郑漯高速公路加宽工程新旧桥梁拼接设计施工技术研究

Study on Design and Construction Technology for Jointing New and Old Bridges in Zhengzhou─Luohe Highway Widening Project

为解决京珠国道主干线郑州至漯河段高速公路改扩建工程新旧桥梁结构拼接中的有关问题,考虑新旧结构的不均匀沉降及混凝土收缩、徐变差异等因素,参考和吸取了国内目前已进行加宽改建高速公路桥梁的经验教训,提出新旧桥梁在结构上采用上连下不连的设计与施工技术,研究成果对相关工程问题的解决具有重要的参考和借鉴价值。

In order to solve relevant problems in jointing reconstruction project on the trunk of Jingzhu National new and old bridges in Zhengzhou-Luohe highway Highway, differential settlement of new and old structures, differential settlement and shrinkage of concrete, experiences and lessons for widening and reconstructing highwy and other factors are taken into consideration, y bridges in the country are learnt and used as references, and design and construction technology to joint structures of the new bridge and old bridge on the top but not at the beneath is proposed. The research result can be used as key references and be applied to solve problems in relevant projects.