复杂环境下多排立柱框架楼房爆破拆除技术

摘要

针对待拆腾飞大厦为环境复杂的多排立柱框架型楼房的情况,采用了控制爆破技术.综合考虑楼房结构和周边环境,选择了合理的前、后排立柱起爆时间,利用时间差控制楼房倒塌方向距离;根据后支座铰链前移技术,使2排立柱作为后支座铰链,增加铰链极限承载力,严格控制楼房后坐.实例表明,爆破效果良好,楼房破碎较好,爆堆高6 .2m,爆破倒塌距离28m,后排柱后坐未超过2 m,为类似楼房爆破拆除工程提供了借鉴.%Due to the multi row column frame building of Tengfei edifice in complex environment ,the controlled blasting technology is used .Considering the building structure and the surrounding environment , selecting reasonable detonation time of the before and after column ,using the time difference to control collapse direction and distance ;according to the rear supporting hinge forward technology ,the two row of columns as a bearing hinge ,increasing the limit bearing capacity of hinge to control the building backward collapse strictly .The example building is broken well ,the muckpile is 6 .2 m high , the blasting collapse distance is 28 m ,and the after column backward is not more than 2 m .It is provide a refevence for blasting demolition engineering of similar buildings .