黏粒含量对泥石流源区砾石土体强度影响的实验研究
Experimental study of the influence of the clay content on the gravel soil mass from the upstream area of a debris flow
查看参考文献17篇
|
文摘
|
泥石流源区砾石土的黏粒颗粒含量对砾石土孔隙水压力和强度的影响是泥石流形成机理中的重要问题之一.采用室内静三轴实验研究云南东川蒋家沟支沟大凹子沟源区的砾石土体强度、孔隙水压力、湿陷性与黏粒颗粒含量的关系,发现黏粒的质量分数在3.75%~ 7.50%范围内的砾石土试样湿陷性较大;黏粒的质量分数为5%左右的砾石土湿陷性最大;黏粒的质量分数在3.75%~7.50%范围内砾石土试样在不固结不排水剪切过程中孔压上升较高;黏粒质量分数在12.5%的砾石土试样在固结排水剪切过程中孔压上升较高;黏粒的质量分数为5%的砾石土强度最低,在相同条件下最容易被破坏.结合实验结果与泥石流启动机理分析,认为中等黏粒含量(质量分数为3.75%~7.50%)的砾石土在相同降雨和坡度条件下,最易启动形成泥石流. |
|
其他语种文摘
|
The clay content of the gravel soil from the upstream area of a debris flow has significant influence on the pore pressure and shearing strength.This is a problem that has to be solved in studying the debris flow initiation mechanism.Based on the three-axial experiment,this paper studies the relationship among the shearing strength,pore pressure,collapsibility and clay content of the sample from Jiangjia ravine of Dongchuan in Yunnan of China.The experiment indicates that(1) when the clay content is 3.75%~7.50%,the collapsibility of the sample is greater and when it is 5%,that of the sample is the maximum;(2)in the UU experiment,the pore water pressure of the samples with 3.75%~7.50%clay content has the greater increase,and in the CD experiment,the pore water pressure of the sample with 12.5%clay content has the greater increase;(3)the gravel soil with 5%clay content is the easiest to demolish;(4)under the same conditions of rainfall and gradient,the gravel soil with 3.75%~7.50%clay content is most likely to motivate a large-scale devastative debris flow. |
|
来源
|
成都理工大学学报. 自然科学版
,2011,38(5):522-528 【扩展库】
|
|
关键词
|
泥石流
;
砾石土
;
黏粒含量
;
最大剪应力
;
孔隙水压力
|
|
地址
|
中国科学院水利部成都山地灾害与环境研究所, 中国科学院山地灾害与地表过程重点实验室, 成都, 610041
|
|
语种
|
中文 |
|
文献类型
|
研究性论文 |
|
ISSN
|
1671-9727 |
|
学科
|
建筑科学 |
|
文献收藏号
|
CSCD:4335973
|
参考文献 共
17
共1页
|
|
1.
唐邦兴.
中国泥石流,2000:192-212
|
被引
4
次
|
|
|
|
|
2.
Pérez F L. Matrix granulometry of catastrophic debris flows(December 1999)in central coastal Venezuela.
Catena,2001,45:163-183
|
被引
1
次
|
|
|
|
|
3.
Cannon S H. Debris-flow reponse of southern California watersheds burned by fire.
Debris-FlowHazards Mitigation:Mechanics,Prediction, and Assessment.Proceedings of the Second InternationalConference on Debris-Flow Hazards Mitigation,Taipei,2002:45-52
|
被引
1
次
|
|
|
|
|
4.
Scott K V. Origins,behavior,and sedimentology of lahars and lahar-runout flows in the Toutle-Cowlitzriver system.
U.S.Geological Survey Professional Paper,Denver,1988:51-52
|
被引
2
次
|
|
|
|
|
5.
吴积善.
云南蒋家沟泥石流观测与研究,1990
|
被引
1
次
|
|
|
|
|
6.
陈宁生. 中尼公路泥石流的分布规律与基本特征.
中国地质灾害与防治学报,2002,13(1):44-48
|
被引
1
次
|
|
|
|
|
7.
Pierson T C. Dominant particle support mechanismsin debris flows at Mt.Thmas,New Zealand, and implications for flow mobility.
Sedimentology,1981,28:49-60
|
被引
11
次
|
|
|
|
|
8.
Ellen S D. Mobilization of debris flowsfrom soul slips,San Francisco Bay region,CaliforniaDebris Flows,Avalanches:Process,Recognition, and Mitigation.Geological Society of AmericaReviews in Engineering Geology.
Geological Societyof American Boulder,1987:31-40
|
被引
1
次
|
|
|
|
|
9.
Iverson R M. Two-phase debris-flow across 3-D terrain:Modelpredictions and experimental tests.
Debris-flowHazards Mitigation:Mechanics,Prediction,and Assessment.Proceedings of the Second InternationalConference on Debris-flow Hazards Mitigation,Taipei,2002:521-529
|
被引
1
次
|
|
|
|
|
10.
Takahashi T. Debris flow.
IAHR-AIRH Monograph,1991:1-165
|
被引
1
次
|
|
|
|
|
11.
高橋保. 土石流の發生流動機構.
土と基礎,1978,26(6):45-50
|
被引
3
次
|
|
|
|
|
12.
Cui P. Studies on condition and mechanism of debrisflow initiation by means of experiment.
Chinese Science Bulletin,1992,37(9):759-763
|
被引
32
次
|
|
|
|
|
13.
崔鹏. 泥石流起动的突变学特征.
自然灾害学,1993,2(1):53-61
|
被引
2
次
|
|
|
|
|
14.
陈宁生. 四川丹巴“2003.07.11泥石流”灾害考察报告.
山地学报,2003,21(5):632
|
被引
5
次
|
|
|
|
|
15.
陈宁生. 粘土颗粒含量对泥石流启动的影响作用分析.
土工测试新技术第25届全国土工测试学术研讨会论文集,2008:216-221
|
被引
1
次
|
|
|
|
|
16.
Chen N S. The processesand mechanism of failure and debris flow initiationfor gravel soil with different clay content.
Geomorphology,2010,121(3/4):222-230
|
被引
28
次
|
|
|
|
|
17.
Sassa K. Mechanism of landslidetriggered debris flows:Liquefaction phenomena dueto the undrained loading of torrent deposits.
Debris-flow Hazards and Related Phenomena,Berlin,2005:81-104
|
被引
1
次
|
|
|
|
|
了解气象卫星更多信息，请访问