【摘要】 通过现场监测与分析导流隧洞爆破开挖振动情况,得到了不同围岩级别的爆破振动波速衰减方程,根据爆破振动速度允许标准求出了导流隧洞围岩和新浇衬砌混凝土爆破安全控制参数;分析了振动速度超过安全控制标准的原因并及时调整爆破参数,从而有效控制了爆破振动破坏效应;根据现场实际情况,提出了几种后期隧道爆破施工中控制爆破振动的措施并取得了较好的效果。更多还原

【Abstract】 The attenuation equations of blasting waves for different surrounding rock ranks are proposed by on-site monitoring and analysis of blasting vibration in diversion tunnel excavation.On the basis of allowable blasting vibration,the blasting safety control parameters of surrounding rock and new cast-in-situ concrete are obtained.At the same time,the reason of vibration velocities exceeded the standard are analyzed and related excavation blasting parameters are adjusted in time.Thus,the damage effect of blasting vibration is controlled effectively.Finally,several measures for reducing the blasting vibration are proposed on the basis of on-site situation,and it gains good effect.更多还原