基于SCPTU原位状态参数确定方法及液化应用试验研究

doi:10.13722/j.cnki.jrme.2018.0269

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Abstract The state parameter can be used to effectively evaluate the relative density and liquefaction potential of the cohesionless soil. However，at present，the determination of state parameter is mainly dependent on laboratory tests，and it is difficult to reflect the real state of the field. The seismic wave piezocone test(SCPTU) can provide in-situ parameters such as cone tip resistance，sleeve friction resistance，pore water pressure and shear wave velocity. Based on the research results of SCPTU testing to determine the state parameter and SCPTU testing data of the three sites，firstly，the different evaluation methods of state parameter are compared，secondly，the correlation between the normalized shear wave velocity(Vs1) and in-situ state parameter is established，and the contour lines of state parameter profile in the plane of the shear wave velocity and the effective vertical stress(Vs-?′v0) are drawn，thirdly，the revised model of the relationship between normalized small strain stiffness(G0/qc) and state parameter has been proposed. Finally，these proposed methods are applied to the evaluation of the density and liquefaction potential of the cohesionless soil. The results show that the two calculation methods proposed in this paper can effectively evaluate the state parameter of the cohesionless soil，and the state parameter evaluated can be effectively used for evaluating the dense state and reliably discriminating liquefaction potential.

Key words： soil mechanics seismic wave piezocone test(SCPTU) in situ state parameter relative density liquefaction

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	Articles by authors
	DUAN Wei1
	2
	CAI Guojun1
	2
	LIU Songyu1
	2
	ZOU Haifeng1
	2
	YUAN Jun1
	2

Cite this article:

DUAN Wei1,2,CAI Guojun1, et al. Experimental study on determination method in-situ state parameter and it liquefaction application based on SCPTU[J]. , 2019, 38(S1): 3151-3162.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2018.0269 OR https://rockmech.whrsm.ac.cn/EN/Y2019/V38/IS1/3151

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