安哥拉某倒锥壳水塔高空现浇水箱施工技术

Construction Technology of High-altitude Cast-in-situ Water Tank of Some Inverted Cone Water Tower in Angola

安哥拉国内的倒锥壳水塔水箱多采用预制提升工艺安装,渗漏情况比较严重。为了改善不足,参照水箱提升工艺,经过计算不同工况荷载,设计出可整体提升的悬挑斜桁架支撑体系,从而实现了某倒锥壳水塔水箱高空现浇施工。详细介绍了该项目的桁架系统设计、桁架提升准备、桁架整体提升、桁架固定、高空现浇、桁架拆除等施工步骤。通过在实际工程中应用悬挑斜桁架支撑体系下高空现浇倒锥壳水塔施工技术,达到提高施工安全性、质量易控制、提高可操作性的目标。

The water tank used to be prefabricated and lifted to inverted cone water tower in Angola,which lead to the bad integrity and water leakage.In order to improve the inadequate,this paper works out cantilevered oblique truss platform which can lift overall and pour concrete of water tank at high altitude by calculation of different working load conditions according to tank lifting technology.Then the paper particularly introduce design,hoisting preparation,entire hoisting,fixing,casting at high altitude and dismantling of the truss system.By practical application of cast-in-situ water tank of some inverted cone water tower with truss support system,the goals of improving security,controlling quality and improving maneuverability are reached.