JP2003172046A - Floor board for base isolation building and base isolation structuralization method of the existing building used thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To increase stability and safety of an upper structure in a rising state by controlling a rising quantity of the upper structure when the existing medium and low-rise building is structuralized in base isolation and when a floor board is newly constructed under the upper structure separated from a foundation. <P>SOLUTION: The floor board 5 supporting the upper structure 4 separated from the foundation of the building in a state supported by the base isolation device comprises a plurality of precast concrete slabs 1 arranged at least in one direction, tensile force is introduced to tension members 6 inserted in the direction at least arranged inside of the whole of the precast concrete slabs 1 to integrate the whole of the precast concrete slabs 1. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to a base plate for a base isolation building which is used for supporting a superstructure of a middle or low-rise base isolation building such as a house, and an existing building to be a base isolation structure using the same. The present invention relates to a seismic isolation structure method for existing buildings.

[0002]

2. Description of the Related Art When seismically isolated structure of an existing low-rise building such as a house is used, a seismic isolation device can be interposed between the foundation and the foundation or the like. Other than that, since the seismic isolation device will be installed at the position where the foundation is removed, a certain rigidity for supporting the seismic isolation device while supporting the superstructure under the superstructure above the foundation It is necessary to newly construct a floorboard having strength.

When constructing a floorboard, the upper structure is separated from the foundation, the entire upper structure is supported by a beam member for temporary support, and the beam member is lifted by a lifting device such as a jack. Assuming that the building will be constructed in-situ, as shown in Fig. 28, a space will be secured under the bottom of the superstructure for work such as formwork assembly, bar arrangement, seismic isolation device installation, and concrete placement. It is necessary to raise the superstructure high enough to do so.

In this case, the amount of lifting of the superstructure becomes large and the superstructure cannot be lifted by only the lifting device. Therefore, it is necessary to stack the gantry together with a certain amount of lifting, and therefore, the multi-stage structure is required. It becomes difficult to secure the stability of the superstructure by the stacked pedestals, and the danger increases.

Since stability and safety are reduced, it is difficult to work with the superstructure in use,
Until the completion of construction, you will be forced to leave the building.

In view of the above background, the present invention proposes a floor board capable of suppressing the amount of rise of an upper structure when an existing building is seismically isolated, and a seismic isolation structure method using the floor board.

[0007]

According to a first aspect of the present invention, a floor board supporting a superstructure of a building, which is separated from a foundation, is composed of a plurality of precast concrete boards arranged in parallel in at least one direction. When used in a method of seismically isolating an existing building, it eliminates the need to secure a working space below the bottom of the superstructure, which is the case when building a floorboard with cast-in-place concrete, and increases the amount of lift of the superstructure. Suppresses and enhances the stability and safety of the superstructure in the elevated state.

All precast concrete boards are integrated by the introduction of tension into a tension member inserted in at least the parallel direction inside the precast concrete boards, and are supported by the seismic isolation device in that state.

When the existing building is to be seismically isolated, the floor board is constructed by cast-in-place concrete because it supports the upper structure in a state of being floated from the top of the existing foundation when supported by the seismic isolation device. In this case, since it is necessary to secure a space required for formwork assembly, bar arrangement, and concrete placement above the floor board construction position, the amount of lift of the superstructure is a beam member that temporarily supports the superstructure when rising. In addition to the thickness of the floorboard and the working space, the size is about the same.

On the other hand, according to the floor board of claim 1, when used in a method for seismically isolating an existing building, precast concrete boards are connected to each other from the periphery of the existing building as claimed in claim 5. However, since it can be fed horizontally and integrated, there is no need to secure a special working space on the floor plate except for the space for inserting the beam member for temporary support. The size can be as large as the thickness of the floorboard added to the composition.

Since the lifting amount of the superstructure is reduced, it is not necessary to stack the gantry together with a certain amount of lifting, and the superstructure can be supported only by the lifting device until the floor plate is completed. The stability and safety of the superstructure in the closed state is improved. By ensuring the stability and safety of the superstructure, it is possible to perform work while the superstructure is in use, that is, without having to leave the building.

Since a plurality of precast concrete boards are integrated by tensioning tension members inserted in the parallel direction and fixing the ends to the precast concrete boards located at both ends, the plurality of precast concrete boards are integrated. Although it is possible to construct the floorboard from only,
A precast concrete plate of at least a part of all precast concrete plates integrated as described in claim 2 is used as a formwork, and a cast-in-place concrete is cast on a part of the precast concrete plate to complete a floorboard. You can also let it.

In the case of claim 2, since the precast concrete board can be used as a formwork, the assembly of the formwork for cast-in-place concrete can be light, so that even if it is applied to an existing building, the entire floorboard is cast-in-place. Compared with the case of constructing with a concrete structure, since the height of the working space required on the integrated precast concrete board can be reduced, the rise amount of the superstructure is suppressed. Is maintained.

In the second aspect, the floor board is composed of precast concrete board and cast-in-place concrete,
The rigidity of the floorboard can be increased as compared with the case where only the precast concrete board is used. In addition, in completing a floorboard of the same thickness, one precast concrete board is lighter in weight and easier to handle than when only a precast concrete board is used, so that workability during laying is improved.

Since supporting the upper structure on the floor plate may be necessary even when the building is newly constructed as a base-isolated building, the floor plates according to claims 1 and 2 are other than the case where the existing building is seismically isolated. Also applies to newly constructed seismic isolated buildings.

In a new seismic isolated building, the use of pre-cast concrete boards made in advance saves labor and simplifies the work at the site, resulting in a shorter construction period than the case of cast-in-place concrete construction. .

When the floorboards according to claims 1 and 2 are applied to a newly-constructed base-isolated building, there is no problem with raising the superstructure, as in the case where the existing building is seismically isolated, but the existing Similar to the case of applying to a building, for example, by installing a pedestal and a seismic isolation device for sending the precast concrete board to the outer peripheral position of the building and the horizontal projection plane respectively, while connecting the precast concrete board, Since the floor board can be completed while being sent to, it is possible to perform the construction without relying on heavy equipment such as a crane.

In a newly constructed seismic isolated building, since there is no restriction on the space above the floor board when it is constructed, it seems that there is no room to install a pedestal for sending the precast concrete board onto the site around the building. In this case, a method of completing the floorboard by simply placing it on a pedestal and seismic isolation device using a crane, etc., and then inserting tension materials to integrate all precast concrete boards may be adopted. is there.

The floorboards of claims 1 and 2 are supported by a seismic isolation device installed under the bottom surface of the floorboard as claimed in claim 3, and are placed around the floorboard as claimed in claim 4. , It may be supported by beams and girders supported by seismic isolation devices, and is selected according to the flat area and weight of the superstructure. In the latter case, seismic isolation devices will be installed under the beams and / or girders.

According to the method for seismically isolating an existing building using the floorboard according to any one of claims 1 to 4, the superstructure of the existing building is separated from the foundation as described in claim 5, and the superstructure is separated. In the raised state, from one side of the surroundings of the existing building to the opposite side under the superstructure, horizontally feed multiple precast concrete plates in one direction while connecting them to each other with tension members, and finish feeding Then, the tension member is tensioned to integrate all the precast concrete boards, thereby completing the floor board under the superstructure.

Thereafter, the floor plate is supported by the seismic isolation device installed below it, and the upper structure is lowered to support the floor plate, whereby the seismic isolation structure of the existing building is completed. The precast concrete plate may be fed in one direction from opposite sides to the center side.

A beam and a girder are arranged around the floor plate.
In the case of, for example, by installing or constructing girders or beams located on both sides in the direction orthogonal to the direction of feeding the precast concrete plate before feeding the precast concrete plate, the precast concrete plate is attached to the girder or beam. Since it is possible to feed it while supporting both ends of the precast concrete plate, it is possible to complete the floor plate without installing a pedestal for temporary support under the floor plate when the precast concrete plate is fed.

In this case, the beam or girder on the side for feeding the precast concrete plate is installed or constructed after the feeding of the precast concrete plate is finished, and the beam or girder on the side opposite thereto is installed before the feeding, or after the feeding is completed, or Be built.

According to the fifth aspect of the present invention, when the upper structure is lifted, the upper structure is supported mainly by the beam member which is erected in at least one direction under the upper structure, and both ends of the beam member are lifted by jacking up or lifting up. It is done by

When the beam member is installed in only one direction, the precast concrete plate is fed in the same direction as the installation direction of the beam member as described in claim 6, and as in claim 7. It may be fed in a direction orthogonal to the installation direction of the member.

In any case, the beam member is lifted in a state of being arranged on the bottom side of the superstructure, the floor plate is finally laid on the seismic isolation device, and when the floor plate is completed, the beam member is placed on the floor plate. Since it is located, the beam member is placed on the floorboard when the superstructure is lowered.

Therefore, except for the case where the beam member can be left on the floor plate as a structural member of the seismic isolated structure, in order to avoid the collision between the descending beam member and the floor plate, the position where the beam member is located is dealt with. A space for the beam member to enter is secured between the adjacent precast concrete plates.

When a gap is secured, the beam member is inserted into the gap and the beam member is integrated with the precast concrete plate by a tension material, or the beam member is once dropped through the gap and the beam member is recovered from the gap. After that, the precast concrete plates that are adjacent to each other with a gap therebetween are brought into close contact with each other by a tensile material.
When integrating a beam member with a precast concrete board, a precast concrete beam is used for the beam member.

Even in the case where the existing building is seismically isolated, the seismic isolation device may be provided within the horizontal projection plane of the superstructure according to claim 8 according to the scale of the superstructure such as the plane area and weight of the superstructure. It may be installed or may be installed outside the horizontal projection plane of the superstructure as described in claim 9. In the latter case, the floorboard is given a flat area larger than the area of the horizontal projection plane of the superstructure.

In the case of claim 8, the seismic isolation device is installed under the structural position of the floor plate prior to the feeding of the precast concrete plate, but the seismic isolation device is supported on the existing foundation or on the foundation and the seismic isolation device. However, since the precast concrete plate can be fed in, there is an advantage that it is not necessary to install a gantry scheduled for recovery for temporarily supporting the precast concrete plate in the horizontal projection plane of the upper structure.

In the case of claim 9, the precast concrete plate can be fed while being supported by the existing foundation, and it is necessary to temporarily install a pedestal for temporary support in the horizontal projection plane of the upper structure. In addition, since there is no need to newly construct a bottom plate or foundation for installing the seismic isolation device under the floor plate, there is an advantage that the work under the position where the floor plate is configured is simplified.

[0032]

DETAILED DESCRIPTION OF THE INVENTION The invention described in claim 1 is shown in FIGS.
As shown in 10, it is a floor board 5 that is composed of a plurality of precast concrete boards (hereinafter PC boards) 1 and that supports a superstructure 4 of a building that is separated from a foundation 3 while being supported by a seismic isolation device 2. .

A plurality of PC boards 1 are arranged side by side in at least one direction, for example, in the direction of the short side of the PC boards 1.
It is inserted in at least the direction parallel to each other, and the tension is introduced into the tension member 6 whose both ends are fixed to the PC plates 1 and 1 located at the ends, whereby they are integrated in a prestressed state. . In addition to the tension member 6 that integrates all the PC boards 1, each P board is used to increase the rigidity and strength of each PC board 1.
The tension member 6 may be arranged in advance in the direction orthogonal to the tension member 6 for each C plate 1.

1 to 5 show the case of claim 3 in which the floor plate 5 is supported by the seismic isolation device 2 installed under the bottom surface thereof.
10 shows that the floor plate 5 is supported by beams 7 and girders 8 arranged around the floor plate 5, and the beams 7 and girders 8 are supported by the seismic isolation device 2 installed under at least one of them. Indicate the case.

In each case, the foundation 3 having the frame 3a for installing the seismic isolation device 2 is constructed, and the PC board 1 is laid mainly after the seismic isolation device 2 is installed on the frame 3a.
Install seismic isolation device 2 after installation of all PC boards 1
The plate 1 may be collectively landed on the seismic isolation device 2.
The pedestal 3a may be constructed as a part of the foundation 3 or may be constructed separately from precast concrete or steel and integrated after the foundation 3 is constructed.

The seismic isolation device 2 uses not only a laminated rubber bearing as shown, but also a sliding bearing, a rolling bearing and the like, and an energy absorbing device for suppressing the shaking of the upper structure 4 with respect to the foundation 3 is also used.

It does not matter whether the foundation 3 is an independent foundation, a continuous foundation, or a solid foundation as shown in the figure, but stably supports the superstructure 4 via the seismic isolation device 2. The type is selected so that the rigidity required above can be secured. In the drawing, the root cutting bottom is filled with split stones 9 and the discarded concrete 10 is placed, and then the solid foundation 3 is constructed.

In both cases of FIGS. 1 to 5 and FIGS. 6 to 10, the long side of the rectangular PC board 1 is given a length corresponding to the span of the upper structure 4 and is adjacent in the short side direction. Then, the PC board 1 is laid, and all the PC boards 1 are inserted in the short side direction.
All the PC boards 1 are integrated by using Fig. 24- (a).
As shown in, the long side of the PC board 1 is set to a length obtained by dividing the span of the superstructure 4 into a plurality of parts, and a plurality of P boards are arranged in the span direction.
The C plate 1 may be laid and the PC plate 1 in that direction may be integrated by the tension member 6.

In the case of FIGS. 1 to 5, for example, after the seismic isolation device 2 is installed in the PC board 1, temporary pedestals are installed on both sides in the long side direction of the PC board 1, and the PC board 1 is shorted on the pedestal. It is laid by being hung up while adjoining in the side direction, or by feeding the PC board 1 from one side to the other side of the floor board 5 in the short side direction with both ends in the long side direction supported by the gantry. .

After the laying of the PC board 1 is completed, the tension member 6 is inserted in the short side direction of all the PC boards 1 and the tension material 6 is tensioned, and then both ends thereof are fixed to the PC boards 1 and 1 located at the ends. By doing so, all the PC boards 1 are integrated and the floor board 5 is completed. PC
When the plate 1 is fed, the tension member 6 can be inserted into the PC plate 1 at the time of feeding, and the adjacent PC plates 1 and 1 can be fed while being connected, so that both ends of the tension member 6 are connected to the PC plate after the installation is completed. The integration of all the PC boards 1 is completed only by fixing it to 1. After the floor board 5 is completed, the PC board 1 located on the seismic isolation device 2 and the seismic isolation device 2 are joined.

When the long side of the PC board 1 is set to a length obtained by dividing the span of the upper structure 4 into a plurality of pieces, the tension member 6 is inserted in the short side direction after the entire PC board 1 has been laid and the tension is increased. At the same time, the tension member 6 is inserted in the direction of the long side and tension is performed. In addition to PC steel and steel such as rebar,
Fiber reinforced materials are used.

As shown in FIG. 4, a sheath 1a for inserting a tension member 6 is embedded in the PC plate 1, and finally the seismic isolation device 2 on the bottom surface of the PC plate 1 located on the seismic isolation device 2 is inserted. As shown in FIG. 5- (b), an insert 1b or the like to be joined to the upper flange of the seismic isolation device 2 or the like is embedded at a position corresponding to.

Between the end faces of the adjacent PC plates 1 and 1 in order to prevent the end faces from being damaged by the tension member 6 when integrated, FIG.
As shown in FIG. 3, a joint is formed, and before the tension member 6 is tensioned, the joint is filled with a filler 11 such as non-shrinkable mortar.

6 to 10 show that seismic isolation devices 2 are installed at four corners of the outer periphery of the superstructure 4, and precast concrete beams 7 and girders 8 are arranged between the adjacent seismic isolation devices 2 and 2. ,
Alternatively, the case where both ends of the girder 8 are joined to the seismic isolation device 2 is shown. The beams 7 and girders 8 may be constructed of cast-in-place concrete.

In the drawing, since both ends of the girder 8 are joined to the seismic isolation device 2, the beam 7 is installed between both ends of the girders 8 and 8, and the beam 7 is attached to the girders 8 on both sides using the tension member 6. 8 is connected to both ends of the beam 7, but in the case of connecting both ends of the beam 7 to the seismic isolation device 2, the girder 8 is installed between both ends of the beams 7 and 7, and the beams 7 and 7 are attached by the tension member 6.
To be joined to.

Further, in the drawing, in order to suppress the bending of the girder 8 having a length corresponding to the long side of the floor plate 5 and to increase the rigidity of the floor plate 5, the tension member 6 is also inserted in the longitudinal direction of the girder 8 itself. ,is nervous. All the PC boards 1 are inserted in the direction of their short sides, and both ends penetrate the beams 7, 7 and are integrated by a tension member 6 fixed to them.

In FIG. 9, each PC board 1 is supported by the receiving portions 8a formed on the girders 8, 8 at both ends in the long side direction thereof. 1
May be similarly supported by the beams 7, 7. In these cases, the PC board 1 is supported by the girder 8 or the girder 7 and the girder 8 through a filler 11 such as mortar, metal, rubber or other protective member in order to prevent damage to the concrete such as the girder 8 and the PC. It

As in the case of FIGS. 1 to 5, the PC board 1 is suspended between the previously installed girders 8 and 8 while adjoining the PC board 1 in the short side direction so that the girders 8 and 8 are hung. By supporting, or with both ends in the long side direction supported by the girders 8, 8, P from the one side in the long side direction of the floor plate 5 to the other side
It is laid by feeding the C plate 1.

After laying all the PC boards 1, the tension member 6 is inserted in the short side direction of all the PC boards 1 and the tension material 6 is tensioned, and both ends thereof are fixed to the beams 7 and 7 located at the ends. As a result, all the PC boards 1 are integrated and the floor board 5 is completed.

When the PC boards 1 are fed in, the adjacent PC boards 1, 1 can be fed while being connected by the tension members 6. Therefore, after all the PC boards 1 have been laid, the beams 7 on the fed-in side are beamed 8, 8. The whole of the PC board 1 is completed only by installing it between them and fixing both ends of the tension member 6 to the beams 7, 7. The beam 7 on the side opposite to the sent-in side is installed before or after the PC board 1 is sent in.

In FIG. 9 and FIG. 10, which are sectional views taken along line xx and yy of FIG. 6, the integrated whole PC board 1, the beam 7 and the girder 8 are shown.
Placed concrete 12 on site
The floor board of claim 2 is shown, which constitutes the floor board 5 that secures the integrity with the board 1. PC board 1 and cast-in-place concrete 12
The integrity with the above is ensured by a reinforcing member protruding from the upper surface of the PC board 1 or a shear connector such as a dowel.

The invention according to claim 5 separates the superstructure 4 of the existing building from the foundation 3, and raises the superstructure 4, and the superstructure 4 is placed under the superstructure 4 under any one of claims 1 to 4. This is a method of constructing the floor board 5 of No. 3 and making the upper structure 4 of the existing building seismic isolation structure.

The floorboards 5 are horizontally fed from one side to the opposite side of the surroundings of the existing building in one direction while connecting the plurality of PC boards 1 to each other by the tension members 6 and all the PC boards fed in. It is built under the superstructure 4 by integrating the 1 by tensioning the tension members 6.

The upper structure 4 is lifted by supporting the upper structure 4 on a beam member 13 which is erected under the upper structure 4 in at least one direction, and lifting both ends of the beam member 13 by jacking up or the like. .

The PC board 1 is installed in the same direction as the installation direction of the beam member 13.
11 to 21 for explaining the construction procedure of the method of claim 8 in which the seismic isolation device 2 is installed in the horizontal projection plane of the upper structure 4 to make the existing building seismic isolated by the method of claim 6. To do.

FIG. 11 shows a state before construction in which the base 14 of the existing building is tightly connected to the existing foundation 3 by anchor bolts. In this case, the base 14 and the part of the large pulling 15 and above become the superstructure 4, and the base 14 and the large pull 15 can be separated from the foundation 3, but this is not always necessary, and the separating position is determined according to the form of the existing building. To be

First, as shown in FIGS. 12 and 22- (a), the base is
An insertion hole 3b for inserting the beam member 13 underneath 14 is opened in the foundation 3, and after cutting the anchor bolts that fix the base 14 to the foundation 3, the beam member 13 is inserted into the insertion hole 3b to form the base. A beam member 13 is inserted under 14 and a large pull 15, and lifting devices 16 such as jacks are installed at both ends of the beam member 13.

As the beam member 13, a steel frame beam such as H-shaped steel or I-shaped steel or a precast concrete beam such as I-shaped or T-shaped beam is used, and the beam member 13 is used in the span direction of the superstructure 4 or in the girder direction, or Inserted in both directions, the beam members 13 are arranged in the width direction at a sufficient distance from each other as shown in FIG. 24 to support the superstructure 4.

When the seismic isolation device 2 is installed in the horizontal projection plane of the upper structure 4, the seismic isolation device 2 is placed under the floor plate 5, so that the foundation 3 is formed with the insertion hole 3b and the upper portion. Below the bottom surface of the structure 4, an opening for access for installing the seismic isolation device 2 is formed. The loading and unloading of materials and equipment accompanying the installation of the seismic isolation device 2 is performed through the openings.

When the foundation 3 is left to secure the stability of the seismic isolation device 2 after the seismic isolation structure of the upper structure 4 or to use the foundation 3 as a fail-safe, the insertion hole 3b and the opening cause an influence. In this case, the insertion hole 3b and the opening are closed after the construction is completed.

After the beam members 13 are inserted, as shown in FIGS. 13 and 22- (b), the PC board 1 can be laid under the bottom surface of the superstructure 4 while maintaining the horizontal state of all the beam members 13. Height, beam member
Work is performed to lift 13 and install seismic isolation device 2 under the bottom of superstructure 4. If there is a possibility that the beam member 13 will bend during lifting, a tension member such as PC steel will be attached to the beam member 13 or it will be passed through and tension will be applied to the beam member 13 in an upward direction. Is done.

In FIG. 14, a pedestal for installing the seismic isolation device 2
When constructing or installing 17, the self-leveling concrete 18 is constructed by placing the concrete on the ground surface surrounded by the bidirectional foundation 3 and placing concrete in order to expose the horizontal plane of the pedestal 17. However, the self-leveling concrete 18 does not necessarily have to be constructed if the horizontal plane can be provided only by the mount 17. In the case of FIG. 14, since the self-leveling concrete 18 is surrounded and constrained by the bidirectional foundations 3 and 3, there is an advantage that the stability of the pedestal 17 and the seismic isolation device 2 thereon is enhanced during an earthquake.

When constructing the self-leveling concrete 18, subsequently, as shown in FIG. 15, the self-leveling concrete 18 is constructed and the pedestal 17 is constructed integrally thereon. Alternatively, a precast concrete or steel frame 17 is installed on the self-leveling concrete 18, and is integrated with the self-leveling concrete 18 by fastening anchor bolts or other means. afterwards,
As shown in FIG. 16, the seismic isolation device 2 is installed on the pedestal 17.

Here, as shown in FIG. 17, an insertion stand for sending the PC board 1 to either side around the existing building.
Sliding of a tetrafluoroethylene sheet or the like for smoothly sending out the PC board 1 on the upper surface of the insertion stand 19 that supports the PC board 1 when the PC board 1 is sent out and the top end surface of the foundation 3 Install the material 23 or supporting materials such as rollers and bearings. When sending out the PC board 1, the seismic isolation device 2 is attached to the PC board 1
If it can be used to support the seismic isolation device 2, a sliding member 23 and a supporting member are also installed on the seismic isolation device 2.

After that, as shown in FIGS. 17 and 18, while sliding on the insertion stand 19 and the foundation 3, a plurality of PC boards 1 are pulled in one direction toward the side facing the insertion stand 19. 6 and feed horizontally while connecting with each other.

As shown by the white arrow in FIG. 24- (a), P
When the C plate 1 is fed in the same direction as the erection direction of the beam member 13, avoiding the collision between the beam member 13 and the PC plate 1 when lowering the superstructure 4 until the beam member 13 fits in the insertion hole 3b of the foundation 3. Since it is not possible to use a single PC board 1 continuous in the direction orthogonal to the installation direction of the beam member 13, it is not possible to use a plurality of P plates in the direction orthogonal to the installation direction of the beam member 13.
Beam member of the portion where the C plate 1 is arranged and the beam member 13 is located
Fig. 22- between the PC boards 1 and 1 adjacent to each other in the direction orthogonal to 13
As shown in (c), the gap 20 into which the beam member 13 is inserted is secured.

The gap 20 is closed by a filler such as non-shrinkable mortar, or a compressive force is applied to the PC plate 1 when the tension is applied to the tension member 6 so that the adjacent PC plates 1 and 1 are brought into close contact with each other. Get off. When the gap 20 is closed by filling with a filling material, shearing force is transmitted between the PC boards 1, 1 by, for example, projecting a shear connector on the opposing end surfaces of the PC boards 1, 1.

When the PC board 1 is sent out in the direction orthogonal to the erection direction of the beam member 13 as shown by the outlined arrow in FIG. 24- (b), one continuous sheet in the erection direction of the beam member 13 is used. Although the PC board 1 can be used, in this case as well, a gap 20 into which the beam member 13 is inserted is secured between the adjacent PC boards 1 and 1 at the portion where the beam member 13 is located.

In the case of FIG. 24- (a), not only all the PC boards 1 adjacent in the feeding direction of the PC board 1 are integrated by the tension members 6, but also all the P boards adjacent in the direction orthogonal thereto are integrated.
The C plate 1 is also integrated by the tension member 6. In the case of (b), it suffices that all the PC boards 1 adjacent to each other in the feeding direction of the PC board 1 are integrated by the tension members 6.

In any case, it is possible to arrange a large number of beam members 13 in parallel in a direction orthogonal to the erection direction and to use them by tightly connecting them to the base 14 and floor plate 5 of the superstructure 4 after the superstructure 4 descends. When it is possible to leave the beam member 13 on the floor plate 5 as a structural member of a seismic isolated building, it is not always necessary to leave a gap.

Except when the beam member 13 is left as a structural member, in the case of a steel frame beam, it is recovered after the upper structure 4 is lowered. In the case of a precast concrete beam, it may be collected after the upper structure 4 is lowered or may be integrated with the PC boards 1 and 1. When the beam member 13 is collected, as described above, the gap 20 secured between the adjacent PC plates 1 and 1 is closed by the filling of the filler or the close contact of the PC plates 1 and 1.

When the beam member 13 is a precast concrete beam and is integrated with the PC boards 1 and 1, the upper end level of the beam member 13 is aligned with the upper end level of the PC board 1 as shown in FIG. The tension member 6 inserted through the PC board 1 penetrates in the width direction of the beam member 13 and becomes a part of the floor board 5 by being integrated with the PC board 1. In this case, a sheath is previously embedded in the beam member 13 at the position where the tension member 6 is inserted. Also PC
A filling material 11 is filled between the end surface of the plate 1 and the side surface of the beam member 13 in order to prevent damage to both concretes.

As shown in FIG. 19, after the feeding of all the PC boards 1 is completed, all the PC boards 1 are integrated by the tension members 6, and at the same time, the insertion stand 19, the insertion stand 19 and the foundation 3 are placed. Collect the sliding materials 23 and supporting materials of the
Support. At this time, the floor plate 5 is floated from the top end of the foundation 3 due to the recovery of the sliding material 23 and the supporting material on the foundation 3, and is placed in a state insulated from the foundation 3.

When the floor board 5 is supported by the seismic isolation device 2 by collecting the sliding material 23 and the bearing material from the foundation 3, the floor board 5
In order to float the bottom of the base from the top of the foundation 3, seismic isolation device 2
The level of the top of the seismic isolation device 2 is the level of the top of the seismic isolation device 2 when the level of the top of the base 3 is located above the level of the top of the foundation 3, and the level of the top of the slide 23 and the supporting material when the base 2 is installed. The height of the pedestal 17 and the height of the seismic isolation device 2 so that they are located above the edge level,
Also, the height of the sliding member 23 and the supporting member is set.

When the sliding member 23 and the supporting member are installed on the seismic isolation device 2 and the base 3 and the seismic isolation device 2 are used for sending out the PC board 1, the sliding member 23 on the seismic isolation device 2 is used. The height of the etc. is set smaller than the height of the sliding member 23 etc. on the foundation 3.

Then, as shown in FIG. 20, the beam member 13 is lowered and the upper structure 4 is landed on the floor plate 5.

After landing of the superstructure 4, as shown in FIG. 21, the beam member 13 is collected together with the lifting device 16, or the beam member 13 of the precast concrete beam when it is integrated with the PC board 1 is left. Only the heavy device 16 is collected, and the extra length portion of the beam member 13 protruding from the floor plate 5 is cut.

Further, as shown by the arrow in FIG. 24, tension is introduced into the tension member 6 to prestress the PC board 1 to integrate all the PC boards 1, and the end portion of the tension material 6 is connected to the end of the floor board 5. It is fixed to the PC boards 1 and 1 located at.

Thereafter, the base 14 and the large pull 15 of the upper structure 4 are tightly connected to the PC board 1 to secure the integrity of the upper structure 4 and the floor board 5, and the construction is completed.

Since the existing foundation 3 is released from the role of supporting the superstructure 4, it is dismantled and removed if unnecessary, but the self-leveling concrete 18 by the foundation 3 is removed.
If the seismic isolation device 2 is used as a fail-safe in case of emergency, such as when the seismic isolation device 2 loses its horizontal or vertical support ability, it remains.

The insertion hole 3b and the opening formed in the foundation 3 may be left as they are, but when the foundation 3 is used for restraint of the self-leveling concrete 18 or when it is used as a fail safe, the insertion hole 3b and the like of the foundation 3 are formed. If it affects the strength, it is blocked with mortar or concrete.

25 to 27 show a construction procedure in the case where the seismic isolation device 2 is installed outside the horizontal projection plane of the upper structure 4 to make the existing building a seismic isolation structure. In this case, the plane area of the floor plate 5 is larger than the area of the horizontal projection plane of the upper structure 4.

In this case, since it is not necessary to construct the self-leveling concrete 18 on the ground surrounded by the existing foundation 3, after the superstructure 4 is lifted in FIG. 13, the insertion frame is inserted as shown in FIG. 19 is installed, and the slide 19 for insertion and the slide 23 on the foundation 3 and the slides on the bearings are slid while the slide 19 for insertion 19
The plurality of PC boards 1 are horizontally fed while being connected to each other by tension members 6 in a direction toward the side opposite to, while a foundation 21 and a pedestal 22 for supporting the seismic isolation device 2 are newly added to the outer periphery of the existing building. While building, the seismic isolation device 2 is installed on the pedestal 22.

After the completion of sending out all the PC boards 1, FIG.
As shown in FIG. 3, the base 19 for insertion, the sliding member 23 on the base 19 for insertion, and the supporting material on the foundation 3 are collected to support the floor plate 5 on the seismic isolation device 2. The PC board 1 is floated from the top end of the foundation 3 by the recovery of the sliding material 23 and the supporting material from the foundation 3, and is placed in a state of being insulated from the foundation 3.

Then, as shown in FIG. 27, the beam member 13 is lowered and the upper structure 4 is landed on the floor plate 5.

Subsequently, the beam member 13 is recovered together with the lifting device 16, or only the lifting device 16 is recovered while leaving the beam member 13 of the precast concrete beam. Further, tension is introduced into the tension member 6 to integrate all the PC plates 1 so that the ends of the tension member 6 are fixed to the PC plates 1 and 1 located at the ends of the floor plate 5, and on the seismic isolation device 2. The PC board 1 located is joined to the seismic isolation device 2.

After that, the base 14 and the large pull 15 of the upper structure 4 are tightly connected to the PC board 1 to secure the integrity of the upper structure 4 and the floor board 5, and the construction is completed. Insertion hole formed in the foundation 3
3b and the opening are covered with mortar or concrete if necessary.

In this case as well, the existing foundation 3 is released from the role of supporting the upper structure 4 and therefore may be disassembled or removed, but it is left if it can be used as a fail safe.

[0089]

According to the first aspect of the present invention, since the floor board for supporting the superstructure is composed of a plurality of precast concrete boards, when the floor board is used in a method for seismically isolating an existing building, the floor board is constructed of cast-in-place concrete. It is not necessary to secure a working space under the bottom surface of the upper structure as much as in the case of, and the amount of rise of the upper structure is suppressed, and the stability and safety of the upper structure in the raised state can be improved.

By ensuring the stability and safety of the superstructure, it becomes possible to perform the work of seismic isolation structure while the superstructure is in use.

In claim 2, at least a part of the precast concrete plates integrated with each other is used as a formwork, and the cast-in-place concrete is placed on the part of the precast concrete plates to complete the floorboard. Therefore, the rigidity of the floor board can be increased.

Further, in completing a floorboard of the same thickness, the precast concrete board is lighter than the case where only the precast concrete board is used, so that the workability during laying is improved.

According to the present invention, since the beams and girders are arranged around the floor plate, the precast concrete plate can be laid by feeding the opposite girders or beams while supporting both ends of the precast concrete plate. The floorboard can be completed without installing a pedestal for temporary support under the floorboard when the board is fed.

In claim 5, the upper structure of the existing building is separated from the foundation, and in a state where the upper structure is raised, a plurality of precast pieces are cast in one direction from one side of the existing building to the opposite side. Since the concrete boards are horizontally fed while being connected to each other and all the precast concrete boards are integrated to complete the floor board, it is not necessary to secure a working space under the bottom surface of the superstructure as in claim 1, and the superstructure is not required. It is possible to carry out the work of seismic isolation structure while keeping the superstructure stable and safe in the ascended state, while suppressing the amount of rise of the superstructure.

According to claim 8, since the seismic isolation device is installed in the horizontal projection plane of the superstructure, it is possible to feed the precast concrete plate into the existing foundation or while supporting it with the foundation and the seismic isolation device. It is not necessary to install a special member for supporting the precast concrete plate in the horizontal projection plane of the structure.

According to the ninth aspect, since the seismic isolation device is installed outside the horizontal projection plane of the superstructure, it is possible to feed the precast concrete plate while supporting it on the existing foundation. There is no need to install a pedestal for support, and there is no need to build a new foundation for installing the seismic isolation device under the floor plate, which simplifies the work under the floor plate configuration position.

[Brief description of drawings]

FIG. 1 is a plan view showing a configuration example of a floor plate according to a third aspect.

FIG. 2 is an elevational view of FIG.

FIG. 3 is a side view of FIG.

FIG. 4 is a partially enlarged view of FIG.

5 (a) is a plan view showing another example of the floorboard according to claim 3, and FIG. 5 (b) is an elevation view of FIG. 5 (a).

FIG. 6 is a plan view showing a configuration example of a floor plate according to claim 4;

FIG. 7 is an elevational view of FIG.

FIG. 8 is a side view of FIG. 7.

9 is a sectional view taken along line xx of FIG.

10 is a cross-sectional view taken along line yy of FIG.

FIG. 11 is an elevational view showing a state before the construction of the method of claim 8 is started.

FIG. 12 is an elevational view showing a state in which a beam member and a lifting device are installed.

FIG. 13 is an elevation view showing a state when the upper structure is raised.

FIG. 14 is an elevational view showing how a self-leveling concrete is constructed.

FIG. 15 is an elevation view showing a state in which a pedestal for a seismic isolation device is constructed.

FIG. 16 is an elevational view showing a state in which a seismic isolation device is installed on a frame.

FIG. 17 is an elevational view showing a state when the feeding of the precast concrete plate is started.

FIG. 18 is an elevational view showing a state of feeding a precast concrete board.

FIG. 19 is an elevational view showing a state when the feeding of all the precast concrete boards is completed.

FIG. 20 is an elevation view showing a state in which the upper structure is landed on the floor board.

FIG. 21 is an elevational view showing a state when the beam member and the lifting device are collected.

22A is a perspective view showing a state where the beam member is inserted, FIG. 22B is a perspective view showing a state when the beam member is lifted, and FIG. 22C is a state when the beam member is collected. It is a perspective view showing the situation.

FIG. 23 is a cross-sectional view showing a state where a beam member made of precast concrete is used as a constituent material of a floorboard and integrated with the precast concrete plate.

[Fig. 24] Fig. 24 (a) is a plan view showing the relationship between the precast concrete plate and the beam member when the precast concrete plate is fed in the same direction as the beam member erection direction, and Fig. 24 (b) is orthogonal to the beam member erection direction. It is a top view showing the relation between a precast concrete board and a beam member when sending a precast concrete board in the direction.

FIG. 25 is an elevational view showing a state when a precast concrete plate is being fed in the method of claim 9.

FIG. 26 is an elevational view showing a state when the feeding of all the precast concrete boards is completed.

FIG. 27 is an elevation view showing a state in which the upper structure is landed on the floor board.

FIG. 28 is an elevational view showing a state at the time of construction when the floorboard is constructed by cast-in-place concrete construction.

[Explanation of symbols]

1 …… Precast concrete board, 1a …… Sheath, 1b
…… Insert, 2 …… Seismic isolation device, 3 …… Foundation, 3a ……
Frame, 3b ... Insertion hole, 4 ... Superstructure, 5 ... Floor plate, 6
...... Tensile material, 7 ... Beam, 8 ... Girder, 8a ... Receiving part, 9 ...
… Splitting stones, 10 …… Abandoned concrete, 11 …… Filling material, 12
…… In-place concrete, 13 …… Beam members, 14 …… Sill, 15 …… Large pulling, 16 …… Hoisting equipment, 17 …… Stand, 18 ・ ・ ・
… Self-leveling concrete, 19 …… Insert mount,
20 …… Gap, 21 …… Foundation, 22 …… Stand, 23 …… Slip material.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Junichi Nakai             4-2 Kita-37, Nishi Kita-ku, Sapporo-shi, Hokkaido             No. 6 Mansion Bridge No. 604 F-term (reference) 2E176 AA09 BB28

Claims (9)

[Claims] 1. A building, which is supported by a seismic isolation device,
A floor board that supports a superstructure that separates from the foundation, and is composed of a plurality of precast concrete boards that are arranged side by side in at least one direction, and all precast concrete boards are tension members that are inserted in at least the parallel direction inside them. A floor plate for seismic isolation buildings in which tension has been introduced into the unit to integrate it. 2. The floor board for seismic isolation building according to claim 1, wherein the cast-in-place concrete is cast on at least a part of the integrated precast concrete boards. 3. The seismic isolated building floor board according to claim 1, wherein the floor board is supported by a seismic isolation device installed below the bottom surface of the floor board. 4. The floor plate is supported by a beam and a girder disposed around the floor plate, and the beam and the girder are supported by a seismic isolation device installed under at least one of them. The floor plate for seismic isolation building described in 2. 5. A method for seismically isolating an upper structure of an existing building by using the floor plate for a seismic isolation building according to claim 1, wherein the upper structure of the existing building is separated from a foundation. Then, while the superstructure is raised, under the superstructure, from one side of the surrounding of the existing building to the opposite side, horizontally feed multiple precast concrete plates in one direction while connecting them to each other. , All the precast concrete boards that have been sent in are integrated to complete the floorboard under the superstructure, and after supporting the floorboard by the seismic isolation device installed below it, lower the superstructure and support it on the floorboard Seismic isolation structure method for existing buildings. 6. A precast in the same direction as the erection direction of the beam member by supporting the superstructure on a beam member erected in one direction under the superstructure, lifting both ends of the beam member to raise the upper structure. The seismic isolation structure forming method for an existing building according to claim 5, wherein a concrete plate is sent. 7. An upper structure is supported by a beam member that is erected in one direction under the upper structure, and both ends of the beam member are lifted to raise the upper structure, in a direction orthogonal to the installation direction of the beam member. The seismic isolation structure forming method for an existing building according to claim 5, wherein a precast concrete plate is fed. 8. The seismic isolation structure forming method for an existing building according to claim 5, wherein the seismic isolation device is installed in a horizontal projection plane of the upper structure. 9. The existing building according to claim 5, wherein the plane area of the floorboard is larger than the area of the horizontal projection plane of the superstructure, and the seismic isolation device is installed outside the horizontal projection plane of the superstructure. Seismic isolation structure method.