INFLUENCE ON SEGMENTS BY JACK THRUST OF SHIELD-DRIVEN TUNNELING

Abstract

  The underground in the city part is congested with various infrastructures now. Therefore, the shield-driven tunnel in the future comes to be often planned by large depth. In that case, it is very important for the design of segment to investigate the influence due to construction loads in detail. Shield-jack thrust is the largest influential load to segments.
  In this study, the result of measurements in the deep underground tunnels are investigated at first. Secondary, the basic experiments are operated. These results are verified by three-dimensional FEM analysis. At last, the case studies are executed.
  Results of this study, the influence on segments by shield-jack thrust are showed clearly and the rational design on segments due to the loads.