴试验研究 English Version

作者简介: 孔纲强(1982- )，男，浙江磐安人，博士，副教授，主要从事软土地基处理及桩-土相互作用方面的教学与研究工作。E-mail: gqkong1@163.com。

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Triaxial tests on deformation characteristics of transparent glass sand

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目录

作者简介:
孔纲强(1982- )，男，浙江磐安人，博士，副教授，主要从事软土地基处理及桩-土相互作用方面的教学与研究工作。E-mail: gqkong1@163.com。