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[III-178] A consideration on critical strain used as a hazard warning levels in tunnel excavation

*Daisuke Ishikawa¹, Yuki Wakabayashi¹, Yoshitsugu Takekoshi², Naoki Tachibana² (1. Japan Railway Construction, Transport and Technology Agency, 2. CHUO FUKKEN CONSULTANTS CO.,LTD.)

Keywords:

Critical strain,Hazard warning levels,Stress-strain relationship,Uniaxial compressive strength