Abstract: Reinforced concrete confining method based on dead load adjusting of spandrel structure is expatiated in the paper；besides the engineering measures of dead load adjusting are stated．Through the comparislon of the survey of the arch eLLrve variety,the strengthening practice achieves tangible results．The effectiveness shows that the strengthening method is applieable and reliable and it could be a successful practice for repairing and strengthening the similar bridges．

Key words: stone arch bridge, strengthening, reduction of load, high pressure grouting , reinforced concrete confining

摘要： 结合工程实践，通过原理分析，恒载调整内容、幅度和调整工序的介绍，提出了基于拱上恒载调整的石拱桥加固改造技术．加固前后桥梁实测拱轴线变化及加固前后的理论分析比较结果表明，该加固改造技术实用、可靠，可望为我国同类桥梁的加固改造起到积极的借鉴作用．

关键词: 石拱桥, 加固改造, 减载, 高压灌浆, 钢筋砼套箍