| 水石流梳子型切口坝拦砂性能试验研究 |
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| 引用本文： | 韩文兵,欧国强.水石流梳子型切口坝拦砂性能试验研究[J].水土保持研究,2004,11(3):286-288. |
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| 作者姓名： | 韩文兵 欧国强 |
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| 作者单位： | 中国科学院水利部成都山地灾害与环境研究所 成都 610041 |
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| 基金项目： | 中国科学院知识创新工程重要方向项目"南水北调西线工程山地灾害防治技术及环境影响研究 "(KZCX3-SW-323) |
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| 摘 要： | 通过室内水槽试验，对梳子型切口坝切口闭塞临界条件和拦砂性能进行探讨。初步得到:（1）切口坝有全闭塞、部分闭塞、不闭塞和随机闭塞4种闭塞类型。当切口坝的切口宽度b与水石流中最大颗粒粒径dmax之比b/dmax≤ 1.0时，切口全闭塞；b/dmax≥ 2时，切口不闭塞；1.0 <b/dmax<1.5时，切口一般是部分闭塞；1.5≤ b/dmax<2，出现随机闭塞；（2）在同一水槽坡度下，随着b/dmax的逐渐增大，切口坝泥砂拦截率逐渐下降；当b/dmax一定时，泥砂拦截率随坡度的降低而增大。
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| 关 键 词： | 水石流 梳子型切口坝 闭塞度 拦截率 |
| 文章编号： | 1005-3409(2004)03-0286-03 |
| 修稿时间： | 2003年12月1日 |
Experimental Study on Effect of Intercepting Sediment of Slit Dam |
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| HAN Wen-bing,OU Guo-qiang.Experimental Study on Effect of Intercepting Sediment of Slit Dam[J].Research of Soil and Water Conservation,2004,11(3):286-288. |
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| Authors: | HAN Wen-bing OU Guo-qiang |
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| Institution: | Chengdu Institute of Mountain Disaster and Environment, Chinese Academy of Sciences and Water Conservancy Ministry, Chengdu 610041, China |
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| Abstract: | By flume experiments indoors a series of model test which is to research critical closing conditions and effect of intercepting sediment on debris flow passing through slit dam are carried out.The experimental results show that there are four main kinds of closing conditions(total-closing,opening,part-closing,occasional-closing).The closing conditions of slit dam are closely link to the ratio b/dmax of distance between beam to the gravel’s maximum, and the gradient of flume.As the gradient of flume is the same,if increase b/dmax,the trap efficiency will decline.As the b/dmax is the same,if decrease the gradient of flume,the trap efficiency of slit dam will increase. |
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| Keywords: | debris flow slit dam extent of closing trap efficiency |
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