月亮山隧道爆破减震试验研究

发布时间：2018-04-15 19:58

本文选题：隧道掘进 + 电子雷管　；参考：《爆破》2016年02期

【摘要】：黄石月亮山隧道是典型的城市浅埋大跨度隧道。为了控制隧道开挖中的爆破震动效应,减少下穿隧道对居民区、房屋建筑结构的影响,在隧道掏槽爆破过程中,采取电子雷管逐孔孔间微差起爆技术进行爆破作业。考虑到微差时间对爆破震动和爆破效果的影响,分别选取5 ms、6 ms、7 ms、8 ms和10 ms逐孔微差时间进行试验,得出不同孔间微差时间下爆破效果,进而优选方案。结合震速、震动频率和爆破效果的优选结果表明:选取孔间微差时间为7 ms时,测点最大震动速度小于1.5 cm/s,控制在震动安全标准之内;最低震动频率高于30 Hz,与房屋结构发生共振几率较小;且岩石破碎效果较好。
[Abstract]:Huangshi Liangshan Tunnel is a typical city shallow-buried long-span tunnel.In order to control the effect of blasting vibration in tunnel excavation and reduce the influence of underpass tunnel on residential area and building structure, the blasting operation was carried out by using the technology of electronic detonator blasting with slight difference between holes in the course of tunnel cutting blasting.Considering the effect of millisecond time on blasting vibration and blasting effect, 5 Ms / 6 Ms / m 7 Ms / s and 10 Ms / m / s time of millisecond difference were selected to test the blasting effect respectively. The blasting effect was obtained under different time of slight difference between holes, and then the optimal selection scheme was obtained.Combined with the optimum selection of seismic velocity, vibration frequency and blasting effect, the results show that the maximum vibration velocity of the measuring point is less than 1.5 cm / s when the time of slight difference between holes is 7 Ms, which is controlled within the safety standard of vibration.The lowest vibration frequency is higher than 30 Hz, and the probability of resonance with the building structure is small, and the rock breaking effect is better.
【作者单位】：中铁十一局集团第三工程有限公司;武汉理工大学资源与环境工程学院;
【分类号】：U455.6;U456

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