钢筋混凝土筒形结构物拆除爆破问题的研究

STUDY OF DEMOLISHING TUBULAR STRUCTURE OF REINFORCED CONCRETE BY BLASTING

本文讨论钢筋混凝土筒形结构物拆除爆破切口参数设计问题。其爆破拆除过程可以分为三个阶段:切口施爆露出钢筋,露出的钢筋失稳破坏;承载面断裂。为满足后两者的要求,切口参数设计应进行钢筋失稳条件的计算和承载面断裂及宏观运动条件的计算,根据提出的力学模型,本文给出算例,与实际情况相吻合。

How to design the cutting parameters of demolishing tubular structure of reinforced concrete by blasting is discussed in the paper. The demolishing process can be divided into three stages: forming cutting slot to expose the reinforcing bars, destability damaging of the exposed bars and fracturing of bearing section. In order to meet the requirements of the last two stages the destability condition of the exposed reinforcing bars, the fracturing condition of bearing section and the macroscopically moving condition should be calculated in designing the cutting parameters. According to the mechanical model, the calculating example given in the paper is in accordance with practice.