A Study on Liquefaction-Induced Ground Large Displacement

作者对液化诱发斜坡地面位移机理的研究是基于以往地震具体发生的案例研究、液化土特性试验和振动台模型地面试验。本文的主要结论是：(1)液化土在地面流动过程中表现为假塑性液体，但在地震运动情况下，液化土的刚度迅速恢复，恢复到固体状态；(2)模型地基与实际地基具有由雷诺数决定的相似规律，地表流速与液化土黏度系数分别与液化层厚度的平方根、厚度的立方的平方根成正比。最后，在考虑地表梯度、液化土厚度和平均修正n值的基础上，提出了估算倾斜地面水平位移的半经验半理论公式。

The authors' investigation into the mechanisms of liquefaction-induced ground displacements of sloped ground is based on case studies of specific occurrence due to past earthquakes, tests on the characteristics of liquefied soil, model ground experiments by shaking tables. The following were obtained as the main conclusions of the present paper :(1) Liquefied soil behaves as a pseudoplastic liquid during ground flow, but after the earthquake motion cases, the stiffness of the liquefied soil rapidly recovers and it returns to behaving as a solid body ;(2) A similitude law determined by the Reynolds number can be applied between model ground and actual ground, and that the velocity of ground flow and coefficient of viscosity of liquefied soil are proportional to the square root of the liquefied layr thickness, and the square root of the thickness cubed, respectively.Finally, the authors propose a semi-empirical and semi-theoretical formula for estimating the horizontal displacement of sloped ground, where surface gradient, liquefied soil thickness, and mean modified N-values are taken into consideration.