JP2008231701A - Seismic and exterior thermal insulation structure and construction method for existing wooden houses - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simultaneously exhibit seismic resistance and heat insulation by constructing a seismic reinforcing layer 11 and a heat insulating layer 12 integrally on an existing building outer wall 8 and simultaneously performing renovation work from the outside of the building at the same time. Provide a building outer wall reinforcement structure and reinforced construction method that can halve.
[Means] A reinforcing holding frame is fixed to the outer periphery of the opening of the building, and the lower edge 11B and the upper edge 11A of the adhesive mortar layers 15 and 17 having the fiber net 16 are fixed to the base 3 and the girder 4 of the building, respectively. Then, the net interior mortar seismic layer 11 is formed on the entire surface of the building outer wall 8, and the heat insulating layer 12 is adhered to the surface of the seismic layer, and the fireproof mortar 20 is applied to form the seismic / heat insulating reinforcing wall 9. .
[Selection] Figure 2

Description

The present invention relates to a construction method and a structure for simultaneously providing seismic reinforcement and an outer heat insulating structure to an outer wall of an existing wooden house.

Conventional seismic reinforcement work is a construction method (Non-Patent Document 1) that adds a short amount of braces and walls in the frame and is carried out from the inside of the building. It was carried out from the outside of the building (Non-Patent Document 2) on the outer peripheral surface of the building, and since the two repair works were carried out separately, the latter period was long and uneconomical.

Japan Building Disaster Prevention Association "Summary of Disaster Prevention Technology Evaluation for Houses" (September 1, 2006) "Earthquake Safety Method" Hokkaido Construction Department Architectural Guidance Division, issued March 2005

The present invention allows the seismic reinforcement layer and the heat insulating layer to be integrated on the outer wall of the building so that the earthquake resistance and the heat insulating property can be exhibited simultaneously and the repair work can be performed from the outside of the building all at once, and the repair cost and work period can be halved. It provides a building outer wall reinforcement structure and a reinforced construction method.

The seismic / heat-insulating reinforcement structure of the present invention has a seismic layer made of a net-interior mortar in which a fiber net is embedded in a resin mortar. In addition to being provided on the existing outer wall surface, a heat insulating layer made of a heat insulating block is closely integrated with the surface of the net interior mortar seismic layer, and these are coated with a fireproof mortar.
In the present invention, the existing outer wall surface and the net interior mortar seismic layer are preferably separated from each other rather than being joined. Therefore, a synthetic resin sheet or the like is interposed, and then the mortar for forming the seismic layer is applied. It is good to work.
Moreover, the net interior mortar seismic layer and the heat insulating block adhered thereto are held by a reinforcing holding frame fixed to the outer periphery of the existing frame at the opening of the building.

The construction method of the present invention peels and removes part of the outer wall of the building to expose the side surfaces of the foundation and the girder and fixes the reinforcing holding frame to the outer periphery of the opening of the building, and then on the outer wall surface excluding the opening of the building. The separation sheet is temporarily attached with an adhesive or the like.
Thereafter, resin mortar is applied to the base and the side surfaces of the girders and the sheet surface, and a fiber reinforced net is interposed, and the resin mortar is further applied to form a net interior mortar layer.
Next, the upper and lower edges of the net-interior mortar layer are fixed to the base and girders with a nail or the like at predetermined intervals, and the heat-resistant layer is brought into close contact before the adhesive strength of the mortar is reduced.
The net interior mortar is solidified to form a laminated bonded plate body to form an earthquake resistant layer and a heat insulating layer. After that, the reinforced wall is obtained by coating the seismic layer and heat insulation layer with fire mortar.
The reinforcing holding frame is formed by forming a channel member made of metal such as aluminum or steel having a U-shaped cross section into a square shape or a gate shape, and is preferably capable of sandwiching the earthquake resistant layer and the block.
The fiber net is a two-dimensional or three-dimensional fabric made of aramid fiber, carbon fiber, glass fiber, etc., and has a mesh interval of 3 to 20 mm.
The resin mortar is a mixed composition of epoxy resin and sand, or adhesive polymer, cement, sand and the like.
The thickness of the seismic layer is usually 15 to 35 mm, the thickness of the heat insulating layer (commercially available molded product such as expanded polystyrene) is 15 mm or more, and the coating thickness of fireproof mortar is 20 mm or more.
In addition, the finishing layer by finishing mortar can also be coated on the surface of fire prevention mortar.

According to the reinforced structure of the present invention, not only earthquake-proofing and external heat insulation work can be performed simultaneously, but also there is an advantage that these work can be carried out without entering the building, and the work is facilitated.
In addition, the reinforcing holding frame can not only reinforce the opening but also reinforce the entire wall.
Furthermore, since the seismic layer of the present invention integrally holds the heat insulating block and is also integrated with horizontal members such as a base and a girder (beam), a strong seismic structure can be realized.

Best Mode for Carrying Out the Invention

The structure of the present invention will be described below with reference to the construction method.
In the figure, 1 is an existing wooden house, 2 is a cloth foundation, 3 is a foundation, 4 is a girder or beam, 5 is an opening such as a doorway or window, 6 is a sash or other existing frame, 7 is a pillar, 8 Is the outer wall.
9 is a reinforcing wall formed on the surface of the outer wall 8, and 10 is a rectangular or gate-shaped metal holding frame fixed around the opening, and serves to hold the reinforcing wall and reinforce the opening.
The reinforcing wall 9 is constituted by a close contact body of the seismic layer 11 and the heat insulating layer 12, and the seismic layer is formed by a resin mortar in which a fiber net is embedded and solidified to form a foam molded product that forms a heat insulating layer. Is integrated with the seismic layer.

The seismic layer 11 is constructed as follows.
In advance, the holding frame 9 is fixed to the outer periphery of an opening such as a window frame, and the outer walls of the base and the girder are peeled and removed 13 to expose the side surfaces of the base 3 and the girder 4 (FIG. 2A).
Next, in order to prevent the existing outer wall surface and the earthquake-resistant layer from coming into close contact with each other, a sheet material 14 such as vinyl is temporarily fixed to the resin mortar construction surface of the outer wall with an adhesive or the like.
A resin mortar is embedded in the outer wall removal portion 13 and a resin mortar base layer 15 is applied to the sheet surface, a fiber net 16 is applied to the entire surface, and a resin mortar 17 is further applied to form a net interior mortar NM. The edge 11A and the lower edge 11B are fixed with nails 18 at predetermined intervals along the beam 4 and the base 3, respectively (FIG. 2B).

The block-like heat insulating material 19 is pasted before the top coat mortar 17 is solidified.
After that, fireproof mortar 20 is applied to the entire outer surface to form the reinforcing wall 9 (FIG. 2C).
The seismic layer 11 in which the net interior resin mortar NM has been solidified by the above-described construction is fixed as a laminated bonding plate between the base of the house and the girders, and combined with the heat insulating block 19 to form a strong reinforcing wall. Constitute.

Elevated view of reinforced house It is explanatory drawing of a construction process, (A) is a figure which shows the exposed state of a base and a girder part, (B) is a lineblock diagram of a net interior mortar seismic layer, (C) is a longitudinal side view of a reinforced wall Transverse plan view including openings Cross section of the corner

Explanation of symbols

DESCRIPTION OF SYMBOLS 5 Opening part 6 Sash 7 Column 8 Outer wall 9 Reinforcement wall 10 Reinforcement holding frame 11 Lamination joining seismic layer 12 Heat insulation layer 13 Outer wall cutting part 14 Sheet material 15, 17 Resin mortar layer 16 Fiber net 18 Peg 19 Heat insulation block 20 Fire prevention mortar

Claims (4)

A seismic layer with a net interior mortar in which a fiber net is embedded in a resin mortar is provided on the existing outer wall surface except for the opening of the building, with its upper and lower edges fixed to the building base and girders, respectively, An existing building reinforcement structure in which a seismic layer with a net interior mortar and a heat insulating layer that is tightly integrated with the surface of the seismic layer are coated with a fire mortar to form a seismic and heat insulation reinforcing wall. The building reinforcement structure according to claim 1, wherein the existing outer wall surface and the net interior mortar seismic layer are separated via a sheet material. The building reinforcing structure according to claim 1 or 2, wherein a reinforcing holding frame is fixed to the outer periphery of the existing frame of the opening of the building, and the net-interior mortar seismic layer and a heat insulating block in close contact with the net are installed. A part of the outer wall of the building is removed to expose the sides of the base and girders, and a reinforcing holding frame is fixed to the outer periphery of the opening of the building, and a separation sheet is temporarily attached to the existing outer wall surface excluding the opening of the building A step of applying a resin mortar to the base and the side surfaces of the girders and the sheet surface, interposing a fiber net and further applying a resin mortar to form a net interior mortar layer, and the net interior mortar A step of fixing the upper and lower edges of the layer to the base and the girder, a step of closely attaching a heat insulating layer to a resin mortar surface to solidify the net interior mortar, and forming an earthquake resistant layer; and the earthquake resistant layer and the heat insulating layer. A building strengthening method comprising a step of coating a layer with fire mortar.

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