摘要
依托渝利铁路长洪岭隧道近距下穿地表城镇(江池镇)减震爆破施工,通过使用电子毫秒电雷管开展减震爆破试验。试验以爆破震动波的干扰降震原理为指导,结合以往工程使用非电毫秒延期导爆管雷管的减震爆破技术,并进行爆破减震动监测,优化爆破参数,形成了在30 m左右近距条件下爆破振速低于1.0 cm/s的电子毫秒电雷管全断面减震爆破开挖技术,达到了近距下穿地表城镇时降低隧道爆破振速、确保地表建筑物安全的目的。同时,拓展了在近距条件下隧道钻爆法使用范围,减少了临时支护,提高了施工工效。
Changhongling tunnel on Chongqing-Lichuan railway crosses underneath Jiangchi town. In the construction of the town-crossing section of the tunnel, vibration-minimizing blasting tests are performed by using electronic detonators. The mentioned tests are carried out under the guidance of interference vibration-minimizing theory. The vibration-mini- mizing blasting is monitored, and the blasting parameters are optimized. Full-face vibration-minimizing blasting technol- ogy with electronic detonators, which achieves less than 1.0 em/s blasting vibration velocity under the condition of about 30 m distance, is established. In the end, the blasting vibration velocity is reduced, the safety of the surface buildings is guaranteed, the primary support of the tunnel is reduced and the construction efficiency is improved.
出处
《隧道建设》
2012年第3期281-286,共6页
Tunnel Construction
关键词
长洪岭隧道
下穿建筑物
电子毫秒电雷管
震动监测
隧道减震爆破
Changhongling tunnel
tunneling underneath surface buildings
electronic detonator
vibration monitoring
vibration-minimizing blasting
