某沉井式地下停车库底板配筋设计

Study on Reinforcement Design of Bottom Slab of an Open Caisson Underground Garage

利用沉井结构建造地下停车库以解决老旧城区停车难问题成为趋势.以某市沉井式地下停车库建造工程为例,对圆形底板的配筋方式及裂缝产生的原因进行了理论分析,利用极限平衡法对圆形沉井底板进行配筋设计计算,并对底板进行抗裂性验算.结果表明:此方法在保证工程质量的前提下,能有效减少底板钢筋用量,可为今后同类沉井结构及圆形板施工提供参考.

With the development of underground space, using underground caisson structure to build underground parking garage to solve the problem of parking in old urban areas becomes a trend. Taking the construction of open caisson underground parking garage in a city as an example in this paper, a theoretical analysis ofthe reinforcement mode and the causes of the cracks in the circular floor is made, and the limit equilibrium method is used to calculate the reinforcement of the floor of the circular caisson. It is believed that this method can effectively reduce the amount of the steel bar of the floor under the premise of guaranteeing the quality of the project. And the crack resistance of the floor is checked. The method proposed in this paper is practicable and canprovide reference for similar caisson structure and circular slab construction in the future.