海域环境大跨径斜拉桥中跨合龙技术研究
摘要：宁波舟山港主通道(鱼山石化疏港公路)公路工程主桥含2段中跨合龙段，合龙之前根据现场实际测量的合龙口宽度对合龙段钢箱梁进行配切、打磨，随后对2段合龙段钢箱梁进行同步起吊，在合龙段嵌入合龙口后迅速采用马板对合龙段进行临时锁定以抵消温度应力，并在温度上升前解除索塔区钢箱梁临时锚固以完成体系转换。对中跨合龙段施工流程进行详细介绍并强调注意事项及突出特点。
关键词：桥梁工程斜拉桥钢箱梁中跨合龙临时锁定体系转换
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[2] 阙水杰，岳青，严和仲.厦漳跨海大桥钢箱梁斜拉桥中、边跨合龙施工技术[J].世界桥梁，2013,41(4):21-25.
[3] 林朝庆.斜拉桥中跨超长合龙段施工技术[J].广东土木与建筑，2015(8):44-45.
[4] 江震.宁波中兴大桥钢箱梁主跨合龙技术[J].城市道桥与防洪，2019(10):132-134,18.
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Research on Closing Technology of Middle Span of Long Span Cable-stayed Bridge in Marine Enviroment
Abstract: The main bridge of Ningbo Zhoushan port main channel highway project, Yushan Petrochemical Shugang Highway, includes 2 mid-span closing sections. Before the closure, the steel box girder of the closure section was cut and polished according to the width of the closure opening measured on the site. Subsequently, the two steel box girder of the closure section were lifted synchronously. After the closure section was inserted into the final closure, a erection board was used to temporarily lock the closure section to offset the temperature stress. The temporary anchorage of steel box girder in cable tower area is released before temperature rising for system transformation. This paper gives a detailed description of the construction process of the mid-span closing section and emphasizes the precautions and outstanding features.
Keywords: bridges; cable stayed bridges; steel box girder; mid span closure; temporary lock; system transformation
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