[1]吴鑫,马东涛,杨敏,等.粘性泥石流坝后回淤比降的实验[J].山地学报,2013,(05):594.
　WU Xin,MA Dongtao,YANG Min.Experiment on Siltation Gradient of Viscous Debris Flow behind Gravity Checkdam[J].Mountain Research,2013,(05):594.
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粘性泥石流坝后回淤比降的实验()
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《山地学报》[ISSN:1008-2186/CN:51-1516]

卷:
期数:
2013年05期
页码:
594
栏目:
山地灾害
出版日期:
2013-01-01

文章信息/Info

Title:
Experiment on Siltation Gradient of Viscous Debris Flow behind Gravity Checkdam
作者:
吴鑫;马东涛;杨敏;
1．中国科学院水利部成都山地灾害与环境研究所，四川 成都 610041；
2.中国科学院大学，北京 100392；
3.中国科学院山地灾害与地表过程重点实验室，四川 成都 610041
Author(s):
WU Xin; MA Dongtao; YANG Min
1.Institute of Mountain Hazards and Environment，Chinese Academy of Sciences & Ministry of Water Conservancy，Chengdu 610041，China；
2.University of Chinese Academy of Sciences，Beijing 100039，China ； 3. Key Laboratory of Mountain Hazards and Earth Surface Processes，Chinese Academy of Sciences，Chengdu 610041，China
关键词:
粘性泥石流; 拦挡坝; 重度; 沟床纵坡; 回淤比降; 回淤比降比值
Keywords:
viscous debris flow; checkdam; gradient of gully bed; density; siltation gradient; the gradient ratio parameter
分类号:
P642.3
文献标志码:
A
摘要:
拦挡坝坝后回淤比降是泥石流防治工程设计中的一个重要参数。本实验选取粘性泥石流,开展了沟床纵比降为9.5%～26.2%共8组和重度17～22 kN/m3共6组的坝后回淤比降的模拟实验。实验发现:1.在沟床纵坡为9.5%、12.1%、14.4%、16.7%、18.9%、21.3%、23.8%和26.2%时,其回淤比降分别为8.08%、9.8%、11.38%、12.69%、14.55%、16.61%、18.56%和20.96%;2.回淤比降比值在0.76至0.85间,平均0.80;3.回淤比降随沟槽纵比降的增大而增大,二者呈线性正相关,相关系数在0.95以上;回淤比降随重度的增大,总体呈缓慢增大的趋...
Abstract:
The siltation gradient is an important parameter for designing gravity checkdam of debris flow，which is not only influencing the judgment of the height，the distance between dams，the deposit capacity of debris flow reservoir，but also the mitigation benefit and engineering life of checkdams. The siltation gradient is affected by the gradient of gully bed，the density，flow velocity and discharge，and grain compositions of debris flow et al factors，among which the gradient of gully bed and the density are most important than others. By using the viscous debris flow in the laboratory，simulation experiments are carried out under 8 groups of the gradient of gully bed and 6 groups of densities. After the experiment finished，the influences of gradient of gully bed and the density of debris flow to siltation back checkdam，and the relationship between them are studied and analyzed. The following results are achieved through the experiment: 1under the same density，the siltation gradient is 808%，98%，1138%，1269%，1455%，1661%，1856 % and 2096% respectively while the gradient is 95%，121%，144%，167%，189%，213%，238% and 262%；2The gradient ratio parameter value K is between 076 and 085，the mean value is 080，which can be used as designing data；3The siltation gradient is increasing with the increase of the gradient of gully bed，and there is a linear relationship between them. The gradient of back siltation is increased slowly with the increase of density of debris flow，they have a quadratic relationship each other；4 the relationship of the siltation gradient i with gradient of gully bed i0 and the density of debris flow γ is: i = 06014×γ0.0526×i0.94700，which can be used for calculating i；5under the same dam height，the siltation gradient viscous debris flow is relative greater than thin debris flow.

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备注/Memo

备注/Memo:
收稿日期(Received date)：2013-04-18；改回日期(Accepted) : 2013-06-09。
基金项目（Foundation item）：地质灾害防治与地质灾害保护国家重点实验室开放基金资助项目（GZ2007-15）；中铁二院工程集团有限责任公司科研项目“成兰铁路桥梁工程泥石流防治技术研究”。[Supported by Opening fund of State Key Laboratory of Geohazard Prevention and Geoenvironment Protection Chengdu University of Technology（GZ2007-15）；Control Technique on Debris Flow of Bridge Construction along Chengdu-Lanzhou Railway，China Railway Eryuan Engineering Group Co.Ltd.]
作者简介（Biography）：吴鑫，（1985-），男，四川眉山人，在读硕士研究生，研究方向为地质灾害防灾减灾工程和岩土工程。[Wu Xin(1985-)，male，major in geohazards prevention and geo-engineering.]E-mail:29520791@qq.com *通信作者(Corresponding Author):马东涛，（1965-），男，陕西武功人，博士，教授，主要从事地质灾害基础理论和防灾减灾工程研究。[Ma Dongtao，(1965-)，male，prof. & Dr.，major in geohazards prevention theory and engineering.]E-mail: dtma@imde.ac.cn
更新日期/Last Update: 1900-01-01