ABSTRACT
In the design code of shield tunnel in Japan (JSCE, 1996), the earth pressure acting upon the segment lining is calculated by the overburden pressure or Terzaghi’s loosening earth pressure according to the stratum condition and the overburden height only. However, it is known that the earth pressure is also influenced by the construction conditions (e.g. backfill grouting, position adjusting of shield machine), and the interaction between the ground and man-made structures (e.g. tunnel lining, pile foundation). In most cases, these factors work together and undistinguishable. Therefore, nowadays the mechanical behavior of the earth pressure upon shield tunnel lining has not been clearly clarified yet.
