JP2948767B2 - Jointing jig and jointing method for concrete pavement - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an installation jig for joints formed at predetermined intervals in the length direction of a paving slab when paving concrete or the like.

[0002]

2. Description of the Related Art As is well known, in the case of concrete pavement, it is necessary to reduce stress caused by shrinkage / expansion of the pavement plate due to temperature change and stress caused by warpage due to a temperature difference between the surface and the bottom surface of the pavement plate. Further, joints are formed on the pavement plate at predetermined intervals in the length direction.

Conventionally, in order to construct joints in the case of concrete pavement, for example, as shown in FIGS.
First, an adjustment mortar 2 is provided on the upper surface of the roadbed 1 to be paved, and the mortar 2 supports the lower end of the joint material 3 made of elastite. Further, the reinforcing members 4 are staggered on both sides of the joint material 3. And the reinforcing bars 4 are inserted into the roadbed 1 to temporarily fix the joint material 3 substantially vertically, and then the concrete 5 is placed on the roadbed 1 on both sides of the joint material 3. Are joined to the upper end of the concrete 5 and the reinforcing bars 4 are pulled out before the concrete 5 is solidified.

[0004]

However, in the above-described joint construction method, in order to temporarily fix the joint material 3 vertically on the roadbed 1, the adjusting mortar 2 is provided or a large number of reinforcing bars 4 are inserted. , And furthermore, since the rebars 4... Have to be pulled out one by one after the concrete is cast, these operations are very troublesome.

In addition, when the concrete is poured after the joint material 3 is temporarily fixed, it is necessary to pay attention to the joint material 3, so that the workability is poor. In other words, the joint material 3 may be displaced from a predetermined position or may be damaged due to the casting pressure of the concrete 5 placed on both sides thereof.
It is necessary to pay attention to this, and when the joint material 3 is displaced by the casting pressure of the concrete, if the concrete is cast to the upper end of the joint material 3, the joint material 3 can be gripped. Therefore, it is difficult to correct the displacement. Furthermore, in order to prevent such displacement and breakage of the joint material 3, it is necessary to reduce the concrete casting speed in the vicinity of the joint material 3, and workability is also poor in this regard.

[0006] Further, in order to place the joint material 3 before the concrete is cast, when the concrete is poured, the joint material 3 is provided between the joint materials 3 and 3 provided at predetermined intervals in the longitudinal direction of the roadbed 1. It was necessary to cast concrete, which made it impossible to continuously cast concrete, resulting in poor workability.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a jointing jig and a jointing method for a concrete pavement capable of improving workability and workability during jointing. I have.

[0008]

In order to achieve the above object, a jointing jig according to a first aspect of the present invention comprises: a jointing jig body disposed in parallel to a width direction of a roadbed to be paved; A grip portion provided on an upper surface portion of the joint construction jig main body, and the joint construction jig main body is provided with an insertion portion which opens downward and into which the joint material is removably inserted. Things.

The joint construction jig main body has, for example, a section L
A pair of angle irons in a U-shape are arranged in parallel and spaced apart with one of them back to back, and further, a thin iron plate extending downward is fixed to each of the pieces arranged in parallel and spaced apart. Is an insertion portion that opens downward and into which the joint material is removably inserted. The width of the insertion portion, that is, the distance between the thin iron plates is set substantially equal to the thickness of the joint material. Further, the grip portion is, for example, constructed of a number of rebars which are provided between the other pieces of the pair of angle irons and connect the angle irons. The reinforcing bars are formed so as to protrude above the upper surface of the other piece of the angle iron, and are arranged at predetermined intervals in the longitudinal direction of the angle iron, so that an operator or the like can grip the iron bars.

The jointing jig main body is not limited to the above-described configuration. For example, a pair of thin iron plates may be provided on the lower surface of a flat iron plate in parallel with each other, or may be disposed parallel to and separated from each other. The pair of thin iron plates may be connected by a reinforcing bar or the like.
In short, any configuration may be adopted as long as it is provided with an insertion portion that opens downward and has a joint material inserted therein so as to be removably inserted therein. Further, the gripping portion is not limited to the above-described configuration, and any configuration may be adopted as long as the gripping portion is provided on the upper surface of the jointing jig and can be gripped by an operator or the like.

Further, the joint construction jig body may be formed to have a size substantially equal to a width of a roadbed to be paved,
It may be formed smaller than the width of the roadbed. When it is formed to be smaller than the width of the roadbed, the joint construction jig body may be installed continuously in the width direction of the roadbed to be paved.

In the jointing jig of the first aspect, the jointing jig body is inserted into the insertion portion of the jointing jig body, and the jointing jig body into which the jointing material is inserted should be paved. The joint material is inserted into the concrete together with the jointing jig body by inserting the opening of the insertion portion downward into the uncured concrete cast on the roadbed, and then joining the jointing jig. The joint is constructed by pulling the main body from the concrete while holding the grip portion while leaving the joint material in the concrete. Therefore, there is no need for the work of temporarily fixing the jointing material on the roadbed as in the past, such as laying adjustment mortar and inserting a reinforcing bar, and after the concrete is poured, the jointing material is jointed with the jointing jig. Since it is inserted into the concrete together with the main body, the jointing material may shift due to the concrete placement pressure,
Without breakage, it is possible to continuously cast concrete.

In the jointing jig of the first aspect, a jointing material is inserted into an insertion portion of the jointing jig body, and the jointing jig body into which the jointing material is inserted is paved. After placing the insert on the roadbed to be opened with the opening of the insertion portion facing downward, and then pouring concrete on the roadbed, the jointing jig body is removed from the concrete by holding the gripping portion. The joint can also be constructed by extracting the joint material while leaving it in the concrete.

To install and fix the jointing jig on the roadbed, for example, an operator may press the jointing jig from above, or insert a reinforcing bar into the roadbed through the jointing jig body. However, since the joint material is held by the joint construction jig main body, the number of reinforcing bars to be used can be reduced as compared with the conventional case where the joint material itself is temporarily fixed by the reinforcing bar. This is unnecessary or unnecessary, and the adjustment mortar is not required, so that the work is reduced as compared with the related art. In addition, even if the jointing jig slightly deviates from the predetermined position due to the concrete casting pressure, the operator can easily correct the misalignment by holding the grip and moving the jointing jig slightly before hardening the concrete. can do.

According to a second aspect of the present invention, in the first aspect, a slide member is provided at the insertion portion so as to be slidable in a horizontal direction on the joint material. The slide member is formed of, for example, a bar, and the length of the bar is set to be slightly shorter than the length of the insertion portion, and the width of the bar is set substantially equal to or slightly smaller than the width of the insertion portion. The joint member can be slid horizontally in the horizontal direction.

[0016] Further, as described above, the joint construction jig main body is provided with a pair of angle irons arranged in parallel and spaced apart with one of the pieces back-to-back. Fix the thin steel plate extending downward,
If the configuration is such that the gap between the thin iron plates is an insertion portion, the upper portion of the insertion portion is open, so that the operator can easily slide the slide member from this opening with a finger or the like.

According to a second aspect of the present invention, a slide member and a joint material are inserted into an insertion portion of a joint construction jig body, and the slide member and the joint material are inserted. By inserting the main body into the uncured concrete cast on the roadbed to be paved with the opening of the insertion portion facing downward, the slide member and the joint material are put into the concrete together with the joint construction jig body. After inserting and then sliding the slide member horizontally on the joint, the joint construction jig main body is held from the concrete by holding the grip portion, leaving the slide member and the joint in the concrete. Then, the joint is constructed by pulling out the slide member.

[0018] Therefore, as in the case of the first aspect, there is no need to perform operations such as placing the mortar for adjustment and inserting a reinforcing bar, and the joint material is not displaced or damaged by the driving pressure of the concrete. In addition, it is possible to continuously cast concrete. Also, after the jointing jig body is inserted into the concrete, the slide member is slid horizontally on the jointing material, and when the jointing jig body is inserted into the concrete, the inner surface of the jointing material and the insertion portion are inserted. Since a small amount of air enters the space where the small amount of water is in close contact with the gap and the close contact is released, the joint is constructed by leaving the slide member and the joint material in the concrete from the concrete. The jig can be easily and reliably pulled out.

According to a second aspect of the present invention, a slide member and a joint material are inserted into an insertion portion of the joint construction jig body, and the joint member having the slide member and the joint material inserted therein is inserted. A jig is installed on the roadbed to be paved with the opening of the insertion portion facing downward, and then concrete is cast on the roadbed to the upper end of the jointing jig body, and a slide member is provided. After being slid in the horizontal direction on the joint material, the joint construction jig body is pulled out of the concrete by holding the grip portion while leaving the joint material and the slide member in the concrete, and then the slide member is pulled out. In this way, joints can be constructed.

According to a third aspect of the present invention, there is provided the joint construction method according to the first aspect.
A method of constructing a joint using a joint construction jig, first, insert a joint material into an insertion portion of the joint construction jig, and then, the joint construction jig into which the joint material is inserted,
Insert the opening of the insertion portion downward into the uncured concrete cast on the roadbed to be paved,
The joint construction jig is pulled out of the concrete by holding the grip portion while leaving the joint material in the concrete.

To insert the joint material into the insertion portion, the joint of the joint construction jig is turned upside down, the opening of the insertion portion is directed upward, and the joint is inserted from this opening. Then, the joint construction jig into which the joint material has been inserted is returned to its original position, and the joint construction jig is inserted into the uncured concrete cast on the roadbed. A plurality of the joint construction jigs are prepared, and the plurality of joint construction jigs are inserted at predetermined intervals in the length direction of the roadbed into concrete cast on the roadbed.

According to the joint construction method of the third aspect, the joint construction jig in which the joint material is inserted is inserted into the uncured concrete cast on the roadbed.
No work is required to temporarily fix the jointing material on the roadbed, such as laying adjustment mortar or inserting rebar, and the jointing material does not shift or break due to the concrete placing pressure, and In this method, continuous concrete can be cast, and thus workability and workability at the time of joint construction are improved.

A joint construction method according to a fourth aspect is a method for constructing a joint using the joint construction jig according to the second aspect. First, a slide member and a joint material are inserted into an insertion portion of the joint construction jig. Inserting, then, the jointing jig into which the slide member and the jointing material have been inserted is inserted into the uncured concrete cast on the roadbed to be paved with the opening of the insertion portion facing downward. Then, after sliding the slide member on the joint material in the horizontal direction, the joint construction jig is pulled out of the concrete by holding the grip portion while leaving at least the joint material in the concrete. And

In order to insert the slide member and the joint material into the insertion portion, the top of the joint construction jig is turned upside down, the opening of the insertion portion is directed upward, and the slide member and the joint material are sequentially inserted from this opening. Therefore, the slide member inserted into the insertion portion and the joint material are in contact with each other. Then, the joint construction jig in which these are inserted is returned to its original position, and the joint construction jig is inserted into the uncured concrete cast on the roadbed.

[0025] The term "withdrawing the jointing jig from the concrete while leaving at least the jointing material in the concrete" means that the jointing jig is pulled out together with the slide member while leaving only the jointing material in the concrete. ,
Alternatively, it means that the joint includes a case in which both the joint material and the slide member are left in the concrete and the joint construction jig is pulled out.

In the case where the jointing jig is pulled out together with the slide member while leaving only the jointing material in the concrete, when the fluidity of the concrete is reduced or lost, the concrete is pulled out. A resin is injected into the formed recess to fill the recess. Also,
When the jointing jig is pulled out while leaving both the joint material and the slide member in the concrete, the drawing is facilitated by drawing while the concrete has fluidity, and the concrete has fluidity. When the slide member is lost, the slide member is pulled out, and a resin is injected into a recess formed in the pulled-out portion to fill the recess.

According to the joint construction method of the fourth aspect, the workability and the workability at the time of the joint construction are improved as in the case of the third aspect. Further, after the jointing jig is inserted into the concrete, the slide member is slid horizontally on the jointing material, so that when the jointing jig is inserted into the concrete, the jointing material and the inner surface of the insertion portion are not in contact with each other. Where a small amount of water enters the gap and is in close contact therewith, a small amount of air enters and the close contact is released, so that the unhardened concrete leaves at least the joint material in the concrete and the joint construction repair The tool can be easily and reliably pulled out.

[0028]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 and FIG.
FIG. 1 shows an example of a joint construction jig 10 of the present invention. FIG. 1 is a perspective view of the joint construction jig 10, and FIG. 2 is a longitudinal sectional view of the joint construction jig 10. As shown in these drawings, the jointing jig 10 has a jointing jig body 11 and a grip portion 12 provided on an upper surface of the jointing jig body 11.

The jointing jig body 11 is arranged in parallel with the width direction of the roadbed to be paved, and has a pair of angle irons 13 having a substantially L-shaped cross section. These angle irons 13, 13 are arranged such that one of the pieces 13a, 13a is parallel to each other and back to back, and the other piece 13a
b and 13b are arranged so as to be located on the same virtual plane. Also, one piece 13 of the angle irons 13
Thin iron plates 14 and 14 are fixed to a and 13a by welding or the like. The thin iron plates 14, 14 correspond to the angle iron 1
The length in the horizontal direction is the same as that of the angle irons 13 and 13, and the left and right ends are flush with the left and right ends of the angle irons 13 and 13.
Further, the thin iron plates 14, 14 are separated from the upper ends of the one pieces 13 a, 13 a of the angle irons 13, 13 by the one pieces 13 a, 1.
An insertion portion 16 is provided to extend downward by a predetermined length from 3a, and a space between the thin iron plates 14, 14 is opened downward, and a joint material 15 is inserted therein so as to be insertable and removable. Have been. Therefore, the width of the insertion portion 16, that is, the distance between the thin iron plates is set to be substantially equal to the thickness of the joint material.

Further, a slide member 17 is slidably provided in the insertion portion 16 in the horizontal direction (the longitudinal direction of the angle iron 13) on the joint material 15. The slide member 17 is formed of a crosspiece 17.
7 is set slightly shorter than the length of the insertion portion 16, and the width of the crosspiece 17 is substantially equal to the width of the insertion portion 16.
By setting it to be slightly smaller, it is slidable in the horizontal direction on the joint material 15. Further, since the upper part of the insertion portion 16 is open and the length of the slide member 17 is set slightly shorter than the length of the insertion portion 16, the operator can slide the slide member 17 with a finger or the like from the opening. By pressing the end surface of the slide member 17, the slide member 17 can be easily slid.

The grip portion 12 is provided between the other pieces 13b, 13b of the pair of angle steels 13, 13 by four rebars 18 connecting the angle irons 13, 13 to each other. It is configured. The reinforcing bar 18 has a ring-opened rectangular shape in which a portion located between the angle irons 13 is cut out, and the other piece 1 of the angle irons 13 is formed.
3b and 13b are fixed to the upper surfaces by welding so as to project upward from the upper surfaces. Further, an iron plate 19 is fixed to the other pieces 13b, 13b of the angle irons 13, 13 by welding between the reinforcing bars 18, 18. The iron plate 19 connects the angle irons 13, 13, and when the joint construction jig body 11 is inserted into the concrete, the slide member 17 and the joint material 16 inserted into the insertion portion 16 become concrete. This is for preventing it from being pushed upward and deviating upward.

Next, a method of constructing a joint using the joint construction jig 10 having the above configuration will be described. First, FIG.
As shown in FIG. 3, the joint construction jig 10 is turned upside down, the opening of the insertion portion 16 is directed upward, and the slide member 1 is inserted through this opening.
7 into the insertion portion 16, and further, as shown in FIG.
By bringing the slide member 17 into contact with the back surface of the iron plates 19, the slide member 17 is held horizontally in the insertion portion 16.

Next, as shown in FIG.
6, the joint material 15 is inserted from the opening thereof, and furthermore, the joint material 15 is brought into contact with the slide member 17 as shown in FIG. . Next, as shown in FIG. 7, the top and bottom of the joint construction jig 10 in which the slide member 17 and the joint material 15 have been inserted into the insertion portion 16 are restored. At this time, the slide member 17 and the joint material 15 are held in the insertion portion 16 by the frictional force between the thin steel plates 14 and 14.

Next, as shown in FIG. 8, the jointing jig 10 is vertically inserted into the unhardened concrete 5 placed on the roadbed 1 to be paved with the opening of the insertion portion 16 facing downward. Insert into. At this time, the joint material 1 in the insertion portion 16
The lower end face of the joint 5 is pressed upward by the concrete 5, but the joint material 15 is in contact with the slide member 17, and the slide member 17 is in contact with the iron plate 19. The slide member 17 is not pushed upward from the insertion portion 16. A predetermined number of the jointing jigs 10 are prepared in advance, and each jointing jig 10 is inserted into the concrete 5 immediately after being cast on the roadbed 1.

When the jointing jig 10 is inserted into the concrete 5 until the lower end thereof reaches the upper surface of the roadbed 1, the jointing jig body 11 is inserted as shown in FIGS. Pieces 13b, 13 of the angle irons 13, 13
b comes into contact with the upper surface of the concrete 5. In FIGS. 10 and 11, reference numeral 20 denotes the roadbed 1
Are formed on both sides of the base 1, and the form 5 prevents the concrete 5 from flowing out to the side of the roadbed 1.

Next, an operator puts a finger on both ends of the slide member 17, and the end face of the slide member 17 is moved to the position shown in FIG.
And in FIG. Then, when a small amount of water enters into the gap between the joint material 15 and the inner surface of the insertion portion 16 when the joint construction jig body 11 is inserted into the concrete, and a small amount of air enters, the small amount of air enters. The contact is released.

Next, as shown in FIG. 12, before the concrete is hardened, the jointing jig main body 11 is moved to the grip portion 1.
2 are pulled upward from the concrete 5 with the reinforcing bars 18. Then, the joint material 15 and the insertion portion 1
Since the close contact with the inner surface of 6 has been released, the joint material 15 and the slide member 17 are left in the concrete. Thereby, the joint material 15 is installed in the concrete 5.

Finally, after the concrete 5 loses its fluidity, as shown in FIG. 13, the slide member 17 is pulled upward from the concrete 15, and the resin is poured into the recess 21 formed in the pulled-out portion. Inject the recess 2
Fill 1 and complete the joint construction.

As described above, according to the joint construction method of the present embodiment, after the joint construction jig 10 in which the joint material 15 is inserted is inserted into the unhardened concrete 5 cast on the roadbed 1, the joint material is joined. Since the jointing jig 10 is pulled out of the concrete 5 while leaving 15 in the concrete, there is no need for the work of temporarily mounting the jointing mortar and inserting the reinforcing bar for temporarily fixing the jointing material on the roadbed as in the conventional case. In addition, the joint material shifts due to the concrete casting pressure,
Without breakage, it is possible to continuously cast concrete. Therefore, workability and workability at the time of joint construction can be remarkably improved as compared with the related art.

The jointing jig 10 is connected to the concrete 5
After being inserted into the joint, the slide member 17 is slid horizontally on the joint material 15, thereby releasing the joint between the joint material 15 and the inner surface of the insertion portion 16. , The joint construction jig 10 alone can be easily and reliably pulled out, and the joint construction can be performed reliably.

In the above-described example, the joint is constructed by inserting both the slide portion 17 and the joint material 15 into the insertion portion 16 of the joint construction jig 10, but only the joint material 15 is inserted into the insertion portion 16. Then, the joint may be constructed. In this case, when the jointing jig 10 is inserted into the concrete 5 and then the jointing jig 10 is pulled out, care is taken so that the jointing material 15 is not pulled out with the jointing jig 10. For example, when the jointing jig 10 is pulled out, the jointing material 15 can be easily and surely held by holding the jointing material 15 from above through the opening above the insertion portion 16 with a reinforcing bar or the like.
5, only the joint construction jig 10 can be pulled out.

In the above example, the jointing jig 10
Is inserted into the cast concrete 5 before hardening, and the joint is constructed. However, the joint can also be constructed by the following method. That is, in the same manner as in the above example, the slide member 17 and the joint material 15 are inserted into the insertion portion 16 of the joint construction jig body 11, and the joint construction jig into which the slide member 17 and the joint material 15 are inserted. 14, as shown in FIG. 14, is installed on the roadbed 1 to be paved with the opening of the insertion portion 16 facing downward. Next, concrete 5 is poured onto the roadbed 1 after the operator holds down the installed jointing jig 10 so as not to move.

Thereafter, in the same manner as in the above example, the slide member 17 is slid horizontally on the joint material 5, and then the joint construction jig 10 is removed from the concrete 5 by holding the grip 12. The joint member 15 and the slide member 17 are pulled out in the concrete, and finally, after the fluidity of the concrete 5 is lost, the slide member 17 is pulled upward from the concrete 15 and a concave formed in the pulled-out portion. The joint can be constructed by injecting a resin into the place 21 to fill the recess 21.

In this construction method, concrete cannot be continuously poured as in the above-described example, but a reinforcing bar and a mortar for adjusting, which are conventionally used for temporarily fixing the joint material itself with a reinforcing bar, are required. Therefore, the work can be reduced as compared with the related art. Further, even if the jointing jig 10 is slightly deviated from a predetermined position due to the casting pressure of the concrete, the operator moves the jointing jig 10 slightly before hardening the concrete by holding the grip portion 12 to reduce the deviation. Can be easily modified.

Further, in the above-described construction method, the operator holds down the joint construction jig 10 installed on the roadbed 1 so as not to move. Instead, as shown in FIG. 22 or the like. In this case, the reinforcing steel bars 22 are connected to the angle steel 13 of the jointing jig main body 11,
The joint material 15 is held by the joint construction jig body 11, so that the joint reinforcing material 22 used in comparison with the conventional joint material itself is temporarily fixed by the reinforcing steel. .., And the adjustment mortar is not required, so that the work can be reduced as compared with the related art.

[0046]

As described above, according to the first aspect of the present invention,
The jointing jig has a jointing jig body disposed on a roadbed to be paved, and a gripping portion provided on an upper surface portion of the jointing jig body. Since the joint is opened downward and has an insertion portion into which the joint material is removably inserted, the joint construction jig body into which the joint material is inserted is placed on a roadbed before curing. By inserting the opening of the insertion portion downward into the concrete, and then pulling out the jointing jig body from the concrete by holding the grip portion and leaving the jointing material in the concrete, thereby joining the joint. Can be constructed easily and reliably.

According to a second aspect of the present invention, in the first aspect, a slide member is provided on the insertion portion so as to be slidable in the horizontal direction on the joint material. After the fixture body is inserted into the concrete, the slide member is slid horizontally on the joint material, so that a small amount of water enters the gap between the joint material and the inner surface of the insertion portion and is in close contact therewith. Since a small amount of air enters and the close contact is released, the jointing jig can be pulled out of the concrete while leaving the slide member and the jointing material in the concrete, and thus the jointing can be reliably performed. Things.

According to a third aspect of the present invention, a jointing material is inserted into an insertion portion of the jointing jig of the first aspect, and then the jointing jig in which the jointing material is inserted is placed on a roadbed to be paved. Into the uncured concrete placed into the concrete, the opening of the insertion portion is inserted downward, and then the jointing jig is held in the concrete from the concrete with the gripping portion and the jointing material is introduced into the concrete. Since the joint is constructed by pulling it out, there is no need for the conventional work of temporarily fixing the joint material on the roadbed, such as laying adjustment mortar and inserting reinforcing steel. It does not shift or break due to the concrete casting pressure,
Furthermore, continuous casting of concrete becomes possible,
Therefore, workability and workability at the time of joint construction can be remarkably improved.

According to a fourth aspect of the present invention, there is provided a joint construction method, wherein a slide member and a joint material are inserted into an insertion portion of the joint construction jig according to the second aspect,
Next, these slide members and the jointing jig into which the jointing material has been inserted are inserted into the uncured concrete placed on the roadbed to be paved with the opening of the insertion portion facing downward, and then, After sliding the slide member on the joint material in the horizontal direction, the joint is constructed by pulling out the joint construction jig from the concrete by holding the grip portion and leaving at least the joint material in the concrete. Therefore, similar to the case of claim 3, workability at the time of joint construction,
Of course, the workability is improved, and by sliding the slide member horizontally on the joint material, the close contact between the joint material and the inner surface of the insertion portion is released. Therefore, since the jointing jig can be easily and reliably pulled out of the unhardened concrete while leaving at least the jointing material in the concrete, the jointing can be reliably performed.

[Brief description of the drawings]

FIG. 1 shows an example of a joint construction jig of the present invention, and is a perspective view of the joint construction jig.

FIG. 2 is a vertical sectional view of the joint construction jig.

FIG. 3 is a perspective view illustrating a state in which a slide member is inserted into the joint construction jig for explaining a method of constructing the joint using the joint construction jig shown in FIG. 1;

FIG. 4 is a perspective view showing a state where a slide member is inserted into the joint construction jig.

FIG. 5 is a perspective view showing a state in which the joint material is inserted into the joint construction jig.

FIG. 6 is a perspective view showing a state where the joint material is inserted into the joint construction jig.

FIG. 7 is a perspective view showing the joint construction jig into which the joint material is inserted.

FIG. 8 is a perspective view showing a state in which the jointing jig is inserted into concrete.

FIG. 9 is a perspective view showing a state in which the jointing jig is inserted into concrete.

FIG. 10 is a plan view showing a state where the joint construction jig is inserted into concrete.

FIG. 11 is a cross-sectional view showing a state in which the jointing jig is inserted into concrete.

FIG. 12 is a perspective view showing a state where the jointing jig is pulled out of the concrete.

FIG. 13 is a perspective view showing a state where the slide member is pulled out of the concrete.

FIG. 14 is a perspective view showing a state in which a joint construction jig is installed on a roadbed.

FIG. 15 is a perspective view showing a state in which a jointing jig is installed on a roadbed and fixed with a reinforcing bar.

FIG. 16 is a cross-sectional view for explaining an example of a conventional joint construction method and showing a state where the joint is constructed.

FIG. 17 is a plan view showing a state where the joint is constructed.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Roadbed 5 Concrete 10 Joint construction jig 11 Joint construction jig main body 12 Gripping part 15 Joint material 16 Insertion part 17 Slide member

Claims (4)

(57) [Claims] 1. A joint construction jig main body arranged in parallel with a width direction of a roadbed to be paved, and a grip portion provided on an upper surface portion of the joint construction jig main body, wherein the joint construction jig is provided. A joint construction jig characterized in that a joint body is provided with an insertion portion that opens downward and into which a joint material is removably inserted. 2. The jointing jig according to claim 1, wherein a slide member is provided on the insertion portion so as to be slidable in a horizontal direction on the jointing material. . 3. A method for constructing a joint using the jointing jig according to claim 1, wherein the jointing material is first inserted into an insertion portion of the jointing jig, and then the jointing material is inserted. The jointing jig is placed in the uncured concrete cast on the roadbed to be paved,
Inserting the opening of the insertion portion downward, and then pulling out the jointing jig from the concrete while holding the grip portion while leaving the jointing material in the concrete. . 4. A method of constructing a joint using the joint construction jig according to claim 2, wherein a slide member and a joint material are first inserted into an insertion portion of the joint construction jig. The jointing jig into which the jointing material has been inserted is inserted into the uncured concrete cast on the roadbed to be paved with the opening of the insertion portion facing downward, and then the slide member is jointed with the jointing material. A method for jointing the joint, wherein the joint is slid in a horizontal direction, and then the jointing jig is pulled out of the concrete by holding the grip portion while leaving at least the jointing material in the concrete.