Abstract

The proposed research of this experimental investigation aims to study the effects of fines content, fabrics type and confining pressure on the undrained shear strength response of Chlef sand-silt mixtures under static loading conditions using the equivalent void ratio (e*) and equivalent state parameter (ψ*) concepts. For this purpose, a series of undrained monotonic triaxial tests was carried out on reconstituted saturated sand-silt mixture samples with fines content ranging from 0 to 40% (I_p=5%) at an initial relative density (D_r=52%) and subjected to different confining pressures (σ’₃ = 100 kPa, 200 kPa and 300 kPa). The different samples were prepared in such a way that two fabrics types were produced: dry funnel pluviated fabrics and wet deposited fabrics. The obtained results show that the wet deposited fabrics exhibits a higher state parameter (ψ) than the dry funnel pluviated fabrics. The state parameter confirms that the wet deposited fabrics were more vulnerable to liquefaction phenomenon than the dry funnel pluviated ones. Moreover, the obtained data confirm the existence of a linear relationship between the dry funnel pluviation and wet deposition in terms of equivalent void ratio (e*) and exponential relationship in terms of equivalent state parameter (ψ*).

摘要

本实验研究的拟议研究旨在使用等效空隙比 (e*) 和等效状态参数研究细粒含量、织物类型和围压对 Chlef 砂-淤泥混合物在静态载荷条件下不排水剪切强度响应的影响。 (ψ*) 概念。为此，在初始相对密度（D _r =52%）下，对细粉含量范围为 0 至 40%（I _p =5%）的重构饱和砂泥混合物样品进行了一系列不排水单调三轴试验。并承受不同的围压（σ' ₃= 100 kPa、200 kPa 和 300 kPa)。不同样品的制备方式是生产两种织物类型：干式漏斗熔喷织物和湿法沉积织物。所得结果表明，湿沉积织物比干漏斗熔渗织物具有更高的状态参数 (ψ)。状态参数证实湿沉积织物比干漏斗冲积织物更容易发生液化现象。此外，所获得的数据证实了干漏斗雨淋和湿沉降在等效孔隙比（e*）和等效状态参数（ψ*）方面的指数关系之间存在线性关系。