客运专线串珠状岩溶隧道辅助坑道设置与施工

Design and construction of auxiliary tunnels in beaded karst adit applied in passenger line

客运专线单洞双线长大隧道在遭遇串珠状发育的岩溶地质时,合理地设置辅助坑道,通过超前施工横通道增加工作面,以双向处理及渡过大型溶洞区段,可有效规避安全隐患与工期风险。文章通过对我国第1条时速350 km/h武广客运专线海棠隧道辅助坑道的设置原则、施工措施等进行介绍及施工方法进行比较,阐述了综合超前地质预报技术、小断面导坑岩溶快速处治工艺等措施在岩溶隧道辅助导坑设置与施工中的重要意义。

When the long and large tunnel with double rails in single hole applied in passenger line confronted with the beaded karst geology, designing auxiliary tunnels, increasing working faces by advance construction of cross channel and bilateral treatment could get through large cave section ,which can effectively circumvent the security risk and duration risk.In this paper, the importance of comprehensive geological prediction technology,fast treatment process for karst in small adits,other measures via the design and construction of auxiliary tunnel of China first 350 km/h speed Haitang tunnel applied in Wuhan-Guangzhou passenger line in beaded karst adits is described by introducing the setting principles and construction measures of auxiliary, tunnels,and comparing the construction methods.