以某长江公路大桥桥墩防护工程为工程背景,首先分析砂枕、袋装级配碎石和格宾网笼石的装袋的特点,分别提出对应的装袋装置及施工方法;其次分析砂枕、袋装级配碎石和格宾网笼石的水下定位精抛施工特点,研发出对应的水下到位自动脱钩装置及精抛施工方法;接着分析砂枕、袋装级配碎石和块石的水上粗抛施工特点,针对砂枕和袋装级配碎石研发出一种水上自动抛填装置及施工方法,针对块石提出挖机水上粗抛施工方法;再次从抛填时间选择、抛填材料质量控制、抛填过程中漂移距离控制、抛填范围和厚度控制等施工控制要点进行了阐述;最后总结了对该施工技术的应用前景,为其他类似工程提供参考。 Taking the bridge pier protection project of a Yangtze River Highway Bridge as the engineering background, firstly, the characteristics of bagging of sand pillows, sack grading gravel and geogrid cage are analyzed, and the corresponding bagging devices and construction methods are proposed respectively. Secondly, , Bagged graded gravel and geogrid geogrid fine positioning under the fine polishing construction features, developed a corresponding underwater automatic decoupling device and finishing construction method; followed by analysis of sand pillows, sack graded gravel and Rough stone throwing construction characteristics of the water for the sand pillow and bag graded gravel developed a water-based automatic throwing device and construction methods, proposed for digging block water rough throwing construction method; again from the throwing time to choose , The quality control of the filling material, the drift distance control during the filling and throwing process, the filling control and the thickness control. Finally, the application foreground of the construction technology is summarized, providing reference for other similar projects.