技術開発(1)

[VI-71] The development of the special medicinal solution infusion mechanic in the ground which is fast in a flow of the groundwater and construction of the freeze mechanic

〇yasuhiko uchida¹, nobuyuki hara¹, hirohisa tanimuro², satoshi yoshida³ (1.TAISEI CORPORATION, 2.Osaka Bousui Construction, 3.SEIKEN)

Keywords:fast ground water, diameter expansion double-pipe and double-packer, double tubestrainer diplophase, freezing, bit exchange