[1]杨海龙,樊晓一*,赵运会,等.偏转角度对滑坡-碎屑流运动影响的模型试验[J].山地学报,2017,(03):316-322.[doi:10.16089/j.cnki.1008-2786.000227]
　YANG Hailong,FAN Xiaoyi,ZHAO Yunhui,et al.Model Tests on Influence of Deflection Angleon the Movement of Landslide-Debris Avalanches[J].Mountain Research,2017,(03):316-322.[doi:10.16089/j.cnki.1008-2786.000227]
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偏转角度对滑坡-碎屑流运动影响的模型试验()
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《山地学报》[ISSN:1008-2186/CN:51-1516]

卷:
期数:
2017年03期
页码:
316-322
栏目:
山地灾害
出版日期:
2017-05-30

文章信息/Info

Title:
Model Tests on Influence of Deflection Angleon the Movement of Landslide-Debris Avalanches
文章编号:
1008-2786-(2017)3-316-07
作者:
杨海龙; 樊晓一*; 赵运会; 王海瓜
西南科技大学 土木工程与建筑学院,四川 绵阳 621010
Author(s):
YANG Hailong; FAN Xiaoyi; ZHAO Yunhui; WANG Haigua
School of civil engineering and architecture, Southwest University of Science and Technology, Mianyang Sichuan 621010, China
关键词:
滑坡-碎屑流;  偏转角度;  运动参数;  模型试验
Keywords:
Landslide-debris avalanches;  deflection angle;  movement parameter;  model test
分类号:
P642.22
DOI:
10.16089/j.cnki.1008-2786.000227
文献标志码:
A
摘要:
本文基于模型试验,对不同偏转角度(θ)作用下的碎屑流运动堆积特征进行初步研究。试验结果表明,在偏转作用下,碎屑流的运动经历了加速、持速和减速三个阶段。 碎屑流的前缘速度在持速阶段表现出明显的波动性,偏转角度越大,碎屑流前缘速度波的动性越显著; 但偏转角度对碎屑流的运动时间的影响并不显著。对碎屑流受偏转作用后的水平运动距离进行分析表明较小的偏转角度更有利于碎屑流的运动。偏转作用下碎屑流的堆积过程表现出“多次叠加堆积”特征,偏转角度越大“多次叠加堆积”的现象越明显。同时,碎屑流的堆积厚度分布也明显受控于偏转角度的影响。横断面上,堆积厚度沿受冲击碰撞一侧向对侧减小,两侧堆积厚度的差异随偏转角度的增大呈抛物线变化,θ=20°时最大。纵断面上,碎屑流在坡脚附近的堆积厚度随偏转角度的增大而增大。
Abstract:
The deflection angle(θ)were considered as an influence factor to study the movement and deposit characteristics of landslide-debris avalanches based on model tests.The test results showed the movement of landslide-debris avalanches included three stages: acceleration, constant-speed and deceleration.The front velocity of landslide-debris avalanches showed obvious fluctuation at stage of constant-speed.The larger the deflection angle was, the more obvious fluctuation of front velocity was.However, the deflection angle had no significant influence on the movement time of landslide-debris avalanches.Smaller deflection angle was more favorable to the movement of landslide-debris avalanches through statistical analysis.The depositing process of debris avalanches under the action of deflection showed the characteristics of multiple depositing, and the phenomenon was more obvious with the increase of deflection angle.Meanwhile,the stacked thickness distribution of debris avalanches was also controlled by the deflection angle.In the cross section,the stacked thickness decreased along the impact side to the other side, and the difference in accumulation thickness between the two sides was greatest at θ=20°.On the vertical section, the accumulation thickness of debris avalanches near the slope toe increased with the deflection angle.

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备注/Memo

备注/Memo:
收稿日期(Received date):2016-06-15; 改回日期(Accepted date):2016-11-22。
基金项目(Foundation item):国家自然科学基金项目(41272297); 四川省科技厅项目(2014JY0121); 四川省教育厅重点项目(14ZA0095)。[National Natural Science Foundation of China(41272297); Science and Technology Department of Sichuan Province(2014JY0121)and Education Department of Sichuan Province(14ZA0095).]
作者简介(Biography):杨海龙(1992-),男,硕士研究生,研究方向为地质灾害。[Yang Hailong(1992-),male,M.Sc.candidate,research on geological disaster.]E-mail:2402635703@qq.com
*通讯作者(Corresponding author):樊晓一(1974-),男,博士,教授,主要从事岩土工程、地质灾害教学科研工作。[Fan Xiaoyi(1974-),male,professor,Ph.D,research on geological engineering and geological hazard.]E-mail:xyfan1003@126.com
更新日期/Last Update: 2017-05-30