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不同粒径级配条件下工程弃渣泥石流启动机理研究
Alternative TitleSTUDY ON THE THRESHOLD MOTION MECHANISM OF ENGINEERING SLAG DEBRIS FLOW WITH DIFFERENT PARTICLE SIZE GRADING CONDITIONS
刘兴荣1,2; 崔鹏2; 王飞2; 董耀刚1
2018
Source Publication工程地质学报
ISSN1004-9665
Volume26Issue:6Pages:1593-1599
SubtypeArticle
Contribution Rank2
Abstract通过开展室内水槽试验,利用孔隙水压力传感器记录工程弃渣泥石流形成过程中的孔隙水压力变化情况,并运用高清摄像机拍摄工程弃渣的运移及骨架颗粒的破坏现象。试验发现:在相同清水流量作用下,堆积渣体破坏方式主要受渣体中粒径为2 mm的砾粒含量影响较大,当粒径大于2 mm的砾粒含量大于50%时,渣体呈现出的破坏模式主要为冲刷破坏造成的顶面下切,孔隙水压力呈现出陡增的趋势,然后处于平缓;当粒径小于2 mm的砾粒含量均大于65%时(即粒径大于2 mm的砾粒含量小于50%),渣体呈现出的破坏模式主要为渗流作用造成的底面冲蚀,孔隙水压力呈现出弧线上升的特征。
Other AbstractClear water flow is one of the main conditions for debris flow to start. Different water flows can cause debris flow on different scales. Using the indoor flume model experiment,the pore water pressure was measured with piezometer tube at three cross-sections. High resolution camera technology was used to record the movement of engineering slag and the collapse of skeleton particles. The results are used to analyze the phenomenon of slag in the process of debris flow formation. Based on the analysis,the experiment was conducted with fixing the slope angle of flume device of 8 degree. The clear water flow discharge was of 0.083 and 0.409 L·s~(-1) respectively. The test results were used to analyze the effect of the flow state on soil particles failure and debris flow initiation under different clear water flow discharges. Under the action of the same clear water flow,the failure mode of the accumulated slag was mainly affected by the content of gravel particles. And the particle size of 2 mm in the slag had a greater influence on the content of gravel. When the particle size was larger than 2 mm and the content of gravel was greater than 50%, the failure mode of slag was mainly the undercut caused by erosion. The pore water pressure appeared increasing at beginning,and then stable. When the particle size was less than 2 mm and the content of gravel was greater than 65%, the failure mode of slag was mainly the bottom erosion caused by seepage. The pore water pressure was characterized by an arc-shaped rising with time.
Keyword清水流量 孔隙水压力 工程弃渣 破坏形式
DOI10.13544/j.cnki.jeg.2017-436
Indexed ByCSCD
Language中文
CSCD IDCSCD:6405522
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/26195
Collection山地灾害与地表过程重点实验室
Corresponding Author刘兴荣
Affiliation1.甘肃省科学院地质自然灾害防治研究所;
2.中国科学院水利部成都山地灾害与环境研究所
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Corresponding Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
GB/T 7714
刘兴荣,崔鹏,王飞,等. 不同粒径级配条件下工程弃渣泥石流启动机理研究[J]. 工程地质学报,2018,26(6):1593-1599.
APA 刘兴荣,崔鹏,王飞,&董耀刚.(2018).不同粒径级配条件下工程弃渣泥石流启动机理研究.工程地质学报,26(6),1593-1599.
MLA 刘兴荣,et al."不同粒径级配条件下工程弃渣泥石流启动机理研究".工程地质学报 26.6(2018):1593-1599.
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