黄坡大桥是国道 32 5线吴川市西段改造的控制工程 ,主桥为梁高 1 .3m、跨径为 4 0 m的拉压双作用预应力混凝土简支 I形梁。介绍了先压法预压钢筋的特殊工艺 Huangpo Bridge is a control project for the reconstruction of the west section of Wuchuan City on National Highway 325. The main bridge is a tension-compression double-acting prestressed concrete simply supported I-beam with a beam height of 1.3m and a span of 40m. Introduced the special pre-press method of preloading steel