循环荷载作用下海床结构粉质土的液化渗流机理定性研究

›› 2007, Vol. 28 ›› Issue (8): 1631-1635.

循环荷载作用下海床结构粉质土的液化渗流机理定性研究

陈友媛¹，刘红军¹，贾永刚¹，丛艳平²

1.中国海洋大学环境科学与工程学院/海洋环境与生态教育部重点实验室，青岛 266003；2.中国海洋大学信息科学与工程学院，青岛 266003

收稿日期:2005-09-27 出版日期:2007-08-10 发布日期:2013-10-15
作者简介:陈友媛，女，1966年生，博士研究生，副教授，主要从事环境水文地质研究与教学。
基金资助:
国家自然科学基金资助项目（No. 40472137）。

Qualitative study on mechanism of liquefaction and seepage of seabed structure silty soil under cyclic loads

CHEN You-yuan¹, LIU Hong-jun¹, JIA Yong-gang¹, CONG Yan-ping²

1. College of Environmental Science and Engineering, Key Lab of Marine Environmental Science and Ecology, Ministry of Education, Ocean University of China, Qingdao 266003, China; 2. College of Information Science and Engineering, Ocean University of China, Qingdao 266003, China

Received:2005-09-27 Online:2007-08-10 Published:2013-10-15

摘要/Abstract

摘要： 通过对黄河三角洲海床粉质土的基本性质和循环荷载作用下的喷水冒砂现象的分析，认识了海床粉质土的结构性。利用岩土破损力学原理，建立了海床结构粉质土的二元介质模型。定性分析了结构带土体在加荷、卸荷、液化渗流过程中的变形破损和在液化渗流过程中有效应力和超孔隙水压力的相互转化，指出在液化深度内，土体恢复后的固结强度应提高。这与试验结果相一致。用二元介质模型对解释试验中液化渗流差异是结构带内出现喷水冒砂和结构体上出现遍地冒水现象。

关键词: 循环荷载, 海床结构粉质土, 二元介质模型, 液化渗流, 有效应力原理

Abstract: The structure of the seabed silty soil in the Yellow River delta is understood by its properties and piping phenomena under cyclic loads. Applying breakage mechanics, a double-medium model composed of structural lumps and structural bands is established. During the process of increase loads, decrease loads and liquefaction seepage, deformation and breakage in the structural bands and exchange of effective stress and pore water pressure are qualitatively researched. Qualitative analysis indicates that the strength of consolidation should be increased within the depth of liquefaction, which accords with the result of test. Experiment shows that the different phenomena of liquefaction seepage are regarded as cause of existing piping in structural bands and water discharge in structural lumps with the double-medium modeling.

Key words: cyclic loads, seabed structure silty soil, double-medium model, liquefaction seepage, effective stress principle

中图分类号:

TU 413.5

陈友媛，刘红军，贾永刚，丛艳平 . 循环荷载作用下海床结构粉质土的液化渗流机理定性研究[J]. , 2007, 28(8): 1631-1635.

CHEN You-yuan , LIU Hong-jun , JIA Yong-gang , CONG Yan-ping . Qualitative study on mechanism of liquefaction and seepage of seabed structure silty soil under cyclic loads[J]. , 2007, 28(8): 1631-1635.

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