【摘要】 为了合理确定跨海桥梁非通航孔桥的跨径及其结构形式,以宁波舟山港主通道工程岑港至双合段的跨海桥梁为背景,从工程建设条件、施工方案、施工组织、技术经济性等因素对60 m,70 m预应力混凝土箱梁、85 m组合梁和110 m钢箱梁方案的上下部结构进行比较分析,结果认为在水深满足起重船吊装的条件下,上部结构采用分幅整孔预制、整孔吊装的70 m预应力混凝土箱梁,基础采用钢管桩、现浇混凝土整体承台、预制墩身比较符合工程实际情况,同时也是最经济的工程方案。更多还原

【Abstract】 In order to reasonably determine the span and structural style of non-navigable bridge of sea-crossing bridge,the sea-crossing bridge from Cengang to Shuanghe,the main channel project of Zhoushan Port,Ningbo is taken as background,and a comparative analysis is conducted on the upper and lower structure of 60 m and 70 m prestressed concrete box girder,85 m composite beam and 110 m steel box girder from respects including engineering construction conditions, construction scheme, construction organization,technological economic efficiency,etc. The results tell that it is more practical in terms of the actual conditions of the project if the super-structure adopts 70 m prestressed concrete box girder that is prefabricated in a framing and full-span manner and hoisted in a full-span manner,and the foundation adopts steel pipe pile,cast-in-place concrete cushion cap and prefabricated pier body under the circumstance that the depth of water satisfies the hoisting conditions of crane ship. This is also the most economical engineering proposal.更多还原