JP4684027B2 - Construction method that expands / newly builds / extends / renovates while operating an existing building - Google Patents

Description

  The present invention belongs to the technical field of a construction method for expanding or renovating an existing building while operating, or a construction method for expanding or renovating an existing building while operating.

  When rebuilding, re-building, or seismic retrofitting of an old large-scale commercial facility (including department stores; the same applies hereinafter) that occurs in urban redevelopment, etc., it is generally accompanied by the destruction of all or part of the existing building Is.

  However, in rebuilding large-scale commercial facilities caused by redevelopment of cities, etc., preparation prior to the start of construction is more complicated than construction itself, such as business compensation for tenant contractors and securing of relocation destinations during construction. In addition, there are cases where it is difficult to carry out redevelopment work because it is forced to move tenants who are currently occupying temporarily, but it is difficult to carry out redevelopment work.

  This trend is related to the fact that the more value-added office districts or commercial areas are in the urban areas, the larger the structures are, the more tenant contractors, the greater the number of negotiating departments, and the more difficult tasks are piled up. Moreover, even if the owner of a large-scale commercial facility plans rebuilding, it is extremely difficult to realize it, and most of them are handled by renovation work and earthquake-resistant repairs.

  Therefore, there is a need for technology capable of rebuilding an aging large-scale commercial facility without causing any trouble in tenant sales and the like, and the social demand has been increasing in recent years.

  In Patent Document 1, a building is constructed by penetrating a courtyard, a surrounding vacant lot, or a part of the building in operation and projecting the upper construction building foundation and core from the existing building to the upper part. A technology for constructing a new construction in an upper space of an existing building on the basis of the above is disclosed (see the amended claims). According to this technology, it can be said that building can be rebuilt or rebuilt without stopping the operation of existing buildings, and the fears of tenants who are likely to leave customers due to relocation will be resolved, contributing to the promotion of rebuilding plans ( See effect of the invention).

  In Patent Document 2, the basic concept is almost the same as that of Patent Document 1, but a large-scale high-rise building is constructed in the upper space of the existing building, and the existing building is horizontally divided for each floor. A technique characterized by performing interior / exterior construction is disclosed (for details, refer to the claims). According to this technology, it is stated that the building can be rebuilt without stopping the operation of the existing building, the fear of tenants who are afraid of leaving customers due to relocation can be solved, and it can contribute to the promotion of the rebuilding plan (invention of the invention) See Effect).

  In Patent Document 3, as shown in FIG. 4 of the same Document 3, a core part 4 of a newly constructed building is constructed in the adjacent space of the ground where the existing building 1 exists, and then the existing core part 4 is used to construct the existing part. A technique is disclosed in which an artificial ground 5 of a newly constructed building is constructed above the top of the building, and then a newly constructed building is constructed sequentially on the artificial ground 5, and then the existing building 1 is repaired. (See claim 1). According to this technology, it is not necessary to dismantle the existing building, the building to be preserved can be preserved while maintaining the original shape of the building, and it is necessary to temporarily move from the existing building to another building when constructing a new building There is no, and decentralization can be avoided. Further, it is described that an existing building can be used continuously during construction of a new building (see paragraph [0013] of the effect of the invention).

In Patent Document 4, as shown in FIG. 2 of Patent Document 4, foundations 11a are provided on the front and rear sides of the existing building 1 or outside front and rear left and right sides. A support frame 10A for extension serving as an outer shell of the existing building 1 is constructed so as to three-dimensionally surround the front, rear, left, and right and above and to form a gap between the outer periphery of the existing building 1 and above the support frame 10A. The multi-story building 10B is expanded, and a large number of pillars 1b on the front and rear, front, rear, left and right outer peripheries of the existing building, and leg frames 10A ₁ and 10A ₂ of the pillars 12a _{1 of} the supporting frame 10A that oppose them rigid joined by connecting member _15a 1 to 15A ₃ at a point, seismic retrofitting discloses a technique of existing building 1 (see claim 1). According to this technology, the site can be used effectively, and the existing building is reinforced using the support frame for extension, so there is no use restriction during the extension work. Moreover, since existing buildings are kept alive, it is described that the production of building waste can be made substantially zero, the amount of carbon dioxide generated can be reduced, and it is an environment-friendly extension method (invention). Effect paragraph [0022]).

  In Patent Document 5, the core part of the existing building is reinforced so as to bear the long-term vertical load of the extension part, the core pillar of the extension part is connected, and the beam and slab of the extension part are connected to the core part of the extension part. A technique is disclosed in which a damping device such as a damper is provided between the outer peripheral column of the extension portion and the existing frame, which is constructed as a cantilevered frame. According to this technology, since the outer periphery of the existing building and the outer periphery of the extension part are separated from each other so as to be relatively deformable, it is possible to avoid excessive vibration energy input to the outer periphery of the existing building. In addition, it is described that vibration energy can be controlled by the action of a damping device installed therebetween (see paragraph [0035] of the effect of the invention).

JP-A-61-130566 JP-A-5-27744 JP-A-6-323001 JP 2000-314237 A JP 2004-353351 A

  Each of the techniques according to Patent Documents 1 to 5 has the following problems although the effects described above are recognized for the time being.

  The technology according to Patent Document 1 has a problem that construction is large and costs are enormous because it is an indispensable constituent requirement to newly construct a foundation for providing a new building in the upper space of an existing building. .

  In addition to the above-mentioned problem being noticeable, the technology according to Patent Document 2 divides the existing building horizontally and performs interior / exterior construction for each floor, so the construction flow line and the service flow line are divided vertically. However, it is necessary to devise a device for avoiding this, and the cost is further increased. In addition, when the existing building is a department store, there is also a problem that it is not inconvenient for customers who shop.

  The technology according to Patent Document 3 requires that a core part be constructed in an adjacent space where an existing building is not constructed, but constructing the core part is a famous building, a historical building, etc. (See paragraph [0002] of Patent Document 3), it is difficult to secure a space for constructing the core part in a large commercial facility in an urban area where buildings and the like stand. There is a problem that is not.

  Since the technology according to Patent Document 4 requires that large foundations be provided on the front and rear sides of the existing building or outside the front, back, left, and right sides, the problem relating to Patent Documents 1 and 3 is held, and the buildings are There is a problem that it is not realistic to apply to large commercial facilities in urban areas.

  Since the technology according to Patent Document 5 reinforces the core part of an existing building and is connected to the core part column of the extension part, it can be implemented in the building site and provides a foundation for providing the extension building. do not need. Therefore, the problem concerning the said patent documents 1, 3 and 4 does not arise. However, in the technique according to Patent Document 5, in addition to supporting the extension portion with the reinforced core portion, the beam and the slab of the extension portion are the cantilever frame supported by the core portion of the extension portion. Therefore, there is a problem that the weight limit is strictly imposed on the extension part. As described above, the technique according to Patent Document 5 can be suitably applied to a building such as a pencil building having a high aspect ratio. However, in general, there is a limit in structural mechanics for application to a large-scale commercial facility having a high aspect ratio. It can be said that there is.

  In short, it is possible to build a high-rise building in the upper space of an existing building without establishing a new foundation for technology that can be used to rebuild old large-scale commercial facilities without causing problems for tenant operations, etc. In addition, the construction flow and service flow are not divided up and down, and no technology suitable for implementation in large-scale commercial facilities in urban areas where buildings and the like are forested can be found so far. .

  The object of the present invention is to build a high-rise building in the upper space of an existing building without newly providing a foundation, without dividing the construction flow line and service flow line up and down, and in an urban area where buildings and the like are forested By providing a construction method that allows an existing building to be expanded or renewed or expanded or renovated while it can be suitably implemented without disrupting the operations of tenants, etc. is there.

As a means for solving the above-mentioned problems, the construction method for expanding and newly constructing an existing building according to the invention described in claim 1 is provided with a space part that dismantles a part of the existing building and penetrates in the vertical direction. , A process of newly constructing a mega pillar of a height and scale sufficient to construct a high-rise building above the roof of the existing building using the existing foundation in the space portion;
Using the mega pillar to newly build a high-rise building in the upper space of the existing building;
The existing building is divided into vertical work sections, and tenants, offices, residences, etc. are moved to the newly built high-rise building for each divided vertical work section, and then the vertical work section is dismantled and newly constructed, and so on. It consists of the process of relocating each vertical work area, dismantling work, and renovating existing buildings by proceeding with new construction work.

The construction method for expanding and renovating an existing building according to the invention described in claim 2 is a method of dismantling a part of the existing building and providing a space portion penetrating in the vertical direction, and utilizing the existing foundation in the space portion. Then, a process of newly constructing a mega pillar of a height and scale sufficient to build a high-rise building above the roof of the existing building,
Using the mega pillar to newly build a high-rise building in the upper space of the existing building;
The existing building is divided into vertical work zones, and tenants, offices, residences, etc. are moved to the newly built high-rise building for each divided vertical work zone, and then the vertical work zone is repaired. It consists of a process of renovating an existing building with each relocation and renovation work.

  According to the construction method of expanding and renewing or operating the existing building according to claims 1 and 2, or using the foundation of the existing building, a high-rise building is newly built in the upper space of the existing building. It is economical because there is no need to provide a new foundation, and it can be suitably applied to large commercial facilities in urban areas where buildings and the like stand. In addition, since tenant sales and the like are temporarily moved to the high-rise building and can be continuously performed, the fear of tenants who are afraid of leaving customers due to relocation can be solved. In addition, new construction or renovation work for existing buildings is performed by dividing the existing building into vertical work sections and sequentially performing each divided vertical work section, so the work flow line and service flow line are not divided vertically, which is inconvenient for the customer. There is no fear of feeling. Therefore, it is possible to realize a technology that meets social demands that can be used for rebuilding an old large-scale commercial facility without causing any trouble for tenant business.

  The construction method for expanding / newly building or expanding / renovating while operating an existing building according to the present invention is carried out as follows in order to achieve the effects of the above-described invention.

  1A to 1E schematically show process diagrams of a construction method for expanding and newly building an existing building according to the invention described in claim 1. The construction method is a construction method for expanding and newly constructing an existing building 1 as shown in FIG. 1A while operating. As shown in FIG. 1B, a part of the existing building 1 is disassembled and penetrated in the vertical direction. A space part is provided, and a mega pillar 3 having a height and scale sufficient to construct a high-rise building 4 above the roof of the existing building 1 is constructed in the space part by using the existing foundation 2. Is used to construct a high-rise building 4 in the upper space of the existing building 1. As shown in FIG. 1C and FIG. 1D, the existing building 1 is divided into vertical work sections, and tenants, offices, residences (not shown) are moved to the newly built high-rise building 4 for each divided vertical work section. After that, dismantling work and new construction work in the vertical work area will be carried out, and then the dismantling work and new construction work will be carried out in sequence for each vertical work area. Finally, as shown in Fig. 1E, the existing building 1 will be renovated. It is performed (Invention of Claim 1). This will be specifically described below.

  2A and 2B show a process of dismantling a part of the existing building 1 and providing a space X that penetrates in the vertical direction. In this case, it should be noted that the part to be dismantled uses a floor or the like that avoids the tenant so that the tenant's business or the like is not hindered, and the elevator 6 is left as it is and can be started. In addition, the existing building 1 which concerns on the example of illustration assumes the department store of 7 stories above ground and 3 stories underground. Specifically, the department store is built on a building area of 32.0 m × 76.8 m with a scale of 30.1 m above the ground and 13.2 m below the ground.

  3A and 3B, a process of newly constructing a mega pillar 3 having a height and a scale sufficient to construct a high-rise building 4 above the roof of the existing building 1 using the existing foundation 2 in the space X, The process of disassembling a part of the existing building 1 and providing a space portion Y penetrating in the vertical direction is shown. In this case, it is preferable to provide the mega pillar 3 provided with the elevator 3b in the space X prior to the step of providing the space Y in order to ensure the activation of the elevator 6. The mega pillar 3 according to the present embodiment is implemented so that the passage space such as the staircase 3a, the elevator (shaft) 3b, and the passage is concentrated and the flow line core that shortens the service flow line is also used.

  4A and 4B, the step of constructing the mega pillar 3 in the space Y, and the step of constructing the high-rise building 4 in the upper space of the existing building 1 using the mega pillar 3 are performed. Show. Four mega pillars 3 according to the present embodiment are installed in a well-balanced manner in the existing building 1 when viewed from the plane direction. The high-rise building 4 according to the present embodiment is constructed in five stories (21.5 m) above the existing building 1 with an interval necessary for work by a tower crane (not shown). It can also be constructed so as to be continuous with the existing building 1 without leaving a large interval.

  Of course, the number of mega pillars 3 (the number of space portions X and Y) is not limited to four, and the design can be changed as appropriate according to the size and shape of the existing building 1 to be implemented. Moreover, although there is no restriction | limiting in particular in the height of the said mega pillar 3, It should be noted that it is constructed by protruding the height necessary for constructing the high-rise building 4. Furthermore, it should be noted that the scale of the high-rise building 4 secures a space where at least a tenant to be relocated for the rebuilding of the existing building 1 can operate sufficiently. In addition, it is a condition that the total weight of the mega pillar 3 and the high-rise building 4 is within the allowable limit of the weight that can be supported by the existing foundation 2. Therefore, it is preferable in terms of structural mechanics that the high-rise building 4 is lightened by using lightweight concrete.

  Thus, as shown in FIG. 4A, the mega pillar 3 incorporating the stairs 3a and the elevator 3b and the like can be stably constructed using the existing foundation 2, and the mega pillar 3 can be used to The partial building 4 can be stably constructed in an independent state above the existing building 1.

  FIGS. 5 to 7 show the steps of building the high-rise building 4 and dividing the existing building 1 immediately below it into a vertical work section and sequentially performing rebuilding work for each divided vertical work section. . Incidentally, in the illustrated example, the existing building 1 is divided into three parts, a left part L, a middle part C, and a right part R, with the installation site of the mega pillar 3 as a guide. The division method and the number of divisions are of course not limited to this, and can be appropriately changed according to the shape and size of the existing building 1.

  FIGS. 5A and 5B show a stage in which the left part L of the existing building 1 including the left mega pillar 3 in the figure is rebuilt in the vertical direction (dismantling work and new construction work are performed). When performing this rebuilding work, it should be noted that tenants operating in the rebuilding part L have been moved into the high-rise building 4 in advance using the elevator 3a in the mega pillar 3 or the like. In this embodiment, the method of leaving the basement part without changing the base is adopted, but it is of course possible to carry out the whole face rebuilding including the basement part. Thus, the dismantling work of the left portion L removed by the tenant or the like is performed, and the construction of the new construction work is completed. Incidentally, in the present embodiment, the existing building 1 having seven floors above the ground is rebuilt to a new building 10 having nine floors above the ground, but the number of floors after the rebuilding is not particularly limited.

  FIGS. 6A and 6B show a stage in which the intermediate portion C of the existing building 1 between the left and right mega pillars 3 and 3 in the figure is rebuilt in the vertical direction (dismantling work and new construction work are performed). In carrying out this rebuilding work, it should be noted that tenants operating in the intermediate part C have moved in advance. As for the relocation destination, it is common to move to the high-rise building 4 using the elevator 3a in the mega pillar 3, etc., but the tenant operating in the left part L is the left part L after the new construction. If it does not return to, it can be moved to the left part L after the new construction. Thus, the deconstruction work of the reconstructed part C removed by the tenant or the like is performed, and the construction of the new construction work is completed.

  7A and 7B show a stage in which the right portion R of the existing building 1 including the right mega pillar 3 in the figure is rebuilt in the vertical direction (dismantling work and new construction work are performed). In carrying out this rebuilding work, it should be noted that tenants operating in the right part R have moved in advance. The relocation destination can be moved into the high-rise building 4 using the elevator 3a in the mega pillar 3, etc., and the tenant operating in the middle part C does not return to the newly built middle part C Can be transferred to the newly built intermediate part C, and so on. In this way, the rebuilding part R removed by the tenant and the like is dismantled, and the construction of the new construction is completed.

  Therefore, as a result of the tenant relocation, dismantling work, and new construction work for each of the vertical sections L, C, and R into which the existing building 1 was divided, the existing building 1 with 7 floors above the new building 10 with 9 floors above ground. As a whole, as shown in FIG. 8, the building can be rebuilt to a new building 5 having three floors below ground and 14 floors above ground.

  As described above, according to the construction method for expanding and newly building the existing building 1 according to the invention described in claim 1, the high-rise part is formed in the upper space of the existing building 1 using the foundation 2 of the existing building 1. Since the building 4 can be constructed independently, the existing foundation 1 can be reused without providing a new foundation, which is economical. Moreover, it can implement suitably for the large commercial facility of the urban area where a building etc. stand. The tenant's business can be temporarily moved to the high-rise building 4 and continuously performed, so that the tenant's fear of leaving the customer due to the relocation can be solved. In addition, new construction work for the existing building 1 is divided into the vertical work sections of the existing building 1 and sequentially performed for each divided vertical work section, so that the work flow line and the service flow line are not divided up and down, causing inconvenience to the customer. There is no fear of feeling. Therefore, it is possible to realize a technology that meets the social demands for rebuilding an old large-scale commercial facility without causing any trouble to the tenant's business. In addition, this construction method can dramatically increase the total floor area of the building, which can greatly contribute to the improvement of the asset value of large commercial facilities.

  Next, a construction method for expanding and repairing an existing building according to the invention described in claim 2 while operating will be described. This construction method is different from the construction method according to claim 1 described above only in that repair work such as earthquake-resistant construction is performed instead of rebuilding construction for each of the vertical construction sections L, C, and R (claim 2). Described invention). Therefore, according to the construction method of expanding and refurbishing while operating the existing building 1 according to the invention described in claim 2, the number of floors of the existing building 1 itself cannot be increased, but an effect similar to the above effect is expected. can do.

  Although the embodiments have been described with reference to FIGS. 1 to 8, the present invention is not limited to the embodiments of the illustrated examples, and design changes that are usually made by those skilled in the art without departing from the technical idea thereof, Note that it includes a range of application variations.

A to E are elevation views schematically showing process diagrams of a construction method for expanding and newly building an existing building according to the invention described in claim 1 while operating. A is an elevation view showing a space portion X provided in a part of the existing building 1, and B is a plan view thereof. 2A is an elevational view showing a space Y provided in a part of the existing building 1 while providing the mega pillar 3 in the space X of FIG. 2, and B is a plan view of the same. 3A is an elevation view showing the high-rise building 4 provided in the upper space of the existing building 1 while providing the mega pillar 3 in the space Y of FIG. 3, and B is the same plan view. A is an elevation view showing a vertical work section L obtained by dividing an existing building into vertical work sections, and B is a plan view thereof. A is an elevation view showing a vertical work section C obtained by dividing an existing building into vertical work sections, and B is a plan view thereof. A is an elevation view showing a vertical work section R obtained by dividing an existing building into vertical work sections, and B is a plan view thereof. A is an elevational view showing a state in which a construction method for extending and newly building an existing building according to the invention described in claim 1 is completed, and B is a plan view thereof.

Explanation of symbols

1 Existing building 2 Existing foundation 3 Mega pillar 3a Stair 3b Elevator (shaft)
4 High-rise building 5 New building 6 Elevator 10 New building X, Y Space L, C, R Longitudinal zone

Claims (2)

It is a construction method that expands and builds an existing building while operating it.
A space part penetrating in the vertical direction by dismantling a part of an existing building is provided, and a height and scale sufficient to construct a high-rise building above the rooftop of the existing building using the existing foundation in the space part. The process of building a new mega pillar,
Using the mega pillar to newly build a high-rise building in the upper space of the existing building;
The existing building is divided into vertical work sections, and tenants, offices, residences, etc. are moved to the newly built high-rise building for each divided vertical work section, and then the vertical work section is dismantled and newly constructed, and so on. The construction method of extending and newly constructing an existing building while operating, characterized by comprising the process of relocating each vertical work zone, dismantling work, and renovating the existing building. It is a construction method that expands and renovates while operating an existing building,
A space part penetrating in the vertical direction by dismantling a part of an existing building is provided, and a height and scale sufficient to construct a high-rise building above the rooftop of the existing building using the existing foundation in the space part. The process of building a new mega pillar,
Using the mega pillar to newly build a high-rise building in the upper space of the existing building;
The existing building is divided into vertical work zones, and tenants, offices, residences, etc. are moved to the newly built high-rise building for each divided vertical work zone, and then the vertical work zone is repaired. A method of expanding and refurbishing while operating an existing building, which consists of a process of relocating and renovating each existing building and repairing the existing building.

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