大跨度自锚式拱桥异形帽梁支架设计及施工控制  

DESIGN AND CONSTRUCTION CONTROL OF THE SPECIAL-SHAPED CAP SUPPORT FOR THE CAST-IN-PLACE LONG SPAN SELF-ANCHORED ARCH BRIDGE

作　　者：胡娟[1,2] 宋一凡[1] 孙晓义[3] 

机构地区：[1]长安大学公路学院,西安710064 [2]陕西铁路工程职业技术学院,陕西渭南714000 [3]中铁一局集团桥梁工程有限公司,重庆401121

出　　处：《工业建筑》2014年第6期85-89,共5页Industrial Construction

基　　金：校级自然科学基金项目(2011-10)

摘　　要：在大跨径自锚式转体拱桥跨越既有线施工时,如何使现浇主拱圈得到临时结构的可靠支承是施工的关键技术问题。以主拱圈施工异形帽梁现浇支架为研究对象,采用SAP 2000建立支架的有限元模型,分析支架在施工过程中的受力及变形特性。研究表明,该拱桥现浇支架的应力及变形均能满足设计要求,并经受住实际应用的考验,同时证明异形帽梁支架的设计及施工是安全合理的。In the constructing a long-span self-anchored swivel arch bridge which crossing the existing line , how to obtain reliable cast-in-place main arch special-shaped cap support the temporary structure is a key technical problem in the construction.Therefore, taking the construction of the main arch cast-in-situ frame as the research object, the finite element SAP 2000 was used to build support model , analysed the support stress and deformation characteristics in the process of construction .The results showed that stress and deformation of the arch bridge cast-in-place bracket met the standard requirements , and had withstood the test of real bridge , and that the design and construction of special-shaped cap support is safe and reasonable .

关 键 词：拱桥 异形帽梁 支架 施工控制 

分 类 号：U445.3[建筑科学—桥梁与隧道工程]