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    • 2. 发明专利
    • TIMBERING LOCK BOLT AND MANUFACTURE THEREOF
    • JPH03250200A
    • 1991-11-07
    • JP4900290
    • 1990-02-28
    • AARU DEI METARU KKNISHIMATSU CONSTR CO LTD
    • NATSUME SHOSUKETERAMOTO KATSUZO
    • E21D20/00
    • PURPOSE:To manufacture a timbering construction lock bolt excellent in durability by forming a hollow cylindrical unit, parallelly provided with a plurality of protrusive streaks, by rolling and a helical protrusive streak in the peripheral surface of the hollow cylindrical unit and providing connection parts of a drifter and a bit in both ends. CONSTITUTION:A hollow cylindrical unit 5 is formed by hot rolling, and protrusive streaks 6' are parallelly provided in the peripheral surface of the hollow cylindrical unit 5 by rolling. Next, the hollow cylindrical unit 5, whose both ends are fixedly held, is twisted at a cold temperature to work the protrusive streak 6' and a stopper protrusive streak 7' into helical protrusive streak 6 and stopper protrusive streak 7, and thread work, which serves as a drifter connecting part 3 and a machine drilling bit connecting part 4, is applied to both end parts. A machine drilling bit 8 is screw-mounted to the point end of this lock bolt and to a drifter 2 of a drilling machine 1 through a connecting cylinder 10. The machine drilling bit 8 is turned and knocked by actuating the drifter 2 to excavate the ground surface. In this way, sediment or the like can be well discharged from an excavation hole.
    • 4. 发明专利
    • TRUSS TYPE TIMBERING AND TUNNEL EXCAVATION METHOD EMPLOYING TRUSS TIMBERING
    • JPH03180697A
    • 1991-08-06
    • JP31911089
    • 1989-12-08
    • NISHIMATSU CONSTR CO LTD
    • TERAMOTO KATSUZO
    • E21D11/18E21D17/01
    • PURPOSE:To perform reliable and easy execution of a work by arranging a plurality of beam main materials, curved in the same shape as an excavating sectional shape, in juxtaposition at intervals of a proper distance, integrally forming the beam main materials in the shape of a truss by means of a helical lattice material, and effecting concrete lining the beam main material serving as a reinforcing bar material. CONSTITUTION:Two or more beam main materials 1 curved along an excavating sectional shape are arranged in juxtaposition with a distance therebetween, and the beams 1 are intercoupled in the shape of a truss by means of a helical lattice material 2 to build a timbering A0. The timbering A0 is divided into a plural pieces A1, A2..., which are capable of being intercoupled by means of end plates 4. The timbering A0 is located in a tunnel and is coupled to an existing part by means of tie rods 6 for securing. The timbering A0 is deformed and located in an oblique shape, a twist shape, or a helical shape, where necessary. Further, concrete may be placed by using the beam main materials serving as a reinforcing bar material. This method performs execution of a work having load capacity and rigidity and excellent following-up properties.