| 講演要旨(和文) | | 山岳トンネルの事前調査においては、弾性波探査と比抵抗探査の両方が実施される事例が増加しつつある。しかし,現状では,弾性波速度と比抵抗を定量的に組み合わせた解釈手法は確立されていない。一般には、不良地山が想定される部分については比抵抗、それ以外は弾性波速度による解釈が行われている。そこで、地山評価の不確実性に起因する建設コストの変動リスクの低減に着目して弾性波速度と比抵抗の複合解釈手法について検討を行った。その結果、複合解釈を行うことにより、コスト変動リスクを低減させることができた。 |
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| | 講演要旨(英文) | | In the preliminary survey of mountain tunnel, the case of carrying out both of seismic and resistivity prospecting is increasing. However, quantitatively combined interpretation technique of seismic velocity and resistivity prospecting result has not been established. Generally, ground condition evaluation by resistivity is carried out on the part that the bad rock is assumed, and ground condition evaluation by seismic velocity is carried out except for it. Then, the combined interpretation technique of seismic velocity and resistivity was examined from the viewpoint of the reduction in cost variation risk which generated from the uncertainty of ground condition evaluation in preliminary survey. As the result, it was possible that the cost variation risk was reduced by carrying out the combined interpretation. |
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