Strength and structural anisotropy of loess

WANG Li-qin; ZHAO Cong; HU Xiang-yang; LI Lun; WANG Zheng; LI Kai-yu

doi:10.11779/CJGE2021S1005

Volume 43 Issue S1

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Chinese Journal of Geotechnical Engineering > 2021 > 43(S1): 25-29. > DOI: 10.11779/CJGE2021S1005

WANG Li-qin, ZHAO Cong, HU Xiang-yang, LI Lun, WANG Zheng, LI Kai-yu. Strength and structural anisotropy of loess[J]. Chinese Journal of Geotechnical Engineering, 2021, 43(S1): 25-29. DOI: 10.11779/CJGE2021S1005

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Strength and structural anisotropy of loess

WANG Li-qin^{1, 2,},
ZHAO Cong^{3, 2},
HU Xiang-yang⁴,
LI Lun²,
WANG Zheng²,
LI Kai-yu²

1.
State Key Laboratory of Eco-hydraulics in Northwest Arid Region, Xi'an University of Technology, Xi'an 710048, China
2.
School of Civil Engineering and Architecture, Xi'an University of Technology, Xi'an 710048, China
3.
China Tower Corp.Xuchang Branch, Xuchang 461000, China
4.
Power China Northwest Engineering Corporation Limited, Xi'an 710048, China

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Received Date: December 14, 2020
Available Online: December 05, 2022

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Abstract

Abstract

Undisturbed loess is the structural soil with anisotropy, and its anisotropy has great influences on the stability of slopes, tunnels and underground structures with complex stress state.To study the strength and structural anisotropy of loess, the unconfined compressive strength tests are carried out on the undisturbed and remolded loess samples with different sampling angles(0°, 30°, 45°, 60°and 90°)and different water contents, and the unconfined compressive strength of the corresponding specimens are obtained.The initial structural parameters are calculated.The relationship among the unconfined compressive strength, structural index, soil sampling angle and water content of loess is analyzed.It is found that the strength and structure of loess are the strongest when the sampling angle is 90°and the weakest when the sampling angle is 30°in the tests.The lower the water content, the stronger the strength and structure.With the increase of the water content, the strength and structural anisotropy of undisturbed loess decrease gradually and are the lowest at saturation.
- loess,
- anisotropy,
- structure,
- unconfined compressive strength,
- initial structural parameter

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References (18)

References

[1]	关文章. 湿陷性黄土工程性能新篇[M]. 西安: 西安交通大学出版社, 1992. GUAN Wen-zhang. New Development on Engineering Features of Collapsible Loess[M]. Xi'an: Xi'an Jiaotong University Press, 1992. (in Chinese)
[2]	王丽琴, 邵生俊. 黄土构度与物理指标之间的定量关系[J]. 岩石力学与工程学报, 2015, 34(S2): 4380-4386. https://www.cnki.com.cn/Article/CJFDTOTAL-YSLX2015S2090.htm WANG Li-qin, SHAO sheng-jun. Quantitative relationship between structural and physical indexes of loess[J]. Chinese Journal of Rock Mechanics and Engineering, 2015, 34(S2): 4380-4386. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YSLX2015S2090.htm
[3]	王丽琴, 邵生俊, 赵聪, 等. 黄土初始结构性对其压缩屈服的影响[J]. 岩土力学, 2018, 39(9): 3223-3228, 3236. https://www.cnki.com.cn/Article/CJFDTOTAL-YTLX201809015.htm WANG Li-qin, SHAO Sheng-jun, ZHAO Cong, et al. Effect of initial structural property of loess on its compressive yield[J]. Rock and Soil Mechanics, 2018, 39(9): 3223-3228, 3236. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YTLX201809015.htm
[4]	谭罗荣, 张梅英. 一种特殊土微观结构的研究[J]. 岩土工程学报, 1982, 4(2): 432-437. https://www.cnki.com.cn/Article/CJFDTOTAL-YTGC198202002.htm TAN Luo-rong, ZHANG Mei-ying. Study on the microstructure of a special soil[J]. Chinese Journal of Geotechnical Engineering, 1982, 4(2): 432-437. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YTGC198202002.htm
[5]	谢定义, 齐吉琳. 土结构性及其定量化参数研究的新途径[J]. 岩土工程学报, 1999, 21(6): 651-656. https://www.cnki.com.cn/Article/CJFDTOTAL-YTGC199906000.htm XIE Dingyi, QI Ji-lin. Soil structure characteristics and new approach in research on its quantitative parameter[J]. Chinese Journal of Geotechnical Engineering, 1999, 21(6): 651-656. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YTGC199906000.htm
[6]	谢定义, 齐吉琳, 朱元林. 土的结构性参数及其与变形强度的关系[J]. 水利学报. 1999, 30(10): 1-6. https://www.cnki.com.cn/Article/CJFDTOTAL-SLXB199910000.htm XIE Ding-yi, QI Ji-lin, ZHU Yuan-lin. Soil structure parameter and its relation to deformation and strength[J]. Journal of Hydraulic Engineering, 1999, 30(10): 1-6. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-SLXB199910000.htm
[7]	梁庆国, 赵磊, 安亚芳, 等. 兰州Q₄黄土各向异性的初步研究[J]. 岩土力学, 2012, 33(1): 17-23. https://www.cnki.com.cn/Article/CJFDTOTAL-YTLX201201003.htm LIANG Qing-guo, ZHAO Lei, AN Ya-fang, et al. Preliminary study of anisotropy of Q4loess in Lanzhou[J]. Rock and Soil Mechanics, 2012, 33(1): 17-23. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YTLX201201003.htm
[8]	ARTHUR J R F, MENZIES B K. Inherent anisotropy in a sand[J]. Géotechnique, 1972, 22(1): 115-128.
[9]	徐善常, 梁庆国, 李帅帅, 等. 甘肃定西原状Q₃黄土各向异性试验研究[J]. 地质力学学报, 2015, 21(3): 378-385. https://www.cnki.com.cn/Article/CJFDTOTAL-DZLX201503008.htm XU Shan-chang, LIANG Qing-guo, LI Shuai-shuai, et al. Experimentalstudyonanisotropiccharacteristicsof undisturbed Q₃loess from Dingxi, Gansu[J]. Journal of Geomechanics, 2015, 21(3): 378-385. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-DZLX201503008.htm
[10]	邵生俊, 许萍, 王强, 等. 黄土各向异性强度特性的真三轴试验研究[J]. 岩土工程学报, 2014, 36(9): 1614-1623. https://www.cnki.com.cn/Article/CJFDTOTAL-YTGC201409010.htm SHAO Sheng-jun, XU Ping, WANG Qiang, et al. True triaxial tests on anisotropic strength characteristics of loess[J]. Chinese Journal of Geotechnical Engineering, 2014, 36(9): 1614-1623. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YTGC201409010.htm
[11]	鲁洁, 杨朝旭, 王铁行. 压实黄土强度和变形各向异性的试验研究[J]. 西安建筑科技大学学报(自然科学版), 2016, 48(5): 676-680. https://www.cnki.com.cn/Article/CJFDTOTAL-XAJZ201605011.htm LU jie, YANG Chao-xu, WANG Tie-hang. Experimental research on strength and deformation anisotropy of the compacted loess[J]. Journal of Xi'an University of Architecture&Technology(Natural Science Edition), 2016, 48(5): 676-680. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-XAJZ201605011.htm
[12]	叶朝良, 朱永全, 刘尧军, 等. 原状黄土各向异性及卸载变形特征试验研究[J]. 中国铁道科学, 2014, 35(6): 1-6. https://www.cnki.com.cn/Article/CJFDTOTAL-ZGTK201406001.htm YE Chao-liang, ZHU Yong-quan, LIU Yao-jun, et al. Experimentalstudyontheanisotropyandunloading deformation characteristics of intact loess[J]. China Railway Science, 2014, 35(6): 1-6. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-ZGTK201406001.htm
[13]	张奇莹, 徐盼盼, 钱会. 泾阳原状黄土-古土壤序列抗剪强度各向异性及其机制研究[J]. 岩石力学与工程学报, 2019, 38(11): 2365-2376. https://www.cnki.com.cn/Article/CJFDTOTAL-YSLX201911021.htm ZHANG Qi-ying, XU Pan-pan, QIAN Hui. Study on shear strength anisotropy of undisturbed loess-paleosol sequence in Jingyang County[J]. Chinese Journal of Rock Mechanics and Engineering, 2019, 38(11): 2365-2376. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YSLX201911021.htm
[14]	谌地, 武小鹏, 周有禄, 等. 原状黄土抗剪强度的各向异性研究[J]. 粉煤灰综合利用, 2019, 32(1): 6-9. https://www.cnki.com.cn/Article/CJFDTOTAL-FMLE201901004.htm CHEN Di, WU Xiao-peng, ZHOU You-lu, etal. Anisotropy of shear strength of undisturbed loess[J]. Fly Ash Comprehensive Utilization, 2019, 32(1): 6-9. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-FMLE201901004.htm
[15]	罗传庆, 张吾渝, 李辉, 等. 西宁地区原状黄土强度各向异性试验研究[J]. 工程地质学报, 2016, 24(6): 1327-1332. https://www.cnki.com.cn/Article/CJFDTOTAL-GCDZ201606036.htm LUO Chan-qing, ZHANG Wu-yu, LI Hui, et al. Experimental study on the anisotropic strength of intact loess in Xining[J]. Journal of Engineering Geology, 2016, 24(6): 1327-1332. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-GCDZ201606036.htm
[16]	刘奉银, 吉嶺充俊, 车爱兰, 等. Q3黄土力学各向异性特性的初步试验研究[C]//中国岩石力学与工程学会第七次学术大会论文集. 西安, 2002: 142-144. LIU Fengyin, YOSHIMINE M, CHE Ai-lan, et al. Test investigation on mechanical anisotropy of Q3loess[C].The 7th Conference of the Chinese Society for Rock Mechanics and Engineering. Xi'an, 2002: 142-144. (in Chinese)
[17]	刘祖典. 黄土力学与工程[M]. 西安: 陕西科学技术出版社, 1997. LIU Zu-dian. Loess Mechanics and Engineering[M]. Xi'an: Shaanxi Science and Technology Press, 1997. (in Chinese)
[18]	邵生俊, 郑文, 王正泓, 等. 黄土的构度指标及其试验确定方法[J]. 岩土力学, 2010, 31(1): 15-19, 38. https://www.cnki.com.cn/Article/CJFDTOTAL-YTLX201001004.htm SHAO Sheng-jun, ZHENG Wen, WANG Zheng-hong, et al. Structural index of loess and its testing method[J]. Rock and Soil Mechanics, 2010, 31(1): 15-19, 38. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YTLX201001004.htm