不同颗粒组分下泥石流离心机模型试验研究

周健; 杨浪; 王连欣; 张娇

doi:10.11779/CJGE201512005

不同颗粒组分下泥石流离心机模型试验研究 English Version

周健^{1, 2},
杨浪^{1, 2},
王连欣³,
张娇⁴

1. 同济大学地下建筑与工程系,上海 200092;
2. 同济大学岩土及地下工程教育部重点实验室,上海 200092;
3. 中铁第四勘察设计院集团有限公司,湖北武汉 430063;
4. 上海城市管理职业技术学院土木工程与交通学院,上海 200432

基金项目: 国家自然科学基金项目（41272296,51479138）

详细信息

作者简介:
周健(1957- ),男,博士,教授,博士生导师,主要从事土动力学、土体细观力学与离散元数值模拟等方面的研究工作。E-mail: tjugezhoujian@tongji.edu.cn。

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出版历程
- 收稿日期: 2014-09-22
- 发布日期: 2015-12-19

Centrifugal model tests on debris flow with different particle compositions

ZHOU Jian^{1, 2},
YANG Lang^{1, 2},
WANG Lian-xin³,
ZHANG Jiao⁴

1. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China;
2. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China;
3. China Railway Fourth Survey and Design Institute Group Co., Ltd., Wuhan 430063, China;
4. Department of Civil Engineering and Transportation, Shanghai Polytechnic College, Shanghai 200432, China

摘要

摘要: 采用自主研发的离心机可视化试验装置,在坡度和降雨强度不变的条件下,进行降雨诱发泥石流离心机模型试验,研究不同颗粒组分对泥石流形成形态的影响。通过配置五组不同细颗粒含量的土样进行20g加速度下的离心机试验,分析宏观位移场、水分迁移、孔隙水压力等,研究不同颗粒组分下泥石流的形成机理。研究结果表明：随着细颗粒含量由10%增大至70%,泥石流破坏形态由分层滑动型破坏向整体流滑型破坏转变;不同颗粒组分下渗透系数的不同,是泥石流不同破坏形态的主要原因。
- 降雨诱发泥石流 /
- 离心机模型试验 /
- 颗粒组分 /
- 渗透系数
Abstract: Using the self-developed visualization test apparatus with constant slope and rainfall intensity, centrifuge model tests on rainfall-induced debris flow are carried out in order to study the formation mechanism of debris flow under different particle compositions. The test conditions include 20 times of gravity, five soil samples and different fine particle contents. Through the analysis of macroscopic displacement fields, moisture migration and pore water pressures under different particle compositions, different morphological characteristics of debris flow are observed and discussed. The test results indicate that the failure pattern of debris flow changes from retrograded sliding to whole flow sliding with the increasing content of fine particles from 10% to 70%. And the difference of permeability coefficient under different particle compositions is the major cause for different failure patterns of debris flow.
- rainfall-induced debris flow /
- centrifugal model test /
- particle composition /
- permeability coefficient

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参考文献(19)

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