砖烟囱桩基承台抗弯承载力设计

The Design of Bending-resistance Bearing Capacity of Pile Table

当遇地基软弱时砖烟囱基础往往采用桩基,若根据需要采用(多排桩则由于)外环桩数多于内环桩数,将会在径向形成不平衡弯矩,该不平衡弯矩将引起沿烟囱筒壁下的环向弯矩。由于现行国家标准《烟囱设计规范(》GB50051-2002)无相关设计方法,遂对上述两种情况下的抗弯承载力设计进行了研究,推导出了砖烟囱桩基础平台正截面抗弯承载力计算公式。

Piles are always used when the foundation is weak. But when many pilasters are used, the number of outer-circle pilasters will be more than those of the inner-circle pilasters, then, it will endanger an unbalance moment in diameter, which would cause the circular moment along the chimney wall. Since there is no related design method in 《Code for design of chimney》 GB50051-2002,this article discuss the bending-resistance capacity under the above situation.