高速铁路大跨径三线矮塔斜拉桥水中支架现浇与悬臂浇筑组合快速施工比选技术研究

Research on the Comparison and Selection Technology of Cast-in-place and Cantilever Cast-in-place Combination of Water Support in High-speed Railway Long Span Three-line Low Tower Cable-stayed Bridge

杭衢高铁常山江特大桥主桥跨越常山江采用(117+240+117)米三线矮塔斜拉桥,对不同方案进行比选,提出支架现浇与悬臂浇筑相结合的施工方法。主梁0#-9#段先用支架现浇,剩余悬臂段再用挂篮法对称浇筑,同步建设主塔和边跨现浇段施工方案,对施工工期压力突出的卡控工程有很大的借鉴作用,从而使施工工期节约了6个月,避免了吊篮施工在河道涨水期受到的不良影响。

(117+240+117)m three-wire low tower cable-stayed bridge is used for the main bridge of Changshanjiang Large Bridge of Hangzhou-Quzhou-Quzhou-high-speed railway.The construction method of supporting castin and cantilever castin is proposed by comparing different schemes.The main beam section 0#-9#is cast-in-place with bracket first,and the remaining cantilever section is cast-in-place with hanging basket method.The construction scheme of the main tower and side span cast-in-place section is constructed synchronously,which has a great reference effect on the stick control engineering with prominent pressure during the construction period,thus saving the construction period of 6 months and avoiding the adverse influence of hanging basket construction in the flood period of the river.