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(03):286-288.
水石流梳子型切口坝拦砂性能试验研究
- Title:
- Experimental Study on Effect of Intercepting Sediment of Slit Dam
- Keywords:
- debris flow; slit dam; extent of closing; trap efficiency
- 分类号:
- P642.23
- 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。
- 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.
参考文献/References:
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[3] 李德基.透水型拦挡坝在泥石流防治中的应用[J].中国地质灾害与防治学报, 1997, 8(4):32-36.
[4] 柴钫武, 连惠邦.梳子坝开口宽度之设计模式[A].海峡两岸灾害与环境保育研究[C].成都:四川科学技术出版社, 1998.210-214.
[5] 游勇, 等.泥石流梁式格栅坝拦砂性能实验研究[J].水土保持学报, 2001, 15(1):113-115.
相似文献/References:
[1]吕晶,高甲荣,胡封兵.北京双紧梢沟泥石流堆积物的特征及演变[J].水土保持研究,2010,17(01):140.
LÜ,Jing,GAO Jia-rong,et al.Characteristics and Development of the Debris Flow Fan in Shuangjinshao Gully, Beijing[J].Research of Soil and Water Conservation,2010,17(03):140.
备注/Memo
收稿日期:2003-12-1;
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）
作者简介:韩文兵（1980- ），男，安徽潜山人，主要从事山地灾害防治工程技术研究.