JP6506085B2 - Construction method - Google Patents

Description

  The present invention relates to a construction method in which dismantling of an existing building and construction of a new building are simultaneously performed in a rebuilding method of sequentially rebuilding an existing building from a lower floor to an upper floor.

  Conventionally, when rebuilding an existing building into a new building, the procedure is to construct the new building after dismantling the existing building.

The following patent documents have been proposed as a method for extending or renovating a building which can be rebuilt or rebuilt while disassembling an existing building, requiring no relocation, and using it.
JP-A-6-323001

  This patent document 1 constructs the core part of the building to be newly built in the adjacent space where the existing building is not constructed, and the artificial ground of the building to be newly built above the top of the existing building from the core part And then construct a new building on this artificial ground, and then restructure the existing building, and then build an artificial ground above the top of the existing building. Since the extension part is built on top of that and the office worker is moved from the existing building to that part, the existing building will be remodeled, so it will be possible to add or rebuild while continuing to use the existing building.

Further, as a method of increasing the number of rooftops while operating existing buildings, the following patent documents have been proposed.
Japanese Patent Application Laid-Open No. 61-130566

  In this patent document 2, a pile for new construction is constructed using a courtyard or an open space around the existing building, or a part of the space of the building secured by the relocation of the tenant contractor if there is none of these. A tower crane is installed on a pile, and while doing floor climbing, this core part is projected and built up to the existing building upper part, it projects and built up to the existing building upper part based on the said projecting part, the said projection The new building will be built on the roof of the existing building on the basis of the department.

  According to Patent Document 2, it is possible to rebuild or increase the number of high-rise buildings without stopping the operation of existing buildings.

In the construction method when dismantling an existing building and constructing a new building at that position, in particular, re-developing existing buildings or rebuilding into a larger building, the following patent documents are available as construction methods Proposed.
Japanese Patent Laid-Open No. 2-30854

  This patent document 3 is a method of disassembling an existing building or a group of buildings and newly constructing a large building according to the position, a process of constructing a main frame of a higher hierarchical building across the existing building, the main frame The process of forming the top floor supported by the roof beam of the building, the process of transferring the top facility of the existing building to the top floor of the new construction, the process of dismantling the top facility, and after the dismantling part of the top facility It is characterized in that it includes the steps of supporting the top floor and newly constructing the floor immediately below, repeating the transfer to a new part, dismantling, and new construction after dismantling from the upper layer to the lower layer. Reconstruction method for multi-story buildings.

  According to Patent Document 3, there is a method of disassembling an existing building or a group of buildings and newly constructing a larger building at that position, wherein a foundation is constructed at the outer peripheral position of the existing building or a group of buildings and their foundations A pillar will be built on top, and it will be one floor higher than the highest part of the existing facilities, and a main steel frame erection frame will be built over the existing facilities. In parallel with this method of construction, work will be advanced on the construction of stairs, elevators and other elevator facilities, and shafts for electricity and water supply and drainage facilities.

  Then, a roof was erected on the above main frame. The roof beams will be supported to build a floor on the top floor above the existing building, and will carry out the exterior wall, equipment, and finishing work.

  As a result, the highest facility or the other part of the existing building can be moved to the new construction, and the highest facility etc. can be dismantled.

  Then, the floor girder of the top floor is supported, and the floor immediately below the newly built top floor is newly built by one or more layers after the dismantling part of the highest facility and the like.

  Thereafter, all facilities are moved to the new building by repeating from the upper layer to the lower layer, repeating relocation to new construction part, dismantling, and new construction after dismantling part, considering the amount of relocation and the new construction amount. In the meantime, new construction can be completed and all the facilities can be housed in the new building with only one relocation of each removal part, without stopping any residence or business activities.

  When the scale of the new building is large, a high-rise portion can be constructed on the upper floor in parallel with the work, and likewise, the construction of the basement can also be constructed as a reconstruction or an extension portion.

When rebuilding the existing building into a new building, if the procedure for constructing the new building is performed after dismantling the existing building, the problems at that time include the following.
(1) It takes a long construction period to complete new construction after dismantling work.
(2) Both dismantling work and new construction work require temporary constructions, but it is general to remove most temporary constructions at the end of dismantling construction and install temporary constructions again at new construction.
(3) A large amount of exported items are generated at the time of dismantling work, and a large amount of imported items are generated at the time of new construction.
(4) There is a problem that it is often more economical to dispose of a large number of reusable components in existing buildings due to storage and shipping costs.
(5) In the new construction work, there are a lot of work in an unstable state at the time of construction work of the frame, and a lot of safety considerations are needed.

  The Patent Documents 1 and 2 make it possible to rebuild while continuing to use the existing building, and can not cope with the problem when dismantling the existing building and constructing a new building at the same time.

  Moreover, patent document 3 is not based on the procedure of the rebuilding method which rebuild | rebuilds an existing building sequentially from a lower floor toward an upper floor.

  The object of the present invention is to solve the problems of the conventional example and to construct a dismantling and new construction simultaneously as a procedure of rebuilding method to rebuild an existing building sequentially from the lower floor to the upper floor. As a result, the construction period is shortened To provide a construction method capable of reducing cost, reducing transportation volume, reducing environmental load, reducing waste, safety by work, and improvement of work efficiency.

In order to achieve the above object, the present invention according to claim 1 is a construction method in which dismantling of an existing building and construction of a new building are simultaneously performed, as a procedure of rebuilding method of sequentially rebuilding an existing building from lower floors to upper floors ,
(1) Supported by jacked temporary support in specific 2 levels (n floor and n + 1 floor) of existing building,
(2) Dismantle the pillars of the nth floor and the n + 1st floor,
(3) Jack down the existing n + 1 floor to a predetermined level,
(4) Construct pillars of the nth floor and construct new floors and beams of the n + 1st floor on the existing floor of the n + 1st floor,
(5) We install temporary support to support n + 2 floor on new floor of n + 1 floor,
(6) Disassemble the existing floor on the (n + 1) th floor and remove the jacked temporary support on the nth floor.
(7) Supported by the temporary post with jack at the existing n + 2 floor,
(8) Install a temporary post with jack on the floor of floor n + 1 and remove the temporary post, and disassemble the post on floor n + 2,
Thereafter, repeating the steps (3) to (8) is the gist.

The present invention according to claim 2 is a construction method for simultaneously dismantling an existing building and constructing a new building, as a procedure for rebuilding the existing building sequentially from the lower floor to the upper floor,
(1) We support by temporary support in specific two levels (n floor and n + 1 floor) of existing building,
(2) Dismantle the pillars of the nth floor and the n + 1st floor,
(3) Construct new floors and beams on the n + 1 floor above the existing floor on the n + 1 floor,
(4) Install a temporary post with jack to support the new floor and beam on the n + 1 floor on the n floor,
( 5 ) Dismantle the existing n + 1 floor,
( 6 ) Install a temporary post with jack on the floor of the new n + 1 floor, and remove the temporary post supported by the existing n + 1 floor,
(7) supported by the provisional設支pillars Te existing n + 2 floor smell,
( 8 ) Jack down the floor of the new n + 1 floor to a predetermined level,
( 9 ) Build a pillar on the nth floor,
( 10 ) Remove the temporary support of the nth floor.
The gist is that the steps (3) to ( 10 ) are repeated thereafter.

  According to the present invention as set forth in claim 1 and claim 2, dismantling of the existing main pillar, beam, floor, wall and new construction while supporting the upper floor with a temporary support at a specific lower floor of the existing building Performed in turn, move to other floors sequentially and repeat dismantling and construction, thus shortening construction period, reducing costs, reducing transportation volume, reducing environmental impact, reducing waste, improving work safety, and work efficiency. Is something that can be realized.

  In particular, the invention according to claim 1 is simplified by reducing the number of steps by jacking down the existing floor and creating a new floor.

The present invention according to claim 3 is characterized in that the existing n + 1 floor is used as a gantry to construct a new floor and beam of the n + 1 floor above the existing n + 1 floor. .

According to the third aspect of the present invention, by using the existing floor of the n + 1 floor as a gantry, temporary installation can be omitted and construction can be rationalized.

  As described above, the construction method of the present invention enables the construction period to be shortened by simultaneously dismantling the existing building and constructing the new building from the lower floor, and dismantling and new construction of the temporary building are planned simultaneously. The cost reduction and CO2 reduction effect can be brought about by the reduction of the transportation amount, and by simultaneously dismantling and new construction, it is possible to aim at the reduction of cost and environmental load by using an unloading vehicle in combination.

  In addition, it becomes easy to divert to a new building by constructing dismantling and new construction at the same time, and it becomes possible to contribute to the reduction of waste, and it is more stable by performing new construction using a part of the existing frame It is possible to improve the safety and efficiency of the work at the place where the

In the present invention, as a first embodiment, as a procedure of a rebuilding method for sequentially rebuilding an existing building from the lower floor to the upper floor,
(1) Supported by jacked temporary support in specific 2 levels (n floor and n + 1 floor) of existing building,
(2) Dismantle the pillars of the nth floor and the n + 1st floor,
(3) Jack down the existing n + 1 floor to a predetermined level,
(4) Construct pillars of the nth floor and construct new floors and beams of the n + 1st floor on the existing floor of the n + 1st floor,
(5) We install temporary support to support n + 2 floor on new floor of n + 1 floor,
(6) Disassemble the existing floor on the (n + 1) th floor and remove the jacked temporary support on the nth floor.
(7) Supported by the temporary post with jack at the existing n + 2 floor,
(8) A temporary support post 5 with a jack is installed on the floor of the n + 1 floor, the temporary support post 9 is removed, and the post on the n + 2 floor is disassembled,
Thereafter, the steps (3) to (8) are repeated.

  Embodiments of the present invention will now be described in detail with reference to the drawings. FIGS. 1 to 21 are explanatory views showing each process of the construction method of the present invention, and in FIG. 1, 1 in the figure shows an existing building.

  In the example shown in the figure, in the case of expanding the underground, for this purpose, a mountain ridge 2 is installed as shown in FIG. 2, and excavation and pile construction 3 is applied as shown in FIG. To extend

After that, Cycle 1 and Cycle 2 will be the basic 5 steps of each cycle, and the first cycle will be (1) supported by jacked temporary columns in specific two levels (n floor and n + 1 floor) of the existing building,
(2) Dismantle the pillars of the nth floor and the n + 1st floor,
(3) Jack down the existing n + 1 floor to a predetermined level,
(4) Construct pillars of the nth floor and construct new floors and beams of the n + 1st floor on the existing floor of the n + 1st floor,
(5) Disassemble the existing floor of the n + 1 floor and remove the temporary support post of the n floor 2nd cycle (6) Support with the temporary support post with jack at the existing n + 2 floor,
(7) Dismantle the pillar on the n + 2 floor,
(8) Jack down the existing n + 2 floor to a predetermined level,
(9) Construct pillars of the n + 1 floor and construct new floors and beams of the n + 2 floor on the existing floor of the n + 2 floor,
(10) Disassemble the existing floor on the n + 2 floor and remove the temporary support pillar on the n + 1 floor.

  Embodiments of the present invention will now be described in detail with reference to the drawings. FIGS. 1 to 21 are explanatory views showing each process of the construction method of the present invention, and in FIG. 1, 1 in the figure shows an existing building.

  In the example shown in the figure, in the case of expanding the underground, for this purpose, a mountain ridge 2 is installed as shown in FIG. 2, and excavation and pile construction 3 is applied as shown in FIG. To extend

After that, it progresses by the following phases.
Phase 1 (temporary installation) → Phase 2 (remove existing pillars) → Phase 3 (jacking down of the existing floor) → Phase 4 (construction of new pillars and floors) → phase 5 (disassembly of existing floor)

  Although the present invention repeats the cycle of these phase-1 to phase-5, the drawings will be described in detail for each phase below.

  As phase-1, as shown in FIG. 5, temporary support (with a jack) 5 is installed in B1F and B2F as shown in FIG. 5, and as shown in FIG. 6, other existing pillars 6 of B1F and B2F are disassembled as phase-2.

  As the phase-3, as shown in FIG. 7, the old B1F floor 7 is jacked down.

As phase- 4 , the floor and beam 8 of new B1F will be constructed with the old B1F floor 7 as a platform, the existing floor 2 of the new pillar part will be disassembled, and a new pillar (main construction) 10 of B2F will be constructed simultaneously (figure 8).

  As phase-5, as shown in FIG. 9, the old B1F floor 7 is partially disassembled, and a temporary support post 9 is additionally installed. Support upper load via new floor (floor and beam 8 of new B1F).

Here is the second phase cycle, but as phase 1, as shown in FIG. 10, the remaining part of the old B1F floor 7 and the jacked temporary support 5 are removed, and the B2F temporary support (with jack) 5 is made 1F. Switch to

As Phase-2, install the jacked temporary support column 5 on the floor of B1F, remove the temporary support column 9, and remove the 1F column (FIG. 11). As the phase-3, the old 1F floor 17 is jacked down (FIG. 12).

  As phase-4, the floor and beam 18 of the new 1F will be constructed using the old 1F floor 17 as a platform, the existing floor of the new pillar part will be dismantled, and a new pillar (main construction) 10 of B1F will be constructed simultaneously (Fig. 13 ).

  In Phase-5, the old 1F floor 17 is partially disassembled, and a temporary support post 9 is additionally installed. Support the upper load via the new floor (floor 1 of the new floor 1).

Here is the third phase cycle, but as phase 1, as shown in FIG. 15, the remaining part of the old 1F floor 17 and the temporary support column 5 with jack are removed, and the temporary support column (with jack) 5 of B1F is 2F Switch to

As phase 2, install 1F temporary column 5 with jack, remove temporary column 9, remove column 2F (Fig. 16) and jack down the old 2F floor 27 as phase 3 (Figure 17).

  As phase-4, the floor and beam 28 of the new 2F will be constructed using the old 2F floor 27 as a platform, the existing floor of the new pillar part will be dismantled, and a new pillar (main construction) 10 of 1F will be constructed simultaneously (Fig. 18) ).

  As Phase-5, as shown in FIG. 19, the old 2F floor 27 is partially disassembled, and a temporary support post 9 is additionally installed. Support top load via new 2F floor (new 2F floor and beam 28).

  As a fourth phase cycle, as shown in FIG. 20, the remaining part of the old 2F floor 27 and the temporary support 9 are removed as Phase-1 and the temporary support (with jack) 5 of 1F is changed to 3F.

  In Phase-2, move 2F columns and remove 3F columns. (Figure 21)

  Thereafter, the cycle of Phase-3 to Phase-5 is repeated in the same manner as described above to replace the existing building 1 with a new one.

Next, a second embodiment of the present invention will be described. As a 2nd embodiment, the present invention is a procedure of the rebuilding method which rebuilds an existing building sequentially from the lower floor to the upper floor (1) In two specific floors (n floor and n + 1 floor) of the existing building (with jacks) Supported by temporary support,
(2) Dismantle the pillars of the nth floor and the n + 1st floor,
(3) Construct a new floor beam of the n + 1 floor above the existing floor of the n + 1 floor,
(4) Install a temporary post with jack to support the new floor and beam on the n + 1 floor on the n floor,
( 5 ) Dismantle the existing n + 1 floor,
( 6 ) Install a temporary post with jack on the floor of the new n + 1 floor, and remove the temporary post supported by the existing n + 1 floor,
(7) supported by the temporary設柱Te existing n + 2 floor smell,
( 8 ) Jack down the floor of the new n + 1 floor to a predetermined level,
( 9 ) Build a pillar on the nth floor,
( 10 ) Remove temporary columns on the nth floor.
Thereafter, the steps ( 3 ) to ( 10 ) are repeated.

  Also in this second embodiment, FIGS. 1 to 4 are the same as the first embodiment, and a mountain ridge 2 is installed as shown in FIG. 2, and an excavation and pile construction 3 is shown as shown in FIG. And extend the foundation beam 4 as shown in FIG.

The temporary support columns 9 are installed on B1F and B2F as shown in FIG. 22, and the other existing columns 6 of B1F and B2F are disassembled as shown in FIG.

After that, it progresses by the following phases.
Phase-1 (construction of new floor) → Phase-2 (disassembly of old floor) → phase-3-1 (switching of support 1) → phase-3-2 (switching of support 2) → phase-4 (new floor) Jack down) → Phase-5 (column placement), Phase-6 (temporary removal)

  The present invention is to repeat the cycle of these phase-1 to phase-6, and the figures will be described in detail for each phase below.

  As phase-1 (construction of a new floor), the floor and beam 8 of a new BlF are constructed with the old B1F floor 7 as a platform (FIG. 24). In the figure, 11 is a temporary support (with a jack) for temporary support of the floor and the beam 8.

  As Phase-2 (disassembly of the old floor), the old BIF floor 7 is disassembled (FIG. 25).

As a phase-3-1 (support switching 1), a temporary support (with a jack) 11 is additionally installed in B1F and B2F, and switching from the support of the temporary support 9 until now to the support of this temporary support 11 Support the upper load via B1F floor remainder via new B1F floor (Figure 26).

As a phase -3-2 (support switching 2), the old B1F remaining portion and the temporary support post 9 are removed, and the temporary support post 9 is replaced with 1F (FIG. 27).

The Phase-4 (Shin floor jack down), to reduce the Jiyakki the temporary supports (with the jack) 11 in B2F, the jacking down extended to new B1F the Jiyakki the temporary supports (with the jack) 11 in B1F ( Figure 28).

  As Phase-5 (casting of a pillar), a pillar (built) 10 of B2F is drilled (FIG. 29).

As phase 6 (removal of temporary installation), the unnecessary temporary support pillar (with jack) 11 of B2F is removed, and the existing pillar 12 of 1F is removed (FIG. 30). The temporary support post 9 is additionally installed in B1F.

  Next, in the second cycle of phase-1 to phase-6, the new 1F floor / beam 18 is constructed with the old 1F floor 17 as a gantry (FIG. 31), and the old 1F floor 17 is disassembled (FIG. 32). A temporary support post (with a jack) 19 is additionally installed, and the upper load is supported via the new 1F floor from the old 1F floor remaining portion (FIG. 33).

  Remove the remaining part of the old 1F and the post, and change the post to 2F (Fig. 34). Jack down the new 1F (Figure 35). The B1F pillar (longitudinal installation) 21 is placed (FIG. 36).

  Remove unnecessary posts from B1F and remove columns from 2F (Fig. 37).

  Next, in the third cycle of phase-1 to phase-6, the new 2F floor / beam 28 is constructed with the old 2F floor 27 as a gantry (FIG. 38), and the old 2F floor 27 is disassembled (FIG. 39). A temporary support post is additionally installed, and the upper load is supported via the new 2F floor from the old 2F floor remaining area (Fig. 40).

  Remove the old 2F remaining part and the post, and change the post to 3F (Figure 41). Jack down the new 2F (Figure 42). The 1F pillar (longitudinal construction) 22 is set (FIG. 43).

  Remove unnecessary posts on 1F and remove posts on 3F (Figure 44).

  Thereafter, the cycle of phase-1 to phase-6 is repeated to replace the existing building 1 with a new building.

  In both of the first and second embodiments, an example is shown in which the new building is widened from the base portion compared to the existing building, but the present invention does not necessarily have to do so, and the same size or reduced size of the existing building It is also applicable when constructing a new building.

  In addition to the renewal of the existing building as a whole, it is also applicable to partial extension and reconstruction and renewal.

  In any of the above cases, the number of floors and the floor height can be appropriately applied.

It is explanatory drawing of the 1st process which shows embodiment of the construction method of the construction method of this invention. It is explanatory drawing of the 2nd process which shows embodiment of the construction method of the construction method of this invention. It is explanatory drawing of the 3rd process which shows embodiment of the construction method of the construction method of this invention. It is explanatory drawing of the 4th process which shows embodiment of the construction method of the construction method of this invention. It is explanatory drawing of the 5th process which shows 1st Embodiment of the construction method of the construction method of this invention. It is explanatory drawing of the 6th process which shows 1st Embodiment of the construction method of the construction method of this invention. It is explanatory drawing of the 7th process which shows 1st Embodiment of the construction method of the construction method of this invention. It is explanatory drawing of the 8th process which shows 1st Embodiment of the construction method of the construction method of this invention. It is explanatory drawing of the 9th process which shows 1st Embodiment of the construction method of the construction method of this invention. It is explanatory drawing of the 10th process which shows 1st Embodiment of the construction method of the construction method of this invention. It is explanatory drawing of the 11th process which shows 1st Embodiment of the construction method of the construction method of this invention. It is explanatory drawing of the 12th process which shows 1st Embodiment of the construction method of the construction method of this invention. It is explanatory drawing of the 13th process which shows 1st Embodiment of the construction method of the construction method of this invention. It is explanatory drawing of the 14th process which shows 1st Embodiment of the construction method of the construction method of this invention. It is explanatory drawing of the 15th process which shows 1st Embodiment of the construction method of the construction method of this invention. It is explanatory drawing of the 16th process which shows 1st Embodiment of the construction method of the construction method of this invention. It is explanatory drawing of the 17th process which shows 1st Embodiment of the construction method of the construction method of this invention. It is explanatory drawing of the 18th process which shows 1st Embodiment of the construction method of the construction method of this invention. It is explanatory drawing of the 19th process which shows 1st Embodiment of the construction method of the construction method of this invention. It is explanatory drawing of the 20th process which shows 1st Embodiment of the construction method of the construction method of this invention. It is explanatory drawing of the 21st process which shows 1st Embodiment of the construction method of the construction method of this invention. It is explanatory drawing of the 5th process which shows 2nd Embodiment of the construction method of the construction method of this invention. It is explanatory drawing of the 6th process which shows 2nd Embodiment of the construction method of the construction method of this invention. It is explanatory drawing of the 7th process which shows 2nd Embodiment of the construction method of the construction method of this invention. It is explanatory drawing of the 8th process which shows 2nd Embodiment of the construction method of the construction method of this invention. It is explanatory drawing of the 9th process which shows 2nd Embodiment of the construction method of the construction method of this invention. It is explanatory drawing of the 10th process which shows 2nd Embodiment of the construction method of the construction method of this invention. It is explanatory drawing of the 11th process which shows 2nd Embodiment of the construction method of the construction method of this invention. It is explanatory drawing of the 12th process which shows 2nd Embodiment of the construction method of the construction method of this invention. It is explanatory drawing of the 13th process which shows 2nd Embodiment of the construction method of the construction method of this invention. It is explanatory drawing of the 14th process which shows 2nd Embodiment of the construction method of the construction method of this invention. It is explanatory drawing of the 15th process which shows 2nd Embodiment of the construction method of the construction method of this invention. It is explanatory drawing of the 16th process which shows 2nd Embodiment of the construction method of the construction method of this invention. It is explanatory drawing of the 17th process which shows 2nd Embodiment of the construction method of the construction method of this invention. It is explanatory drawing of the 18th process which shows 2nd Embodiment of the construction method of the construction method of this invention. It is explanatory drawing of the 19th process which shows 2nd Embodiment of the construction method of the construction method of this invention. It is explanatory drawing of the 20th process which shows 2nd Embodiment of the construction method of the construction method of this invention. It is explanatory drawing of the 21st process which shows 2nd Embodiment of the construction method of the construction method of this invention. It is explanatory drawing of the 22nd process which shows 2nd Embodiment of the construction method of the construction method of this invention. It is explanatory drawing of the 23rd process which shows 2nd Embodiment of the construction method of the construction method of this invention. It is explanatory drawing of the 24th process which shows 2nd Embodiment of the construction method of the construction method of this invention. It is explanatory drawing of the 25th process which shows 2nd Embodiment of the construction method of the construction method of this invention. It is explanatory drawing of the 26th process which shows 2nd Embodiment of the construction method of the construction method of this invention. It is explanatory drawing of the 27th process which shows 2nd Embodiment of the construction method of the construction method of this invention.

1 ... existing building 2 ... Yamadome 3 ... excavation / pile construction 4 ... foundation beam 5 ... temporary support column (with jack) 6 ... existing column 7 ... old B1F floor 8 ... floor and beam 9 of new BlF ... temporary column 10 ... pillar (本 設)
11 ... Temporary support (with jack) = 5 12 ... Existing pillar 17 ... Old 1F floor 18 ... Floor and beam 19 of new 1 F ... Temporary support (with jack) = 5, 11
21 ... pillar (main construction) 22 ... pillar (main construction)
27 ... Old 2F floor 28 ... New 2F floor and beams

Claims (3)

This construction method involves dismantling the existing building and constructing a new one at the same time,
As procedure of rebuilding method to rebuild existing building sequentially from lower floor to upper floor,
(1) Supported by jacked temporary support in specific 2 levels (n floor and n + 1 floor) of existing building,
(2) Dismantle the pillars of the nth floor and the n + 1st floor,
(3) Jack down the existing n + 1 floor to a predetermined level,
(4) Construct pillars of the nth floor and construct new floors and beams of the n + 1st floor on the existing floor of the n + 1st floor,
(5) We install temporary support to support n + 2 floor on new floor of n + 1 floor,
(6) Disassemble the existing floor on the (n + 1) th floor and remove the jacked temporary support on the nth floor.
(7) Supported by the temporary post with jack at the existing n + 2 floor,
(8) Install a temporary post with jack on the floor of floor n + 1 and remove the temporary post, and disassemble the post on floor n + 2,
Thereafter, the steps of (3) to (8) are repeated. This construction method involves dismantling the existing building and constructing a new one at the same time,
As procedure of rebuilding method to rebuild existing building sequentially from lower floor to upper floor,
(1) We support by temporary support in specific two levels (n floor and n + 1 floor) of existing building,
(2) Dismantle the pillars of the nth floor and the n + 1st floor,
(3) Construct new floors and beams on the n + 1 floor above the existing floor on the n + 1 floor,
(4) We install temporary supporting pillar supporting new floor, beam of the n + 1 floor on the n floor,
( 5 ) Dismantle the existing n + 1 floor,
( 6 ) Install a temporary post with jack on the floor of the new n + 1 floor, and remove the temporary post supported by the existing n + 1 floor,
(7) supported by the provisional設支pillars Te existing n + 2 floor smell,
( 8 ) Jack down the floor of the new n + 1 floor to a predetermined level,
( 9 ) Build a pillar on the nth floor,
( 10 ) Remove the temporary support of the nth floor.
Thereafter, the construction method characterized by repeating the steps (3) to ( 10 ).   The construction method according to claim 1 or 2, wherein the existing n + 1 floor is used as a gantry to construct a new floor and beam of the n + 1 floor on the existing n + 1 floor.

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