JPH1193374A - Covering synthetic alc earthquake resisting repairing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an earthquake resisting repairing method to perform to perform joining through covering with a fresh covering material without removing the existing deteriorated ALC outer wall (a high temperature and pressure- cured light cellular concrete panel) of a building and have a durability combined with reinforcement and neat decoration. SOLUTION: Drilling is effected on an existing ALC panel 1, and a bolt 4 is attendantly attached to substrate steel products 3, such as existing angles, through this hole 2. A covering material 6, such as metallic panels, is securely fixed at the bolt 4 by a mounting metal fitting 5 for self-standing (fixed at a structural body). By joining together the covering material 6 and the existing ALC panel 1, the existing ALC panel 1 and a fresh panel are formed integrally with each other for covering and synthesizing them. This constitution improves repair and reinforcement of the ALC panel, neat decoration, and earthquake resisting performance.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for repairing an ALC outer wall of a building (a lightweight aerated concrete panel cured with high-temperature and high-pressure steam = ALC panel). In particular, the present invention relates to a seismic retrofitting method for covering and joining an existing ALC building exterior material with a new covering material.

[0002]

2. Description of the Related Art ALC panels 17 to 18 years after construction have been used in recent years due to the lack of waterproof performance due to material deterioration, the possibility of spalling and the appearance of dirt, as well as the lack of seismic performance of joints etc. according to the old standard. The standards require repairs and reinforcements as ineligible outer walls. Conventional general exterior wall repair methods include: a method of attaching the coating material directly to the existing ALC panel or attaching it directly with bolts, etc. b Method of removing the ALC panel and replacing it with a new one c Painting the existing ALC panel is there. When repairing the outer wall of a building without removing and replacing the existing ALC panel, painting and the like are common, and in practice, repair, reinforcement, and beauty are performed with the existing deteriorated ALC panel in place. At present, there is no simple coating rehabilitation method that can improve the equipment and seismic resistance.

[0003]

The conventional method has the following problems.

[0004] Among the above-mentioned conventional methods, the method B, in which the existing ALC panel is peeled and removed, and the ALC panel is attached again, can restore the outer wall, but the construction is eventually the same as the original one, and the construction takes a long time. There is a problem that it is long and enormous cost, industrial waste is generated, and it is difficult to meet the demand for shortening the construction period and economic demand.

As for the repairing method c by painting, various paints have recently been developed and can be expected to have a certain repairing effect such as a cosmetic effect and a cover effect. This is another step, and many issues remain.

[0006] In the method a, in which the covering material is directly attached to the existing ALC panel, the construction is relatively simple and no industrial waste such as rubble is produced, but the load that the existing ALC panel itself and its joints bear is increased. This effectively increases the risk of spalling. Usually, the ALC panel after 17 to 18 years has deteriorated, does not have the strength to support the coating material, and there is a risk that the coating material may peel off.

Thus, there has been a long-awaited need for a construction method capable of preventing peeling and improving earthquake resistance without peeling off the existing ALC panel.

[0008]

SUMMARY OF THE INVENTION The present invention provides a construction method that meets the above-mentioned demands at low cost and with short-term construction without producing industrial waste. It proposes a construction method for coating. Among the construction methods for the ALC panel outer wall, it is particularly suitable for repairing the ALC panel outer wall created by the vertical wall slide construction method (FIGS. 1 and 2).

[0009] An existing ALC panel (1) is perforated, and a bolt (4) is attached to the existing steel material (3) such as an angle through the hole (2), and a mounting bracket (5) is attached to the bolt (4). By directly fixing the coating material (6) such as a metal panel to make it self-supporting, and joining this coating material (6) and the existing ALC panel (1), the existing ALC panel is firmly kept as it is. Can be repaired with the coating material (6).

In the present invention, a hole (2) is formed by a drill or the like near a mounting portion of an existing ALC panel (1) forming a building wall or the like, and the existing ALC panel (1) is formed through the hole (2). A bolt (4) is stud welded to a base steel material (3) such as an angle to which 1) is mounted, and the bolt (4) and a mounting bracket (5) are used to cover a metal panel or other covering material (6).
Is directly fixed to the structural frame (7) to be self-supporting, and the covering material (6) and the existing ALC panel (1) are bonded at an arbitrary point or the protrusion (8) on the back surface of the covering material (6) is attached to the existing Coating synthetic type AL characterized in that the coating material (6) and the existing ALC panel (1) are joined by fixing in the holes (9) or grooves (9) provided in the ALC panel (1).
It is C-seismic repair method.

A hole (2) is drilled in the existing ALC panel (1) to expose a base steel material (3), and a bolt (4) is attached thereto by stud welding, and a nut ( 1
At 0), a substantially L-shaped mounting bracket (5) is fixed in a side view, and a hollow rectangular box-shaped covering material (6) is mounted on the mounting bracket (5). The substantially L-shaped mounting bracket (5) connects one piece to the bolt (4) welded to the base steel material (3) as described above, and to the other piece, the bolt (11) for fixing the covering material (6). ). Small holes (12) are formed in the upper end surface and the lower end surface of the rectangular box-shaped coating material (6). Bolts (11) for fixing the coating material (6) are used to reduce the size of the coating material (6). Hole (1
2) is inserted, and the coating material (6) is sequentially connected and fixed. Note that the small holes (12) are not directly formed on the upper end surface or the lower end surface of the covering material (6), but the panel having the small holes (12) is attached on the upper end surface or the lower end surface of the covering material (6). May be. The protrusion thickness of the repair outer wall can be adjusted according to the conditions such as the thickness of the coating material (6) and the unevenness of the outer wall.

By providing a change in the edge shape of the covering material (6), it is easy to change the strength by connecting to each other without gaps to form a flat surface, or by providing a reinforcing piece inside the covering material (6). is there. When the covering material (6) is formed in a hollow rectangular box shape, the gap on the back side becomes an air layer, so that it also has a heat insulating and sound insulating effect.
The covering material (6) preferably has a reinforcing member provided therein. The reinforcing member is a lattice-like or honeycomb-like member, or a truss-like metal member in which pyramid projections are assembled.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a coating synthetic formula A according to the present invention
One embodiment of the LC seismic retrofitting method will be described with reference to the drawings. FIG. 1 is a perspective view of the construction state, and FIG. 2 is a side sectional view of the construction state. The ALC panel (a lightweight foam concrete panel cured by high-temperature and high-pressure steam) is described by a vertical wall slide construction method and is used for explaining a repair method. It is. In the figure, the entire existing outer wall is a base steel material such as a ruler angle (3)
A vertical reinforcing plate (13) is fixed to a vertical fitting plate (14), and joint reinforcing bars (13) are provided in holes (15) provided on both sides of the ALC panel (1), and the ALC panel (1) is attached. Configuration. The ALC panel (1) on the existing outer wall
It is formed by a so-called vertical wall slide method in which the upper portion is attached by a slide flyer plate, the lower portion is attached by a joint reinforcing bar (13), and the upper portion can freely move in the horizontal direction in the plane.

First, an existing ALC for forming a building wall or the like is used.
Clean panel (1) as much as possible. It is permissible to apply a waterproof paint or the like after washing with water or, if desired, after cleaning, and other chemical treatments are also possible.

First step: A hole (2) is formed near the mounting portion of the ALC panel (1) with a drill or the like. In the embodiment of FIG. 1, two holes (2) are provided at intervals in the horizontal direction. The hole (2) is formed at an appropriate place facing the base steel material (3) with a minimum number and taking into consideration the strength of holding the coating material (6) and the ALC panel (1) to be bonded and coated. You. The hole (2) opened in the ALC panel (1)
The underlying steel material (3) such as an angle is exposed. Numerous holes (2) are drilled at appropriate places on the entire wall surface.

Second step: Existing A through the hole (2)
A short steel bolt (4) is attached to a base steel material (3) such as an angle to which the LC panel (1) is attached. The stud welding is easily and firmly provided at such a position as to protrude horizontally from the front surface of the wall. The gap in the hole (2) passing through the bolt (4) is closed by the filler.

Third step: Mounting bracket (5) on bolt (4)
Is fixed. The mounting bracket (5) is a metal piece bent in a substantially L-shape when viewed from the side, and has a small hole at the center of each bending piece. The bolt (4) is inserted into one small hole, and the nut (10) is inserted.
Fix with. A short bolt (11) is attached to the other small hole with the upper and lower ends protruding. The installation of the short bolts (11) may be performed by welding in advance, or the coatings (6) may be sequentially fixed according to the assembling order.

Fourth step: A covering material (6) such as a metal panel is attached to short bolts (11) of a substantially L-shaped mounting bracket (5) fixed to the base steel material (3). The coating material (6) is connected to and fixed to the structural frame (7) and becomes independent. At this time, the covering material (6) and the existing ALC panel (1) are bonded at an arbitrary point or a hole (9) in which a projection (8) on the back surface of the covering material (6) is provided in the existing ALC panel (1). Or, it is fixed in the groove (9). The covering material (6) and the existing ALC panel (1) are integrally joined and the existing ALC panel (1)
Will be more firmly connected to the structural frame (7),
It can prevent peeling and increase connection strength to increase earthquake resistance and strength. The covering material (6) has a rectangular box shape with two small holes (12) formed on the upper and lower short edges, respectively, but the shape, material, color and the like are limited to this. Not something. In addition, coating material (6) and existing ALC panel (1)
Since a gap is formed between them, use of this gap (use of wiring, lighting, advertisement, etc.) can also be expected. The gap can be filled with a foam material or the like and used for other purposes (such as noise reduction and heat insulation).

[0019]

Next, a description will be given of an embodiment of a coating synthetic ALC seismic retrofitting method according to the present invention.

As a renovation and renovation work on the building wall, a rectangular box-shaped aluminum alloy having a thickness of 1,2 mm is press-molded, stainless steel truss mesh reinforcing materials are arranged inside the box, and two small rims are provided on the upper and lower short edges, respectively. The repair work was tried using the covering material (6) having the configuration in which the holes (12) were formed.
The truss mesh reinforcement is a truss-shaped metal member in which pyramid protrusions are assembled. 0.6m thick for further comparison
A coating material (6) was made of a stainless steel plate having a length of m, and repair work was attempted. A projection (8) was provided on the back side of the covering material (6).

After marking a predetermined perforated portion on the surface of the existing ALC panel, a large number of holes (2) were continuously drilled with a drill to expose the angle (3). Similarly, the existing A
On the surface of the LC panel, a hole (9) was drilled at a position corresponding to the projection (8) of the coating material (6).

At the exposed point of the angle passing through the hole (2), a reinforcing screw (4) threaded on the front side is stud-welded, and a filler is injected into the gap between the hole (2) and the bolt (4). While closing, a mounting bracket (5) provided with a short bolt (11) projecting up and down in advance was fixed with a nut (10).

The above operation was performed continuously, and a large number of mounting brackets (5) were arranged in a row on the wall surface. Next, in order from the bottom,
The covering material (6) is loaded into the short bolt (11) while inserting the two small holes (12) on the short side edge. At this time, the projections (8) of the coating material (6) are simultaneously pressed into the holes (9) on the surface of the ALC panel (1) and joined. The covering material (6) and the existing ALC panel (1) are integrated and further firmly fixed to the base steel material (3). Windproof and rainproof weather treatment such as installation of a frame is applied around the entire outer wall. By this construction method, an outer wall with aesthetic robustness and improved earthquake resistance was achieved.

[0024]

The coating synthetic ALC seismic retrofitting method according to the present invention and its construction method have the following specific effects.

The coating material and the existing ALC panel form a composite structure and behave as one, so that higher rigidity and strength than the sum of the individual performances can be obtained.

The covering material is directly fixed to the structural frame and becomes independent and supports the existing ALC panel. Therefore, the strength of the joint portion as a synthetic panel is increased, and the covering material has seismic resistance such as peeling resistance and spalling resistance. Make improvements possible.

Since the waterproof property, heat insulating property, strength, etc. possessed by the existing ALC panel can be utilized, it is possible to perform economical and efficient repair.

The coating material is not closely attached to the ALC panel, but is mechanically fixed to the structural frame, so that the coating material is not warped or bent without being affected by the difference in temperature expansion and drying shrinkage.
Makes a beautiful appearance.

As described above, the coating synthetic formula A according to the present invention
The LC seismic retrofitting method has a short construction period, can create an earthquake-resistant outer wall without producing industrial waste, and is an excellent invention that meets various demands for reform.

[Brief description of the drawings]

FIG. 1 is a perspective view of a construction for explaining a coating synthetic ALC seismic retrofitting method according to the present invention.

FIG. 2 is a side cross-sectional view of an outer wall on which a coated synthetic ALC seismic retrofitting method is applied.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Existing ALC panel 2 Hole 3 Base steel material 4 Bolt 5 Mounting bracket 6 Covering material such as metal panel 7 Structural body 8 Protrusion 9 Hole or groove 10 Nut 11 Bolt 12 Small hole 13 Joint reinforcing bar 14 Fixture 15 Hole for joint reinforcing bar

Claims (4)

[Claims] 1. An existing ALC panel (1) is perforated and a base steel material (3) such as an existing angle is passed through the hole (2).
A cover (6) such as a metal panel is directly fixed to the bolt (4) with a mounting bracket (5) to be self-standing, and the cover (6) and an existing ALC panel ( 1) Coating synthetic ALC characterized by joining
Seismic retrofitting method. 2. An existing ALC panel (1) forming a building wall or the like is drilled in the vicinity of a mounting portion of the existing ALC panel (1) with a drill or the like, and a base such as an angle to which the existing ALC panel (1) is mounted through the hole (2). A bolt (4) is stud-welded to a steel material (3), and a covering (6) such as a metal panel is attached to the bolt (4) with a mounting bracket (5), and the covering (6) is a structural body (7). The coating material (6) and the existing ALC panel (1) are adhered at an arbitrary point or the projection (8) on the back surface of the coating material (6) is attached to the existing ALC panel (1). A coating material (6) and an existing ALC panel (1), which are fixed to the holes (9) or grooves (9) provided in the ALC panel.
Seismic retrofitting method. 3. The method according to claim 1, wherein the coating material (6) has a rectangular box shape. 4. The method according to claim 1, wherein the mounting bracket (5) is substantially L-shaped.