Experimental study on effects of water content on small-strain shear modulus of undisturbed loess

被引：0

作者：

Jian T. ^{[1
,2
]}

Kong L.-W. ^{[1
]}

Bai W. ^{[1
]}

Wang J.-T. ^{[1
,2
]}

Liu B.-H. ^{[1
,2
]}

机构：

[1] State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan

[2] University of Chinese Academy of Sciences, Beijing

来源：

Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering | 2022年 / 44卷

关键词：

resonant column test; small-strain shear modulus; undisturbed loess; water content;

D O I：

10.11779/CJGE2022S1029

中图分类号：

学科分类号：

摘要：

The small-strain shear modulus and degradation mode of soils provide the important fundamental information for analyzing and evaluating the dynamic response of soils to earthquake in geotechnical engineering. The resonant column tests on the undisturbed loess with different water contents and confining pressures are carried out to investigate the effects of the water content and confining pressure on the small-strain shear modulus. The results show that the water content and confining pressure have significant effects on the shear modulus and degradation mode of the undisturbed loess. More specifically, udner the same water content, the shear modulus increases with an increase in the confining pressure, while an increase in the water content leads to a decrease in the shear modulus. The loess with high water content and low confining pressure shows faster shear modulus degradation. According to the test results, the correlation between the fitting parameters A and n in Hardin’s equation and the water content is analyzed, based on which a modified Hardin’s equation considering the water content is established to predict the maximum shear modulus Gmax of the undisturbed loess. © 2022 Chinese Society of Civil Engineering. All rights reserved.

引用

页码：160 / 165

页数：5

共 16 条

[1]

WANG Jun, WANG Qian, YANG Bao-ping, Et al., Seismic subsidence predication of loess site based on changes of water content[J], Chinese Journal of Rock Mechanics and Engineering, 34, 10, pp. 2155-2160, (2015)

[2]

XU Jie, ZHAO Wen-bo, CHEN Yong-hui, Et al., Experimental study on initial shear modulus and pore-size distribution of unsaturated loess, Chinese Journal of Geotechnical Engineering, 39, S1, pp. 227-231, (2017)

[3]

WANG F T, LI D Q, DU W Q, Et al., Bender element measurement for small-strain shear modulus of compacted loess, International Journal of Geomechanics, 21, 5, (2021)

[4]

CAI Guo-qing, ZHANG Ce, HUANG Zhe-wen, Et al., Experimental study on influences of moisture content on shear strength of unsaturated loess, Chinese Journal of Geotechnical Engineering, 42, S2, pp. 32-36, (2020)

[5]

LI Tian-guo, KONG Ling-wei, SHU Rong-jun, Dynamic shear modulus characteristics of expansive soil with different moisture contents and determination method of in situ G–γ decay curve[J], Journal of Vibration and Shock, 40, 23, pp. 91-99, (2021)

[6]

LIU Bing-heng, KONG Ling-wei, SHU Rong-jun, Et al., Characteristics of small-strain shear modulus of Zhanjiang clay under influence of inherent anisotropy, Chinese Journal of Geotechnical Engineering, 43, S2, pp. 19-22, (2021)

[7]

LI Xiao-mei, WANG Fang, HAN Lin, Et al., Resonant column tests on maximum shear modulus and damping ratio of coral sand[J], Chinese Journal of Geotechnical Engineering, 42, S1, pp. 60-64, (2020)

[8]

AN Liang, DENG Jin, ZHENG Zhi-hua, Et al., Resonance column tests on the dynamic characteristics of remolded loess in Guyuan[J], China Earthquake Engineering Journal, 41, 4, pp. 949-956, (2019)

[9]

SONG Bing-hui, Study on the Dynamic Properties of Lanzhou Loess and Associated Site Response Analysis, (2017)

[10]

SONG B H, TSINARIS A, ANASTASIADIS A, Et al., Small-strain stiffness and damping of Lanzhou loess[J], Soil Dynamics and Earthquake Engineering, 95, pp. 96-105, (2017)

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