JP4568109B2 - Building foundation structure - Google Patents

Description

  The present invention relates to a building foundation structure that is rigidly coupled to a lower portion of a seismic wall that is provided continuously over a plurality of levels on the ground.

  The above building foundation structure is provided so that it can resist the building's overturning moment in the event of an earthquake. Yes (see, for example, Patent Document 1).

JP 2001-207530 A

For this reason, there is a disadvantage that the construction cost becomes higher due to the increase in underground construction costs such as excavation work costs, mountain retaining work costs, and soil disposal costs associated with excavation for installing foundation beams and foundation slabs. .
This invention is made | formed in view of the said situation, Comprising: It aims at making construction cost low and shortening a construction period.

A first characteristic configuration of the present invention is a building foundation structure that is rigidly coupled to a lower portion of a seismic wall that is continuously provided over a plurality of levels on the ground, and the floor of the lowest level in the basement is a flat slab The flat slab, the outer wall surrounding the basement floor, and the floor near the ground are rigidly coupled, and the earthquake-resistant wall is rigidly coupled across the floor near the ground and the flat slab. It is in the point which is constituted.

[Action and effect]
Using a basement such as the basement floor, the building foundation structure with rigidity that can resist the building's overturning moment in the event of an earthquake surrounds the flat slab that forms the bottom floor of the basement floor and the basement floor Since the outer wall and the floor near the ground are rigidly connected, and the seismic wall is rigidly connected across the floor near the ground and the flat slab , the foundation beam and the foundation slab are attached to the lower part of the underground frame. Compared with the case where it is provided, the construction cost can be reduced and the construction period can be shortened by suppressing an increase in the underground construction cost such as the excavation cost, the mountain retaining cost and the remaining soil disposal cost due to the excavation.
In addition, if the underground floor is made one level, it may be possible to perform construction not affected by the groundwater level.

  The second characteristic configuration of the present invention is that the floor near the ground is formed of a flat slab.

[Action and effect]
Since the floor near the ground is composed of flat slabs, the space on the basement floor can be formed into a space with high utility value with few protruding beams.

Embodiments of the present invention will be described below with reference to the drawings.
[First Embodiment]
1 to 3 schematically show structural members of a building, and a plurality of high-strength seismic elements (this embodiment) are provided on one end of a building of a frame 1 constituting a plurality of ground layers (six levels in this embodiment). In this form, three layers of seismic walls 2 are arranged side by side and connected across each level, and the seismic walls 2 are connected to each other by connecting beams 3, and the building according to the present invention is formed below the seismic walls 2 The base structure A is rigidly connected.

  In the building foundation structure A, the lowermost floor of the basement floor 4 is formed by a base flat slab 5, and the basement flat slab 5 and the left and right basement outer walls surrounding the basement floor 4 from the juxtaposed direction of the seismic walls 2. 6 and the floor level 1FL, which is a floor near the ground, are rigidly joined together with the first floor 7 that is substantially the same as the ground level, and is configured in a box shape. Each seismic wall 2 is connected to the first floor 7 and the foundation. The flat slab 5 is rigidly connected integrally.

  That is, the building foundation structure A is a structure in which the first floor slab 8 and its beam 9 and the foundation flat slab 5 are upper and lower flanges, and the left and right underground outer walls 6 are webs. Each earthquake-resistant wall 2 is supported by two-point support of the beam 9 and the foundation flat slab 5 so that the shear force of the earthquake-resistant wall 2 can be transmitted to the first-floor slab 8 to the beam 9 of the first-floor slab 8. A shaft reinforcement is arranged in

  As shown by the arrows in FIG. 1, the shearing force F of each seismic wall 2 is configured to be transmitted to the underground outer wall 6 by the first-floor slab 8 and its beam 9, as shown in FIG. As shown, the bending moment distribution M of each seismic wall 2 at the time of the earthquake is a reverse shear type in the basement 4 portion.

[Second Embodiment]
Although not shown, in the first embodiment, the floor 7 near the ground such as the first floor may be formed of a flat slab.

[Other Embodiments]
1. The building foundation structure according to the present invention may be applied to a building in which a seismic wall is provided in the center of the building.
2. The building foundation structure according to the present invention may be applied to a building having one earthquake-resistant wall.
3. The building foundation structure according to the present invention may be applied to an underground floor having two or more levels.
4). The building foundation structure according to the present invention is constructed by rigidly connecting an outer wall that surrounds the entire basement floor to a flat slab that forms the bottom floor of the basement floor and a floor near the ground. May be.
5). The building foundation structure according to the present invention may be configured using a floor near the ground higher than the ground level, or may be configured using a floor near the ground lower than the ground level.
6). The building foundation structure according to the present invention may be installed on a foundation pile.
7). The building foundation structure according to the present invention has a multi-layered seismic wall in multiple layers at each of the multi-directional ends of the frame, such as the east-west end and the north-south end of the frame that constitutes multiple layers on the ground. It may be a building foundation structure that is connected continuously and rigidly connected to the lower part of the multi-layer seismic walls.

The perspective view which shows the outline of a structural member Schematic diagram of structural members Schematic sectional view of structural members

2 Seismic walls 4 Basement floor 5 Flat slab (bottom floor)
6 Exterior wall 7 Floor near the ground A Building foundation

Claims (2)

It is a building foundation structure that is rigidly connected to the lower part of the seismic wall that is connected across multiple levels on the ground,
Form the bottom floor in the basement floor with a flat slab,
Rigidly connecting the flat slab, the outer wall surrounding the basement, and the floor near the ground ,
A building foundation structure in which the earthquake-resistant wall is rigidly coupled across the floor near the ground and the flat slab .   The building foundation structure according to claim 1, wherein the floor near the ground is constituted by a flat slab.

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