JPH08319675A - Waterproof structure of building foundation and waterproof method - Google Patents

Abstract

PURPOSE: To provide waterproof structure of a foundation, which is capable of waterproofing perfectly and durably. CONSTITUTION: This invention relates to waterproof structure of a building foundation between a foundation 1 of a building and a sill 2 of the building to be loaded on this foundation 1. An elastic waterproofing material is installed between the top 11 of the building 1 and the bottom 21 of the sill 2. Furthermore, a waterproof sheet 5 is installed between an inside surface 41 of an exterior wall surface material 4 and an outdoor side surface 21 of the sill 2 erectingly from the top of the waterproof material 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waterproof structure for a building foundation and a waterproof method.

[0002]

2. Description of the Related Art Conventionally, the waterproof structure of the building foundation between the foundation of the building and the foundation of the building placed on the foundation is
As shown in FIG. 2, the inner surface 101 of the outer wall 100 and the base 2
The waterproof sheet 300 is sandwiched between the outdoor side surface 201 of 00 and the outdoor side surface 201, and the lower side of the waterproof sheet 300 is provided so as to hang down on the outdoor side surface 401 of the foundation 400. The waterproof sheet 300 is provided on the back surface of the waterproof sheet 300. Adhesive layer base 400
It had a structure in which it was attached to the outdoor side surface 401 of the above and was waterproofed.

[0003]

However, in the above-described conventional waterproof structure of the base portion, since the base 400 is made of concrete and has a poor affinity for the adhesive, and the surface is rough, the waterproof sheet 300 has a rough surface. There is a problem that the adhesive layer is easily peeled off and durability is poor, and in the construction in rainy weather, since the surface of the foundation 400 is wet, the waterproof sheet 300 cannot be adhered.

The present invention has been made in view of the above problems, and an object of the present invention is to solve these problems, and to provide a reliable and durable waterproof base. It provides a waterproof structure for the part.

[0005]

In the waterproof structure for a building foundation of the present invention as set forth in claim 1, a building foundation between a foundation of the building and a foundation of the building placed on the foundation. A waterproof structure having elasticity between the upper surface of the foundation and the lower surface of the base, and further, from the upper surface of the waterproof material, the inner side surface of the outer wall surface material and the outdoor side surface of the base. It is characterized in that a waterproof sheet is set up between them.

In the method for waterproofing a building foundation according to the present invention as defined in claim 2, a waterproof sheet is provided so as to hang downward between the inner side surface of the outer wall material of the building and the outdoor side surface of the base. , The bottom of this waterproof sheet is folded back along the lower surface of the base, on the other hand, an elastic sheet-like waterproof material is laid on the upper surface of the foundation, and the base provided with the waterproof sheet is placed on the upper surface of the foundation. Then, the waterproof sheet and the waterproof material are waterproofed by being pressed by the base.

[0007]

In the waterproof structure for a building foundation of the present invention as set forth in claim 1, an elastic waterproof material is laid between the upper surface of the foundation and the lower surface of the base, and further, from the upper surface of the waterproof material,
Since a waterproof sheet is set up between the inner side surface of the outer wall material and the outdoor side surface of the base, rainwater that blows inward from the lower edge of the outer wall is prevented from entering, ensuring reliable and durable waterproofing. You can

In the method for waterproofing a building foundation of the present invention as defined in claim 2, a waterproof sheet is provided so as to hang downward between the inner side surface of the outer wall material of the building and the outdoor side surface of the base. , The bottom of this waterproof sheet is folded back along the lower surface of the base, on the other hand, an elastic sheet-like waterproof material is laid on the upper surface of the foundation, and the base provided with the waterproof sheet is placed on the upper surface of the foundation. However, since the waterproof sheet and the waterproof material are waterproofed by being pressed by the base, the construction can be performed without trouble even in rainy weather.

Further, the unevenness of the base itself, the step and the gap of the connection portion generated on the lower surface of the base, and the gap of the lower surface of the base caused by the protrusion of the metal for fixing the base and the outer wall material to the lower surface of the base are Although it is absorbed to some extent by the compression of the waterproof material, waterproofing is hindered when a gap is created, and therefore waterproofing can be ensured by folding the waterproof sheet up to the lower surface of the base.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing an example of a waterproof structure for a building foundation of the present invention. In FIG. 1, the present invention is a waterproof structure of a building foundation between a foundation 1 of a building and a foundation 2 of a building placed on the foundation 1, the upper surface of the foundation 1 and the foundation 2 being The waterproof material 3 having elasticity is laid between the lower surface 21 and the lower surface 21.

Further, a waterproof sheet 5 is provided upright between the inner side surface 41 of the outer wall surface material 4 and the outdoor side surface 21 of the base 2 from the upper surface of the waterproof material 3 closer to the outer wall surface material 4 side. ing.

As the material of the waterproof material 3 having elasticity, synthetic rubber type foam, polyurethane or vinyl chloride resin foam is preferably used. The width of the waterproof material 3 laid along the upper surface of the foundation is wide in terms of preventing it from falling or shifting due to being caught when the building unit or the like is installed, and the width W is preferably 50 mm to 90 mm. . Further, the thickness T is preferably 10 mm to 20 mm from the viewpoint of ensuring the water stopping performance by utilizing compressibility.

The waterproof material 3 is fixed to the upper surface 11 of the foundation 1 by inserting it into an anchor bolt protruding from the upper surface. It is not necessary to bond the waterproof material 3 with an adhesive agent or the like, but in order to prevent displacement, It is also possible to bond the parts with caulking material.

The material used for the waterproof sheet 5 may be a synthetic rubber-based material or a metal such as an aluminum plate. The rising height H of the waterproof sheet 5 is about 60 mm, and the folding dimension L of the base 2 to the lower surface 21 is 2 because the contact area with the waterproof material 3 is secured.
0 mm to 50 mm is preferable.

The waterproofing method for the building foundation is performed as follows. When the building is assembled at the construction site by using the building unit, the above waterproof sheet 5 is attached in advance at the building unit production factory, and the base 2
The portion that hangs further downward is folded along the lower surface 21 of the base 2 and is carried into the construction site.

On the other hand, construction of the waterproof material 3 is
A method of sequentially laying the rolled waterproof material 3 while unfolding the upper surface 11 of the foundation 1 is adopted. In the laying of the waterproof material 3, the connecting portions of the straight line portions and the corner portions of the foundation 1 are overlapped and connected using caulking material. or,
As described above, the anchor member (not shown) protruding above the base 1 can be fixed to the base 1 by piercing the anchor member (not shown) with the waterproof material 3.

When it is necessary to more firmly fix the waterproof member 3 to the upper surface 11 of the foundation 1, the caulking member may be fixed at appropriate intervals.

When the waterproof material 3 is laid on the upper surface 11 of the foundation 1 as described above, the above-mentioned building unit is installed on the predetermined foundation 1 and the base 2 is fastened by anchor bolts. The waterproof material 3 is pressed and compressed by the dead weight of the building unit and the fastening force of the anchor bolts, and the waterproofing process is completed.

[0019]

According to the waterproof structure for a building foundation of the present invention as set forth in claim 1, an elastic waterproof material is laid between the upper surface of the foundation and the lower surface of the base, and further, from the upper surface of the waterproof material. Since the waterproof sheet is installed upright between the inner side surface of the outer wall material and the outdoor side surface of the base, rainwater that blows inward from the lower end of the outer wall is prevented from entering and is reliable,
Can be durable and waterproof.

In the method for waterproofing a building foundation of the present invention as defined in claim 2, a waterproof sheet is provided so as to hang downward between the inner side surface of the outer wall material of the building and the outdoor side surface of the base. , The bottom of this waterproof sheet is folded back along the lower surface of the base, on the other hand, an elastic sheet-like waterproof material is laid on the upper surface of the foundation, and the base provided with the waterproof sheet is placed on the upper surface of the foundation. However, since the waterproof sheet and the waterproof material are waterproofed by being pressed by the base, the construction can be performed without trouble even in rainy weather.

Further, the unevenness of the base itself, the step and the gap of the connecting portion formed on the lower surface of the base, and the gap on the back surface of the base formed by the protrusion of the metal for fixing the base and the outer wall to the lower surface of the base are waterproof materials. It is absorbed to some extent by the compression of
Since waterproofness is hindered when a gap is created, waterproofing can be ensured by providing the waterproof sheet by folding back to the lower surface of the base.

In addition to the above, unlike the conventional method, there is no need to bond the waterproof sheet to the foundation at the site, and only the waterproof material is laid on the foundation. As a result, it became possible to construct highly efficient buildings. Further, since the secondary waterproof sheet is not exposed to the outside of the foundation, it is possible to make the external cosmetic material (base molding) smaller. Therefore, it is suitable as a waterproof structure for a building foundation and a waterproof construction method.

[Brief description of drawings]

FIG. 1 is a sectional view showing an example of a waterproof structure for a building foundation of the present invention.

FIG. 2 is a cross-sectional view showing a conventional waterproof structure for a building foundation.

[Explanation of symbols]

 1 Foundation 11 Upper surface 2 Base 21 Lower surface 3 Waterproof material 4 Outer wall material 41 Inner side surface 5 Waterproof sheet H Height L Folded dimension T Thickness W Width

Claims (2)

[Claims] 1. A waterproof structure for a building foundation between a building foundation and a foundation of a building placed on the foundation, comprising:
A waterproof material having elasticity is laid between the upper surface of the foundation and the lower surface of the base, and a waterproof sheet is erected from the upper surface of the waterproof material between the inner side surface of the outer wall material and the outdoor side surface of the base. The waterproof structure of the building foundation, which is characterized by being installed. 2. A waterproof sheet is provided between the inner side surface of the outer wall material of the building and the outdoor side surface of the base so as to hang downward, and the lower side of the waterproof sheet is folded back along the lower surface of the base. On the other hand, a sheet-like waterproof material having elasticity is laid on the upper surface of the foundation, the foundation provided with the waterproof sheet is placed on the upper surface of the foundation, and the waterproof sheet and the waterproof material are pressed by the foundation. Waterproofing method for building foundations, which is characterized by waterproofing.