JP2790045B2 - Method of joining precast concrete plate and its joining structure - 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 a structure for joining a precast concrete plate when joining the precast concrete plate to a building structure.

[0002]

2. Description of the Related Art Usually, when constructing a building, a handrail,
Precast concrete steps or landing boards are joined to vertical building structures such as walls made of precast concrete or cast-in-place, and the building is assembled. These step boards and landing boards are welded to vertical building structures (wall boards, handrail boards) to be connected to prevent damage or dropping due to their own weight or an earthquake. Conventionally, for example, a landing plate 5 made of precast concrete in which a reinforcing steel bar is embedded.
0, as shown in FIG. 14 and FIG. 15, after being joined by welding to a bracket 52 horizontally attached to a wall plate 51, a rustproof mortar M1 is joined to the joint portion and the landing plate 50,
The gap between the wall plate 51 and the bracket 52 is filled and connected. On the lower end surface of the landing plate 50, a steel plate 5 is provided.
4 is embedded with the outer surface exposed, and the plate 54 is welded to an anchor bar 53 embedded in the landing plate 50. On the other hand, a steel plate 56 welded to an anchor bar 58 embedded in the bracket 52 and the wall plate 51 is embedded in the recessed portion 55 of the bracket 52 with the outer surface exposed. Each plate 54, 56 is joined by a welding plate 57. The mortar M1 is filled to prevent the strength of the welded portion 57A of the welding plate 57 from being reduced by rust.

When connecting the landing board 50 to the wall board 51,
First, the landing plate 50 is placed on the bracket 52 for positioning, and the welding plate 57 is connected to the plate 54 on the landing plate 50 side.
And a plate 56 on the bracket 52 side, respectively, and welded. Next, as shown in FIG.
The gap between the wall plate 51 and the bracket 52 and the concave portion 55 are filled with mortar M1, and the surface of the mortar M1 is molded to complete the joining.

[0004]

In the above-mentioned conventional method for joining precast concrete plates and the joining structure,
The strength of the joint between the precast concrete plate and the building structure depends on the strength of the weld. For this reason, there was a problem that the strength of the joint was affected by the skill of the welder, and there was a concern about the reliability of the strength. In addition, since the two are joined by welding, there is a problem that a large amount of time and personnel are required for the welding operation, and the workability is poor.

SUMMARY OF THE INVENTION The present invention has been made to eliminate the above-mentioned drawbacks, and it is a precast concrete plate that can simplify joining work, improve working efficiency, and secure a certain strength without fear of a decrease in strength of a joined portion. It is an object of the present invention to provide a joining method and a joining structure thereof.

[0006]

According to the present invention, a method for joining precast concrete plates according to the present invention is to penetrate inside and outside a building structure.
Was drilled through connecting holes, the building structures and buried concluded tool a portion corresponding to the connection hole of the precast concrete plate side to be joined, during the joining of the building structure precast concrete plate, connecting From outside to the above connection hole
After the connecting tool is inserted through the connecting hole and connected to the fastener, the connecting hole is filled with a bonding agent from the outside , and the precast concrete plate is bonded to the building structure.

[0007] The joint structure of a precast concrete plate according to the present invention comprises a connecting hole penetrating through a building structure inside and outside, and a fastener embedded in a side of the precast concrete plate corresponding to the connecting hole. And a connector that is inserted into the connection hole from the outside and connected to the fastener.
And a bonding agent filled in the connection hole from outside .

[0008]

The method for joining a precast concrete plate according to the present invention comprises the steps of:
Is arranged at a predetermined mounting position, the connecting tool is inserted from the outside into the connecting hole and connected to the fastener, and then the connecting agent is filled from the outside into the connecting hole, so that the joining operation is simplified. You. In addition, since the connecting device is connected to the fastener embedded in the precast concrete plate and the connecting device is fixed in the bonding agent, the joint has a certain strength. Furthermore, the connection hole is formed by penetrating the inside and outside of the building structure.
Precast concrete plate and building structure
The degree of freedom in setting the mounting direction with the structure is increased.

[0009] The joint structure of the precast concrete plate according to the present invention comprises a precast concrete plate and a building structure.
The object is arranged at a predetermined assembly position, the connecting tool is inserted from the outside into the connecting hole and connected to the fastener, and the connecting hole is filled from the outside with a bonding agent to join the precast concrete plate to the building structure. As a result, the joining operation is simplified. In addition , since the connecting device is connected to the fastener embedded in the precast concrete plate and the connecting device is fixed in the bonding agent, the joint has a certain strength. Furthermore, the connection hole is formed by penetrating the inside and outside of the building structure.
Precast concrete plate and building structure
The degree of freedom in setting the mounting direction with the structure is increased.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the embodiments shown in the drawings. FIG. 1 is a longitudinal sectional view showing a joint structure of a precast concrete plate according to an embodiment of the present invention, FIG. 2 is a sectional view showing a joint structure on a precast concrete plate side, and FIG. 5 is a sectional view showing a joint structure on a building structure side. It is. As shown in FIG. 1, the precast concrete plate 2 is a step board in which a large number of reinforcing steel bars (not shown) are embedded vertically and horizontally. As shown in FIGS. 1 and 2, the step board 2 has a concave portion 2B formed on a vertical side surface 2A, and an insert 3 serving as a fastener is opened in the concave portion 2B so as to be perpendicular to the vertical side surface 2A. Buried in As shown in FIG. 4, the insert 3 has a long nut 3 screwed to an anchor 3A.
Long nut insert with anchor composed of B,
An opening end of the long nut 3B is adapted to be screwed with a connection bolt 10 described later.

The handrail plate 4 is a vertical building structure made of precast concrete or cast in place. A connection hole 5 is formed in the handrail plate 4. As shown in FIGS. 1 and 5, the connection hole 5 is formed at a position corresponding to the recess 2 </ b> B of the step board 2, penetrating the handrail plate 4 at right angles to the vertical surface of the handrail plate 4. . The connection hole 5 is shown in FIG.
As shown in FIG. 5, an expanding portion 6 expanding toward the outer surface 4A side of the handrail plate 4, a step portion 7 continuing to the expanding portion 6, and a gap S1 opening into the step portion 7 and having an inside. Through hole 8 defined
It is composed of As shown in FIG. 7, the through hole 8 is formed by expanding the opening 9 on the inner side surface 4B side of the handrail plate 4 substantially corresponding to the recess 2B.

A connection bolt 10 as a connection tool is inserted into the connection hole 5. The long connection bolt 10
A has a washer 11 fitted therein, and a tip portion 10B is threaded. When the connection bolt 10 is inserted from the outside of the handrail plate 4, the connection bolt 10 penetrates through the space S <b> 1 of the through hole 8 and the tip 1
0B is screwed to the long nut 3B, and the washer 11 comes into contact with the step 7 to close the opening of the through hole 8 (see FIG. 6). In the upper part of the step part 7, a washer 11 is provided.
Even if the opening is closed, a communication path 20 that connects the expanding portion 6 and the through hole 8 is formed. In addition, a communication hole 21 is formed in the washer 11 so that the expansion portion 6 and the through hole 8 communicate with each other. After the connection bolt 10 is connected to the insert 3 and the outside opening of the through hole 8 is closed by the washer 11, the non-shrinkable mortar (grout, cement paste) M2 as a bonding agent is inserted into the through hole 8. Is injected, the injection tube 26 of the grout filling pump 25 (see FIG. 8) is inserted and serves as an injection port. When the mortar M2 is injected into the through hole 8, the communication path 20 serves as an air outlet.

When the stair plate 2 and the handrail plate 4 are joined, a gap S2 is formed between the stair plate 2 and the handrail plate 4. The gap S between the step board 2 and the handrail board 4
As shown in FIGS. 1 and 3, a U-shaped damming member (pef) 28 made of an elastic material such as foamed plastic or rubber is provided on the second member. Damming member 28
Is formed so as to surround the periphery of the inner opening 9 of the through hole 8 and the recess 2B, and to open the upper part, and open ends 28A and 28B.
A is provided so as to be located at the same position or above the upper end of the opening 9. The blocking member 28 is provided in the gap S1 of the through hole 8.
Is filled with the mortar M2, the mortar M2 flows out of the inner opening 9 of the through hole 8 and the void S2 and the recess 2
B is also filled. Damming member 28
Is such that even if the mortar M2 is completely filled in the through hole 8, it does not leak out from the open ends 28A, 28A.

Next, a method of joining precast concrete plates according to the above embodiment will be described with reference to FIG. First, the stair plate 2 is lifted, and the concave portion 2 </ b> B is positioned and held so as to match the opening 9. Next, from the outside of the handrail 4, the through hole 8
Then, the connection bolt 10 is screwed into the long nut 3B of the insert 3 to connect the connection bolt 10 to the step board 2 side (see FIG. 9). At this time, washer 11
Is in contact with the step 7 and closes the outer opening of the through hole 8. When the connection bolt 10 and the insert 3 are connected,
The dam member 28 is inserted into the gap S2 between the stair plate 2 and the handrail plate 4, and the open ends 28A, 28A are positioned above the upper end of the through hole 8. When the damming member 28 is provided, the injection tube 26 is inserted into the communication hole 21, and the mortar M2 is injected into the space S1 of the through hole 8 from the grout filling pump 25. When the mortar M2 is injected into the through hole 8, the air in the through hole 8 is discharged through the communication passage 20 and the gap S2 communicating with the opening 9. And mortar M2
Is filled in the space defined by the concave portion 2B and the damming member 28, the air in the through hole 8 communicates with the communication passage 20.
And the mortar M2 is completely filled in the through hole 8. When the filling of the through holes 8 is completed, the mortar M2 is filled in the expanded portions 6 and the connection bolts 10 are embedded in the connection holes 5. When the connection hole 5 is filled with the mortar M2 and hardened, the joining between the step board 2 and the handrail 4 is completed.

As described above, in the method for joining precast concrete plates according to the above embodiment, the stair plate 2 and the handrail 4 can be connected only by screwing the connection bolts 10 to the inserts 3, and welding is necessary. Since there is no connection, the connection work can be shortened. In addition, since the joint strength between the connection bolt 10 and the insert 3 and the deterioration with time can be considered in advance in design, each joint has a constant and stable strength, and the reliability of the strength is improved.

Next, a joint structure of a precast concrete plate according to another embodiment of the present invention will be described with reference to FIGS. Note that the same or corresponding parts as those in the above embodiment are denoted by the same reference numerals, and description thereof will be omitted. The landing 30 made of precast concrete is configured by embedding a large number of reinforcing bars (not shown) in the vertical and horizontal directions. As shown in FIG. 10, the landing 30 has an insert 31 as a fastener embedded at right angles to a horizontal and vertical side surface 30A. The insert 31 is a long nut insert with an anchor composed of a long nut 31B screwed to the anchor 31A.

The wallboard 32 is a vertical building structure made of precast concrete or cast in place. A bracket 33 is horizontally attached to the wall plate 32. A connection hole 35 is formed in the wall plate 32. The connection hole 35 is formed at a position corresponding to the exposed end of the long nut 31 of the landing 30 at right angles to the vertical plane of the wall plate 32.
Is formed. The connection hole 35 has an enlarged portion 36 that expands toward the outer surface 32 </ b> A of the wall plate 32, a step portion 37 continuous with the enlarged portion 36, and a gap S <b> 3 opened in the step portion 37. And a defined through hole 38. The through hole 38 is formed by expanding an opening 39 on the inner side surface 32B side of the wall plate 32 (see FIG. 11).

A long connection bolt 40 whose tip is threaded is inserted into the connection hole 35. Connection bolt 40
The washer 41 is fitted into the head 40A. When the connection bolt 40 is inserted from the outside of the wall plate 32, the through hole 3
8 and screwed into the long nut 31B through the inside of the gap S3,
The washer 41 comes into contact with the step 37 (FIG. 1).
2). In the upper part of the step portion 37, a washer 41 is provided.
Even if the opening is closed, a gap S4 that connects the expanding portion 36 and the through hole 38 is formed. This space S4 is formed as filling of the mortar M2 and air bleeding. Landing 3
When 0 is placed on the bracket 33 and joined to the wall plate 32, a gap S <b> 5 is formed between the landing 30 and the wall plate 32 and the bracket 33.

The method of joining precast concrete plates according to the above embodiment will be described based on the operation of the above joining structure. First, the landing 30 is lifted, and the exposed end of the long nut 31B is positioned and held so as to match the opening 39. Next, from the outside of the wall plate 32, the through holes 3
The connection bolt 40 is inserted into 8, and the connection bolt 40 is screwed to the insert 31 to connect the connection bolt 40 to the landing 30 side (see FIG. 13). At this time, the washer 41 is in close contact with the step portion 37 and closes the lower side of the outside opening of the through hole 38,
The upper side of the opening of the through hole 38 is opened to the outside through the gap S4. When the connection bolt 40 and the insert 31 are connected, the injection tube 26 is inserted into the through hole 38 from the space S4, and the mortar M2 is injected from the grout filling pump 25 into the space S3 of the through hole 38. When the mortar M2 is injected into the through-hole 38, the air in the through-hole 38 is discharged via the space S4. When the mortar M2 is completely filled in the space S5 and the through hole 8, the mortar M2 is filled in the expanded portion 36, and the connection bolt 40 is embedded in the connection hole 35. When the connection hole 35 is filled with the mortar M2 and hardened, the landing 30 and the wall plate 3
2 is completed.

As described above, in the method for joining precast concrete plates according to the above-described embodiment, the landing 30 and the wall plate 32 can be connected only by screwing the connection bolts 40 to the inserts 31, and welding is necessary. Since there is no connection, the connection work can be shortened. In addition, since the joint strength between the connection bolt 40 and the insert 31 and the deterioration with time can be considered in advance in design, each joint has a constant and stable strength, and the reliability of the strength is improved.

In the above embodiments, the connection holes 5, 35
Although the concrete surface is directly exposed to the inside, the present invention is not limited to this, and a spiral sheath may be embedded in the inside surfaces of the connection holes 5 and 35.

In each of the above embodiments, a handrail plate or a wall plate is described as a vertical building structure. However, the present invention is not limited to this, and any vertical building structure may be used as long as it is joined at right angles to a precast concrete plate to be connected. It goes without saying that it is good. Further, in each of the above embodiments, a gap is provided between the two joining portions to be joined to each other, and the mortar is filled in the gap, but these two joining portions may be closely adhered. Needless to say, the building structure also includes a precast concrete plate as described above.

[0023]

As described above, according to the present invention, external
Lock the connecting device from the connector and connect it to the fastener .
Since the precast concrete plate is joined to the building structure by filling with a bonding agent, welding work becomes unnecessary and cost can be reduced. In addition, the joining operation is simplified, and the construction period can be significantly reduced. Furthermore, each joint has a certain strength,
The reliability of strength at the joint can be improved. In addition, since the connection hole is formed to penetrate the outside of the blue,
Assembling precast concrete boards and building structures
The direction can be set freely.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a joint structure of a precast concrete plate according to one embodiment of the present invention.

FIG. 2 is a sectional view of a main part showing a joint structure of the precast concrete plate of FIG. 1;

FIG. 3 is a side view of the precast concrete plate of FIG. 1;

FIG. 4 is a perspective view showing a fastener having the connection structure of FIG. 1;

FIG. 5 is an explanatory view of a main part showing a joint structure of the precast concrete plate of FIG. 1;

FIG. 6 is a side view of a main part of FIG. 5;

FIG. 7 is a side view of a main part of FIG. 5;

FIG. 8 is an explanatory view showing a joining method when joining with the joining structure of the precast concrete plates of FIG. 1;

9 is an explanatory diagram showing a connection state between the precast concrete plate of FIG. 1 and a building structure.

FIG. 10 is a longitudinal sectional view showing a joint structure of a precast concrete plate according to another embodiment of the present invention.

FIG. 11 is a side view of a main part of the building structure of FIG. 10;

FIG. 12 is a side view of a main part of the building structure of FIG. 10;

FIG. 13 is an explanatory diagram showing a connection state between the precast concrete plate of FIG. 10 and a building structure.

FIG. 14 is a cross-sectional view showing a joining state of a conventional precast concrete plate.

FIG. 15 is a side view showing a joining state of a conventional precast concrete plate.

FIG. 16 is a perspective view showing a joint state of a conventional precast concrete plate.

[Explanation of symbols]

 2 Step board (precast concrete board) 3 Insert (fastener) 4 Handrail board (building structure) 5 Connection hole 10 Connection bolt (Connector) M2 Mortar (Bonding agent)

Claims (10)

(57) [Claims] 1. A drilled connecting holes through the inside and outside the building structure, buried concluded tool a portion corresponding to the connection hole of the precast concrete plate side to be joined with the building structure, precast concrete At the time of joining the plate and the building structure, after inserting a connecting tool from the outside into the connecting hole and connecting the connecting tool to the fastener via the connecting hole, the connecting hole is filled with a bonding agent from the outside. Joining a precast concrete plate to a building structure. 2. A building structure and a precast concrete plate are arranged at a distance from each other, and a damming member for preventing leakage of a bonding agent is provided in the gap. 2. The method for joining precast concrete plates according to claim 1, wherein a gap is continuously filled with a bonding agent. 3. A connection hole penetrating through the inside and outside of a building structure, a fastener buried in a portion corresponding to the connection hole on a side surface of a precast concrete plate, and a connection hole inserted from outside into the connection hole. A connection tool connected to the fastener,
A joining structure for a precast concrete plate, comprising: a joining agent externally filled in the connection hole. 4. A dam member for preventing a bonding agent filled in a connection hole from leaking out of the gap between the building structure and the precast concrete plate. Precast concrete plate joint structure. 5. The connecting hole includes a widened portion that is widened toward the outer side surface of the building structure, a step portion that is continuous with the widened portion, and a through hole that is opened at the step portion and through which a connector passes. The joint structure for a precast concrete plate according to claim 3 or 4, wherein the joint structure comprises: 6. fastener structure for joining precast concrete plate according to claim 3 or 4, characterized in that it is embedded in the concave portion formed in the precast concrete plate side. 7. A connecting tool is constituted by a bolt having a washer inserted into a head thereof and a washer locked to a step portion of a connecting hole, and one end of the fastener is connected to an anchor bar and the other end is screwed to the bolt. claim 5 or 6, characterized in that consisted nut is
The joining structure of a precast concrete plate according to the above. 8. The joining of the precast concrete plate according to claim 7, wherein a communication passage is formed in the step portion, the communication passage connecting the expanding portion and the through hole when the washer is locked. Construction. 9. The joint structure for a precast concrete plate according to claim 8, wherein the washer is provided with a communication hole communicating the expanded portion and the through hole. 10. The damming member is composed of a U-shaped elastic member that surrounds the periphery of the opening of the connection hole on the precast concrete plate side, has an upper part opened, and has an open end located above the upper part of the connection hole. The joint structure for a precast concrete plate according to claim 4, characterized in that: