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对桥梁施加体外预应力的加固方法 ,从结构上 ,可改善桥梁的受力性能 ,并恢复和提高桥梁的强度、刚度和耐久性 ;就外观而言 ,能防止和控制桥体的裂缝生成 ,避免或阻止钢筋受蚀 ,使桥体线形达到设计要求 ,桥面平整度和坡度等技术指标有所保障和提高。此方法曾在四座大桥的桥梁加固上得以实施及应用 ,工程结束后达到了预期的设计要求和最节约的经济投入 ,真正体现到本工程加固方法性价比的优越性。
The method of applying external prestressing force to the bridge can improve the mechanical performance of the bridge and restore and improve the strength, rigidity and durability of the bridge. In terms of appearance, it can prevent and control the crack propagation in the bridge, Avoid or stop the steel corrosion, so that the bridge line to meet the design requirements of the bridge deck roughness and slope and other technical indicators have been protected and improved. This method has been implemented and applied to the bridge reinforcement of four bridges. After the project is completed, the expected design requirements and the most economical investment have been achieved, which truly reflects the superiority of the cost-effective reinforcement method of this project.