JP2020016113A - Waterproof structure, waterproof layer construction method and waterproof layer piece - Google Patents

Abstract

To provide a waterproof structure that can connect a waterproof layer formed on each of two continuous surfaces via a corner of a concrete structure to ensure waterproof performance, a waterproof layer construction method, and a waterproof layer piece.SOLUTION: A waterproof structure 1 of a concrete structure 2B in which a first end panel (first surface) 251 and an upper surface (second surface) 23 that are continuous via a corner 27 are formed, comprises: a first waterproof layer 31 provided along the first end panel 251; a second waterproof layer 32 provided along the upper surface 23; and a waterproof layer piece 33 provided along the corner 27. The waterproof layer piece 33 has a first waterproof piece 331 provided along the first end panel 251 and a second waterproof piece 332 integrated with the first waterproof piece 331 and provided along the upper surface 23. The first waterproof piece 331 and the first waterproof layer 31 are connected, and the second waterproof piece 332 and the second waterproof layer 32 are connected.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a waterproof structure, a waterproof layer construction method, and a waterproof layer piece.

On the surface of the concrete structure, for example, a waterproof layer such as a paint film waterproof layer is formed (for example, see Patent Document 1).
Such a waterproof layer is applied after the concrete of the concrete structure is cast. However, when the waterproof layer is provided in a narrow place or the like, the waterproof layer may be applied before the concrete is cast.
When forming a waterproof layer prior to casting concrete, a nonwoven fabric is provided in a region where the waterproof layer is to be formed, and a waterproof material such as urethane resin is sprayed or applied to the nonwoven fabric to form a coating waterproof layer. . After the waterproof layer is formed, concrete of the concrete structure is cast.

For example, as shown in FIG. 4, when the wedge surface 102 a of the concrete structure 102 faces the wedge surface 105 a of another concrete structure 105 and the gap is narrow, the waterproof layer 103 a of the wedge surface 102 a of the concrete structure 102 is provided. May be constructed prior to placing concrete, and the waterproof layer 103b on the upper surface 102b of the concrete structure 102 may be constructed after placing concrete.
In such a case, the waterproof layer 103a on the wife surface 102a of the concrete structure 102 and the waterproof layer 103b on the upper surface 102b continuous with the wife surface 102a via the corner 127 are provided with a wrap portion 106 that overlaps with each other. It is constructed to ensure connection.

  First, the nonwoven fabric of the waterproof layer 103a on the wife surface 102a is extended to the upper side of the upper surface of the concrete structure, and a waterproof material is sprayed or applied to the nonwoven fabric to form the waterproof layer 103a. Subsequently, concrete of the concrete structure 102 is cast. Subsequently, the waterproof layer 103b on the upper surface 102b of the concrete structure 102 is formed so as to overlap a portion of the waterproof layer 103a on the wife surface 102a above the upper surface 102b of the concrete structure 102. The waterproof layer 103a of the wife surface 102a is connected.

JP 2003-172004 A

  However, if the portion where the waterproof layer on the upper surface and the waterproof layer on the wife surface overlap (wrap portion) protrudes from the upper surface of the concrete structure, a temporary member or a building material interferes with the wrap portion in a subsequent process, There is a risk of damage. This may affect the waterproof performance of the waterproof layer.

  Therefore, the present invention provides a waterproof structure and a method for installing a waterproof layer capable of ensuring waterproof performance by connecting a waterproof layer formed on each of two continuous surfaces via a corner of a concrete structure. And a waterproof layer piece.

  In order to achieve the above object, a waterproof structure according to the present invention is provided along a first surface in a waterproof structure of a concrete structure having a first surface and a second surface that are continuous via a corner. A first waterproof layer, a second waterproof layer provided along the second surface, and a waterproof layer piece provided along the corner, wherein the waterproof layer piece is provided on the first surface. A first waterproofing piece provided along the first waterproofing piece, and a second waterproofing piece integrated with the first waterproofing piece and provided along the second surface, wherein the first waterproofing piece and the first waterproofing layer are The second waterproofing piece is connected to the second waterproofing layer, and the second waterproofing piece is connected to the second waterproofing layer.

  The method for constructing a waterproof layer according to the present invention is a method for constructing a waterproof layer, wherein the waterproof layer is provided on a concrete structure having a first surface and a second surface that are continuous through a corner. Prior to placing concrete, a waterproof layer piece installation step of providing a waterproof layer piece shaped along the corner in the area where the corner is formed, and prior to placing concrete in the concrete structure A first waterproof layer forming step of forming a first waterproof layer along the first surface in a region where the first surface is formed; and a concrete placing step of placing concrete of the concrete structure. A second waterproof layer forming step of forming a second waterproof layer along the second surface, wherein the waterproof layer piece includes a first waterproof piece provided along the first surface, 1 Integrate with the waterproofing piece and on the second surface The first waterproof layer forming step comprises connecting the first waterproof layer to the first waterproof piece, and the second waterproof layer forming step comprises: A waterproof layer is connected to the second waterproof piece.

  The waterproof layer piece according to the present invention is a waterproof layer piece provided along the corner of a concrete structure having a first surface and a second surface that are continuous via the corner, wherein A first waterproof piece provided along a surface; and a second waterproof piece integrated with the first waterproof piece and provided along the second surface, wherein the first waterproof piece is provided on the first surface. A first waterproof layer provided along the second waterproof piece is configured to be continuously provided, and the second waterproof piece is configured such that a second waterproof layer provided along the second surface is continuously provided. I do.

In the present invention, the waterproof layer piece is provided along the corner of the concrete structure, the first waterproof piece of the waterproof layer piece is connected to the first waterproof layer on the first surface, and the second waterproof piece is connected to the second waterproof piece on the second surface. 2 Connected to the waterproof layer. Thereby, the first waterproof layer and the second waterproof layer can be connected via the waterproof layer piece.
In the case where the first waterproof layer is constructed prior to the casting of the concrete of the concrete structure and the second waterproof layer is constructed after the concrete is cast of the concrete structure, the concrete is cast in the concrete structure. A waterproof layer piece is installed in advance, the waterproof layer piece is connected to the first waterproof layer, and after the concrete of the concrete structure is cast, the waterproof layer piece is connected to the second waterproof layer, The first waterproof layer and the second waterproof layer can be connected via the waterproof layer piece.
In addition, since the waterproof layer piece does not protrude from the surface of the concrete structure in a shape along the corner of the concrete structure, it prevents a temporary member or a building material from interfering with the waterproof layer piece in a subsequent process. Therefore, the waterproof performance of the waterproof layer can be ensured.

In the waterproof structure according to the present invention, the first waterproof layer includes a nonwoven fabric provided along the first surface, and a waterproof material sprayed or applied to the nonwoven fabric. May be sandwiched between the nonwoven fabric and the waterproof material.
With such a configuration, the first waterproof layer and the first waterproof piece can be reliably connected.

  ADVANTAGE OF THE INVENTION According to this invention, the waterproof layer formed in each of two continuous surfaces can be connected via the corner part of a concrete structure, and waterproof performance can be ensured.

It is a figure showing an example of a waterproof structure by an embodiment of the present invention. It is a figure which shows the waterproofing layer piece installation process and the 1st waterproofing layer formation process of the construction method of the waterproofing layer by embodiment of this invention. It is a figure which shows the concrete casting process of the waterproofing layer construction method by embodiment of this invention. It is a figure showing an example of the conventional waterproof structure.

Hereinafter, a waterproof structure, a waterproof layer construction method, and a waterproof layer piece according to an embodiment of the present invention will be described with reference to FIGS. 1 to 3.
As shown in FIG. 1, a waterproof structure 1 according to the present embodiment is provided on a surface of a concrete structure 2.
A plurality of concrete structures 2 are provided in a row by, for example, a box culvert or the like so that their respective wife faces 25 and 25 face each other. In this embodiment, the adjacent concrete structures 2 and 2 are joined by a flexible joint 21, and joints 22 are provided between opposing wife faces 25.
The plurality of concrete structures 2, 2 are sequentially constructed from one side of the array to the other side during construction. The waterproof structure of the present embodiment is a waterproof structure of a concrete structure 2 (hereinafter, referred to as a concrete structure 2B) constructed after a concrete structure 2 (hereinafter, referred to as a concrete structure 2A) constructed in advance. It has become.

  The concrete structure 2B is formed such that its outer shape is substantially a rectangular parallelepiped. The surface of the concrete structure 2B has a substantially horizontal upper surface (second surface) 23, a lower surface 24, a substantially vertical surface, two wife surfaces 25 and 25 facing the adjacent concrete structure 2, and a substantially vertical surface. And two side surfaces 26, 26 facing in a direction orthogonal to the direction in which the wife surfaces 25, 25 face. The lower surface 24 is the inner surface of the box culvert, and the lower side is the internal space of the box culvert.

Of the two wife surfaces 25, 25, the wife surface 25 facing the wife surface 25 of the concrete structure 2A constructed in advance is defined as a first wife surface (first surface) 251 and the wife surface 25 on the opposite side. Is a second wife surface (not shown).
The first wife surface 251 is opposed to the wife surface 25 of the concrete structure 2A constructed in advance via the joint 22.
The upper edge 251a of the first wife surface 251 and the edge 23a of the upper surface 23 on the first wife surface 251 side are continuous via the corner 27.

The waterproof layer 3 is formed on the entire surface other than the lower surface 24 of the concrete structure 2B. The waterproof layer 3 of the concrete structure 2B is a coating waterproof layer in which a waterproof material such as urethane resin is sprayed or applied.
In the waterproof layer 3, a portion provided along the first wife surface 251 is referred to as a first waterproof layer 31, and a portion provided along the upper surface 23 is referred to as a second waterproof layer 32. Further, a waterproof layer piece 33 which is a part of the waterproof layer 3 is provided at a corner 27 between the first wife surface 251 and the upper surface 23.

The waterproof layer piece 33 is a member formed of a waterproof material, and is provided over the entire corner 27 between the first wife surface 251 and the upper surface 23. The waterproof layer piece 33 is provided along the first waterproof piece 331 provided near the upper edge 251a of the first wife surface 251 and along the vicinity of the edge 23a of the upper surface 23 on the first wife surface 251 side. A second waterproofing piece 332. The first waterproof piece 331 and the second waterproof piece 332 are integrally formed and have an L-shaped outer shape.
The waterproof layer piece 33 is formed by spraying a waterproof material on the mold.

The first waterproof layer 31 has a nonwoven fabric 311 provided along the first wife surface 251 and a waterproof material 312 such as urethane resin applied or sprayed on the entire surface of the nonwoven fabric 311. The upper edge portion 31a of the first waterproof layer 31 does not reach the upper edge portion 251a of the first wife surface 251 and is disposed below the upper edge portion 251a of the first wife surface 251.
The upper edge portion 31a of the first waterproof layer 31 is connected to the lower edge portion 331a of the first waterproof piece 331 of the waterproof layer piece 33.

  In the present embodiment, the lower edge portion 331a of the first waterproof piece 331 of the waterproof layer piece 33 is sandwiched between the upper edge portion 311a of the nonwoven fabric 311 of the first waterproof layer 31 and the upper edge portion 312a of the waterproof material 312. I have. The lower edge portion 331a of the first waterproof piece 331 is formed thinner than the upper portion 331b. When the lower edge portion 331a is sandwiched between the nonwoven fabric 311 and the waterproof material 312, the surface 331c of the upper portion 331b on the first wedge surface 251 side becomes a surface of the waterproof material 312 on the first wedge surface 251 side. The nonwoven fabric 311 is configured such that the surface 331d on the joint 22 side of the upper portion 331b is flush with the surface 311b of the nonwoven fabric 311 on the joint 22 side.

The second waterproof layer 32 is formed of a waterproof material such as urethane resin applied or sprayed on the upper surface 23 of the concrete structure 2B. The second waterproof layer 32 is provided on the entire upper surface 23 of the concrete structure 2B.
The vicinity of the edge 32 a of the second waterproof layer 32 on the first wife surface 251 side is connected to the second waterproof piece 332 of the waterproof layer piece 33 so as to overlap vertically.
The first waterproof layer 31 and the second waterproof layer 32 are connected via a waterproof layer piece 33.

The first wife face 251 faces the wife face 25 of the concrete structure 2A previously constructed via the joint 22 on the side of the concrete structure 2B. For this reason, after the concrete of the concrete structure 2B is cast, it is difficult to secure the construction space for the first waterproof layer 31. For this reason, the first waterproof layer 31 is configured to be constructed before the concrete of the concrete structure 2B is cast.
Of the waterproof layers 3 of the concrete structure 2B, the portions other than the first waterproof layer 31 are configured to be constructed after the concrete of the concrete structure 2B is cast.

Next, a method for applying the waterproof layer of the concrete structure according to the present embodiment will be described.
First, as shown in FIG. 1, the waterproof layer piece 33 is installed prior to the concrete casting of the concrete structure 2B (waterproof layer piece installation step).
The formwork 4 is extended from the top of the previously constructed concrete structure 2A to the concrete structure 2B to be constructed later, and the waterproof layer piece 33 is fixed to the formwork 4. The waterproof layer piece 33 is arranged at a position corresponding to the corner 27 of the concrete structure 2B.

Subsequently, the first waterproof layer 31 is formed (first waterproof layer forming step).
A nonwoven fabric 311 is provided along the joint 22, and a waterproof material 312 is sprayed on the nonwoven fabric 311. The first waterproof layer 31 is formed at a position corresponding to the first wife surface 251 of the concrete structure 2B.
At this time, the lower edge portion 331a of the first waterproof piece 331 is sandwiched between the upper edge portion 311a of the nonwoven fabric 311 and the upper edge portion 312a of the waterproof material 312, and the first waterproof layer 31 and the waterproof layer piece 33 are separated by a gap. Connect without.

Subsequently, as shown in FIG. 3, concrete of the concrete structure 2B is cast (concrete casting step).
A formwork (not shown) of the concrete structure 2B is installed, and concrete is poured. The first waterproof layer 31 is arranged along the first wife surface 251 of the concrete structure 2B, and the waterproof layer piece 33 extends along the corner 27 between the first wife surface 251 and the upper surface 23 of the concrete structure 2B. The concrete structure 2B is constructed so as to be arranged.

Subsequently, the second waterproof layer 32 is formed (second waterproof layer forming step).
When the concrete structure 2B is constructed, the mold 4 is removed, and as shown in FIG. 1, a waterproof material is sprayed or applied to the entire upper surface 23 of the concrete structure 2B to form the second waterproof layer 32. The second waterproof layer 32 and the second waterproof piece of the waterproof layer piece 33 are vertically overlapped with the second waterproof piece 332 of the waterproof layer piece 33 near the edge 32a of the second waterproof layer 32 on the first wife surface 251 side. 332 with no gap.
Before or after or simultaneously with the formation of the second waterproof layer 32, the waterproof layer 3 is formed on the side surface 26 and the second end surface (not shown) of the concrete structure 2B.
Thus, the waterproof layer 3 of the concrete structure 2B is formed.

Next, the waterproof structure, the method of applying the waterproof layer, and the operation and effect of the waterproof layer piece according to the present embodiment will be described with reference to the drawings.
In the above-described construction of the waterproof structure 1 and the waterproof layer 3 and the waterproof layer piece 33 according to the present embodiment, the waterproof layer piece 33 is provided along the corner 27 of the concrete structure 2B, and the first waterproof piece of the waterproof layer piece 33 is provided. 331 is connected to the first waterproof layer 31 of the first wife surface 251, and the second waterproof piece 332 is connected to the second waterproof layer 32 of the upper surface 23. Thereby, the first waterproof layer 31 and the second waterproof layer 32 can be connected via the waterproof layer piece 33.

  When the first waterproof layer 31 is constructed prior to the concrete casting of the concrete structure 2B and the second waterproof layer 32 is constructed after the concrete casting of the concrete structure 2B, the concrete structure 2B The waterproof layer piece 33 is installed prior to the concrete casting, and the waterproof layer piece 33 and the first waterproof layer 31 are connected. After the concrete of the concrete structure 2B is cast, the waterproof layer piece 33 and By connecting to the second waterproof layer 32, the first waterproof layer 31 and the second waterproof layer 32 can be connected via the waterproof layer piece 33.

In addition, since the waterproof layer piece 33 does not protrude from the surface of the concrete structure 2B in a shape along the corner 27 of the concrete structure 2B, in a subsequent process, the temporary members and the building materials are in contact with the waterproof layer piece 33. Since the interference can be suppressed, the waterproof performance of the waterproof layer 3 can be ensured.
In the present embodiment, the lower edge portion 331a of the first waterproof piece 331 is sandwiched between the upper edge portion 311a of the nonwoven fabric 311 and the upper edge portion 312a of the waterproof material 312, and the first waterproof layer 31 and the first waterproof The piece 331 is connected without a gap. Thereby, the first waterproof layer 31 and the waterproof layer piece 33 can be reliably connected.

As described above, the embodiments of the waterproof structure 1, the waterproof layer 3, and the waterproof layer piece 33 according to the present invention have been described. However, the present invention is not limited to the above-described embodiments, and does not depart from the gist of the present invention. It can be changed as appropriate.
For example, in the above embodiment, the lower edge portion 331a of the first waterproof piece 331 of the waterproof layer piece 33 is sandwiched between the upper edge portion 311a of the nonwoven fabric 311 and the upper edge portion 312a of the waterproof material 312, and the first waterproof Although the layer 31 and the first waterproof piece 331 are connected without any gap, the connection between the first waterproof layer 31 and the first waterproof piece 331 may be appropriately set.
In the above embodiment, the vicinity of the edge 32a of the second waterproof layer 32 on the first wife surface 251 side is vertically overlapped with the second waterproof piece 332 of the waterproof layer piece 33, and the second waterproof layer 32 and the second waterproof layer 32 Although the two waterproof pieces 332 are connected without any gap, the connection between the second waterproof layer 32 and the second waterproof piece 332 may be appropriately set.

Further, in the above embodiment, the first waterproof layer 31 is formed on the first wife surface 251 of the concrete structure 2B, and the second waterproof layer 32 is formed on the upper surface 23. The waterproof layer piece 33 is provided at the corner 27 between the surfaces. The surface (first surface) on which the first waterproof layer 31 is formed prior to the concrete casting of the concrete structure 2B, and the concrete striking. The surface on which the second waterproof layer 32 is formed (the second surface) after installation may be appropriately set as long as it is continuous via the corner 27. Further, the form of the concrete structure 2B may be appropriately set.
In the above-described embodiment, the first waterproof layer 31 and the second waterproof layer 32 are the waterproof layers coated or sprayed with the waterproof material, but may be the waterproof layers 3 other than the waterproof layer. .

DESCRIPTION OF SYMBOLS 1 Waterproof structure 2, 2A, 2B concrete structure 3 Waterproof layer 23 Upper surface (2nd surface)
27 corner portion 31 first waterproof layer 32 second waterproof layer 33 waterproof layer piece 251 first wife side (first side)
331 first waterproof piece 332 second waterproof piece

Claims (4)

In a waterproof structure of a concrete structure having a first surface and a second surface that are continuous through a corner,
A first waterproof layer provided along the first surface;
A second waterproof layer provided along the second surface;
And a waterproof layer piece provided along the corner,
The waterproof layer piece has a first waterproof piece provided along the first surface, and a second waterproof piece integrated with the first waterproof piece and provided along the second surface,
The first waterproof piece and the first waterproof layer are connected,
The waterproof structure, wherein the second waterproof piece and the second waterproof layer are connected. The first waterproof layer has a nonwoven fabric provided along the first surface, and a waterproof material sprayed or applied to the nonwoven fabric,
The waterproof structure according to claim 1, wherein the first waterproof piece is sandwiched between the nonwoven fabric and the waterproof material. In a method for constructing a waterproof layer, a waterproof layer is provided on a concrete structure having a first surface and a second surface that are continuous through a corner.
Prior to placing concrete in the concrete structure, a waterproof layer piece installation step of providing a waterproof layer piece shaped along the corner in the area where the corner is formed,
A first waterproof layer forming step of forming a first waterproof layer along the first surface in a region where the first surface is formed, prior to placing concrete in the concrete structure;
A concrete casting step of casting concrete of the concrete structure,
A second waterproof layer forming step of forming a second waterproof layer along the second surface,
The waterproof layer piece has a first waterproof piece provided along the first surface, and a second waterproof piece integrated with the first waterproof piece and provided along the second surface,
In the first waterproof layer forming step, the first waterproof layer is connected to the first waterproof piece,
The method for forming a waterproof layer, wherein the second waterproof layer is formed by connecting the second waterproof layer to the second waterproof piece. A waterproof layer piece provided along the corner of a concrete structure having a first surface and a second surface continuous through the corner,
A first waterproof piece provided along the first surface;
A second waterproofing piece integrated with the first waterproofing piece and provided along the second surface,
The first waterproof piece is configured to be connectable to a first waterproof layer provided along the first surface,
The waterproof layer piece, wherein the second waterproof piece is configured to be connectable to a second waterproof layer provided along the second surface.

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