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为了解并掌握小净距隧道爆破对邻近隧道二衬结构的影响规律,结合温州绕城高速公路西南线工程的横山隧道开展现场振动测试。了解后行洞爆破对先行洞二衬对应后行洞已开挖区域和未开挖区域的振动影响规律,掌握不同工况爆破最大控制药量,在此基础上推导出对应不同控制标准先行洞二衬结构与后行洞掌子面的安全纵距和控制药量。
In order to understand and grasp the impact of tunneling with small clear distance tunnels on the structure of the second lining near the tunnel, the on-site vibration test was carried out in combination with the Yokoyama Tunnel in the project of the southwest line of Wenzhou Ring Expressway. To understand the influence of backhole tunneling on the vibration of excavated and un-excavated areas of the first row of second lining corresponding to the first row of tunnel linings and to grasp the maximum controlled amount of blasting in different working conditions, and to derive the first row of holes corresponding to different control standards Second lining structure and the back of the hole face of the safety of the longitudinal control and dose.