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,对构件进行蒸气养护,这种方法, 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 northwestern region and the winter construction period lasts for five to six months. What methods can be used to guarantee the normal production of outdoor terraces in the winter? Larger prefabrication factories often make pedestals in troughs and cover with steel insulation cover. Vapor curing of components, this method,