The design and construction of pillar reinforcement at horizontal twin tunnels

Hiroshi KURIYAMA; Tokuji KOGA; Takaya OGATA; Hidemitsu NAKAMURA; Takeshi KAMBAYASHI

doi:10.11532/journalte1991.10.125

PROCEEDINGS OF TUNNEL ENGINEERING, JSCE

Online ISSN : 1884-9091
ISSN-L : 1345-0832

The design and construction of pillar reinforcement at horizontal twin tunnels

Hiroshi KURIYAMA, Tokuji KOGA, Takaya OGATA, Hidemitsu NAKAMURA, Takeshi KAMBAYASHI

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Keywords: urban NATM, twin tunnel, pillar, observation construction

JOURNAL FREE ACCESS

2000 Volume 10 Pages 125-130

DOI https://doi.org/10.11532/journalte1991.10.125

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Abstract

NATM is used for excavation of department tunnel between stations in construction of subway line No.3 by Fukuoka-city traffic bureau.
There is a section of cross change from large tunnel to small twin tunnel. That section (at twin tunnel side) there are not many intervals in each tunnel. And grounds are easy to destroy caused by the impact of KEGO fracture.
It is weighty the grasping behaviors of ground. Especially NATM in urban site adapt the observation construction reasons of safety.

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