我队负责施工的某机务段架修库75吨预应力鱼腹式吊车梁,采用后张自锚预应力工艺。这种方法不使用加工复杂的工作锚,具有安全、可靠、经济等优点,但其工艺比先张法和一般后张法复杂一些,尤其是鱼腹式吊车梁的曲线预应力钢筋,在孔道成型、钢筋冷拉和张拉工艺方面都有更多的要求。我队原是以线路 Our team is responsible for the construction of a mechanized repair shop 75 tons of prestressed fish abdomen crane beam, using post-Zhang self-anchor prestressed process. This method does not use complex working anchor, it has the advantages of safety, reliability and economy, but the process is more complex than the first method and the general post-tension method, especially the curved prestressed steel bar of fish-belted crane beam. Forming, steel cold-drawing and stretching processes have more requirements. My team was originally a line