大跨度整体现浇钢混叠合梁桥面板关键技术研究

Study on Key Technology of Long-span Cast-in-situ Steel-concrete Composite Beam Deck

以某跨度为(56.45+115.3+44.5)m的钢-混凝土叠合梁桥为工程实例,针对该桥跨高速铁路施工,受天窗点的影响,混凝土无法一次性浇筑完成等技术难点进行分析,确定了先浇筑边跨桥面板,再浇筑中跨跨中区段桥面板,最后浇筑墩顶桥面板的分段浇筑顺序,以确保钢梁叠合时面板与钢梁之间连接的质量,并对钢混叠合连续梁桥面叠合关键技术进行了具体介绍和总结。

Taking a span(56.45+115.3+44.5) m of steel-concrete composite beam bridge as an engineering case and aiming at the construction of this bridge spanning an expressway,the article analyzes the technical difficulties that the concrete is hard to pour once under the influence of skylight points.The pouring sequence by sections is determined to firstly pour the bridge deck of side span,then to pour the deck of the middle section of the middle span and finally to pour the deck at the top of pier so as to ensure the connecting quality between the bridge deck and steel beam during the composting of steel beam,and introduces and sums up the key technologies of steel-concrete composite continuous beam deck in detail.