摘要
以兰州枢纽工程北环隧道上穿既有红山顶铁路隧道为研究对象,通过数值模拟,研究了超小净距隧道爆破施工对既有隧道的影响.结果表明:新建隧道台阶法爆破施工,下方既有铁路隧道受到的影响较小,既有隧道二次衬砌振动速度及衬砌应力能够满足安全性要求,新建隧道可安全通过.
Based on Beihuan tunnel of Lanzhou pivotal project uptraversing Hongshanding tunnel, numeri cal simulation is performed to obtain effects of neighborhood tunnel blasting construction on existing tun nel. The results show that the existing tunnel has been less affected with excavation of bench cut method, and blasting construction, vibration velocity and stress of secondary lining have fulfilled security in existing tunnel, so the newlybuilt tunnel could across over the existing tunnel safely.
出处
《兰州交通大学学报》
CAS
2013年第1期38-40,共3页
Journal of Lanzhou Jiaotong University
关键词
交叉隧道
超小净距
爆破施工
安全性
crossed tunnels
neighborhood
blasting construction
security
