Presentation Information
[VI-111]Large amounts of groundwater seepage and countermeasures that occurred during tunnel construction in volcanic ground
*Toshihiro Koyama1, Junji Uno1, Takanori Kimura1, Ami Muraoka1, Norihisa Nakahara1, Fujio Sushida1, Shoichiro Saito2 (1. TEKKEN CORPORATION, 2. Japan Railway Construction, Transport and Technology Agency)
Keywords:
mountain tunnel,Pliocene,volcaniclastic rock,large amount of spring water,dewatering boring,auxiliary method