无产阶级文化大革命以来,预应力技术在宁夏得到了推广和普及,各混凝土预制厂(场)普遍采用了露天台座长线法生产预应力中、小构件的施工工艺。但是,宁夏地处西北地区,冬季施工期长达五、六个月,用什么方法保证露天台座在冬季正常生产呢?较大的预制厂,常将台座作成槽式,盖上钢保温罩,对构件进行蒸汽养护,这种方法,设备一次投资大,用钢量大,场内还需有起重设备。我公司第四施工队三结合技革小组于 Since the proletarian cultural revolution, the prestressed technology has been popularized and popularized in Ningxia, and the prefabricated middle and small components are produced by the long-line benches at each concrete prefabricated factory (field). However, Ningxia is located in the northwest region, and the winter construction period lasts for five or six months. What methods are used to guarantee the normal production of outdoor pedestals in the winter? Larger prefabrication factories often make pedestals into troughs and cover with steel insulation covers. The steam curing of the components is required. This method requires a large investment in the equipment and a large amount of steel. There must also be lifting equipment in the yard. The fourth construction team of our company combined three teams of technics