Simple evaluation of the effect of seismic isolation by covering a tunnel with a thin flexible material

✍ Scribed by Kazuo Konagai; Dae-Sang Kim

• Publisher: Elsevier Science
• Year: 2001
• Tongue: English
• Weight: 415 KB
• Volume: 21
• Category: Article
• ISSN: 0267-7261
• DOI: 10.1016/s0267-7261(01)00012-4

✦ Synopsis

Long-term earthquake observations at different tunnel sites within a variety of alluvial soil deposits have clearly demonstrated that a tunnel, which exhibits rather ¯exible nature within its surrounding soil, follows closely the motion of the soil mass during an earthquake. Therefore, coating a tunnel with a soft material will be a possible measure for minimizing damage to tunnels. This paper provides a clear perspective on the feasibility of this measure by using simple solutions to idealized problems.