某工程二期过流围堰坡面抗冲加固分析研究

Anti-scour Reinforcement of the Second Stage Overflow Cofferdam Slope in a Navigation Junction Project

某航运枢纽工程二期过水围堰在汛期可能处于挡水、充水、过流等多种情况,水流流态复杂,流量变化大,对围堰安全极为不利。为确保围堰工程安全度汛,其护面结构的选择直接关系到围堰的安全运行。围堰坡面的抗冲设计,首先选取最不利工况,再结合工程布置选择合理的经验公式计算出防护范围,采取合理的防护工程措施。防护范围必须结合工程现场地形地貌进行调整细化,以永临结合为原则,保证建筑物安全,达到经济实用的目的。

In a navigation junction project,the second stage overflow cofferdam could be operated in various conditions in the flood season such as water retaining,water filling and water overflow.The flow state is thus complex and the over flow varies greatly,which is seriously unfavorable to the safety of the cofferdam.To ensure the safety of the cofferdam during the flood season,selection of the protection structure is crucial.For the anti-scour design of the cofferdam slope,firstly we should select the most unfavorable working condition.Then,the reasonable empirical formula should be selected in combination with the project layout to calculate the protection range and take rational protection measures.The protection range must be adjusted and refined considering the actual topographic features of the project.Permanent and temporary measures should be combined to ensure the safety of the structure on the premise of economy and practicality.