JPH03197734A - Lift up method by replacement of scaffold body - Google Patents

Abstract

PURPOSE:To reduce the cost by a method wherein a column is built simultaneously with a scaffold framing, a lift up, and a slab work, and the slab work is executed in delay by one floor behind the column building work. CONSTITUTION:A column body or a core 1 having height to a second floor is built, and a support tool 3, e.g. a rod equalizer jack, is locked to the upper end of the column body or the core through a support rest 4. A scaffold body 6 is supported by a temporary support rest 7 locked to the core 1 for framing. A lift up jack 9 is brought into contact with the under surface of the scaffold body, and the rest 7 and the scaffold 6 are lifted up to a second floor through a step up rod 2 of the support tool 3. By using a crane 11 on the scaffold 6, a core 12 for a third floor is built, and a second floor slab is built. In the following, after construction is executed in a similar manner described above to a desired floor, the upper end of the core is coupled to the scaffold 2, and thereafter a roof floor slab is constructed. Thus, the more a floor is higher, the more a term of works is comparatively shortened.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a lift-up construction method for constructing a multi-layered structure such as a steel-framed concrete structure by replacing the scaffolding frame.

[Conventional technology]

Conventionally, in order to carry out the lift-up method on a multi-story structure made of reinforced concrete or steel-framed reinforced concrete, the first step is to construct a steel-framed column. The construction of the column frame 22 is completed by erecting reinforcing bars and pouring concrete. In this case, the roof slab steel beams 23 are assembled during construction of the third floor column frame 22, and at the same time wire rope fixing fittings 25 are installed on the steel beam connecting steel frame 24 provided at the top of the column frame 22. 26
is fixed, and the other end engages with a jack 27 on the lower side of the roof slab steel beam 23. Next, as shown in FIG.
After lifting up to the top of the slab 2 and connecting it with the steel beam connecting steel frame 24, the second floor slab formwork 2 is lifted up as shown in Figure 1).
8 (indicated by dotted lines), erected reinforcing bars, poured concrete, and constructed 8 slabs 291i (Figure 12). At the same time, partitions, etc. were also installed, and then, as shown in Figure 12, the 3rd floor , the fourth floor slab framework 30, 31, partitions, etc. were to be constructed.

As shown in FIG. 8, the above process involves assembling the rooftop slab steel beams before completing the construction of the columnar framework, lifting them up to the top floor, and then constructing the slab framework for the second floor or higher.

[Problem to be solved by the invention]

In the conventional lift-up method described above, the top floor of the column frame is used as a reaction force support when lifting the rooftop slab steel beam with jacks, so it is necessary to first complete the entire column frame, as shown in Figure 8. After lifting up the roof slab steel beams using the completed column frames as reaction supports, we will begin constructing the slab frames and partitions on the second floor and above, so we will perform column frame construction, roof slab steel beam assembly, and lift-up. The construction work, as well as the slab frame work and partition work on the second floor and above, are carried out in series, and the next work cannot be started until one work is completed, so the overall construction period becomes longer as the number of floors increases.

It is an object of the present invention to provide a lift-up construction method that eliminates this drawback and allows the entire construction period to be significantly shortened by performing each construction work in parallel.

[Means to solve the problem]

In order to solve the above-mentioned problems, this invention sequentially lifts up the scaffolding frame assembled on the ground to the upper floor and repositioning it in parallel with the construction of the pillar frame or core, and then sequentially builds the slab frame on the upper floor in the space after the relocation. The purpose of this project is to use a lift-up construction method that involves replacing the scaffolding structure so that the construction of the scaffolding is possible.

〔Example〕

Embodiments of the invention will be described with reference to the drawings.

Figures 1 to 6 show the construction of a four-story steel-framed reinforced concrete structure using the improved lift-up method. Construction concrete is poured to construct the columns for the first and second floors (referred to as the column frame in this specification) or a wall body containing multiple columns (referred to as the core in this specification) 1, and the column frame is constructed. Alternatively, on the upper part of the second floor of the core 1, a locking fitting 5 for locking the support 3 such as a rod equalizer jack at the upper end of the step rod 2 shown in FIG. At the bottom of the first floor, the roof slab/scaffolding steel beam (referred to as the scaffolding frame in this specification) 6 is temporarily supported as shown in Fig. The scaffolding frame 6 is assembled into the ground, a lift-up jack 9 is brought into contact with the lower surface of the scaffold, and the upper support is inserted into the lift-up jack 9 from the support 3 on the stand 4, and the temporary support is placed on the stand 7. is rearranged so that it is locked to a locking fitting 8 fixed to the column frame or core 1 below the second floor, and as shown in Fig. 2, the support above the column frame or core supports the platform 4 by reaction force. The scaffolding frame 6 is lifted up to the platform 7 for temporary support on the second floor using the lift-up jack 9, and then the formwork for the slab, partition, etc. on the second floor (in this specification, a slab type After assembling the frame 10, as shown in Figure 3, the crane 1) on the scaffolding frame 6 is used to erect the steel frame of the column frame or core 12 on the third floor, reinforcing bars are erected, and concrete is poured. Then, the third floor column frame or core 12 is constructed, a rail 13 is erected under the scaffolding frame 6, a hoist 14 is suspended, reinforcing bars are laid in the slab formwork 10 using the hoist 14, and concrete is poured. A slab, partition, etc. (hereinafter referred to as a slab frame in the specification) 15 for the second floor is constructed.

Next, for the temporary support, place the stand 7a on the column frame or core 1 on the third floor.
2, the scaffolding frame 6 is attached to the pillar frame or the support above the core 12 is placed on the platform 4, as shown in FIG.
3 using lift-up jack 9 as a reaction force support.
The temporary support for the floor is lifted up to the platform 7a and repositioned, and after assembling the third floor slab formwork 16, the column frame or core 17 for the fourth floor is connected to the column frame or core for the third floor, as shown in Fig. 5. Constructed in the same manner, the scaffolding frame 6 was lifted up using a lift-up jack 9 to the position of the steel beam connecting steel frame 18 provided at the upper end of the fourth floor, and then replaced and the reinforcing bars were installed in the slab formwork 16 on the third floor. 3rd floor slab frame 19 after pouring concrete
After constructing the slab formwork 20 for the fourth floor, as shown in Fig. 6, reinforcing bars are laid in the slab formwork 19 and concrete is poured to construct the slab frame 21, and then the scaffolding frame is constructed. 6 and the steel frame 18 for connecting steel beams, erect reinforcing bars in the scaffolding frame 6, pour concrete, and construct a slab frame (in this case, a flat roof) 22 to complete a four-story steel reinforced concrete structure. do.

The process diagram for this example is shown in Figure 8, and shows the first and second floors.
During the construction of the pillar frame or core of the first floor, the scaffolding frame is assembled into the ground, lifted up to the second floor and repositioned to construct the third floor column frame or core, and in parallel with this, the second floor slab is constructed. Build the frame, then move the scaffolding frame to the 3rd floor, construct the 3rd floor slab frame in parallel while constructing the 4th floor pillar frame or core, and then move the scaffolding frame to the 4th floor. Since the slab frame for the fourth floor will be constructed using the same method, all construction work can be completed with only one floor delay in constructing the slab frame after the completion of the pillar frame or core construction.

〔Effect of the invention〕

This invention enables the construction of the slab frame for one floor to be delayed compared to the construction of the column frame or core of the structure by performing the construction of the column frame or core, the scaffolding frame assembly and lift-up work, and the slab frame work in parallel. Since all the main parts of the structure can be completed in just one step, compared to the conventional lift-up method in which each work is done in series, the higher the structure, the shorter the overall construction period, which reduces construction costs. I can do it.

[Brief explanation of drawings]

Figures 1 to 6 are for explaining the construction method of the embodiment of the present invention, and are partially cutaway front views showing the outline of the structure, etc., and Figure 7 is an enlarged view of the pedestal and temporary pedestal portions. 8 is a process diagram, and FIGS. 9 to 12 are partially cutaway front views showing the outline of the structure, respectively, for explaining the conventional construction method.

Claims (1)

[Claims] 1. In parallel with the construction of the pillar frame (1), the scaffolding frame (6) assembled on the ground is sequentially lifted up to the upper floor and repositioned, and the slabs of the upper floor are sequentially constructed in the space after the repositioning. Body (15), (19), (
21) Lift-up construction method by replacing the scaffolding frame. 2. In the lift-up construction method by replacing the scaffolding frame according to claim 1, instead of constructing the column frame (1), the core (1)
) is a lift-up construction method that involves replacing the scaffolding structure.