引水隧道爆破施工对临近公路边坡影响浅析

Analysis of the Influence of the Construction Blasting of the Diversion Tunnel on the Adjacent Slope

当隧道爆破施工时,可能导致临近既有公路边坡滚石、浆砌片石脱落以及失稳等风险,影响到公路边坡的正常使用。文中采用Midas有限元软件模拟福州某引水隧道施工爆破对既有公路边坡的影响。结果表明:隧道爆破引起边坡同一纵断面的振速,随着距离的增加,振速不断衰减;计算分析中公路边坡最大振速为0.79cm/s,相对于实际监测值变化约4%,能较好的模拟实际振动规律。研究成果供类似工程参考和借鉴。

When the tunnel is blasted,it may cause the nearby existing slope to roll rocks and cause the stability of the slope to lose stability.It affects the normal use of the slope.In this paper,Midas finite element software is used to simulate the influence of construction blasting of a diversion tunnel in Fuzhou on the existing slope.The results show that as the distance increases,the vibration velocity of the same longitudinal section of the slope is continuously reduced by tunnel blasting.The calculation results of all working conditions show that the maximum vibration velocity of the slope is 0.79 cm/s.Compared with the actual monitoring value,the change is about 4%,which can better simulate the actual vibration law.The research results can be used as reference for similar projects.