下穿宁芜货线隧道南京地铁隧道爆破的振动控制

Blasting Vibration Control of Nanjing Subway Tunnel Wear Under Both NingWu Cargo Line Tunnel

介绍在建地铁宁高城轨隧道下穿既有宁芜货线隧道的爆破开挖振动控制,其左线最小净距仅约1.7 m,右线最小净距4.0 m,隧道下穿高铁北联络道匝道桥,爆破环境复杂。为使保护目标不受破坏,采用了优化炮孔延期时间的控制、及时调整段药量及减震空孔参数等减震措施,使宁芜货线隧道以及地表的联络匝道桥等建筑位置处的地震波控制在安全范围内,获得了很好的工程效果。

Introduced under the subway Ninggao tunnel under high city rail wear both NingWu cargo line tunnel excavation blasting vibration control, blasting environment complex that the minimum clearance of the left line of only about 1.7 m, the right line of minimum interval of 4.0 m and tunnel under wearhigh--speed rail north contact way ramp bridge. To protect the target from damage, adopted measures of optimization of blast hole delay time of control, adjust period of dosage and damping empty hole parameters, etc, which made NingWu cargo line contact ramp bridge tunnel and ground seismic control of location of building within the scope of the security, obtained good engineering results.