JP2019173296A - Rebar material for concrete reinforcement, rebar arrangement method using the sane, and manufacturing method of rebar material for concrete reinforcement - Google Patents

Abstract

To provide a rebar material for concrete reinforcement which can reduce work load in comparison with before and be arranged efficiently, and to provide a rebar arrangement method using the same and a manufacturing method of the rebar material for concrete reinforcement.SOLUTION: A rebar material 10 for concrete reinforcement which is used for continuous rebar concrete pavement and formed in a mesh with multiple main rebars 11 arranged in parallel and multiple distributing rebars 12 arranged in parallel as if intersecting diagonally the main rebars 11 is manufactured by diagonally arranging the multiple distributing rebars 12 with their end parts going along the longitudinal direction of the main rebars, arranging first auxiliary rebars 15 to be intersecting the distributing rebars 12, and attaching and fixing the first auxiliary rebars 15 on the multiple distributing rebars 12 to integrate them into a unit rebar arrangement material 16. A rebar arrangement method using the rebar material 10 for concrete reinforcement has a large number of supporting spacers 14 arranged on a roadbed 13, a large number of the unit rebar arrangement materials 16 arranged on the supporting spacers 14, and a large number of the main rebars 11 arranged on the unit rebar arrangement materials 16.SELECTED DRAWING: Figure 1

Description

  The present invention relates to, for example, a reinforcing bar for concrete reinforcement used for continuous reinforced concrete pavement such as a road (especially a road in a tunnel), a railway bed, a bridge, a runway of an airport, an apron, and the like, and a bar arrangement method using the same, and The present invention relates to a method for manufacturing a reinforcing steel for reinforcing concrete.

Conventionally, for example, concrete pavement is performed as road pavement.
In this concrete pavement, in order to prevent the occurrence of cracks and their propagation, the construction of the concrete plate on the roadbed is carried out by dividing the road (roadbed) into a certain span in the traveling direction of the vehicle. Has formed joints.
However, since the presence of joints has been one of the factors that hinder the running stability of vehicles, in recent years, continuous reinforced concrete pavements without joints have become widespread.

In continuous reinforced concrete pavement, support spacers are arranged on the roadbed, a number of reinforcing bars (transverse reinforcing bars) are arranged in parallel on the supporting spacers, and a number of main reinforcing bars (longitudinal reinforcing bars) are further arranged on the distributing bars. After placing them in parallel, it is done by placing concrete. These many reinforcing bars and main bars constitute a reinforcing steel material for concrete reinforcement.
The above-mentioned main reinforcing bars are arranged along the traveling direction of the vehicle, and the distribution reinforcing bars are arranged obliquely intersecting with the main reinforcing bars, so that the reinforcing steel material for concrete reinforcement is formed in a mesh shape.

The above-mentioned many force distribution bars need to be arranged on the support spacer so as to have the same pitch in the vehicle traveling direction (longitudinal direction of the main bars) and the same inclination angle with respect to the main bars. It took time, the work efficiency was poor and the work load was high. In addition, since it is necessary to arrange a large number of main bars on the power distribution bars so as to have the same pitch in the width direction of the road, it takes time for the work, and the work efficiency is low and the work load is high.
Therefore, for example, as disclosed in Patent Documents 1 and 2, a reinforcing steel material for concrete reinforcement in which a plurality of reinforcing bars (lateral bars) are obliquely connected (welded) to a plurality of main bars (vertical bars) in advance. Proposed. This eliminates the need to arrange the distribution bars so as to have the same pitch and the same inclination angle at the work site.

JP 2017-74605 A JP 2017-75492 A

However, a concrete reinforcing bar consisting of multiple reinforcing bars and multiple main bars, which weighs several hundred kg, must be carried by the operator when placing it on the support spacer. However, it was necessary to use a crane (heavy equipment) or a dedicated device.
For this reason, there has been a problem that it is difficult to place a reinforcing bar for concrete reinforcement in which main bars and distribution bars are integrated in a place where the crane cannot enter or where the crane boom cannot tilt, for example, in a tunnel.

  The present invention has been made in view of such circumstances, and provides a reinforcing bar for concrete reinforcement that can reduce the work load more than before and can be arranged efficiently, a reinforcing bar arrangement method using the same, and a manufacturing method of the reinforcing steel for concrete reinforcement. The purpose is to provide.

The reinforcing steel for reinforcing concrete according to the first aspect of the present invention, which is used for continuous reinforced concrete pavement, has a large number of parallel bars arranged in parallel and a large number of parallel bars arranged obliquely with respect to the main bars. In the reinforcing steel for reinforcing concrete, which is formed in a mesh shape with the reinforcement,
A plurality of the reinforcing bars arranged obliquely in parallel so that the end portions thereof are along the longitudinal direction of the main reinforcing bars are connected and integrated by the first auxiliary reinforcing bars crossing each of the reinforcing bars, and the unit reinforcing bars It was.

  In the reinforcing bar for concrete reinforcement according to the first aspect of the present invention, a plurality of the reinforcing bars constituting the unit reinforcing member are connected by a plurality of the first auxiliary bars, and each of the first auxiliary bars is connected to the first reinforcing bar. It is good to arrange | position in parallel with the space | interval in the longitudinal direction of a reinforcement.

  In the reinforcing steel member for concrete reinforcement according to the first aspect of the invention, it is preferable that the first auxiliary bars are arranged orthogonally to the distribution bars.

  In the reinforcing bar for reinforcing concrete according to the first invention, it is preferable that the number of the reinforcing bars constituting the unit reinforcing bars is 3 or more and 10 or less.

The bar arrangement method using the reinforcing steel material for concrete reinforcement according to the second invention in line with the above object is a bar arrangement method using the reinforcing steel material for concrete reinforcement according to the first invention,
A large number of support spacers are arranged on the roadbed, a large number of the unit reinforcing bars are arranged on the support spacers, and a large number of the main reinforcing bars are arranged on the unit reinforcing bars.

The reinforcing steel material for concrete reinforcement according to the third aspect of the present invention, which is used for continuous reinforced concrete pavement, has a large number of parallel bars arranged in parallel and a large number of parallel bars arranged obliquely with respect to the main bars. In the reinforcing steel for reinforcing concrete, which is formed in a mesh shape with the reinforcement,
A plurality of the main bars arranged obliquely in parallel so that the end portions thereof are along the longitudinal direction of the power distribution bars are connected and integrated by second auxiliary bars crossing the main bars to form unit main bars.

  In the reinforcing bar for concrete reinforcement according to a third aspect of the invention, the plurality of main bars constituting the unit main bar material are connected by the plurality of second auxiliary bars, and each second auxiliary bar is in the longitudinal direction of the main bar. It is good to arrange | position in parallel at intervals.

  In the reinforcing steel member for concrete reinforcement according to the third aspect of the invention, it is preferable that the second auxiliary bar is arranged orthogonal to the main bar.

  In the reinforcing steel for reinforcing concrete according to the third invention, the number of the main reinforcing bars constituting the unit main reinforcing bars is preferably 3 or more and 10 or less.

A bar arrangement method using the reinforcing steel material for concrete reinforcement according to the fourth invention according to the above object is a bar arrangement method using the reinforcing steel material for concrete reinforcement according to the third invention,
A large number of support spacers are arranged on the roadbed, a large number of the reinforcing bars are arranged on the support spacers, and a large number of the unit main reinforcements are arranged on the distributing bars.

A reinforcing steel material for concrete reinforcement according to a fifth aspect of the present invention that meets the above-mentioned object is used for continuous reinforced concrete pavement, and has a large number of parallel bars arranged in parallel and a large number of parallel bars arranged obliquely with respect to the main bars. In the reinforcing steel for reinforcing concrete, which is formed in a mesh shape with the reinforcement,
A plurality of the reinforcing bars arranged obliquely in parallel so that the end portions thereof are along the longitudinal direction of the main reinforcing bars are connected and integrated by the first auxiliary reinforcing bars crossing each of the reinforcing bars, and the unit reinforcing bars age,
A plurality of the main bars arranged obliquely in parallel so that the end portions thereof are along the longitudinal direction of the power distribution bars are connected and integrated by second auxiliary bars crossing the main bars to form unit main bars.

The bar arrangement method using the reinforcing steel material for concrete reinforcement according to the sixth aspect of the invention that meets the above object is a bar arrangement method using the reinforcing steel material for concrete reinforcement according to the fifth invention,
A large number of support spacers are disposed on the roadbed, a large number of the unit reinforcing bars are disposed on the support spacers, and a large number of the unit main reinforcing bars are disposed on the unit reinforcing bars.
In addition, in the bar arrangement method using the reinforcing bar material for concrete reinforcement according to the sixth invention according to the above object, the unit reinforcing bar material for the reinforcing steel material for concrete reinforcement according to the first invention and the third invention invention It is possible to use a unit main reinforcement of a reinforcing steel for reinforcing concrete.

The method for manufacturing a reinforcing steel member for concrete reinforcement according to the seventh aspect of the present invention, which is used for continuous reinforced concrete pavement, is arranged in parallel so that a large number of parallel bars are arranged in parallel and obliquely intersecting the main bars. In a method of manufacturing a reinforcing steel material for concrete reinforcement formed in a mesh shape with a number of reinforcing bars,
A plurality of the reinforcing bars are arranged obliquely in parallel so that the end portions thereof are along the longitudinal direction of the main reinforcing bars, and the first auxiliary muscles are arranged so as to cross the distributing bars, so that the plurality of the reinforcing bars are arranged. The first auxiliary bar is attached and fixed and integrated into a unit bar arrangement material.

In the method for manufacturing a reinforcing bar material for concrete reinforcement according to the seventh aspect of the invention, a plurality of the reinforcing bars constituting the unit reinforcing bars are arranged in parallel at intervals in the longitudinal direction of the reinforcing bars. It is preferable that the first auxiliary muscle is attached and fixed.
Here, the unit bar arrangement material arranges the first auxiliary bars in a state orthogonal to the respective bar arrangement bars while moving the plurality of bar arrangement bars in the longitudinal direction thereof. Preferably, the first auxiliary bars are sequentially welded.

A method for manufacturing a reinforcing steel member for concrete reinforcement according to an eighth aspect of the present invention, which is used for continuous reinforced concrete pavement, is arranged in parallel so as to obliquely intersect a number of main bars arranged in parallel and the main bars. In a method of manufacturing a reinforcing steel material for concrete reinforcement formed in a mesh shape with a number of reinforcing bars,
A plurality of the main bars are arranged obliquely in parallel so that the end portions thereof are along the longitudinal direction of the force distribution bars, and a second auxiliary bar is arranged to cross the main bars, and the second main bars are arranged on the plurality of main bars. Auxiliary reinforcement is attached and fixed and integrated into a unit main reinforcement.

In the method for manufacturing a reinforcing bar for concrete reinforcement according to an eighth aspect of the present invention, a plurality of the second auxiliary members, wherein the plurality of main reinforcing bars constituting the unit main reinforcing bars are arranged in parallel at intervals in the longitudinal direction of the main reinforcing bars. It is better to fix it with a streak.
Here, the unit main reinforcing material is arranged such that each of the second auxiliary muscles is arranged orthogonal to each of the main reinforcing bars while moving the plurality of main reinforcing bars in the longitudinal direction thereof, and each of the second auxiliary reinforcing elements is arranged on each of the main reinforcing bars. Preferably, the streaks are formed by welding sequentially.

Reinforcing bars for concrete reinforcement according to the first and fifth inventions, reinforcing methods using the reinforcing steel members for concrete reinforcing according to the second and sixth inventions, and reinforcing bars for concrete reinforcement according to the seventh invention The material manufacturing method is a unit in which a plurality of force distribution bars arranged obliquely in parallel so that the end portions thereof are along the longitudinal direction of the main bars are connected and integrated by the first auxiliary bars crossing the force distribution bars. Since it is made of reinforcing bars, it is not necessary to arrange a large number of reinforcing bars on the support spacer so that they have the same pitch and the same inclination angle as in the conventional case. It can be improved and the work load can be reduced.
Reinforcing bars for concrete reinforcement according to the third and fifth inventions, reinforcing methods using the reinforcing steel members for concrete reinforcing according to the fourth and sixth inventions, and reinforcing bars for concrete reinforcement according to the eighth invention In the method of manufacturing a material, a plurality of main bars arranged obliquely in parallel so that the end portions thereof are along the longitudinal direction of the reinforcing bars are connected and integrated by a second auxiliary bar crossing each main bar to unit unit main bars Therefore, as in the past, it is not necessary to arrange a large number of main bars on the power distribution bars so as to have the same pitch, and the work time can be shortened, the work efficiency can be improved and the work load can be reduced. .
In particular, only a plurality of reinforcement bars constituting the unit reinforcement are integrated and separated from the main reinforcement, and / or only a plurality of principal reinforcements constituting the unit principal reinforcement are integrated and separated from the distribution reinforcement. Therefore, the weight can be reduced as compared with the case where the main bar and the distribution bar are integrated. For this reason, for example, it becomes possible for the operator to carry it, and the reinforcing steel material for concrete reinforcement can be arranged without being affected by the working environment.

Here, in the case where the first auxiliary muscles are arranged in a state orthogonal to the force distribution muscles, for example, the plurality of force distribution muscles are moved in the longitudinal direction while being orthogonal to the longitudinal direction (movement direction) of the force distribution muscles. Since the first auxiliary bars can be welded to the respective reinforcing bars by the plurality of electrodes arranged in the direction, the multiple distributing bars can be integrated without using a specially configured welding machine.
Further, when the second auxiliary muscle is arranged in a state orthogonal to the main muscle, for example, a plurality of main muscles are moved in the longitudinal direction while a plurality of the main muscles are arranged in a direction orthogonal to the longitudinal direction (movement direction) of the main muscle. Since the second auxiliary bar can be welded to each main bar by the electrode, a plurality of main bars can be integrated without using a welding machine having a special configuration.

(A) is a partially omitted plan view of the reinforcing steel material for concrete reinforcement according to the first embodiment of the present invention, and (B) is an enlarged plan view of the reinforcing bar shown in (A). (A) is a top view which shows the arrangement position of the support spacer which applies the reinforcement arrangement | positioning method using the reinforcing bar material for concrete reinforcement which concerns on the 1st Embodiment of this invention, (B) is the support spacer shown to (A) It is a top view of the reinforcing bar material for concrete reinforcement arrange | positioned on the top. (A), (B) is explanatory drawing of the manufacturing method of the reinforcing steel for concrete reinforcement which concerns on the 1st Embodiment of this invention, respectively. (A) is a top view which shows the arrangement position of the support spacer which applies the bar arrangement method using the reinforcing bar material for concrete reinforcement which concerns on a modification, (B) is the concrete reinforcement arrange | positioned on the support spacer shown to (A) It is a top view of a reinforcing steel material. (A) is a partially omitted plan view of a reinforcing steel material for concrete reinforcement according to a second embodiment of the present invention, and (B) is an enlarged plan view of the main reinforcement shown in (A).

Next, embodiments of the present invention will be described with reference to the accompanying drawings for understanding of the present invention.
As shown in FIG. 1 (A) and FIG. 2 (B), a concrete reinforcing steel bar 10 (hereinafter also simply referred to as a reinforcing steel bar) 10 according to the first embodiment of the present invention is used for paving a road. Used for continuous reinforced concrete pavement when performing, crossing a number of main bars (also called longitudinal bars) 11 and a number of distribution bars (also called horizontal bars, cross bars, cross bars or diagonal bars) 12 Thus, it is formed in a mesh shape, and the work load can be reduced as compared with the conventional case, and can be arranged efficiently. FIG. 1A shows a part of a road paved continuously in the traveling direction of the vehicle (the same applies to FIGS. 2A, 2B, 4A, and 4B described later). For convenience of explanation, only some of the main muscles 11 are shown (the same applies to FIGS. 2B and 4B). This will be described in detail below.

As shown in FIGS. 2 (A) and 2 (B), when the reinforcing steel member 10 for concrete reinforcement is arranged, the support spacer 14 is placed on the roadbed (for example, the compacted ground) 13 in the traveling direction of the vehicle. Then, the reinforcing steel member 10 for concrete reinforcement is placed on the support spacer 14. The concrete reinforcing steel bar 10 and the support spacer 14 are bound by a wire, a band, or the like.
Thereby, the reinforcing steel material 10 for concrete reinforcement can be supported to the preset height.
In addition, the structure of a support spacer will not be specifically limited if it can support the reinforcing steel material 10 for concrete reinforcement, For example, the thing of the following structures can be used.

・ As described in Japanese Patent Application Laid-Open No. 2011-184969, one upper straight bar material using a reinforcing bar is arranged at the upper part, and two lower straight bar members using a reinforcing bar are arranged at a predetermined interval at the lower part. The upper straight bar material at the top and the lower straight bar material at the lower part are manufactured by welding and fixing with two diagonal support wires formed in a zigzag shape by bending the reinforcing bars.
-Manufactured by welding and fixing upper straight bars using reinforcing bars on top of a plurality of inverted U-shaped support members arranged at a predetermined interval.
A structure in which three or four legs are provided and arranged at the intersection of the main reinforcing bar 11 and the reinforcing bar 12 constituting the reinforcing steel bar 10 for reinforcement.

As shown in FIG. 1 (A) and FIG. 2 (B), the concrete reinforcing steel bar material 10 includes a large number of main bars 11 arranged in the running direction of the vehicle, and a large number of narrower diameters than the main bars 11. It is comprised with the power distribution muscle 12. FIG. The diameter of the main muscle 11 is, for example, about D16 to D19, and the diameter of the distribution bar 12 is, for example, about D13 to D16.
A large number of main bars 11 are arranged along the traveling direction of the vehicle, and are arranged in parallel with a gap in a direction orthogonal to the traveling direction of the vehicle (hereinafter also referred to as the width direction of the road). . In addition, a large number of the distribution muscles 12 are arranged so as to cross (cross) the large number of main bars 11 diagonally (obliquely with respect to the traveling direction of the vehicle), and the same pitch is set in the longitudinal direction of the main bars 11. It is arranged in parallel (with the same pitch in the traveling direction of the vehicle).

As described above, the reason why the reinforcing bars 12 of the reinforcing steel bars 10 for concrete reinforcement are crossed in a range not orthogonal to the main bars 11 is that crack generation and propagation to the paved road can be suppressed. It is.
An angle θ1 formed by the main muscle 11 (vehicle traveling direction) and the distribution muscle 12 is a preset angle (40 degrees or more and 80 degrees or less (here, 60 degrees)) or 100 degrees or more and 140 degrees or less. (Within range).

When assembling a reinforcing steel bar for concrete reinforcement, a large number of main bars are arranged on a large number of distribution bars and crossed, and the crossing (contacting) portion is fixed with a binding wire (may be welded) to form a mesh. I have to.
At this time, it is necessary to arrange each of the distribution muscles so that they have the same pitch in the longitudinal direction of the main reinforcement and the same inclination angle with respect to the longitudinal direction of the principal reinforcement. It takes time to work, and the work efficiency is low and the work load is also high.
Therefore, as shown in FIGS. 1A and 1B, a plurality of reinforcing bars 12 are connected and integrated by a first auxiliary bar 15 to form a unit reinforcing material (also referred to as a reinforcing material unit) 16. .

In this unit reinforcing material 16, the plurality of reinforcing bars 12 are arranged in parallel obliquely so that the end portions thereof are along the longitudinal direction of the main reinforcement 11 (the state in which both ends are aligned in the longitudinal direction of the main reinforcement 11 (plan view). In the parallelogram shape)), the first reinforcing bars 15 arranged in a crossing state are connected to and integrated with each of the distributing bars 12 below each of the distributing bars 12. The diameter of the first auxiliary muscle 15 is equal to or narrower than that of the distribution muscle 12 and is, for example, about D10 to D13.
The number of the reinforcing bars 12 connected to the first auxiliary reinforcing bars 15 (constituting the unit reinforcing bars 16) is, for example, 3 or more considering the weight (about several tens of kg) that can be conveyed by the operator. Although it is set within the range below (here, 5), it can be variously changed in consideration of the length, pitch, and the like of the distribution bar. In addition, each distribution muscle 12 is substantially the same length, The average length is about 2-10 m (further, a minimum is 4 m and an upper limit is 7 m), for example.

The plurality of reinforcing bars 12 constituting the unit reinforcing material 16 are connected by a plurality of first auxiliary bars 15.
The number of the first auxiliary muscles 15 that connect the distribution muscles 12 is five here, but is not particularly limited as long as a plurality of distribution muscles 12 can be connected (integrated). A plurality of the above may be used (the upper limit is about 10 considering the weight).
If the arrangement positions of the plurality of first auxiliary muscles 15 intersect with the plurality of distribution muscles 12 (angle formed by the distribution muscle 12 and the first auxiliary muscle 15: more than 0 degrees and less than 180 degrees), Although not particularly limited, in order to facilitate the manufacture, each first auxiliary muscle 15 is in an orthogonal state (90 degrees formed) with respect to each of the distribution muscles 12 and each of the distribution muscles 12. It is good to arrange | position in parallel at intervals in the longitudinal direction. Hereinafter, the manufacturing method of the reinforcing steel material 10 for concrete reinforcement (unit reinforcement material 16) is demonstrated.

First, as shown in FIGS. 3A and 3B, a plurality of reinforcing bars 12 are arranged on the work table 18 of the welding machine 17 and the end portions thereof are arranged along the longitudinal direction of the main reinforcing bars 11 when the bars are arranged. So as to be parallel to each other diagonally (arranged so as to form a parallelogram in plan view). Here, the arrangement pitch of the plurality of force distribution bars 12 is matched with the pitch arranged in the longitudinal direction of the main reinforcement 11, and the inclination angle of each force distribution line 12 is matched with the angle θ1 formed as described above.
Next, one first auxiliary bar 15 is arranged in an orthogonal state on the plurality of force distribution bars 12 and fixed by welding.

Specifically, from the supply unit 19 that houses the plurality of first auxiliary muscles 15, one first auxiliary muscle 15 is rolled down onto the plurality of distribution muscles 12, and each of the first auxiliary muscles 15 It arrange | positions so that it may become orthogonal to the force distribution muscle 12, and the crossing part of the 1st auxiliary muscle 15 and the force distribution muscle 12 is pinched | interposed with the electrode part 20 of the fixed side, and the electrode part 21 which can be raised-lowered with a cylinder. .
Then, spot welding is performed at the intersection of the distribution bar 12 and the first auxiliary bar 15. Note that spot welding is performed by, for example, the first auxiliary muscle 15 using a plurality of electrode portions 20 and 21 arranged in the longitudinal direction of the first auxiliary reinforcement 15 (direction orthogonal to the longitudinal direction of the force distribution reinforcement 12). Although it can implement sequentially in each location of the longitudinal direction of this, it can also implement simultaneously in multiple locations.

Subsequently, the plurality of force distribution bars 12 to which the first first auxiliary muscle 15 is attached and fixed are integrated with each other by a predetermined distance in the longitudinal direction (up to the position where the second first auxiliary muscle 15 is attached and fixed). In the same manner as described above, the second first auxiliary muscle 15 is arranged so as to be orthogonal to each of the distribution muscles 12, and the intersection of the distribution muscles 12 and the first auxiliary muscles 15. Spot weld the part.
By repeating the above-described method by the number of the first auxiliary muscles 15, a plurality of force distribution muscles 12 can be integrated.
In this way, the first auxiliary muscles 15 arranged in parallel at intervals in the longitudinal direction of the force distribution muscles 12 while the plurality of force distribution muscles 12 are moved in the longitudinal direction thereof. In order to manufacture and fix the unit reinforcing bars 16, a welding machine having a special configuration is unnecessary.
The unit reinforcing material 16 is, for example, a plurality of reinforcing bars in a rectangular shape (rectangular shape) in plan view (so that the end portions are aligned in a direction perpendicular to the longitudinal direction of the reinforcing bars). ) In the arranged state, after connecting and integrating with the first auxiliary muscles arranged in a crossing state with each of the force distribution bars, the length of each force distribution muscle is formed so as to have the shape (parallelogram shape) shown in FIG. It can also be obtained by cutting one or both directions.

Next, a bar arrangement method using the concrete reinforcing steel bar 10 according to the first embodiment of the present invention will be described.
First, as shown in FIG. 2A, a large number of support spacers 14 are arranged on the roadbed 13.
A large number of support spacers 14 are arranged in parallel on the roadbed 13 so as to intersect with the main bars 11 in a range not orthogonal to the main bars 11 in plan view. Thereby, for example, even if the distribution bar 12 tries to bend, each support spacer 14 can support the reinforcing steel member 10 for concrete reinforcement via the main bar 11 having higher strength than the distribution bar 12.

Therefore, as shown in FIG. 2B, the angle θ2 formed by the support spacer 14 and the main bar 11 is set within a range of more than 0 degree and less than 180 degrees (except 90 degrees) (here, 150 degrees). However, in consideration of the support of the reinforcing steel 10 for concrete reinforcement described above and the concrete placing direction (vehicle traveling direction) described later, it is within the range of 20 degrees to 160 degrees (except 90 degrees). It is preferable to set by.
In addition, since each support spacer 14 is arrange | positioned so that it may cross | intersect not only the main reinforcement 11 but the distribution bar 12 in planar view, each support spacer 14 has not only the main reinforcement 11 but the distribution line 12 as well. I can support it.

In addition, a large number of support spacers 14 are arranged in parallel on the roadbed 13 with intervals, but may not be parallel (not parallel) as long as the support spacers 14 do not intersect each other.
The installation interval of each support spacer 14 in the traveling direction of the vehicle can be set empirically according to, for example, the amount of bending when an operator is placed on the concrete reinforcing steel bar 10, but the strength is calculated. Can also be set.
Here, the multiple support spacers 14 are arranged at the same pitch, but may be arranged at different pitches.

Further, as shown in FIGS. 2 (A) and 2 (B), a large number of support spacers 14 are arranged with their longitudinal ends in contact with each other, but in FIGS. 4 (A) and 4 (B). As shown, the ends of the support spacers 14a may be arranged in a straight line with a gap therebetween (may be shifted). Furthermore, the support spacers 14a are also arranged on both sides in the width direction of the road with an interval along the traveling direction of the vehicle.
Since the above-mentioned support spacers have various lengths, one support spacer is cut to adjust the length according to the length and the width of the road to be paved, and this is used as the support spacer. It can also be used.

Subsequently, a unit reinforcing bar 16 in which a predetermined number of distributing bars 12 are connected and integrated on the support spacers 14 by the first auxiliary bars 15, and the first auxiliary bars 15 are on the lower side. In such a manner, a large number of first auxiliary bars 15 are arranged so as not to contact the support spacer 14 (see FIG. 2B).
Specifically, the unit reinforcing bars 16 shown in FIG. 1B are sequentially arranged along the traveling direction of the vehicle as shown in FIG. Here, the unit bar arrangement members 16 are sequentially arranged only along the traveling direction of the vehicle. For example, the unit bar arrangement members 16 include two or more unit bar arrangement members 16 according to the width of the unit bar arrangement member 16 or the road width. It can also be arranged along the width direction of the road. In this case, the end portions of the adjacent unit reinforcing bars 16 may be in contact with each other, or may be in an overlapping state.
And as shown to FIG. 1 (A) and FIG. 2 (B), many main bars 11 are arrange | positioned on the unit bar arrangement material 16. As shown in FIG.

After the concrete reinforcing steel bar 10 is arranged on the roadbed 13 via the numerous support spacers 14 by the above method, the concrete is moved along the vehicle traveling direction from one end side to the other end side in the vehicle traveling direction. Perform placement. In addition, since each support spacer 14 is arrange | positioned diagonally with respect to the flow of the concrete pumped, concrete can be laid, suppressing the fall of each support spacer 14, and also preventing it.
When the curing of the concrete is finished, the road pavement may be finished. However, the asphalt pavement may be further performed on the concrete to finish the road pavement.

Next, with reference to FIGS. 5 (A) and 5 (B), a concrete reinforcing bar material (hereinafter also simply referred to as a reinforcing bar material) 30 according to a second embodiment of the present invention will be described. Since the basic configuration is substantially the same as the above-described concrete reinforcing steel bar 10 according to the first embodiment of the present invention, the same members are denoted by the same reference numerals, and detailed description thereof is omitted.
The concrete reinforcing bar 30 is used for continuous reinforced concrete pavement when pavement on a road, and is formed in a mesh shape by crossing a number of main bars (also called longitudinal bars) 31 and a number of strength bars 12a. It has been done. In FIG. 5A, a part of the road paved continuously in the traveling direction of the vehicle is illustrated, and for convenience of explanation, only a part of the main bars 31 is illustrated.

In use, a large number of main bars are arranged along the traveling direction of the vehicle, and have the same pitch with an interval in the direction perpendicular to the traveling direction of the vehicle (the width direction of the road). Are arranged in parallel (with the same pitch in the width direction of the road).
As described above, the main bars need to be arranged so as to have the same pitch in the width direction of the road. However, this work takes time, and the work efficiency is low and the work load is also high.
Therefore, a plurality of main bars 31 are connected and integrated by the second auxiliary bars 32 to form unit main bars 33 (also referred to as main bar units).

This unit main reinforcing material 33 is a state in which a plurality of main reinforcing bars 31 (the diameters of which are, for example, about D16 to D19) are arranged obliquely in parallel so that the end portions thereof are along the longitudinal direction of the force distribution reinforcing bars 12a Are connected to each other by a second auxiliary muscle 32 arranged in a crossing state with each main muscle 31 below each main muscle 31. It has become. The diameter of the second auxiliary muscle 32 is narrower than the main muscle 31 and is, for example, about D13.
As described above, since the plurality of main reinforcing bars 31 are arranged obliquely in parallel so that the end portions thereof are along the longitudinal direction of the distributing force 12a, the unit main reinforcing bars 33 are disposed on the plurality of distributing forces 12a. In addition, both end portions of each main reinforcing bar 31 can be reliably arranged on the distribution bar 12a, and the protruding width from the distribution bar 12a can be made substantially uniform.

The plurality of main bars 31 constituting the unit main bar material 33 are connected by a plurality of second auxiliary bars 32.
The number of main bars 31 constituting the unit main bar material 33 is set within a range of 3 to 10 (here, 6) in consideration of, for example, a weight (about several tens of kg) that can be transported by an operator. However, various changes can be made in consideration of the length and pitch of the main muscle. Each main muscle 31 has substantially the same length.
The number of the second auxiliary muscles 32 that connect the main muscles 31 is four here, but is not particularly limited as long as a plurality of main muscles 31 can be connected (integrated). However, the upper limit may be about 10 considering the weight.

The arrangement positions of the plurality of second auxiliary muscles 32 are particularly limited as long as they intersect with the plurality of main muscles 31 (the angle between the main muscle 31 and the second auxiliary muscle 32: more than 0 degrees and less than 180 degrees). Although it is not a thing, in order to manufacture easily, each 2nd auxiliary | assistant reinforcement | strengthening bar | burr 32 is made in the orthogonal state (angle 90 degree | times made) with respect to each principal muscle 31, and spaced apart in the longitudinal direction of each principal muscle 31 It is better to arrange them in parallel.
This is because of the same reason as that of the unit reinforcing bars 16 described above, that is, it is not necessary to use a welding machine having a special configuration when the unit main reinforcing bars 33 are manufactured. In addition, since the manufacturing method of the unit main reinforcement 33 is substantially the same as the unit reinforcement 16 mentioned above, it demonstrates easily below (refer FIG. 3 (A), (B)).

First, the plurality of main bars 31 are arranged in parallel so that the end portions thereof are arranged along the longitudinal direction of the force distribution bars 12a when the bars are arranged (arranged so as to form a parallelogram in plan view). Here, the arrangement pitch of the plurality of main bars 31 is adjusted to the pitch arranged in the width direction of the road, and the angle formed between each main bar 31 and each of the distribution bars 12a is the same as that of the main bar 11 and the distribution bar 12 described above. Is set to the angle θ1 (in the range of 40 degrees to 80 degrees (here, 60 degrees) or 100 degrees to 140 degrees).
And while moving the some main reinforcement | strengthening 31 to the longitudinal direction integrally, each 2nd auxiliary | assistant arrange | positioned in parallel with the space | interval in the longitudinal direction of the principal reinforcement 31 on the some principal reinforcement 31 at intervals. The unit main reinforcing bars 33 are obtained by sequentially welding and fixing the bars 32 to the respective main bars 31.
In addition, the unit main reinforcing material 33 is, for example, in a state where a plurality of main reinforcing bars are arranged so as to form a right-angled quadrangle (rectangular shape) in a plan view (ends are aligned in a direction perpendicular to the longitudinal direction of the main reinforcing bars) After connecting and integrating with the second auxiliary muscles arranged in an intersecting state with each principal muscle, one side in the longitudinal direction of each principal muscle so as to have the shape shown in FIGS. 5A and 5B (parallelogram shape) Alternatively, it can be obtained by cutting both sides.

When arranging the unit main reinforcing bars 33 on a large number of the reinforcing bars 12a, the plurality of main bars 31 constituting the unit main reinforcing bars 33 need to be in direct contact with the distributing bars 12a. 32 should not contact the distribution bar 12a (the second auxiliary bar 32 needs to be arranged between the distribution bars 12a adjacent to each other in the traveling direction of the vehicle). This is because the second auxiliary muscle 32 is located below the plurality of main muscles 31 when the unit main reinforcement 33 is used.
For this reason, if the length of the main muscle 31 is too long, for example, the main muscle 31 is arranged due to an error in the attachment position of the second auxiliary muscle 32 to the plurality of main muscles 31 or an error in the arrangement position of the force distribution muscle 12a. Since there is a possibility that the force muscle 12a cannot be directly contacted, the average length of each main muscle 31 is preferably longer than the force distribution muscle 12a, for example, about 4 to 12 m. In addition, even if the number of the main reinforcing bars 31 constituting the unit main reinforcing bar 33 is too large, the length of the second auxiliary reinforcing bars 32 may be increased and come into contact with the distributing muscles 12a. It is better to set it to 10 or more.

Here, in the case where a plurality of second auxiliary bars are used for the unit main reinforcement, if the plurality of main reinforcements can be connected (integrated), the second shorter than the width of the unit main reinforcement (the direction perpendicular to the longitudinal direction of the main reinforcement). Can also be used (one second auxiliary muscle can be attached and not fixed to all main muscles).
Specifically, for example, when four second auxiliary muscles are used, the main principal bars from one side in the width direction of the unit main reinforcement to the fourth one are connected by the two second auxiliary reinforcements, and the unit main reinforcement A plurality of main bars are integrated by connecting the main bars from the other side in the width direction to the fourth main bar with the other two second auxiliary bars. At this time, the two second auxiliary muscles connected from one side in the width direction of the unit main reinforcement and the other two second auxiliary muscles connected from the other side in the width direction are alternately arranged in the longitudinal direction of the main reinforcement. It is good to arrange.
In addition, two or more second auxiliary bars can be arranged at intervals in the width direction of the unit main reinforcing bars (the same applies to the unit reinforcing bars described above).

Next, a bar arrangement method using the reinforcing concrete member 30 for concrete reinforcement according to the second embodiment of the present invention will be described, which is substantially the same as the bar arrangement method using the reinforcing steel member 10 for concrete reinforcement described above. A brief description will be given below.
First, a large number of support spacers (not shown) are arranged on the roadbed 13 (see FIG. 2A).
Subsequently, as shown in FIG. 5A, a large number of distribution bars 12a are arranged on the support spacer.
Then, a unit main reinforcing material 33 in which a predetermined number of main muscles 31 are connected and integrated on the distributing muscles 12a by the second auxiliary muscles 32 so that the second auxiliary muscles 32 are on the lower side, and A large number of the second auxiliary muscles 32 are arranged so as not to come into contact with the distributing muscles 12a.

Specifically, as shown in FIG. 5 (A), the unit main reinforcement 33 shown in FIG. 5 (B) is aligned with the vehicle traveling direction so that the longitudinal direction of the main reinforcement 31 matches the vehicle traveling direction and the width direction of the road. It arranges sequentially along. In this case, the end portions of the unit main reinforcing bars 33 adjacent to each other in the traveling direction of the vehicle overlap each other and are placed on the same distribution bar 12a.
At this time, the overlapping portions of the unit main reinforcing bars 33 adjacent to each other in the traveling direction of the vehicle are arranged obliquely with respect to the traveling direction of the vehicle. It can suppress that it arises in the shape of a straight line over the width direction.
After the concrete reinforcing bars 30 are arranged on the roadbed 13 via a number of support spacers by the above method, the concrete is struck from the one end side to the other end side in the vehicle traveling direction along the vehicle traveling direction. Set up.

In addition, the reinforcing bar for concrete reinforcement can also be constituted by the unit reinforcing bar 16 of the reinforcing bar 10 for concrete reinforcing and the unit main reinforcing bar 33 of the reinforcing bar 30 for concrete reinforcement.
In this case, the bar arrangement method using the reinforcing steel material for concrete reinforcement is as follows.
First, a large number of support spacers (not shown) are arranged on the roadbed (see FIG. 2A).
Subsequently, a large number of unit reinforcing bars 16 composed of the reinforcing bars 12 connected and integrated by the first auxiliary bars 15 are arranged on the support spacer (see FIG. 2B). A large number of unit main reinforcing bars 33 composed of main bars 31 connected and integrated by the second auxiliary bars 32 are arranged on the top 16 (see FIG. 5A).
After the concrete reinforcing bars are arranged on the roadbed 13 through a number of support spacers by the above method, the concrete is placed along the vehicle traveling direction from one end side to the other end side in the vehicle traveling direction. I do.

As described above, the plurality of strength reinforcing bars 12 constituting the unit reinforcing material 16 are preliminarily set to the same pitch in the traveling direction of the vehicle by the first auxiliary reinforcement 15 and the same inclination angle with respect to the main reinforcement 11. As in the past, a large number of force distribution bars are arranged on the support spacer so as to have the same pitch in the vehicle traveling direction and the same inclination angle with respect to the main bars. There is no need to line up.
In addition, since the plurality of main bars 31 constituting the unit main bar material 33 are previously integrated by the second auxiliary bars 32 so as to have the same pitch in the width direction of the vehicle, a large number of main bars 31 as in the past are used. It is not necessary to arrange them on the power distribution line so as to have the same pitch in the width direction of the vehicle.
Therefore, according to the reinforcing bar for concrete reinforcement of the present invention, the bar arrangement method using the same, and the method for manufacturing the reinforcing bar for concrete reinforcement, the work load can be reduced and the arrangement can be efficiently performed.

As described above, the present invention has been described with reference to the embodiment. However, the present invention is not limited to the configuration described in the above embodiment, and the matters described in the scope of claims. Other embodiments and modifications conceivable within the scope are also included. For example, in some cases, a part or all of the above-described embodiments and modifications may be combined to configure the reinforcing steel for concrete reinforcement of the present invention, the reinforcing bar using the same, and the method for manufacturing the reinforcing steel for concrete reinforcing. It is included in the scope of rights of the present invention.
In the said embodiment, although the reinforcing bar material for concrete reinforcement of this invention and the bar arrangement method using the same were applied to the pavement of the road (especially highway) of the outdoors (outside the tunnel), these were demonstrated. The present invention is not limited to this, and can be applied to pavements such as railroad beds, bridges, runways and aprons of airfields, and the effect of the present invention is more effective when applied to road pavements in tunnels. Become prominent.

Moreover, in the said embodiment, although the case where the cross-section circular reinforcing bar was used as a 1st, 2nd auxiliary | assistant reinforcement was demonstrated, if several force distribution bars could be connected (integrated), and / or several There is no particular limitation as long as the main bars can be connected (integrated), and for example, a bar (including a plate) having a polygonal cross section (such as a square) can be used.
Furthermore, in the above-described embodiment, the case where the main bars and the distribution bars are arranged in parallel is described, but within a range where there is no problem in use as a reinforcing steel material for concrete reinforcement (for example, ± 5 degrees, Furthermore, it may be slightly deviated by ± 2 degrees (the same applies to the arrangement pitches of the main muscles and the distribution bars). Also, in the case where a plurality of force distribution muscles are connected by a plurality of first auxiliary muscles, the case where the first auxiliary muscles are arranged in parallel has been described. However, if the plurality of force distribution muscles can be integrated, they are non-parallel. The same may apply to the second auxiliary muscle that connects a plurality of main muscles.

In the above-described embodiment, all the reinforcing bars have substantially the same length, but may have different lengths depending on the condition of the roadbed. In this case, the plurality of force distribution bars are diagonally arranged in parallel so that only one end portion of the plurality of force distribution bars is along the longitudinal direction of the main reinforcement.
Moreover, in the said embodiment, although all the main reinforcements are made into substantially the same length, it can also be made into different length according to the condition of a roadbed. In this case, the plurality of main bars are arranged in parallel so that only one end of the plurality of main bars is along the longitudinal direction of the force distribution bars.

10: Reinforcing bar for concrete reinforcement, 11: Main reinforcement, 12, 12a: Power distribution, 13: Roadbed, 14, 14a: Support spacer, 15: First auxiliary reinforcement, 16: Unit reinforcement, 17: Welding machine , 18: Work table, 19: Supply unit, 20, 21: Electrode unit, 30: Reinforcing bar for concrete reinforcement, 31: Main reinforcing bar, 32: Second auxiliary reinforcing bar, 33: Unit main reinforcing bar

Claims (19)

Reinforcing bars for concrete reinforcement formed in a mesh shape with a large number of main bars that are used in continuous reinforced concrete pavement and arranged in parallel so as to cross diagonally with respect to the main bars ,
A plurality of the reinforcing bars arranged obliquely in parallel so that the end portions thereof are along the longitudinal direction of the main reinforcing bars are connected and integrated by the first auxiliary reinforcing bars crossing each of the reinforcing bars, and the unit reinforcing bars Reinforcement material for concrete reinforcement, characterized by   2. The reinforcing bar for concrete reinforcement according to claim 1, wherein a plurality of the reinforcing bars constituting the unit reinforcing member are connected by a plurality of the first auxiliary bars, and each of the first auxiliary bars is the power distribution member. A reinforcing bar for reinforcing concrete, characterized in that the reinforcing bars are arranged in parallel in the longitudinal direction of the bars.   3. The concrete reinforcing steel bar according to claim 1, wherein the first auxiliary bars are arranged in a state orthogonal to the force distribution bars. 4.   The reinforcing steel for reinforcing concrete according to any one of claims 1 to 3, wherein the number of the reinforcing bars constituting the unit reinforcing bars is 3 or more and 10 or less. Reinforcing bar material. A bar arrangement method using the reinforcing steel material for concrete reinforcement according to any one of claims 1 to 4,
A bar arrangement method comprising arranging a large number of support spacers on a roadbed, arranging a large number of the unit reinforcing bars on the support spacers, and arranging the main bars on the unit bar arrangement material. Reinforcing bars for concrete reinforcement formed in a mesh shape with a large number of main bars that are used in continuous reinforced concrete pavement and arranged in parallel so as to cross diagonally with respect to the main bars ,
A plurality of main bars arranged obliquely in parallel so that their end portions are along the longitudinal direction of the distribution bars are connected and integrated by second auxiliary bars crossing each main bar to form unit main bars. Reinforcement material for concrete reinforcement characterized by   The reinforcing bar for concrete reinforcement according to claim 6, wherein the plurality of main reinforcing bars constituting the unit main reinforcing bar are connected by a plurality of the second auxiliary reinforcing bars, and each of the second auxiliary reinforcing bars is in a longitudinal direction of the main reinforcing bars. Reinforcement material for concrete reinforcement, characterized by being arranged in parallel at intervals.   The reinforcing steel for concrete reinforcement according to claim 6 or 7, wherein the second auxiliary reinforcing bars are arranged orthogonal to the main reinforcing bars.   The reinforcing bar for concrete reinforcement according to any one of claims 6 to 8, wherein the number of the main reinforcing bars constituting the unit main reinforcing bar is 3 or more and 10 or less. . A bar arrangement method using the reinforcing steel material for concrete reinforcement according to any one of claims 6 to 9,
A bar arrangement method comprising arranging a large number of support spacers on a roadbed, arranging a number of the reinforcing bars on the support spacers, and arranging a large number of the unit main reinforcing bars on the force distribution bars. Reinforcing bars for concrete reinforcement formed in a mesh shape with a large number of main bars that are used in continuous reinforced concrete pavement and arranged in parallel so as to cross diagonally with respect to the main bars ,
A plurality of the reinforcing bars arranged obliquely in parallel so that the end portions thereof are along the longitudinal direction of the main reinforcing bars are connected and integrated by the first auxiliary reinforcing bars crossing each of the reinforcing bars, and the unit reinforcing bars age,
A plurality of main bars arranged obliquely in parallel so that their end portions are along the longitudinal direction of the distribution bars are connected and integrated by second auxiliary bars crossing each main bar to form unit main bars. Reinforcement material for concrete reinforcement characterized by A reinforcing method using the reinforcing steel for reinforcing concrete according to claim 11,
A bar arrangement method comprising arranging a large number of support spacers on a roadbed, arranging a large number of the unit reinforcing bars on the support spacers, and arranging a large number of the unit main reinforcements on the unit bar arrangement material. A reinforcing bar arrangement method using the concrete reinforcing bar material according to any one of claims 2 to 4 and the concrete reinforcing bar material according to any one of claims 7 to 9,
A bar arrangement method comprising arranging a large number of support spacers on a roadbed, arranging a large number of the unit reinforcing bars on the support spacers, and arranging a large number of the unit main reinforcements on the unit bar arrangement material. A reinforcement material for reinforcing concrete that is used in continuous reinforced concrete pavement and is formed in a mesh shape with a large number of main bars arranged in parallel and a number of reinforcing bars arranged in parallel so as to obliquely intersect the main bars. In the manufacturing method,
A plurality of the reinforcing bars are arranged obliquely in parallel so that the end portions thereof are along the longitudinal direction of the main reinforcing bars, and the first auxiliary muscles are arranged so as to cross the distributing bars, so that the plurality of the reinforcing bars are arranged. A method for producing a reinforcing bar material for concrete reinforcement, characterized in that the first auxiliary bar is attached and fixed and integrated into a unit reinforcing bar.   The method of manufacturing a reinforcing bar for concrete reinforcement according to claim 14, wherein a plurality of the reinforcing bars constituting the unit reinforcing bars are arranged in parallel in the longitudinal direction of the reinforcing bars. A method for producing a reinforcing steel material for concrete reinforcement, characterized in that the first reinforcing bar is attached and fixed.   16. The method of manufacturing a reinforcing bar for reinforcing concrete according to claim 15, wherein the unit reinforcing bar is configured to move the first auxiliary reinforcing bars to the respective reinforcing bars while moving the plurality of reinforcing bars in the longitudinal direction thereof. A method for producing a reinforcing steel material for concrete reinforcement, wherein the reinforcing bars are arranged in a state orthogonal to each other and are formed by sequentially welding the first auxiliary bars to the power distribution bars. A reinforcement material for reinforcing concrete that is used in continuous reinforced concrete pavement and is formed in a mesh shape with a large number of main bars arranged in parallel and a number of reinforcing bars arranged in parallel so as to obliquely intersect the main bars. In the manufacturing method,
A plurality of the main bars are arranged obliquely in parallel so that the end portions thereof are along the longitudinal direction of the force distribution bars, and a second auxiliary bar is arranged to cross the main bars, and the second main bars are arranged on the plurality of main bars. A method for producing a reinforcing steel material for reinforcing concrete, characterized in that an auxiliary reinforcement is attached and fixed and integrated into a unit main reinforcement.   The method of manufacturing a reinforcing bar for concrete reinforcement according to claim 17, wherein the plurality of second reinforcing bars in which the plurality of main bars constituting the unit main reinforcing bars are arranged in parallel with a space in the longitudinal direction of the main bars. A method for producing a reinforcing steel material for concrete reinforcement, characterized in that it is attached and fixed with   19. The method for manufacturing a reinforcing bar for reinforcing concrete according to claim 18, wherein the unit main reinforcing bars are arranged such that the second auxiliary reinforcing bars are orthogonal to the main reinforcing bars while moving the main reinforcing bars in the longitudinal direction. A method for manufacturing a reinforcing steel material for concrete reinforcement, wherein the second auxiliary bars are sequentially welded to the main bars.

Images