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滑坡转化泥石流起动的人工降雨试验研究

文献类型:期刊论文

作者陈晓清; 李泳; 崔鹏
刊名岩石力学与工程学报
出版日期2006
卷号25期号:1页码:106-116
关键词工程地质 滑坡 泥石流 人工降雨试验
其他题名ARTIFICIAL RAINI LL EXPERIM ENTAL STUDY oN LANDSLIDE TRANSLATIoN To DEBRIS FLOW
通讯作者陈晓清
合作状况其它
中文摘要滑坡转化泥石流起动的人工降雨试验研究是把握滑坡转化泥石流过程和机制的重要研究手段。选择泥石流典型流域——云南蒋家沟上游泥石流形成源地的弯房子和下游泥石流堆积地的大凹子沟口分别进行野外人工降雨原型试验。通过对全流域泥石流形成背景的考察来确定典型坡度、土体特征和植被条件等因素,从而选定试验地点。共实施了8场野外人工降雨下滑坡转化泥石流起动试验。采用国内外较为先进的试验设备和观测手段,实时监测了试验过程中土体特征参数的变化,包括土体水势、体积含水量、孔隙水压力和温度等,并录相观测试验过程中发生的现象。通过初步分析发现,泥石流宽级配砾石土具有以下特征:(1)在强降雨下,滑坡转化泥石流的起动机制是振动软化或液化;(2)土体破坏时可能处于饱和状态,也可能处于非饱和状态,试验结果并不支持饱和液化机制;(3)在泥石流源地试验时,部分试验的水势曲线在下降过程中表现出短时间的剧烈波动现象,表明土体破坏过程中存在土体强度的降低和恢复的交替过程:(4)土体破坏过程中存在能量交换;(5)在强降雨下,滑坡启动与泥石流形成是一个连续过程,土体破坏过程中表现出了泥石流的特征。
英文摘要It is important to grasp the process of landslide translation to debris flow on the basis of the experiment
of landslide tran slation to debris flow.Four artificial rainfall experiments have been carded out at W anfan gzi,
located in the debris flow source area of Jiangjia Ravine,and other four experiments have been performed at the
deposit area.The Jiangjia Ravine is a famous debris flow gully.After investigating whole drainage area,the
conditions and locations of these experiments are determined.In the process of these experiments, some soil
parameters have been measured through some advanced equipments.These parameters are water potential,water
content,pore water pressure and soil temperature.After primary analysis have been completed, some basic
characteristics of wide—graded gravel soil are presented.Main conclusions include:(1)under the sVong—intense
rainfall, the mechanism of landslide translation to debris flow is the vibration softening or the vibration
liquefaction, and the soil strength call be expressed by the function of grain grade, saturation,and pore water
pressure induced by the vibration and infiltration rate;(2)when soil is broken,the soil may be unsaturated,SO the mechanism of saturation liquefaction has not been applied:(3)when the curve of water potential declines,the
process of soil strength fluctuation will be validated;(4)the energy exchange exists in the process of soil break;
and(5)under the s~ong—intensity rainfall,it is difficult to distinguish the start of landslide against the formation of
debris flow,because the characteristics of debris flow appear when soil is broke.
分类号P642.22;P481
资助信息国家自然科学基金资助项目(40501008);国家杰出青年科学基金资助项目(40025103)
语种中文
公开日期2010-08-24
源URL[http://ir.imde.ac.cn/handle/131551/1578]  
专题成都山地灾害与环境研究所_成都山地所知识仓储(2009年以前)
成都山地灾害与环境研究所_山地灾害与地表过程重点实验室
推荐引用方式
GB/T 7714
陈晓清,李泳,崔鹏. 滑坡转化泥石流起动的人工降雨试验研究[J]. 岩石力学与工程学报,2006,25(1):106-116.
APA 陈晓清,李泳,&崔鹏.(2006).滑坡转化泥石流起动的人工降雨试验研究.岩石力学与工程学报,25(1),106-116.
MLA 陈晓清,et al."滑坡转化泥石流起动的人工降雨试验研究".岩石力学与工程学报 25.1(2006):106-116.

入库方式: OAI收割

来源:成都山地灾害与环境研究所

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