浅谈水闸牛腿的悬臂施工方法计算及分析

Elementary Discussion on Calculation and Analysis of Cantilever Construction of Lock Bracket

悬臂施工时占用的空间较小,利于节省施工费用,降低工程造价,便于施工作业。闸墩上凸出的牛腿主要用来支撑弧形闸门,牛腿的施工一般是水闸工程中的一个十分关键的阶段,其拉筋计算也是个难题,计算的方法也较为复杂。该文主要基于某水库排淤泄洪闸工程,原定施工方案为在枯水期搭设钢管脚手架进行牛腿部位的施工,由于工程的设计变更,新的方案拟定在牛腿的下方预埋工字钢,从而保证在汛期闸室牛腿能继续施工,并且可以安全度汛。为此,针对该工程在设计变更后,对该排淤泄洪闸上的牛腿施工进行施工计算分析,可供同行参考。

The cantilever construction occupies the smaller space, which is benefit for economizing the construction funds and reducing the engineering construction cost, and is convenient for the construction. The bracket projected on the lock pier is mainly used for supporting the radial gate. The bracket construction is generally very important stage in the course of lock construction. Its reinforcement calculation is also difficult and the calculation method is also more complex. Based on a reservoir sediment discharge and flood drainage lock project, the steel tube scaffold was erected in the original construction scheme to construct the bracket during the low water period, but it is proposed to embed H-section steel at the lower of bracket in the new scheme because of the engineering design modification so as to guarantee the continuous construction of bracket for the gate chamber during the flood period and the safety of flood season. Therefore, the article analyzes and calculates the construction of the brackets on this sediment discharge and flood drainage lock, which can be referred for the similar projects.