JP5409095B2 - Building construction method - Google Patents

Description

  The present invention relates to a building construction method. Specifically, the present invention relates to a building construction method for constructing a new building at the same position as an existing building.

Conventionally, rebuilding of a building is performed due to aging of the building, change of usage, and the like (see Patent Document 1). In this rebuilding work, a tenant's temporary move destination is secured, the tenant is moved to the move destination immediately before the start of the rebuilding work, and after the rebuilding work is completed, the tenant is again built in the newly built building. Move. During the construction period, the tenant will work at the new location.
However, the tenant's business must be stopped before the construction is started, and the tenant is relocated twice, which increases the burden on the tenant side accompanying the relocation.

In order to solve these problems, a building construction method for constructing a new building while using an existing building has been proposed (see Patent Documents 2 and 3).
In these building construction methods, a first structure is newly constructed adjacent to or penetrating an existing building, and the second structure is supported on the existing building by supporting the first structure. Build a new building. Next, the existing building is completely dismantled, and then a third structure portion is newly built in the space where the existing building existed.
According to these proposals, it is not necessary to stop the work of the tenant even if the construction is started, and it is not necessary to secure a temporary relocation destination of the tenant, so the burden on the tenant side associated with the relocation can be reduced. .

Japanese Patent Laid-Open No. 11-30038 JP 2003-120049 A JP 2007-9642 A

  However, in Patent Documents 1 to 3 described above, after the existing building is completely dismantled, the structure is newly built in the space where the existing building existed. Since the first structure portion thus formed must support all the loads of the second structure portion above the first structure portion, there is a problem in that the cost increases in both construction and structure.

  An object of this invention is to provide the building construction method which can reduce cost, when rebuilding a building.

The invention according to claim 1 is a building construction method for constructing a new building at the same position as an existing building, wherein the new building is divided into a lower structure portion, a horizontal structure portion, and an upper structure portion in order from the bottom. A vertical structure portion provided on the side surfaces of these three structure portions and extending in the vertical direction, and constructing the vertical structure portion along the side surfaces of the existing building and covering the existing building constructs a horizontal structure, the to the horizontal structure, the existing building, the lower structure portion, and the and the Ru provided equipment for supplying energy to the upper structure portion step, wherein the upper structure portion a horizontal structure A process of constructing a lower part on the part and a process of constructing the lower structure part in the dismantled space in parallel while dismantling the existing building from the upper part. .

According to this invention, an upper structure part is constructed | assembled in an order from a lower layer, and the tenant of an existing building is moved to the constructed upper structure part in an order from an upper layer. Then, since the existing building becomes vacant in order from the upper layer, it is demolished in order from this vacant layer. Therefore, since the existing building can be used even if the rebuilding work is started, it is not necessary to provide a temporary tenant relocation destination, and the burden on the tenant side accompanying the relocation can be reduced.
In addition, while dismantling the existing buildings in order from the top, the lower structure was built in order in the space where the existing buildings existed. Therefore, when constructing the lower structure portion, a part of the existing building that has not been demolished can be used as a support work, so that the cost can be reduced.

  In addition, tenants can be easily relocated, making it easy to transfer materials discharged from existing buildings, such as fixtures, fixtures, and equipment, to new buildings. Therefore, it is possible to greatly reduce the industrial waste discharged from the construction site and reduce the environmental load.

  In addition, by constructing the structural part on the existing building while leaving a part of the existing building, it can be used for temporary support of the structural part to newly construct the existing building.

  When constructing a new building while using an existing building, it is necessary to consider switching of the equipment system. However, the above Patent Documents 1 to 3 show only a structural rebuilding method. There is no disclosure regarding system switching.

  In the present invention, facility equipment for supplying energy to the existing building, the lower structure portion, and the upper structure portion is provided in the horizontal structure portion. Therefore, the horizontal structure part is constructed in advance, and the equipment system is switched by supplying energy such as electricity, gas, and water from the equipment of this horizontal structure part to existing buildings and newly constructed structure parts. You can continue to use the existing building while performing smoothly.

In this invention, it is preferable that the said vertical structure part is equipped with a vertical movement means and water supply / drainage equipment .

Here, the vertical movement means is, for example, an elevator or a staircase.
The water supply / drainage facility is, for example, a toilet or a hot water supply facility.

According to this invention, the vertical moving means and the water supply / drainage facility are provided in the vertical structure portion. Therefore, although the construction labor of a vertical structure part increases, since this vertical structure part is built ahead, the construction period of a lower structure part and an upper structure part can be shortened.
In addition, the tenant can be relocated more easily and the relocation cost can be further reduced because the elevator can be easily relocated to the upper structure simply by moving from the existing building in the vertical direction.

  According to the present invention, since an existing building can be used even if rebuilding work is started, there is no need to provide a temporary tenant relocation destination, and the burden on the tenant side accompanying relocation can be reduced. In addition, while dismantling the existing buildings in order from the top, the lower structure was built in order in the space where the existing buildings existed. Therefore, when constructing the lower structure portion, a part of the existing building that has not been demolished can be used as a support work, so that the cost can be reduced.

It is an elevation view of the existing building which concerns on one Embodiment of this invention. It is a top view and an elevation view of a new building according to the embodiment. It is a top view which shows an example of the equipment core which concerns on the said embodiment. It is the top view and elevation (the 1) for demonstrating the procedure which builds the new building which concerns on the said embodiment. It is the top view and elevation (the 2) for demonstrating the procedure which builds the new building which concerns on the said embodiment. It is sectional drawing of the part connected to the existing building of the equipment core of the new building which concerns on the said embodiment. It is the top view and elevation (the 3) for demonstrating the procedure which builds the new building which concerns on the said embodiment. It is the top view and elevation (the 4) for demonstrating the procedure which builds the new building which concerns on the said embodiment. It is sectional drawing for demonstrating the specific procedure which demolishes the existing building which concerns on the said embodiment. It is sectional drawing for demonstrating the specific procedure which constructs the beam and floor of the new building which concern on the said embodiment. It is the top view and elevation (5) for demonstrating the procedure which builds the new building which concerns on the said embodiment. It is a top view which shows arrangement | positioning of the equipment core which concerns on the modification of this invention.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
In the present invention, an existing building 10 is dismantled and a new building 30 is constructed at the same position as the existing building 10.

FIG. 1 is an elevation view of an existing building 10.
The existing building 10 has a rectangular shape in plan view, and has a first basement floor and four floors above the ground. The existing building 10 includes an existing foundation 11 and an existing structure 12 provided thereon.

The existing foundation 11 includes a plurality of piles 111, footings 112, foundation beams 113, and the like. The existing foundation 11 is provided with a spring tank.
The existing structural unit 12 is composed of five floors from the first basement and the first to fourth floors above the ground.

Facility equipment 121 is provided on the first basement floor of the existing building 10.
On the roof floor of the existing building 10, facility equipment 122 such as a cubicle or a cooling tower is provided.

FIG. 2 is a plan view and an elevation view of the new building 30.
The new building 30 has one basement floor and 11 floors above ground. The new building 30 includes a foundation 31, a lower structure portion 32 provided on the foundation 31, an equipment floor 33 as a horizontal structure portion provided on the lower structure portion 32, and the equipment floor 33. An upper structure portion 34 provided on the upper structure portion 35, and the lower structure portion 32, the equipment floor 33, and an equipment core 35 as a vertical structure portion provided on one side surface of the upper structure portion 34 and extending in the vertical direction; Is provided.
The lower structure part 32 is constructed at a position where the existing building 10 was present, and the equipment floor 33 is constructed so as to cover the existing building 10.

  In addition to the existing foundation 11 of the existing building 10, the foundation 31 includes a pile 311 provided around the foundation 31 and a rectangular frame-shaped foundation beam 312 connecting the piles 311 to each other.

  The lower structure part 32 is an office zone, and is composed of five floors from the first floor to the fifth floor. The floor height of each floor is the same as the floor height of each floor of the existing building 10. However, the present invention is not limited thereto, and the floor height of each floor of the lower structure portion 32 may be different from that of the existing building 10.

The upper structure 34 is an office zone and is composed of five floors from the seventh floor to the eleventh floor.
The equipment floor 33 corresponds to the sixth floor, and various equipment are installed on the equipment floor 33.
The newly built building 30 is provided with two sub-shafts 331 extending vertically from the first floor to the eleventh floor. The piping and wiring of the equipment on the equipment floor 33 cover the special usage such as 24-hour correspondence of the lower structure portion 32 and the upper structure portion 34 in addition to the main equipment piping and wiring. Through to each floor.

FIG. 3 is a plan view showing an example of the equipment core 35.
The equipment core 35 includes an emergency staircase 351 as two vertical movement means, a high-rise elevator 352 as two vertical movement means, a low-rise elevator 353 as two vertical movement means, an elevator hall 354, and a water supply / drainage equipment. A toilet 355, a hot water supply room 356 as a water supply / drainage facility, and the like. The facility core 35 on the first floor is provided with a disaster prevention center. The equipment core 35 may be provided with an emergency elevator.

The high-rise elevator 352 is a type in which a machine room is provided on an elevator shaft.
The low-rise elevator 353 is a type having no machine room.
Two passages 357 are provided on the existing building 10 side of the equipment core 35 (see FIG. 6).

  Returning to FIG. 2, the new building 30 described above includes a structural frame 40 that supports the axial force of the new building 30 and serves as an earthquake-resistant element. The structure frame 40 includes four vertical frames 41 extending substantially vertically from the foundation 31 to the upper end of the new building 30, and four vertical frames 42 extending substantially vertically from the foundation 31 to a height in the middle of the new building 30. , And 11 horizontal frames 43 that horizontally connect the vertical frames 41 and 42 to each other.

The vertical frame 41 is located immediately above the pile 311 and extends from the foundation beam 312 of the foundation 31 to the height of the floor on the roof floor. The vertical frame 42 is located immediately above the pile 311 and between the four vertical frames 41, and extends from the foundation beam 312 of the foundation 31 to the height of the floor on the seventh floor. These vertical frames 41 and 42 become pillars on the outer peripheral side of the new building 30.
The horizontal frame 43 is provided at the height of the floor of each floor, and connects the vertical frames 41 and 42 to each other in a rectangular frame shape. These horizontal frames 43 serve as beams on the outer peripheral side of the new building 30.

  In order to reinforce the structural body frame 40 on the equipment floor 33, an intermediate vertical frame 44 is provided at an intermediate position between adjacent vertical frames 41, 42, and a brace 45 is provided between the vertical frames 41, 42, 44. Is provided. The brace 45 may be provided at a necessary position as appropriate.

Next, a procedure for dismantling the existing building 10 and constructing the new building 30 at the same position as the existing building 10 will be described.
In step S1, the foundation 31 of the new building 30 is constructed as shown in FIG.
Specifically, first, a temporary enclosure 20 is installed along the outer periphery of the site. Here, let the upper side in FIG. 4 of the existing building 10 be the entrance / exit 21 of the tenant related person who uses the existing building 10. On the other hand, a panel gate 22 is provided on the right side of the existing building 10 in FIG. Thereby, since the flow line of the tenant-related person does not intersect with the flow line of the construction-related person, the tenant-related person can use the existing building 10 regardless of the progress of the work.

Next, the muddy water treatment plant 24 and the rebar processing plant 25 are installed in the site, and the pile driving machine 26 is assembled to prepare for placing the pile. Then, the pile 311 is driven while moving the pile driving machine 26 and the ready-mixed vehicle 27, and then the foundation beam 312 is constructed.
Moreover, in order to correspond to the newly built building 30, the capacity of the drawing-in infrastructure facilities such as gas, electric power, water supply / drainage, and communication line is increased.
Therefore, in this state, all floors of the existing building 10 are in use.

In step S <b> 2, as shown in FIG. 5, the equipment core 35 from the first floor to the equipment floor 33, the equipment floor 33, and the structure frame 40 for supporting the equipment floor 33 are constructed.
First, the upper surface of the equipment device 122 on the roof floor of the existing building 10 is covered with a scaffold board or the like to protect the equipment device 122. Furthermore, a roof 211 is provided at the entrance / exit 21 of the tenant related person to ensure the safety of the tenant related person. Further, a lifting crane 28 is installed in the vicinity of the existing building 10, and a scaffold 29 having a height to the equipment floor 33 is provided so as to surround the equipment core 35 and the structure frame 40. 5, 7, 8, and 11, only the scaffold around the equipment core 35 is shown, and the display of the scaffold around the structure frame 40 is omitted.

Next, the lifting machine 28 is used to construct the equipment core 35 from the first floor to the equipment floor 33, the equipment floor 33, and the structure frame 40 for supporting the equipment floor 33.
Here, as shown in FIG. 6, a joint portion 359 </ b> A and a beam / slab receiver 359 </ b> B for connecting to the beam or slab of the new building 30 on the wall surface of the equipment core 35 on the first floor to the fifth floor on the existing building 10 side. Is provided.

  Since the low-rise elevator 353 of the equipment core 35 is operable with the equipment cores 35 constructed from the first floor to the sixth floor, materials are lifted using this.

In addition, sub-shafts 331 are provided at two locations so that they can be used for special purposes such as 24-hour support and temporary construction, and equipment for operating not only the new building 30 but also the existing building 10 on this equipment floor 33 Is installed.
Further, a useless opening 332 penetrating vertically is provided at the corner of the equipment floor 33.

In step S3, as shown in FIG. 7, the equipment system of the existing building 10 is switched, and power, gas, water, and the like are supplied from the equipment on the equipment floor 33 to each floor of the existing building 10.
Specifically, first, as indicated by the arrows in FIG. 7, the equipment piping of the equipment core 35 from the first floor to the fifth floor is extended horizontally, and the equipment piping is extended downward from the equipment floor 33 through the sub shaft 331. Then, it is connected to facilities on each floor of the existing building 10.

Next, the disaster prevention center of the equipment core 35, the low-rise elevator 353, the toilet 355, the hot water supply room 356, and the like can be used. And the installation system of the existing building 10 is switched, the installation equipment of the installation floor 33 and the installation core 35 is operated, and the operation | movement of the installation equipment of the roof floor of the existing building 10 or the 1st basement floor is stopped.
When the equipment system is switched in this way, the equipment devices 121 and 122 on the first basement floor and the rooftop floor become unnecessary, and thus these equipment devices 121 and 122 are removed. Moreover, the outer wall penetration process of the existing building 10 is performed, and the tenant related person can use the equipment core 35.

Next, the mini heavy machine 51 for dismantling is disposed on the roof through the useless opening 332. After the mini heavy machine 51 is put on the roof, this useless opening 332 is closed.
In addition, in order to prevent water leakage of the equipment core 35 and the equipment floor 33, temporary waterproofing is performed on the floor surface on the seventh floor above the equipment floor 33.

  Next, the already-provided scaffold 29 is extended upward to the height of the floor of the rooftop floor, and the equipment core 35 from the seventh floor to the rooftop floor is constructed using this scaffold 29.

In step S4, as shown in FIG. 8, the 7th floor to the 9th floor of the upper structure 34 are constructed, and a temporary waterproof treatment is performed on the floor surface of the 10th floor in order to prevent water leakage on the 7th floor to the 9th floor. Then, the equipment on the seventh floor to the ninth floor is operated by the equipment on the equipment floor 33.
Next, as indicated by arrows in FIG. 8, tenants on the third floor and the fourth floor of the existing building 10 are moved to the upper structure portion 34.
Therefore, in this state, the seventh floor to the ninth floor of the new building 30 and the first floor and the second floor of the existing building 10 are in use.

Next, as shown in FIG. 9, the existing building 10 from the roof floor to the fourth floor rise is dismantled.
Specifically, temporary waterproofing is performed on the third floor of the existing building 10, and then a support 52 is installed on the third floor to reinforce the fourth floor for heavy machinery.
Next, in order to prevent noise and vibration, it is cut with a wire saw and divided into a plurality of blocks. At this time, since the floor surface of the third floor is subjected to temporary waterproofing treatment, it is possible to prevent the first floor and the second floor of the existing building 10 from leaking even if water is discharged during the cutting operation.
Subsequently, the divided blocks are lowered to the first floor with the mini heavy machinery 51, and then crushed and disassembled. In addition, since the first basement is an empty space, the first basement is used as a demolition material recycling plant.

Next, as shown in FIG. 10, a formwork supporting work 53 is installed on the fourth floor of the existing building 10, and the lower structure portion is placed in the space where the fourth floor and the roof floor of the existing building 10 existed. Build 32 4th floor and 5th floor. At this time, the beam or slab of the new building 30 is connected to the equipment core 35 using the joint portion of the equipment core 35.
After the 4th floor rise and the 5th floor are constructed, the 5th floor rise is constructed.

In step S5, as shown in FIG. 11, the 10th floor and the 11th floor of the upper structure 34 are constructed, and the waterproofing process is performed on the floor surface of the rooftop floor. Then, the equipment on the 10th and 11th floors are operated by the equipment on the equipment floor 33.
Next, tenants on the first and second floors of the existing building 10 are moved to the tenth and eleventh floors of the upper structure part 34.
Therefore, in this state, the 7th to 11th floors of the new building 30 are in use.

Next, support is installed on the 2nd floor of the existing building 10 to reinforce the 3rd floor, and the parts from the 4th floor to the rise of the 3rd floor of the existing building 10 are dismantled using wire saw and mini heavy equipment. To do.
Next, a formwork support is installed on the 3rd floor of the existing building 10 and the 3rd floor rise and 4th floor of the lower structure 32 are placed in the space where the 3rd and 4th floors of the existing building 10 existed. Building the floor.

Next, support is installed on the first floor of the existing building 10 to reinforce the floor on the second floor, and the part from the third floor of the existing building 10 to the rise of the second floor is dismantled using wire saw and mini heavy equipment. To do.
Next, a formwork support is installed on the second floor of the existing building 10, and the second floor rise and the third floor of the lower structure 32 are placed in the space where the second and third floors of the existing building 10 existed. Building the floor.

Next, a support is installed on the first basement floor to reinforce the first floor, and the part from the second floor to the rise of the first floor of the existing building 10 is dismantled using wire saws and mini heavy equipment.
Next, a formwork supporting work is installed on the first floor of the existing building 10, and the first floor rise and the second floor of the lower structure 32 are placed in the space where the first floor and the second floor of the existing building 10 existed. Building the floor.

According to this embodiment, there are the following effects.
(1) The upper structure part 34 is constructed in order from the lower layer, and the existing building 10 is transferred to the constructed upper structure part 34 in order from the upper layer to tenant personnel, fixtures, and fixtures. Then, since the existing building 10 becomes vacant in order from the upper layer, the building 10 is dismantled in order from the vacant layer. Therefore, since the existing building 10 can be used even if rebuilding work is started, it is not necessary to provide a temporary tenant relocation destination, and the burden on the tenant side accompanying relocation can be reduced.
Moreover, the lower structure part 32 was constructed | assembled in order in the space where this existing building 10 existed while demolishing the existing building 10 from an upper layer. Therefore, when constructing the lower structure portion 32, a part of the existing building 10 that has not been demolished can be used as a support work.

  (2) Since tenant relocation becomes easy, it is easy to divert materials discharged from the existing building 10 such as fixtures, fixtures, and equipment to the new building 30. Therefore, it is possible to greatly reduce the industrial waste discharged from the construction site and reduce the environmental load.

  (3) Since the new building 30 is constructed at the same position as the existing building 10, the volume ratio can be easily increased. Therefore, it is suitable for businesses that increase the floor area ratio.

  (4) Since the underground floor and foundation of the existing building 10 are left, the cost can be reduced by effectively using the underground floor and foundation of the existing building 10. For example, the demolition material may be processed using the underground floor of the existing building 10 during the construction of the new building 30. Moreover, after completion of the new building 30, the first basement floor of the existing building 10 may be used as a tenant space, or a spring tank on the first basement floor may be used as a fire fighting water tank.

  (5) Facility equipment for supplying energy to the existing building 10, the lower structure portion 32, and the upper structure portion 34 is provided on the facility floor 33. Then, the facility floor 33 is constructed in advance, and energy such as electricity, gas, and water is supplied from the facility equipment on the facility floor 33 to the existing building 10 and the newly constructed lower structure portion 32 and upper structure portion 34. Also supply. Therefore, the existing building 10 can be continuously used while smoothly switching the facility system.

(6) The equipment core 35 includes an emergency staircase 351, two high-rise elevators 352, two low-rise elevators 353, an elevator hall 354, a toilet 355, a hot water supply room 356, and the like. Therefore, although the construction labor of this equipment core 35 increases, since the construction core 35 with many construction labors is constructed in advance, the construction period of the lower structure section 32 and the upper structure section 34 which are office zones is shortened. it can.
In addition, since the high-rise elevator 352 can be used to move to the upper structure 34 simply by moving from the existing building 10 in the vertical direction, the tenant can be transferred more easily and the transfer cost can be further reduced.

  (7) Since the demolishing material is processed on the first basement floor of the existing building 10, it is not necessary to provide a space for processing the demolishing material in the site, and the site can be used effectively.

  (8) Since the sub-shaft 331 is provided and the equipment piping is installed by using the sub-shaft 331, it can easily cope with special uses such as office zone layout change and 24-hour response.

  (9) Since the joint portion 359A and the slab receiver 359B are provided on the equipment core 35, and the beams and slabs of the new building 30 are connected to the equipment core 35 using the joint portion 359A and the slab receiver 359B, the lower structure portion 32 Can be built easily.

It should be noted that the present invention is not limited to the above-described embodiment, and modifications, improvements, etc. within a scope that can achieve the object of the present invention are included in the present invention.
For example, although one facility floor 33 is provided in the present embodiment, a plurality of facility floors may be provided when the scale of a building increases.

Moreover, in this embodiment, although the equipment core 35 was provided in one side surface, it is not restricted to this, You may provide an equipment core in two side surfaces mutually back-to-back. For example, as shown in FIG. 12 (a), two equipment cores 35A may be provided so as to face each other, and as shown in FIG. 12 (b), the two equipment cores 35B are not opposed to each other. It may be provided. Further, as shown in FIG. 12C, four facility cores 35 </ b> C may be provided at the four corners of the structure frame 40.
In addition, when a plurality of equipment cores are provided, they may be used temporarily for construction.

Moreover, it is good also as a different utilization method with the upper side structure part 34 on the equipment floor 33, and the lower side structure part 32 under the equipment floor 33. FIG. For example, businesses that use air-conditioning equipment, such as a 24-hour bank or a trading company dealing room, may be arranged in either one at a time.
Further, the existing building 10 may be connected to the structure frame 40.

10 Existing Building 11 Existing Foundation 12 Existing Structure 30 New Building 31 Foundation 32 Lower Structure 33 Facility Floor (Horizontal Structure)
34 Upper structure part 35, 35A, 35B, 35C Equipment core (vertical structure part)
40 Structure frame 41, 42 Vertical frame 43 Horizontal frame 111 Pile 112 Fuchin 113 Foundation beam 121, 122 Equipment 311 Pile 312 Foundation beam 331 Sub-shaft 351 Emergency stair (vertical moving means)
352 High-rise elevator (vertical movement means)
353 Elevator for low rise (vertical movement means)
354 Elevator hall 355 Toilet (water supply and drainage equipment)
356 Hot water supply room (water supply and drainage equipment)
359A Joint part 359B Slab receiver

Claims (1)

A building construction method for constructing a new building at the same position as an existing building,
A new building is configured including a lower structure part, a horizontal structure part, an upper structure part, and a vertical structure part that are provided on the side surfaces of these three structure parts and extend in the vertical direction, and are divided in order from the bottom,
While constructing the vertical structure along the side of the existing building, constructing a horizontal structure so as to cover the existing building, the existing structure, the lower structure, and the upper side in the horizontal structure a step of Ru provided equipment for supplying energy to the structure,
Performing the work of constructing the upper structure part from the lower layer on the horizontal structure part and the work of constructing the lower structure part in the dismantled space while dismantling the existing building from the upper layer; The building construction method characterized by comprising.

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