桥梁水中墩承台预制施工方法探讨

Discussion on Method for Prefabricating Cushion Cap of Bridge Pier in Water

研究目的:我国大江大河众多,市政、公路、铁路建设中,广泛使用桥梁水中墩施工技术。在国内桥梁施工中,承台一般采用明挖基坑、一般支护基坑、筑岛围堰、混凝土桩围堰、钢板桩围堰、钢管桩围堰、单壁钢围堰、双壁钢围堰、薄壁混凝土围堰、吊箱围堰、套箱围堰、地下连续墙围堰等就地现浇施工方法。通过探索桥梁水中墩承台施工新技术,在安全、质量、进度得到保证的情况下,减低工程成本,促进桥梁建设技术进步。研究结论:桥梁水中墩承台高位预制施工技术在国外已有实例,在国内未见工程实例。通过研究分析,承台高位预制施工技术具有可行性、较好的通用性,施工方法技术先进、安全可靠、具有良好的经济性。通过进一步的优化、试验,承台高位预制施工方法具有良好的应用、推广前景。

Research purposes ： As there are lots of big rivers in China, the construction technology of the bridge pier in water has been widely used for the municipal projects, highway projects and railway projects. In construction of bridges in China, the open excavation foundation pit, ordinary -support foundation pit, building artificial island and surrounding wall, and building surrounding wall with concrete pile, steel plate pile, steel tube pile, single wall steel, double wall steel, thin wall concrete, boxed cofferdam, pouring jacket and continuous wall are used for the cushion cap. The discussion is made on the construction technology of the cushion cap of the bridge pier in water to cut the construction cost and promote the progress of the construction technology of bridge on the premise of ensuring the construction safety, quality and process.Research conclusions：The high -order prefabricating technology for the bridge pier in water has been used in foreign country, but not be used in China. From the analysis and research it is concluded the high - order prefabricating technology for the bridge pier in water is available with the features of good universal property, advanced technology, safety, reliability and and good economical efficiency. After further optimization and tests, the high - order prefabricating technology for the bridge pier in water can be widely used.