取消先张法长线台座伸缩缝,利用预应力钢筋混凝土做台面是台座的重大改革。前年我厂自行设计和施工了3000m~2预应力钢筋混凝土台座。台座长104.8米,共六条。经过实践考验,情况良好。去年又新建了3000m~2,并己投产使用。现介绍如下。一、设计依据按习惯做法,非预应力台座总是先做 It is a major reform of the pedestal to cancel the expansion joints of the Zhangjiao long-line pedestal and use the prestressed reinforced concrete as the countertop. In the previous year, our factory designed and built a 3000m~2 prestressed reinforced concrete pedestal. The pedestal is 104.8 meters long with a total of six. After a trial of practice, the situation is good. Last year, a new 3000m~2 was built and put into production. The introduction is as follows. First, the design basis according to the customary practice, non-prestressed pedestal always do first