黏粒含量对粉质土液化发生的作用机制

许国辉; 刘会欣; 刘锦昆; 于月倩

doi:10.3724/SP.J.1140.2012.03031

黏粒含量对粉质土液化发生的作用机制

1 中国海洋大学海洋环境与生态教育部重点实验室, 青岛 266100;

2 中国海洋大学环境科学与工程学院, 青岛 266100;

3 河北省地矿局秦皇岛矿产水文工程地质大队, 秦皇岛 066001;

4 胜利油田胜利勘察设计研究院有限公司, 东营 257026

基金项目:
山东省自主创新成果转化重大专项项目(2009ZHZX1C1102)

国家自然科学基金项目(41076021,41072216)

国家海洋局海洋公益性行业科研专项项目(201005005-6)

详细信息

作者简介: 许国辉(1972-),男,博士,研究方向为海洋工程地质、海岸工程环境,E-mail:xuguohui@ouc.edu.cn

中图分类号: P736.2

收稿日期: 2011-10-20

修回日期: 2012-02-13

ROLE OF CLAY CONTENT IN SILTY SOIL LIQUEFACTION

1 Key Lab of Marine Environmental Science and Ecology, Ministry of Education, Ocean University of China, Qingdao 266100, China;

2 College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China;

3 Mineral Hydrological Engineering Geology Team of Qinhuangdao, Geology and Mineral Resources Bureau of Hebei Provience, Qinhuangdao 066001, China;

4 Shengli Engineering & Consulting Co., Ltd, Dongying 257026, China

Received Date: 20 October 2011

Revised Date: 13 February 2012

摘要

摘要: 近年来,海岸沉积的粉质土在波浪作用下发生液化的问题开始被关注和研究。由于粉质土中含有黏粒成分,其液化机制可能与砂性土不同。通过对不同黏粒含量的粉质土进行循环荷载三轴试验,获得孔压、应变的变化曲线。以应变5%为土体破坏标准,结合土体的微结构特征,分析认为粉质土由于黏粒含量不同,存在液化破坏和触变破坏两种导致液化发生的机制。
- 粉质土 /
- 液化 /
- 触变 /
- 动力三轴实验
Abstract: The coastal sedimentary silty soil is easy to be liquefied under wave action. In recent years, this issue has become a common concern of studies. Since the silty soil contains certain amount of clay, its liquefaction mechanism is different from sands. Through dynamic triaxial experiments carried out for the silty soil with different clay contents, we obtained the relation curve between pore pressure and strain. Take ε=5% as the criterion for soil failure, we discussed the results of experiments in this paper together with the micro-texture of the soil. It suggests that the liquefaction of the silty soil includes two types of mechanisms, i.e. liquefaction and thixotropy, depending upon clay contents.
- silty soil /
- liquefaction /
- thixotropy /
- dynamic triaxial test

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参考文献(8)

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黏粒含量对粉质土液化发生的作用机制

1 中国海洋大学 海洋环境与生态教育部重点实验室, 青岛 266100; 2 中国海洋大学 环境科学与工程学院, 青岛 266100; 3 河北省地矿局 秦皇岛矿产水文工程地质大队, 秦皇岛 066001; 4 胜利油田胜利勘察设计研究院有限公司, 东营 257026

作者简介: 许国辉(1972-),男,博士,研究方向为海洋工程地质、海岸工程环境,E-mail:xuguohui@ouc.edu.cn

ROLE OF CLAY CONTENT IN SILTY SOIL LIQUEFACTION

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目录

1 中国海洋大学海洋环境与生态教育部重点实验室, 青岛 266100;

2 中国海洋大学环境科学与工程学院, 青岛 266100;

3 河北省地矿局秦皇岛矿产水文工程地质大队, 秦皇岛 066001;

4 胜利油田胜利勘察设计研究院有限公司, 东营 257026