摘要
提出护底加糙的壅水工程措施以解决通航建筑物水深不足。通过对其论证分析发现,加糙效果与加糙材料粒径直接相关,同时粒径的选取应综合考虑自身稳定性、水位壅高效果、比降和局部流速变化,避免造成新的碍航问题。在此基础上,针对三峡建库后葛洲坝船闸可能出现的水深不足情况,通过理论分析以及数值模拟,比较了不同加糙方案的壅水效果。该措施还具有设置或拆卸的灵活性,工程风险小等优点。
The principle of increasing roughness of channel bed is used to maintain the water depth of channel for ensuring the operation of navigation building. The effectiveness of this measure is closely related to the diameter of the roughness material to be used. The stability of material, increase of water depth, variations of hydraulic gradient and velocity distribution in navigation channel after increasing of roughness must be comprehensively studied to prevent from harmful influences to navigation. This engineering measure is applied to solve the problem of insufficient water depth of navigation channel probably occurred to the shiplock of the Gezhouba Project when the Three Gorges Project is put into operation.
出处
《水利学报》
EI
CSCD
北大核心
2005年第2期141-146,154,共7页
Journal of Hydraulic Engineering
基金
国家重点基础研究发展规划项目(2003CB415200)
关键词
通航建筑物口门
水深不足
护底加糙
壅高水位
navigation pass
water depth deficiency
increasing roughness
increase of water depth
