JPH0718624A - Method for manufacturing bridge block and T-section girder - Google Patents

Abstract

(57) [Summary] [Purpose] When manufacturing a bridge block, streamline the rebar assembly to improve efficiency and reduce labor. [Structure] A large number of mesh reinforcements in which vertical reinforcements 12 and horizontal reinforcements 11 are connected in a grid pattern are manufactured, and these are sequentially assembled from the bottom, and the reinforcing bars at the intersections are bound or point-welded, formwork assembly, and concrete striking. Set up.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a bridge block and a T-section girder.

[0002]

2. Description of the Related Art Conventionally, in the production of bridge blocks and T-section girders, bending-formed vertical and horizontal rebars are sequentially assembled one by one, the intersections of the rebars are tied together to assemble the rebars, and the rebars are then surrounded by a die. The frame was assembled and the concrete was placed. This rebar assembly requires a great deal of time and labor and has been a factor that hinders the efficiency of the manufacturing process of the bridge block.

[0003]

DISCLOSURE OF THE INVENTION The present invention aims to improve the most rationalized reinforcing bar assembling process in the manufacturing process of bridge blocks and T-section girders, so that the bridge blocks and T-section girders can be efficiently manufactured. The purpose is to provide manufacturing technology.

[0004]

The first invention of the present invention is as follows:
A method of manufacturing a bridge block, characterized in that the following technical measures are taken in order to solve the above problems. (A) A horizontal bar and a vertical bar are connected in a grid pattern to manufacture a base mesh bar, a lattice cage web mesh bar, a wing bottom mesh bar, a top center bottom mesh bar, a top mesh bar, and a diagonal mesh bar. . These mesh muscles do not have vertical muscles common to other mesh muscles. (B) At the base portion of the bridge block, the base portion mesh muscles are arranged in two steps with a vertical spacing. (C) Lattice basket-like web mesh streaks are provided at the web rising portion of the bridge block. (D) Wing lower surface mesh reinforcement is inserted into the upper surface of the bridge block from the side of the lattice cage web mesh reinforcement. (E) The lower center mesh line of the upper surface is placed on the lattice basket-like web mesh line, and then the upper surface mesh line is arranged. (F) A diagonal mesh reinforcement is inserted from the end of the lattice cage web mesh reinforcement and the transverse reinforcement is inclined to arrange the diagonal reinforcement. (G) Insert a common vertical line of each mesh line. (H) Bundling or spot-welding the intersecting portions of the reinforcing bars. (I) Formwork assembly and concrete casting are performed.

Next, a second invention of the present invention is a method for manufacturing a T-section girder, which comprises the following technical means. (A) A horizontal streak and a vertical streak are connected in a grid pattern to produce a grid cage web mesh bar, a floor slab mesh bar and a floor slab lower diagonal mesh bar. Each mesh muscle does not have a common vertical muscle attached to other mesh muscles. (B) At the web rising portion of the T-section girder, lattice cage-shaped web mesh lines are arranged. (C) An under-slab diagonal mesh streak is placed on the grid cage web mesh streak. (D) Next, a floor slab mesh streak is placed. (E) The common vertical line is inserted from the end face side. (F) Bundling or spot-welding the intersecting portions of the reinforcing bars. (G) Formwork assembly and concrete casting are performed.

[0006] In this case, if the mesh reinforcement manufactured by connecting the horizontal reinforcements and the vertical reinforcements in a grid pattern and then bending is used as the mesh reinforcement, the reinforcing bar bending process is rationalized, which is more preferable. Also, as the mesh muscle,
It is advisable to use a mesh bar in which a hook-shaped bent portion is formed at the end of the reinforcing bar.

[0007]

According to the method for manufacturing a bridge block and a T-section girder of the present invention, the reinforcing bars are assembled into units that can be sequentially assembled from the bottom and preformed into a mesh-shaped intermediate product, and these are sequentially assembled from the bottom, and the necessary products are obtained. Since the parts are bundled, the work efficiency of the rebar assembly is significantly improved, and the work of the entire method of manufacturing the bridge block and the T-section girder becomes rational.

[0008]

【Example】

[Embodiment 1] FIG. 1 shows a bridge block 10 according to an embodiment of the present invention.
It is a figure which shows 0 bar arrangement. This bridge block is used, for example, in PCs for overpasses that cross over highways.
As a box girder, a block girder with an upper surface width of about 6 m and a bridge axial direction of about 2.5 m will be manufactured.

The bridge block 100 is composed of base mesh ribs 1 and 2, grid cage web mesh ribs 3 at the rising portion of the bridge web, wing lower surface mesh ribs 4, upper center lower mesh ribs 5, upper mesh ribs 6, Diagonal mesh lines 7, 8
Is equipped with. The transverse bar of these rebars is 0.
They are arranged at intervals of about 2 to 0.4 m, and these are connected in a lattice by a large number of vertical stripes to form mesh stripes. Conventionally, the vertical bars and the horizontal bars are assembled one by one, and the intersections thereof are bound by binding wires or joined by spot welding or the like to perform the rebar assembly. In the present invention, the horizontal reinforcement and the vertical reinforcement are assembled in advance in a mesh shape, and the mesh reinforcement is assembled to improve the rebar assembly.

FIG. 5 shows an example of such a mesh rebar and is a plan view of the base mesh rebar 1. In the base mesh muscle 1, a large number of horizontal muscles 11 and a large number of vertical muscles 12 are assembled in advance in a grid pattern and the intersections are welded to produce a mesh mesh mesh. This base mesh muscle 1
Is substantially equal to the width of the base of the bridge block, and the length of the vertical bar 12 is substantially equal to the length of the bridge block to be manufactured in the axial direction. If necessary, the horizontal stripe 1
A bent portion perpendicular to the paper surface of FIG. 5 is formed at the end of 1. As described above, a large number of mesh muscles are produced in advance, but each mesh muscle is not attached with the vertical muscles that are common to other mesh muscles. For example, in the base mesh muscle 1 shown in FIG. 5, the longitudinal muscle 21 is not attached and omitted as described later.

FIG. 6 is a front view (a) of the lattice basket-like web mesh streak 3 at the rising portion of the web of the bridge block, (b).
A side view is shown. The lattice cage-shaped web mesh muscle is formed by hoop muscles 13 which are endless in a hoop shape, and vertical muscles 12 which connect the hoop muscles. FIG. 7 is a plan view of the diagonal bar meshes 7 and 8 and is composed of one vertical stripe 12 and a large number of horizontal stripes 11. The horizontal stripes 11 are diagonal stripes. Figure 8 shows the mesh line 6 on the upper surface of the bridge block.
8 is a plan view of the horizontal stripes 11 and the vertical stripes 12 formed in a mesh shape, and both ends of the horizontal stripes 11 are at positions indicated by broken lines 14 in FIG.
The bent portion is formed in the direction perpendicular to the paper surface of the paper. Further, the common vertical line 22 is shown by an imaginary line and is omitted when the mesh line is manufactured. The length of the lateral ribs 11 of the upper surface mesh ribs 6 substantially matches the width of the upper surface portion of the bridge block, and the length of the vertical ribs 12 is substantially equal to the length of the bridge block in the bridge axial direction.

Next, the reinforcing bar assembling process of the embodiment will be described with reference to FIGS. First, as shown in FIG. 2, in the base of the bridge block, plane grid-like base mesh meshes 1 and 2 are provided.
Are arranged in two steps with the vertical spacing being maintained, and lattice cage web mesh lines 3 in which endless hoops and vertical lines are formed in a mesh shape are arranged at the rising portions of the bridge blocks at both ends thereof. . Next, the common vertical ribs 21 at the bottom of the base mesh ribs 1 and the lattice cage web mesh ribs 3 are inserted from the end face side.

Wing lower surface mesh reinforcements 4 are inserted from the sides of the lattice cage web mesh reinforcements 3 into the lower surfaces of the wing portions projecting to both sides of the upper surface of the bridge block. Longitudinal lines are attached to the lattice basket-like web mesh lines 3 in advance at positions where the wing lower surface mesh lines 4 are supported. Then, the upper center lower mesh ribs 5 are placed on the grid cage web mesh ribs 3. Next, the diagonal mesh lines 7 are inserted. The vertical line of the diagonal mesh line 7 also serves as the vertical line of the lower center mesh line 5 of the upper surface.

The diagonal mesh reinforcement 8 is inserted into the lattice cage web mesh reinforcement 3 from the end of the lattice cage web mesh reinforcement 3, and the transverse reinforcement is inclined to arrange the diagonal reinforcement. On the right side of FIG. 4, the diagonal mesh streaks 8 are arranged in the lattice cage web mesh streaks 3
4 shows a state in which it is inserted into the lattice basket-like web mesh muscle 3 from the end portion of FIG.

Next, the upper surface mesh lines 6 on the upper surface of the bridge block are arranged, and the common vertical lines 22 are inserted. During the above work, the reinforcing bar assembly is completed while binding or spot-welding the intersecting parts of the reinforcing bar as needed. After this, formwork assembly and concrete casting are performed. Figure 9 shows a large bridge block 1
Although the horizontal cross-section of No. 01 is shown, it can be constructed in the same manner by the same manufacturing and assembling procedure of the mesh line as in the above-mentioned embodiment.

In the method of manufacturing a bridge block of the embodiment, since the mesh ribs formed in a plane shape are manufactured in advance and the formwork is assembled so that the mesh bars are stacked in order from the bottom, the bridge block of the conventional bridge block is manufactured. The rebar assembly process, which took the most labor and time during the manufacturing process, has been streamlined, making it possible to manufacture bridge blocks with high efficiency. [Embodiment 2] Reinforcing bars of T-section girders are preliminarily connected to each other in the form of a grid to form horizontal grids and vertical bars.
The floor slab mesh line 32, the floor slab lower diagonal mesh line 33, and the bottom vertical mesh line 34 are manufactured. FIG. 11 is a development view (a) and a front view (b) of the lattice cage web mesh muscle 31. The horizontal streaks 41 and the vertical streaks 42 are combined in a grid pattern, the intersections 43 thereof are spot-welded, and bent along the bending line 44,
As shown in FIG. 11 (b), the front view is formed in a lattice basket shape. The vertical streak 42 that is common to other mesh streaks is not attached. FIG. 12 shows a floor slab lower diagonal mesh streak 33, in which (a) is a plan view and (b) is a front view. Horizontal line 41
The vertical stripes 42 are combined in a grid pattern, the intersections 43 are spot-welded, and the strips are bent along the bending line 44.

FIG. 13 shows a floor slab mesh streak 32.
(A) is a development view and (b) is a front view thereof. Horizontal line 41
The vertical streaks 42 are combined in a grid pattern, the intersections 43 are spot-welded, and the vertical streaks 42 are bent along a bending line 44 to be formed. The vertical streak 42 that is common to other mesh streaks is not attached. FIG. 14 is a bottom vertical mesh streak 34. FIG. 10 is a process drawing showing a reinforcing bar assembling process in the manufacturing process of the T-section girder of the embodiment. The process will be described below with reference to FIG. (A) A lattice basket-like web mesh streak 31 is arranged at the rising portion of the web of the T-section girder, and is erected by the restraining rope 51. (B) The floor slab lower diagonal mesh stirrup 33 is placed on the grid cage web mesh stirrup 31. (C) Next, the floor slab mesh muscles 32 are placed on the grid cage web mesh muscles 31. (D) The bottom vertical mesh line 34 and the common vertical line 45 are inserted from the end face side of the T-section girder. Next, the intersecting portions of the reinforcing bars are bound or spot-welded, and then, as in the usual process, formwork assembly and concrete casting are performed.

In the embodiment, since the pre-formed mesh reinforcing bar is assembled and constructed, the reinforcing bar assembling process is highly efficient.

[0019]

According to the present invention, the reinforcing bar assembly, which requires the most time and labor, is rationally improved in the manufacturing process of the bridge block and the T-section girder, and thus it greatly contributes to the improvement of efficiency.

[Brief description of drawings]

FIG. 1 is a diagram showing a reinforcement of a bridge block according to an embodiment.

FIG. 2 is an explanatory view of a reinforcing bar assembling process of the bridge block of the embodiment.

FIG. 3 is an explanatory diagram of a reinforcing bar assembling process for the bridge block of the embodiment.

FIG. 4 is an explanatory view of a reinforcing bar assembling process for the bridge block of the embodiment.

FIG. 5 is a plan view of the mesh muscle of the example.

6 (a) is a front view and FIG. 6 (b) is a side view of the mesh muscle of the embodiment.

FIG. 7 is a plan view of the mesh muscle of the example.

FIG. 8 is a plan view of a mesh streak of an example.

FIG. 9 is a diagram showing a reinforcement of a bridge block according to another embodiment.

FIG. 10 is a process drawing showing a reinforcing bar assembling process for a T-section girder.

FIG. 11A is a development view of the mesh muscle of the embodiment, FIG.
It is a front view.

FIG. 12A is a plan view of the mesh muscle of the embodiment, FIG.
It is a front view.

FIG. 13A is a developed view of the mesh muscle of the embodiment, and FIG.
It is a front view.

FIG. 14A is a plan view of the mesh muscle of the embodiment, FIG.
It is a front view.

[Explanation of symbols]

1 Base mesh muscle 2 Base mesh muscle 3 Lattice cage web 4 Wing bottom mesh muscle 5 Top center lower mesh muscle 6 Top mesh muscle 7 Diagonal mesh muscle 8 Diagonal mesh muscle 11 Transverse muscle 12 Vertical muscle 13 Hoop muscle 14 Dashed line 21 Common vertical line 22 Common vertical line 31 Lattice cage web mesh line 32 Floor slab mesh line 33 Floor slab lower diagonal mesh line 34 Bottom vertical mesh line 41 Horizontal line 42 Vertical line 43 Intersection point 44 Bending line 45 Vertical line 100 Bridge block 101 Bridge block

Claims (6)

[Claims] 1. When manufacturing a bridge block, the horizontal and vertical lines are connected in a grid pattern to form a base mesh line, a lattice cage web mesh line, a wing underside mesh line, an upper center lower mesh line, and an upper face. Manufacture mesh bars and diagonal mesh bars, leave each mesh bar without a vertical bar common to other mesh bars, and keep the base mesh bars at the upper and lower bar arrangement intervals at the base of the bridge block. And a grid cage web mesh reinforcement at the web rising portion of the bridge block, and a wing bottom mesh reinforcement at the upper surface of the bridge block of the lattice cage web mesh reinforcement. Insert from the side, place the upper center lower mesh line on the lattice basket-like web mesh line, and then arrange the upper surface mesh line, and the diagonal mesh line from the end face side of the lattice basket-like web mesh line. Insert into the cage web mesh bar and incline it to diagonally arrange the bar, and then insert the common vertical bar from the bridge shaft end face side, bind the cross sections of the rebar or tie it together, formwork assembly, concrete -A method for manufacturing a bridge block, which is characterized in that the casting is performed. 2. The method for manufacturing a bridge block according to claim 1, wherein each of the mesh rebars is a mesh rebar manufactured by performing a bending process after connecting horizontal and vertical rebars in a grid pattern. . 3. The method of manufacturing a bridge block according to claim 1, wherein the mesh reinforcing bar is a mesh reinforcing bar having a hook-shaped bent portion formed at an end thereof. 4. When manufacturing a T-section girder, the horizontal stirrup and the vertical stirrup are connected in a grid pattern to manufacture a grid cage web mesh bar, a floor slab mesh bar and a floor slab lower diagonal mesh bar, and each mesh bar. Is not attached to the other longitudinal streaks common to other mesh streaks, and a lattice basket-like web mesh stirrer is arranged at the rising portion of the web of the T-section girder. Place the mesh reinforcement, then place the floor mesh reinforcement, insert the common vertical reinforcement from the bridge shaft end face side, bind or connect the intersecting parts of the reinforcing bars, formwork assembly, concrete casting A method for manufacturing a T-section girder characterized by: 5. The method for producing a T-section girder according to claim 4, wherein, as each of the mesh reinforcements, a mesh reinforcement manufactured by performing a bending process after connecting horizontal reinforcements and vertical reinforcements in a grid pattern is used. . 6. The method for manufacturing a T-section girder according to claim 4, wherein the mesh rebar is a rebar having a hook-shaped bent portion formed at an end thereof.