JPH0527744B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" This invention relates to a construction method for rebuilding an existing building into a high-rise building while keeping it in operation.

"Conventional Technology" When rebuilding aging buildings into high-rise buildings in urban redevelopment projects, etc., the existing buildings must be demolished.

``Problems that inventions aim to solve'' However, when rebuilding aging buildings into high-rise buildings that occur during urban redevelopment, etc., issues such as business compensation for tenants and securing a new location during construction are more important than the construction itself. However, the preliminary preparations before the start of construction are complicated and require extremely difficult work, and there are cases where redevelopment work is impossible because the current tenants do not agree to move temporarily. .

This trend is reflected in high value-added office areas in cities,
Alternatively, the larger the area becomes, or the larger the structure, the more tenants there are, and the more negotiation departments there are, the more difficult the work becomes. There are many examples where this is not possible.

"Means for Solving Problems" and "Operation" The present invention was made in view of the above circumstances, and its gist is to
The foundation for the high-rise reconstruction building will be constructed by penetrating a part of the existing building within the plan of the existing building as determined in the summary, and the core part of the building will protrude from the roof of the existing building to a predetermined level. A strong slab work gantry will be assembled on the roof of the building to serve as a work base for the work on the ground floor and a curing frame, and will be connected to the steel frame of the core section via jacks so that it can be lowered, and the steel frame of the core section will be added. At the same time, there is a suspension frame on the work platform, and beams and beams on each floor above the ground.
The floor will be constructed in advance, and the suspension frame and the beams and floors on each floor will be lifted up and fixed, and the exterior and interior work will be completed.The upper floor of the work gantry will be completed and tenants will be relocated. The tenant contractor's plan is to demolish part or all of the existing building, lift down the work platform, fix the lift-down of the beams and floors that were previously constructed, and perform exterior and interior work to construct the lower floor. The key point is that it has made it possible to rebuild aging buildings into high-rise buildings without having to relocate them to another location.

"Example" This will be described in detail below based on the drawings. Figures 1 to 7 show the construction order when the present invention is applied to an eight-story building with a courtyard;
The figure shows a 20-story high-rise reconstruction plan for the building.

In FIG. 8, 1 is an existing building in operation with four courtyards that is planned for high-rise reconstruction, and the virtual line 2 is the building that is planned for high-rise reconstruction.

3 in the figure shows the pine piles supporting the existing building.

Next, the construction order of the building 2 will be explained with reference to FIGS. 1 to 7.

"Figure 1" The roof of building 1 is cured 4 and a jib crane 5 is installed on the roof. Next, after the steel frame work of the core part 6 is completed up to the roof curing gantry level, a tower crane 7 is installed in the core part 6.

The core section 6 referred to here refers to a section that is equipped with the equipment, flow lines, evacuation, and structural functions necessary to operate the newly built section.

``Figure 2'' A work platform 8 is constructed on the roof of the building 1 which is in operation and also serves as a protection. This work platform 8 is connected to the steel frame of the core section 6 via jacks and can be lowered.

"Figure 3" A strong slab that can withstand any falling objects will be built on the work platform 8, and will serve as a curing platform for ultra-safe construction and a work base for ground floor construction. Thus, the work platform 8 serves as a protective platform, material storage area, and construction management base for the safety protection of the existing building 1 below, and construction via this is a feature of the present invention. After completing the construction of such safety protection, two sections of the steel frame for the core section 6 will be erected.
Climb tower crane 7 and prepare for upper floor construction.

"Figure 4" Since all the ground floors have a suspension structure from the core, the beams and floors 9 of each floor are constructed on the work platform 8 in advance, and in the example shown, the suspension of the middle 9 floors is carried out. Build frame 10 thereon.

``Figure 5'' The hanging frames 10 for the middle nine floors are lifted up to a predetermined height and fixed.

After settling, this will be used as a work platform to proceed with the construction of the beams and floors 9' on the upper floor, and the uppermost hanging frame 10' will be constructed on top of it and lifted up to the top floor.

After that, after lifting and fixing the upper floors one by one,
Perform exterior and interior construction.

Such zoning construction can be planned rationally according to the building scale.

"Figure 6" After the roof floor construction is completed, tower crane 7 will be dismantled and the upper floor will be completed. Next, in the illustrated example, the tenants on the 4th to 9th floors of the existing building 1 are relocated to the newly built upper floors, the tenants on the 1st to 3rd floors continue to operate, the 4th floor is used as a curing floor for demolition on the 5th to 9th floors, and the 9th to 9th floors are relocated.
Demolish up to 5F.

Note that, depending on the building, all floors of the existing building 1 may be demolished.

``Figure 7'' After dismantling up to the 5th floor, the lower 7th floor will be completed while lifting down the work platform 8 that had been constructed in advance. After the construction of the lower 7th floor is completed, the tenants on the 1st to 3rd floors will be relocated to the upper floors. After that, the first to third floors will be demolished and the lower three floors will be completed. Work platform 8 will be dismantled and removed.

Therefore, it is possible to rebuild the existing building into a high-rise building while keeping it in operation without requiring the relocation of tenants.

Although the above example is a case where there is a courtyard within the building site, the implementation of the present invention in the case where there is no courtyard is shown in FIG.

In other words, the part 11 of the existing building 1 indicated by the broken line
Only these tenants will be relocated, and only this section will be demolished in advance to secure construction space.

Then, this portion 11 becomes the same as the aforementioned courtyard, and the present invention can be implemented.

Furthermore, the embodiment of the present invention shown in FIG. 10 is for redevelopment where a plurality of buildings are combined into one, and in this case, the road 12 between the existing buildings 1, . . . corresponds to the above-mentioned courtyard. Therefore, construction is possible if the core is constructed in advance by using the portions 13, .

In addition, with the present invention, as long as the construction space for the foundation construction section can be secured, it is possible to renew the building by continuing to operate the building while leaving the current building in its current state and proceeding with new construction work on the upper part.

In addition, one of the construction techniques required to carry out the present invention is to hollow out existing basements and pressure plates in work spaces such as courtyards and construct support piles to support newly constructed buildings. A large number of existing technologies exist, and it is technically possible to cope with this problem.

"Effects of the Invention" As described above, according to the construction method of the present invention, buildings can be rebuilt to become taller without stopping the operation of the existing building, and the concerns of tenants who are afraid of losing customers due to relocation are resolved, and the This can greatly contribute to the promotion of replacement plans.

[Brief explanation of the drawing]

Figures 1 to 7 are construction procedure diagrams of the construction method of the present invention, Figure 8 is a high-rise reconstruction plan diagram according to the present invention, Figure 9,
FIG. 10 is an explanatory diagram of the construction procedure of the present invention under different conditions. 1... Existing building, 2... Building, 3... Pine pile, 4
...Curing, 5...Jib crane, 6...Core section, 7...Tower crane, 8...Work gantry, 9
... Beams/floors, 10... Hanging frames, 11... Parts of existing buildings indicated by broken lines, 12... Roads, 13
...The part of the road indicated by the broken line.

Claims (1)

[Claims] 1 Penetrating a part of the existing building within the plane of one or more existing buildings in operation, and installing the foundation for the high-rise reconstruction building and the core part of the building concerned from the roof of the existing building. It is constructed so that it protrudes to the top, and a curing frame and a strong slab work gantry as a work base for ground floor construction are assembled on the roof of the existing building, and it is connected to the steel frame of the core section via jacks so that it can be lowered. In addition to adding to the steel frame of the core, we also constructed the suspension frame of the suspension structure on the work platform, as well as the beams and floors for each floor above ground. During construction, the upper floor of the work gantry was completed and tenants were relocated.
After that, part or all of the existing building at the bottom of the work gantry will be demolished, the work gantry will be lifted down, and the beams and floors that were previously constructed will be lifted down and fixed, and the exterior and interior work will be carried out to construct the lower floor. A construction method that involves rebuilding an existing building into a high-rise building while keeping it in operation.