目前高铁隧道施工存在的问题及改进措施——以京沈铁路北台子隧道工程为例

Some Issues Concerning Construction of High Speed Railway Tunnels and Corresponding Countermeasures：A Case Study of Beitaizi Tunnel on the Beijing-Shengyang Railway

摘要: 目前在我国高铁隧道施工中，存在光面爆破效果差、隧道施工步距制约开挖进度、二次衬砌拱顶出现脱空、空洞等质量问题，以及长大隧道通风等问题。基于此，文章依托京沈高铁北台子隧道工程实例，针对这些主要问题进行深入分析，并提出了合理的解决措施。工程实践表明，施工效果良好。

Abstract: In light of the poor effect of smooth blasting, restriction of excavation progress by step pitch of tunnel construction, occurrence of void and cavity at crown of secondary lining as well as ventilation problem in long tunnels, a thorough analysis was conducted and some countermeasures were proposed based on the Beitaizi tunnel on the Beijing-Shenyang high speed railway.