海砂力学特性的黏粒效应和围压效应试验分析

王家全; 祝梦柯; 林志南; 唐滢

doi:10.13204/j.gyjzG21121703

海砂力学特性的黏粒效应和围压效应试验分析

doi: 10.13204/j.gyjzG21121703

王家全^1,2,3,
祝梦柯¹,
林志南^1,2, ,,
唐滢^1,2

1. 广西科技大学土木建筑工程学院, 广西柳州 545006;
2. 广西壮族自治区岩土灾变与生态治理工程研究中心, 广西柳州 545006;
3. 广西高校防灾减灾与预应力技术重点实验室, 广西柳州 545006

基金项目:

广西研究生教育创新计划项目(YCSW2021310)

广西高等学校高水平创新团队及卓越学者计划项目(桂教人才〔2020〕6号)

国家自然科学基金项目(41962017)

广西自然科学基金项目(2022GXNSFDA035081)

2020年广西高校中青年教师科研基础能力提升项目 (2020KY08023)。

详细信息

作者简介:
王家全,男,1981年出生,博士,教授,博士生导师,wjquan1999@163.com。

通讯作者:
林志南,男,1987年出生,博士,讲师,zhinan_lin@gxust.edu.cn。

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出版历程
- 收稿日期: 2021-12-17
- 网络出版日期: 2023-05-25
- 刊出日期: 2023-02-20

Experimental Analysis of Clay Effect and Confining Pressure Effect on Mechanical Properties of Sea Sand

WANG Jiaquan^1,2,3,
ZHU Mengke¹,
LIN Zhinan^{1,2
, ,},
TANG Ying^1,2

1. College of Civil and Architectural Engineering, Guangxi University of Science and Technology, Liuzhou 545006, China;
2. Guangxi Zhuang Autonomous Region Engineering Research Center of Geotechnical Disaster and Ecological Control, Liuzhou 545006, China;
3. Guangxi University Key Laboratory of Disaster Prevention and Mitigation and Prestress Technology, Liuzhou 545006, China

摘要

摘要: 利用GDS标准应力路径三轴试验系统,对钦州港海砂开展不同有效围压、黏粒含量下固结排水三轴剪切试验,分析有效围压、黏粒含量对钦州港海砂强度、变形特性的影响。结果表明:同一有效围压下,随着黏粒含量的增加,含黏粒海砂应力-应变曲线由应变软化型曲线向应变硬化型曲线过渡,峰值强度、应力相对软化系数及体积应变不断减小,而峰值应变增加。同一黏粒含量下,试样峰值强度随有效围压的增加逐渐增大,纯砂试样有效围压为300 kPa时的峰值强度相比于有效围压为100 kPa时提高了1.517倍,峰值强度与有效围压之间呈现良好的线性关系; 而应力相对软化系数、体积应变则随有效围压的增大而减小。最后,建立了黏粒含量在0%~20%的应力相对软化系数与有效围压、黏粒含量之间的联系。
- 海砂 /
- 黏粒含量 /
- 有效围压 /
- 力学特性
Abstract: Triaxially consolidated drained shear tests by the GDS standard stress path were conducted on the Qinzhou Port sea sand under the different effective confining pressures and clay content, which was be analyzed the effect of effective confining pressure and clay content on the strength and deformation characteristics of sea sand in Qinzhou Port. The results showed:under the same effective confining pressure, as the clay content increased, the stress-strain curves of clay-contained sea sand converted from a strain-softening curve to a strain-hardening curve. The peak strength, relative stress softening coefficient, and volumetric strain decreased steadily; the peak strain increased simultaneously. In the same clay content, the peak strength of the specimens increased gradually with the increase of the effective confining pressure. When the effective confining pressure for specimens of pure sand was 300 kPa, the peak strength of specimens was 1.517 times higher than that whose confining pressure was 100 kPa. There was a good linear relation between the effective confining pressure and the peak strength. Simultaneously, the relative softening coefficient of stress and volumetric strain decreased with the increase of the effective confining pressure. Finally, in the range of 0% to 20% of the clay content, and the relation between the relative stress softening coefficient and the effective confining pressure and clay content was established.
- sea sand /
- clay content /
- effective confining pressure /
- mechanical property

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参考文献(18)

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