不同粒径级配条件下工程弃渣泥石流启动机理研究
STUDY ON THE THRESHOLD MOTION MECHANISM OF ENGINEERING SLAG DEBRIS FLOW WITH DIFFERENT PARTICLE SIZE GRADING CONDITIONS
查看参考文献15篇
|
文摘
|
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。 |
|
其他语种文摘
|
Clear 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. |
|
来源
|
工程地质学报
,2018,26(6):1593-1599 【核心库】
|
|
DOI
|
10.13544/j.cnki.jeg.2017-436
|
|
关键词
|
清水流量
;
孔隙水压力
;
工程弃渣
;
破坏形式
|
|
地址
|
1.
甘肃省科学院,地质自然灾害防治研究所, 兰州, 730000
2.
中国科学院水利部成都山地灾害与环境研究所, 成都, 610041
|
|
语种
|
中文 |
|
文献类型
|
研究性论文 |
|
ISSN
|
1004-9665 |
|
学科
|
地质学 |
|
基金
|
甘肃省自然科学基金
;
国家科技支撑计划项目
;
“西部之光”访问学者(2016a)
;
甘肃省科学院应用研究与开发项目
;
甘肃省科学院与中国科学院合作项目
|
|
文献收藏号
|
CSCD:6405522
|
参考文献 共
15
共1页
|
|
1.
Bagnold R A. Experiments on a gravity - free dispersion of large solid spheres in a Newtonian fluid under hear.
Proceedings of the Royal Society of London,Series A,1954,225:49-63
|
被引
85
次
|
|
|
|
|
2.
Iverson R M. Flow of variably fluidized granular masses across three-dimensional terrain coulomb mixture theory.
Journal of Geophysical Research Solid Earth,2001,106(B1):537-552
|
被引
73
次
|
|
|
|
|
3.
Middleton G V. Experimental studies related to problem of flysch sedimentation.
Flysch sedimentation in North America,1970:253-272
|
被引
2
次
|
|
|
|
|
4.
Savage S B. Particle size segregation in in - clined chute flow of dry cohensionless granular solids.
Journal of Fluid Mechanics,1988,189:311-335
|
被引
22
次
|
|
|
|
|
5.
Wang G H. Factors affecting rainfall-induced flow-slides in laboratory flume tests.
Geotechnique,2001,51(7):587-599
|
被引
2
次
|
|
|
|
|
6.
崔鹏. 泥石流起动条件及机理的实验研究.
科学通报,1991,36(21):1650-1652
|
被引
30
次
|
|
|
|
|
7.
冯大阔. 常刚度条件下粗粒土与结构接触面三维力学特性试验研究.
岩土工程学报,2009,31(10):1571-1577
|
被引
22
次
|
|
|
|
|
8.
高冰. 泥石流启动过程中水土作用机制的宏细观分析.
岩石力学与工程学报,2011,30(12):2567-2573
|
被引
22
次
|
|
|
|
|
9.
刘菲. 工程弃渣型坡面泥石流形成过程试验.
重庆交通大学学报(自然科学版),2011,30(增刊1):519-529
|
被引
1
次
|
|
|
|
|
10.
唐川. 汶川震区北川9．24暴雨泥石流特征研究.
工程地质学报,2008,16(6):751-758
|
被引
104
次
|
|
|
|
|
11.
许冲. 2013年7月22日岷县漳县M_S6.6级地震滑坡编录与空间分布规律分析.
工程地质学报,2013,21(5):736-749
|
被引
20
次
|
|
|
|
|
12.
杨顺. 恒定渗流作用下泥石流起动过程冲刷试验分析.
岩土力学,2014,35(12):3489-3495
|
被引
5
次
|
|
|
|
|
13.
张文. 基于HEC-HMS模型的不同雨型下泥石流清水流量特征探讨.
工程地质学报,2017,25(4):1073-1082
|
被引
3
次
|
|
|
|
|
14.
周键. 不同颗粒组分下泥石流离心机模型试验研究.
岩土工程学报,2015,37(12):2167-2174
|
被引
1
次
|
|
|
|
|
15.
周公旦. 泥石流颗粒物质分选机理和效应.
四川大学学报(工程科学版),2013,45(1):28-36
|
被引
15
次
|
|
|
|
|
了解气象卫星更多信息，请访问