在挪威近海隧道建造前的岩石质量评定中,采用海底炮点和水听器电缆的折射地震法已成为标准的地球物理方法。为了建造海底隧道,挪威公路管理局开展了一项研究项目,即用折射地震法及其他方法对二条低速带作了研究和比较。为了进行海底单极-偶极测量,还专门制作了电阻率电缆。另外,采 Refraction seismic methods using submarine shots and hydrophone cables have become standard geophysical methods in the rock quality assessment of Norwegian offshore tunnels prior to their construction. In order to construct the Cross Harbor Tunnel, the Norwegian Highway Authority conducted a research project to study and compare two low-velocity belts with refraction seismic and other methods. Resistivity cables have also been specially fabricated for submarine monopole-dipole measurements. In addition, mining