在武汉地铁二号线的宝通寺站的地下过街通道的修建工程中需要实行爆破挖掘施工,因为作业点上方是城市主干道,故而车流量大,且周边的建筑密集,所以采用爆破法挖掘施工要求更严格。在爆破施工的过程在通过对周边古建筑、地下管线、商业区等重点保护的区域的振动数据检测,优化爆破方案,最后发现使用“台阶法一抬炮法”相融合的小幅度进尺,循环掘进,多个断面依次开挖的方案可以降低爆破施工的危险性;一个断面起爆分为三个区,利用“先中间、后两边”的爆破顺序,一个方面爆破的振动降低到70~80%,在另一方面控制隧道轮廓面的效果也非常显著。 Blasting excavation is required in the construction of the underground passage at Baotongsi Station of Wuhan Metro Line 2. Because the traffic is above the main arterial road, traffic flow is large and the surrounding buildings are dense. Therefore, blasting excavation Construction requirements more stringent. During blasting construction, vibration data of the key protected areas such as the ancient buildings in the periphery, underground pipelines and commercial areas were tested to optimize the blasting program. Finally, the small footage footage using the “step-and-blast method” , Excavation cycle, a number of sections in turn excavation program can reduce the risk of blasting construction; a section detonation is divided into three zones, the use of “first middle, rear two sides,” the order of blasting, one aspect of blasting vibration reduced to 70 ~ 80%, on the other hand the effect of controlling the profile of the tunnel is also very significant.