台儿庄泵站肘形流道施工技术

台儿庄泵站设计采用的肘形进水、直管式出水流道,为典型空间曲面结构,模板尺寸大,体型复杂,施工技术复杂,质量控制难度大。在施工过程中,以流道内模制作为核心控制环节,采用自行设计与制作大型异型木模板,全站仪空间精确定位,千斤顶微调精确就位和模板加固等工序,控制肘形流道空间尺寸和表面平整度关键环节的施工质量;模板采用宝丽板贴面明显提高了混凝土表面的光洁度,显著降低了流道糙率;同时采取综合措施控制混凝土温度,加强混凝土养护和温度观测,有效防止温度裂缝产生。经模型试验表明,台儿庄泵站肘形流道具有良好流态和均匀的出口流场,可达到设计预期目的。

Construction Technology of Elbow Passageway in Tai'erzhuang Pump Station

The elbow passageway intake and straight tube outlet are used in Tai'erzhuang pump station. It is a typical space curved surface structure with the characteristics of big scale template,complex shape and volume,complicated construction technology,and difficult quality control. In order to control the construction quality, inside formwork was taken as key control link; sandalwood formwork was designed and fabricated; Electronic Total Station was used to determine position; and the jack was used to take accurate place for inside formwork. The inside formwork was strengthened,and the space size and surface smooth level degree are controlled. The purpose of Bao-Li Paper boards mould was used to increase the smooth level degree, while roughness of passage was decrease. The comprehensive technical including concrete curing and temperature observation was used to prevent concrete temperature crack validly. It is indicated that design of elbow passageway of Tai'erzhuang pump station was achieved design purpose for its super flow.