【摘要】 公路隧道钻爆法施工对临近建构筑物造成的安全影响不容忽视。以隧道下穿既有水库及溢洪道水库设施施工为例,通过对坝体,围岩的振动监测,分析爆破地震波的振动特征,并采取爆破规范控制标准对其振动安全进行分析。结果表明控制掏槽孔装药量,合理的掏槽布置和装药结构是决定隧道开挖爆破的关键,爆破引起的坝体振动速度小于坝体允许振动速度,对溢洪道的影响较大,因此采用台阶法施工可以控制对坝体影响,但对近距离水库设施须采取相关措施控制爆破。更多还原

【Abstract】 The safety impact of drilling and blasting construction of highway tunnels on adjacent structures cannot be ignored. Taking the construction of existing reservoirs and spillway reservoirs under tunnels as an example, the vibration characteristics of blasting seismic waves are analyzed by monitoring the vibration of dam body and surrounding rock, and the safety of blasting vibration is analyzed by adopting the control standards of blasting codes. The results show that the key to the blasting of tunnel excavation is to control the charge quantity of cut holes, rational cut layout and charge structure. The vibration velocity of dam body caused by blasting is less than the allowable vibration velocity of dam body, which has a greater impact on spillway. Therefore, the step method can control the influence of dam body, but it is necessary for the close reservoir facilities. Relevant measures should be taken to control blasting.更多还原