JPH11158888A - Method for constructor damped vibration foundation of building and damped vibration foundation constructed thereby - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lower subsoil of a building having a damped vibration effect and a method for constructing its foundation, for obtaining the damped vibration effect of the building through the improvement of the lower subsoil on which the building is erected and of a foundation structure. SOLUTION: A sliding layer is formed in an appropriate thickness of a sliding material on a solid lower subsoil, and a box foundation structure 18 comprising a plurality of boxes each having a downwardly-pointed bottom-face projection defining a part 14 on its bottom surface is constructed on the sliding layer. Next, soil is put into each box while the amount of soil in each box space is adjusted so that the load of all structures applied to the solid subsoil is almost averaged, to form a box foundation subsoil A. Next, a horizontal-motion absorbing foundation subsoil C is formed around the box foundation subsoil A by use of a horizontal-motion energy absorber 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seismic reduction foundation structure among the foundation construction means for buildings.

[0002]

2. Description of the Related Art In the past, as a foundation of a building having an earthquake-reducing effect, as shown in FIG. 1, a ground was dug down, and sliding materials such as cobblestones (2) were laid on a solid ground (1). On the top, a thin sand layer (3) and a clay layer (4) are stacked and tamped to form a foundation ground (5) having a suitable surrounding property, and the surrounding ground is left as it is as a buffer part. As shown in FIG. 2, there are provided many vibration-reducing means such as a vibration-reducing rubber device (7) using vibration-reducing rubber at the lower part of a pillar. The old seismic damping foundation shown in FIG. 1 is hardly adopted at present, and the means shown in FIG. 2 is gradually adopted in recent building construction and the like. However, such means are not widely adopted in ordinary houses, etc., and the main focus on buildings such as houses is to make the buildings themselves earthquake-resistant or earthquake-resistant, rather than the earthquake-resistant structures on the ground where the buildings are built. At present, there has not yet been provided any means for configuring the foundation ground of a building as ground having a seismic reduction effect.

[0003]

SUMMARY OF THE INVENTION The present invention seeks to obtain the seismic reduction effect of a building by improving the lower ground where the building is built and the foundation structure. The basic construction method is not provided.

[0004]

The present invention is constituted by the following means. That is, if the lower ground of the building construction site is a solid ground, the ground is formed on the ground if the ground is soft, and if the ground is soft, the ground is formed into a solid lower ground by consolidation, and a cobblestone or the like slides on the lower ground. The base material is laid out to form a sliding layer, and then the concrete base is cast on the sliding layer or assembling of modular parts to form a box base structure, and the whole building including the structure is constructed. The foundation ground is constructed by putting earth and sand into the space of each box so that the load is applied approximately evenly to the lower ground, and the horizontal kinetic energy absorbing material is provided around the foundation structure. The above problem was solved by adopting a configuration in which a horizontal dynamic absorption foundation ground was formed with an appropriate width from the lower ground to the ground surface.

Next, these structures will be described in detail with reference to the drawings, which are embodiments. (1) Regarding the formation of a solid lower ground at the site where the building is to be constructed. As shown in FIG. 3, the depth of the foundation foundation ground, which will be described later, is determined according to the scale of the building to be constructed. Therefore, the depth from the surface to the depth of the sliding layer formation (8) is required. If the next ground after digging down the area and removing the sediment and removing the sediment is a strong natural lower ground (1) that can withstand the weight of the building, it can withstand the load of the building on the ground (1). When there is no soft ground, the entire soft ground is compacted by a known ground consolidation method to form a strong lower ground (1 '). The solid lower ground (1 ') in FIG. 3 is a ground formed by consolidation. In addition, strong lower ground (1)
It is best to finish the surface of (1 ') smoothly.
(2) Formation of the sliding layer Next, on the solid lower ground (1) (1 '), the entire area (width) where the building (9) is to be built,
A spherical sliding material (17) such as a glass ball, a metal ball, and a boulder is laid to an appropriate thickness to form a sliding layer (11) (FIG. 3). The thickness of the sliding layer (11) is determined by a bottom projection section (14) provided on the bottom surface (12) of the box (15) (16) described later.
It is assumed that the layer thickness is larger than the length. The sliding member is a plate sliding member which generates a bearing effect such as a hard synthetic resin plate, a hard natural rubber plate, a hard synthetic resin plate, a hard artificial rubber plate, a wood plate, a non-rusting metal plate, etc. (13) (FIG. 4) May be laminated as a single material. The sliding layer (11) may be formed by alternately laminating the spherical sliding member (17) and the plate sliding member (13) (FIG. 5).

(3) Construction of the foundation foundation of the housing The foundation foundation of the housing is composed of a housing and earth and sand to be put into the housing, and the housing is a cast-in-place body (15) (FIG. 3).
And a module assembly box (16) (FIG. 5).
The cast-in-place body (15) has a sliding layer (1) as shown in FIG.
1) A mold frame is assembled on a cobblestone (2) as a forming material into a required box shape, and a concrete box is formed to form a box base structure (18). At this time, care must be taken that the bottom surface (12) of the housing is smooth and a bottom projection section (14) is provided on each bottom surface (12) of each housing section.
1) It is formed integrally with the housing (15) with a length that fits easily. Next, when the housing is configured as a module assembling housing (16), it is modularized so that it can be easily assembled for each housing (16), and is manufactured at a factory and assembled on site to form a housing basic structure. Make up the body (18). Of course, it is the same as the former that the bottom surface (12) of the housing is smooth and the formation of the bottom projection partition (14). The housing basic structure (18) is partially configured to have an appropriate height above the ground and to protrude as a cloth foundation (19) (FIGS. 3 and 4). In the space below the ground, the space of each box (15) (16) has a solid lower ground (1).
(1 ') The ground foundation (A) is constructed by charging earth and sand, etc., while adjusting the load of the entire structure including the building, which is applied to the entire surface, to be substantially equalized. As described above, the box foundation ground (A) is composed of the box foundation structure (18) and the earth and sand (22) put into it.

(4) Formation of Horizontal Ground for Absorbing Horizontal Motion On the entire circumference of the box base structure (18), the surrounding ground (B) is formed with an appropriate width using soft soil, soft rubber, soft synthetic resin, glass. Fiber, resin fiber, sponge and other surrounding ground (B)
The horizontal dynamic energy-absorbing material (20) made of a softer material forms the horizontal dynamic absorbing foundation ground (C). The depth of the ground (C) is determined from the surface of the ground to the strong lower ground (1) (1 ')
The width should be sufficient to absorb the roll at the expected maximum seismic intensity. Of course, since the rolling energy is absorbed by the sliding layer (11), the width of the horizontal motion absorbing foundation ground (C) does not need to be particularly widened.

(5) Regarding the body of the horizontal dynamic absorption foundation ground The crown body (21) is a concrete plate of an appropriate thickness which is laid on the surface of the horizontal dynamic absorption foundation ground (C). Optimally, it is provided integrally with the housing substructure (18) at an angle of 45 ° from the surface. In the embodiment of FIGS. 3 and 4, the angle α is 45
°, but depending on the depth of the surrounding ground (B), and thus the height of the housing substructure (18), the softness of the ground (B) or the rolling width of the earthquake expected in the future, the sliding layer Even if the angle α of 45 ° is optimal, the angle α
Is appropriately adjusted.

[0009]

[Action and Effect of the Invention] (1) Action and Effect of Strong Lower Ground Formed by Consolidation If the ground for building construction is strong lower natural ground (1), no consolidation is required, but in the case of soft ground Forms a strong lower ground (1 ') by consolidation with the consolidation depth adjusted according to the weight of the building to be built, so that the ground (1') has the function and effect of sufficiently supporting the building. . (2) Next, the operation and effects of the sliding layer will be described. A layer formed of a spherical sliding material (17) or a plate sliding material (13) with an appropriate thickness on the strong lower ground (1) (1 '). However, both the spherical sliding member (17) and the plate sliding member (13) have a bearing action,
When the horizontal movement (rolling) phenomenon occurs on the strong lower ground (1) (1 ') during the earthquake, the strong lower ground (1)
A bearing effect is produced between (1 ') and the sliding layer (11) and also between the laminated plate bodies, whereby the rolling effect is absorbed and the amplitude of the sliding layer is reduced.

(3) Next, the operation and effects of the box foundation ground (A) will be described. The layer (A) is composed of the box base structure (18) and the earth and sand put into each box space, and the bottom (12) of the box bottom (10) is used when the earthquake rolls. It is formed smoothly so as to generate a bearing action between the sliding layer (11) and is in contact with the sliding layer (11), and the bottom projection section (14) provided on each of the housing bottom surfaces (12) is firmly fixed. So that it does not touch the lower ground (1) (1 ') (Figs. 3 and 4)
It is mounted on the sliding layer (11) in a simple configuration, so that when the earthquake rolls, the base foundation (A) and the sliding layer (11)
Between them, a bearing effect is generated to absorb the rolling energy. In addition, plate sliding material (1
When 3) is used, a bearing action is also generated between the laminated plate members (13), so that the absorption of horizontal kinetic energy is further increased and the effect of vibration reduction is further enhanced. Also, at the time of rolling, the sliding members (13) and (17) surrounded by the bottom projecting partition (14) are rolled because the bottom projecting partition (14) is projected and inserted into the sliding layer (11). Has the effect of preventing the sliding layer from leaning to one side, so that the sliding layer is always kept in a normal state and has an effect of absorbing horizontal kinetic energy during an earthquake. Next, earth and sand (22) is put in the space of each box (15) (16) of the box base structure (A), and the amount of each sand (15) (16) is The amount of sediment is adjusted so that the load of a structure (structure) built on the strong lower ground (1) (1 ') is substantially equalized, and the sliding layer (11) Full and lower ground
(1) The applied load is almost the same at any point on the entire surface of (1 '), and has the effect of not causing the land subsidence due to the unbalanced load of the whole building, and has an effect. Also, the difference in the amount of sediment put into each box (15) (16) means that the space of each box can be used for the underfloor storage (23) or the basement (24). It also has the effect of being usable. Of course, there is also an advantage that the load adjustment material (such as earth and sand) can be introduced or taken out later, and the amount of earth and sand can be finely adjusted. That is, there is a great effect that it is possible to cope with a change in the load on a part of the ground due to the rearrangement of furniture and fixtures inside the building or the arrangement of the facilities. In FIG. 4, (23) is a storage and (24) is a basement, each of which uses a space. The part of the box foundation structure (18) that is partially exposed on the ground surface is the cloth foundation (19) part of the conventional building foundation. Since there is enough space, a ventilation opening can be provided in the cloth foundation (19), and there is no obstacle to ventilation under the floor.

(4) Action and Effect of Horizontal Motion Absorbing Foundation Ground This ground (C) is formed of the above-mentioned material, and is located between the housing foundation ground (A) and the surrounding ground (B). To the appropriate lower width, but from the surface to the solid lower ground (1)
In the ground (C) formed at a depth up to (1 '), the material is softer than the surrounding ground (B). The horizontal kinetic energy is absorbed between the foundation ground (A) and the surrounding ground (B). That is, the roll of the earthquake reduced by the bearing action and effect of the sliding layer (11) is further caused by the horizontal kinetic energy-absorbing material (20) formed on the entire circumference of the box foundation ground (A). The effect is obtained that the vibration is further absorbed by the dynamic absorption foundation ground (C) and the vibration is reduced.

(5) Action and effect of the crown body The crown body (21) is crowned on the surface of the sliding layer (11), and the lower end thereof is integrally formed with the box base structure (18). The effect is that the horizontal dynamic absorption foundation ground (C), which is made of a softer material than the surrounding ground (B), transfers its horizontal kinetic energy in the event of an earthquake.
(B) is absorbed and is attenuated. In this case, if there is no crown body (21), the horizontal kinetic energy of the earthquake
Is too strong to absorb this, and there is a risk that the material forming the horizontal motion absorbing foundation ground (C) may be pushed up to the surface of the ground. Therefore, the concrete crown body (21) is designed to prevent this. It acts to suppress this pushing force. In that case, a part of the horizontal kinetic energy will not be absorbed, but the crown body (21) will have an appropriate inclination angle α.
Since the horizontal kinetic energy from the surrounding ground (B) applied to the crowned body (21) is also absorbed in the direction of the arrow (P), the crowned body is easily formed. (1
2) will not be pushed up. That is, a part of the horizontal kinetic energy is absorbed and attenuated by the inclined configuration of the crown body (12). Of course, if the horizontal dynamic absorption foundation ground (C) is formed wide as shown in FIG. 3 (C '), the need for the crown body (21) is eliminated. As described above, the present invention has been able to solve the problem by seeking the seismic reduction effect of a building during an earthquake from the conventional seismic reduction structure of the building to the lower ground and the foundation structure where the building is built. .

[Brief description of the drawings]

BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is an explanatory view of an example of an earthquake-reducing foundation ground that has been adopted in the past.

[Fig. 2] Anti-vibration rubber equipment currently used

FIG. 3 is an explanatory view of an embodiment in which a box foundation structure is formed by casting in place on a solid lower foundation ground formed by consolidation, and a part of the horizontal dynamic absorption foundation ground has a cap body. It is an explanatory view of an example in which a horizontal dynamic absorption foundation ground (C ′) formed wide without being provided.

FIG. 4 is an explanatory view of an embodiment in which the housing basic structure is configured as a module housing and the sliding layer is formed of a plate sliding material.

FIG. 5 is an explanatory view of an embodiment in which the sliding layer is a composite laminate of a spherical sliding material and a plate-like sliding material.

[Explanation of symbols]

 1 Strong lower natural ground 1 'Strong lower ground (formed by consolidation) 2 Cobblestone 3 Sand layer 4 Clay layer 5 Surroundable foundation ground (by old construction method) 6 Soft ground around old earthquake-reducing ground 7 Anti-vibration rubber device 8 Depth of removal of earth and sand from the ground surface 9 Building 10 Bottom part of box 11 Sliding layer 12 Bottom of box 13 Sliding material 14 Bottom projection section 15 Cast-in-place box 16 Module assembly box 17 spherical sliding material (cobblestone etc.) 18 housing basic structure 19 cloth foundation 20 horizontal kinetic energy absorbing material 21 capping body 22 earth and sand (put into the housing space of the housing basic structure) 23 storage 24 basement 25 Foundation stone 26 Pillar 27 Foundation A Box foundation ground B Peripheral ground (around the box foundation structure) C Horizontal motion absorption foundation ground C 'Wide horizontal motion absorption foundation ground without occluding body α Box foundation structure Between the body and the crown Formation angle P Arrow (direction of absorption of rolling vibration)

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[Procedure amendment]

[Submission date] January 13, 1998

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] Brief description of drawings

[Correction method] Change

[Correction contents]

[Brief description of the drawings]

BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is an explanatory view of an example of an earthquake-reducing foundation ground that has been adopted in the past.

[Fig. 2] Anti-vibration rubber equipment currently used

FIG. 3 is an explanatory view of an embodiment in which a box foundation structure is formed by casting in place on a solid lower foundation ground formed by consolidation, and a part of the horizontal dynamic absorption foundation ground has a cap body. It is an explanatory view of an example in which a horizontal dynamic absorption foundation ground (C ′) formed wide without being provided.

FIG. 4 is an explanatory view of an embodiment in which the housing basic structure is configured as a module housing and the sliding layer is formed of a plate sliding material.

FIG. 5 is an explanatory view of an embodiment in which the sliding layer is a composite laminate of a spherical sliding material and a plate-like sliding material.

[Description of Signs] 1 Strong lower natural ground 1 'Strong lower ground (formed by consolidation) 2 Cobblestone 3 Sand layer 4 Clay layer 5 Soilable foundation ground (by old method) 6 Old earthquake-reducing ground Soft ground around the building 7 Anti-vibration rubber device 8 Depth of removal of earth and sand from the ground surface 9 Building 10 Bottom part of box 11 Sliding layer 12 Bottom of box 13 Plate sliding material 14 Bottom projection partitioning part 15 Casting body 16 module Assembling box 17 Spherical sliding material (cobblestone etc.) 18 Box foundation structure 19 Cloth foundation 20 Horizontal kinetic energy absorbing material 21 Crown body 22 Sediment (entered in the box space of the box foundation structure) 23 Storage 24 Basement 25 Base stone 26 Pillar 27 Foundation A Box base ground B Peripheral ground (around the box base structure) C Horizontal motion absorption base ground C 'Wide horizontal motion absorption base ground without occluding body α Box Foundation Forming the granulated material and the crown adhesive body angle P arrow (absorption direction YokoYura seismic)

Claims (9)

[Claims] 1. A housing comprising a plurality of housings in which a sliding layer is formed with a suitable thickness on a solid lower ground with a sliding material, and a bottom surface protruding section is formed on the bottom surface on the layer. Constructing the foundation structure, and then, in each case, adjusting the amount of sediment in each case space so that the load of all structures applied to the strong ground is approximately averaged, A seismic reduction foundation for a building, characterized by having a structure in which a horizontal dynamic energy absorbing ground is formed with a horizontal dynamic energy absorbing material in the vicinity of a base foundation ground. 2. Excavating a required area at a required depth on a ground to be constructed of a building to remove sediment,
A sliding layer having an appropriate thickness is formed with a sliding material having a bearing effect on the solid ground below the excavated portion, and an appropriate length of the appropriate length directed downward from the bottom of the box for each box on the layer. Construct a substructure consisting of a plurality of housings with a bottom projection section, and then reduce the amount of sediment in each housing space so that the load of all buildings applied to the strong lower ground is approximately equalized. It is necessary to construct the base foundation ground by inputting it while adjusting it, and to form a horizontal dynamic absorption base ground with horizontal kinetic energy absorbing material from the strong lower ground to the surface with appropriate width around the base foundation ground. Characterized by the earthquake-absorbing foundation method for buildings. 3. The horizontal dynamic absorption foundation ground is fixed to the horizontal motion absorption foundation ground at an appropriate position on the outer wall of the box foundation structure from the surface of the horizontal dynamic absorption foundation ground. The earthquake-reducing foundation of the building according to 1. 4. The building according to claim 1, wherein when the construction ground of the building is soft ground, the ground is formed into a solid lower ground by consolidation. An earthquake-reducing foundation method for a seismic-reducing foundation or a building according to claim (2). 5. A seismic reduction foundation for a building according to claim 1, wherein the housing basic structure is constituted by integrating a plurality of housings by casting a concrete in place. Or the earthquake-reducing foundation method for a building according to claim (2) or (4). 6. The housing as claimed in claim 1, wherein the housing is modularized, each member is produced in a factory, and assembled on site to form a housing base structure. Or the seismic-reduction foundation of the building described in (5) or the seismic-reduction foundation method of claim (2) or (3) or (4) or (5). 7. The sliding layer according to claim 1, wherein the sliding layer is made of a material of a hard sphere having a bearing effect, such as a gravel, a cobblestone, a glass ball, a metal sphere, and a hard synthetic resin sphere. (3) or (4) or (5) or (6), or the seismic reduction foundation for a building according to (2) or (4) or (5) or (6). 8. A single material laminated structure or a composite laminated structure of a plate body having a bearing effect such as a hard synthetic resin plate or a hard natural rubber plate, a hard artificial rubber plate, a wood plate, a stone plate, a non-rusting metal plate, etc. The seismic reduction foundation for a building according to any one of claims 1 to 3, wherein the structure is configured as a structure. Or the seismic reduction foundation method of a building according to claim (2) or (4) or (5) or (6) or (7). 9. The horizontal energy-absorbing material of the horizontal energy-absorbing foundation ground is rubber, artificial rubber, synthetic resin, resin fiber,
The above-mentioned (1) or the above-mentioned (1) or characterized in that the sponge, soft soil, clay or the like is made of a material softer than the surrounding ground, and a single material or a mixture of materials capable of absorbing horizontal kinetic energy is buried. (3) or (4) or (5) or (6) or (7) or (8), the seismic reduction base of the building or the claim (2) or (4) or (5) or (6) Or (7)
Or, the seismic reduction foundation method described in (8).