JP2000001861A - Earthquake-resistant cloth foundation structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve aseismicity by arranging a nonwoven fabric impregnated with a liquefied viscoelastic material onto the cobble stones of an excavation section, to which the cobble stones are buried and rolled, and installing a continuous footing onto the nonwoven fabric. SOLUTION: Cobble stones 2 are buried into the excavation ditch 11 of an excavation section 1 excavated to a ground 8 and rolled, a cushioning material 3 consisting of a nonwoven fabric impregnated with a liquefied viscoelastic material is disposed onto the cobble stones 2, and a continuous footing 4 is constructed onto the cushioning material 3. The cobble stones 2, in which crushed stones are covered with the viscoelastic material, are buried into the excavation ditch 11 and rolled as required at that time. A molded rubber board is laminated on the cushioning material 3 in place of the cobble stones 2, and the continuous footing 4 is built onto the molded rubber board. A U-shaped tank, in which a recessed section is formed to a top face in the longitudinal direction, is arranged to the excavation section 1, the nonwoven fabric made of a synthetic resin containing a liquefied high molecular material displaying rubber elasticity after curing is laid into the recessed section, the upper section of the nonwoven fabric is filled with the cobble stones 2 and the cobble stones are rolled, and the continuous footing 4 is constructed onto the cobble stones 2. Accordingly, vibrations, impacts, etc., from a structure and the ground can be absorbed, and the structure can be executed easily by a conventional construction method.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an earthquake-resistant cloth base structure for supporting a building such as a building.

[0002]

2. Description of the Related Art Conventionally, a fabric foundation structure of a building structure is a fabric foundation structure in which a trench is excavated on the ground at the site and a fabric foundation is constructed in the trench.

[0003]

The conventional fabric foundation structure sufficiently functions as a fabric foundation in a normal state.
However, earthquakes with high seismic intensity or nearby structures, for example,
There is a problem in that a vibration load acts directly on a structure via a cloth foundation because there is no or small buffering function against traffic vibration of a railway, a road or the like. To solve this problem, it is clear that it is advisable to absorb as much as possible of the energy of the ground itself, such as an earthquake, in the ground.
The development of a fabric foundation structure that imparts seismic resistance to structures and does not cause pollution is an important issue in terms of earthquake countermeasures, pollution prevention, and environmental protection. Therefore, an object of the present invention is to provide a seismic-resistant fabric base structure capable of absorbing and mitigating vibration and impact from a structure or the ground by interposing a material capable of mitigating vibration and impact.

[0004]

In order to solve the above-mentioned problems, in the earthquake-resistant cloth foundation structure according to the first aspect of the present invention, a liquid viscous material is placed on the rock-cut portion of the root cutting portion where the rock-cut is buried and compacted. A cushion material made of a nonwoven fabric impregnated with an elastic material is disposed, and a cloth foundation is constructed on the cushion material.

According to a second aspect of the present invention, there is provided an earthquake-resistant cloth foundation structure.
It is characterized in that rubble stone in which crushed stone is covered with a viscoelastic material is buried in the root cutting groove of the root cutting part described above and is compacted.

According to a third aspect of the present invention, there is provided an earthquake-resistant cloth foundation structure.
A cushion material made of a non-woven fabric impregnated with a liquid viscoelastic material is arranged on the rubble stone of the root cutting part described above, and a laminated part obtained by laminating a molded rubber plate is arranged thereon, and a cloth is placed on the laminated part. The feature is that the foundation was constructed.

According to a fourth aspect of the present invention, a base material having a U-shaped concave portion on the upper surface in the longitudinal direction is arranged at a root cutting portion.
After laying an elastic body exhibiting rubber elasticity in the concave portion, the elastic body is filled with chestnut stone and rolled, and a cloth foundation is constructed on the chestnut stone.

According to a fifth aspect of the present invention, a U-shaped tank having a concave portion on the upper surface in the longitudinal direction is arranged at the root cutting portion, and the concave portion contains a liquid polymer material which exhibits rubber elasticity after curing. After laying the nonwoven fabric made of synthetic fiber, the rock is filled and compacted on the nonwoven fabric, and a cloth foundation is constructed on the rock stone.

According to a sixth aspect of the present invention, there is provided an earthquake-resistant cloth foundation structure.
Alternatively, the chestnut stone of No. 5 is characterized by being formed by coating crushed stone with a viscoelastic material exhibiting viscoelasticity such as rubber / asphalt, polyurethane and the like.

[0010]

[Function] When the load caused by the weight of the building structure or the building structure acts on the fabric foundation, the vertical load applied to the fabric foundation is reduced by the cushioning material, the laminated portion, the elastic body, the nonwoven fabric, and the combination portion of the chestnut (hereinafter referred to as cushion). The cushion portion is compressed and deformed. On the other hand, when a load in the horizontal direction acts on the fabric foundation, a shear load acts on the cushion portion to cause shear deformation. Both the compression deformation and the shear deformation of the cushion portion have a time delay between the load and the deformation, that is, there is a phase difference, which is called a loss angle δo, and the right angle (tan δo) is a degree of heat loss of vibration energy. Which is absorbed by the cushion as heat energy. That is, the energy of the external force is converted into heat to reduce vibration and impact. In this case, the shear elastic modulus (shear spring coefficient)
Is smaller than the compression elastic modulus (compression spring coefficient), so that the structure has a large supporting spring coefficient in the up-down direction and tends to be softer in the left-right direction. That is, the earthquake-resistant cloth foundation structure of the present invention absorbs and relaxes a part of the energy of vibration or impact as thermal energy with respect to external force from both the vertical direction (vertical direction) and the horizontal direction (left-right direction). There is action.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. First embodiment shown in FIG. 1 (Claim 1)
As shown in the figure, a root cutting portion 1 is excavated in the ground 8 and a rock stone 2 is buried in the root cutting portion 1 to be compacted.
A cushion material 3 made of a non-woven fabric impregnated with a liquid viscoelastic material is disposed on the top. Further, the cushion material 3
A cloth foundation 4 is installed on the upper side. The rubble stone 2 uses crushed stone, ore, or the like, and the liquid viscoelastic material is rubber / asphalt, asphalt / polyurethane, or the like. The cloth foundation 4 is constructed of RC or PC concrete. The vibration of the structure (not shown) and the ground 8 is absorbed and reduced by the cushion material 3. Further, as in the second embodiment (Claim 2) shown in FIG. 2, in the root cutting groove 11 of the root cutting portion 1 of the first embodiment, the rock stone 2a in which the crushed stone 76 is covered with the viscoelastic material 21 is provided. It is formed by embedding and rolling. The crushed stone 76 may be an ore. Viscoelastic material 21
Is rubber / asphalt, asphalt / polyurethane and the like.

Further, as in a third embodiment (claim 3) shown in FIG. 3, a cushion material 3 made of a nonwoven fabric impregnated with a liquid viscoelastic material is provided on the root cutting portion 1 of the first embodiment. In addition to the arrangement, a laminated portion 6 in which a molded rubber plate 5 is laminated is formed thereon, and the cloth foundation 4 is installed on the laminated portion 6.

Next, as in the fourth embodiment shown in FIG. 4 (Claim 4), the base material 7 having the U-shaped concave portion 71 on the upper surface in the longitudinal direction is provided on the ground 8 at the root cutting portion 1. Arrange the recess 7
After laying an elastic body 72 exhibiting rubber elasticity on the stone body 1, the chestnut stone 2 is filled and rolled on the elastic body 72, and the cloth foundation 4 is placed on the chestnut stone 2.
Is constructed.

As in the fifth embodiment shown in FIG. 5 (claim 5), a U-shaped tank 74 which is a rigid product made of reinforced concrete, steel or the like, having a concave portion 73 on the upper surface in the longitudinal direction, is cut off. In the concave portion 73, a nonwoven fabric 75 made of a synthetic fiber containing a liquid polymer material exhibiting rubber elasticity after curing is provided.
Is laid. Further, on the non-woven fabric 75, a stone 2
, And the cloth foundation 4 is constructed on the chestnut stone 2. As in the sixth embodiment (Claim 6) shown in FIG.
The chestnut stone 2 of the fourth or fifth embodiment is formed by covering crushed stone, ore 76, or the like with a viscoelastic material 21 that exhibits viscoelasticity, such as rubber, asphalt, or polyurethane.

[0015]

Since the present invention is configured as described above, the following effects can be obtained. The cushioning material and the material that can reduce the vibration and shock that develops viscoelasticity are interposed between the fabric base and the base material or the U-shaped tank, so that the vibration and shock from the structure and the ground can be absorbed and reduced. It can be easily constructed using conventional construction methods. The structure absorbs a part of the energy of vibration and shock as thermal energy and can be relaxed by external force from both vertical direction (vertical direction) and horizontal direction (horizontal direction). it can.

[Brief description of the drawings]

FIG. 1 is a partial sectional view of a first embodiment of a fabric foundation structure of the present invention.

FIG. 2 is a cross-sectional view of a chestnut stone according to a second embodiment of the present invention.

FIG. 3 is a partial sectional view of a third embodiment of the cloth foundation structure of the present invention.

FIG. 4 is a partial sectional view of a fourth embodiment of the cloth foundation structure of the present invention.

FIG. 5 is a partially cutaway sectional view of a fifth embodiment of the cloth foundation structure of the present invention.

FIG. 6 is a cross-sectional view of a chestnut stone according to a sixth embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Root cutting part 11 Root cutting groove 2, 2a Kuriishi 21 Viscoelastic material 3 Cushion material 4 Cloth base 5 Molded rubber plate 6 Laminated material 7 Base material 71 Depression 72 Elastic body 73 Depression 74 U-shaped tank 75 Non-woven fabric 76 Crushed stone

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Akihiro Umezawa 7-8 Sakaemachi, Kashiwazaki-shi Fujimura Hume Tube Co., Ltd. F-term (reference) 2D046 BA00 DA11

Claims (6)

[Claims] 1. A cushion material made of a non-woven fabric impregnated with a liquid viscoelastic material is disposed on a rock-cut portion of a root cutting portion where a rock stone is buried and compacted, and a cloth foundation is constructed on the cushion material. The basic structure of earthquake-resistant cloth. 2. The root cutting groove of the root cutting part according to claim 1,
Earthquake-resistant fabric foundation structure characterized by embedding rubble stone in which crushed stone is covered with a viscoelastic material and rolling it. 3. A cushioning member made of a non-woven fabric impregnated with a liquid viscoelastic material is arranged on the rubble stone of the root cutting portion according to claim 1, and a laminated portion formed by laminating a molded rubber plate is formed thereon. And a fabric foundation is constructed on the laminated portion. 4. A base material provided with a U-shaped concave portion on the upper surface in the longitudinal direction is arranged at the root cutting portion, an elastic body exhibiting rubber elasticity is laid in the concave portion, and the stone is filled and rolled over the elastic body. A quake-resistant cloth foundation structure characterized by pressing and laying a cloth foundation on the chestnut stone. 5. A U-shaped tank provided with a concave portion in a longitudinal direction is arranged at a root cutting portion, and a non-woven fabric made of synthetic fiber containing a liquid polymer material exhibiting rubber elasticity after curing is laid in the concave portion. And a rubble stone is filled and compacted on the non-woven fabric, and a cloth foundation is constructed on the rubble stone. 6. The crushed stone according to claim 4 or 5, wherein
An earthquake-resistant fabric basic structure formed by coating with a viscoelastic material exhibiting viscoelasticity such as asphalt or polyurethane.