JP2932970B2 - Existing building seismic isolation structuring method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of converting an existing building having a non-seismic isolation structure into a seismic isolation structure.

[0002]

2. Description of the Related Art When retrofitting an existing non-seismic structure to a seismic isolation structure using a seismic isolation device, the seismic isolation device must be installed at the position of the pillar. A jack is installed around the pillar at the position where the seismic isolation device is installed, and the column is cut by the height of the seismic isolation device and removed while the jack bears the load that the column bears. It is conceivable to repeat the work of installing the seismic isolation device on each pillar.

In the method of installing a seismic isolation device for each pillar, there is no rise in the upper structure separating the lower structure with the seismic isolation device interposed therebetween. It will be reduced. In addition, during construction, work is performed in a narrow space, so workability is poor, work efficiency is reduced, and the construction period is prolonged.

Further, since a seismic isolation device is installed for each column, a difference is easily generated in the amount of sinking of each seismic isolation device when a load is applied to the seismic isolation device, and it is difficult to adjust the horizontal accuracy of the upper structure.

[0005] The present invention proposes a method of seismic isolation structuring which solves the problems of the above method.

[0006]

According to the present invention, a pedestal having a jack for supporting the upper structure is installed under a beam of the upper structure, a column is cut while the entire upper structure is supported by the gantry, and the upper structure is jacked. After installing the seismic isolation device between the lower structure column and the upper structure column by raising the whole, lowering while supporting the upper structure eliminates the problem of installing the seismic isolation device for each column I do.

[0007] The pillar is cut while the entire upper structure is supported by the gantry, and the entire upper structure is lifted with a jack to install the seismic isolation device. It does not reduce the ceiling height at the bottom of the structure. Even when a new beam and slab is constructed on the lowermost layer of the superstructure, the decrease in ceiling height is suppressed to less than the beam height.

If the pillar is cut at the level including the beam in the lowermost leg of the upper structure, the upper structure is raised by the height of the seismic isolation device without modifying the upper structure separated from the lower structure. The construction is completed in the form. In this case, the beams are not connected to the tops of the pillars of the lower structure, so if it is necessary to ensure the rigidity of the lower structures, new beams are erected between the tops of the pillars of the lower structure.

If the pillar is cut at a level including a beam at the top of the uppermost layer of the lower structure, the beam is connected to the top of the column of the lower structure, but the beam is connected to the leg of the lowermost column of the upper structure. Because of this, a new beam is erected between the legs of the column of the superstructure.

At the time of construction, a work space is secured between the upper structure and the lower structure by raising the entire upper structure, so that the workability is improved. In addition, by raising the entire superstructure, installing the seismic isolation device, and then lowering it, the installation efficiency of the seismic isolation device is increased, and the construction period is shortened.

In addition, since the upper structure is lowered after all the seismic isolation devices are installed, it is possible to apply a load evenly to each seismic isolation device, and horizontal accuracy of the upper structure is ensured. Horizontal accuracy is always ensured during construction, so construction can be performed with existing buildings in use.

The rise of the entire upper structure makes it possible to construct a new frame between the upper structure and the lower structure. In this case, the pillar is cut at a level including the beam in the lowermost leg of the upper structure, and the entire upper structure is raised at least by the jack with the jack.

Thereafter, the seismic isolation device was installed on the lower structure column, and a beam continuous between the column and the leg was newly constructed below the existing upper structure column. rear,
The construction is completed by lowering while supporting the superstructure including the newly constructed columns and beams.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIGS. 1 to 3, the present invention divides an existing building into an upper structure 2 and a lower structure 3 by cutting off pillars. This is a method in which the seismic isolation device 1 is installed between the three to make the upper structure 2 a seismic isolation structure and the construction is completed as it is.

FIG. 1 shows the existing building and the cutting positions of the pillars. In the present invention, since no new frame is added to either the upper structure 2 or the lower structure, it is necessary to secure at least the rigidity of the upper structure 2. The pillar is cut at the level including the beam 22 at the lowermost leg of the upper structure 2, such as at the lower end level of the beam 22 of the upper structure 2, so that the beam 22 is connected to the column 21 of the upper structure 2. Is done.

Prior to cutting the columns, a gantry 5 having a jack 4 for supporting the upper structure 2 is installed under a beam 22 near a column 21 which is a part of the upper structure 2 where the seismic isolation device 1 is installed. Is done.

After the gantry 5 is installed, the pillars are cut while supporting the entire upper structure 2 with the gantry 5 and the upper structure 2 and the lower structure 3 are cut.
The existing building is divided into an upper structure 2 and a lower structure 3.

Subsequently, as shown in FIG. 2, the entire upper structure 2 is raised by the jack 4 by the height required for construction above the height of the seismic isolation device 1, and the columns 21 of the upper structure 2 and the lower structure 3 The seismic isolation device 1 is installed in the space between the pillars 31, and the
Connect to Thereafter, as shown in FIG. 3, the upper structure 2 is lowered while being supported by the gantry 5, the lower end of the column 21 of the upper structure 2 is connected to the seismic isolation device 1, and the construction is completed. In this method, the upper structure 2 is raised by the height of the seismic isolation device 1 to form a seismic isolation structure.

In the second aspect of the present invention, as shown in FIG. 4, in order to secure the rigidity of the lower structure 3, a beam 6 is newly provided between the tops of the columns 31 of the lower structure 3 in order to secure the rigidity of the lower structure 3. It is a method to complete construction by erection. If the rigidity of the lower structure 3 is insufficient with only the beam 6, a slab 7 is also constructed in addition to the beam 6.

In this invention, since the beam 6 or the beam 6 and the slab 7 are added to the substructure 3 according to the first aspect of the present invention, the cutting position of the column and the construction up to the installation of the seismic isolation device 1 are required. Same as the invention described in Item 1.

According to the third aspect of the present invention, as shown in FIG. 5, the existing building is divided at the position where the beam 32 is connected to the top of the column 31 of the lower structure 3, and the beam 6 is attached to the leg of the column 21 of the upper structure 2. Alternatively, a beam 6 and a slab 7 are added. Pillar 21 is the beam of substructure 3
The lower structure 3 is cut at a level that includes the beam 32 at the top of the uppermost layer, such as at the top level.

In the present invention, since the legs of the column 21 of the upper structure 2 are not connected to the beam, the seismic isolation device 1 is installed, and the seismic isolation device 1 is connected to the column 31 of the lower structure 3 while the upper structure 2 is connected. Pillar
The beam 6 or the beam 6 and the slab 7 are erected between the legs 21 and 21. After constructing the beam 6, or the beam 6 and the slab 7, lower it while supporting the upper structure 2, and connect the lower end of the column 21 of the upper structure 2 to the seismic isolation device 1 or lower while supporting the upper structure 2. After the lower end of the column 21 of the upper structure 2 is connected to the seismic isolation device 1, the construction is completed by building the beam 6, or the beam 6 and the slab 7.

According to a fourth aspect of the present invention, as shown in FIG. 6, a method of constructing a skeleton including one layer of columns 8 and beams 6 under the upper structure 2, and completing the upper structure 2 in a state where the upper structure 2 is further raised. It is. Also in the present invention, the slab 7 may be constructed at the time of constructing the skeleton.

The column is the same as the first aspect of the present invention.
The lowermost leg is cut at a level including the beam 21. After the column is cut, the entire upper structure 2 is raised at least one layer by the jack 4, the seismic isolation device 1 is installed on the column 31 of the lower structure 3, and connected to the column 31 of the lower structure 3.

Thereafter, a new column 8 is continuously constructed under the column 21 of the upper structure 2, and the beam 6 is inserted between the legs of the newly provided column 8.
Alternatively, after the beam 6 and the slab 7 are constructed, the beam is lowered while supporting the newly constructed upper structure 2 including the frame composed of the column 8 and the beam 6, and the lower end of the column 8 is connected to the seismic isolation device 1. Construction ends. In this invention, the beam 6 or the beam 6 and the slab 7 may be newly constructed between the tops of the columns 31, 31 of the lower structure 3 in the same manner as the second aspect of the invention.

[0026]

According to the present invention, a gantry having a jack for supporting the upper structure is installed under the beam of the upper structure, the pillar is cut while the entire upper structure is supported by the gantry, and the entire upper structure is raised by the jack, thereby lowering the lower structure. After installing the seismic isolation device between the pillars of the upper structure and the columns of the upper structure, the upper structure is lowered by supporting the upper structure and the upper structure is seismically isolated. And the ceiling height of the lowermost layer of the upper structure is not reduced. Even when a new beam and slab is constructed on the lowermost layer of the superstructure, the decrease in ceiling height is suppressed to less than the beam height.

If the column is cut at the level including the beam at the lowermost leg of the upper structure, the upper structure is raised by the height of the seismic isolation device without modifying the upper structure separated from the lower structure. Since the construction is completed, the upper structure can be easily made into a seismic isolation structure.

At the time of construction, since the entire upper structure is raised, a work space can be secured between the upper structure and the lower structure, and workability is improved. In addition, since the entire upper structure is raised and all the seismic isolation devices are installed and then lowered, the installation efficiency of the seismic isolation devices is good and the construction period is shortened.

In addition, since the upper structure is lowered after all the seismic isolation devices are installed, a load can be applied evenly to each seismic isolation device, and the horizontal accuracy of the upper structure is ensured. Horizontal accuracy is always ensured during construction, so construction can be performed with existing buildings in use.

Further, the rise of the entire upper structure makes it possible to construct a new frame between the upper structure and the lower structure.

[Brief description of the drawings]

FIG. 1 is an elevation view showing an existing building and its cutting position.

FIG. 2 is an elevation view showing a state where the upper structure is raised.

FIG. 3 is an elevation view showing a state where a seismic isolation device is installed.

FIG. 4 is an elevation view showing a state where a seismic isolation device is installed according to the second aspect of the invention.

FIG. 5 is an elevation view showing a state in which a seismic isolation device is installed according to the third aspect of the present invention.

FIG. 6 is an elevation view showing a state in which a seismic isolation device is installed according to the invention described in claim 4;

[Explanation of symbols]

1 ... seismic isolation device, 2 ... superstructure, 21 ... pillar, 22 ...
Beam, 3 ... Lower structure, 31 ... Column, 32 ... Beam, 4 ... Jack, 5 ... Stand, 6 ... Beam, 7 ... Slab, 8 ...
Pillar.

──────────────────────────────────────────────────続 き Continued on the front page (72) Kaoru Ueno, Inventor Kaoru 1-2-7 Motogasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd. (72) Inventor Kazuto Saito 1-2-7 Motomoto Akasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd. (72) Inventor Yukimasa Ogihara 1-2-7 Moto-Akasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd. (56) References JP-A-2-20767 (JP, A) JP-A-2 -104833 (JP, A) JP-A-62-121281 (JP, A) JP-A-2-70831 (JP, A) JP-A-62-69555 (JP, U) (58) Fields investigated (Int. . ⁶ , DB name) E04H 9/02 E04G 23/02

Claims (4)

(57) [Claims] 1. A method of dividing an existing building into an upper structure and a lower structure, and installing a seismic isolation device between the two structures to convert the upper structure into a seismic isolation structure. Install a frame with a jack to support, cut the pillar at the level including the beam on the lowermost leg of the upper structure while supporting the entire upper structure with the frame, raise the entire upper structure with the jack, A seismic isolation structuring method for an existing building in which a seismic isolation device is installed between the pillar and the pillar of the superstructure, and then lowered while supporting the superstructure. 2. A method for dividing an existing building into an upper structure and a lower structure, and installing a seismic isolation device between the two structures to convert the upper structure into a seismic isolation structure. Install a base with a jack to support, cut the pillar at the level including the beam on the lowermost leg of the upper structure while supporting the entire upper structure with the base, raise the entire upper structure with the jack, A seismic isolation structuring method for an existing building in which a seismic isolation device is installed between a column and a superstructure column, and then lowered while supporting the superstructure, while a beam is erected between the tops of the lower structure columns. 3. A method of dividing an existing building into an upper structure and a lower structure, and installing a seismic isolation device between the two structures to convert the upper structure into a seismic isolation structure. Install a gantry with a jack to support, cut the pillars at the level including the beam at the top of the uppermost layer of the lower structure while supporting the entire upper structure with the gantry, and raise the entire upper structure with the jack to raise the pillars of the lower structure After installing a seismic isolation device between the pillars of the superstructure and lowering it while supporting the superstructure, a method of seismic isolation of an existing building in which a beam is erected between the legs of the columns of the superstructure. 4. A method of dividing an existing building into an upper structure and a lower structure, and installing a seismic isolation device between the two structures to convert the upper structure into a seismic isolation structure. Install a gantry with a jack to support, cut the pillar at the level including the beam on the lowermost leg of the upper structure while supporting the entire upper structure with the gantry, and jack the entire upper structure at least one layer of the upper structure Raise and install the seismic isolation device on the pillars of the substructure.On the other hand, under the columns of the existing superstructure, add a column connected to the column of the superstructure and a beam to be installed between the legs of the column. After building, a seismic isolation structuring method for an existing building that is lowered while supporting the superstructure including the newly constructed columns and beams.