MEASUREMENT RESULTS AND DISCUSSIONS OF A THREE-CENTERED SHIELD TUNNEL WITH DIFFERENT DIAMETERS

Abstract

The Teito Rapid Transit Authority has developed a removable three-centered slurry shield method for station that uses a shield machine for the double track tunnels between stations as part of a three-centered shield machine for station tunnels.
This paper describes the load acting on and stress condition of the tunnel lining to ensure safety during work. Field measurement was made on the lining with the aim of collecting fundamental data to verify the adequacy of the design method. Based on the measurement results, the discussion deals with the effects of load and the sectional force generated in the tunnel circumferential directionduring the work