Field Measurement and Analysis of Longitudinal Stress in U-Shaped Segment of Large Diameter Cross Sea Shield Tunnel
The stress on the segment lining of large diameter cross sea shield tunnels during the construction stage is relatively complex,and it is easy to cause engineering diseases under the coupling effect of soil and water loads and construction loads.This article relies on the Zhanjiang Bay Submarine Tunnel Project of the Guangzhou-Zhanjiang High-speed Railway,and builds a shield tunnel structural health monitoring system at the U-shaped turning point of the Zhanjiang Bay Main Channel Tunnel using wireless automation monitoring method.The longitudinal stress of the segments is measured and analyzed.The research results indicate that the variation of longitudinal stress roughly goes through four stages,namely gradually increasing(before detachment from the shield tail),violently fluctuating(just detachment from the shield tail),gradually decreasing(slurry bonding stage),and gradually increasing in a stepped shape(late stable stage).
NETL
NSTL
万方数据
维普
