JP2010249225A - Construction method for structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the installation work load of a concrete form of a concrete part on the lowermost part of a structure to be base-isolated by a base-isolating layer. <P>SOLUTION: There is provided the construction method for the structure 1 supported on a leveled ground G through the base-isolating layer 10. The method includes a base-isolating layer forming process for forming the base-isolating layer 10 by spreading a plurality of block-shaped flexible base isolation bearing members 11 over the leveled ground G to be arranged in parallel, and a lowermost part forming process for forming the concrete part on the lowermost part of the structure 1 using the upper surface of the formed base-isolating layer 10 as the concrete form 30 and placing the concrete 40. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a method for constructing a structure such as a building that is seismically isolated by a seismic isolation layer.

  Conventionally, as shown in the side view of FIG. 9A, the building 101 is protected from an earthquake by interposing a base isolation layer 110 between the building 101 and the ground G. The seismic isolation layer 110 is configured by arranging a plurality of seismic isolation bearing members 111 such as a laminated rubber 111, a rolling bearing, and a sliding bearing in parallel. In this parallel arrangement, the plurality of seismic isolation bearing members 111 are generally scattered and arranged on the ground G (plan views of FIGS. 9A and 9B (BB arrows in FIG. 9A). View)).

JP 2005-248520 A

  However, when the concrete floor 103 that forms the lowermost part of the building 101 is formed on the spot in such a scattered arrangement, at least the region An between the seismic isolation bearing members 111 and 111 (that is, the seismic isolation bearing) It is a region An where the member 111 is not arranged, and a concrete formwork (not shown) is assembled on the hatched portion in FIG. 9B, and the concrete to be placed thereafter must be supported from below. The installation work of such a concrete formwork was very troublesome.

  The present invention has been made in view of the conventional problems as described above, and can reduce the installation work load of the concrete formwork of the concrete portion that forms the lowermost part of the structure to be seismically isolated by the seismic isolation layer. It aims at providing the construction method of a simple structure.

In order to achieve this object, the invention shown in claim 1
A method for constructing a structure supported on a leveling surface via a seismic isolation layer,
A base isolation layer forming step of forming the base isolation layer by arranging a plurality of block-shaped base isolation bearing members having flexibility on the leveling surface and arranging them in parallel;
Using the upper surface of the formed seismic isolation layer as a concrete mold, and forming a lowermost concrete portion of the structure by placing concrete, .
According to the first aspect of the present invention, since the seismic isolation bearing member is laid and arranged on the leveling surface, the upper surface of the seismic isolation bearing member can be used as a concrete formwork. As a result, the concrete formwork for forming the lowermost concrete portion of the structure can be simplified, and the installation work load is reduced.

Invention of Claim 2 is the construction method of the structure of Claim 1,
The shape of the seismic isolation bearing member is a rectangular parallelepiped having an upper surface with a predetermined height,
The seismic isolation bearing members that are adjacent to each other laterally in the seismic isolation layer are characterized in that their side surfaces are in close contact with each other over the entire surface.
According to the second aspect of the present invention, the gap between the seismic isolation bearing members can be minimized, and as a result, the above-described concrete formwork can be further simplified. Further, the lower surface of the lowermost concrete portion of the structure can be formed into a flat surface by the upper surface having the predetermined height, and the workability when forming the lowermost concrete portion on a solid foundation is excellent.

Invention of Claim 3 is the construction method of the structure of Claim 1 or 2, Comprising:
The seismic isolation bearing member has a plurality of slit portions formed along the vertical direction therein,
The slit portion is formed so as to reach the upper surface of the seismic isolation bearing member without reaching the lower surface of the seismic isolation bearing member,
In the lowermost formation step, the upper surface of the seismic isolation layer is covered with a liquid-impermeable coating member, and then concrete is placed on the coating member.
According to the third aspect of the present invention, since the horizontal rigidity of the seismic isolation bearing member is lowered by the slit portion, the seismic isolation bearing member is easily elastically deformed in the horizontal direction. Is surely horizontal isolated.

  In addition, since the top surface of the base isolation layer is covered with a liquid-impermeable coating member, concrete can be placed on the top surface of the base isolation layer (base isolation support member) while effectively preventing the flow of concrete into the slit. It becomes.

Invention of Claim 4 is the construction method of the structure of Claim 1 or 2, Comprising:
The seismic isolation bearing member has a plurality of slit portions formed along the vertical direction therein,
In the seismic isolation layer forming step, the seismic isolation bearing member is disposed on the ground surface so that the slit portion is not exposed on the upper surface of the seismic isolation bearing member,
In the lowermost part forming step, concrete is directly placed on the upper surface of the seismic isolation bearing member.
According to the invention described in claim 4, since the horizontal rigidity of the seismic isolation bearing member is lowered by the slit portion, the seismic isolation bearing member is easily elastically deformed in the horizontal direction. Things are reliably isolated from the horizontal.
Further, the seismic isolation bearing member is disposed so that the slit portion is not exposed on the upper surface of the seismic isolation bearing member. Therefore, the concrete can be directly placed on the upper surface of the base isolation layer (base isolation support member) while effectively preventing the inflow of the concrete into the slit portion. That is, the above-described covering member can be omitted.

Invention of Claim 5 is the construction method of the structure in any one of Claims 1 thru | or 4, Comprising:
The slit portion has a thickness greater than 0 mm and 1 mm or less.
According to the fifth aspect of the present invention, since the thickness of the slit portion is set to an arbitrary value within the above numerical range, the surfaces facing each other with the slit portion sandwiched are surely slid during the horizontal seismic isolation of the structure. . Thereby, the said seismic isolation bearing member can function also as a vibration damping device which attenuates the horizontal vibration of a structure.

The invention shown in claim 6 is the construction method of the structure according to claim 5,
The slit portion is formed by cutting with a blade member.
According to the sixth aspect of the present invention, since the slit portion is cut and formed by the blade member, the thickness of the slit portion can be surely kept within the numerical range of more than 0 mm and not more than 1 mm as described above.

The invention shown in claim 7 is the construction method of the structure according to any one of claims 1 to 4,
The slit portion is filled with a viscous material.
According to the seventh aspect of the present invention, during the horizontal seismic isolation of the structure, the horizontal vibration of the structure is attenuated by the shear resistance force of the viscous material in the slit portion. That is, the seismic isolation bearing member can also function as a vibration damping device that attenuates the horizontal vibration of the structure.

The invention shown in claim 8 is the construction method of the structure according to any one of claims 1 to 7,
The seismic isolation bearing member is made of a foamable resin,
The lowermost concrete portion is a solid foundation.
According to the eighth aspect of the invention, since the seismic isolation bearing member is made of an inexpensive foamable resin, the construction cost can be reduced. In addition, because it is a solid foundation, all the seismic isolation bearing members that are laid out can receive the weight of the structure evenly, suppressing local deformation of the seismic isolation bearing member, and the structure of the seismic isolation bearing member Soundness can be maintained for a long time.

  ADVANTAGE OF THE INVENTION According to this invention, the installation work load of the concrete formwork of the concrete part which makes the lowest part of the structure which should be seismically isolated by a seismic isolation layer is reduced.

FIG. 1A is a side view of a building 1 provided with a seismic isolation layer 10, and FIG. 1B is a cross-sectional view taken along line BB in FIG. 1A. 2A is a side view of the seismic isolation bearing member 11, FIG. 2B is a side view taken along the line BB in FIG. 2A, and FIG. 2C is a top view. 3A and 3B are explanatory views of the vibration damping action of the seismic isolation bearing member 11. 4A to 4E are explanatory diagrams of a method for constructing the building 1 having the seismic isolation layer 10. 5A is a side view of a first modified example of the seismic isolation bearing member 11, FIG. 5B is a side view taken along the line BB in FIG. 5A, and FIG. 5C is a top view. 6A is a side view of a second modified example of the seismic isolation bearing member 11, FIG. 6B is a side view taken along the line BB in FIG. 6A, and FIG. 6C is a top view. FIG. 7A is a side view of a third modified example of the seismic isolation bearing member 11, FIG. 7B is a side view taken along the line BB in FIG. 7A, and FIG. 7C is a top view. FIG. 8A is a side view of a fourth modified example of the seismic isolation support member 11, FIG. 8B is a side view taken along the line BB in FIG. 8A, and FIG. 8C is a top view. FIG. 9A is a side view of a building 101 provided with a conventional seismic isolation layer 100, and FIG. 9B is a BB arrow view in FIG. 9A.

=== This Embodiment ===
<<< About the seismic isolation member 11 of the seismic isolation layer 10 >>>
FIG. 1A shows a side view of a building 1 as an example of a structure having a seismic isolation layer 10. FIG. 1B shows a cross-sectional view taken along the line BB in FIG. 1A. In addition, in FIG. 1B, the below-mentioned slit part 13 which the seismic isolation support member 11 should have is abbreviate | omitted and shown.

  The seismic isolation layer 10 is interposed between the building 1 and the leveled ground G below it. And the building 1 is horizontally isolated from the vibration of the ground G such as an earthquake by the seismic isolation layer 10. That is, the seismic isolation layer 10 supports (supports) the weight of the building 1 while allowing horizontal relative movement between the building 1 and the ground G. In addition, as long as the above-mentioned leveled ground G (hereinafter also referred to as leveled ground G) is a leveled surface, the earth and sand may be in an exposed state, or abandoned concrete is cast on and covered. It may be in a broken state.

  The seismic isolation layer 10 is composed of a plurality of block-shaped seismic isolation bearing members 11, 11... Arranged in a region facing the lower surface 1 d of the building 1 in the leveling ground G. As the seismic isolation bearing member 11, a substantially rectangular parallelepiped shape having a side of 910 cm to 1820 cm made of foamable resin such as Styrofoam (trademark (The Dow Chemical Company / Dow Chemical Co., Ltd.): extruded polystyrene foam) is used. A member can be illustrated. In this example, these seismic isolation bearing members 11, 11... Are standard products having the same shape and having an upper surface with a predetermined height, and around each seismic isolation bearing member 11, there are four side surfaces 11 s. , 11s, 11s, 11s, other seismic isolation bearing members 11, 11, 11, 11 are disposed, and the side surfaces 11s, 11s facing each other are in close contact with each other.

  Therefore, the upper surface 11u of any seismic isolation bearing member 11 always faces any part of the lower surface 1d of the building 1, thereby forming the lithographic bottom of the building 1. The so-called solid foundation 3 is supported by the seismic isolation bearing members 11, 11. In other words, since all the seismic isolation bearing members 11, 11... Receive the weight of the building 1 evenly and evenly, local deformation of the seismic isolation bearing member 11 is suppressed, and each seismic isolation The structural soundness of the support member 11 can be maintained over a long period of time. Moreover, when the seismic isolation bearing member 11 exhibits the vibration damping action described later, the self-damping force of the seismic isolation layer 10 can be maximized by the laying arrangement.

  2A to 2C are detailed explanatory views of the seismic isolation bearing member 11. 2A is a side view, FIG. 2B is a side view taken along arrow BB in FIG. 2A, and FIG. 2C is a top view.

  The seismic isolation bearing member 11 has a plurality of slit portions 13, 13. These slit portions 13, 13... Are formed for the purpose of reducing the horizontal rigidity (shear rigidity) of the seismic isolation bearing member 11 and increasing the horizontal flexibility of the seismic isolation bearing member 11. As a result, in the event of an earthquake, the seismic isolation support member 11 is quickly deflected and deformed in the horizontal direction, and the input of seismic motion to the building 1 is reduced (see FIG. 3B).

Each slit portion 13 is formed in a straight line shape along the vertical direction. And in this example, the slit part 13 is formed at predetermined pitches B and D respectively in the vertical direction and the horizontal direction orthogonal to each other in the horizontal direction, and when the seismic isolation bearing member 11 is viewed in a horizontal section, The seismic isolation bearing member 11 is divided into a grid pattern as shown in FIG. 2C, that is, is divided into a plurality of rectangular parallelepiped column portions 15, 15,. Each slit portion 13 reaches the upper surface 11u of the seismic isolation support member 11, but does not reach the lower surface 11d. That is, the slit portion 13 is slit in a range 11r having a predetermined height upward from the lower surface 11d. The part 13 is not formed. Therefore, these pillar portions 15, 15... Are integrally connected to each other in the lower portion 11r.
And the seismic isolation bearing member 11 having such a slit portion 13 can also have an effect of attenuating the horizontal vibration of the building 1 in addition to the above-described seismic isolation effect of the building 1, and as a result, vibration of an oil damper or the like. The number of attenuation devices can be reduced.

  3A and 3B are explanatory diagrams of this vibration damping action. When the building 1 is horizontally oscillating under horizontal seismic isolation, the seismic isolation bearing member 11 is also elastically deformed in the horizontal direction as shown in FIG. 3B. That is, the upper surface 11u of the seismic isolation bearing member 11 is displaced in the horizontal direction relative to the lower surface 11d. Then, due to this displacement, the surfaces 15s, 15s facing each other across the slit portion 13 slide inside the seismic isolation bearing member 11, and the frictional force P acts as a damping force to attenuate the horizontal vibration. The

The magnitude of the frictional force P can be calculated, for example, by the following formula 1.
P = μ × N (1)
Here, μ in the above formula 1 is a dynamic friction coefficient of surfaces 15s and 15s (hereinafter also referred to as sliding surfaces) facing each other across the slit portion 13, and N is a vertical drag of the sliding surface 15s. N is calculated by the following formula 2.
N = (W / n) × (δ / H) × n
= W × δ / H (2)
Here, W in the above formula 2 is the weight of the building 1, H is the vertical length of the slit portion 13, and n is a column portion divided and formed in a lattice shape that the seismic isolation layer 10 comprises. Is a total number of 15, 15..., And δ is a horizontal deflection amount of the seismic isolation bearing member 11 (that is, the seismic isolation layer 10). Note that δ is calculated by the following equation 3.
δ = Q × H ³ / (3 × 3 × I × n) (3)
Here, Q in the above equation 3 is an assumed seismic force in the horizontal direction, E is a Young's modulus (= about 1000 N / cm ² ) of the seismic isolation member 11, and I is a cross section per column portion 15. Second moment. I in the horizontal direction (lateral direction) is calculated by the following equation 4.
^{I = B × D 2/12} ...... (4)
B and D in the above formula 4 are the length B of the vertical side and the length D of the horizontal side of the horizontal section of the column part 15, that is, the formation pitches B and D of the slit part 13 described above. is there.

  Therefore, for example, by assuming the assumed seismic force Q and the weight W of the building 1 as fixed values, the values of n, B, D, H, and μ are determined so as to satisfy the above formulas 1 to 4, thereby exempting them. Manufacturing specifications of the seismic support member 11 (that is, the seismic isolation layer 10) are determined.

  Here, desirably, the above-mentioned dynamic friction coefficient μ is within a range of 1.4 to 1.9. In this way, it becomes easy to ensure the frictional force P having a magnitude necessary for damping the horizontal vibration. In order to set such a numerical range, the roughness of the sliding surface 15s must be reasonably large. From that viewpoint, as a method of forming the slit portion 13 in the seismic isolation member 11 of the styrofoam, a method of cutting with a blade member equipped with a flat blade or a saw blade rather than a method of fusing with a hot wire such as a nichrome wire. This is desirable because the surface roughness of the fracture surface can be increased.

  Desirably, the thickness of the slit portion 13 is within a range of more than 0 mm and 1 mm or less. If it falls within this numerical range, the faces 15s, 15s facing each other across the slit portion 13 can be reliably brought into close contact with each other, and as a result, the frictional force P necessary for the attenuation of horizontal vibration can be reliably ensured. . Note that, in order to fall within such a numerical range, the cutting method using the blade member is preferable because the thickness of the slit portion 13 can be made thinner than the fusing method using the above-described heat ray.

<<< Construction Method of Building 1 with Seismic Isolation Layer 10 >>>
4A to 4E are explanatory diagrams of a method for constructing the building 1 including the above-described seismic isolation layer 10. In each figure, a side view is shown on the right side, and a top view is shown on the left side.

  First, as shown in FIG. 4A, the ground of the site of the building 1 is dug deeper by at least the height of the seismic isolation support member 11 than the surrounding ground, and the dug ground is leveled, The substantially leveling ground G is formed. In addition, as above-mentioned, abandoned concrete may be laid and it is good also as the horizontal leveling ground G.

  Next, as shown in FIG. 4B, the seismic isolation bearing member 11 is laid out over the region of the ground leveling G that faces the solid foundation 3 of the building 1 to be constructed. (Equivalent to the seismic isolation layer formation process). In addition, when the leveling ground G is made of abandoned concrete, an adhesive or the like may be applied in advance to a region where the seismic isolation bearing member 11 is spread, and the seismic isolation bearing member 11 may be bonded and fixed.

  Here, when laying down, other seismic isolation bearing members 11 are arranged around the seismic isolation bearing member 11 so as to face each of the four side surfaces 11s, and the side surfaces 11s, 11s facing each other It may be arranged so as to be in close contact over the entire surface. If arranged in this way, the gap between the seismic isolation bearing members 11, 11 adjacent to each other can be substantially eliminated, whereby the upper surface 11 u of the seismic isolation bearing member 11 is adjacent to the seismic isolation bearing member 11 adjacent thereto. Is continuous with the upper surface 11u. By repeatedly applying such an arrangement relationship to the side, the upper surfaces 11u, 11u,... Of all the seismic isolation bearing members 11, 11,. As a result, a seismic isolation layer 10 having a planar size corresponding to the solid foundation 3 formed by the cast-in-place concrete is formed thereafter, so that the upper surface 10u of the seismic isolation layer 10 is a concrete formwork for the solid foundation 3. Will be available as

  If it does so, as shown to FIG. 4C, the upper surface 10u of the seismic isolation layer 10 will be covered with the coating | coated member 20 over the whole surface. The purpose of this covering is to prevent the inflow of concrete into the slit portion 13 from now on. Therefore, the covering member 20 may be a liquid-impermeable member that can prevent the passage of liquid in the thickness direction. Further, as described above, since the seismic isolation bearing members 11 are laid with almost no gap between them, the total weight of the placed concrete is supported by the upper surface 11 u of the seismic isolation bearing member 11. . Therefore, the covering member 20 may not be a high-rigidity plate member, that is, a low-rigidity sheet-like member or a film-like member can be used. Here, a sheet-like member is used. Examples of the sheet-like member include a vinyl sheet and a rubber sheet. Incidentally, the covering member 20 is buried.

  Next, the plate-shaped concrete formwork 30 is installed along the entire circumference of the outer peripheral edge of the seismic isolation layer 10 so as to receive a lateral pressure of the concrete to be placed. Further, a bar arrangement is provided above the covering member 20 which is the upper surface 10 u of the seismic isolation layer 10. Then, the concrete 40 is cast and the concrete formwork 30 is removed after the concrete is hardened. Thereby, as shown to FIG. 4D, the foundation 3 which is the lowest part of the building 1 is formed (equivalent to the lowest part formation process).

  In addition, construction of the part 1a (refer FIG. 4E) of the building 1 above this is made | formed based on a normal construction procedure. For example, a concrete formwork for pillar formation or a concrete formwork for beam formation is assembled on the solid foundation 3, and after placing the bars in the concrete formwork, the concrete is placed in the same formwork and the pillar beam is placed. Repeatedly forming a floor form slab by forming a concrete formwork for floor slab formation above these column beams, placing the concrete in these concrete formwork, and then placing concrete in the formwork form As a result, the building 1 is built upward.

=== Modification ===
5A to 5C are explanatory views of a first modified example of the seismic isolation bearing member 11. 5A is a side view, FIG. 5B is a side view taken along arrow BB in FIG. 5A, and FIG. 5C is a top view.

  In the above-described embodiment (FIG. 2A), the slit portion 13 has reached the upper surface 11u of the seismic isolation support member 11 and has not reached the lower surface 11d, but in the first modification (FIG. 5A), conversely, The slit portion 13 reaches the lower surface 11d of the seismic isolation support member 11, and does not reach the upper surface 11u. That is, it can be said that the seismic isolation bearing member 11 of the first modified example is obtained by vertically inverting the seismic isolation bearing member 11 of the above-described embodiment. And according to the seismic isolation bearing member 11 of such a 1st modification, even if concrete is directly laid on the upper surface 11u of the seismic isolation bearing member 11, inflow of the slot into the slit part 13 is reliably prevented. Therefore, the covering member 20 that is essential in the above-described embodiment can be omitted, and the construction cost and the construction period can be shortened. That is, in the lowermost formation step of the construction method described above, if the seismic isolation bearing member 11 of the first modification is used, the concrete is directly hit against the upper surface 11u without covering the upper surface 11u with the covering member 20. Can be set up.

  6A to 6C are explanatory views of a second modification of the seismic isolation bearing member 11. 6A is a side view, FIG. 6B is a side view taken along the line BB in FIG. 6A, and FIG. 6C is a top view.

  In the second modified example, the slit portion 13 does not reach both the upper surface 11u and the lower surface 11d of the seismic isolation support member 11, that is, the slit portion 13 includes an upper end portion and a lower end portion of the seismic isolation support member 11. It is formed only in the portion between these except for. In other words, the slit portion 13 is not formed in a predetermined range portion below the upper surface 11u of the seismic isolation support member 11 and a predetermined range portion above the lower surface 11d. According to such a configuration, when the operator places the seismic isolation support member 11 on the leveling surface G, the slit portion 13 can be reliably disposed so as not to be exposed on the upper surface 11u. Thus, it is possible to prevent a trouble of inflowing into the slit portion 13 due to a mistake in the operator's top and bottom.

  Incidentally, as a method of making the slit portion 13 as in the second modified example, for example, by inserting the blade member sideways from the side surface of the seismic isolation bearing member 11, only the central portion in the vertical direction is cut and the upper end portion is cut. 2a, or after cutting the upper surface 11u of the seismic isolation support member 11 with a blade member or a heat ray to form the slit portion 13 as shown in FIG. For example, an adhesive may be applied to adhere a plate body having the same material and the same planar shape as the seismic isolation support member 11 to cover the upper surface 11u.

  7A to 7C are explanatory views of a third modification of the seismic isolation bearing member 11. 7A is a side view, FIG. 7B is a side view taken along the line BB in FIG. 7A, and FIG. 7C is a top view.

  In the above-described embodiment (FIG. 2A), the horizontal vibration damping action of the seismic isolation bearing member 11 was friction damping based on the frictional force P generated in the slit portion. In this third modification (FIG. 7A), It is different in that the horizontal vibration is attenuated using viscous damping, that is, the viscous resistance force generated in the slit portion 13.

  That is, the slit portion 13 is formed in a thickness range of 2 mm to 20 mm, which is slightly thicker than the above-described embodiment, and the slit portion 13 is filled with the viscous material 17. Therefore, when the seismic isolation bearing member 11 bends in the horizontal direction, the surfaces 15s, 15s facing each other of the slit portion 13 move relative to each other via the viscous material 17, and the shearing of the viscous material 17 at that time The resistance force acts as a damping force to attenuate the horizontal vibration of the building 1.

  Examples of the viscous material 17 include a high-viscosity gel-like polymer material, and specific examples thereof include oiles SA-P viscous material (trade name: Oiles Kogyo Co., Ltd.).

  By the way, although the formation range of the above-mentioned slit part 13 has reached the upper surface 11u of the seismic isolation support member 11 in this 3rd modification, as shown in the 4th modification of Drawing 8A thru / or 8C, a slit part 13 may be formed so as not to reach both the upper surface 11 u and the lower surface 11 d of the seismic isolation bearing member 11.

=== Other Embodiments ===
As mentioned above, although embodiment of this invention was described, this invention is not limited to this embodiment, The deformation | transformation as shown below is possible in the range which does not deviate from the summary.

  In the above-described embodiment, the styrofoam is exemplified as the material of the seismic isolation support member 11. However, any material can be used as long as the material is excellent in compression resistance and flexible so that the structure such as the building 1 can be seismically isolated. It is not limited to the above, that is, a material other than the foamable resin may be used.

  Furthermore, if the upper surface of these seismic isolation bearing members can be used as a concrete form by laying and arranging multiple seismic isolation bearing members, laminated rubber, rolling bearings, and sliding bearings can be used as seismic isolation bearing members. It may be used.

  In the above-described embodiment, the ground is illustrated as an example of the leveling ground G, but the present invention is not limited to this as long as it is a horizontal surface. For example, the concept of the leveling surface G includes the upper surface of a structural floor made of concrete arranged inside.

1 building (structure), 1a part, 1d bottom surface,
3 Solid foundation (the concrete part at the bottom of the structure),
10 Seismic isolation layer, 10u upper surface,
11 seismic isolation bearing member, 11d lower surface, 11r lower part (range),
11s side surface, 11u top surface,
13 slit part, 15 pillar part, 15s sliding surface (surface),
17 viscous material, 20 covering member, 22 seismic isolation bearing member 30 concrete formwork, 40 concrete,
G ground leveling (leveling), P friction force, Q assumed seismic force, W weight

Claims (8)

A method for constructing a structure supported on a leveling surface via a seismic isolation layer,
A base isolation layer forming step of forming the base isolation layer by arranging a plurality of block-shaped base isolation bearing members having flexibility on the leveling surface and arranging them in parallel;
Using the upper surface of the formed seismic isolation layer as a concrete mold, and forming a lowermost concrete portion of the structure by placing concrete, How to build a structure. A construction method for a structure according to claim 1,
The shape of the seismic isolation bearing member is a rectangular parallelepiped having an upper surface with a predetermined height,
In the seismic isolation layer, the seismic isolation bearing members that are adjacent to each other laterally have their side surfaces abutted in close contact over the entire surface. A construction method for a structure according to claim 1 or 2,
The seismic isolation bearing member has a plurality of slit portions formed along the vertical direction therein,
The slit portion is formed so as to reach the upper surface of the seismic isolation bearing member without reaching the lower surface of the seismic isolation bearing member,
In the lowermost formation step, after the upper surface of the seismic isolation layer is covered with a liquid-impermeable covering member, concrete is placed on the covering member. A construction method for a structure according to claim 1 or 2,
The seismic isolation bearing member has a plurality of slit portions formed along the vertical direction therein,
In the seismic isolation layer forming step, the seismic isolation bearing member is disposed on the ground surface so that the slit portion is not exposed on the upper surface of the seismic isolation bearing member,
In the lowest part forming step, concrete is directly placed on the upper surface of the seismic isolation bearing member. A construction method for a structure according to any one of claims 1 to 4,
The structure of the structure is characterized in that the slit portion is formed to have a thickness greater than 0 mm and 1 mm or less. A construction method for a structure according to claim 5,
The method of constructing a structure, wherein the slit portion is formed by cutting with a blade member. A construction method for a structure according to any one of claims 1 to 4,
A construction method of a structure, wherein the slit portion is filled with a viscous material. A structure construction method according to any one of claims 1 to 7,
The seismic isolation bearing member is made of a foamable resin,
The method for constructing a structure, wherein the lowermost concrete portion is a solid foundation.