救灾物资储备库建设项目钢管混凝土组合结构泵送混凝土及节点施工技术

Pumping Concrete and Joint Construction Technology of Concrete-filled Steel Tube Composite Structure for Disaster Relief Materials Storage Construction Project

本文以哈尔滨市救灾物资储备库建设项目为例,探究了钢管混凝土组合结构的泵送混凝土施工技术及节点连接技术。在泵送混凝土施工中,除了要严控混凝土的质量验收外,对于钢管下段混凝土采取了顶升法浇筑;对于上段混凝土采取了分层浇筑。在保证钢管混凝土组合结构稳定性、完整性的基础上,取得了加快施工效率、节约施工成本的效果。在节点连接中,对于不同直径钢管需要加装锥形管作为连接构件;对于同径钢管采用直接焊接方式连接,为提高库房结构稳定与使用安全创造了有利条件。

In this paper,taking the disaster relief materials storage construction project of Harbin City as an example,the pumped concrete construction technology and joint connection technology of concrete-filled steel tube composite structure are explored.In the construction of pumped concrete,in addition to the strict acceptance of concrete quality,the jacking method is adopted for the concrete in the lower section of the steel pipe.The concrete in the upper section is cast in layers.On the basis of ensuring the stability and integrity of concrete-filled steel tube composite structure,the effect of speeding up construction efficiency and saving construction cost is achieved.In the joint connection,it is necessary to install conical tubes as connecting components for steel pipes of different diameters.The direct welding method is used to connect the same diameter steel pipe,which creates favorable conditions for improving the stability of the warehouse structure and the safety of use.