超长混凝土工程无缝施工案例分析

Research on the Seamless Construction Case of Super-Long Concrete Structure

结合工程实例,分析了超长混凝土结构产生裂缝的原因并提出了解决问题的施工方案,介绍了无缝施工中采用无粘结预应力解决裂缝的关键施工方法及注意事项,其中,重点介绍了实现超长结构无缝施工的重要环节———预应力后浇带的处理措施.工程实践表明此项技术取得了较好的效果,具有很高的推广价值.

Combining with engineering cases, the reasons caused cracks on over-long concrete structure are analyzed and the construction scheme is proposed. The paper presents the key methods and guidelines of unbonded prestressed concrete construction for the elimination of cracks in the seamless construction. In which the treatment of prestressed late poured band is introduced emphatically. Engineering practice confirmed that this technique is worth to be extensively spread.