[1]李扬波,李如玥,石熊,等.花岗岩残积土抗剪强度与微观结构特征[J].华侨大学学报(自然科学版),2024,45(3):332-338.[doi:10.11830/ISSN.1000-5013.202311028]
　LI Yangbo,LI Ruyue,SHI Xiong,et al.Shear Strength and Microstructure Characteristics of Granite Residual Soil[J].Journal of Huaqiao University(Natural Science),2024,45(3):332-338.[doi:10.11830/ISSN.1000-5013.202311028]
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花岗岩残积土抗剪强度与微观结构特征()
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《华侨大学学报（自然科学版）》[ISSN:1000-5013/CN:35-1079/N]

卷:
第45卷
期数:
2024年第3期
页码:
332-338
栏目:
出版日期:
2024-05-15

文章信息/Info

Title:
Shear Strength and Microstructure Characteristics of Granite Residual Soil
文章编号:
1000-5013(2024)03-0332-07
作者:
李扬波1;  李如玥1;  石熊2;  陈怿旸3;  吴波1;  林炼伟1
1. 东华理工大学 土木与建筑工程学院, 江西 南昌 330013;2. 桂林电子科技大学 建筑与交通工程学院, 广西 桂林 541004;3. 江西省交通设计研究院有限责任公司, 江西 南昌 330052
Author(s):
LI Yangbo1;  LI Ruyue1;  SHI Xiong2;  CHEN Yiyang3; WU Bo1;  LIN Lianwei1
1. School of Civil and Architectural Engineering, East China University of Technology, Nanchang 330013, China; 2. School of Architecture and Transportation Engineering, Guilin University of Elctronic Technology, Guilin 541004, China; 3. Jiangxi Communications Design and Research Institute Limited Company, Nanchang 330052, China
关键词:
花岗岩残积土;  抗剪强度;  微观结构;  水的质量分数(含水率);  压实度
Keywords:
granite residual soil;  shear strength;  microstructure;  water mass fraction(water content);  compaction degree
分类号:
TU411.7
DOI:
10.11830/ISSN.1000-5013.202311028
文献标志码:
A
摘要:
对不同水的质量分数(含水率)及不同压实度的花岗岩残积土试样开展三轴试验和电镜扫描试验,探究土样的抗剪强度特性与微观孔隙结构之间的关系,从微观角度揭示花岗岩残积土的抗剪强度衰减机理。试验结果表明:花岗岩残积土试样的应力-应变曲线呈现应变硬化特征,抗剪强度随着含水率的升高而降低,随着压实度的增加而增加,且在围压应力较低时,花岗岩残积土试样对含水率及压实度的敏感性更强;从微观角度,花岗岩残积土试样的中孔隙和大孔隙的占比随着含水率的升高而增加,随着压实度的增加而减少。
Abstract:
The triaxial test and electron microscopy scanning test are conducted on the granite residual soil sample with different water mass fractions(water content)and different compaction degrees. The relationship between the shear strength characteristic and the microscopic pore structure of the soil samples are explored, and the shear strength attenuation mechanism of the granite residual soil is revealed from microscopic view. The experiment results show that the stress-strain curves of the granite residual soil sample have the strain hardening characteristic. The shear strength decreases with the increase of water content and increases with the increase of compaction degree. Under the low confining pressure stress, the granite residual soil samples are more sensitive to the water content and the compaction degree. From microscopic view, the proportion of mesopores and macropores in granite residual soil samples increases with increasing water content and decreases with increasing compaction degree.

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备注/Memo

备注/Memo:
收稿日期: 2023-11-02
通信作者: 李扬波(1986-),男,讲师,博士,主要从事岩土工程的研究。E-mail:258251182@qq.com。
基金项目: 国家自然科学基金资助项目(52278397, 52168055); 江西省教育厅科学技术资助项目(GJJ210705)
更新日期/Last Update: 2024-05-20