预应力电杆基本上可分为两种型式:一种为单杆或称整段杆;另一种为组装杆也称分段杆。由于杆型不同,预应力张拉夹具也有所不同。在钢筋张拉时,不仅要控制伸长值,同时还要控制应力值,采用固定垫块的方法很难满足上述要求。为此,我厂设计了脱卸式夹具,经使用证明,效果良好。 1.夹具构造脱卸式夹具由张拉头A、B及锥形销子三部分组成。它既可组合成一个整体,又可拆成 Prestressed electric poles can be basically divided into two types: one is a single rod or a whole rod; the other is an assembled rod also called a sectional rod. Because of the different types of rods, prestressed tensioning fixtures are also different. When tensioning a steel bar, it is not only necessary to control the elongation value, but also to control the stress value. It is difficult to meet the above requirements by using a fixed pad block method. To this end, our factory designed a detachable fixture, proved to be effective after use. 1. Fixture structure The detachable jig is composed of three parts, A, B, and taper pins. It can be combined into a whole and can be disassembled