Experimental study on sand shear wave velocity considering the influence of particle shape

被引：0
|
作者：
Liu X. [1 ,2 ]
Xu X. [1 ]
Huang L. [1 ]
Lan H. [1 ,2 ,3 ]
机构：
[1] School of Geological Engineering and Geomatics, Chang'an University, Shaanxi, Xi'an
[2] Key Laboratory of Ecological Geology and Disaster Prevention of Ministry of Natural Resources, Shaanxi, Xi'an
[3] State Key Laboratory of Resources and Environmental Information Systems, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing
来源：
Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering | 2024年 / 43卷 / 05期
基金：
中国国家自然科学基金;
关键词：
bender element; particle shape; quartz sand; shear wave velocity; soil mechanics; state parameter;
D O I：
10.13722/j.cnki.jrme.2023.0406
中图分类号：
学科分类号：
摘要：
The shapes of natural sands often vary greatly. To study the characteristics of shear wave propagation in sand with different shapes,quartz sands with three different shapes were first selected for particle shape analysis. Secondly,a triaxial apparatus equipped with a bender element system was used to conduct shear wave tests and triaxial shear tests on sand samples,obtaining the shear wave velocities and critical state lines of the three types of quartz sands. The test results indicate that:(1) under similar void ratios and confining pressures,the shear wave velocity(Vs) of the quartz sands gradually increases as the overall regularity(OR) decreases;(2) based on the state parameter in the framework of the critical state soil mechanics,a new model that allows unified characterization of shear wave velocity for quartz sand was developed,and it shows a satisfactory predictive performance by using the data from the literature;(3) on the basis of the above model,a new method using the shear wave velocity was proposed to predict the shear response of quartz sands with different shapes. The outcomes from this study provide a basis for evaluating the shear instability of complex-shaped sandy soil layers using the in-situ shear wave velocity. © 2024 Academia Sinica. All rights reserved.
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页码：1291 / 1300
页数：9
相关论文
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