JP2010038207A - Quake-absorbing mat and quake-absorbing base using quake-absorbing mat - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a quake-absorbing mat and a quake-absorbing base using the quake-absorbing mat with a quake-absorbing effect, which is easy to construct and can be constituted so that a structure may not be fixed in ground by dispersing/equalizing a load of the structure. <P>SOLUTION: The quake absorbing mat 13 is constructed from a plate member 13a shaped in rough polygon in top view which is formed by an elastic body, and a plurality of projections 13b formed by the elastic body projected in at least one surface of the plate member 13a. Furthermore, a quake-absorbing base 1 using the quake-absorbing mat 13 is constructed from a first base 11 laid on a base supporting a structure 2 and the quake-absorbing mat 13 laid on the upper surface of the first base 11, additionally a second base 12 fixing the structure 2 is laid on a top surface of the quake-absorbing mat 13. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to seismic isolation mats and seismic isolation ground technology using seismic isolation mats, and in particular, seismic isolation mats that have a seismic isolation effect that prevents the destruction of structures by absorbing seismic forces during earthquakes, and It relates to the technology of seismic isolation ground using seismic isolation mat.

2. Description of the Related Art Conventionally, a technology for a structure having a seismic isolation effect that prevents destruction of a structure by absorbing a seismic force in the event of an earthquake is known. For example, a seismic isolation effect is obtained by interposing a base isolation structure composed of a plurality of laminated rubber or the like as a cushioning material for suppressing seismic force between the foundation and foundation of the structure. (For example, refer to Patent Document 1).
Further, a base-isolated ground in which a foundation is provided on the ground and a slab is installed via a base-isolated structure made of a plurality of rubbers laminated on the foundation is known (for example, see Patent Document 2). ).
JP 2005-113488 A JP 2003-176539 A

  However, in order to arrange the seismic isolation structure, a mold must be provided at the lower part of the foundation, which is expensive. In addition, the seismic isolation structure needs to be structurally determined to determine the arrangement and is not easy to install. In addition, when the foundation is provided and the outer wall is fixed to the foundation, the outer wall and accessories are damaged by the seismic force even if the structure is isolated by the seismic isolation structure. There was.

  Therefore, in view of such problems, the present invention is a seismic isolation mat having a seismic isolation effect and a ground using the seismic isolation mat, which is easy to construct, disperses and averages the load of the structure, and the structure is grounded. To provide a seismic isolation mat that can be configured not to be fixed to the base and a base isolation ground using the seismic isolation mat.

  The problems to be solved by the present invention are as described above. Next, means for solving the problems will be described.

  That is, in claim 1, a planar polygonal plate-like member formed of an elastic body and a plurality of protrusions formed of an elastic body protruding from at least one surface of the plate-like member. It is configured.

  In Claim 2, the engaging part connected with the plate-shaped member adjacent to the said plate-shaped member is provided.

  In Claim 3, It is the seismic isolation ground comprised from the 1st foundation laid in the ground which supports a structure, and the said seismic isolation mat laid in the upper surface of the said 1st foundation, Comprising: The upper surface of the said seismic isolation mat The second foundation to fix the structure to is installed.

  In Claim 4, packing is provided so that the said seismic isolation mat and the outer periphery of a 2nd foundation may be enclosed.

  As effects of the present invention, the following effects can be obtained.

  In claim 1, it is possible to obtain the seismic isolation effect simply by laying the seismic isolation mat, and it is possible to install without preparing a formwork in the lower part of the foundation as in the conventional foundation, so that the installation becomes easy. In addition, since the seismic isolation mat can be laid in various shapes by being combined, it can be laid according to the shape of the bottom surface of the structure. For this reason, it is no longer necessary to lay seismic isolation mats in useless parts, and costs can be reduced.

  In claim 2, it is possible to obtain the seismic isolation effect simply by laying the seismic isolation mat, and it is possible to install without preparing the formwork as in the conventional foundation, so that the installation becomes easy. The seismic isolation mat can be easily transported by removing the connected portion.

  In claim 3, when an earthquake occurs, the seismic force from the ground is directly transmitted to the first foundation, but the seismic isolation mat laid on the first foundation absorbs the seismic force due to its elasticity. Seismic force is not easily transmitted to the second foundation and structure laid on the seismic mat, and seismic isolation is possible. Further, even when a longitudinal earthquake occurs, vibration due to seismic force can be absorbed by the elasticity of the protrusions of the seismic isolation mat. In addition, piping such as water supply and drainage is installed in the space between the seismic isolation mat and the first foundation, so it is isolated.

  In claim 4, the second foundation and seismic isolation mat and the surrounding ground are insulated. For example, even if a rolling seismic force is generated, the packing absorbs the seismic force and is therefore exempted. It will be shaken.

Next, embodiments of the invention will be described.
FIG. 1 is an upper perspective view showing a seismic isolation mat in a laid state according to one embodiment of the present invention, and FIG. 2 is a partial front sectional view showing the configuration of (a) the base isolation ground. (B) Configuration of the base isolation ground FIG. 3 is a side view of the seismic isolation ground, FIG. 4 is a bottom view of the seismic isolation mat according to the embodiment, FIG. 5 is a lower perspective view showing the laid seismic isolation mat, FIG. FIG. 7 is a top perspective view of a seismic isolation mat according to another embodiment, and FIG. 7 is a bottom view showing the seismic isolation mat in a laid state. In addition, the seismic isolation ground concerning a present Example makes the front side of the screen of FIG. 1 the front.

First, the structure of the seismic isolation ground concerning this invention is demonstrated using FIGS. 1-3.
The seismic isolation ground 1 according to the present invention is a ground that supports the structure 2, and includes a first foundation 11 that is laid on the ground that supports the structure 2 and an elastic body that is laid on the upper surface of the first foundation 11. A seismic mat 13 is provided. A second foundation 12 for laying the structure 2 is laid on the upper surface of the seismic isolation mat 13.

  Hereinafter, each element constituting the seismic isolation ground 1 will be described in detail.

  The first foundation 11 is laid on the ground supporting the structure 2 and is made of, for example, concrete. By laying the first foundation 11, the earthquake resistance and water resistance are improved as compared with the case of only the ground. The upper surface of the first foundation 11 is formed as a flat surface, and it is easy to install the seismic isolation mat 13. Further, by laying the first foundation 11 on the entire bottom surface of the structure 2, even if the ground is weak, the load of the structure 2 and the like is distributed and averaged, so that uneven settlement is unlikely to occur.

  The seismic isolation mat 13 is made of an elastic material, for example, hard rubber. Further, the hard rubber may be formed by using a vulcanized rubber, a waste tire, or a powder rubber made from a waste material of an industrial rubber product as a material rubber. By comprising in this way, the waste tire etc. which are waste materials can be used effectively, and it becomes possible to reduce an environmental load.

The seismic isolation mat 13 is integrally formed from a plate-like member 13a and a protrusion 13b. As shown in FIGS. 1, 4 and 5, the plate-like member 13a of the seismic isolation mat 13 is formed in a substantially square shape in plan view.
Further, a dovetail groove 13c or a dovetail handle 13d as an engaging portion is provided on each side of the square of the plate-like member 13a, so that adjacent seismic isolation mats 13 can be connected to each other. The dovetail groove 13c is cut out in a trapezoidal shape in plan view on the side surface of the plate-like member 13a, and the dovetail pattern 13d is seen in plan view slightly smaller than the dovetail groove 13c on the side surface of the plate-like member 13a. It is formed in a trapezoidal shape.

With this configuration, as shown in FIGS. 1 and 5, when the seismic isolation mat 13 is laid on the first foundation 11, the dovetail groove 13c and the ant handle 13d of the seismic isolation mat 13 are provided. Can be easily connected. In addition, it is possible to achieve seismic isolation simply by laying the seismic isolation mat 13, and it is possible to install without preparing a formwork as in the case of a conventional foundation, which facilitates installation. The seismic isolation mat 13 can be easily transported by removing the connected portion. Moreover, since the seismic isolation mat 13 can be laid in various shapes by being combined, it can be laid according to the shape of the bottom surface of the structure 2. For this reason, it is not necessary to lay the seismic isolation mat 13 in a useless portion, and the cost can be reduced.
By using the seismic isolation mat 13, a seismic isolation structure can be easily applied even to a detached house that has not been provided with a seismic isolation structure.

  In addition, the seismic isolation mat 13 is provided with a protrusion 13b on the surface in contact with the first foundation 11. The protrusion 13b is disposed on each lattice point of the square plate member 13a. By configuring in this way, the protrusion 13b can receive the structure 2 and the weight of the second base 12 equally distributed. In addition, a space is created between the seismic isolation mat 13 and the first foundation 11, and this space can be used as a facility piping space for water supply and drainage. In addition, pipes for water supply and drainage will be seismically isolated. Also, the space makes the seismic isolation mat 13 and the piping easy to dry and less likely to decay.

  The projection 13b is composed of a plurality of cylinders. With this configuration, the protrusion 13b does not have a portion where stress is concentrated, such as a constricted portion, and therefore, it is difficult to break due to a load applied to the protrusion 13b.

Next, the second foundation 12 will be described.
The second foundation 12 is provided on the first foundation 11 to fix the structure 2. A second foundation 12 is laid on the upper surface of the seismic isolation mat 13. In other words, the upper surface of the seismic isolation mat 13 serves as a mold for the lower surface of the second foundation 12. The second foundation 12 is made of concrete, and the second foundation 12 and the seismic isolation mat 13 are integrated by hardening the concrete of the second foundation 12. By comprising in this way, the coupling | bonding of the seismic isolation mats 13 and the coupling | bonding of the seismic isolation mat 13 and the 2nd foundation 12 become firm.

  The second foundation 12 is constituted by a solid foundation as shown in FIG. That is, the base of the structure 2 is constructed on the rising portion 12 a of the second foundation 12, and the base 12 b is laid on the entire floor area portion of the structure 2. In this case, the seismic isolation mat 13 is also laid on the entire floor area portion of the structure 2. By comprising in this way, the structure 2 will be fixed on the 2nd foundation 12, the load of the structure 2 will be supported by the whole base 12b of the 2nd foundation 12, and earthquake resistance will improve.

  Further, the second foundation 12 can be constituted by a cloth foundation as shown in FIG. The foundation of the structure 2 is constructed on the rising part 12a of the second foundation 12, and footings 12c are provided on both sides of the lower part of the rising part 12a. In this case, the seismic isolation mat 13 does not necessarily have to be laid on the entire floor area portion of the structure 2. That is, the seismic isolation mat 13 is laid only on a portion that contacts the footing 12c and a portion that is necessary for the seismic isolation. With this configuration, the material cost can be reduced and the operation can be easily performed.

  The structure 2 is fixed on the second foundation 12. The structure 2 is, for example, a wooden detached house, and an outer wall 3 is provided on the outer peripheral surface of the structure 2 to protect the outside of the structure 2 as shown in FIGS. Yes. A waist wall 4 is provided at the lower part of the outer wall 3, and the space between the waist wall 4 and the outer wall 3 is filled with mortar or the like. Thereby, when the seismic force is transmitted to the outer wall 3, the stress concentrates on the mortar portion, and the outer wall 3 is hardly damaged.

  Further, a packing 21 is provided so as to surround the outer periphery of the seismic isolation mat 13 and the second foundation 12. The packing 21 has a substantially plate shape and is formed of an elastic body. The lower end of the packing 21 is in contact with the upper surface of the first foundation 11. By providing the packing 21, the second foundation 12 and the seismic isolation mat 13 are insulated from the surrounding ground. For example, even when a rolling seismic force is generated, the packing 21 is To absorb the seismic force, it will be isolated.

As shown in FIG. 2A, when the second foundation 12 is a solid foundation, a packing 21 is provided on the outer surface of the rising portion 12 a and the outer surface of the seismic isolation mat 13. By comprising in this way, said 2nd foundation 12 and seismic isolation mat 13 and the surrounding ground will be insulated.
Further, as shown in FIG. 2B, when the second foundation 12 is a cloth foundation, the packing 21 is provided on the outer surface of the rising portion 12a, the outer surface of the footing 12c, and the outer surface of the seismic isolation mat 13. Is provided. By comprising in this way, said 2nd foundation 12 and seismic isolation mat 13 and the surrounding ground will be insulated.

  Another embodiment of the seismic isolation mat will be described. As shown in FIGS. 6 and 7, the seismic isolation mat 33 is composed of a plate-like member 33a and a protrusion 33b. Further, the plate-like member 33a of the seismic isolation mat 33 is formed in a substantially hexagonal shape in plan view. On each side of the hexagonal plate-like member 33a, a dovetail groove 33c or a dovetail handle 33d is provided as an engaging portion, and adjacent seismic isolation mats 33 can be connected to each other.

  Further, the protrusions 33b are provided in a distributed manner on the diagonal line of the hexagonal plate-like member 33a at equal intervals. By constituting in this way, it is possible to achieve seismic isolation simply by laying the seismic isolation mat 33, and the seismic isolation mat 33 can be installed without preparing a formwork as in the conventional foundation, so that the installation is facilitated. The seismic isolation mat 33 can be easily transported by removing the connected portion. Further, since the seismic isolation mat 33 can be combined and laid in various shapes, it can be laid according to the shape of the bottom surface of the structure 2. For this reason, the seismic isolation mat 33 is not laid in a useless portion, and the cost can be reduced.

Next, the seismic isolation structure will be described with reference to FIGS.
The seismic isolation mat 13 is in contact with the first base 11 at the tip of the protrusion 13b. When an earthquake occurs, the seismic force from the ground is directly transmitted to the first foundation 11, but the protrusion 13b of the seismic isolation mat 13 laid on the first foundation 11 absorbs the seismic force by its elasticity. The force is less likely to be transmitted to the part above the seismic isolation mat 13. As a result, the seismic force is hardly transmitted to the second foundation 12 and the structure 2 laid on the seismic isolation mat 13 and is thus isolated.

  Further, since the plate-like member 13a of the seismic isolation mat 13 is made of hard rubber and the protrusion 13b is also made of hard rubber, even when a longitudinal earthquake occurs, the elasticity of the protrusion 13b It becomes possible to absorb the vibration caused by the seismic force and make it difficult to transmit the seismic force to the second foundation 12 and the structure 2. Specifically, at the normal time, the protrusion 13 b and the plate-like member 13 a are compressed by the weight of the structure 2 and the second foundation 12. When a longitudinal earthquake occurs, the vibration is absorbed by the elastic force of the compressed protrusion 13b and the plate-like member 13a, so that the earthquake force is not easily transmitted to the second foundation 12 and the structure 2. Is.

  As described above, the seismic isolation mat 13 is formed of a plate member 13a having a substantially polygonal shape in plan view formed of an elastic body, and an elastic body protruding from at least one surface of the plate member 13a. And a plurality of protrusions 13b, 13b,. With this configuration, the seismic isolation effect can be obtained simply by laying the seismic isolation mat 13 and can be installed without preparing the lower formwork of the second foundation 12 as in the conventional foundation. Becomes easy. Moreover, since the seismic isolation mat 13 can be laid in various shapes by being combined, it can be laid according to the shape of the bottom surface of the structure 2. For this reason, it is not necessary to lay the seismic isolation mat 13 in a useless portion, and the cost can be reduced.

  Further, a dovetail groove 13c and a dovetail pattern 13d are provided to be connected to the plate-like member 13a adjacent to the plate-like member 13a. By comprising in this way, the said seismic isolation mat 13 can be easily conveyed by removing the connected part.

  The seismic isolation ground 1 using the seismic isolation mat 13 includes a first foundation 11 laid on the ground supporting the structure 2 and the seismic isolation mat 13 laid on the upper surface of the first foundation 11. In the base-isolated ground 1, a second foundation 12 for laying the structure 2 on the upper surface of the base-isolated mat 13 is laid.

  With this configuration, when an earthquake occurs, the seismic force from the ground is directly transmitted to the first foundation 11, but the seismic isolation mat 13 laid on the first foundation 11 generates the seismic force by its elasticity. Since it absorbs, the seismic force is not easily transmitted to the second foundation 12 and the structure 2 laid on the seismic isolation mat 13, and seismic isolation is possible. Further, even when a longitudinal earthquake occurs, it is possible to absorb the vibration due to the seismic force by the elasticity of the protrusion 13b of the seismic isolation mat 13.

  Further, a packing 21 is provided so as to surround the outer periphery of the seismic isolation mat 13 and the second foundation 12. By comprising in this way, between the 2nd foundation 12 and the seismic isolation mat 13, and the surrounding ground will be insulated, for example, even if it is a case where the seismic force of rolling occurs, the said packing 21 Will be isolated to absorb seismic force.

  In addition, as a structure of the seismic isolation ground 1 concerning a present Example, it is not limited to the structure mentioned above.

  That is, although the seismic isolation mat 13 according to the present embodiment has nine protrusions 13b, the number of protrusions 13b is not limited to this. By increasing the number of protrusions 13b, the load applied to one protrusion 13b is reduced. Therefore, the load applied to the protrusions can be adjusted by increasing or decreasing the number of protrusions 13b in accordance with the weight of the structure 2.

  Further, the shape of the projection 13b is not limited to a cylindrical shape, and may be configured in a truncated cone shape. In other words, the protrusion 13b can be configured to have a larger cross-sectional area as it approaches the tip. By comprising in this way, a contact surface with the 1st foundation 11 becomes large, and it becomes possible to bear a bigger load.

  Further, the protrusion 13b may be configured such that the cross-sectional area decreases as it approaches the tip. Moreover, it is also possible to comprise so that it may become on the side view parabola. By comprising in this way, the contact surface of the protrusion 13b of the seismic isolation mat 13 and the first foundation 11 becomes small, and the frictional force becomes small, so that sliding support becomes easy.

  Moreover, the engaging part which connects the said seismic isolation mat 13 with the adjacent seismic isolation mat 13 is not limited to a dovetail and an ant pattern. For example, it is possible to provide an overlapping portion and connect with a connecting pin or the like, or connect with another member. Further, the shape of the ant groove and the ant pattern is not limited. For example, it can be formed in a fan shape.

Moreover, the said structure 2 is not limited to an Example, It can be comprised by various building structures, such as wooden construction, masonry construction, concrete construction, or reinforced steel concrete construction. For example, by providing the second foundation 12 such as a two-dot chain line in FIG. 2A, it is possible to configure a building structure such as masonry, concrete, or reinforced steel concrete.
Moreover, the said structure 2 is not restricted to a house, For example, a factory, a plant, a storage tank, or a pipeline etc. may be sufficient.

The upper perspective view which shows the seismic isolation mat of the laying state which concerns on one Example of this invention. (A) Front partial sectional view showing the configuration of the base-isolated ground (b) Front partial sectional view showing the configuration of the base-isolated ground. A side view of the base-isolated ground. The bottom view of the seismic isolation mat concerning an Example. The lower perspective view which shows the seismic isolation mat of the laying state. The upper perspective view of the seismic isolation mat concerning other examples. The bottom view which shows the seismic isolation mat of the laying state.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Seismic isolation ground 2 Structure 3 Outer wall 11 1st foundation 12 2nd foundation 13 Seismic isolation mat 13a Plate-like member 13b Protrusion 13c Dovetail 13d Dovetail 21 Packing

That is, in claim 1, a plate-like member having a substantially square shape in plan view formed of an elastic body, and a lower surface of the plate-like member, which is in contact with the first foundation laid on the ground supporting the structure. A plate adjacent to the plate-like member, the plate-like member having a surface on which a second foundation made of concrete can be laid is provided on the upper surface. An engaging portion is provided for connection with the shaped member, and the plurality of protrusions are arranged on each square lattice point.

According to a second aspect of the present invention, a substantially hexagonal plate-like member in plan view formed of an elastic body and a lower surface of the plate-like member that protrudes from a surface that contacts a first foundation laid on the ground supporting the structure. A plurality of protrusions formed of an elastic body provided, and the plate-like member is provided with a surface on which a second foundation made of concrete can be laid on the upper surface, and a plate-like member adjacent to the plate-like member; An engaging portion to be connected is provided, and the plurality of protrusions are arranged in a hexagonal shape at regular intervals.

In Claim 3, It is the seismic isolation ground comprised from the 1st foundation laid in the ground which supports a structure, and the said seismic isolation mat laid in the upper surface of the said 1st foundation, Comprising: On the upper surface of the said seismic isolation mat A second foundation made of concrete for fixing the structure is laid, and the second foundation and the seismic isolation mat are integrated by hardening the concrete of the second foundation.

According to a fourth aspect of the present invention, packing is provided so as to surround the outer periphery of the seismic isolation mat and the second foundation, and the lower end of the packing is provided so as to be in contact with the upper surface of the first foundation.

In claim 1, it is possible to obtain the seismic isolation effect simply by laying the seismic isolation mat, and it is possible to install without preparing a formwork in the lower part of the foundation as in the conventional foundation, so that the installation becomes easy. Moreover, since the said seismic isolation mat is comprised in the square shape and can be laid in various shapes by combining, it becomes possible to lay according to the bottom face shape of a structure. For this reason, it is no longer necessary to lay seismic isolation mats in useless parts, and costs can be reduced. The seismic isolation mat can be easily transported by removing the connected portion. In addition, the engagement between the seismic isolation mats and the coupling between the seismic isolation mat and the second foundation are strong.

In claim 2, it is possible to obtain the seismic isolation effect simply by laying the seismic isolation mat, and it is possible to install without preparing the formwork at the lower part of the foundation as in the conventional foundation, so that the installation becomes easy. Moreover, since the said seismic isolation mat is comprised in hexagon shape and can be laid in various shapes by combining, it becomes possible to lay according to the bottom face shape of a structure. For this reason, it is no longer necessary to lay seismic isolation mats in useless parts, and costs can be reduced. The seismic isolation mat can be easily transported by removing the connected portion. In addition, the engagement between the seismic isolation mats and the coupling between the seismic isolation mat and the second foundation are strong.

In claim 3, when an earthquake occurs, the seismic force from the ground is directly transmitted to the first foundation, but the seismic isolation mat laid on the first foundation absorbs the seismic force due to its elasticity. Seismic force is not easily transmitted to the second foundation and structure laid on the seismic mat, and seismic isolation is possible. Further, even when a longitudinal earthquake occurs, vibration due to seismic force can be absorbed by the elasticity of the protrusions of the seismic isolation mat. In addition, piping such as water supply and drainage is installed in the space between the seismic isolation mat and the first foundation, so it is isolated. In addition, the engagement between the seismic isolation mats and the coupling between the seismic isolation mat and the second foundation are strong.

In claim 4, the second foundation and seismic isolation mat and the surrounding ground are insulated. For example, even if a rolling seismic force is generated, the packing absorbs the seismic force and is therefore exempted. It will be shaken.

That is, in Claim 1, it is the base isolation ground comprised from the 1st foundation laid in the ground which supports a structure, and the base isolation mat laid in the upper surface of the said 1st foundation,
The first foundation is laid on the entire floor area portion of the structure,
The seismic isolation mat is laid in accordance with the shape of the first foundation, and is formed of an elastic body on a plurality of plate-like members formed of an elastic body and a surface that contacts the first foundation of the plate-like member. A plurality of protrusions,
The plate-like member has a square shape in plan view, and is provided with an engaging portion that connects adjacent plate-like members on each side,
The plurality of protrusions are arranged in a lattice shape,
Laying a second foundation on the upper surface of the seismic isolation mat,
The second foundation is a solid foundation made of concrete, and the second foundation and the seismic isolation mat are integrated by hardening the concrete .

In claim 1, it is possible to obtain the seismic isolation effect simply by laying the seismic isolation mat, and it is possible to install without preparing a formwork in the lower part of the foundation as in the conventional foundation, so that the installation becomes easy. Moreover, since the said seismic isolation mat is comprised in the square shape and can be laid in various shapes by combining, it becomes possible to lay according to the floor area partial shape of a structure. For this reason, it is no longer necessary to lay seismic isolation mats in useless parts, and costs can be reduced. The seismic isolation mat can be easily transported by removing the connected portion. In addition, the engagement between the seismic isolation mats and the coupling between the seismic isolation mat and the second foundation are strong. Also, when an earthquake occurs, the seismic force from the ground is directly transmitted to the first foundation, but the seismic isolation mat laid on the first foundation absorbs the seismic force by its elasticity, so Seismic force is difficult to be transmitted to the second foundation and structure laid on the ground, making it possible to perform seismic isolation. Further, even when a longitudinal earthquake occurs, vibration due to seismic force can be absorbed by the elasticity of the protrusions of the seismic isolation mat. In addition, piping such as water supply and drainage is installed in the space between the seismic isolation mat and the first foundation, so it is isolated. In addition, the engagement between the seismic isolation mats and the coupling between the seismic isolation mat and the second foundation are strong.

Claims (4)

  A planar polygonal plate-like member formed of an elastic body and a plurality of protrusions formed of an elastic body protruding on at least one surface of the plate-like member. Seismic isolation mat.   An seismic isolation mat provided with an engaging portion connected to a plate-like member adjacent to the plate-like member.   A seismic isolation ground composed of a first foundation laid on the ground supporting the structure and the seismic isolation mat laid on the upper surface of the first foundation, the structure being fixed to the upper surface of the seismic isolation mat The base-isolated ground using the base-isolated mat according to claim 1 or 2, wherein a second foundation is laid. The seismic isolation ground using the seismic isolation mat according to claim 3, wherein packing is provided so as to surround the outer periphery of the seismic isolation mat and the second foundation.

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