Retracted: Experimental Study on the Settlement Properties of Silt Containing Fine Particles after Liquefaction: Case of Xiong’an New Area of China
This article has been corrected.
VIEW CORRECTIONPublication: International Journal of Geomechanics
Volume 21, Issue 1
Abstract
The site earthquake often causes serious soil liquefaction, especially results in volume change and surface subsidence to cause many secondary disasters. Different from the previous research on volume strain settlement of remolded clean sand after liquefaction, this paper adopts a gel push sampler to obtain undisturbed silt samples with fine particles in Xiong’an New Area of China. Dynamic triaxial tests are carried out on undisturbed and remodeling model soil samples. After the liquefaction failure of the test body occurs, the postliquefaction volumetric strain is measured. Based on the relevant test data, the volume strain characteristics of low plastic silt with fine particles after liquefaction are compared and discussed. The results show that cyclic stress ratio (CSR) is proportional to γmax at the time of failure. The threshold value of the maximum shear stress of the remolded sample is 3.75%, while it is about 7.5% for the undisturbed low plastic silt sample. The repeated shear stress of the undisturbed sample is higher than that of the remolded sample. When the shear strain increases to a certain value, the volume strain tends to a fixed value after liquefaction. The volume strain caused by liquefaction of low plasticity remolded and undisturbed samples is significantly higher than that of clean sand. The maximum shear strain increases with the decrease of liquefaction safety factor. It underestimates the settlement after liquefaction by remolded clean sand or remolded soil sample, and the undisturbed soil sample as the engineering design basis is more in line with the actual soil condition.
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Acknowledgments
This study was supported by the Natural Science Foundation of Hebei Province (Grant No. E2019210126), the Natural Science Foundation of Hebei Province (Grant No. E2019210304), the scientific research project of Hebei Provincial Department of Education (Grant No. ZD2020336), and the Science and Technology Project of Hebei Province (Grant No. 16215408D).
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International Journal of Geomechanics
Volume 21 • Issue 1 • January 2021
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© 2020 American Society of Civil Engineers.
History
Received: May 14, 2020
Accepted: Jul 22, 2020
Published online: Oct 23, 2020
Published in print: Jan 1, 2021
Discussion open until: Mar 23, 2021
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