隧道爆破振动试验研究

Experimental Study on Blasting Vibration of Tunnel

由于某隧道从水库斜下方穿越且存在断裂破碎带,为确保隧道施工不会引起F3断裂破碎带孔隙变大、同时保证隧道爆破施工不危及水库大坝的安全运营,必须进行爆破振动试验及监测分析。通过对水库坝体及隧道洞内进行爆破振动监测与试验,数据结果表明,大坝坝体两测点监测的爆破振动速度均小于爆破振动控制预警标准2.5cm/s,表明隧道洞内掌子面爆破未对水库大坝坝体造成不利影响,隧道洞内拱腰位置水平切向振速较大。并通过爆破振动监测,了解地下工程爆破振动规律。

The tunnel in the paper traverses the reservoir and there is a fracture zone.In order to ensure that the tunnel construction will not cause the F3 fracture pore to become larger,and the tunnel blasting construction does not endanger the safe operation of the reservoir and dam,the blasting vibration test and monitoring analysis must be carried out.Through the monitoring and testing of the blasting vibration in the dam and tunnel,the data results show that the blasting vibration speed of the two measuring points of the dam is less than that of the blasting vibration control early warning standard 2.5 cm/s.It is also shown that there is no adverse effect on the dam body of the reservoir,and the horizontal tangential velocity of the position of the tunnel arch waist is larger.Through the monitoring of blasting vibration,the law of blasting vibration of underground engineering is found out.