The Sambongihara Tunnel is on the Tohoku Shinkansen Line. The geology of this tunneling site mainly consists of alternating layers of unconsolidated sandy soil under high hydraulic pressures and cohesive soil. This tunnel was excavated using the NATM, but the tunnel face collapsed twice, preventing the tunnel construction from advancing as scheduled. We therefore conducted an in-depth study to develop a new tunneling technique, aimed at improving efficiency and safety of the work. The new tunneling method uses a standard earth and mud pressure shield to maintain face stability and ensure good excavating capability. This paper outlines the construction and design of the linings selected for this tunneling practice.
|ホスト出版物のタイトル||Geotechnical Aspects of Underground Construction in Soft Ground - Proceedings of the 5th International Conference of TC28 of the ISSMGE|
|出版ステータス||Published - 2006|
|イベント||5th International Conference of TC28 of the International Society for Soil Mechanics and Geotechnical Engineering, ISSMGE - Amsterdam|
継続期間: 2005 6月 15 → 2005 6月 17
|Other||5th International Conference of TC28 of the International Society for Soil Mechanics and Geotechnical Engineering, ISSMGE|
|Period||05/6/15 → 05/6/17|
ASJC Scopus subject areas