(70+120+120+70)m大跨连续刚构桥施工监控

Construction Monitoring of(70+120+120+70)m Long-span Continuous Rigid Frame Bridge

为了适应施工装备及桥梁结构受力要求,大跨径连续刚构桥梁多采用悬臂现浇施工。现代桥梁建设多采用预应力混凝土结构,从而使得连续刚构桥在建设和运营过程中结构受力和变形情况十分复杂。为了使桥梁尽量接近设计状态、具有更好的成桥状态,保证施工质量和施工安全,确保合龙后主桥线形和内力与设计一致,有必要对桥梁施工过程进行监测。文中对东金沟松花江特大桥(70+120+120+70)m开展施工监控,保证桥梁的变形和应力满足设计要求。可为相关工程的建设提供参考。

In order to meet the requirements of construction equipment and bridge structure,long-span continuous rigid frame bridges are mostly constructed by cantilever cast-in-place construction.Modern bridge construction mostly adopts prestressed concrete structure,which makes the structure stress and deformation of continuous rigid frame bridge very complicated in the process of construction and operation.In order to make the finished bridge state of the bridge better conform to the design state,ensure the construction quality and construction safety,and ensure that the alignment and internal force of the main bridge after the closure are consistent with the design,it is necessary to monitor the construction process of the bridge.In this paper,the construction monitoring of Dongjingou Songhuajiangte Bridge(70+120+120+70)m is carried out to ensure the reliability and safety of the structure during the construction process,and to ensure that the deformation and stress of the bridge meet the design requirements.It can provide reference for the construction of rigid frame bridge and the development of monitoring.