维持通航建筑物口门水深的护底加糙措施研究

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。

Water depth maintenance of navigation pass by means of increasing roughness of channel bed

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.