Base isolation repair method of existing building

Abstract

To provide a base isolation repair method of an existing building that enables base isolation repair work to be carried out without interfering with use of an energy consuming device on an upper floor.SOLUTION: In a base isolation repair method of an existing building 1 which has an upper floor 2 on which energy consuming devices 10 are provided and a lower floor 3 on which existing energy supply facilities 11, 13 supplying energy to the energy consuming devices 10 are installed, the existing building 1 is repaired to have a base isolation structure. The base isolation repair method of the existing building 1 comprises: an energy supply facility installation process of installing new energy supply facilities 21, 22 supplying energy to the energy consuming devices 10 on a roof top 4 of the upper floor 2; a connection switching process of, after the energy supply facility installation process, disconnecting the energy consuming devices 10 from the existing energy supply facilities 11, 13 and connecting them to the new energy supply facilities 21, 22; and a base isolation device installation process of, after the connection switching process, performing construction work to install a base isolation device 16 between the lower floor 3 and the upper floor 2 on the lower floor 3.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a seismic isolation retrofit method for an existing building, which retrofits an existing building that does not have a seismic isolation structure into a seismic isolated building that has a seismic isolation structure. [Background technology]

[0002] A seismic isolation retrofit method is known for retrofitting existing buildings, such as hospitals, office buildings, hotels, and apartment buildings, that do not have seismic isolation structures by installing new seismic isolation devices to turn them into seismic isolation buildings with seismic isolation structures in order to increase their resistance to earthquakes.

[0003] For example, Patent Document 1 describes a seismic isolation retrofit method for an existing building in which, in the basement of an existing building, part of a pillar is cut while the space between the floor and ceiling is supported by hydraulic jacks and shoring, and a seismic isolation device is installed in the gap created by the cut part, thereby retrofitting the existing building into a seismically isolated building. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2017-53131 A Summary of the Invention [Problem to be solved by the invention]

[0005] In the above-mentioned conventional seismic isolation retrofit method for an existing building, the construction work for installing the seismic isolation devices is carried out on a lower floor such as a basement floor.

[0006] However, on lower floors such as the basement, energy supply equipment such as heat source equipment such as chillers and boilers that circulate liquids such as water and heat transfer media while controlling the temperature of the air conditioners (air conditioner equipment) installed on each upper floor, and electrical equipment that supplies electricity to each upper floor are installed, and when construction work is carried out to install the seismic isolation devices on the lower floors, it is necessary to stop the operation of these energy supply equipment. Therefore, there is a problem that energy consuming devices such as air conditioners and electrical equipment on each upper floor cannot be used during construction work to install the seismic isolation devices.

[0007] The present invention has been made in consideration of such problems, and its purpose is to provide a seismic isolation retrofitting method for an existing building that allows seismic isolation retrofitting work to be carried out without interfering with the use of energy consumption devices on upper floors. [Means for solving the problem]

[0008] The seismic isolation retrofit method for an existing building of the present invention is a seismic isolation retrofit method for an existing building, which retrofits an existing building having upper floors on which energy consuming devices are installed and lower floors on which existing energy supply equipment that supplies energy to the energy consuming devices is installed, into a seismic isolation structure, and is characterized by having an energy supply equipment installation process for installing new energy supply equipment on the roof of the upper floor that supplies energy to the energy consuming devices, a connection switching process for disconnecting the energy consuming devices from the existing energy supply equipment and connecting them to the new energy supply equipment after the energy supply equipment installation process, and a seismic isolation device installation process for performing construction work to install a seismic isolation device on the lower floor between the lower floor and the upper floor after the connection switching process.

[0009] In the above-mentioned configuration, the seismic isolation renovation method for an existing building of the present invention preferably further includes an energy supply equipment removal step of removing the existing energy supply equipment from the lower floor after the connection switching step and before the seismic isolation device installation step.

[0010] In the seismic isolation retrofit method for an existing building of the present invention configured as described above, it is preferable that the existing energy supply facility and the new energy supply facility are at least one of a heat source device and an electric facility, respectively. Effect of the Invention

[0011] According to the present invention, it is possible to provide a seismic isolation retrofitting method for an existing building that enables seismic isolation retrofitting work to be carried out without interfering with the use of energy consuming devices on upper floors. [Brief description of the drawings]

[0012] [Figure 1] 1 is a diagram showing an outline of the configuration of an existing building to which a seismic isolation retrofit method for an existing building according to one embodiment of the present invention is applied. [Diagram 2] FIG. 2 is a process diagram of the seismic isolation retrofit method for an existing building according to this embodiment. [Diagram 3] 1 is a diagram showing an outline of the configuration of an existing building after the energy supply equipment installation process is completed. FIG. [Figure 4] FIG. 13 is a diagram showing an outline of the configuration of an existing building after the connection switching process is completed. [Diagram 5] 1A and 1B are explanatory diagrams showing an example of a construction procedure in a seismic isolation device installation process. [Figure 6] 5(a) and 5(b) are explanatory diagrams showing an example of the procedure following those in FIG. 5(a) and 5(b) in the seismic isolation device installation process. [Figure 7] This is a diagram showing an outline of the configuration of an existing building after seismic isolation retrofitting work has been completed. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] Hereinafter, a seismic isolation retrofit method for an existing building according to one embodiment of the present invention will be described in detail with reference to the drawings.

[0014] An existing building 1 shown in FIG. 1 is a building to which the seismic isolation retrofitting method for an existing building according to this embodiment is applied, and is a non-seismically isolated building that is not equipped with a seismic isolation device.

[0015] The existing building 1 has an upper floor 2 and a lower floor 3. In this embodiment, the upper floor 2 is a portion having multiple floors from the first floor to the third floor above ground, and above the upper floor 2 is a rooftop 4. The lower floor 3 is a basement floor (first basement floor) and is configured to include a foundation portion supported on the ground 5. The existing building 1 may be made of reinforced concrete, but is not limited to this.

[0016] In this embodiment, the existing building 1 is a hospital (ward), and the upper floors 2 are used as the ward. Note that the existing building 1 is not limited to being a hospital, and may be used for other purposes such as an office building, a hotel, or an apartment building.

[0017] An air conditioner (air conditioner device) 10 serving as an energy consuming device is provided on each floor of the upper floors 2. The number of air conditioners 10 provided on each floor of the upper floors 2 can be changed in various ways.

[0018] Meanwhile, on the lower floor 3, which is the basement floor, an existing heat source device 11 is installed as an existing energy supply facility. The existing heat source device 11 is also called a refrigerator, and is connected to each of the air conditioners 10 provided on each floor via piping 12. The existing heat source device 11 can circulate liquid such as water or a heat medium between the air conditioners 10 while managing the liquid temperature. The air conditioners 10 can cool or heat each of the upper floors 2 by being supplied with energy (thermal energy) via the liquid sent from the existing heat source device 11.

[0019] In addition, existing electrical equipment 13 is installed on the lower floor 3, which is the basement floor, as an existing energy supply facility. The existing electrical equipment 13 can transform high-voltage electricity supplied from outside the existing building 1 to a predetermined voltage and distribute it to each floor of the upper floor 2. Although not shown in detail, the existing electrical equipment 13 may include a substation equipment also called a cubicle, a disconnector, a switchgear, a circuit breaker, a protective device, instruments, a capacitor, and the like. The existing electrical equipment 13 is connected to each of the air conditioners 10 provided on each floor of the upper floor 2 via wiring 14, and can supply the necessary power to each of the air conditioners 10. The existing electrical equipment 13 can also supply power via wiring 15 to various electrical equipment (not shown) that requires power, such as lighting, medical equipment, and elevators provided on each floor. Furthermore, the existing electrical equipment 13 can also supply power via wiring 15 to outlets (not shown) provided on each floor.

[0020] In this way, before carrying out the seismic isolation renovation method for an existing building in accordance with this embodiment, the existing building 1 is configured so that the upper floors 2 can be operated or used as a hospital or wards, with energy such as liquid and electricity being supplied to the air conditioning unit 10 and various electrical devices from the existing heat source unit 11 and existing electrical equipment 13 installed on the lower floors 3.

[0021] The seismic isolation renovation method for an existing building according to this embodiment is also called seismic isolation retrofit, and is a method for renovating the above-mentioned existing building 1 with a non-seismic isolation structure into a seismic isolation building with a seismic isolation structure.

[0022] As shown in FIG. 2, the seismic isolation retrofit method for an existing building according to this embodiment includes an energy supply facility installation step, a connection switching step, and a seismic isolation device installation step.

[0023] In the seismic isolation retrofit method for an existing building according to this embodiment, first, an energy supply equipment installation process is performed. In the energy supply equipment installation process, new energy supply equipment that supplies energy to energy consuming devices is installed on the roof 4 of the upper floor 2.

[0024] Specifically, as shown in FIG. 3, in the energy supply equipment installation process, a new heat source device 21 and new electrical equipment 22 are installed on the roof 4 of the upper floor 2 as new energy supply equipment that supplies energy such as liquid and electricity to the air conditioning device 10, which is an energy consumption device installed on the upper floor 2, and various electrical appliances, etc.

[0025] The new heat source device 21 to be installed on the rooftop 4 during the energy supply equipment installation process has the function of circulating liquids such as water and heat transfer media between the air conditioning device 10 while managing the liquid temperature, just like the existing heat source device 11.

[0026] In addition, the new electrical equipment 22 to be installed on the roof 4 during the energy supply equipment installation process has the function of transforming high-voltage electricity supplied from outside the existing building 1 to a specified voltage and distributing it to each floor of the upper floors 2, just like the existing electrical equipment 13.

[0027] The energy supply equipment installation process is carried out on the rooftop 4. During the energy supply equipment installation process, energy such as liquid and electricity is supplied to the air conditioner 10 and various electrical devices from the existing heat source device 11 and existing electrical equipment 13 provided on the lower floors 3, just as before the process begins. Therefore, the energy supply equipment installation process can be carried out while the existing building 1 is being operated or used as a hospital or a hospital ward.

[0028] After the energy supply facility installation process is completed, a connection changeover process is performed next, in which the energy consuming device is disconnected from the existing energy supply facility and connected to the new energy supply facility.

[0029] Specifically, as shown in Figure 4, the existing heat source device 11 installed on the lower floor 3 is disconnected from the piping 12, i.e., the air conditioner 10, and a new heat source device 21 installed on the rooftop 4 is connected to the piping 12, i.e., the air conditioner 10. In addition, the existing electrical equipment 13 installed on the lower floor 3 is disconnected from the wiring 14, 15, i.e., the air conditioner 10 and various electrical devices, and new electrical equipment 22 installed on the rooftop 4 is connected to the wiring 14, 15, i.e., the air conditioner 10 and various electrical devices.

[0030] Once the connection switching process is completed, energy such as liquid or electricity is supplied to the air conditioning device 10 and various electrical devices from the new heat source device 21 and new electrical equipment 22 installed on the rooftop 4 in the energy supply equipment installation process. This allows the existing building 1 to continue to be operated or used as a hospital or a hospital ward even after the connection switching process is completed.

[0031] After the connection switching process is completed, the seismic isolation device installation process is carried out. In the seismic isolation device installation process, construction is carried out to install seismic isolation devices between the lower floor 3 and the upper floor 2 on the lower floor 3.

[0032] In the seismic isolation device installation process, various construction methods can be used for the work of installing the seismic isolation devices. In this embodiment, in the seismic isolation device installation process, the seismic isolation devices are installed on multiple columns of the lower floor 3 by the column capital seismic isolation method.

[0033] Specifically, as shown in Figure 5(a), first, multiple support devices 7 such as hydraulic jacks and shoring are installed around the columns 6 of the lower floor 3 on which the existing heat source equipment 11 and existing electrical equipment 13 are installed, and the support devices 7 provide support between the floor 8 of the lower floor 2 and the ceiling 9 or the upper floor 2.

[0034] Next, as shown in Fig. 5(b), a part of the column 6 is cut and removed while being supported by the support device 7 between the floor 8 of the lower floor 2 and the ceiling 9 or the upper floor 2. As a result, the column 6 is separated into a lower part 6a supported by the floor 8 and an upper part 6b supported by the ceiling 9, and a gap 6c is provided between the lower part 6a and the upper part 6b.

[0035] Next, as shown in Fig. 6(a), a seismic isolation device 16 is installed in the gap 6c. The seismic isolation device 16 may have a configuration in which a seismic isolation laminated rubber 16b is disposed between a pair of flanges 16a. In this case, the lower flange 16a is supported on the upper end surface of the lower part 6a of the column 6, and the upper flange 16a is supported on the lower end surface of the upper part 6b of the column 6. The seismic isolation device 16 is not limited to the above configuration, and may have another configuration, such as a sliding bearing.

[0036] Once the seismic isolation device 16 is installed in the gap 6c, the multiple support devices 7 are removed, and the upper floor 2 is supported relative to the lower floor 2 via the seismic isolation device 16, as shown in FIG. 6(b).

[0037] The seismic isolation device installation process is completed by installing the seismic isolation devices 16 on all columns 6 on the lower floors 3 using the same procedure as described above.

[0038] In addition, in the seismic isolation device installation process, before or after cutting and removing part of the column 6, any associated work may be carried out as appropriate, such as installing a horizontal restraint brace (not shown) between the floor 8 and the ceiling 9 to reinforce the column 6 and cutting part of the wall in the same manner as the column 6.

[0039] 7, the seismic isolation device installation process, i.e., the seismic isolation retrofitting method for an existing building according to this embodiment, is completed by similarly installing the seismic isolation devices 16 on all columns 6 on the lower floors 3. When the seismic isolation retrofitting method for an existing building according to this embodiment is completed, the existing building 1 becomes a seismic isolation structure, i.e., a seismic isolated building, in which the upper floors 3 are supported by the lower floors 3 fixed to the ground 5 via multiple seismic isolation devices 16, thereby improving earthquake resistance.

[0040] Here, since the work of installing the seismic isolation devices 16 on the columns 6 in the seismic isolation device installation process is performed on the lower floors 3 where the existing heat source equipment 11 and existing electrical equipment 13 are installed, it is difficult to perform the seismic isolation device installation process while operating the existing heat source equipment 11 and existing electrical equipment 13. If, as in the conventional seismic isolation renovation method, the energy supply equipment (existing heat source equipment 11, existing electrical equipment 13) that supplies energy to the air conditioning equipment 10 and electrical equipment on the upper floors 2 is installed only on the lower floors 3, it is necessary to stop operation of the energy supply equipment when performing work to install the seismic isolation devices 16 on the lower floors 3, and during that time, the existing building 1 cannot be operated or used as a hospital or a hospital ward.

[0041] In contrast, in the seismic isolation retrofit method for an existing building according to this embodiment, the energy supply equipment installation process and the connection switching process are performed in advance before the seismic isolation device installation process, so that when the seismic isolation device installation process is performed, energy such as liquid or electricity can be supplied to the air conditioner 10 and various electrical devices on the upper floors 2 from the new heat source device 21 and the new electrical equipment 22 installed on the rooftop 4 in the energy supply equipment installation process. As a result, even if the operation of the existing heat source device 11 and the existing electrical equipment 13 is stopped in order to perform the work of installing the seismic isolation device 16 on the column 6 on the lower floors 3 in the seismic isolation device installation process, the existing building 1 can continue to be operated or used as a hospital or a hospital ward by the new heat source device 21 and the new electrical equipment 22 installed on the rooftop 4. In other words, the work of installing the seismic isolation device 16 on the lower floors 3 can be performed while the existing building 1 is operated or used as a hospital or a hospital ward.

[0042] In this way, in the seismic isolation retrofit method for an existing building according to this embodiment, the above-mentioned energy supply equipment installation process and connection switching process are carried out before the seismic isolation device installation process, so that seismic isolation retrofit work to install seismic isolation devices 16 between the lower floors 3 and upper floors 2 can be carried out without interfering with the use of energy consuming devices such as the air conditioning unit 10 and various electrical appliances on the upper floors 2.

[0043] Furthermore, in the seismic isolation retrofit method for an existing building according to this embodiment, as described above, the energy supply equipment installation process and the connection switching process can be carried out while the existing building 1 is being operated or used as a hospital or hospital ward, so that the seismic isolation retrofit can be carried out while the existing building 1 is being operated or used as a hospital or hospital ward throughout the entire seismic isolation retrofit process for the existing building 1.

[0044] The seismic isolation retrofit method for an existing building according to this embodiment may further include an energy supply equipment removal step of removing the existing energy supply equipment from the lower floor 3 after the connection switching step and before the seismic isolation device installation step. In other words, after the connection switching step and before the seismic isolation device installation step, both or either one of the existing heat source equipment 11 and the existing electrical equipment 13 may be removed from the lower floor 3.

[0045] In this embodiment, after the connection switching process and before the seismic isolation device installation process, the existing electrical equipment 13 is removed from the lower floor 3, and the existing heat source device 11 is left as is.

[0046] With this configuration, after the seismic isolation device installation process is completed, the existing heat source device 11 can be reconnected to the piping 12 and configured in conjunction with the new heat source device 21, so that the existing heat source device 11 or the new heat source device 21 can be used as a backup in the event of a breakdown, maintenance, update, etc.

[0047] In addition, with this configuration, the power for the entire upper floors 2 of the existing building 1 is supplied from the new electrical equipment 22 installed on the rooftop 4. Therefore, the new electrical equipment 22 including the cubicles is arranged on the seismic isolation side of the existing building 1, which can improve the seismic resistance of the electrical equipment 22 during an earthquake. Furthermore, since the work of installing the seismic isolation devices 16 on the columns 6 can be performed after removing the existing electrical equipment 13 from the lower floors 3, the work efficiency of the work can be improved and the construction period for the seismic isolation device installation process can be shortened.

[0048] The present invention is not limited to the above-described embodiment, and it goes without saying that various modifications can be made without departing from the spirit and scope of the present invention.

[0049] For example, the existing heat source device 11 or the new heat source device 21 is not limited to a refrigerator, and may be a boiler or the like. [Explanation of symbols]

[0050] 1 Existing building 2 Upper Floors 3 Lower Floor 4. Rooftop 5 ground 6 Pillars 6a Lower part 6b Upper part 6c Gap 7 Support device 8 Beds 9. Ceiling 10. Air conditioning equipment 11 Existing heat source equipment 12 Piping 13 Existing Electrical Equipment 14 Wiring 15 Wiring 16 Seismic isolation device 16a Flange 16b Seismic isolation laminated rubber 21 New Heat Source Device 22 New electrical equipment

Claims

1. A seismic isolation retrofit method for an existing building, which retrofits an existing building having an upper floor on which energy consuming devices are installed and a lower floor on which an existing energy supply facility that supplies energy to the energy consuming devices is installed, to a seismic isolation structure, comprising the steps of: an energy supply equipment installation process for installing new energy supply equipment on the roof of the upper floor to supply energy to the energy consumption device; a connection switching step of disconnecting the energy consuming device from the existing energy supply facility and connecting the energy consuming device to the new energy supply facility after the energy supply facility installation step; A seismic isolation retrofit method for an existing building, comprising: a seismic isolation device installation process, which comprises, after the connection switching process, carrying out construction work to install a seismic isolation device between the lower floor and the upper floor on the lower floor.

2. The seismic isolation retrofit method for an existing building as described in claim 1, further comprising an energy supply equipment removal step of removing the existing energy supply equipment from the lower floor after the connection switching step and before the seismic isolation device installation step.

3. The seismic isolation retrofit method for an existing building according to claim 1 or 2, wherein the existing energy supply facility and the new energy supply facility are at least one of a heat source device and an electrical facility, respectively.

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