In order to ensure the construction safety of Guinan high-speed railway Jialiang No.3 tunnel crossing the giant karst cave section,the research on the construction technology of double-line high-speed railway tunnel crossing the giant karst cave is carried out.It is proposed to replace the reinforced arch protection+system anchor reinforcement in the cave,and apply strip foundation+steel pipe column retaining wall support outside the cave to ensure that the tunnel is excavated first through the giant karst cave section to ensure that the tunnel is completed on schedule.At the same time,the influence of karst cave on tunnel construction is minimized.The results show that the construction technology effectively ensures the safe and rapid construction of the tunnel across the giant karst cave section.The maximum vault settlement is 8.61 mm,and the maximum clearance convergence is 4.17 mm,which is far less than the deformation control value.It can provide reference for tunnel construction in similar karst areas.
关键词
双线高铁隧道/巨型溶洞/先掘后探/现场监测
Key words
double-track high-speed railway tunnel/giant karst cave/digging first and then exploring/field monitoring
维普
万方数据