method of shield tunnel lining under internal water pressure
N. OKANO1, S. KONISHI1, K. KOBAYASHI2,
A. KOENUMA2, K. OHISHI3, A. DAN4
1.Railway Technical Research Institute; 2. Tokyo Metropolitan Government; 3.
Teito Rapid Transit; 4. Nippon Civic Consulting Engineers Co., Ltd.
Modern Tunneling Science and Technology: Proceedings of the International Symposium
on Modern Tunneling Science and Technology. Swets & Zeitlinger. October,
2001. ISBN 90 2651 860 9
Key words: shield tunnel, segment lining, underground reservoir, internal water
pressure, beam-spring model, lining design
The Tokyo Metropolitan Government plans to construct the Kanda River/Loop 7
Underground Regulation Pond Work (2nd phase). The pond will be constructed
by the shield tunneling method and the completed tunnel will occasionally be
under internal water pressure. Therefore, the shield tunnel will have a different
load condition from that of regular railway, transmission line, or other tunnels.
We focused on the sub-grade response and spring and tensile rigidity of segment
joints in a beam-spring analysis model for the structural design of segments
under internal water pressure. Using the beam-spring analysis model, we prepared
an economical cross-sectional design for the shield tunnel. The dimensions
were: external diameter 13.7 m, internal diameter 12.5 m, depth of overburden