公路隧道施工对既有接近高铁隧道影响分析

ANALYSIS ON INFLUENCE OF HIGHWAY TUNNEL CONSTRUCTION ON THE EXISTING HIGH-SPEED RAILWAY TUNNEL

依托毕节七星大道竹园东至东关道路工程将军山隧道,采用数值模拟的方法,考虑爆破等因素,研究既有高铁隧道受公路隧道施工的影响。通过研究,得出以下结论:新建将军山隧道施工对成贵铁路将军山隧道无静力影响;当成贵铁路将军山隧道的振动速度控制标准取5 cm/s时,新建将军山隧道的进尺长度不超过6.3 m;若新建将军山隧道按进尺3 m,单段掏槽起爆在成贵铁路将军山隧道处的振动速度最大为4.3 cm/s,均小于控制标准5 cm/s。

Based on the Jiangjunshan tunnel of Zhuyuan east to Dongguan Road Project of Qixing Avenue in Bijie,the paper studies the influence of highway tunnel construction on the existing high-speed railway tunnel by using numerical simulation method and considering the factors such as blasting.Through the research,the following conclusions are obtained.The construction of new Jiangjunshan tunnel has no static impact on Jiangjunshan tunnel of Chengdu Guiyang railway;when the vibration speed control standard of Jiangjunshan tunnel on Chengdu Guiyang railway is 5 cm/s,the footage length of the new Jiangjunshan tunnel shall not exceed 6.3 m;if the new Jiangjunshan tunnel is excavated and detonated in a single section with a footage of 3 m,the maximum vibration velocity at the Jiangjunshan tunnel of Chengdu Guiyang railway is 4.3 cm/s,which is less than the control standard of 5 cm/s.