JP6616130B2 - Method for repairing cracks in extrusion-molded plate and repair structure - Google Patents

Description

  The present invention relates to a repair method and a repair structure for cracks in an extruded plate that is horizontally mounted on a building frame.

In general, when a crack occurs in a concrete structure, (1) a method of injecting epoxy resin into the crack to reinforce, and (2) a recess by V-cutting or U-cutting the surface of the crack. And a method of flattening the recess by filling the recess with an epoxy resin putty or the like (see, for example, Patent Document 1).
When a crack is generated in a wall panel made of an extruded plate, there is a high possibility that the crack is generated not only on the front surface plate but also on the back surface plate. Then, when cracks in the width direction (vertical direction) generally occur on the horizontally extruded panels, the wall panel cannot secure the bending and shear performances that are the basic performance required for a book wall, and if left as it is, an earthquake will occur. The panel may fall off during strong winds. Therefore, when a vertical crack occurs in a horizontally stacked extruded plate panel, it is ideal to replace the panel as a countermeasure. However, in order to replace the panels in an actual building, the interior side is affected and the construction becomes large. Therefore, repairs and reinforcements are unavoidably performed in the above manner.

However, in the method of (1), since the thickness of the surface plate of the extrusion-molded plate is as thin as about 10 to 20 mm, before the epoxy resin to be injected spreads in the surface direction along the crack from the injection portion, the back side of the surface plate It leaks out to the (hollow part side) immediately. Therefore, in order to continuously fill the epoxy resin along the crack, the interval between the injection portions must be narrowed, and there is a problem that the number of injection portions increases, which is troublesome and uneconomical. On the other hand, when the crack width is 0.3 mm or less and narrow, this method has a problem that the epoxy resin cannot be filled to the deep part of the crack, so that a sufficient reinforcing effect cannot be expected. Also, this method has a problem that when the width of the crack is wide, the epoxy resin is dripped, and the epoxy resin is not filled in the crack densely and a defective portion is formed, so that sufficient strength cannot be expected.
Therefore, the method of (2) is more general as a repair or reinforcement method when cracks are generated on the extruded plate. However, both methods (1) and (2) repair and reinforce only the surface plate on the front side of the extruded plate, and cracks in the partition wall and the back side surface plate cannot be reinforced. There was a problem that necessary bending performance and shearing performance could not be sufficiently secured.

JP-A-8-28063

  The present invention has been devised in view of such a conventional situation, and in a laterally stacked extruded plate in which cracks have occurred, the back surface plate can also be reinforced, and the bending performance and shear required for the panel can be reinforced. An object of the present invention is to provide a crack repairing method and a repair structure that can sufficiently ensure performance.

As a result of diligent investigations, the present inventors have found that the above problem can be solved by making a hole in the surface plate near the crack, injecting and filling mortar into the hollow portion from the hole, and curing. It came to complete. That is, the present invention is as follows.
[1]
A pair of substantially rectangular surface plates arranged substantially in parallel, a plurality of partition walls extending in the longitudinal direction of the surface plate and integrally joining the pair of surface plates at a predetermined interval, and the adjacent partition walls In the extrusion plate attached to the housing of the building so that the longitudinal direction is a substantially horizontal direction, a method for repairing cracks generated in the width direction,
A hole is formed in the vicinity of the crack in the surface plate, and mortar is injected and filled from the hole into the hollow portion to be hardened, so that the solid portion of the columnar mortar is fixed to the hollow portion so as to straddle the crack. A method of repairing a crack, characterized by forming.
[2]
The crack repairing method according to [1], wherein a linear reinforcing material is inserted into the hollow portion from the hole before the mortar is injected, and the reinforcing material is included in the mortar fixing portion.
[3]
The reinforcing material according to [2], including a linear reinforcing material body and two or more protrusions protruding from the reinforcing material body in a direction substantially perpendicular to the axis of the reinforcing material body. How to repair cracks.
[4]
The method for repairing a crack according to [3], wherein the protrusion is provided in the vicinity of both ends of the reinforcing material body.
[5]
The reinforcing material has a linear reinforcing material main body and a string-like body attached near the center of the reinforcing material main body,
After the reinforcement body is inserted into the hollow portion, the mortar is injected in a state where the central portion of the reinforcement body and the position of the hole are substantially aligned by pulling the string-like body from the outside of the hole. The crack repairing method according to any one of [2] to [4], wherein the crack is filled to form the mortar fixing portion.
[6]
The crack repairing method according to any one of [1] to [5], wherein the mortar is mixed with a binder composed of a reaction curing type epoxy resin containing a main agent and a curing agent.
[7]
The crack repairing method according to any one of [1] to [6], wherein the mortar is mixed with glass powder, a glass balloon, or a meteorite powder.
[8]
The crack repairing method according to any one of [1] to [7], wherein glass fiber, carbon fiber, or steel fiber is mixed in the mortar.
[9]
After kneading the mortar mixed with the binder composed of an epoxy resin, store it frozen at a low temperature of -5 ° C or lower so as not to cure, thaw it at the place of use, and fill it in a softened state. The crack repairing method according to [6].
[10]
The crack repairing method according to any one of [1] to [9], wherein the hole has a size of 10 to 50 mm.
[11]
The crack repairing method according to any one of [1] to [10], wherein the mortar fixing part has a length of 50 mm or more.
[12]
The repair method according to any one of [1] to [11], wherein the mortar fixing portion is formed substantially equally to the left and right with respect to the crack or the hole.
[13]
The crack repairing method according to any one of [1] to [12], wherein the mortar fixing portion is formed in the plurality of hollow portions with respect to the same crack.
[14]
The crack repairing method according to any one of [1] to [13], wherein the mortar fixing part is formed also in the hollow part where the crack is not generated on the extension line of the crack.
[15]
The crack repairing method according to any one of [1] to [14], wherein after filling and filling the mortar from the hole, the hole is closed with a plugging material.
[16]
The crack repairing method according to [15], wherein the hole blocked with the plugging material is further filled with an irregular filler, and the surface of the surface plate is finished flat.
[17]
The crack repairing method according to [16], wherein the amorphous filler is a mortar, a sealing material, or an epoxy resin-based putty material.
[18]
A concave portion is formed by V-cutting or U-cutting the surface of the surface plate along the crack with respect to the crack, and the concave portion is filled with an indeterminate filler, and the surface of the surface plate is finished flat. [1]-[17] The crack repair method according to any one of [1] to [17].
[19]
The crack repairing method according to [18], wherein the amorphous filler is a mortar, a sealing material, or an epoxy resin-based putty material.
[20]
A pair of substantially rectangular surface plates arranged substantially in parallel, a plurality of partition walls extending in the longitudinal direction of the surface plate and integrally joining the pair of surface plates at a predetermined interval, and the adjacent partition walls In the extruded plate attached to the housing of the building so that the longitudinal direction is substantially horizontal, a repair structure for cracks generated in the width direction. ,
A crack repairing structure comprising: a hole formed in the vicinity of the crack in the surface plate; and a columnar mortar fixing portion that is densely formed in the hollow portion so as to straddle the crack. body.
[21]
[20] A building characterized in that the repair structure according to [20] is mounted horizontally on the housing.

  According to the present invention, the surface plate on the back side can be reinforced by making a hole in the surface plate near the crack, injecting and filling mortar into the hollow portion from the hole, and curing to form a mortar fixing portion. It is possible to give the panel the necessary bending performance and shearing performance at the crack occurrence location. Therefore, a simple and low-cost panel reinforcement work that would otherwise be a large-scale construction of panel replacement can be completed, and the construction period is short and economical.

It is a perspective view which shows the state which the crack has produced in the extrusion molding board. It is a plane perspective view for demonstrating the repair method of an extrusion molding board. It is sectional drawing in the AB line in FIG. It is sectional drawing which expands and shows a reinforcement part. It is sectional drawing of the reinforcement part in the case of using a reinforcing material. It is sectional drawing which expands and shows a hole part. It is sectional drawing which expands and shows a crack repair part.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view showing a state in which cracks are generated in an extruded plate, and FIGS. 2 to 5 are diagrams for explaining a method of repairing the extruded plate.
As shown in FIG. 1, the extrusion-molded plate 1 is made of cement or the like, and extends in the longitudinal direction of the pair of substantially rectangular surface plates 2 and 3 disposed substantially in parallel and the pair of surface plates 2 and 3. The plurality of partition walls 4 for integrally joining the surface plates 2 and 3 at a predetermined interval, and the hollow portion 5 defined between the adjacent partition walls 4.
The wall panel made of the extruded plate 1 is disposed so that the front surface plate 2 is exposed and the longitudinal direction is substantially horizontal, and is attached to a building frame in a so-called horizontal stack (not shown). In the wall panel, cracks 6 are generated in the width direction (substantially vertical direction) of the wall panel so as to intersect the plurality of hollow portions 5 in the surface plate 2.

As shown in FIGS. 2 and 4, the method for repairing a crack 6 according to the present invention is to make a hole 10 in the vicinity of the crack 6 in the surface plate 2, and inject and fill mortar into the hollow portion 5 from the hole 10 to cure. Thus, a dense columnar mortar fixing part 11 is formed in the hollow part 5 so as to straddle the crack 6.
A hole 10 is formed in the vicinity of the occurrence of the crack 6 in the extrusion plate 1, mortar is injected and filled from the hole 10 into the hollow portion 5 of the extrusion plate 1, and the columnar strong so as to straddle the crack 6 in the vicinity of the crack 6. The formation part of the crack 6 is reinforced by forming the mortar adhering part 11 which is easy.
When the injected mortar is hardened, the hollow portion 5 of the extrusion-molded plate 1 and the injected mortar are integrated, so that the occurrence location of the crack 6 can be strongly reinforced. Further, as shown in FIG. 3, the penetration of water from the crack 6 can be prevented by the mortar fixing portion 11 by tightly integrating the periphery of the hollow portion 5 and the columnar mortar without a gap.

The crack repair structure of the present invention thus obtained is a repair structure for cracks generated in the width direction (substantially vertical direction) in a so-called horizontal stacked extrusion plate, It has the hole 10 opened in the vicinity of the crack 6, and the columnar mortar adhering part 11 formed in the hollow part 5 so that the crack 6 may be straddled.
In such a repair structure, the back surface plate 3 is also reinforced, and has a bending performance and a shear performance necessary for the panel.

Although the position where the hole 10 is opened is not particularly limited, it is necessary to avoid the position of the partition wall portion 4 so that the hole 10 penetrates the hollow portion 5. Moreover, if the hole 10 is away from the position of the crack 6, the amount of mortar to be injected increases. For this reason, the position immediately above the hole 10 is optimal as the position of the hole 10, but it is preferable that the position be as close to the crack 6 as possible even if the position is not directly above the crack 6 for some reason.
The viscosity of the mortar is not particularly limited, but if it is too low, it will flow and a gap will be formed between the periphery of the hollow portion 5. On the other hand, if the viscosity is too high, it is hard and difficult to inject. Therefore, the viscosity of the mortar is preferably such that the mortar can maintain its shape after injection.

  As shown in FIG. 4, it is preferable that a linear reinforcing material 20 is included in the mortar fixing part 11. Before injecting the mortar, it is preferable to insert a linear reinforcing material 20 from the hole 10 into the hollow portion 5 so that the reinforcing material 20 is present in the mortar fixing portion 11. The mortar fixing part 11 is reinforced by the reinforcing material 20. Thereby, the intensity | strength of the mortar fixed part 11 can further be raised, and the mortar fixed part 11 can be given toughness. In other words, the reinforcing member 20 plays the same role as the reinforcing bar in the reinforced concrete. The reinforcing material 20 is preferably a high-strength material such as a steel material such as a reinforcing bar or a molded product of reinforced plastic. Further, when the reinforcing member 20 is inserted from the small hole 10, for example, a deformable material such as a wire can be easily inserted.

The reinforcing member 20 has a linear reinforcing member main body 21 and two or more protrusions 22 protruding from the reinforcing member main body 21 in a direction substantially perpendicular to the axis of the reinforcing member main body 21. Is preferred. A certain amount of space (fogging) can be secured between the periphery of the hollow portion 5 and the reinforcing material main body 21 by the protrusion 22, and the mortar enters the space so that the mortar fixing portion 11 and the reinforcing material 20 Adhesion can be ensured. As the linear reinforcing material main body 21, for example, a long bolt and as the protruding portion 22, for example, a nut can be considered. For example, the linear reinforcing member 20 having the protrusions 22 can be easily formed by screwing a plurality of nuts (protrusions 22) to the long bolts (reinforcing material main body 21).
In addition, the number and position of the protrusions 22 are not particularly limited, but the adhesive force between the mortar and the reinforcement 20 can be increased by making two of the protrusions 22 near both ends of the reinforcement 20. It can be suitably secured. In the example shown in FIG. 4, the linear reinforcing member 20 included in the mortar fixing part 11 has four protrusions 22. Further, two of the four protrusions 22 are near both ends of the reinforcing member 20.

Further, as shown in FIG. 5, the reinforcing member 20 preferably has a string-like body 23 attached in the vicinity of the central portion of the reinforcing member main body 21. After the linear reinforcing member 20 is inserted into the hole 10, the end of the string-like body 23 is drawn from the outside of the hole 10, and the vicinity of the central portion of the linear reinforcing member 20 and the position of the hole 10 are substantially matched. Inject and fill the mortar. Thereby, the reinforcing material 20 can be arrange | positioned near the center of the mortar fixed part 11, and the strong mortar fixed part 11 can be formed.
The material of the string-like body 23 is not particularly limited, and examples thereof include small-diameter string-like materials such as embroidery thread, kite thread, fishing line, rubber thread, and wire. The string-like body 23 may be cut on the inner side of the hole 10 by strongly pulling after the installation position of the reinforcing member 20 is determined, or after determining the position, the string-like body 23 is not cut. It doesn't matter if you pack it in the back side.

It is preferable that glass powder, a glass balloon or a meteorite powder (silica powder) is mixed in the mortar. By mixing these, the linear expansion coefficient of the mortar fixing part 11 after curing can be brought close to the linear expansion coefficient of the extrusion-molded plate 1, and the weight of the mortar can be reduced. By making the linear expansion coefficient of the mortar fixing part 11 close to the linear expansion coefficient of the extrusion molding plate 1, skin separation due to a differential movement due to heat shock or the like at the interface between the inner wall side of the hollow part 5 and the mortar fixing part 11 ( Can be prevented.
Furthermore, it is preferable that glass fiber, carbon fiber or steel fiber is mixed in the mortar. By mixing these, the mortar fixing part 11 can have toughness and strength can be increased.

The mortar is mixed with a reaction curable epoxy resin composed of a main agent and a curing agent or cement as a binder for curing the mortar, and a reaction curable epoxy resin is particularly preferable.
In addition, when using mortar mixed with epoxy resin, if the material is to be kneaded on site, operations such as weighing of the admixture, preparation of the kneading equipment, and washing are necessary, which is difficult to perform on site. Therefore, when using an epoxy resin-mixed mortar, it is kneaded in advance at a factory or the like with a predetermined preparation, and after kneading, it is stored frozen at a low temperature of -5 ° C. or lower so that curing does not proceed. A method of using the epoxy resin-mixed mortar in a softened state by leaving it naturally at the place of use or thawing it by immersing it in warm water is suitable.

Further, the size of the hole 10 opened in the surface plate 2 is not particularly limited, but if it is too small, the resistance at the time of injecting the mortar increases and the working efficiency deteriorates. Further, if the hole 10 is too small, it is difficult to insert the reinforcing member 20 from the hole 10. On the other hand, if the hole 10 is too large, the mortar injected after the injection is likely to leak from the hole 10 and it is difficult to close the hole 10. Therefore, the size of the hole 10 is preferably about 10 to 50 mm.
Moreover, since sufficient intensity | strength cannot be ensured if the length of the mortar fixed part 11 formed in the hollow part 5 is too short, it is preferable that it is 50 mm or more. It is preferable that the mortar fixing part 11 formed in the hollow part 5 is substantially uniform from the position of the crack 6 or the hole 10 to the left and right for balance. In addition, the strength can be increased as the number of places where the mortar for the same crack 6 is injected, filled and reinforced is increased.

  It is preferable to form the mortar fixing part 11 in the plurality of hollow parts 5 with respect to the same crack 6. It is optimal to fill and reinforce mortar in all the hollow portions 5 where cracks 6 are generated, but filling and reinforcing mortar into all the hollow portions 5 is laborious and uneconomical. Therefore, when it is determined that there is a margin in strength, etc., the hollow portions 5 may be injected, filled, and reinforced with a certain interval, such as every other hollow portion 5.

  As shown in FIG. 2, when the crack 6 stops in the middle of the panel width instead of the entire panel width, the crack 6 is likely to extend further on the extension line, so that it is shown as the reinforcing portion 7. In addition, mortar is injected and filled into the hole 10 opened near the extension position of the crack 6 in the hollow portion 5 where the crack 6 does not occur, on the extension line of the crack 6, and the vicinity of the crack 6 is also reinforced. It is preferable to do. Thereby, the overall panel performance (bending performance, shearing performance) of the cross section where the crack 6 is generated can be enhanced. At this time, it is preferable that the mortar fixing part 11 formed in the hollow part 5 is substantially uniform from the position of the hole 10 to the left and right for balance.

FIG. 6 is an enlarged sectional view showing the hole 10. In the hole 10, mortar is injected and filled from the hole 10, and then the fixed plug 30 is inserted from the hole 10 while being compressed, and the bottom side (back side) of the hole 10 is plugged with the fixed plug 30. Thereby, the backflow and leakage of mortar from the hole 10 can be prevented. As the plugging material 30, a foamed material such as an acrylic resin or a polyurethane resin that does not slip due to the frictional force between the hole 10 and the plugging material 30 after being inserted in a compressed state is suitable.
Further, as shown in FIG. 6, the hole 10 closed by the plugging material 30 may be further filled with an irregular filler 31 to finish the surface of the surface plate 2 flat. Thus, finishing such as painting can be performed without any trouble after the repair. The amorphous filler 31 is, for example, a mortar, a sealing material, or an epoxy resin-based putty material.

  Further, the vicinity of the crack 6 is reinforced by the above-described method, and the surface of the surface plate 2 is V-cut or U-cut along the crack 6 for the crack 6 as shown in FIG. Thus, the recess 32 may be formed, and the recess 32 may be filled with the filler 33 to finish the panel surface side flat. The filler 33 is an amorphous filler such as a mortar, a sealing material, and an epoxy resin-based putty material. Thus, the panel performance (bending) is formed by combining the part where the mortar fixing part is formed by drilling the hole and the part where the crack is cut and filled with the filler in the entire cross section where the crack 6 is generated. Performance, shear performance). Moreover, the water leak from the location where the crack 6 occurs can be prevented.

  As described above, according to the present invention, in a laterally-extrusion molded plate in which cracks have occurred, a hole is made in the surface plate near the crack, and mortar is injected and filled from the hole into a hollow portion, and cured, and the mortar fixing portion By forming, the back surface plate can also be reinforced, and the bending performance and shear performance necessary for the panel can be imparted to the crack occurrence location. Therefore, a simple and low-cost panel reinforcement work that would otherwise be a large-scale construction of panel replacement can be completed, and the construction period is short and economical.

  Although the embodiment of the present invention has been described above, the present invention is not limited to this, and can be appropriately changed without departing from the spirit of the invention.

  By using the crack repairing method according to the present invention, sufficient bending performance and shearing performance required for the panel can be ensured, and it can be widely used as a repair method for horizontally stacked extruded plates.

1: Extruded plate (wall panel)
2, 3: Surface plate 4: Partition part 5: Hollow part 6: Crack 7: Reinforcement place 10: Hole 11: Mortar fixing part 20: Reinforcement material 21: Reinforcement material body 22: Projection part 23: String-like body 30: Blocking Material 31: Filler 32: Recess 33: Filler

Claims (21)

A pair of substantially rectangular surface plates arranged substantially in parallel, a plurality of partition walls extending in the longitudinal direction of the surface plate and integrally joining the pair of surface plates at a predetermined interval, and the adjacent partition walls In the extrusion plate attached to the housing of the building so that the longitudinal direction is a substantially horizontal direction, a method for repairing cracks generated in the width direction,
A hole is formed in the vicinity of the crack in the surface plate, and mortar is injected and filled from the hole into the hollow portion to be hardened, so that the solid portion of the columnar mortar is fixed to the hollow portion so as to straddle the crack. A method of repairing a crack, characterized by forming.   The crack repairing method according to claim 1, wherein a linear reinforcing material is inserted into the hollow portion from the hole before the mortar is injected, and the reinforcing material is included in the mortar fixing portion.   The said reinforcing material has a linear reinforcing material main body and two or more protrusion parts which protruded from the said reinforcing material main body in the substantially perpendicular direction with the axis | shaft of this reinforcing material main body. How to repair cracks.   The method of repairing a crack according to claim 3, wherein the protrusion is provided in the vicinity of both ends of the reinforcing material body. The reinforcing material has a linear reinforcing material main body and a string-like body attached near the center of the reinforcing material main body,
After the reinforcement body is inserted into the hollow portion, the mortar is injected in a state where the central portion of the reinforcement body and the position of the hole are substantially aligned by pulling the string-like body from the outside of the hole. The crack repairing method according to any one of claims 2 to 4, wherein the crack is filled to form the mortar fixing portion.   The crack repairing method according to any one of claims 1 to 5, wherein the mortar is mixed with a binder composed of a reaction curing type epoxy resin containing a main agent and a curing agent.   The crack repairing method according to any one of claims 1 to 6, wherein the mortar is mixed with glass powder, a glass balloon, or a meteorite powder.   The crack repair method according to any one of claims 1 to 7, wherein glass fiber, carbon fiber, or steel fiber is mixed in the mortar.   After kneading the mortar mixed with the binder composed of an epoxy resin, store it frozen at a low temperature of -5 ° C or lower so as not to cure, thaw it at the place of use, and fill it in a softened state. The method of repairing a crack according to claim 6.   The crack repairing method according to any one of claims 1 to 9, wherein the size of the hole is 10 to 50 mm.   The crack repairing method according to any one of claims 1 to 10, wherein a length of the mortar fixing part is 50 mm or more.   The repair method as described in any one of Claims 1-11 with which the said mortar adhering part is formed in the left-right substantially equal with respect to the said crack or the said hole.   The method for repairing a crack according to any one of claims 1 to 12, wherein the mortar fixing part is formed in the plurality of hollow parts with respect to the same crack.   The method for repairing a crack according to any one of claims 1 to 13, wherein the mortar fixing part is formed also in the hollow part at a place where the crack is not generated on the extension line of the crack.   The crack repairing method according to any one of claims 1 to 14, wherein the mortar is injected and filled from the hole, and then the hole is closed with a plugging material.   The crack repairing method according to claim 15, wherein the hole closed by the plugging material is further filled with an irregular filler, and the surface of the surface plate is finished flat.   The crack repairing method according to claim 16, wherein the amorphous filler is a mortar, a sealing material, or an epoxy resin-based putty material.   A concave portion is formed by V-cutting or U-cutting the surface of the surface plate along the crack with respect to the crack, and the concave portion is filled with an indeterminate filler, and the surface of the surface plate is finished flat. The repair method of the crack as described in any one of Claims 1-17.   The crack repairing method according to claim 18, wherein the amorphous filler is a mortar, a sealing material, or an epoxy resin-based putty material. A pair of substantially rectangular surface plates arranged substantially in parallel, a plurality of partition walls extending in the longitudinal direction of the surface plate and integrally joining the pair of surface plates at a predetermined interval, and the adjacent partition walls In the extruded plate attached to the housing of the building so that the longitudinal direction is substantially horizontal, a repair structure for cracks generated in the width direction. ,
A crack repairing structure comprising: a hole formed in the vicinity of the crack in the surface plate; and a columnar mortar fixing portion that is densely formed in the hollow portion so as to straddle the crack. body. 21. A building comprising the repair structure according to claim 20 mounted horizontally on the housing.

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