由于钢材来源和预应力张拉技术等因素,我国目前预应力筋多数采用冷拉Ⅱ～Ⅳ级粗钢筋,很不经济。工程实践表明,采用高强钢丝代替上述钢筋,具有强度高、用钢量少、无需对焊冷拉、工序简单、成本低等优点。因此,高强钢丝预应力技术的开发应用在我国有比较广阔的前景。高强钢丝束镦头锚具一般由锚杯、螺帽和锚板组成。张拉端采用锚杯,借助于工具式螺杆,就可用普通拉伸机将钢丝束张拉至控制应力后用螺帽固定。固定端只需一块简单的锚板即可。这种锚具组合简单、加工容易、成本低廉。工程实践表明,这种锚具可 Due to factors such as steel source and prestressing tension technology, most of the prestressed tendons in China currently adopt cold drawn grade II-IV coarse steel bars, which is not economical. Engineering practice shows that the use of high-strength steel wire instead of the above steel has the advantages of high strength, low steel consumption, no need for cold welding, simple process, and low cost. Therefore, the development and application of prestressed high-strength steel wire technology has a broad prospect in China. High-strength wire bundle anchors are generally composed of anchor cups, nuts and anchor plates. Tensioning end using anchor cup, with the aid of a tool-type screw, can be used ordinary tensioning machine to tension the steel wire to control stress and then use a nut to fix. The fixed end requires only a simple anchor plate. This combination of anchors is simple, easy to process, and inexpensive. Engineering practice shows that this anchorage can be