THE DESIGN TECHNIQUE OF THE CUT AND COVER TUNNEL IN CASE OF REMOVING A BRACE BY THE METHOD OF REPLACEMENT OF BRACE REACTION USING SIDE WALL

Abstract

During constructing the cut and cover tunnel, the brace may be removed by “The method of replacement of brace reaction using side wall”. However, the evaluation for the structural stress in case of applying this method is not clear at this moment.
In this paper, we propose the design method of the cut and cover tunnel when the brace is removed by this method.
This design is the method of calculating the residual stress that is relaxed by creep characteristic of concrete after a long period of time.