開削トンネル・各種基礎 (1)

[VI-883] New Initiatives for Improving BCH Methods (Part 1)
~Validation of the effect of drilling bit improvement by fluid analysis~

*Kennji Hashidate¹, Tadashi Yoshikawa¹, Taisuke Sanagawa², Masayuki Kouda², Yusuke Ide³, Shinichi Tajima³, Junichi Sekiya⁴, Kazuhiko Komatsu⁴ (1. Advanced Construction Technology Center, 2. Railway Technical Research Institute, 3. KAJIMA CORPORATION, 4. CHEMICAL GROUTING CO.,LTD. )

Keywords:cast in place pile , Reverse circulation method, Unsteady Fluid Analysis, Drilling efficiency