摘要
结合某复杂环境下高层框架楼定向爆破拆除,分析了确保爆破成功和安全的几条重要技术要点。①后排支撑柱的起爆延时不应过大,最后排柱与次后排柱的起爆延时宜在150m s左右;②倒塌场地的平顺和倾斜方向对爆堆影响不可忽视,在复杂环境下可利用倒塌场地倾斜方向来控制爆堆塌落范围;③爆堆侧向坍塌范围主要取决于侧边砖墙垮塌散落程度;④飞石防护材料应有足够的强度和韧性阻挡飞石抛散,又要有良好的透气性,使爆炸气体可自由扩散;⑤楼房后排下坐可能是首次触地,其触地振动较大。
Combined with directional blasting demolishment for high flame building under complex circumstance, several important technical points which guarantee successful and safe blasting demolition are analyzed in this paper ：①The delay period of back row support pillar should not oversized,the back row column blasting should delay about 150ms after blasting of forestall column of the back row;②The influence of collapse site evenness and incline direction to muck-pile can not be neglected ,under the complex circumstance ,the incline direction of collapse site can be used to control the bound of muck-pile ;③The lateral bound of muck-pile collapse mainly depends on the falling and scattering degree of lateral side brick wall;④The protective materials of fly-stone should have not only enough intensity and toughness to prevent the fly-stone throwing, but also the good permeability to let the explosion gas diffuse freely;⑤The hock ward collapse of back row pillar may touch ground for the first time,the collapse vibration is relatively strong.
出处
《爆破器材》
CAS
2006年第6期30-32,共3页
Explosive Materials
关键词
定向爆破
拆除
框架结构
触地振动
directional blasting,demolish,flame structure,collapse vibration
