JP6963287B2 - How to lay reinforcing bars for concrete pavement and how to pave concrete - Google Patents

Description

The present invention relates to a method for laying reinforcing bars for concrete pavement and a method for pavement of concrete.

Conventionally, when constructing concrete pavement, reinforcing bars are laid inside the concrete to reinforce the concrete slab and prevent cracks and the like. This reinforcing bar is composed of vertical bars and horizontal bars, and is laid flat at a predetermined height inside the paved concrete.

Construction of concrete pavement with such reinforcing bars is usually performed by the following procedure. First, a plurality of spacers for supporting the reinforcing bar at a predetermined height are installed at a plurality of positions on the paved surface before the construction of the concrete pavement. Next, a plurality of horizontal stripes are arranged in parallel on the plurality of spacers installed at predetermined intervals. Next, a plurality of vertical streaks are arranged in parallel on the arranged plurality of horizontal streaks at predetermined intervals. The intersecting portion of the arranged horizontal and vertical streaks is bound by a wire or the like. In this way, horizontal and vertical streaks are arranged in a mesh pattern on the plurality of spacers. Then, concrete is poured and paved. In the case of road pavement, horizontal bars may be arranged at right angles to the direction of travel of the road, but in recent years, in order to enhance the effect of preventing cracks, etc., they may be arranged diagonally to the direction of travel. many.

On the other hand, Patent Document 1 describes an invention relating to a mesh laying type continuous pavement method in which meshes in which reinforcing bars are combined are sequentially arranged and laid on a roadbed.

Japanese Patent No. 3622890

However, the method of installing multiple spacers on the paved surface before construction of concrete pavement and arranging multiple horizontal bars and multiple vertical bars on it is a method of adjusting the placement position of each reinforcing bar and binding work. Etc. was a heavy burden.

On the other hand, in the case of the method described in Patent Document 1 in which meshes in which reinforcing bars are combined are sequentially arranged and laid on the roadbed, a plurality of meshes are temporarily placed on the roadbed so as not to obstruct the course of the stacker. It is designed to be laid by lifting and moving one by one. Therefore, when there is no room in the width direction, such as in a road or tunnel with few lanes, it is conceivable that the temporary storage space for the mesh and the moving space for the work vehicle or the like will be insufficient.

The present invention solves the above-mentioned conventional problems, and is capable of efficiently laying a mesh on a paved surface and paving even when there is no margin in the width direction, and is a reinforcing bar for concrete pavement. It provides a method of laying and a method of pavement of concrete.

In order to solve the above problems, in the method of laying a reinforcing bar for concrete pavement of the present invention, a mesh composed of a plurality of vertical bars and a plurality of horizontal bars connected to the vertical bars is formed on a concrete pavement. A method of laying concrete pavement reinforcing bars to be installed on a pavement surface, wherein the mesh transporting means, the mesh temporary placing means, and the mesh setting means are sequentially arranged and moved on the paved surface by the mesh temporary placing means. A plurality of meshes loaded on the mesh transport means are supported and inverted, and then temporarily placed on a temporary placement position between the mesh installation means and the mesh installation means on the paved surface. It is characterized in that a plurality of meshes temporarily placed in the temporary placement position are supported and inverted, and then installed at a predetermined position on the paved surface.

It is also preferable that the paved surface is inside a tunnel.

Further, it is preferable that the plurality of horizontal bars are diagonally connected to the plurality of vertical bars.

Further, in the concrete pavement method of the present invention, after laying a mesh by the method of laying reinforcing bars for concrete pavement of the present invention, the ready-mixed concrete supply means is moved along the paved surface to pave ready-mixed concrete. It is a feature.

In the method of laying the reinforcing bars for concrete pavement of the present invention, a mesh composed of a plurality of vertical bars and a plurality of horizontal bars connected to the vertical bars is installed on the paved surface of the concrete pavement. be. Then, while the mesh transporting means, the mesh temporary placing means, and the mesh setting means are sequentially arranged and moved on the paved surface, the mesh temporary placing means supports and inverts a plurality of meshes loaded on the mesh transporting means. Then, it is temporarily placed on the temporary placement position between the mesh installation means on the paved surface, and the mesh installation means supports and inverts the plurality of meshes temporarily placed at the temporary placement position. , It is designed to be installed in a predetermined position on the paved surface. Therefore, since the mesh transport means, the mesh temporary placement means, and the mesh installation means all move on the paved surface, even if there is no room in the width direction, the temporary storage place of the mesh, the work vehicle, etc. can be moved. It can deal with the problem of lack of space.

Further, when the paved surface is inside the tunnel, there are many cases where there is no margin in the width direction, and it can be effectively dealt with.

Further, when a plurality of horizontal bars are diagonally connected to the plurality of vertical bars, cracks and the like during road pavement can be prevented more effectively.

Further, when the ready-mixed concrete is placed by moving the ready-mixed concrete supply means along the paved surface after the mesh is laid by the method of laying the reinforcing bars for concrete pavement of the present invention, the ready-mixed concrete is raw along the paved surface. By securing a runway for the concrete supply means, concrete pavement can be performed efficiently.

As described above, according to the present invention, a method for laying reinforcing bars for concrete pavement and concrete pavement capable of efficiently laying and paving a mesh on a paved surface even when there is no margin in the width direction. A method can be provided.

It is a top view which shows the mesh which concerns on embodiment of this invention. It is a top view which shows the mesh which concerns on embodiment of this invention. It is an enlarged plan view which shows the connecting part of a mesh. It is an enlarged cross-sectional view which shows the connecting part of a mesh. It is explanatory drawing of the concrete pavement laying method and the concrete pavement method which concerns on embodiment of this invention. It is a top view which shows the state which the reinforcing bar was laid on the paved surface of a paved road. It is a top view which shows the hanging state of the mesh by the special hanging jig. It is a side view which shows the hanging state of the mesh by the special hanging jig.

Next, a method of laying a reinforcing bar for concrete pavement and a method of concrete pavement according to the embodiment of the present invention will be described with reference to FIGS. 1 to 6.

In the concrete pavement laying method and the concrete pavement method according to the present embodiment, concrete pavement reinforcing bars are laid on a paved surface on a paved road and concrete is paved. FIG. 6 is a plan view showing a state in which a plurality of vertical bars 2 and a plurality of horizontal bars 3 are laid on a paved surface of a paved road composed of an up lane 8 and a down lane 9. In the present embodiment, the plurality of vertical bars 2 are arranged parallel to the traveling direction of the road, and the plurality of horizontal bars 3 are arranged diagonally with respect to the traveling direction of the road.

Further, the present embodiment is intended for a paved surface in a tunnel having two lanes (up lane 8 and down lane 9).

First, the mesh used in the concrete pavement reinforcing bar laying method and the concrete pavement method according to the present embodiment will be described. In the present embodiment, the mesh M shown in FIGS. 1 and 2 is used when laying the plurality of vertical bars 2 and the plurality of horizontal bars 3. The mesh M is composed of a plurality of vertical bars 2 and a plurality of horizontal bars 3 connected to the vertical bars 2 and is formed in a wire mesh shape. The plurality of vertical stripes 2 are arranged parallel to each other. Similarly, the plurality of horizontal stripes 3 are arranged parallel to each other. Then, in the present embodiment, the plurality of horizontal bars 3 are diagonally connected to the plurality of vertical bars 2.

The vertical bar 2 and the horizontal bar 3 can be connected by welding, or can be bound by a wire or the like. The mesh M is formed in an appropriate size in consideration of installation on a paved surface, transportation, and the like. Then, continuous reinforced concrete pavement can be constructed by sequentially laying mesh M on the paved surface and placing concrete. The vertical streaks 2 and the horizontal streaks 3 project from the ends of the mesh M so as to overlap with the adjacent meshes. Further, the protruding positions of the mesh M are different between FIGS. 1 and 2 so as to correspond to the installation location.

3 and 4 are an enlarged plan view and an enlarged cross-sectional view showing a connecting portion of the mesh M, respectively. The horizontal streaks 3 are diagonally connected so as to form an angle θ with respect to the vertical streaks 2. The angle θ can be set as appropriate, but is preferably 60 degrees. Further, the vertical streaks 2 and the horizontal streaks 3 are connected so that the horizontal streaks 3 are on the lower side. The mesh M is supported at a predetermined height on the paved surface via a spacer.

Next, with reference to FIG. 5, a method of laying reinforcing bars for concrete pavement and a method of concrete pavement according to the present embodiment will be described. FIG. 5 is an explanatory diagram of a concrete pavement reinforcing bar laying method and a concrete pavement method according to the embodiment of the present invention, and is performed in the order of (a) → (b) → (c) → (d).

In FIG. 5, each reference numeral is a tunnel 1, a mesh transport means 4, a mesh temporary placement means 5, a mesh installation means 6, a ready-mixed concrete supply means 7, an up lane 8, a down lane 9, temporary placement positions 10, 20, 30 and. Shows mesh M. The number after the mesh M indicates the number of meshes placed at that position.

The mesh transporting means 4 is for loading and transporting a plurality of meshes M laid on the paved surface, and for example, a truck provided with a loading platform can be used. Further, a large number of meshes M for laying are loaded on the mesh transport means 4.

The mesh temporary placement means 5 is for supporting and inverting a plurality of meshes loaded on the mesh transport means 4, and then temporarily placing them on the temporary placement positions 10, 20, and 30, for example, a truck type. It can be lifted and supported using the rough terrain crane of. When using a crane, the working radius shall be one considering that the work is done in a tunnel.

The mesh installation means 6 is for supporting and inverting a plurality of meshes temporarily placed at the temporary placement positions 10, 20, and 30 and then installing the mesh at a predetermined position on the paved surface, for example, a caterpillar type. Can be lifted and supported using a crawler crane. When using a crane, the working radius shall be one considering that the work is done in a tunnel.

The mesh temporary placement means 5 and the mesh installation means 6 are not limited to those in which the mesh M is suspended and rotated while being inverted like a crane, and the positions of the supported mesh M are inverted (to the opposite side). Anything that can be moved) will do.

In the present embodiment, the down lane 9 is a paved surface (mesh M laying target area), and the mesh transport means 4, the mesh temporary placement means 5, and the mesh installation means 6 are sequentially placed on the paved surface (down lane 9). Have been placed. Then, while moving the mesh transporting means 4, the mesh temporary placing means 5, and the mesh setting means 6, the direction toward the mesh setting means 6 → the mesh temporary placing means 5 → the mesh transporting means 4 (from the left side to the right side in FIG. 5, hereinafter “ The mesh M is laid in order in the "mesh laying direction").

The ready-mixed concrete supply means 7 is for placing ready-mixed concrete after laying a mesh on the paved surface, and for example, a mixer truck can be used. The ready-mixed concrete supply means 7 moves in the adjacent up lane 8 along the down lane 9 which is a paved surface.

Next, a specific method for laying reinforcing bars for concrete pavement and a concrete pavement method will be described in order. First, as shown in FIG. 5A, the mesh temporary placing means 5 supports and inverts the plurality of meshes M loaded on the mesh transporting means 4, and then the mesh setting means 6 on the paved surface. Temporarily place it on the temporary placement position 10 between (arrow A). In the present embodiment, the mesh temporary placing means 5 lifts four meshes M one by one and stacks them at the temporary placing position 10.

Next, as shown in FIG. 5B, the mesh installation means 6 supports and inverts a plurality of (4 sheets) meshes temporarily placed at the temporary placement position 10, and then reverses the mesh M on the paved surface. Install in place (arrow B). In the present embodiment, the mesh installation means 6 lifts four meshes M one by one and spreads them at a predetermined position on the paved surface.

Further, after moving the mesh temporary placing means 5 in the mesh laying direction, the plurality of meshes M loaded on the mesh transporting means 4 are similarly supported and inverted, and then the mesh setting means 6 on the paved surface is used. Temporarily place it on the temporary placement position 20 between (arrow C). In the present embodiment, the mesh temporary placing means 5 lifts four meshes M one by one and stacks them at the temporary placing position 20.

Next, as shown in FIG. 5C, the mesh installation means 6 supports and inverts a plurality of (4 sheets) meshes temporarily placed at the temporary placement position 20, and then reverses the mesh M on the paved surface. Install in place (arrow D). In the present embodiment, the mesh installation means 6 lifts four meshes M one by one and spreads them at a predetermined position on the paved surface.

Further, after moving the mesh temporary placing means 5 in the mesh laying direction, the plurality of meshes M loaded on the mesh transporting means 4 are similarly supported and inverted, and then the mesh setting means 6 on the paved surface is used. Temporarily place it on the temporary placement position 30 between (arrow E). In the present embodiment, the mesh temporary placing means 5 lifts four meshes M one by one and stacks them at the temporary placing position 30.

Next, as shown in FIG. 5D, the mesh installation means 6 supports and inverts a plurality of (4 sheets) meshes temporarily placed at the temporary placement position 30, and then reverses the mesh M on the paved surface. Install in place (arrow F). In the present embodiment, the mesh installation means 6 lifts four meshes M one by one and spreads them at a predetermined position on the paved surface.

While repeating the above steps, the mesh M is laid on the paved surface along the mesh laying direction.

After laying the mesh M in this way, the ready-mixed concrete supply means 8 places the ready-mixed concrete while moving in the up lane 8 along the paved surface.

In the method of laying the reinforcing bars for concrete pavement according to the present embodiment, a mesh M composed of a plurality of vertical bars 2 and a plurality of horizontal bars 3 connected to the vertical bars 2 is formed on the paved surface of the concrete pavement. It is to be installed in. Then, while the mesh transporting means 4, the mesh temporary placing means 5, and the mesh installing means 6 are sequentially arranged and moved on the paved surface, a plurality of meshes loaded on the mesh transporting means 4 by the mesh temporary placing means 5 are used. After M is supported and inverted, it is temporarily placed on the temporary placement positions 10, 20, and 30 between the mesh installation means 6 and the paved surface, and the temporary placement positions 10, 20 are placed by the mesh installation means 6. A plurality of meshes M temporarily placed on the pavement surface are supported and inverted, and then installed at a predetermined position on the paved surface. Therefore, since the mesh transport means 4, the mesh temporary placement means 5, and the mesh installation means 6 all move on the paved surface, even if there is no room in the width direction, the mesh temporary storage place and the work vehicle It is possible to deal with the problem of lack of moving space such as.

Further, since the paved surface is inside the tunnel 1, there are many cases where there is no margin in the width direction, and it is possible to effectively deal with it.

Further, since the plurality of horizontal bars 3 are diagonally connected to the plurality of vertical bars 2, cracks and the like during road pavement can be prevented more effectively.

Further, after laying the mesh M by the method of laying the reinforcing bars for concrete pavement according to the present embodiment, the ready-mixed concrete supply means 7 is moved along the paved surface to cast the ready-mixed concrete, so that the ready-mixed concrete is placed along the paved surface. By securing the runway of the ready-mixed concrete supply means 7, concrete pavement can be performed efficiently.

As described above, even when there is no margin in the concrete pavement method, the concrete pavement method, and the width direction according to the present embodiment, the mesh can be efficiently laid and paved on the paved surface. ..

Although the method of laying the reinforcing bar for concrete pavement and the method of pavement of concrete according to the embodiment of the present invention have been described above, the present invention is not limited to the above-described embodiment, and various other modifications can be made. For example, in the present embodiment, the mesh 1 has vertical and horizontal streaks connected diagonally, but the vertical and horizontal streaks may intersect at right angles.

Further, in the present embodiment, the paved surface in the tunnel of two lanes (up lane 8 and down lane 9) is targeted, but it is effective even in a tunnel having more lanes, and further, the tunnel. Even outside, it is effective especially in places where there is no room in the width direction.

Further, in the present embodiment, four meshes M are stacked at one temporary placement position, but the number of meshes M stacked at one temporary placement position is not limited to this.

Further, in the present embodiment, a plurality of meshes M loaded on the transportation means and a plurality of meshes M temporarily placed at the temporary placement position are lifted one by one. A plurality of sheets may be lifted at one time by using the dedicated hanging jig 40 as shown.

As shown in FIG. 7, the dedicated hanging jig 40 is formed of a member such as iron in a rectangular shape that is one size smaller than the mesh M, and is provided with four wire fixing portions 44 on the upper surface and side surfaces. Three wire fixing portions 41, 42, and 43 are provided at the central portion and both end portions in the longitudinal direction of the above.

FIG. 8 _{shows a state in which three meshes M 1} , M ₂ , and M 3 are lifted at one time. _{The wire W 4} from the crane 50 is fixed to the wire fixing portion 44, and the dedicated hanging jig 40 is suspended. Then, the mesh M _{1 was fixed to the wire fixing portion 43 by the six wires W 1} fixed to the wire fixing portion 41, and the mesh M ₂ was fixed to the wire fixing portion 43 _{by the six wires W 2} fixed to the wire fixing portion 42. 6 wires _{W 3} by the mesh _{M 3} have suspended respectively. The length of the wire is wire W ₁ <wire W ₂ <wire W ₃ . The wire W ₂ passes through the confucius-shaped gap of the mesh M _{1 , and the wire W 3} passes through the confucius-shaped gap of the mesh M ₁ and the mesh M ₂ .

In this way, a plurality of (three) meshes M can be lifted at one time by the dedicated hanging jig 40. Then, if the wires W for suspending the mesh M are removed for each mesh, the wires W can be installed one by one.

1 Tunnel 2 Vertical bar 3 Horizontal bar 4 Mesh transport means 5 Mesh temporary placement means 6 Mesh installation means 7 Ready-mixed concrete supply means 8 Up lane 9 Down lane 10 Temporary position 20 Temporary position 30 Temporary position 40 Dedicated hanging jig 41 Wire Fixing part 42 Wire fixing part 43 Wire fixing part 44 Wire fixing part 50 Crane M mesh W wire

Claims (4)

A method of laying concrete pavement reinforcing bars in which a mesh composed of a plurality of vertical bars and a plurality of horizontal bars connected to the vertical bars is installed on the paved surface of the concrete pavement.
While moving the mesh transport means, the mesh temporary placement means, and the mesh installation means in order on one side lane , which is the paved surface, while moving them.
The mesh temporary mounting means supports and inverts a plurality of meshes loaded on the mesh transporting means, and then superimposes the mesh temporarily on the paved surface on one side of the lane with the mesh mounting means. Temporarily place
A concrete pavement reinforcing bar characterized in that a plurality of meshes temporarily placed in the temporary placement position are supported and inverted by the mesh installation means, and then installed at a predetermined position on one lane, which is a paved surface. How to lay. The method for laying a reinforcing bar for concrete pavement according to claim 1, wherein the mesh temporary placing means supports and inverts a plurality of meshes at a time and then temporarily places the mesh temporarily at the temporary placing position. The method for laying a reinforcing bar for concrete pavement according to claim 1 or 2, wherein the mesh installing means supports and inverts a plurality of meshes at a time and then installs the mesh at a predetermined position. After laying the mesh by the method for laying the concrete pavement reinforcing bar according to any one of claims 1 to 3, the ready-mixed concrete supply means is moved along the paved surface in the adjacent opposite lane. A concrete pavement method characterized by placing ready-mixed concrete.

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