シールドトンネル(3)

[VI-551] Estimation of geological structure and groundwater by geological surveys based on airborne electro-magnetics

〇Naoki Tomisawa¹, Takashi Kouma¹, Nobuo Higuchi¹, Takuo Katoh¹, Masaki Fujita² (1.Konoike Construction Co.Ltd, 2.City of Sapporo Waterworks Bureau)

Keywords:resistivity of ground, geological surveys based on airborne electro-magnetics, mud pressure shield method, fluid transportation, groundwater

During constructing a headrace tunnel, face pressure and water inflow increased, so it was necessary to change the excavation method.Therefore, in order to estimate the geological structure and groundwater, we applied geological surveys based on airborne electro-magnetics.