一、概述目前,予应力砼空心板的使用量日益增大,由于台座自身的先天性缺陷,使构件的质量不尽人意。常见的砼台座有两种,一种是原始的普通素砼台座,现已少见;另一种则是较先进的先张自锚予应力砼台座。该种台座较素砼台座表面质量较好,使用之初无裂缝,可以不设或少设伸缩缝,但由于砼中的予应力钢筋的耐久性差,给产品生产带来了极其不利的影响,所以,该种台座尚存在一定缺陷。 I. Overview At present, the use of prestressed concrete hollow slab increasing day by day, due to its own congenital defects pedestal, so that the quality of components is not satisfactory. There are two common concrete pedestal, one is the original plain concrete pedestal, is now rare; the other is a more advanced self-anchored prestressed concrete pedestal. This kind of pedestal is better than the concrete pedestal surface quality, no crack at the beginning of use, no or less set expansion joints, but due to the durability of prestressed concrete in concrete is poor, to the production of products has brought extremely adverse effects, Therefore, there are still some defects of this kind of pedestal.