[1]孙 鑫,陈星竹,刘 威*.基于转鼓实验的泥石流稳态运动特征研究[J].山地学报,2026,(1):51-62.[doi:10.16089/j.cnki.1008-2786.000946]
　SUN Xin,CHEN Xingzhu,LIU Wei*.Steady-State Motion Characteristics of Debris Flow Based on Rotating Drum Experiments[J].Mountain Research,2026,(1):51-62.[doi:10.16089/j.cnki.1008-2786.000946]
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基于转鼓实验的泥石流稳态运动特征研究()

《山地学报》[ISSN:1008-2186/CN:51-1516]

卷:
期数:
2026年第1期
页码:
51-62
栏目:
山地灾害
出版日期:
2026-02-20

文章信息/Info

Title:
Steady-State Motion Characteristics of Debris Flow Based on Rotating Drum Experiments
文章编号:
1008-2786-(2026)1-051-12
作者:
孙 鑫1; 陈星竹2; 刘 威3*
(1. 甘肃省地质环境监测院 兰州城市地质灾害野外科学观测研究站,兰州730050; 2. 江苏南京地质工程勘察院有限公司,南京210041; 3. 中国科学院、水利部成都山地灾害与环境研究所,成都 610213)
Author(s):
SUN Xin1;  CHEN Xingzhu2;  LIU Wei3*
(1. Observation and Research Station of Geological Disaster in Lanzhou, Gansu Provincial Institute ofGeo-Environmental Monitoring, Lanzhou 730050, China; 2. Jiangsu Nanjing Geological Engineering SurveyInstitute CO., LTD, Nanjing 210041, China; 3. Institute of Mountain Hazards and Environment,Chinese Academy of Sciences & Ministry of Water Resource, Chengdu 610213, China)
关键词:
泥石流;  稳态流动;  运动特征;  转鼓试验
Keywords:
debris flow;  steady-state flow;  motion characteristics;  rotating drum experiment
分类号:
TU 443
DOI:
10.16089/j.cnki.1008-2786.000946
文献标志码:
A
摘要:
泥石流运动特征值是泥石流防治工程设计的关键参数,泥石流稳态运动是描述其动力学行为的重要窗口,但相关研究尚显不足。本文基于转鼓试验,系统研究了泥石流的稳态运动特征,定量分析了固相浓度、液相粘度及流速等关键参数对其运动行为的影响。研究发现,(1)给定试验条件下,液相粘度改变对泥石流底部孔隙水压力影响显著(峰值变化幅度约0.6 kPa); 流速变化对泥石流底部正应力影响较小(峰值变化幅度约0.1 kPa),但明显促进了泥石流的扩散行为; 固相浓度对泥石流底部正应力影响显著(峰值变化幅度约1.35 kPa)。(2)泥石流固液分离现象对液相粘度最为敏感,对固相浓度和流速的敏感性相对较弱。(3)泥石流内部颗粒剪胀作用致使孔隙水压力发生变化,且不同位置处颗粒剪胀趋势差异是导致孔隙水压力不均匀分布的重要因素。研究成果可为泥石流运动预测和风险评估提供理论支撑。
Abstract:
Motion characteristic parameters of debris flows are critical for the design of debris flow mitigation structures. The steady-state motion of debris flow serves as an important indication for describing its dynamic behavior, yet relevant research remains inadequate.
Based on rotating drum experiments, this study systematically investigated the steady-state motion characteristics of debris flows and quantitatively analyzed the effects of key parameters - including solid-phase concentration, fluid viscosity, and flow velocity - on their kinematic behavior.
(1)It found that under given experimental conditions, changes in liquid-phase viscosity significantly affected the pore water pressure at the bottom of debris flow(with a peak variation amplitude of approximately 0.6 kPa); flow velocity had a relatively minor influence on the normal stress at the bottom of debris flow(with a peak variation amplitude of approximately 0.1 kPa)but notably promoted the behavior of debris flow spreading; solid-phase concentration exerted a significant effect on basal normal stress(with a peak variation amplitude of approximately 1.35 kPa).
(2)The solid-liquid separation phenomenon in debris flow is most sensitive to liquid-phase viscosity and relatively less sensitive to solid-phase concentration and flow velocity.
(3)The dilatancy effect of particles within debris flow caused changes in pore water pressure, and the differences in particle dilatancy trends at different locations were important factors contributing to heterogeneous distribution of pore water pressure.
The research findings can provide theoretical support for debris flow movement prediction and risk assessment.

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备注/Memo

备注/Memo:
收稿日期(Received date): 2025- 09- 06; 改回日期(Accepted date):2026- 01-22
基金项目(Foundation item): 国家自然科学基金(42277179)。[National Natural Science Foundation of China(42277179)]
作者简介(Biography): 孙鑫(1986-),男,甘肃兰州人,高级工程师,主要研究方向:泥石流监测预警。 [SUN Xin(1986-), male, born in Lanzhou, Gansu Province, senior engineer, research on debris flow monitoring and early warning] E-mail: 13619320038@163.com
*通讯作者(Corresponding author): 刘威(1988-),男,博士,副研究员,主要研究方向:泥石流形成机理。[LIU Wei(1988-), male, Ph.D., associated professor, specialized in debris flow formation mechanism] E-mail: spon@imde.ac.com
更新日期/Last Update: 2026-01-30