城市复杂环境条件下控制爆破技术

以重庆轻轨三号线江北机场站为例,介绍了城市复杂环境条件下浅埋隧道、大基坑开挖控制爆破施工方法.在爆破设计中,根据爆破点周围不同的外部环境,采取了不同的爆破参数,并采用了一系列综合减震措施,开挖爆破对隧道及基坑周围建筑物的影响降低到很小程度.监测结果表明,爆破震动控制较好,周边建筑物没有受到影响.

Control Demolition Technique Under Complicated Urban Condition

This paper is based on the construction of JiangBei airport station of the Chongqing No.3 Light Railway,the control demolition applied to shallow covered and large foundation pit excavation under urban complicated condition is introduced.In the demolition designing,using different demolition parameters according to the different external conditions with adopting a series of comprehensive shock absorption steps,the influence of excavation demolition on the outside construction is decreased to the least degree.The result of monitoring shows that the demolition vibration is well controlled and the surrounding constructions have not been disturbed.