JP2011117127A - Method for constructing double wall - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for constructing a double wall, which enables the construction of the inexpensive double wall by facilitating work for constructing an interior wall, because a synthetic resin foamed plate can be easily installed as an outer form when the interior wall is constructed on an outer peripheral wall of a building. <P>SOLUTION: A plurality of columnar members 11 made of a synthetic resin foam are juxtaposed on an inner surface 1a of an exterior wall 1 in such a manner as to avoid an uneven portion 3; a plate-like member 12 made of a synthetic resin foam abuts on the columnar members 11, and serves as the outer form; an inner form 14 is arranged in the state of facing the plate-like member 12; and concrete is poured in a space portion 16 between the outer and inner forms 12 and 14, so that the interior wall 17 can be constructed. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a method for constructing a double wall, and more specifically, a double wall applied when an outer peripheral wall of a building (hereinafter sometimes referred to as an outer wall) is used and an inner wall is newly constructed inside the outer wall. This is an excellent method for constructing double underground walls.

  In the outer wall of a building, double wall is constructed by constructing the inner wall inside the outer wall from the viewpoint of rainwater leaking from the outer wall from the cracks, joints, separators, etc., and from the viewpoint of soundproofing and heat insulation, etc. And that is done.

  In particular, in underground buildings, there is a risk that groundwater contained in the surrounding strata will leak from cracks in the outer wall, joints, separators, and the like. Therefore, the inner wall is built inside the outer wall of the underground building to form a double wall, and the groundwater that permeates from the outer wall is formed at the bottom of the space part through the space part defined by the outer wall and the inner wall. It is discharged from the mouth to the outside.

  In the case of constructing such a double wall, in particular, a concrete inner wall, it is necessary to install an outer formwork for forming the inner wall between the outer wall and the inner wall. Therefore, in the construction of such a double wall, the outer formwork has to be removed after the concrete forming the inner wall is hardened, and the work is complicated.

  Therefore, as the outer mold of the inner wall, a synthetic resin foam plate with a water channel formed on the surface is used, and by embedding it as a discarded mold, the work of removing the outer mold is eliminated and the heat insulation is excellent. A method for constructing a wall surface has been proposed (for example, Patent Document 1).

Japanese Patent Laid-Open No. 11-43963 (see FIGS. 1 to 5)

  By the way, in recent years, when a building is renovated, for the purpose of reducing the construction cost, the outer wall of the existing building is left, and the inner wall or the like is constructed inside. In this case, part of the dismantling part (non-landing part) such as a floor and a partition wall remains as a protruding part on the inner surface of the outer wall of the existing building.

  If the technique of the above-mentioned patent document 1, that is, the technique of constructing the inner wall using the synthetic resin foam plate having a water channel formed on the surface as the outer mold frame, is adopted for the renovation work of such a structure, It becomes a non-land portion, and the synthetic resin foam as the outer mold cannot be installed in a plane parallel to the outer wall. Therefore, in this case, it is necessary to carefully crush using a crushing device such as an air hammer so that the unlanded portion of the remaining part of the dismantling such as the partition wall is flush with the other surface. Becomes complicated.

  The present invention has been made in view of the actual circumstances of the background art described above, and as an outer mold, a synthetic resin foam can be easily and parallelly installed on the inner surface of the outer wall. Therefore, an object of the present invention is to provide a method for constructing a double wall in which the construction work of the inner wall is simplified and an inexpensive double wall can be constructed.

In order to achieve the above-described object, the double-wall construction method according to claim 1 includes a columnar member made of a synthetic resin foam juxtaposed on the inner surface of an outer wall of a building, and the columnar member is made of a synthetic resin foam. A plate-shaped member is brought into contact, and an inner wall is constructed along the plate-shaped member.
According to the double wall construction method of claim 2, a columnar member made of a synthetic resin foam is arranged on the inner surface of the outer wall of the building, avoiding the uneven portion of the inner surface of the outer wall, and the columnar member A plate-like member made of a synthetic resin foam is brought into contact with the plate-like member as an outer mold frame, an inner mold frame is disposed opposite to the outer mold frame, and the outer mold frame and the inner mold frame It is characterized by constructing an inner wall by placing concrete in the space between.
Furthermore, in the method for constructing a double wall according to claim 3, a columnar member made of a synthetic resin foam is provided on the inner surface of the outer wall of the building, avoiding the uneven portion of the inner surface of the outer wall, and the columnar member A plate-like member made of a synthetic resin foam is brought into contact, the plate-like member is disposed as an outer mold frame, and a flat surface having no uneven portion of the inner surface of the outer wall has a plate-like portion and one surface thereof. The convex portion of the synthetic resin foam molded body having a plurality of convex portions and groove portions is brought into contact with the inner surface of the outer wall, the plate-shaped portion of the foam molded body is disposed as an outer mold frame, and the outer mold frame and An inner mold is disposed so as to face each other, and concrete is placed in a space portion between the outer mold and the inner mold to construct an inner wall.

  According to the first aspect of the present invention, columnar members made of synthetic resin foam are juxtaposed on the inner surface of the outer wall of the building, and plate-like members made of synthetic resin foam are brought into contact with the columnar members, Since the inner wall is constructed along the plate-like member, the inner wall can be easily constructed. Further, even if the synthetic resin foam is not molded or processed into a complicated shape, a convex portion and a groove defined by the columnar members arranged side by side and the plate-shaped member in contact with the columnar members. A water channel through which water leaks is formed in a space composed of parts, and an inner wall having a drainage channel can be easily constructed. Further, since the columnar member and the plate-like member are formed of the synthetic resin foam, since it is lightweight and has a heat insulating property, the installation work is facilitated and the double heat insulating property is excellent. A wall can be formed.

  According to the second aspect of the present invention, the columnar members are arranged in parallel avoiding the non-landing portion of the inner surface of the outer wall of the building, and the plate-like member is brought into contact with the columnar member as the outer mold frame. Regardless of this, the plate-like member can be arranged in parallel and in plane with the inner surface of the existing outer wall, the outer frame can be easily arranged, and the inner wall can be easily constructed. Further, even if the synthetic resin foam is not molded or processed into a complicated shape, a convex portion and a groove defined by the columnar members arranged side by side and the plate-shaped member in contact with the columnar members. A water channel through which water leaks is formed in a space consisting of portions, and an outer formwork having a drainage channel can be easily constructed. In addition, since the columnar member and the plate-like member constituting the outer mold are formed of the synthetic resin foam, they are lightweight and have heat insulation properties. A double wall having excellent properties can be formed.

  According to the invention of claim 3, on the inner surface of the outer wall where the non-land portion is present, the columnar member is arranged side by side avoiding the non-land portion, and the plate-shaped member is brought into contact with the columnar member to form the outer mold frame. Since the outer mold is formed using a foam molded body having a plate-like portion and a plurality of convex portions and groove portions on one side of the flat surface on which the uneven portion of the inner surface of the outer wall does not exist, The construction work of the outer formwork becomes easier. Further, even when there is no space for disposing an outer mold frame in which the columnar member and the plate-like member are in contact with each other, a foamed molded body having a plate-like portion and a plurality of convex portions and groove portions on one side thereof is used. By forming the outer mold frame, the space necessary for the construction can be narrowed, and the space can be saved. In addition, the space formed by the columnar members arranged side by side and the plate-shaped member in contact with the columnar members, which is composed of a convex portion and a groove portion, the plate-shaped portion of the foam molded body, and a plurality of A water channel through which water leaks is formed in the space composed of the convex portion and the groove portion, and an outer mold frame having a drainage channel can be easily constructed. Furthermore, the columnar member, the plate-like member, and the plate-like member constituting the outer mold and the foam-molded body having a plurality of convex portions and groove portions on one side thereof are formed of a synthetic resin foam, and thus are lightweight. And since it has heat insulation, the installation work becomes very easy and the double wall excellent in heat insulation can be formed.

It is the perspective view which showed notionally the state which demolished the structure leaving the outer wall of the existing building. It is the perspective view which showed the operation | movement procedure of the construction method of the double wall concerning this invention, and showed the state which attached the columnar member to the inner surface of an outer wall. It is an expanded sectional view of the part which follows the AA line in FIG. It is the perspective view which showed the operation | movement procedure of the construction method of the double wall based on this invention, and showed notably the state which contacted the plate-shaped member to the columnar member. It is an expanded sectional view of the part which follows the BB line in FIG. It is the perspective view which showed the operation | movement procedure of the construction method of the double wall concerning this invention, and showed the state which attached the inner mold to the separator. It is an expanded sectional view of the part which follows the CC line in FIG. It is the perspective view which showed the operation | movement procedure of the construction method of the double wall concerning this invention, and showed the state by which the inner wall was constructed | assembled. It is an expanded sectional view of the part which follows the DD line in FIG. It is the perspective view which showed one Embodiment of the foaming molding which has a plate-shaped part used with the construction method of the double wall concerning this invention, and the some convex part and the groove part on the single side | surface. It is the perspective view which showed other embodiment of the foaming molding which has a plate-shaped part used with the construction method of the double wall concerning this invention, and the some convex part and the groove part on the single side | surface.

  Hereinafter, in the double wall construction method according to the present invention, an embodiment of an underground double wall which is an aspect of the construction method will be described in detail based on the drawings.

  As shown in FIG. 1, in the existing concrete outer wall (outer peripheral wall) 1, the non-land portions 2 and 3 after dismantling the floors, partition walls and the like of the concrete building remain. Among these non-land portions, at least the non-land portion corresponding to the portion that constructs the inner wall (in the illustrated embodiment, the non-land portion 3 after dismantling the partition wall), the thickness of the columnar member to be described later In the case where there is a higher portion, it is removed using a peeling device such as an air hammer so as to be lower than the thickness of the columnar member. And the separator 10 is planted in an appropriate position.

  Next, as shown in FIG. 2 and FIG. 3, the columnar member 11 made of a synthetic resin foam is directed vertically on the inner surface 1a of the outer wall 1 so as to avoid the uneven portion 3 on the inner surface 1a of the outer wall 1 They are arranged side by side by a known method such as an adhesive. For example, a one-component modified silicone adhesive (manufactured by Konishi Co., Ltd., Bond KMP10) can be applied and adhered to the columnar member 11 with a thickness of about 2 mm. The installation direction of the columnar member is not particularly limited, but if the vertical direction is installed in the longitudinal direction of the columnar member, the space defined by the columnar member and the plate-like member is used as a drainage channel for water leakage from the outer wall. It is preferable because it is possible.

  Next, as shown in FIGS. 4 and 5, the plate-like member 12, which is also made of a synthetic resin foam, is brought into contact with the columnar member 11 with an adhesive, a pin or the like (in the illustrated embodiment, the pin 13). Let In this case, it is preferable that the end portions of the adjacent plate-like members 12 and 12 are positioned on the columnar member 11, and a fitting portion is provided at the end portion of the plate-like members 12 and 12, so that a gap between the joints is provided. It is preferable not to open.

  Examples of the synthetic resin foam constituting the columnar member 11 and the plate-like member 12 include polystyrene resin foam, polyethylene resin foam, polyurethane resin foam, polypropylene resin foam, and the like. The thing excellent in aqueous property, durability, and heat insulation is preferable. In particular, extruded polystyrene foam is preferred because of its high waterproofness and moisture resistance and high strength.

  The cross-sectional shape of the columnar member 11 is preferably a square, a rectangle, or a trapezoid in terms of strength, and the thickness dimension (dimension in the direction perpendicular to the inner surface of the outer wall) is designed in consideration of the uneven portion, and the width dimension ( The dimension in the direction parallel to the inner surface of the outer wall is designed so that the strength necessary to support the outer mold (plate member 12) is obtained. That is, if the thickness dimension of the columnar member 11 is small, the amount of chipping for making the height dimension of the uneven portion lower than the thickness dimension of the columnar portion increases, and the operation becomes complicated. On the other hand, if the thickness dimension is large, not only is it bulky and disadvantageous in installation work, management, etc., but also a large dead space is formed, and the space utilization rate decreases. Moreover, if the width dimension of the columnar member 11 is small, it will be disadvantageous in strength, and if it is large, it will be bulky and disadvantageous in installation work, management, and the like. Therefore, the dimensions of the columnar member 11 are 5 to 10 cm in thickness (dimension in the direction perpendicular to the inner surface of the outer wall when the longitudinal direction of the columnar member 11 is arranged in the vertical direction), and the width (columnar member). 11 is preferably 5 to 10 cm in the lateral dimension parallel to the inner surface of the outer wall when the longitudinal direction of 11 is arranged in the vertical direction. The length of the columnar member 11 (the dimension in the longitudinal direction of the columnar member 11) is preferably 10 to 200 cm from the viewpoint of installation workability and the like.

  Further, the thickness of the plate-like member 12 is designed so that sufficient strength as an outer mold forming the inner wall can be obtained. That is, the strength of the plate-like member 12 must be able to sufficiently withstand the pressing of the concrete slurry that forms the inner wall. However, if the thickness of the plate-like member 12 is thicker than necessary, it becomes bulky and disadvantageous in installation work, management, etc., and a large dead space is formed, and the space utilization rate decreases. For this reason, the thickness of the plate member 12 (the dimension in the direction perpendicular to the inner surface of the outer wall when the plate member is abutted) is preferably 20 to 100 mm. Further, the length of the plate-like member 12 (the vertical dimension with respect to the inner surface of the outer wall when the plate-like member is abutted) and the width (the dimension of the lateral direction parallel to the inner surface of the outer wall when the plate-like member is abutted) ) From the viewpoint of installation workability and the like, the length is preferably 30 to 200 cm and the width is preferably 30 to 200 cm.

  Next, as shown in FIGS. 6 and 7, a P-con 10 a is attached to the separator 10, and the inner mold 14 such as a plywood is opposed to the plate-like member 12 with an appropriate interval (an interval corresponding to the thickness of the inner wall). The lateral end thick 15 is disposed on the inner mold 14, and the lateral end thick 15 is attached by a foam tie nut 10 b attached to the separator 10. If necessary, reinforcing bars are disposed in advance in the space 16 between the plate-like member 12 and the inner mold 14.

  Next, concrete slurry is placed in the space 16 between the plate-like member 12 and the inner mold 14. Then, when the concrete slurry is cured, the inner mold 14 is removed, and the inner wall 17 is constructed as shown in FIGS.

  In the underground double wall formed by such a construction method, the groundwater infiltrated from the outer wall 1 is discharged downward from the vertically extending groove 18 defined by the plate-like member 12 and the columnar member 11, and the bottom portion. It is discharged to the outside from a drain outlet (not shown) formed in

  Moreover, in the construction method of the underground double wall of this embodiment, the columnar member 11 and the plate-like member 12 are formed separately. Therefore, the columnar member 11 can be attached regardless of the position of the non-land portion 3, and the plate-like member 12 as the outer mold can be easily installed in parallel with the outer wall surface in a plane. Further, the columnar member 11 and the plate-like member 12 are made of different materials, for example, the columnar member 11 is made of a water-permeable synthetic resin foam, and the plate-like member 12 is made of a water-impermeable synthetic resin foam. In this case, even when groundwater permeates from the outer wall 1 in the portion where the columnar member 11 is installed, the water leakage is discharged to the outside from a drain port (not shown) formed in the bottom. be able to. Further, by making the columnar member 11 and the plate-like member 12 foams having different apparent densities, the strength and the like can be adjusted.

  In the outer mold frame of the above embodiment, the columnar member 11 is formed with a thick vertical end and the plate member 12 is formed separately with the outer mold frame. However, as shown in FIG. And the plate-like portion 19b are bonded together, or the convex portion is formed by cutting or the like, and is integrally formed in advance, and a plurality of pieces are formed on the plate-like portion and one surface thereof. By using the synthetic resin foam molded body 19 having a convex part and a groove part, it is possible to save space, and when the columnar member and the plate-like member are not provided with separate spaces as outer mold frames, respectively. Can also build the outer formwork.

  Furthermore, as another aspect of the foam molded article, as shown in FIG. 11, a synthetic resin foam molded article 20 in which convex portions 20a and grooves are formed in a lattice shape can be used. When the synthetic resin foam molded body in which the grooves as shown in FIG. 11 are formed in a lattice shape, when the vertical grooves are blocked by a separator or the like, the horizontal grooves in the lattice can be used as drainage channels. It becomes.

  Further, in the above embodiment, the outer frame formed of the columnar member 11 and the plate member 12 is formed on the entire inner surface 1 a of the outer wall 1. However, it is also possible to form an outer mold frame by combining the plate-shaped part and an outer mold frame made of the foam molded body 19 or 20 having a plurality of convex parts and groove parts on one surface thereof. In this case, on the wall surface where the uneven portion exists, the columnar member 11 is arranged in parallel avoiding the uneven portion, and the plate member 12 is brought into contact with the columnar member 11 to form the outer mold frame. On the other hand, on a flat wall surface where there is no uneven portion, an outer mold frame may be formed using a foamed molded body 19 or 20 having a plate-like portion and a plurality of convex portions and groove portions on one side thereof. In some cases, the outer mold can be easily constructed even in a narrow space.

  In addition, the shape dimension of the synthetic resin foam molded body 19 in which the convex portion 19a and the plate-like portion 19b are integrated in advance and having a plate-like portion and a plurality of convex portions and groove portions on one surface thereof is as described in the above embodiment. What is necessary is just to design from the viewpoint similar to what showed the columnar member 11 and the plate-shaped member 12 which were shown separately, and the thickness (depth) dimension of the convex part 19a is 1-5 cm, and a width dimension is 1-10 cm. Moreover, the width dimension of the groove part which is the installation space | interval between the convex parts 19a and 19a has preferable 2-10cm. The thickness of the plate-like portion 19b is preferably 10 to 50 mm, the length of the plate-like portion 19b is preferably 30 to 200 cm, and the width is preferably 30 to 200 cm. The same applies to the synthetic resin foam molded body 20.

1 outer wall (outer wall)
DESCRIPTION OF SYMBOLS 1a Inner surface 2,3 Unlanding part 10 Separator 10a P-con 10b Foam tie nut 11 Columnar member 12 Plate-shaped member 13 Pin 14 Inner form frame 15 Thick side edge 16 Space part 17 Inner wall 18 Groove 19 Foam molding 19a Convex part 19b Plate -Shaped part 20 Foam molded body 20a Convex part 20b Plate-shaped part

Claims (3)

  A columnar member made of a synthetic resin foam is juxtaposed on the inner surface of the outer wall of the building, a plate member made of a synthetic resin foam is brought into contact with the columnar member, and an inner wall is constructed along the plate-like member. A construction method of a double wall characterized by the above.   A columnar member made of a synthetic resin foam is disposed in parallel on the inner surface of the outer wall of the building, avoiding the uneven portion of the inner surface of the outer wall, and a plate-like member made of a synthetic resin foam is brought into contact with the columnar member, Using the plate-like member as an outer mold frame, an inner mold frame is disposed so as to face the outer mold frame, concrete is placed in a space portion between the outer mold frame and the inner mold frame, and an inner wall is formed. A construction method of a double wall characterized by constructing.   A columnar member made of a synthetic resin foam is disposed in parallel on the inner surface of the outer wall of the building, avoiding the uneven portion of the inner surface of the outer wall, and a plate-like member made of a synthetic resin foam is brought into contact with the columnar member, Synthetic resin foam molding in which the plate-like member is disposed as an outer mold frame, and has a plate-like portion and a plurality of convex portions and groove portions on one side thereof on a flat surface where the uneven portion of the inner surface of the outer wall does not exist. The convex part of the body is brought into contact with the inner surface of the outer wall, the plate-like part of the foamed molded body is arranged as an outer mold frame, the inner mold frame is arranged facing the outer mold frame, and the outer mold A method for constructing a double wall, characterized in that concrete is placed in a space between a frame and an inner mold to construct an inner wall.

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