向家草坝节制闸牛腿拆除后弧形闸门的安装技术

Radial Gate Installation Technology of the Control Gates in Xiangjiacao Dam while Re-casting the Concrete Brackets Simultaneously

在向家草坝节制闸的加固中,为适应9扇弧形钢闸门及支铰的更换,原牛腿混凝土需凿除,且必须在一个枯水季节完成,提出了先安装门叶再安装支铰的施工方法。通过精心研究施工、安装方法及工艺,对门叶安装进行受力分析,并严格控制质量与安全管理等,既缩短了工期,又保证了工程质量,是一次成功的探索。

During the reinforcement work of the control gates in Xiangjiacao Dam,the old concrete brackets need to be removed and re-casted to install new radial gates and supporting hinges.Considering that the work must be completed in one dry season,an installation scheme of the gates that installing the gate leafs first and then supporting hinges is proposed and implemented.The construction and installation technologies including the quality and safety management measures are summarized.A stress analysis of the gate leaf during the installation is also carried out.It shows that the proposed installation technology is successful,which not only guarantees the construction schedule,but also ensures the installation quality.