建筑物细部定向爆破拆除技术浅析

Briefly Analysis of Directional Explosive Demolition of Building Detail

在建筑物拆除爆破工程中,常常采用爆破切口的前后高差、不同区域延期起爆等技术措施确保建筑物整体定向倒塌,但是当后排立柱离保护物很近或是单排(棵)立柱定向爆破时对定向的精度要求更高,这时还必须在重点部位立柱内再次采用细部定向爆破拆除技术,即只进行局部爆破以形成定向铰支,并预开隔离缝,严格控制立柱在爆破后产生后坐危害,通过工程实践,爆破效果很好,其施工技术和参数选取可供同类工程借鉴。

In the explosive demolition of buildings,the difference of blast cut before and after blasting and the delay between different regions and other technical measures are used to ensure the overall direction collapse of the building,but when the rear column is very closed to the protected objects or the orientation of blast single-row（single） column are highly required,then the directional explosive demolition technique must also be used in key positions of the column,and strictly controlling the backcollapse of the column after blasting.Through engineering practice,the blast results can provide the reference for similar projects.