JP4894478B2 - Exterior wall panel repair method and panel reinforcement hardware - Google Patents

Description

  The present invention relates to a method for repairing rectangular outer wall panels arranged at intervals as outer wall materials of a building, and a panel reinforcing hardware used therefor.

  For example, in a building of a thermal power generation facility, it has been conventionally practiced to arrange rectangular outer wall panels in a grid pattern with a space between each other, and to apply the joint material between the outer wall panels. It has been broken.

  This type of outer wall panel is often formed of a cement fiber reinforced panel (GRC panel or the like). This cement-based fiber reinforced panel is manufactured by simultaneously spraying slurry-like mortar and alkali-resistant glass fiber (roving: about 3 cm in length) on a formwork. The outer wall panel produced in this way is also equipped with a sound absorbing material for reducing the leakage of the noise of the power generation facility to the outside.

  By the way, wind pressure, seismic force, gravity and the like are applied to the outer wall panel. The wind pressure is alternately applied to the outer wall in a positive pressure (pressing direction) and a negative pressure (pulling direction). The seismic force acts alternately on the outer wall in the direction of working inward and in the direction of working outward. For this reason, if a crack occurs in the outer wall panel, the reinforcing fiber bearing the tensile force is cut, and the outer wall panel may collapse due to wind pressure, seismic force, and gravity.

  In order to prevent the outer wall panel from collapsing, it is necessary to replace or repair the cracked outer wall panel. In the building of a thermal power generation facility, there are many cases where it is impossible to dispose an outer wall panel by placing a worker inside the outer wall because of the relationship with the power generation facility. In that case, the worker performs the work of replacing the outer wall panel only from the outside of the building.

FIG. 15 shows an example of a replacement method for an outer wall panel conventionally employed. In this example, the gondola 1 is used to open holes 3 and 3 having a size that allows a hand and a head to be inserted into the outer wall panel P including the crack 2 to be replaced, and the outer wall panel P is attached to the column 4 and the like. By removing the nut of the embedded bolt, the outer wall panel P is suspended by the hanging wire 6 and replaced with a new outer wall panel. Patent Document 1 describes a technique in which a metal plate for reinforcing a precast concrete plate is provided on the back side of the precast concrete plate.
JP 2003-035008 A

However, these conventional methods have the following problems.
The first problem is due to the weight of the outer wall panel P. Although this type of outer wall panel P is equipped with a lightweight sound absorbing material, it has a length of 1 m, a width of 2 m, a thickness of 10 cm, and a weight of 160 kg. For this reason, there is a problem in that the work of replacing this is large-scale and requires labor, and the workability is poor.

  Second is the problem of replacement costs. Since the replacement work of the outer wall panel P is large and time-consuming, it is expensive. In particular, when replacing, it is necessary to produce a new outer wall panel P, which adds to the panel production cost and increases the cost.

  Therefore, the problem of the present invention is that the external wall panel is repaired while being reinforced with a dedicated reinforcing material, so that the workability is remarkably improved, and the repair cost is much lower than the replacement cost. The object is to provide a method of repairing the outer wall panel and the technology of the panel reinforcement hardware that can be completed by the above method.

In order to solve the above-mentioned problems, the present invention employs the following means.
The present invention is a method for repairing an outer wall panel in which rectangular outer wall panels formed of cement-based fiber reinforced panels are arranged at intervals from each other, and joint material is applied between the outer wall panels. A first step of removing the joint material present around the outer wall panel to be repaired, and a plate-like reinforcing material via an adhesive to the upper and lower side surfaces of the upper, lower, left and right side surfaces of the repair target outer wall panel 2nd process of attaching each, and 3rd process of attaching the box-shaped reinforcement which has the inner surface which covers the outer surface, the remaining two side parts, and the surface of each plate-shaped reinforcement with respect to the outer wall panel to be repaired And a fourth step of applying a joint material around the box-shaped reinforcing material.

  According to the present invention, the outer wall panel to be repaired is repaired by using the dedicated panel reinforcement hardware provided with the plate-like reinforcing material and the box-shaped reinforcing material, so that the outer wall panel to be repaired is sufficiently reinforced. be able to. In addition, since the outer wall panel to be repaired is attached so as to cover the box-shaped reinforcing material, the workability can be significantly improved as compared with the case where the outer wall panel which is a heavy object is replaced, and a metal plate or the like is used. When a reinforcement hardware that is easy to produce is used, the repair cost can be significantly reduced compared to the replacement cost.

  In the present invention, the third step includes a step of attaching the box-shaped reinforcing material to the reinforcing target outer wall panel with an adhesive and a step of fixing the box-shaped reinforcing material to the reinforcing target outer wall panel by screwing. Is desirable. As described above, by attaching the box-shaped reinforcing material to the reinforcing target outer wall panel by both the adhesive and the screwing, it is possible to reliably and highly accurately attach it by a simple operation.

  In the present invention, the outer wall panel has a horizontally long rectangular shape in which the dimension between the left and right side parts is larger than the dimension between the upper and lower side parts, and each plate reinforcing member extends along the upper and lower side parts of the outer wall panel. It is desirable to form in the shape of a rectangle, and the both side parts which follow the longitudinal direction are formed in the bending part bent toward the inner surface side mutually. Thus, by forming both side portions along the longitudinal direction of the plate-shaped reinforcing material in the bent portion, the shape of each plate-shaped reinforcing material in the longitudinal direction can be increased. Therefore, the rigidity of the outer wall panel can be increased by fixing the plate-like reinforcing material having increased rigidity to the upper and lower side surfaces of the outer wall panel with the adhesive.

  On the other hand, the present invention is a panel reinforcement hardware used for repairing a rectangular outer wall panel arranged at intervals as an outer wall material of a building, and includes four upper, lower, left and right side portions of the repaired outer wall panel. Among them, a plate-shaped reinforcing material attached to the upper and lower side surfaces via an adhesive, and the outer surface of the repaired outer wall panel, the remaining two side surfaces, and the surface of the plate-shaped reinforcing material And a box-shaped reinforcing material each having an inner surface to cover each other.

  According to the panel reinforcing metal fitting of the present invention, since it is configured to include two plate-shaped reinforcing members and one box-shaped reinforcing member, even if the interval (gap) between adjacent outer wall panels is small, the gap is used. First, it can be attached by inserting a plate-shaped reinforcing material. And, after installing the plate-shaped reinforcing material, it is possible to attach the box-shaped reinforcing material so as to cover the plate-shaped reinforcing material, thereby improving the reinforcing function of the outer wall panel and attaching the panel reinforcing hardware The work improving action can be effectively exhibited.

  Here, it is desirable that the plate-shaped reinforcing member is formed in a rectangular shape extending along the upper and lower side surface portions of the outer wall panel, and both side portions in the longitudinal direction are formed in bent portions that are bent toward the inner surface side. . In this way, both side portions in the longitudinal direction of the plate-shaped reinforcing material are formed in bent portions that are bent toward the inner surface side, so that the necessary rigidity can be given to the plate-shaped reinforcing material, and the side surface of the outer wall panel It becomes possible to make it the shape which follows a part.

  According to the present invention, by repairing the outer wall panel while reinforcing it with a dedicated reinforcing material, the workability is remarkably improved, and the repair cost can be significantly lower than the replacement cost. An outer wall panel repairing method and panel reinforcement hardware technology that can be obtained can be obtained.

  Preferred embodiments of the present invention will be described below with reference to the drawings. In the following embodiments, an example in which the repair technique according to the present invention is applied to the outer wall of a building of a thermal power plant will be described.

  FIG. 1 shows an outer wall portion of a building of a thermal power plant, where (a) is a partial elevation view of the building and (b) is a sectional view thereof. FIG. 2 is an external view of the outer wall panel. FIG. 3 is an external view showing the outer wall panel to be reinforced and the panel reinforcement hardware. In these drawings, parts common to those in FIG. 15 are denoted by the same reference numerals and description thereof is simplified.

  The outer wall portion of the building is constituted by a large number of outer wall panels P fixed to the outer side of the column 4 including the trunk edge and the like by the implantation bolts 5 a and the nuts 5. Each outer wall panel P is a horizontally long rectangular shape having a length of about 1 m, a width of 2 m, a thickness of 10 cm, and a weight of 160 kg, as described in the background art section, and is a plane rectangular grid with a space between each other. Are arranged side by side. A joint material 10 is provided between the outer wall panels P.

  The outer wall panel P is formed of a cement fiber reinforced panel (GRC panel). The cement-based fiber reinforced panel is produced by simultaneously spraying slurry-like mortar and alkali-resistant glass fiber (roving: about 3 cm in length) on a formwork. As shown in FIG. 4, the outer wall panel P is provided with a recess 7 on the inner surface side which is a surface facing the support column 4, and a sound absorbing material 8 is loaded in the recess 7. As shown by broken lines in FIG. 3, the recesses 7 are formed in two places in the horizontal direction.

  The sound absorbing material 8 exhibits a function of reducing the noise of the power generation facility from leaking to the outside and reducing the weight of the outer wall panel P. On the inner surface side of the outer wall panel P of the embodiment, a metal plate 9 having a function of a lid member of the recess 7 in which the sound absorbing material 8 is loaded is attached. The metal plate 9 is made of stainless steel punching metal in consideration of the sound absorption effect of the outer wall panel itself.

  In the embodiment, instead of replacing the outer wall panel P having the crack 2 as shown in FIG. 1, the concept of repairing using the panel reinforcing hardware K as shown in FIGS. 3 and 5 is adopted. The panel reinforcing hardware K is two plates that are respectively attached to the upper and lower side surface portions 11 and 12 through an adhesive among the upper and lower side surface portions 11, 12, 13, and 14 of the outer wall panel P to be repaired. The inner surface 30a (see FIG. 6) covers the outer surface 15, the remaining two left and right side surface portions 13, 14 and the surface of the plate-shaped reinforcing member 20 with respect to the outer reinforcement panel 20, 20 and the repair target outer wall panel P. ) Having a box-shaped reinforcing member 30.

  The plate-shaped reinforcing members 20 and 20 are formed in a rectangular shape extending along the upper and lower side surface portions 11 and 12 of the outer wall panel P, and bent portions 21 and 22 whose both longitudinal portions are bent toward the inner surface side. Are formed respectively. As described above, the both sides of the plate-shaped reinforcing member 20 in the longitudinal direction are formed in the bent portions 21 and 22 that are bent toward the inner surface side. It becomes possible to make it the shape which follows the side parts 11 and 12 of the outer wall panel P. FIG.

  In addition, since the edge on the outer surface 15 side of the outer wall panel P is formed larger than the edge on the inner surface 16 side, the bent portion 22 is formed larger than the bent portion 21 correspondingly.

  The box-shaped reinforcing material 30 is formed in a flat box shape in which only one surface is opened by bending and welding a steel plate. Specifically, it is formed of one surface plate 31 having a planar rectangular shape, upper and lower side plates 32 and 33, and left and right side plates 34 and 35. However, portions where the surface plate 31 and the upper and lower side plates 32 and 33 are continuous are formed on the tapered surfaces 32 a and 33 a so as to correspond to the bent portions 22 of the plate-like reinforcing member 20.

  According to the panel reinforcing hardware K of this embodiment, since it is configured to include two plate-shaped reinforcing members 20 and one box-shaped reinforcing member 30, the interval (gap) S between adjacent outer wall panels P is small. Alternatively, the plate-like reinforcing member 20 can be first inserted by using the gap S. And after attaching the plate-shaped reinforcing material 20, it is set as the structure which can attach the box-shaped reinforcing material 30 so that the plate-shaped reinforcing material 20 may be covered, the reinforcement function improvement effect | action of the outer wall panel P, and a panel The effect of improving the mounting work of the reinforcing hardware K can be effectively exhibited.

Next, a panel repair method using the panel reinforcing hardware K will be described.
In the panel repairing method of this embodiment, as shown in FIGS. 1 and 7, first, a step (first step) of removing the existing seal (joint material) 10 existing around the outer wall panel P to be repaired is performed.

  Next, the plate-shaped reinforcing member 20 is attached to the upper and lower side surface portions 11 and 12 among the upper and lower side surface portions 11, 12, 13 and 14 of the repair target outer wall panel P via an adhesive (not shown). The process (2nd process) which attaches 20 each is performed. The plate-like reinforcing members 20 and 20 are preferably attached by applying an adhesive to the inner surfaces thereof and then inserting them into the gaps S (see FIG. 4) between the upper and lower outer wall panels.

  When the plate-like reinforcing member 20 is attached, it is preferable that the plate-like reinforcing member 20 is sufficiently pressed against the upper and lower side surface portions 11 and 12 until the adhesive is cured to a necessary degree. For example, as shown in FIG. 11, a spacer 36 can be inserted between the plate-like reinforcing members 20 adjacent to each other in the vertical direction.

  If necessary, before or after the second step, a plurality of internally threaded anchors 50 (four corners of the outer wall panel) for fixing the box-shaped reinforcing material 30 to the outer wall panel P to be repaired are provided. 4 places nearby and 2 places in the middle). For example, as shown in FIG. 8, a hole 52 is opened in the outer wall panel P to be repaired by an electric drill 51, and an adhesive 54 is injected into the hole 52 by an injection tool 53 as shown in FIG. Insert and install.

  Next, for the outer wall panel P to be repaired, a box-shaped reinforcing member 30 having an inner surface 30a that covers the outer surface 15, the remaining two left and right side portions 13, 14 and the surface of each plate-like reinforcing member 20 is provided. An attaching step (third step) is performed.

In this third step, the box-shaped reinforcing material 30 is fixed to the reinforcing target outer wall panel P by screws and the box-shaped reinforcing material 30 is fixed to the reinforcing target outer wall panel P by screwing. It is desirable to include the process of carrying out. Thus, by attaching the box-shaped reinforcing material 30 to the reinforcement target outer wall panel P by both the adhesive and screwing, it is possible to reliably and highly accurately attach it by a simple operation.

  Here, in the case where an adhesive is used, in order to enhance mutual adhesion and hardening, the entire inner surface 30a of the box-shaped reinforcing member 30, the outer surface 15 of the outer wall panel P to be reinforced, the side portions 13 and 14 on both sides, and the plate-shaped reinforcing member. It is preferable to apply to both of the 20 surfaces. In the case of fixing by screwing, it is preferable to fix the head-mounted bolt 55 by screwing it with an electric box wrench 56 into an anchor 50 provided in advance as shown in FIG. In that case, a bolt hole is provided in advance in the portion of the box-shaped reinforcing material 30 corresponding to the anchor 50.

  When the panel reinforcing hardware K is attached as described above, a step (fourth step) of applying the joint material 10 around the box-shaped reinforcing member 30 is performed as shown in FIG. In the fourth step, in addition to the joint material 10, finishing work such as touch-up of the reinforced outer wall panel P (including painting of fixing bolts with a head) is performed and completed.

  According to the embodiment, the outer wall panel P to be repaired can be sufficiently repaired by repairing the outer wall panel P to be repaired using the dedicated panel reinforcement hardware K including the plate-like reinforcing member 20 and the box-shaped reinforcing member 30. It can be repaired while reinforcing. Further, since the outer wall panel P to be repaired is attached so as to cover the box-shaped reinforcing material 30, the workability can be significantly improved as compared with the case where the outer wall panel P which is a heavy object is replaced. By using reinforcement hardware that is easy to produce, the repair cost can be reduced significantly compared with the replacement cost.

  In addition, the present condition of a cracked outer wall panel and a reinforcement strength test result are shown in FIG. Here, experimental results (positive pressure direction), experimental results (negative pressure direction), wind pressure during design (positive and negative pressure directions), GRC reference strength during design, current panel statistical processing strength (minimum positive pressure direction) Value) and statistical processing strength (minimum value in the negative pressure direction) of the current panel are shown for panels A to D and steel plate reinforcing panel (1) to steel plate reinforcing panel (6), respectively. The following points were confirmed based on the experimental results.

(A) The strength of the cracked outer wall panel does not satisfy the standard strength when newly installed in both the positive and negative directions. (B) Panel A is the current panel, and panels B, C, and D are panels whose surfaces are steel sheet, polyester lining, and epoxy lining. Panel A has breaking strength in both positive and negative directions. For panels B, C, and D, the positive direction is the breaking strength, and the negative direction is the maximum load on the machine.
(C) Steel plate reinforcement panels (1), (2), (3), and (4) have confirmed the reference strength at the time of design in the positive direction and have not yet been destroyed.
(D) The steel plate reinforcing panel (3 ′) returns the load applied to the panel of (3), and the load is applied in the positive direction again, but it has not yet been destroyed.
(E) Steel plate reinforcing panels (5) and (6) have been confirmed to have positive strength and have not yet been destroyed.

According to this embodiment, the following effects can be obtained.
(I) Attach a plate-shaped reinforcing material (reinforcement hardware) made of stainless steel [] to the top and bottom of the outer wall panel using elastic epoxy adhesive, and then attach a box-shaped reinforcing material from above. Reinforced outer wall panels were able to satisfy the new standard strength in both the positive and negative directions.
(Ii) If the outer wall panel having cracks is reinforced with a steel plate, it can be restored to the strength at the time of new installation.
(Iii) A cracked outer wall panel could be reinforced by using a panel reinforcing hardware (a box-shaped reinforcing material and upper and lower plate-shaped reinforcing materials) of about 20 kg as a set and an elastic epoxy adhesive.
(Iv) The weight is lighter than the outer wall panel and the workability is good.
(V) It could be reinforced at half the cost of replacing the outer wall panel.

  In the above embodiment, the present invention is applied to the outer wall portion of the building of the thermal power plant. Basically, the outer wall of another building in which heavy outer wall panels are arranged at intervals. The same applies to the part.

The outer wall part of the existing building where this invention is applied is shown, (a) is a partial elevation, (b) is the sectional drawing. It is an external view of the existing outer wall panel to which this invention is applied. It is an external view which shows the reinforcement outer wall panel and panel reinforcement metal fitting which concern on the Example of this invention. It is a partially omitted sectional view of the outer wall panel to be reinforced according to the embodiment of the present invention. It is a partially abbreviate | omitted sectional view of the reinforcement outer wall panel and plate reinforcement which concern on the Example of this invention. It is a partially omitted cross-sectional view of the outer wall panel to be reinforced, the plate-shaped reinforcing material, and the box-shaped reinforcing material according to the embodiment of the present invention. It is a perspective view which shows the repair method (existing seal removal process) which concerns on the Example of this invention. It is a perspective view which shows the repair method (drilling process) which concerns on the Example of this invention. It is a perspective view which shows the repair method (adhesive agent injection | pouring process) which concerns on the Example of this invention. It is a perspective view which shows the repair method (anchor insertion process) which concerns on the Example of this invention. It is a perspective view which shows the repair method (spacer insertion process) which concerns on the Example of this invention. It is a perspective view which shows the repair method (screwing process) which concerns on the Example of this invention. It is a perspective view which shows the repair method (joint seal hitting process) which concerns on the Example of this invention. It is explanatory drawing which shows the reinforcement strength test result of the repair method which concerns on the Example of this invention with a graph. It is an elevation view illustrating a conventional repair method (replacement) of the outer wall panel.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Gondola 2 Crack 3 Hole 4 Strut 5 Nut 5a Planting bolt 6 Wire 10 Joint material 11, 12 Upper and lower side surface parts 13, 14 Left and right side surface parts 15 Outer surface 16 Inner surface 20 Plate-shaped reinforcing material 21, 22 Bending part 30 Box type reinforcement Material 31 Surface 32, 33 Upper and lower side plates 34, 35 Left and right side plates 36 Spacer P Outer wall panel K Panel reinforcement hardware

Claims (5)

A rectangular outer wall panel formed by cement-based fiber reinforced panels is arranged with a space between each other, and a method for repairing an outer wall panel in which joint material is applied between the outer wall panels,
A first step of removing the joint material present around the outer wall panel to be repaired;
A second step of attaching a plate-like reinforcing material to the upper and lower side surfaces of the repair target outer wall panel through the adhesive to the upper and lower side surfaces;
A third step of attaching a box-shaped reinforcing material having an inner surface covering the outer surface, the remaining two left and right side surface portions, and the surface of the reinforcing metal plate to the repair target outer wall panel;
And a fourth step of applying joint material around the box-shaped reinforcing material.   In the third step, the step of attaching the box-shaped reinforcing material to the reinforcing target outer wall panel with an adhesive, and the step of fixing the box-shaped reinforcing material to the reinforcing target outer wall panel by screwing, The repair method of the outer wall panel of Claim 1 characterized by the above-mentioned.   The outer wall panel has a horizontally long rectangular shape in which the dimension between the left and right side parts is larger than the dimension between the upper and lower side parts, and the plate-like reinforcing member has a rectangular shape extending along the upper and lower side parts of the outer wall panel. The method for repairing an outer wall panel according to claim 1, wherein the outer wall panel is formed at a bent portion that is bent toward the inner surface side. Panel reinforcement hardware used for repairing rectangular outer wall panels arranged at intervals as outer wall materials of a building,
A plate-like reinforcing material attached via an adhesive to the upper and lower side surface portions of the four upper and lower side surfaces of the repair target outer wall panel;
A panel reinforcing hardware comprising a box-shaped reinforcing member having an inner surface that covers an outer surface of the repaired outer wall panel, two left and right side portions, and a surface of the plate-shaped reinforcing member. .   The said plate-shaped reinforcing material is formed in the rectangular shape extended along the up-and-down side part of the said outer wall panel, The both sides part of the longitudinal direction is formed in the bending part bent toward the inner surface side mutually. Panel reinforcement hardware described in 1.

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