复杂环境下"H"形8层框架结构楼房同向爆破拆除

"H"形结构楼房由独立的3部分组成,各部分之间的距离仅0.4~0.7 m。为控制楼房爆破振动以及塌落振动对城市轨道交通线的影响,楼房采用向南同向定向爆破倒塌的方案进行拆除。为减少倒塌过程中3部分相互作用对楼体倒塌过程中的空中姿态以及倒塌后的爆堆形态的影响,确保楼房的爆破效果,采用人工预先拆除楼体间的阳台、合理选择各部分之间的爆破时差等综合措施。爆破后楼房按照要求倒塌,爆破达到了预期效果。

Directional Explosive Demolition of"H"Type Eight-layer Frame-structured Reinforced Concrete Building

The"H"type building was divided into 3 independent parts,the distance between each part was 40 70 cm.In order to reduce the influence caused by blasting and collapse vibration on urban rail transit,each part of the building was demolished by the same direction to south.In order to obtain a good blasting effect and to reduce the interaction among the 3 parts during the process of collapse and the influence of blasting muck pile,manual and mechanical methods were used to demolish the balcony of buildings.Meanwhile,the reasonable delay time was pro-posed.The monitoring data show that all of the buildings were collapsed as designed expectation in blasting.Finally, the blasting project caused no damage to the surrounding protection objects.