[1]王子寒,张彪,景晓昆,等.土工格室防治坡面型泥石流启动机理研究[J].自然灾害学报,2022,31(05):140-149.[doi:10.13577/j.jnd.2022.0516]
 WANG Zihan,ZHANG Biao,JING Xiaokun,et al.Study on starting mechanism of slope debris flow with geocell prevention[J].,2022,31(05):140-149.[doi:10.13577/j.jnd.2022.0516]
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土工格室防治坡面型泥石流启动机理研究
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《自然灾害学报》[ISSN:/CN:23-1324/X]

卷:
31
期数:
2022年05期
页码:
140-149
栏目:
出版日期:
2022-10-28

文章信息/Info

Title:
Study on starting mechanism of slope debris flow with geocell prevention
作者:
王子寒 张彪 景晓昆 肖成志 黄达
河北工业大学 土木与交通学院, 天津 300401
Author(s):
WANG Zihan ZHANG Biao JING Xiaokun XIAO Chengzhi HUANG Da
School of Civil and Transportation Engineering, Hebei University of Technology, Tianjin 300401, China
关键词:
加筋土土工格室泥石流降雨滑坡细粒含量
Keywords:
reinforced soilgeocelldebris flowrainfall landslidefine grain content
分类号:
TU443;X43
DOI:
10.13577/j.jnd.2022.0516
摘要:
在降雨条件下进行有/无格室加筋的坡面型泥石流启动室内水槽试验,对比分析了细粒含量、启动现象、启动时间、位移场云图和含水率等参数的变化,总结了土工格室对不同级配砂土坡体的防护效果,揭示格室防治坡面型泥石流的启动机理。结果表明:格室防护能够有效改变坡面泥石流启动形态,延长启动时间。随细粒含量增加,坡面启动比线性减小,启动时间延长比呈抛物线变化;细粒含量适中(15%)时的延长作用减弱,细粒含量较大(15%~25%)时破坏方量会增大。格室具有蓄水、加筋及调配雨水入渗的作用,粗粒较多时减缓渗流;细粒较多时能够排水并减缓冲刷。格室对防治坡面型泥石流启动具有非常积极的作用,结合其他防治手段,可实现坡面泥石流的有效防治。
Abstract:
The indoor flume tests of slope debris flow with and without geocell protection are conducted in rainfall condition. The parameter variations including fine grain content ,starting phenomenon,time consumption, displacement cloud,and water content are comparatively analyzed. The protective effects of geocell on slopes consisting of different grading sand are concluded. The starting mechanism of slope debris flow with geocell prevention is revealed. The results show that,with geocell protection,starting patterns of slope debris flow can be changed effectively,and starting time consumptions can be extended. With increasing fine grain contents,the slide area proportions of slope have a linear reduction,and the extensions of stating time present a parabolic relation. When the fine grain content is moderate(15%),the effect of extension of stating time decreases. When fine grain content is larger(15%~25%),the destruction degree increases. The effects of geocell are ponding water,reinforcing soil, adjusting rain water seepage,retarding seepage flow in more coarse grains condition,and draining water and reducing flush in more fine grains condition. The geocell has a very positive effect on preventing slope debris flow. Combining other preventive measures,the effective prevention on slope debris flow is realizable.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2021-7-16;改回日期:2022-1-5。
基金项目:国家自然科学基金项目(51808184, 41877255); 河北省高等学校科学技术研究项目(QN2021039)
作者简介:王子寒(1984-),男,副教授,博士,主要从事岩土体细观力学及离散元分析等方面的研究.E-mail:wangzihan@hebut.edu.cn
通讯作者:景晓昆(1983-),女,讲师,博士,主要从事岩土工程方面的研究.E-mail:jingxk@hebut.edu.cn
更新日期/Last Update: 1900-01-01