中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
束流型拦砂坝溢流口及其关键参数确定

文献类型:期刊论文

作者陈华勇1,2; 柳金峰1,2; 赵万玉1,2
刊名水科学进展
出版日期2016
卷号27期号:5页码:1-10
关键词束流结构 拦砂坝 溢流口 流态 坝后冲刷
ISSN号1001-6791
其他题名Experimental investigation on the lateral contraction spillway and its key parameters determination
通讯作者陈华勇
中文摘要

In order to modify the spillway structure of a check dam and specify the geometry parameters of the spillway,the debris-flow pattern,scour depth,and energy dissipation were discussed under the conditions of different bottom surfaces and lateral contraction ratios based on physical modeling experiments. According to the buried depth design criteria for check-dam foundations and critical equilibrium for nonviscous particles under water,the rational value of the lateral contraction ratio was also discussed. The results indicated that the scour hole with deep scour depth was
near the dam foundation when the spillway surface was a plate or curved surface with a large inclined angle. When a curved surface with a horizontal outlet was considered,not only was the scour depth decreased to some extent,but the distance between the plunging point and the dam toe was also enhanced. Generally,upon increasing the lateral contraction ratio,the energy dissipation rate increased due to the stronger interaction between the debris flows and erodible bed downstream if the debris-flow scales and spillway curvature were fixed. When the lateral contraction ratio was
in the range 0. 2—0. 6,the scour depth behind the check dam satisfied the engineering design. Meanwhile,the distance between the plunging point and the dam toe was reasonable. This study can provide some reference points for the design of debris-flow mitigation in the engineering of check dams.

英文摘要

In order to modify the spillway structure of a check dam and specify the geometry parameters of the spillway, the debris-flow pattern,scour depth,and energy dissipation were discussed under the conditions of different bottom surfaces and lateral contraction ratios based on physical modeling experiments. According to the buried depth design criteria for check-dam foundations and critical equilibrium for nonviscous particles under water,the rational value of the lateral contraction ratio was also discussed. The results indicated that the scour hole with deep scour depth was
near the dam foundation when the spillway surface was a plate or curved surface with a large inclined angle. When a curved surface with a horizontal outlet was considered,not only was the scour depth decreased to some extent,but the distance between the plunging point and the dam toe was also enhanced. Generally,upon increasing the lateral contraction ratio,the energy dissipation rate increased due to the stronger interaction between the debris flows and erodible bed downstream if the debris-flow scales and spillway curvature were fixed. When the lateral contraction ratio was
in the range 0. 2—0. 6,the scour depth behind the check dam satisfied the engineering design. Meanwhile,the distance between the plunging point and the dam toe was reasonable. This study can provide some reference points for the design of debris-flow mitigation in the engineering of check dams.

学科主题P642.23
收录类别EI ; CSCD ; 北大中文核心
语种中文
CSCD记录号CSCD:5843511
源URL[http://ir.imde.ac.cn/handle/131551/18009]  
专题成都山地灾害与环境研究所_山地灾害与地表过程重点实验室
作者单位1.中国科学院山地灾害与地表过程重点实验室
2.中国科学院水利部成都山地灾害与环境研究所
推荐引用方式
GB/T 7714
陈华勇,柳金峰,赵万玉. 束流型拦砂坝溢流口及其关键参数确定[J]. 水科学进展,2016,27(5):1-10.
APA 陈华勇,柳金峰,&赵万玉.(2016).束流型拦砂坝溢流口及其关键参数确定.水科学进展,27(5),1-10.
MLA 陈华勇,et al."束流型拦砂坝溢流口及其关键参数确定".水科学进展 27.5(2016):1-10.

入库方式: OAI收割

来源:成都山地灾害与环境研究所

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