JPH08232501A - Structure of foundation for building - Google Patents

Abstract

PURPOSE: To prevent a building from being damaged when a huge earthquake occurs, by a method wherein part of a foundation bed and foundation are so formed as to be easy to disintegrate as compared with the other part thereof and are disintegrated by its vibrational energy only at the occurrence of the huge earthquake, and they are apparently separated from the building, and hence the vibration of them is not directly propagated to the building. CONSTITUTION: Ground 1 is leveled and strengthened in conformity with predetermined regulations, according to the shape and scale of a building 3. A foundation 2 is formed on the place whereat broken stones 4 are laid and leveling concrete 5 is placed. The building 3 is constructed in conformity with predetermined regulations and is made earthquakeproof. In addition, part of the foundation 2 is formed of a disintegrable material layer 21 which is made a little weaker than the other part thereof, and is so formed as to be disintegrated only by its vibrational energy at the occurrence of a huge earthquake. In this way, the connection between the foundation 2 and the building 3 is apparently released. Granular and lump material desintegrated lies between the ground 1, the foundation 2 and the building 3, and prevents the vibration of the foundation 2 from being directly propagated to the building 3, and hence the quake of the building 3 is made smaller and the building 3 is saved from its damage.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a basic structure of a building.

[0002]

2. Description of the Related Art Generally, when constructing a building such as a house, first, the ground of the land is leveled or strengthened for maintenance, and then foundation concrete is struck there to build a base or foundation, Furthermore, the work will proceed according to the procedure of building a building on it.

[0003]

[Problems to be Solved by the Invention] Concerning the building, the building coverage and height, and many other standards have been established, and the building is built to meet all of these standards, and is used. The above safety is aimed at. Especially in Japan, because earthquakes frequently occur, the structure of the building, as well as the foundation and the foundation, is strong enough to withstand an earthquake stronger than the earthquake specified by the building standards. I am trying. Furthermore, in high-rise buildings, the building itself has a flexible structure to absorb and absorb the shaking of the earthquake itself, or in low-rise buildings, the building is formed separately from the base and foundation to create a foundation. A so-called seismic isolation structure was attempted in which a spring-type support was interposed between the building and the building so that the shaking of the earthquake could be absorbed by the support so that the destructive force of the earthquake would not act directly on the building. ing. However, the method of making the building flexible structure is effective for high-rise buildings, but has no effect for middle-rise or low-rise buildings. Further, the method of attaching the spring type support between the base and the building cannot exert its effect because the weight acting on the support is too large in a middle-rise building. On the other hand, in small buildings such as low-rise buildings and houses,
Although the support exerts its effect, there is a drawback that the structure to which this method can be applied is significantly limited because a space for mounting the support must be formed between the base and the building. Especially, in a small building such as a house, it cannot be applied further because the construction cost increases. Moreover, this method maintains the same slinging property for several decades from the time of building a building until the occurrence of a huge earthquake, or for longer than that, and keeps the building in a certain state (since it completely sinks). There is also the problem that it is difficult to produce a support that can be supported (without any assistance). However, even in the case of a building with such an earthquake-resistant structure or a base-isolated structure, if a "great earthquake" that is stronger than expected occurs, the building will not be damaged or collapsed. I cannot escape. It is an object of the present invention to provide a foundation structure that does not function in a normal earthquake but functions only when a huge earthquake occurs to protect a building from damage.

[0004]

According to the present invention, a building is usually formed by integrally joining a building to a base or a base, and when an earthquake occurs, the base and the base are almost the same as the ground. In view of the fact that it vibrates and its energy is directly transmitted to the building through the base or foundation, a part of the base or foundation is made easier to collapse than other parts by using a collapsible material. When a huge earthquake occurs, the vibration of the base and base at that time causes the part to collapse, apparently dividing the base and base from the building, and the energy of the earthquake from the ground. The above-mentioned problems are solved by means that the information is transmitted to the base and the base, and is not directly transmitted from the base and the base to the building. The parts of the base or base that are more likely to collapse than others can be formed of cellular concrete.

[0005]

According to the present invention, a part of the base or the base is formed so as to be collapsed by the energy when the huge earthquake occurs, so that when the huge earthquake occurs, the part of the base or the base collapses and it is apparent. It will be separated from the upper building. Moreover, since the collapsible material that has collapsed into a granular or lump form is present between the base or foundation and the building, the energy of the earthquake is not directly transmitted to the building, and the building becomes less shaking and damages. Escape.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The basic structure of a building according to the present invention will be specifically described below based on the illustrated embodiments. In Figure 1, the ground 1
An example is shown in which the base 2 is formed and the building 3 is built on it. These are no different from ordinary buildings except that a part of the base 2 is formed by the collapsible material layer 21. That is, the ground 1 is leveled and strengthened according to a predetermined standard in accordance with the shape and scale of the building 3, and in accordance with the usual method, the rubble stones 4 and waste concrete 5 are struck and the base 2
Are formed. Similarly, the building 3 is also constructed in accordance with a predetermined standard and is provided with earthquake resistance. Further, the base 2 is partially formed by the collapsible material layer 21, and that part is slightly weaker than the other parts of the base 2,
Even if the collapsible material layer 21 is not formed, the collapsible material layer 21 does not collapse due to an earthquake that does not damage the building 3 and functions as it is as a part of the base 2.
When a huge earthquake that damages the building occurs, the vibration energy at that time causes it to collapse for the first time, and the connection between the base 2 and the building 3 is released, so that the vibration of the base 2 directly reaches the building 3. It is not transmitted. Therefore,
The material and structure of the collapsible material layer 21 are not particularly limited. In short, it is sufficient if it is a part of the base 2 in a normal state and it collapses only when an earthquake of a certain level or more occurs, and from the above-mentioned point, it is almost horizontal layered. Therefore, it is desirable to use it as a spacer between the base 2 and the building 3. As an example of this, aerated concrete having a porosity of about 50 to 70% is used.
Moreover, the thickness and area of the building 3 do not collapse due to an earthquake that does not damage the building 3 even if it does not collapse,
It functions as a part of the base 2 as it is, and when a huge earthquake occurs that would damage the building 3 if it does not collapse, the strength is determined so that the energy at that time causes the collapse.

When a huge earthquake occurs and the collapsible material layer 21 collapses, the connection between the base 2 and the building 3 is released, and the vibration of the base 2 is not directly transmitted to the building 3. In particular, when the collapsible material layer 21 is formed into a substantially horizontal layer, when the material layer 21 collapses, the building 3 is placed on the base 2 and moreover, between the base 2 and the building 3. Is interspersed with granular or lumpy disintegrating material.

[0008]

As described above in detail, according to the present invention, a part of the foundation or the foundation, which is a basic structural part of a building, is not collapsed by an earthquake to the extent that the building is not damaged, and it is as it is. It is formed by a collapsible material layer that functions as a part of the foundation and collapses for the first time due to the energy at the time of a huge earthquake that damages the building. When the occurrence occurs, the fixed state of the building due to the foundation and the foundation is released, the vibration of the earthquake is not directly transmitted to the building, the vibration of the building becomes extremely small, and damage is avoided. In particular, when the collapsible material layer is formed into a substantially horizontal layer by using cellular concrete having a porosity of about 50 to 70%, when it collapses, it becomes a lump or a granular body through which the building or It will be placed on the base. As a result, when the building moves laterally on the base or the base, it acts as a roller, and when the building moves up and down, it acts as a shock absorber, which alleviates the cause of damage to the building.

[Brief description of drawings]

FIG. 1 is a sectional view schematically showing an embodiment of the present invention.

[Explanation of symbols]

 1 Ground 2 Foundation 3 Building 4 Split quarry stone 5 Waste concrete 21 Collapsible material layer

Claims (2)

[Claims] 1. When a part of the base or base is formed of a collapsible material layer that is more easily collapsed than other parts, and when an earthquake of a certain strength or more occurs, the base or base at that time is The building is characterized in that the vibrating energy causes the part to collapse, apparently releasing the connection between the base or foundation and the building, and the vibration of the base or foundation not being directly transmitted to the building. Foundation structure. 2. The basic structure of a building according to claim 1, wherein the collapsible material layer is cellular concrete having a porosity of about 50 to 70%.