JP6616132B2 - 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 extrusion-molded plate attached in a vertical stack to a housing of a building.

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 longitudinal direction (vertical direction) generally occur on the vertically stacked extruded plates, the wall panel cannot secure the bending performance and shear performance, which are the basic performance required as a book wall, and left as it is. The panel may fall off in the event of an earthquake or strong wind. In particular, it is ideal to replace the panel as a countermeasure when a long vertical crack that extends over the entire length of the vertically formed extruded panel is generated. 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 conventional circumstances, and in a vertically 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 opened an injection hole at a predetermined position of the surface plate of the hollow portion where a crack has occurred, and injected and filled mortar into the hollow portion from the injection hole and cured. Thus, the inventors have found that the above-described problems can be solved, and have completed the present invention. 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 A method of repairing cracks generated in a substantially longitudinal direction in an extruded plate attached to a housing of a building so that the longitudinal direction is substantially vertical. ,
In the hollow portion where the crack is generated, an injection hole is formed at a predetermined position of the surface plate, and a receiving material is provided from the injection hole to the hollow portion immediately below the injection hole. A crack repairing method, characterized in that a solid columnar mortar fixing portion is formed in the hollow portion where the crack is generated by injecting, filling, and curing the mortar in the hollow portion.
[2]
The crack repairing method according to [1], wherein in the hollow portion where the crack is generated, the continuous mortar fixing portion is formed over the entire crack generation portion.
[3]
The crack repairing method according to [1], wherein a plurality of the mortar fixing portions are intermittently formed over the entire crack occurrence portion in the hollow portion where the crack occurs.
[4]
The crack repairing method according to any one of [1] to [3], wherein a confirmation hole is formed at a predetermined position above the injection hole, and the mortar fixing portion is formed between the injection hole and the confirmation hole. .
[5]
The repair of a crack according to any one of [1] to [4], wherein the mortar fixing part is formed from the injection hole to a position in the vicinity of the tip over the tip above the crack. Method.
[6]
The method for repairing a crack according to [5], wherein a confirmation hole is formed in a position near the tip part beyond the tip part above the crack, and the mortar fixing part is formed up to the confirmation hole part.
[7]
The dimension from the upper end position of the mortar injected beyond the top end of the crack to the position in the vicinity of the front end to the top end of the crack is 0 cm or more and 30 cm or less [5] or The crack repair method according to [6].
[8]
The crack repairing method according to [6], wherein the position of the confirmation hole that extends beyond the tip portion above the crack and is opened at a position near the tip portion is on a substantially extended line of the crack.
[9]
The crack repairing method according to any one of [1] to [8], wherein the mortar fixing portion is formed up to a position in the vicinity of the tip portion over a tip portion below the crack.
[10]
The crack repairing method according to [9], wherein the position of the injection hole that is opened at a position in the vicinity of the tip portion that extends beyond the tip portion below the crack is on a substantially extended line of the crack.
[11]
[9] or [9] or [30] in which the dimension from the position of the injection hole that extends beyond the tip of the crack and in the vicinity of the tip to the tip of the crack is 0 cm or more and 30 cm or less. 10]. The crack repair method according to 10].
[12]
Before the receiving material is inserted from the injection hole, it is a sponge-like foam larger than the cross-section of the hollow portion, and the receiving material is inserted by compressing the sponge-like foam from the injection hole. The method for repairing a crack according to any one of [1] to [11], wherein:
[13]
Any one of [1] to [12], wherein the receiving material is a balloon, and the receiving material is provided by inserting a balloon before inflating through the injection hole and inflating in the hollow portion immediately below the injection hole. The crack repair method described in Crab.
[14]
The receiving material is a foam formed by in-situ foaming of a foam material, and the receiving material is provided in the hollow portion directly below the hole by spraying the foam material from the injection hole . 13]. The repair method according to any one of [13].
[15]
The crack repairing method according to [14], wherein the foam is urethane.
[16]
Before injecting the mortar, a linear reinforcing material is inserted into the hollow portion from the injection hole, and the reinforcing material is caused to reside in the mortar fixing portion, according to any one of [1] to [15]. How to repair cracks.
[17]
[16] The reinforcing material according to [16], wherein the reinforcing material has a linear reinforcing material main body and two or more protrusions protruding from the reinforcing material main body in a direction substantially perpendicular to the axis of the reinforcing material main body. How to repair cracks.
[18]
The method for repairing a crack according to [17], wherein the protrusion is provided in the vicinity of both ends of the reinforcing material body.
[19]
The crack repairing method according to any one of [1] to [18], wherein the mortar is mixed with a binder made of a reaction curing type epoxy resin containing a main agent and a curing agent.
[20]
The crack repairing method according to any one of [1] to [19], wherein the mortar is mixed with glass powder, a glass balloon, or a meteorite powder.
[21]
The crack repairing method according to any one of [1] to [20], wherein glass fiber, carbon fiber, or steel fiber is mixed in the mortar.
[22]
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 at the place of use, and fill it in a softened state. The crack repair method according to [19].
[23]
The crack repairing method according to any one of [1] to [22], wherein the size of the injection hole is 10 mm or more and 50 mm or less.
[24]
The crack repairing method according to any one of [4], [6], and [8], wherein the size of the confirmation hole is 5 mm or more and 30 mm or less.
[25]
The crack repairing method according to any one of [1] to [24], wherein the mortar fixing part has a length of 50 mm or more.
[26]
The method for repairing a crack according to any one of [1] to [25], wherein the mortar is injected and filled from the injection hole, and then the injection hole is closed with a plug.
[27]
The crack repairing method according to any one of [4], [6], [8], and [24], wherein the mortar is injected and filled from the injection hole, and then the confirmation hole is closed with a plug.
[28]
The repair of a crack according to [26] or [27], wherein the injection hole and the confirmation hole closed with the plugging material are further filled with an irregular filler, and the surface of the surface plate is finished flat. Method.
[29]
The crack repairing method according to [28], wherein the amorphous filler is a mortar, a sealing material, or an epoxy resin-based putty material.
[30]
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]-[29] The crack repairing method according to any one of [1] to [29].
[31]
The crack repairing method according to [30], wherein the amorphous filler is a mortar, a sealing material, or an epoxy resin-based putty material.
[32]
At the upper end of the hollow part where the mortar fixing part is formed, an injection hole is formed in the surface plate below the upper end part, and a receiving material is provided in the hollow part directly below the injection hole, from the injection hole. The method for repairing a crack according to any one of [1] to [31], wherein mortar is injected and filled into the hollow portion and cured to close an upper end opening of the hollow portion.
[33]
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 A structure for repairing cracks generated in a substantially longitudinal direction in an extruded plate attached to a building frame so that the longitudinal direction is substantially vertical. And
An injection hole formed at a predetermined position of the surface plate of the hollow portion where the crack is generated; a receiving material provided in the hollow portion immediately below the injection hole; A crack repair structure characterized by having a columnar mortar adhering portion formed densely on the receiving member of the hollow portion.
[34]
[33] A building characterized in that the repair structure according to [33] is vertically mounted on the housing.

  According to the present invention, an injection hole is formed at a predetermined position of the surface plate of the hollow part where a crack is generated, a receiving material is provided in the hollow part immediately below the hole, and mortar is injected from the hole into the hollow part. By filling and curing to form the mortar fixing portion, the back surface plate can also be reinforced, and the panel can be provided with the necessary bending performance and shear 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 repair part. It is sectional drawing which expands and shows a repair part. It is sectional drawing of the repair part in the case of using a reinforcing material. It is sectional drawing which expands and shows an injection hole part. It is sectional drawing which expands and shows a confirmation 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 where cracks are generated in an extrusion-molded plate, and FIGS. 2 to 6 are diagrams for explaining a method for repairing the extrusion-molded 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 arranged so that the front side surface plate 2 is exposed and the longitudinal direction is substantially vertical, and is attached to the building frame in a so-called vertical stack (not shown). In the wall panel, a crack 6 is generated in the length direction (substantially vertical direction) of the wall panel along the hollow portion 5 in the surface plate 2.

According to the repairing method for the crack 6 of the present invention, an injection hole 10 is formed at a predetermined position of the surface plate 2 of the hollow part 5 where the crack is generated, and a receiving material is provided in the hollow part 5 immediately below the injection hole 10. 11 is provided (see FIG. 4), and mortar is injected and filled into the hollow portion 5 from the injection hole 10 and cured, whereby a solid columnar mortar fixing portion 12 is formed in the hollow portion 5 where cracks are generated. (See FIG. 5).
An injection hole 10 is formed in a predetermined position of the surface plate 2 of the hollow portion 5 where the crack 6 is generated in the extruded plate 1, and a receiving material 11 is provided in the hollow portion 5 immediately below the injection hole 10. 10 is used to inject and fill mortar into the hollow portion 5 of the extrusion-molded plate 1 to form a columnar strong mortar fixing portion 12 in the hollow portion 5 where the crack 6 is generated. Reinforce.
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 12 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 length direction (substantially vertical direction) in a so-called vertically stacked extruded plate, and is a surface plate 2. Having an injection hole 10 formed at a predetermined position of the surface plate 2 of the hollow portion 5 where the crack 6 is generated, and a columnar mortar fixing portion 12 formed in the hollow portion 5 above the injection hole 10 Become.
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.

As a method for repairing the crack, it is optimal to form a continuous solid columnar mortar fixing portion 12 in the entire cracked portion of the hollow portion 5 where the crack is generated. However, when the length of the crack 6 is long, it is troublesome to form a continuous solid columnar mortar fixing part in the hollow part of the entire crack occurrence part, and the cost of the mortar is expensive. Since it is uneconomical, when it is judged that there is a margin in strength, it is preferable to form a dense columnar mortar fixing part intermittently in a plurality of places. The reason why the length of the mortar fixing part 12 is not so large is that when the amount of mortar to be injected increases, the weight of the mortar acting on the receiving material 11 increases, and the receiving material 11 tends to slip off during construction. .
About the upper part of the crack 6, the upward extension of a crack can be suppressed by forming the solid columnar mortar fixing | fixed part 12 to the position of the vicinity beyond the front-end | tip part 14 above a crack.

  The injection amount (injection length) of the mortar is controlled by opening a confirmation hole 13 at a predetermined position above the injection hole 10, injecting the mortar from the injection hole 10, and stopping the injection when the mortar reaches the confirmation hole 13. it can. When the cross-sectional area of the hollow portion to be injected is known, the injection length can be calculated from the injection amount of the mortar. Therefore, when the injection amount of the mortar is known, the confirmation hole may not be formed.

In addition, by setting the position of the confirmation hole 13 in the vicinity of the upper end portion 14 above the crack on the substantially extended line of the crack, the crack extension can be blocked by the confirmation hole portion. The effect of stopping at the confirmation hole can be expected.
The dimension between the upper end position of the mortar injected up to a position near the tip portion 14 above the crack and the tip portion 14 above the crack is preferably about 0 to 30 cm. The larger this dimension, the stronger the mortar fixing part can reinforce the part where cracks are likely to extend, so the effect of preventing cracks can be expected, but this is uneconomical. A practical level size of about 3 to 10 cm is optimal.

About the downward direction of the crack 6, the downward extension of a crack can be suppressed by forming a solid columnar mortar adhering part to the position near the tip part 15 below the crack.
In addition, by setting the position of the injection hole 10 in the vicinity of the lower end of the crack beyond the tip 15 on the substantially extended line of the crack, the extension of the crack can be blocked by the injection hole, so the extension of the crack is prevented. The effect of stopping at the injection hole can be expected.
The dimension between the position of the injection hole 10 in the position near the tip 15 below the crack and the tip 15 above the crack is preferably about 0 to 30 cm. The larger this dimension, the stronger the mortar fixing part can reinforce the part where cracks are likely to extend, so the effect of preventing cracks can be expected, but this is uneconomical. The practical size is about 3 to 10 cm.

As the receiving material 11, a sponge-like foam, a balloon, an in-situ foam, or the like is used.
When the receiving material 11 is a sponge-like foam, it is a sponge-like foam larger than the cross section of the hollow portion 5 before being inserted from the injection hole 10, and the foam is compressed from the injection hole 10. The receiving material 11 is provided in the hollow portion directly under the injection hole 10 by being pushed in. If the foam has a weak repulsive force, the frictional resistance with the surroundings of the hollow portion 5 becomes small, and when the mortar is injected, the weight of the mortar may not be able to endure, and the foam may slide down. It is necessary to ensure sufficient frictional resistance by increasing the rate. For this reason, as the foam of the receiving material 11, a material having a high resilience after compression insertion and high resilience is preferable.

  When the receiving material 11 is a balloon, the receiving material 11 is provided by inserting the balloon before being inflated from the injection hole 10 and inflating it in the hollow portion 5 immediately below the injection hole 10. If the repulsive force after inflating is weak, the frictional resistance with the surroundings of the hollow portion 5 is reduced, and when the mortar is injected, the weight of the mortar cannot be withstood and it may slide down. It is necessary to ensure sufficient frictional resistance. In order to save the trouble of closing the air inlet after the balloon is inflated, it is convenient to use a balloon with a check valve.

  When the receiving material 11 is a foam formed by foaming foam material such as urethane in-situ, the receiving material 11 is provided in the hollow portion 5 immediately below the injection hole 10 by spraying the foam material from the injection hole 10. If it takes a long time for the foam to harden after the foam material is sprayed, mortar cannot be injected immediately. Therefore, it is preferable that the foam hardens quickly after foaming.

  It is sufficient for these receiving materials 11 to support the weight of the mortar until at least the mortar is hardened and integrated with the periphery of the hollow portion 5, and thereafter, for example, balloons and foams are deflated. It doesn't matter.

  As shown in FIG. 6, it is preferable that a linear reinforcing material 20 is included in the mortar fixing portion 12. Before injecting the mortar, it is preferable to insert a linear reinforcing material 20 into the hollow portion 5 from the injection hole 10 so that the reinforcing material 20 resides in the mortar fixing portion 12. The mortar fixing part 12 is reinforced by the reinforcing material 20. Thereby, the intensity | strength of the mortar fixed part 12 can further be raised and the mortar fixed part 12 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 injection hole 10, it can be easily inserted if it is a deformable material such as a wire.

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 protruding portion 22, and the mortar enters the space so that the mortar fixing portion 12 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. 6, the linear reinforcing member 20 included in the mortar fixing part 12 has four protrusions 22. Further, two of the four protrusions 22 are near both ends of the reinforcing member 20.

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 12 after curing can be brought close to the linear expansion coefficient of the extruded plate 1, and the weight of the mortar can be reduced. By making the linear expansion coefficient of the mortar fixing part 12 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 12 ( Can be prevented.
Furthermore, it is preferable that glass fiber, carbon fiber or steel fiber is mixed in the mortar. By mixing these, toughness can be given to the mortar fixing part 12 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 an epoxy resin-mixed mortar as a mortar, if an attempt is made to knead the material on site, operations such as weighing of the admixture, preparation of the kneading equipment, and washing are required, 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 as not to cure. 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.

In addition, the size of the injection 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 injection hole 10 is too small, it is difficult to insert the reinforcing member 20 from the injection hole 10. On the other hand, if the injection hole 10 is too large, the mortar injected after the injection easily leaks from the injection hole 10 and makes it difficult to close the injection hole 10. Therefore, the size of the injection hole 10 is preferably about 10 to 50 mm.
The size of the confirmation hole 13 to be opened in the surface plate 2 is not particularly limited, but if it is too small, the closing material 30 is difficult to insert. The size of the confirmation hole 13 is preferably about 5 to 30 mm.
Moreover, since sufficient intensity | strength cannot be ensured if the length of the mortar fixed part 12 formed in the hollow part 5 is too short, it is preferable that it is 50 mm or more.

FIG. 7 is an enlarged sectional view showing the injection hole 10. FIG. 8 is an enlarged cross-sectional view of the confirmation hole 13. After the injection hole 10 and the confirmation hole 13 are injected and filled with mortar from the injection hole 10, the fixed plug 30 is inserted from the injection hole 10 and the confirmation hole 13 while being compressed, and the bottom side of the injection hole 10 and the confirmation hole 13 is inserted. (The back side) is closed with a fixed closing material 30. Thereby, the backflow and leakage of the mortar from the injection hole 10 and the confirmation hole 13 can be prevented. The plugging material 30 is preferably a foamed material such as acrylic resin or polyurethane resin that does not slip due to friction between the injection hole 10 and the confirmation hole 13 and the plugging material after being inserted in a compressed state.
Further, as shown in FIGS. 7 and 8, the injection hole 10 and the confirmation hole 13 closed with the plugging material are further filled with an irregular filler 31, and the surface of the surface plate 2 is finished flat. Good. Thus, finishing such as painting can be performed without any trouble after the repair. The 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 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 amorphous filler 33 is an irregular filler such as a mortar, a sealing material, or an epoxy resin 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.

In addition, when the wall panel which consists of the extrusion molding board 1 is an outer wall, and the sealing material between panel joints cuts, etc. and water permeates (leakage), such as rainwater, from the exterior side, the water will be at the upper end of the panel There is a risk of entering the hollow portion 5 from the forehead and accumulating like a water column at the top of the mortar fixing portion 12 reinforced by injection.
Therefore, it is preferable to close the upper end opening of the hollow portion 5 of the mortar fixing portion 12 subjected to injection reinforcement. Specifically, as shown in FIG. 2, in the hollow portion 5 in which mortar is injected and filled and reinforced, an injection hole 40 is formed below the upper end of the panel, and a receiving material is provided in the hollow portion 5 immediately below the injection hole 40. The mortar fixing part 42 is formed by injecting, filling, and curing mortar into the hollow part 5 from the injection hole 10, and the upper end opening of the hollow part 5 is closed with the mortar fixing part 42. Thereby, the infiltration of water from the upper end of the panel can be prevented. In addition, when mortar is injected and filled at the upper end of the panel, if there is a gap between the upper end 1a of the panel and the upper portion 42a of the mortar fixing portion 42, there is a risk that water will accumulate in that portion. It is preferable that the upper part 42a of the part 42 is slightly larger than the upper end 1a of the panel.

  As described above, according to the present invention, in the vertically stacked extruded plate in which cracks are generated, an injection hole is formed at a predetermined position of the surface plate of the hollow portion where the crack is generated, and the injection hole is formed from the injection hole. The back surface plate can also be reinforced by providing a receiving material in the hollow portion directly below and injecting and filling mortar into the hollow portion from the injection hole and curing it to form a mortar fixing portion. In addition, it is possible to impart the necessary bending performance and shearing performance to the panel. Therefore, a simple and low-cost panel reinforcement work that is likely to be a large-scale construction of panel replacement can be completed by itself, 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 necessary for the panel can be secured, and it can be widely used as a repairing method for vertically stacked extruded plates.

1: Extruded plate (wall panel)
2, 3: Surface plate 4: Partition part 5: Hollow part 6: Crack 10: Injection hole 11: Receiving material 12: Mortar fixing part 13: Confirmation hole 14: Tip part above crack 15: Tip part below crack 20: Reinforcing material 21: Reinforcing material body 22: Protruding portion 30: Closing material 31: Filling material 32: Recessed portion 33: Filling material 40: Injection hole 41: Receiving material 42: Mortar fixing portion

Claims (34)

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 A method of repairing cracks generated in a substantially longitudinal direction in an extruded plate attached to a housing of a building so that the longitudinal direction is substantially vertical. ,
In the hollow portion where the crack is generated, an injection hole is formed at a predetermined position of the surface plate, and a receiving material is provided from the injection hole to the hollow portion immediately below the injection hole. A crack repairing method, characterized in that a solid columnar mortar fixing portion is formed in the hollow portion where the crack is generated by injecting, filling, and curing the mortar in the hollow portion.   The crack repairing method according to claim 1, wherein in the hollow portion where the crack is generated, the continuous mortar fixing portion is formed over the entire portion where the crack is generated.   The crack repairing method according to claim 1, wherein a plurality of the mortar fixing portions are intermittently formed throughout the crack occurrence portion in a hollow portion where the crack is generated.   The repair method of the crack as described in any one of Claims 1-3 which opens a confirmation hole in the predetermined position above the said injection hole, and forms the said mortar adhering part between this injection hole and this confirmation hole. .   The repair of a crack according to any one of claims 1 to 4, wherein the mortar fixing part is formed from the injection hole to a position in the vicinity of the tip part beyond the tip part above the crack. Method.   The crack repairing method according to claim 5, wherein a confirmation hole is formed at a position in the vicinity of the tip portion beyond the tip portion above the crack, and the mortar fixing portion is formed up to the confirmation hole portion.   The dimension from the upper end position of the mortar injected beyond the tip portion above the crack to a position near the tip portion to the tip portion above the crack is 0 cm or more and 30 cm or less. 6. The method for repairing a crack according to 6.   The crack repairing method according to claim 6, wherein a position of the confirmation hole that extends beyond a tip portion above the crack and is opened at a position in the vicinity of the tip portion is on a substantially extended line of the crack.   The crack repairing method according to any one of claims 1 to 8, wherein the mortar fixing part is formed up to a position in the vicinity of the tip part beyond a tip part below the crack.   The crack repairing method according to claim 9, wherein a position of the injection hole that is opened at a position in the vicinity of the tip portion that exceeds the tip portion below the crack is on a substantially extended line of the crack.   The dimension from the position of the injection hole, which is opened at a position in the vicinity of the tip portion, beyond the tip portion below the crack to the tip portion below the crack is 0 cm or more and 30 cm or less. Repair method for cracks described in 1.   Before the receiving material is inserted from the injection hole, it is a sponge-like foam larger than the cross-section of the hollow portion, and the receiving material is inserted by compressing the sponge-like foam from the injection hole. The crack repairing method according to any one of claims 1 to 11, wherein   The said receiving material is a balloon, The balloon before inflating is inserted from the said injection hole, The said receiving material is provided by inflating in the said hollow part directly under this injection hole, The any one of Claims 1-12 Repair method for cracks as described in the item. The said receiving material is a foam formed by foaming a foam material in-situ, and the said receiving material is provided in the said hollow part directly under this hole by injecting this foamed material from the said injection hole. The repair method as described in any one of.   The crack repairing method according to claim 14, wherein the foam is urethane.   Before injecting the mortar, a linear reinforcing material is inserted into the hollow portion from the injection hole, and the reinforcing material is contained in the mortar fixing portion, according to any one of claims 1 to 15. How to repair cracks.   The reinforcing material has a linear reinforcing material main body, and two or more protrusions protruding from the reinforcing material main body in a direction substantially perpendicular to the axis of the reinforcing material main body. How to repair cracks.   The method of repairing a crack according to claim 17, wherein the protrusion is provided in the vicinity of both end portions of the reinforcement main body.   The crack repairing method according to any one of claims 1 to 18, wherein the mortar is mixed with a binder made 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 19, wherein the mortar is mixed with glass powder, a glass balloon, or a meteorite powder.   The crack repairing method according to claim 1, 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 19.   The crack repairing method according to any one of claims 1 to 22, wherein a size of the injection hole is 10 mm or more and 50 mm or less.   The crack repairing method according to any one of claims 4, 6, and 8, wherein the size of the confirmation hole is 5 mm or more and 30 mm or less.   The crack repairing method according to any one of claims 1 to 24, wherein a length of the mortar fixing part is 50 mm or more.   The crack repairing method according to any one of claims 1 to 25, wherein the mortar is injected and filled from the injection hole, and then the injection hole is closed with a plugging material.   The method for repairing a crack according to any one of claims 4, 6, 8 and 24, wherein the mortar is injected and filled from the injection hole, and then the confirmation hole is closed with a plugging material.   28. The crack repairing method according to claim 27, wherein the injection hole and the confirmation hole closed with the plugging material are further filled with an irregular filler, and the surface of the surface plate is finished flat.   29. The method for repairing a crack according to claim 28, 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 crack repairing method according to any one of claims 1 to 29.   The crack repairing method according to claim 30, wherein the amorphous filler is a mortar, a sealing material, or an epoxy resin-based putty material.   At the upper end of the hollow part where the mortar fixing part is formed, an injection hole is formed in the surface plate below the upper end part, and a receiving material is provided in the hollow part directly below the injection hole, from the injection hole. The crack repairing method according to any one of claims 1 to 31, wherein a top end opening of the hollow portion is closed by injecting, filling, and curing the mortar in the hollow portion. 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 A structure for repairing cracks generated in a substantially longitudinal direction in an extruded plate attached to a building frame so that the longitudinal direction is substantially vertical. And
An injection hole formed in a predetermined position of the surface plate of the hollow portion where the crack is generated, a receiving material provided in the hollow portion directly below the injection hole, and the crack generation location A crack repair structure characterized by having a columnar mortar fixing part formed densely on the receiving member of the hollow part. 34. A building, wherein the repair structure according to claim 33 is vertically mounted on the housing.

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