本文叙述一种应用于先张法的预应力混凝土构件的操作技巧,它通过“控制放松预应力”的方法,使预应力值能够沿着构件的纵向变化,符合弯矩包络图。方法由浇筑和放松交替的操作组成,所放松的应力是根据预先计算好的在分段构件端部所需的减少应力。 This paper describes a technique of prestressed concrete members applied to pretensioning method. It uses the method of “controlling relaxed prestress” to make the prestress value change along the longitudinal direction of the member and accord with the bending moment envelope. The method consists of alternating pouring and relaxation operations, with stress relaxation based on pre-calculated stress reduction at the ends of the segmented members.