Shaking table tests on the lateral response of a pile buried in liquefied sand
Shaking table tests on the lateral response of a pile buried in liquefied sand
复制标题
DOI：
10.1016/j.soildyn.2005.02.021
复制
发表时间：
2006-02-01
影响因子：
4
通讯作者：
Tokimatsu, K
中科院分区：
文献类型：
--
作者：
Dungca, JR;Kuwano, J;Tokimatsu, K
本文对液化侧流作用下的桩侧阻力进行了试验研究。为了观察液化过程中桩周土体的情况，将其建模为一个埋地圆柱，对应于原型桩在地基中一定深度处的截面模型。为了在模型地面上创造真实的应力条件，将模型制备在密封容器中，并通过橡胶压力袋将覆盖层压力施加到地面上。模型桩由电液致动器通过两侧连接的杆进行前后驱动。本文主要研究了当桩土之间产生较大相对位移时，桩周液化土的变形。研究了液化砂中加载速率对桩侧阻力的影响以及相对密度对桩侧阻力的影响。试验结果表明，加载速率越高，所调动的阻力越大。加载速率越高，圆柱侧阻力所需的位移越小。随着土的相对密度增大，桩前土的剪胀性也增大。(c) 2005年Elsevier Ltd出版
This paper presents an experimental study on the lateral resistance of a pile subjected to liquefaction-induced lateral flow. To observe the soil surrounding the pile during liquefaction, it was modeled as a buried cylinder that corresponded to a sectional model of the prototype pile at a certain depth in the subsoil. In order to create a realistic stress condition in the model ground, the model was prepared in a sealed container and the overburden pressure was applied to the ground surface by a rubber pressure bag. The model pile was actuated back and forth through rods attached on each side by an electro-hydraulic actuator.This paper focuses on observing the deformation of the liquefied soil surrounding the pile when a large relative displacement between the pile and the soil is induced. The loading rate effect on the lateral resistance of the pile in the liquefied sand and the influence of the relative density are also investigated.Test results show that a larger resistance is mobilized as the loading rate becomes higher. When the loading rate is higher, the cylinder displacement required for the lateral resistance becomes smaller. It has been also observed that as the relative density of the soil increases, dilatancy of the soil in front of the pile also increases. (c) 2005 Published by Elsevier Ltd.