1971年徐州市建筑公司接受了睢宁县化肥厂和贾汪耐火器材厂工程,屋盖要求采用预应力构件。当地混凝土加工厂内台座周转使用十分紧张,构件运输力量更为薄弱,另外,构件长途运输损坏率也很高。因此决定在施工现场进行预应力构件预制。在现场进行预应力张拉就首先要解决台座问题。然而, In 1971 Xuzhou Construction Company accepted the project of Funing County Fertilizer Plant and Jiawang Refractory Equipment Factory. The roof requires the use of prestressed components. The turnover of the pedestal in the local concrete processing plant is very tight, and the transportation of the components is weaker. In addition, the damage rate of the long-distance transport of the components is also high. Therefore, it was decided to prefabricate prestressed components at the construction site. In the field of prestressed tension, we must first solve the pedestal problem. however,