JPH0762753A - Joint method of building frame and splice sleeve used therefor - Google Patents

Abstract

PURPOSE:To join together reinforced concrete construction building frames such as beams, pillars, walls, and slabs efficiently and economically. CONSTITUTION:Rinforcement materials 41 are inserted through the opening part 22a of a splice sleeve 21 up to the midway, and grout material 43 is poured into a first hollow part 23 through a first grout pouring port 26 so as to support and fix the reinforcement materials 41 with the splice sleeve 21. An opening part 22b is positioned nearby the end face of a postconstructing side RC building frame 46 and the opening part 22b and the opening ends of pipes 31, 32 are closed. After concrete is placed so as to form a preconstructing side RC building frame 45, the opening part 22b and the opening ends of the pipes 31, 32 are opened so as to insert reinforcement materials 47 through the opening part 22b, and the grout material 43 is poured into a second hollow part 24 through the opening end of the pipe 31 so as to support and fix the reinforcement materials 47 of the postconstructing side RC building frame 46 with the splice sleeve 21.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a skeleton joining method suitable for joining two reinforced concrete skeletons, for example, at the time of building extension, and a splice sleeve used therefor.

[0002]

2. Description of the Related Art Generally, when joining precast reinforced concrete members (hereinafter abbreviated as PCa members), the deformed reinforcing bars of the PCa members are inserted into a splice sleeve made of cylindrical cast iron and the like. A splice sleeve method is applied in which the deformed reinforcing bars are integrated by filling a cement-based non-shrinkable high-strength grout material into the splice sleeve. Conventionally, as a splice sleeve used in such a splice sleeve construction method, there is one shown in FIG. 7, for example.

In the splice sleeve 1 shown in this figure, a grout inlet 4 is formed on one side of a cylindrical sleeve body 2, and an exhaust port 5 is formed on the other side of the sleeve body. A pin-type stopper 6, which serves as a stopper when inserting the reinforcing bar into the sleeve body 2, is fixed to the center of the hollow portion 3 of the sleeve 2 in a direction orthogonal to the axis of the sleeve body 2. The inner surface near the grout inlet 4 and the exhaust port 5 is formed in an uneven shape, and the inner surface from the pin-type stopper 6 of the sleeve body 2 to the opening 2a on the side of the grout inlet 4 is:
It is formed in a tapered shape such that its diameter becomes smaller toward the opening 2a.

In order to integrate the rebars with each other using the splice sleeve 1, for example, the rebar 7 of one frame is inserted from the opening 2a side, and then the rebar of the other frame is inserted from the opposite opening 2b. After inserting 8, the grout material 9 such as mortar is injected from the grout injection port 4. At this time, the exhaust port 5
From, the air in the hollow portion 3 is discharged. When the grout material 9 is solidified, the rebars 7 and 8 are integrated with each other. However, in this case, since the grout material 9 injected from the grout injection port 4 passes through the pin-type stopper 6 and reaches the entire hollow portion 3, the grout material 9 must be inserted into the sleeve body 2 without fail. Must be done before injection. Therefore, when building a building, for example, when forming the frame of the extension part by precast and joining this frame to an existing building, the recast bar of the precast frame and the bar of the existing building are separated from each other. Since it has to be inserted into the sleeve main body 2, it is not very suitable.

Focusing on these problems, for example, as shown in FIG. 8, a pillar 11 of an existing building and a pillar 12 of an extension portion are added to the pillar 11.
In the case of joining the bars, the reinforcing bar 15 is previously extended from the upper end of the pillar 11 at the time of constructing the existing building, and the reinforcing bar 1
After covering the end of No. 5 with the cap 16, it is covered with the poorly mixed curing concrete 17 while the pillar 12 for the extension work is added.
Is a precast formed by inserting concrete from the opening 2a of the splice sleeve 1 halfway and placing concrete with the opening 2b positioned at the end face to be joined (Fig. (A)). . Then, at the stage of extension work, the curing concrete 17 is disassembled and the cap 16 is removed.
After removing the splice sleeve 1 integrated with the pillar 12
Of the grout injection passage formed in the pillar 12 by inserting the reinforcing bar 15 from the opening 2b of the pillar 11 and joining the pillars 11 and 12 between the upper end surface of the pillar 11 and the lower end surface of the pillar 12 via the floor mortar 18. Mortar 19 is injected from 12a. At this time, the air in the hollow portion 3 of the splice sleeve 1 is discharged from the exhaust passage 12b ((b) in the figure).

[0006]

However, in the case of joining as shown in FIG. 8, the reinforcement 16 of the pillar 11 is covered with the cap 16 and the curing concrete 17 before the construction of the building and the construction is completed. At the time of construction, it is necessary to perform troublesome work such as breaking the curing concrete 17 and removing the cap 16, which causes a problem that work efficiency is lowered and construction cost is increased.

The present invention is to solve the above-mentioned inconvenience, and an object thereof is to provide a method for joining skeletons such as beams, columns, walls and slabs, which is capable of efficiently and economically joining, and a method for joining the same. It is to provide a splice sleeve to be used.

[0008]

A method for joining a skeleton and a splice sleeve used therefor according to the present invention, wherein:
In the one described in (1), while inserting the muscle material from the opening on one end side of the splice sleeve to the middle, the grout material is injected into the splice sleeve from the muscle material insertion side to the middle to insert the muscle material into the splice sleeve. Pre-construction by fixing the bearing, locating the opening on the other end side of the splice sleeve near the end face of the structure to be constructed, and placing concrete with the opening on the other end side of the splice sleeve closed. After forming the concrete structure on the side, when joining the structure on the post-installed side to the structure, the opening on the other end side of the splice sleeve is opened and the structure on the post-installed side is opened from the other end side opening. While inserting the reinforcement for, the grout material is injected into the remaining space in the splice sleeve, and the muscle material of the body on the post-installation side is attached to the splice sleeve. Seung wherein the fixing.

According to a second aspect of the present invention, there is provided a splice sleeve used for connecting a reinforcing member, which is divided into a sleeve main body having a tubular body into a first hollow portion and a first hollow portion which are divided in a longitudinal direction. A partition part that forms a second hollow part is provided, and a pair of grout injection port and exhaust port are formed on the side part of the sleeve body corresponding to each of the first and second hollow parts. Characterize.

According to a third aspect of the present invention, in the second aspect of the present invention, each of the grout injection port and exhaust port of at least one of the hollow portions has a predetermined length for each of grout injection and exhaust pipes. It is characterized by connecting.

[0011]

According to the method of joining a skeleton of the present invention and the splice sleeve used therefor, according to the first aspect of the present invention, firstly, the muscle material is inserted halfway through the opening on one end side of the splice sleeve, and the grout material is attached. The muscular material is injected into the splice sleeve halfway from the side where the muscular material is inserted, and the muscular material is supported and fixed to the splice sleeve. Then, the other end side opening of the splice sleeve, that is, the opening on the side where the reinforcing material is not inserted is located near the end face of the body to be constructed, and the other end side opening of the splice sleeve is, for example, a cap or the like. Are fitted and closed, and concrete is poured to form the concrete structure on the pre-construction side. Such a pre-construction side frame may be formed of cast-in-place concrete or may be a precast member.

After the formation of the concrete structure on the pre-construction side, when joining the skeleton on the post-construction side for the purpose of extension, etc.,
Opening the other end side opening of the splice sleeve that was blocked, while inserting the muscle material for the body of the post-working side from the other end-side opening of the splice sleeve integrated with the body of the pre-working side, The grout material is poured into the remaining space in the splice sleeve to support and fix the muscle material for the post-construction side body to the splice sleeve. At this time, if the frame on the post-construction side is formed by cast-in-place concrete, concrete is placed from the state in which the above-mentioned muscles for the frame on the post-construction side are supported and fixed in the splice sleeve, and finally the post-construction is performed. Side frame, and when the post-construction side frame is formed of precast concrete members, the joint end faces of the pre-construction side frame and the post-construction side frame are matched, and the post-construction side frame Joining is completed when the material is fixed to the splice sleeve. In this way, it is possible to separately attach the muscular members of both the skeletons in the splice sleeve, and it is possible to eliminate the need for complicated work at that time, thus improving the workability.

According to the second aspect of the present invention, the sleeve main body is internally provided with a partitioning portion that divides the interior into two parts in the longitudinal direction to form the first hollow portion and the second hollow portion, and forms a pair. Since the grout inlet and the exhaust port are formed corresponding to each of the first and second hollow portions, it is possible to separately insert and connect the braces to the first and second hollow portions. . That is, first, when one of the reinforcing members is inserted into the first hollow portion and the grout material is injected from the grout injection port on the first hollow portion side, the air in the first hollow portion is discharged from the exhaust port on the first hollow portion side. The grout material is filled into the first hollow portion while being discharged. Next, when the grout material is injected from the grout injection port on the side of the second hollow part by inserting the other reinforcing member into the second hollow part, the air in the second hollow part is discharged from the exhaust port on the side of the second hollow part. The grout material is filled into the second hollow portion while being discharged, and when the grout material in each hollow portion is solidified, the bracing material is supported and fixed to the sleeve body.
In this way, the grout material injected from the separate grout inlets is not stopped by the partition and does not pass between the hollow portions, so that after the splice sleeve is attached to one of the braces, It is possible to attach the other reinforcement to the sleeve.

According to the third aspect, the second aspect
In the thing described in (1), by connecting each pipe for grout injection and exhaust of a predetermined length to at least one of the grout injection port and the exhaust port, the grout injection port and the exhaust port are substantially pipe-shaped. By extending the length, it is not necessary to form passages for grout injection port and exhaust port in the main body of the body when pouring concrete for the formation of the main body, and the work of pouring grout material into the sleeve main body becomes easy. , The workability is improved.

[0015]

Embodiments of the present invention will now be described in detail with reference to the drawings. 1 to 6 show an embodiment of a method of joining a skeleton and a splice sleeve used therefor according to the present invention, and FIG. 1 is a cross-sectional view of a splice sleeve 21 along the axial direction.

The splice sleeve 21 is made of a metal such as cast iron, and is divided into two parts in the longitudinal direction in the center of a cylindrical sleeve body 22 whose diameter is gradually reduced from the center toward both end openings 22a and 22b. A plate-shaped partition portion 25 forming the first hollow portion 23 and the second hollow portion 24,
The inner wall of the sleeve body 22 is formed in an uneven shape. Further, a pair of grout inlets and exhaust ports are formed on both sides of the sleeve body 22 with the partition 25 interposed therebetween. That is, on the side of the first hollow portion 23, the opening 22
A first grout injection port 26 for injecting grout is formed on the a side, and a first exhaust port 27 for discharging air is formed on the partition section 25 side.
On the other hand, on the side of the second hollow portion 24, the opening 2 is formed.
A second exhaust port 28 is formed on the 2b side, and a second grout injection port 29 is formed on the partition section 25 side.

Female threads 29a, 28a are formed on the inner walls of the second grout inlet 29 and the second exhaust port 28 formed on the side of the second hollow portion 24, and the second grout inlet 29 is formed.
Further, the pipes 31 and 32 having male screws 31a and 32a to be screwed with the female screws 29a and 28a can be detachably arranged at the second exhaust port 28. When these pipes 31 and 32 are arranged at the second grout inlet 29 and the second exhaust port 28, the axes thereof are the same as the sleeve body 2
It will be orthogonal to the axis of 2.

Next, referring to FIGS. 2 to 5, a method of joining two reinforced concrete frames (hereinafter, abbreviated as RC frames) by using the splice sleeve 21 having the above-mentioned structure, particularly when a building is extended. The case of joining the pre-constructed frame and the post-constructed frame will be described. First, with the pipes 31 and 32 arranged in the sleeve body 22,
The reinforcing bar 41 is inserted from the opening 22a into the first hollow part 23, and the seal 42 closes the gap between the opening 22a and the reinforcing bar 41 at a position where the end of the reinforcing bar 41 is substantially in contact with the partition 25. In this state, the grout material 43 such as mortar is injected from the first grout injection port 26 into the first hollow portion 23. At this time, the air in the first hollow portion 23 is discharged to the outside from the first exhaust port 27 as the grout material 43 is injected, and the grout material 43 is moved to the second hollow portion 24 by the partition portion 25. Does not pass through the first hollow portion 23
Filled inside (see FIG. 2).

When the grout material 43 is filled in the first hollow portion 23 and the grout material 43 is solidified, the seal 42 is removed and the opening 22b of the sleeve body 22 and the pipe 3 are removed.
Caps 44 made of a flexible material such as rubber are attached to the open ends of 1 and 32 to seal the inside of the second hollow portion 24. After this, concrete is poured and the rebar 41
The RC frame 45 on the pre-construction side, which is made of striated material, is constructed. At this time, the cap 44 is covered by pouring concrete, or the cap 44 is prevented from being fixed by concrete (see FIG. 3).

After that, when the concrete of the RC frame 45 on the pre-construction side hardens, the cap 44 is removed. Then, the reinforcing bars 47 that constitute the post-working side RC body 46 joined to the front-working side RC body 45 are provided with the second hollow portion 24 from the opening 22b.
When the end of the reinforcing bar 47 is substantially in contact with the partition part 25, the seal 4 is inserted between the opening 22b and the reinforcing bar 47.
Close by 8. The post-construction side RC skeleton 46 is a skeleton that is an extension part of the pre-construction side RC skeleton 45 which has already been completed in the case of building extension. In this state, the grout material 43 such as mortar is injected into the second hollow portion 24 from the pipe 31 arranged in the second grout injection port 29. At this time, the air in the second hollow portion 24 is the same as the grout material 43 is injected into the pipe 32 provided in the second exhaust port 28.
The grout material 43 is discharged to the outside from the partition portion 2
5 does not pass through the first hollow portion 23, but is filled in the second hollow portion 24 (see FIG. 4).

Then, for the purpose of ensuring a good joining state and leveling the surface irregularities of the joining surface, after applying an adhesive such as mortar (not shown) to the joining surface of the pre-construction side RC body 45,
The RC frame 46 on the post-construction side is constructed by placing concrete and using the reinforcing bars 47 as reinforcement, and the extension is completed (see FIG. 5).
By joining the two skeletons 45 and 46 in this way, it is possible to eliminate the complicated work such as the covering of the end portion of the muscular material, which has been conventionally performed, and promote good workability.

The above method has been particularly described for construction using cast-in-place concrete, but it is also possible to join PCa members using the splice sleeve 21 of the present invention. That is, pre-casting the pre-construction side RC skeleton 45 as shown in FIG. 2 is one work from inserting the reinforcing bar 41 into the sleeve main body 22 to placing concrete and constructing the pre-construction side RC skeleton 45. While forming, FIG.
RC after the reinforcing bar 47 extends from the end face as shown in
Precast the skeleton 46. Then, at the work site or the like, after inserting the reinforcing bar 47 of the post-working side RC body 46 from the opening 22b of the splice sleeve 21 integrated with the pre-working side RC body 45, the pipe arranged in the second grout inlet 29. A grout material 43 such as mortar is injected into the second hollow portion 24 from 31. As described above, the connection of the reinforcing bars and the joining of the skeletons can be suitably performed even by the construction using the PCa member.

The pipe 3 to the sleeve body 22
In the present embodiment, the mounting state of the pipes 1 and 32 is such that they are screwed together by screws formed respectively, but they may be fixed by welding, for example, or the pipes 31 and 32 may be connected to the sleeve body 22. It may be something that is fitted inside.

[0024]

As is apparent from the above description, the following effects can be obtained by the method of joining a skeleton of the present invention and the splice sleeve used therein. According to the first aspect of the present invention, it is possible to realize simple and efficient construction without the need for complicated work such as covering with concrete for curing and breaking, which has been performed at the time of joining conventional concrete structures. In addition, it is possible to reduce the construction cost.

According to the second aspect of the present invention, the inside of the sleeve body is divided into two parts in the longitudinal direction to form the first and second hollow parts, and the pair of grout pouring parts are provided. By forming the inlet and the exhaust port corresponding to each of the first and second hollow portions, it is possible to insert and connect the braces separately to the first and second hollow portions, and therefore construction can be performed. It is possible to improve the sex.

According to the third aspect of the present invention, at least one of the grout injection port and the exhaust port of the hollow portion is connected to the grout injection pipe and the exhaust pipe of a predetermined length, so that the sleeve main body is connected. The work of injecting the grout material into the inside becomes easy, and the workability can be improved.

[Brief description of drawings]

FIG. 1 is a side sectional view of a splice sleeve according to the present invention.

FIG. 2 is an explanatory diagram of a method of using the splice sleeve described in this embodiment.

FIG. 3 is an explanatory diagram of the same.

FIG. 4 is an explanatory diagram of the same.

FIG. 5 is an explanatory diagram of the same.

FIG. 6 is an explanatory diagram of the same.

FIG. 7 is a side sectional view showing an example of a conventional splice sleeve.

8A and 8B are explanatory views showing a method of using a conventional splice sleeve, in which FIG. 8A is an explanatory view showing a state before each pillar is joined, and FIG. 8B is a diagram after joining each pillar. It is explanatory drawing which shows a state.

[Explanation of symbols]

 21 Splice Sleeve 22 Sleeve Body 23 First Hollow Part 24 Second Hollow Part 25 Partition Part 26 First Grout Inlet 27 First Exhaust Port 28 Second Exhaust Port 29 Second Grout Injector 31, 32 Pipe 41, 47 Rebar 43 Grout material 44 Cap 45 RC frame before construction side RC frame after construction side

Claims (3)

[Claims] 1. A splint sleeve is inserted halfway through an opening on one end side thereof, and a grout material is injected into the splice sleeve halfway from the strut insertion side to support the splint sleeve to the splice sleeve. Fixed,
The other end side opening of the splice sleeve is located near the end face of the skeleton to be constructed, and concrete is poured into the pre-construction side by placing concrete with the other end side opening of the splice sleeve closed. After forming the skeleton, when joining the skeleton on the post-installation side to the skeleton, the opening on the other end side of the splice sleeve is opened and the muscle material for the skeleton on the post-installation side is opened from the other end side opening. And a grout material is injected into the remaining space in the splice sleeve to support and fix the muscle material of the body on the post-installed side to the splice sleeve. 2. A splice sleeve used for connecting a reinforcing member, wherein a first hollow portion and a second hollow portion are formed inside a sleeve body having a tubular body by dividing the inside in a longitudinal direction. A splice sleeve, characterized in that a partition portion is provided, and a pair of grout injection port and exhaust port are formed on a side portion of the sleeve body so as to correspond to the first and second hollow portions, respectively. 3. The splice sleeve according to claim 2, wherein each of the grout injection port and the exhaust port of at least one of the hollow portions is connected with a pipe of a predetermined length for grout injection and exhaust. .