JP3849968B2 - Waterproof structure at the lower end of the outer wall of a seismically isolated house - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a seismic isolation house supported via a seismic isolation element, and particularly relates to a waterproof structure of a gap portion on the lower side of a building body.
[0002]
[Prior art]
As a means for preventing the vibration of the ground during a large earthquake from being transmitted to a house, the building body is supported through a seismic isolation element.
[0003]
As this type of seismic isolation element, there are a sliding bearing that absorbs vibration from the ground by horizontal sliding, a rolling bearing that also absorbs by rolling, a rubber bearing that absorbs by laminated rubber, etc. One of the seismic isolation elements is installed on the foundation, the foundation beam of the building body is placed on the seismic isolation element, and a wall, a floor, etc. are further constructed thereon.
[0004]
Fig. 4 schematically shows a conventional seismic isolation house of this type, with the seismic isolation element (2) on the required place on the slab foundation (1) formed by placing concrete. It is installed. A base beam (3) on the first floor is placed on the seismic isolation element (2), and a wall (4) and a floor (5) are supported on the base beam (3).
[0005]
In a house that is seismically isolated in this way, the building body (8) is supported in a state of floating from the ground by the seismic isolation element (2), and when viewed from the outside, the building body (8) A large gap (13) is generated on the lower side. For this reason, conventionally, as shown in the figure, the lower end of the drainage cover (14) suspended from the outer wall side of the building body (8) is extended to the vicinity of the foundation concrete so as to close the gap (13) in this part. ing.
[0006]
[Problems to be solved by the invention]
As described above, conventionally, the clearance under the building body (8) is closed by the drainage cover (14). However, the drainage cover (14) is located on the building body (8) side and is In some cases, the slab foundation (1) side moves in the horizontal direction, so it is necessary to provide it away from the slab foundation side (1), and a small gap (15) is formed below it. .
[0007]
For this reason, the waterproof effect is insufficient, and there is a problem that rainwater enters from the small gap under the floor.
[0008]
In view of such conventional inconveniences, the present invention supports a building body in a state where it is floated via a seismic isolation element. Even if rainwater enters from the underside of a drainage cover suspended from the building body, The purpose of the present invention is to provide a waterproof structure that does not enter the interior and is less likely to be damaged even in the event of a large earthquake.
[0009]
[Means for Solving the Problems]
In order to solve the above-described problems, the present invention provides a drainage cover that is provided on a foundation and supports a building body via a seismic isolation element, with a drainage cover extending downward from the building body along the outer periphery of the building body. Further, a water stop material made of a rubber plate that is bent at the time of collision with the drain cover is provided inside the drain cover so as to protrude upward from the foundation side.
[0010]
In the above, it is conceivable that the waterstop material is attached to the foundation concrete or the concrete cast integrally with the foundation concrete.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 schematically shows a support structure for a base-isolated house according to the present invention. (21) is a concrete slab foundation, for example, excavating the ground shallowly to carry out split chestnut work. It is placed on top. A pedestal (20) is installed at a necessary place of the slab foundation (21), and a seismic isolation element (22) is arranged thereon. A base beam (23) made of, for example, an H-shaped steel is placed so as to straddle the seismic isolation element (22). The base beam (23) is used as a base and walls and floors (25) ) Is built.
[0012]
FIG. 2 shows details of the lower end of the outer wall (24) of the building body (19). (26) is a base beam (23) mounted on the seismic isolation element (22), and a base of the outer peripheral part joined to the tip of the base beam (23) via a joint plate (27) It is a beam and is arranged along the building outer wall (24). The base beam (26) on the outer periphery is also made of H-section steel with the same cross section as the base beam (23) on the seismic isolation element (22), but on top of this, a frame frame (28) is installed. An inner wall material (29) is attached to the inner side of the shaft frame (28), and an exterior material (30) is attached to the outer side to constitute the outer wall (24).
[0013]
(31) is a floor panel made of an ALC plate or other concrete plate, dropped into the middle part of the base beam (23) on the seismic isolation element (22) and attached to the base beam (26) ( 41) It is installed on top, and the floor board (33) is stretched on it.
[0014]
On the lower side of the base beam (26) of the outer peripheral part, the concrete foundation standing up integrally with the slab foundation (21) so as to rise above the outer peripheral end of the slab foundation (21) The part (34) stands up, thereby covering the gap (35) on the lower side of the base beam (26) which is the lower side of the building body (19).
[0015]
(36) is a drainage cover, the horizontal portion (37) of the upper end of the cover is attached between the upper surface of the base beam (26) and the frame frame (28), the horizontal portion (37 The vertical cover body (38) bent from the outer edge of the base beam (26) is hung outside the base beam (26) to cover the outside of the base beam (26) and to the bottom surface of the base beam (26). The gap (39) between the foundation rising part (34) is blocked.
[0016]
The bottom edge of the drainage cover (36) is bent inward at almost right angles, but the foundation rising part is not damaged by buffering with the foundation rising part (34) due to horizontal shaking during a large earthquake. It is located slightly above (34).
[0017]
And on the inner side of this drainage cover (36), at the inner corner of the foundation rising part (34), it protrudes above the upper surface of the rising part (34), for example, a water stop material made of a rubber plate ( 40) is fixedly attached to the rising portion (34), for example. As a result, even if rainwater enters from a small gap between the drain cover (36) and the foundation rising portion (34), the water stop material (40) prevents the water from entering down the floor.
[0018]
Further, in this embodiment, the water stop material (40) is provided at the inner corner of the foundation rising portion (34), and is separated from the drainage cover (36) by at least the width of the foundation rising portion (34). Therefore, even if it moves horizontally due to a certain scale of earthquake, there is no risk of colliding with the drain cover (36), and even if it collides due to a larger earthquake, it is formed by a rubber plate that is a flexible material Therefore, as shown in FIG. 3, the water-stopping material (40) bends to absorb the impact and is very unlikely to break. In addition, even if the drain cover (36) moves inward of the water stop material (40), the water stop material (40) bends in the opposite direction and returns to its original position at the time of return. There is no need to do it.
[0020]
Further, the mounting structure of the water stop material (40) is not particularly limited, and it may be directly fixed to the foundation rising portion (34) with a concrete nail or the base is raised in advance (34). It is also possible to embed in Of course, if it has the above-mentioned relationship with respect to the drain cover (36), it can be attached to other parts.
[0021]
In this embodiment, the water stop material (40) is attached to the foundation rising part (34), but it is also possible to attach it to other parts, and when there is no rising part as shown in FIG. Can protrude directly from the slab foundation (21).
[0022]
【The invention's effect】
As described above, according to the present invention, since the water stop material is provided inside the drain cover that covers the lower space of the building body, even if rainwater enters from the tip of the drain cover, it stops. It is possible to prevent water from entering the floor.
[0023]
Moreover, since the water-stopping material is made of a rubber plate , there is very little risk of damage even if it collides with the drain cover in the event of a large earthquake.
[Brief description of the drawings]
FIG. 1 is a schematic cross-sectional view of a base-isolated house showing an embodiment of the present invention.
FIG. 2 is a cross-sectional view showing a lower end portion of the outer wall in a vertical manner.
FIG. 3 is an enlarged view of a main part of FIG. 2;
FIG. 4 is a schematic cross-sectional view showing a conventional structure for supporting a base-isolated house.
[Explanation of symbols]
(19) Building body (21) Slab foundation (22) Seismic isolation element (34) Foundation riser (36) Drainage cover (40) Waterstop

Claims (2)

In a base-isolated house that supports the building body via a seismic isolation element on the foundation, a drainage cover is provided along the outer periphery of the building body downward from the building body, and the drainage cover is provided inside the drainage cover. A waterproof structure for a lower end portion of an outer wall of a base-isolated house, characterized in that a water-stopping material made of a rubber plate that is bent at the time of a collision with the base is provided so as to protrude upward from the foundation side. The waterproof structure of the lower end part of the outer wall of a base-isolated house according to claim 1 , wherein the water-stopping material is attached to the foundation concrete or the concrete cast integrally with the foundation concrete.

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