Transport Research International Documentation (TRID) https://trid.trb.org/ en-us Copyright © 2024. National Academy of Sciences. All rights reserved. http://blogs.law.harvard.edu/tech/rss tris-trb@nas.edu (Bill McLeod) tris-trb@nas.edu (Bill McLeod) Transport Research International Documentation (TRID) https://trid.trb.org/Images/PageHeader-wTitle.jpg https://trid.trb.org/ EVALUATION OF SOUNDNESS IN THE LONG UNDERSEA TUNNEL BASED ON LONG TERM CONVERGENCE MEASUREMENT AND MEASUREMENT OF LINING STRESS https://trid.trb.org/View/1395704  In this paper, the current soundness of the lining is evaluated by focusing long term convergence measurement, visual inspection and measuring stress of lining, for the purpose of grasp of the long term properties of the tunnel and proper maintenance. As the result, in most cases, the displacement is small. On the other hand, in some of section which has been measured displacement relatively large, lining stress is basically equal to the design strength. However it is smaller than compression strength. In addition, the authors also evaluate soundness of the future of lining, by consideration of forecasting displacement and stress. 長大海底トンネルである青函トンネルは,トンネル周辺地盤に注入を実施して形成した止水ゾーンにより,強大な水圧を覆工コンクリートに直接作用させないように設計されている.このような特殊な条件下にあるトンネルの長期的挙動の把握および今後の適切な維持管理のため,トンネル本坑の内空変位の長期計測,外観検査,覆工コンクリートの応力計測に基づき,覆工コンクリートの健全性を評価した.その結果,内空変位量は全体的に小さく,急激な変位の進行も認められないこと,また,一部の内空変位量が大きい箇所では,覆工コンクリートに設計基準強度相当の応力が生じているものの,当該箇所の圧縮強度よりも十分小さいこと,さらに,今後予想される覆工コンクリートの応力増加を考慮しても,その健全性が損なわれることはないことが明らかとなった.]]> Fri, 22 Apr 2016 10:48:46 GMT https://trid.trb.org/View/1395704 The Effect of the Seikan Tunnel on Intercity Passenger Transport in Japan https://trid.trb.org/View/841590 Tue, 18 Dec 2007 11:52:46 GMT https://trid.trb.org/View/841590 SEIKAN TUNNEL COMMISSIONED AFTER 24 YEARS OF CONSTRUCTION https://trid.trb.org/View/400530 Thu, 21 Jul 1994 00:00:00 GMT https://trid.trb.org/View/400530 A STUDY ON THE EXPECTED LIFE OF RAILS IN THE SEIKAN TUNNEL https://trid.trb.org/View/72060 Tue, 14 Mar 1978 00:00:00 GMT https://trid.trb.org/View/72060 THEY'RE BUILDING THE SUPER-RAILROAD https://trid.trb.org/View/13344 Thu, 24 Jan 1974 00:00:00 GMT https://trid.trb.org/View/13344