JP3177730B2 - Structure reinforcement structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a method for manufacturing a structure,
The present invention relates to a reinforcing structure for a structure in which a plurality of reinforcing steel plates are arranged adjacently and covered and fixed to each other to form reinforcement.

[0002]

2. Description of the Related Art As is well known, for example, a reinforced concrete structure used for a high-rise building is composed of reinforced concrete columns and beams provided with main bars and band bars, and has excellent seismic resistance. I have. In recent years, various reinforcing methods have been adopted for the above-mentioned reinforced concrete structure in order to further increase the earthquake-resistant structure.

In particular, for a reinforced concrete structure such as a pillar, a plurality of reinforcing steel plates are wound around the structure and connected by welding or the like, and an epoxy resin or the like is further inserted into a gap between the steel plate and the structure. Means for increasing strength by filling with mortar or the like is employed. This reinforcing means is particularly effective against radial expansion due to a load such as compression applied to a column or the like, and has an advantage that it can be applied to an existing structure.

[0004]

However, the above-mentioned means for reinforcing a structure have the following problems. In other words, welding work is required to connect a plurality of reinforcing steel plates to each other, and this welding work requires a large number of skilled welders and other personnel depending on the scale of construction and a large amount of construction costs associated therewith. Was. In addition, the connection of the reinforcing steel plates by welding is disadvantageous in that quality, particularly strength, tends to vary among the reinforcing steel plates, and that it takes time to perform the work.

The present invention has been made in view of the above-mentioned problems, and has as its object to provide a high-quality structure reinforcing structure which can be easily fixed, can be constructed at low cost and in a short time. And

[0006]

The present invention has the following features to attain the object mentioned above. That is, the present onset
In the reinforcement structure of a light structure, a plurality of reinforcing steel sheets are arranged adjacently on the surface of the structure to cover and connect to each other, and a curable filler is injected into the gap between the structure and the reinforcing steel sheet. This is a reinforcing structure for a structure in which the structure and the reinforcing steel plate are fixed to each other to form a reinforcement, and adjacent reinforcing steel plates are formed with joint portions that connect the side portions of each other in an overlapping state. These joints are connected to each other by screwing, and the overlapping surfaces of these joints are formed with concave and convex portions that engage with each other and restrict the movement of the reinforcing steel sheet in the adjacent direction. next to
The joint part of the reinforcing steel plate that comes in contact with
It is a stepped shape that makes the outer surfaces of each other flush, and the outer surface side
The joint portion provided has a through hole to which a screw member is attached.
A hole formed in the outer surface of the joint portion, and
Formed on the bottom of the concave part to store the member inside from the outer surface
The established technology is adopted. The reinforcing structure of this structure is fixed by screwing, and is provided with concave and convex portions that engage with each other, so that the reinforcing steel plate is fixed in the adjacent direction of the reinforcing steel plate, that is, without being connected by welding or the like. It has high strength against loads acting in the direction of pulling apart the steel sheet. In addition, the reinforcement structure of this structure
Is a step that makes the outer surface flush with the joints
It is shaped and has a recess for accommodating the screw member
The screw member protrudes from the outer surface to form a protrusion.
Without this, the entire outer surface is flattened. Structure of the present invention
The reinforcement structure of a structure is composed of multiple steel plates for reinforcement on the surface of the structure.
Cover and connect adjacent to each other,
Inject hardenable filler into the gap between the structure and the reinforcing steel plate
This secures the structure and the steel plate for reinforcement and
This is a reinforcement structure for building
Is a joint that connects the sides in an overlapping state
And these joints are screwed together.
Therefore, these joints are connected
The engaging surfaces engage each other to move the reinforcing steel sheet in the adjacent direction.
The concavo-convex portions to be restrained are respectively formed, and the joint portion is
The screw is fixed on both sides of the uneven portion.
You.

In the structure for reinforcing a structure according to the present invention, the structure
When a plurality of reinforcing steel plates are placed adjacent to and covered on the surface of the structure
Together with each other, the structure and the steel plate for reinforcement
Structure by injecting curable filler into the gap between
Structure of a structure that is reinforced by fixing steel to a reinforcing steel plate
However, adjacent reinforcing steel plates have their sides
The joints to be connected in the superposed state are formed,
When these joints are connected to each other by screwing
In particular, the overlapping surfaces of these joints are engaged with each other.
Irregularities that restrict the movement of the reinforcing steel sheet in the adjacent direction
And the joint portion is formed on both sides of the uneven portion.
The technique of screwing is adopted.

[0008]

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of the present invention will be described with reference to FIG. In these figures, reference numeral 1 is a column, 2 is a steel plate for reinforcement, 3 is a mortar,
Reference numerals 4 and 5 denote joint portions.

In the first embodiment, as shown in the embodiment of FIG. 1 (a), a reinforced concrete column 1 having a rectangular cross section as a structure is provided with two U-shaped reinforcing members in the circumferential direction thereof. This is a reinforcing structure in which the steel plate 2 is reinforced by being surrounded by the steel plate 2. The reinforcing steel plates 2 are arranged adjacent to each other so as to face each other in a state of surrounding the entire periphery of the column 1 so as to cover the surface of the column 1 and to form side portions 2a of each other. , 2b are overlapped and connected and fixed. Further, the gap between the column 1 and the reinforcing steel plate 2 is filled with mortar 3 as a curable filler. Needless to say, the column 1 which is a structure to be reinforced may be a steel column, a steel tube column, or a filled concrete steel tube column.
Alternatively, a horizontal member such as a truss beam or a beam member such as a diagonal member may be used. Further, the cross-sectional shapes of the columns and beams are not limited to rectangles.

The side 2a of the reinforcing steel plate 2 is disposed on the outer surface side, and the side 2b is disposed on the inner surface side. Further, as shown in FIG. 1B, the reinforcing steel plate 2 is formed with joint portions 4 and 5 for connecting these side portions 2a and 2b in an overlapping state. The joint portion 4 is formed with two through holes 4a, while the joint portion 5 is formed with a through hole 5b having the same axis as the through hole 4a. Bolts 6 are inserted into the through holes 5b from the inner surface side, and the bolt head and the joint portion 5 are fixed by being spotted by welding.

The joint portion 4 has a bolt 6 penetrated through the through hole 4a and is overlapped with the joint portion 5, and a nut 7 is screwed onto each of the bolts 6 projecting from the through hole 4a to the surface side. The part 5 is screwed and fixed. A plurality of concavo-convex portions 4b and 5b are formed on the superposed surfaces of the joint portions 4 and 5 to engage with each other and restrict the movement of the reinforcing steel plate 2 in the adjacent direction. The three concavo-convex portions 4b and 5b are formed with three pairs of locking surfaces H that abut against each other and are perpendicular to the adjacent direction, extending along the side portions 2a and 2b, respectively.

In the structure for reinforcing a structure according to the first embodiment, the reinforcing steel plates 2 are fixed to each other by screwing the bolts 6 and the nuts 7, and the uneven portions 4 b, 5 b formed on the joints 4, 5 are fixed. By providing, without connecting by welding or the like, the direction adjacent to the reinforcing steel plate 2,
That is, it has high strength against a load acting in a direction in which the reinforcing steel plates 2 fixed to each other are separated from each other. Further, since the reinforcing steel plate 2 is connected and fixed around the column 1,
It has high strength against radial expansion force due to a load such as compression applied to the column 1. Further, since the locking surface H is formed perpendicular to the direction in which the reinforcing steel plate 2 is adjacent, the uneven portions 4b and 5b are hardly displaced by a load that separates the reinforcing steel plate 2, and the locked state is maintained. .

Next, a method of constructing the reinforcing structure for a structure according to the first embodiment will be described with reference to FIGS. In these figures, reference numeral 8 denotes a base portion, and 9 denotes a mounting jig.

[Mounting jig assembling process] As shown in FIG. 2A, the root portion 1a of the pillar 1 erected on the base portion 8
Then, a mounting jig 9 for mounting the reinforcing steel plate 2 is assembled and fixed. The mounting jig 9 includes a base 9a fixed to the root portion 1a, and two ladder-shaped steel plate mounting portions 9b each having a base end rotatably mounted on the base 9a and rotating in a direction to clamp the column 1. And

[Steel Plate Erecting Step] The two steel plate mounting portions 9b of the mounting jig 9 are rotated and opened to fall on the base portion 8. And
The reinforcing steel plates 2 are mounted on the steel plate mounting portions 9b with their inner surfaces facing upward. In this state, FIG.
As shown in FIG. 2, the two steel plate mounting portions 9b are raised and rotated in the direction of pinching the column 1 (the direction of the arrow in the drawing), and as shown in FIG. 2 is erected. At this time, the reinforcing steel plates 2 are arranged so as to surround the column 1 with a certain gap between the reinforcing steel plate 2 and the column 1 facing each other.

[Steel Plate Connection Step] Standing steel plate 2 for reinforcement
Of the bolts 6
And fixedly connected to each other. At this time, the joints 4, 5
The concave and convex portions 4b and 5b are engaged with each other and brought into the above-described engagement state. Further, as shown in FIG. 3, a spacer 10 for securing a constant gap with the column 1 and a mortar to be injected later are sealed on the inner surface side at the upper end of the connected reinforcing steel plate 2. For this purpose, the sealing member 11 is attached by bonding or the like.

[Steel Lifting Step] Thereafter, as shown in FIG. 4, the assembled reinforcing steel plate 2 is lifted up along the column 1 and the upper end of the reinforcing steel plate 2 is 12
To the bottom. At this time, the temporary fixing bolt 13
Is passed through a temporary fixing through hole (not shown) formed in the lower part of the reinforcing steel plate 2, and a temporary fixing hole (FIG. 4) formed in the column 1 at a position corresponding to the temporary fixing through hole. (Not shown) to temporarily fix the steel plate 2 for reinforcement so as not to slip off. In this manner, the steel plate erecting step, the steel sheet connecting step, and the steel sheet lifting step are further repeated, and a plurality of reinforcing steel sheets 2 are temporarily attached to the entire peripheral surface of the column 1.

[Steel Plate Fixing Step] After all the reinforcing steel plates 2 are temporarily fixed, these reinforcing steel plates 2 are permanently fixed. At this time, the reinforcing steel plates 2 vertically adjacent to each other are connected and fixed by welding or the like. Then, the upper ends of the reinforcing steel plates 2 are sealed using the sealing members 11, respectively.

[Mortar injection step]
Is injected into the gap between the reinforcing steel plate 2 and the column 1 and filled, and is cured until it is sufficiently solidified. Thereafter, the mounting jig 9 is disassembled.

Next, a second embodiment of the present invention will be described with reference to FIG. In these figures, reference numeral 21 denotes a reinforcing steel plate, and reference numerals 22 and 23 denote joints.

The difference between the second embodiment and the first embodiment is that
While the joint portions 4 and 5 in the form are screwed with bolts 6 and the like inserted into the two pairs of through holes 4a and 5a, and connected and fixed by the plurality of uneven portions 4b and 5b, the second Parts 22, 2 of reinforcing steel plate 21 in the form
Reference numeral 3 is a point which is screwed by a bolt 24 or the like inserted into the pair of through holes 22a and 23a and is connected and fixed by the pair of concave and convex portions 22b and 23b.

That is, in the second embodiment, one through hole 22a and one uneven portion 2 are formed in the joint portion 22 arranged on the outer surface side.
2b is formed, while the joint portion 23 has the through hole 2
A through hole 23a having the same axis as 2a and an uneven portion 23b engaged with the uneven portion 22b are formed.

The bolt 2 is inserted into the through hole 23b from the inner surface side.
4 is inserted, and a bolt 24 penetrates through the through hole 23a and the through hole 22a to protrude toward the outer surface side,
A nut 25 is screwed onto the bolt 24 to join the joints 22,2.
3 is screwed and fixed. The bolt head of the bolt 24 is spotted and fixed to the joint 23 in advance after insertion into the through hole 23b. The uneven portion 22b,
23b, similarly to the first embodiment, are arranged in an engaged state with respect to the adjacent direction of the reinforcing steel plate 2, and form a pair of locking surfaces H which are in contact with each other and perpendicular to the adjacent direction of the reinforcing steel plate 21. Have been.

The structure for reinforcing a structure according to the second embodiment has advantages that the structure of the joints 22, 23 is simpler and the number of members is smaller than that of the first embodiment.

Next, a third embodiment of the present invention will be described with reference to FIG. In these figures, reference numeral 31 denotes a reinforcing steel plate, and reference numerals 32 and 33 denote joints.

The difference between the third embodiment and the second embodiment is that the through hole 32a of the joint portion 32 has a concave portion 32 formed on the outer surface side.
The bolt 34 is formed at the bottom of the joint b and is screwed into the female screw hole 33a formed in the joint portion 33 through the through hole 32a. That is, in the third embodiment, the bolt 34
Since the bolt head is stored in the recess 32b, it does not protrude to the outer surface side, so that the appearance and the like are improved. Further, since the bolt 34 is screwed into the female screw hole 33a, a nut is not required, and the number of members is further reduced.

Next, a fourth embodiment of the present invention will be described with reference to FIG. In these figures, reference numeral 41 indicates a reinforcing steel plate, and reference numerals 42 and 43 indicate joint portions.

The difference between the fourth embodiment and the third embodiment is that the outer surfaces of the reinforcing steel plates 41 adjacent to each other are formed by the joint portions 42, 4.
3 is also formed flush. That is, in the third embodiment, the joints 32 and 33 are entirely protruded on the outer surface side of the reinforcing steel plate 31, but the fourth embodiment is different from the fourth embodiment.
The joints 42 and 43 in the form have a stepped shape with the outer surface flush when overlapped, and are formed flush with the outer surface of the reinforcing steel plate 41. Further, since the tip of the bolt 44 and the nut 45 are housed in the concave portion 42 a formed on the outer surface side of the joint portion 42, no protrusion is formed on the outer surface of the reinforcing steel plate 41. Therefore, in the reinforcing structure according to the fourth embodiment, it is possible to easily attach a decorative plate or the like to the outer surface of the reinforcing steel plate 41 after construction, and the appearance is further improved.

In each of the above embodiments, the reinforcing structure for the column 1 has been described as a structure. However, another embodiment may be applied to another structure. For example, FIG.
(A), when reinforcing a column 51 having a rectangular cross-section and a large cross-sectional area, a plurality of L-shaped cross-section reinforcing steel plates 52 provided with any one of the above-described joints and When the column 51 is reinforced by surrounding and connecting the column 51 with a plate-shaped reinforcing steel plate 53, and when the column 61 is reinforced as shown in FIG. Reinforcement may be performed by surrounding and connecting the column 61 with a pair of half-cylindrical reinforcing steel plates 62 having such joints.

As shown in FIG. 9 (a), when reinforcing not the pillar but the beam 71, a pair of reinforcing members having a U-shaped cross section provided with any one of the joints of the above embodiments. Steel plate 72
Are connected to each other so as to be sandwiched from both sides of the horizontally extending beam 71 so as to be sandwiched therebetween.
High strength can be obtained even with a load such as bending applied to 1. Further, as shown in FIG.
In order to reinforce, the flat reinforcing steel plates 82 and 83 provided with any one of the joints of the above embodiments are connected and covered along the wall 81, and the peripheral edges of these reinforcing steel plates 82 and 83 are covered. By fixing the part to the floor part 84, the beam part 85, etc.,
High strength can be obtained even with a load applied to the wall surface of the wall 81.

In addition, although the uneven portion in each of the above embodiments extends along the side portion, it may be partially formed as long as the uneven portion is formed on the side portion. For example, a structure in which a plurality of concave and convex portions formed of a columnar convex portion and a concave portion having a circular cross section may be interspersed at intervals. In each of the above embodiments, the mortar 3 is injected into the gap between the structure and the reinforcing steel sheet to fix the structure to the reinforcing steel sheet. I do not care. For example,
It may be injected and filled with an epoxy resin.

[0033]

According to the present invention, the following effects can be obtained.
According to the reinforcing structure of the structure according to the present invention , the reinforcing steel sheet is fixed by screwing, and is provided with the concave and convex portions that engage with each other, so that the reinforcing steel sheet is not required to be connected by welding or the like. High strength can be obtained in the adjacent direction. In addition, since the reinforcing steel plate is fixed by simple work such as screwing, welding work and the like are greatly reduced, and a large-scale scaffold is not required, so that construction time is shortened and labor costs are greatly reduced. Cost reduction can be achieved. Furthermore, by assembling and connecting the steel plates for reinforcement according to the present invention manufactured by a factory, it is possible to reduce the variation in strength at the connection portions of the respective steel plates for reinforcement, and to obtain a high-quality reinforcement structure. Conventionally, it was necessary to perform painting on site after welding in order to perform a lot of welding.However, with the reinforcing structure of the present invention, the number of welds is greatly reduced, so that painting work on site is reduced. Can be. In addition, outside when we put
Has a step-shaped joint where the surface is flush with the outer surface
Since the recess for accommodating the screw member is formed in the
Appearance of the connected reinforcing steel plate without the material protruding from the outer surface
The reinforcing steel sheet and the outer surface of these reinforcing steel sheets.
In addition, when attaching a decorative board, etc.,
Become.

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional view showing a first embodiment of a structure for reinforcing a structure according to the present invention, and a cross-sectional view showing a joint portion.

FIG. 2 is a front view for explaining a steel plate erecting step of the construction method in the first embodiment of the structure for reinforcing a structure according to the present invention.

FIG. 3 is a schematic cross-sectional view for explaining a steel plate connecting step of the construction method in the first embodiment of the structural reinforcement structure according to the present invention.

FIG. 4 is a schematic cross-sectional view for explaining a steel plate lifting step of the construction method in the first embodiment of the structural reinforcement structure according to the present invention.

FIG. 5 is a cross-sectional view showing a joint portion in a second embodiment of the reinforcing structure for a structure according to the present invention.

FIG. 6 is a cross-sectional view showing a joint portion in a third embodiment of the reinforcing structure for a structure according to the present invention.

FIG. 7 is a cross-sectional view showing a joint portion in a fourth embodiment of the reinforcing structure for a structure according to the present invention.

FIG. 8 is a schematic sectional view showing another embodiment in which the reinforcing structure for a structure according to the present invention is applied to a large column and a column.

FIG. 9 is a schematic sectional view showing another embodiment in which the reinforcing structure for a structure according to the present invention is applied to beams and walls.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Column 2,21,31,41 Steel plate for reinforcement 2a, 2b Side part 3 Mortar 4,5,22,23,32,33,42,43 Joint part 4a, 5a, 22a, 23a, 32a Through hole 4b, 5b , 22b, 23b Uneven portion 6, 24, 34, 44 Bolt 7, 25, 45 Nut 12 Beam 32b, 42a Recess 33a Female screw hole 52, 53, 62, 72, 82, 83 Reinforcing steel plate 51 Column 61 Column 71 Beam 81 Wall H Locking surface

Continued on the front page. (72) Inventor Hisao Abe 1-3-2 Shibaura, Minato-ku, Tokyo Shimizu Corporation (72) Inventor Naoyuki Sugibashi 1-3-2 Shibaura, Minato-ku, Tokyo Shimizu Corporation In-house examiner Hiroaki Minamizawa (56) References JP-A-48-53523 (JP, A) JP-A-6-17486 (JP, A) JP-A-7-310379 (JP, A) (58) Field (Int.Cl. ⁷ , DB name) E04G 23/02 E04C 3/34 E04C 5/06

Claims (2)

(57) [Claims] 1. A structure in which a plurality of reinforcing steel plates are arranged adjacently on the surface of a structure to cover and connect with each other, and a curable filler is injected into a gap between the structure and the reinforcing steel plate. A reinforcing structure for a structure in which an object and a reinforcing steel plate are fixed to each other to form a reinforcement, and joint portions are formed on adjacent reinforcing steel plates so that their side portions are connected to each other in an overlapping state. joint together are linked by screwing together, the reinforcing uneven portion for restraining the movement of the adjacent direction of the engaging reinforcing steel to each other in overlapping surfaces of these joint portions are formed respectively, which are adjacent to each other Steel sheet joints are overlapped
The outer surfaces of the joints are flush with each other, and the joint portion disposed on the outer surface side is attached with a screw member.
The through-hole is formed on the outer surface of the joint portion, and the screw member is externally formed.
Formed on the bottom of the recess to be housed inside
Reinforcing structure of the structure, characterized in that that. 2. A plurality of reinforcing steel plates are provided next to the surface of the structure.
In addition to contacting and covering and connecting with each other, the structure
The hardening filler into the gap between the material and the reinforcing steel plate
To secure the structure and the steel plate for reinforcement
A reinforcing structure for a structure. Adjacent reinforcing steel plates have their side parts superimposed on each other.
Joints are formed, and these joints are connected with each other by screwing.
Both engage with each other on the overlapping surfaces of these joints.
The unevenness that restricts the movement of the reinforcing steel sheet in the
Respectively formed, the joint portion is screwed on both sides of the uneven portion
A reinforcing structure for a structure, characterized in that: