论述了型钢预弯复合梁的基本原理、优缺点和应用场合 ,说明了预弯复合梁桥的建造过程 ,阐明了型钢预弯复合梁在制造与施工过程中对拱度的控制、横向稳定的控制、残余应力的消除以及预弯力的控制等关键技术 ,并利用预弯复合梁正式预弯制作前的预弯试验证明了控制这些参数的重要性和如何控制这些参数。在实际预弯制作过程中的实测结果表明 ,所选定的控制参数是正确的 ,控制方法是可靠的 The basic principle, advantages, disadvantages and applications of the precast composite beam are discussed. The construction process of the precast composite beam bridge is illustrated. The control of the crown during the manufacture and construction of the precast composite beam is expounded. The transverse stability Control, residual stress elimination and pre-bending control and other key technologies, and the use of pre-bending composite beam pre-bending pre-bending pre-production test proved the importance of controlling these parameters and how to control these parameters. The actual measured results in the process of actual pre-bending show that the selected control parameters are correct and the control method is reliable