基于实测数据的青岛硬岩地铁隧道爆破施工振动影响范围研究

Research on Impact Range of Blasting Construction Vibration in Qingdao Subway Tunnel with Hard Rock Based on Measured Data

为科学解决爆破施工带来的周边建筑物安全问题,基于青岛地铁4号线横通道爆破施工的现场实测振动数据,拟合了青岛地质条件下的萨道夫斯基经验公式的岩性系数;根据周边建筑物现状确定了周边建筑物的安全振速控制标准,进而获得了爆破方案的爆破振动安全距离,避免了爆破施工对周边建筑造成的损坏。为减少施工期间的扰民纠纷,结合回归得到的经验公式,确定了该施工方案的爆破振动影响范围即爆破施工前需要开展调查的范围,为后续青岛地铁爆破施工的顺利开展提供了重要的参考依据。

In order to solve scientifically the safety problems of surrounding buildings caused by blasting construc-tion,based on measured vibration data of blasting construction of cross passage in Qingdao Metro Line 4 and under Qingdao geological conditions,the lithology factors were fitted by Sadovsky Formula.According to the present sta-tions of surrounding buildings,their control standards of safety vibration velocity and the safety distance of blasting scheme were obtained which can avoid damage to surrounding buildings.Combined with the regressive formula,the range of blasting vibration impact of the blasting plan,the range of the investigation before the blasting,was determined to reduce disturbing residents during construction.The research provides important reference for the subse-quent blasting construction in Qingdao Metro.