[1]孙 昊,赵万玉,游 勇,等.梯-潭结构型泥石流排导槽消能特征试验研究[J].防灾减灾工程学报,2019,39(01):132-140.[doi:10.13409/j.cnki.jdpme.2019.01.018]
 SUN Hao,ZHAO Wanyu,YOU Yong,et al.Experimental Study on Energy Dissipation Characteristics of Debris Flow in a Drainage Channel with Step-pool Configuration[J].Journal of Disaster Prevention and Mitigation Engineering,2019,39(01):132-140.[doi:10.13409/j.cnki.jdpme.2019.01.018]
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梯-潭结构型泥石流排导槽消能特征试验研究()
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防灾减灾工程学报[ISSN:1672-2132/CN:32-1695/P]

卷:
39卷
期数:
2019年01期
页码:
132-140
栏目:
论文
出版日期:
2019-02-28

文章信息/Info

Title:
Experimental Study on Energy Dissipation Characteristics of Debris Flow in a Drainage Channel with Step-pool Configuration
文章编号:
1672-2132(2019)01-0132-09
作者:
孙 昊123 赵万玉12 游 勇12 陈晓清12 陈剑刚12
1.中国科学院水利部成都山地灾害与环境研究所, 四川 成都 610041; 2.中国科学院山地灾害与地表过程重点实验室, 四川成都 610041; 3.中国科学院大学, 北京 100049
Author(s):
SUN Hao123 ZHAO Wanyu12 YOU Yong12 CHEN Xiaoqing12 CHEN Jiangang12
1.Institute of Mountain Hazards and Environment, CAS, Chengdu 610041, China; 2.Key Laboratory of Mountain Hazards and Surface Processes, CAS, Chengdu 610041, China; 3.University of Chinese Academy of Sciences, Beijing 100049, China
关键词:
梯-潭结构 泥石流排导槽 消能特征 水槽试验
Keywords:
step-pool configuration debris flow drainage channel energy dissipation flume experiments
分类号:
P642.23
DOI:
10.13409/j.cnki.jdpme.2019.01.018
文献标志码:
A
摘要:
梯-潭结构型排导槽是一种适用于大比降沟床条件下的泥石流排导工程措施,因其良好的防治功效和工程价值而具有较好的应用前景。选取泥石流容重、规模和潭深为主要影响因素,通过水槽试验模拟泥石流在梯-潭结构型排导槽中的运动过程。结果表明,潭内表层铺填的砾石在泥石流浆体强烈的紊动和大颗粒冲击碰撞下发生明显的物质交换现象,且排导过渡性泥石流时物质交换现象最为强烈,稀性泥石流次之,粘性泥石流则相对较弱; 梯-潭结构型排导槽的消能主要体现在泥石流通过梯-潭结构时泥深变化和加剧紊流两个方面; 梯-潭结构的消能效率与潭深呈正相关关系,且消能率基本大于20%,最大消能率可达73.93%。当潭深过大时,梯-潭结构对泥石流表现出明显的拦截作用,虽消能效果明显,但与排导宗旨相悖。而泥石流规模对梯-潭结构消能的影响相对较小,整体呈现规模越小消能率越高的趋势。
Abstract:
The drainage channel with step-pool configuration, which is one of debris flow drainage works and is used in gully with steep gradient, has a good potential application because of its high-performance control effect and engineering value.In order to explore the characteristics of debris flow in a drainage channel with step-pool configuration, debris flow bulk density, scale and depth of step-pool configuration are selected as the main affecting factors and a series of flume experiments are carried out.Debris flow pattern, time-averaged depth and a phenomenon of interchange of materials were investigated along with the characteristics of energy dissipation in this paper.According to the experimental results, the phenomenon was most intense when debris flow with 17 kN/m3 passed through a drainage channel than the other two.And the energy dissipation is mainly shown in the aspects of flow depth changing and turbulence intensifying.The analysis also indicates that the ratio of energy dissipation increased as depth of step-pool configuration increased and was more than 20% basically.The maximum observed ratio of energy dissipation was 73.93% in the experiment where debris flow bulk density was 14 kN/m3, scale was 0.5 m3 and depth of step-pool configuration was 30 cm.However, the step-pool configuration with overlarge depth performed evident trapping sediment which contraries the purpose of transporting sediment.Besides, the energy dissipation decreased with the debris flow scale, which had fewer effect than the other two factors.

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备注/Memo

备注/Memo:
收稿日期:2017-08-04; 修回日期:2017-12-18 基金项目:国家自然科学基金项目(51641908)、中国科学院科技服务网络计划项目(KFJ-STS-ZDTP-015)资助 作者简介:孙 昊(1993-),男,硕士。主要从事泥石流减灾理论与试验研究。Email:snghyro93@163.com 通讯作者:游 勇(1964-),男,研究员,博导,硕士。主要从事泥石流运动机理及综合防治技术研究。 Email:yyong@imde.ac.cn
更新日期/Last Update: 2019-02-20