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1970年我公司承建天津市冶金局750初轧厂工程时,准备在这项工程上推广新结构,当时认为钢绞线强度高,单根长度长,优点较多,决定采用高强度钢绞线为预应力混凝土构件配筋。一开始就遇到怎样使用钢绞线,采用那种锚具的问题?若采用 JM-12锚具,虽是已经配套成功的,但加工困难;
In 1970, when our company undertook the construction of the 750th rolling mill project of the Tianjin Metallurgical Bureau, it was prepared to promote the new structure in this project. At that time, it was considered that the strength of the strand was high, the length of a single strand was long, and there were many advantages. It was decided to use a high-strength steel strand. Reinforced prestressed concrete members. At the beginning, we encountered the problem of how to use steel strands, and what kind of anchorages were used. If JM-12 anchors were used, although they were successfully matched, they were difficult to process.