サイスミックコーンとロータリーパーカッションドリルを併用した地盤調査システム

抄録

New ground exploration system is developed for using seismic cone penetration test, and MWD logging which measures resistances and velocity of rotary percussion drill while drilling. The seismic cone penetration test is used for soft soils and the MWD logging for hard soils. The new system can survey from soft soil to hard soil for combining both the seismic cone penetration test and the MWD logging. Presumed N-values. Nc-value and Np-value. estimated from the seismic cone penetration test and the MWD logging are fairly good agreement with SPT N-values respectively.