Classification and analysis of density-dependent state parameters for sand

被引：0
|
作者：
Yao Y. [1 ]
Chen K. [1 ]
机构：
[1] Beihang University, Beijing
来源：
Tumu Gongcheng Xuebao/China Civil Engineering Journal | 2023年 / 56卷 / 09期
关键词：
CSUH model; porosity ratio; reference line; sand; state parameters;
D O I：
10.15951/j.tmgcxb.22030231
中图分类号：
学科分类号：
摘要：
Strength and deformation of soil is closely related to its density, so density or density⁃related physical quantity should be considered as a state parameter to reflect its influence on stress⁃strain relationship. Hence, according to their characteristics, the state parameters are divided into initial porosity ratio e0, relative porosity ratio γ based on normal compression line or overconsolidation ratio OCR, relative porosity ratio ψ based on critical state line and relative porosity ratio ξ based on dynamic anisotropic compression line, and the relationship and difference between the state parameters are analyzed. It is proved that sand has a unique NCL and its initial point coincides with CSL. The state parameter ξ takes the anisotropic compression line covering NCL and CSL as the reference line, and corrects the problems that the state parameter ψ is not applicable to isotropic compression, K0 compression or other stress paths. Based on CSUH model, the influence of state parameters ψ and ξ on the calculation results under different stress paths is analyzed. The results show that compared with the state parameter ψ, the stress⁃strain relationship calculated by CSUH model with the state parameter ξ is more suitable for various complex stress paths. © 2023 Editorial Office of China Civil Engineering Journal. All rights reserved.
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页码：116 / 124
页数：8
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