Abstract

An experimental investigation was conducted to study the effect of pore fluid chemistry on the dynamic behavior of reconstituted marine clay. Sodium chloride solution of 0.4 M and 1 M concentrations was used to induce the physicochemical changes. Strain-controlled undrained cyclic triaxial tests were carried out to evaluate the most important parameters such as shear modulus and damping ratio at a large strain range. The results showed that the effect of pore fluid was more pronounced on cyclic shear modulus values at a strain amplitude of 0.3–1%. Tests were also conducted to study the effect of physicochemical factors on the degradation of normalized modulus G_N/G₁ of marine clay specimens reconstituted with distilled water and salt solutions.

摘要

进行了一项实验研究，以研究孔隙流体化学对再生海洋粘土动态行为的影响。使用0.4 M和1 M浓度的氯化钠溶液来诱导物理化学变化。进行了应变控制不排水循环三轴试验，以评估大应变范围内最重要的参数，例如剪切模量和阻尼比。结果表明，应变幅为0.3%~1%时，孔隙流体对循环剪切模量的影响更为明显。还进行了测试，研究物理化学因素对用蒸馏水和盐溶液重构的海洋粘土样本的归一化模量G _N / G ₁退化的影响。