Title:
TUNNEL STRUCTURE
Document Type and Number:
Japanese Patent JP3199534
Kind Code:
B2
Abstract:
PURPOSE: To promote execution efficiency by providing fitting grooves parallel with a pair of circular arc slab-shaped segments of the upper part or the lower part of a tunnel structural body and, at the same time, fitting the ends of plane view trapezoid tension members to them to tense between the segments.
CONSTITUTION: The other end side 6b of T-shaped projections 9 of a tension member 6 is gradually inserted into one end side of a parallel T-shaped groove 8 between connection segments NS2 and NS8 at an interval L1. After that, in the czse the projections 9 are inserted up to one ene side 6a in the groove 8, an interval L2 between the projections 9 on one end side 6a has a narrow width, so that the segments NS2 and NS8 are approached to each other. A radius of curvature reduces the radius to form a tunnel structure having a specific radius of curvature R. In addition, the groove on the segment side is so formed that the width thereof becomes gradually wide and, at the same time, between the fitting ends of the tension member can be paralleled. According to the constitution, the tension member can be connected to the segment within a short period of time, and structural stability of a tunnel structure can be promoted.
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Inventors:
Kazuhiro Kobayashi
Seisuke Kikuchi
Seisuke Kikuchi
Application Number:
JP22760193A
Publication Date:
August 20, 2001
Filing Date:
September 13, 1993
Export Citation:
Assignee:
Ishikawajima Building Materials Industry Co., Ltd.
International Classes:
E21D11/08; (IPC1-7): E21D11/08
Domestic Patent References:
| JP3212599A |
Attorney, Agent or Firm:
Masatake Shiga (2 outside)