高耸筒体建筑物爆破拆除设计中的运动学分析

Kinematics′ Analysis on the Design of Blasting Demolish of the Lofty Rotunda

将钢筋混凝土筒体倾倒简化为刚体模型 ,在推导其倾倒历时计算公式的基础上 ,分析了其倾倒历时与爆破参数之间的关系 ,指出应根据爆破缺口长度进行倾倒历时计算 ;比较了倾倒历时的理论值与实际观察值之间的差异 ,对倾倒历时公式进行了加系数的修正 ;进而比较不同倾角条件下历时与整个倾倒历时的关系 ,指出传统筒体爆破拆除起爆时差过大的错误 ;对钢筋混凝土筒体建筑物双向折叠倾倒进行运动学分析 ,比较了上下段筒体不同长度比值条件下的倾倒历时 ,提出筒体双向折叠倾倒上下段筒体长度之比应大于

A rotunda is predigested as a rigid body model. On the basis of deducing the falling duration′s calculation formula, the relation between falling duration and blasting parameters needs to be analyzed, and then the tenet that the calculation formula need depend on the length of blasting gap has been indicated. The difference between the academic falling duration and the actual measure has been compared, and the calculation formula was added with a coefficient. The relation between the falling duration and different falling angles are being compared, and the traditional theory′s fault about blasting time space has been pointed out. After these, the rotunda bi-directional falling′s kinematics circs has been construe, and the falling duration are compared under difference length ration between the upside and the downside of the rotunda. The results show that, the length ration must more than one.