JPH052717Y2 - - Google Patents

Description

[Detailed description of the invention] (Technical field to which the invention belongs) The present invention relates to a reinforcement jig used when constructing a tunnel lining by directly pouring concrete.

(Issues of the design and its features) In tunnel construction using shields, linings were traditionally constructed using segments, but recently, linings have also been constructed by directly pouring concrete. Ta.

The purpose of this invention is to provide a reinforcing jig that is convenient when constructing tunnel linings by directly pouring concrete, and its structural features are within the scope of the utility model registration claim. As described.

In the reinforcing bar arrangement jig of the present invention, the ends of the assembling bars are removably fixed to the assembling bar attachment fittings in advance at an appropriate location on the ground, inside a tunnel, etc. Assemble the reinforcing bars in the circumferential and axial directions to form a reinforcing bar unit, move this to a predetermined installation location, connect that reinforcing bar unit with the previously installed reinforcing bar unit,
This is to arrange reinforcement for tunnel lining.

(Specific explanation of the invention using drawings) Figures 1 to 5 are explanatory diagrams of an embodiment of the invention.
In the figure, the reinforcing bar arrangement jig 1 is formed into a rectangular frame shape by connecting assembly reinforcing bar attachment fittings 2 placed at the four corners with iron band plates 3, and has a curvature in one direction that is approximately equal to the curvature of the cross section of the tunnel. It is curved in an arc shape, and a perforated projecting piece 5 is attached to the center part of the back side (the side of the center of curvature of the curvature) via an intermediate band iron plate 4,
When moving the reinforcing bar arrangement jig 1, the projecting piece 5 is grasped.

It is sufficient that the assembly bar mounting bracket 2 can temporarily tighten and fix one end of the assembly bar (round steel).
The specific structure is arbitrary, but the one shown is
In addition to providing a hole 6 in the round steel into which one end of the assembly bar is inserted (it is preferable to provide an uneven surface on the inner circumferential surface of the hole 6 to prevent slipping), it is divided vertically into two parts, and one of the holes 7
is defined as a fixed side, and the other side (movable side) 8 is connected to this by a hinge 9, and a tightening bolt 10 is passed through the fixed side and the movable side.

The reinforcing bar unit 11 is attached to the aforementioned reinforcement jig 1 at an appropriate location on the ground or in a tunnel in a manner as illustrated in FIGS. 6 and 7.
At this time, after inserting one end of the assembly reinforcement 12 into the hole 6 of each assembly reinforcement fitting 2 and tightening and fixing it, the reinforcement 13 in the tunnel circumferential direction and the reinforcement 14 in the tunnel axial direction are inserted through the assembly reinforcement 12. Assemble in a predetermined arrangement.

The reinforcing bar arrangement jig 1 with the reinforcing bar unit 11 attached thereto is carried into the tail part of the shield (not shown) by an appropriate means, and the protruding piece 5 is grabbed by an erector and moved to a predetermined installation location, and the reinforcing bar unit 11 is attached to the previously installed reinforcing bar. Connect it to the unit, and once the connection is completed, the assembly bar 12
is removed from the assembly bar attachment fitting 2, and the empty bar arrangement jig 1 is sent to a predetermined location for installing a new reinforcing bar unit.

Note that the reinforcing bars units are connected to each other by connecting the corresponding reinforcing bars 13 and 14 with lap joints, but in order to avoid concentrating the joints on one cross section, these ends are connected when assembling the reinforcing bars 13 and 14. Preferably, they are not aligned as shown.

(Effects of the invention) Since the reinforcing bar arrangement jig of the present invention is as described above, it is not possible to assemble a specified reinforcing bar unit on it or move the reinforcing bar unit to a specified installation location. Both of these methods are easy to use, and by using this method, reinforcement work can be carried out extremely efficiently when the lining of a tunnel is formed of directly cast concrete.

[Brief explanation of drawings]

Fig. 1 is a plan view of an embodiment of the present invention, Fig. 2 is a front view, Fig. 3 is a side view, Fig. 4 is a plan view of an example of the assembly bar mounting bracket, and Fig. 5 is the same. A side view, FIG. 6 is a plan view with the reinforcing bar unit attached, and FIG. 7 is a sectional view. 1...Jig for reinforcing reinforcement, 2...Bracket for attaching assembly reinforcement,
5...Protrusion.

Claims (1)

[Scope of utility model registration request] Arrange assembly bar mounting brackets at least in the four corners,
A rebar arrangement jig for tunnel lining, which is formed in the shape of a rectangular frame, curved in an arc shape in one direction, and provided with a protruding piece for gripping during movement at the center of the back side.