JP2021188318A - Building construction method - Google Patents

Abstract

To provide a building construction method which can effectively avoid post-construction jobs for cranes such as temporary openings and reduce the work and time for preliminary construction of the steel structure of the building frame and shorten the construction period by constructing the steel structure of the building frame in advance and installing stationary cranes on top of it.SOLUTION: A construction method of a building with a multi-story building frame 1 includes a preceding process for constructing a steel structure part 20A of an SRC part 20 which is an SRC structure from the lower floor side to the upper floor side in a part of a plan view of the building frame 1 and a follow-up process in which a stationary crane K is installed on the top of the steel structure part 20A of the SRC part 20 constructed in the preceding process to construct the remaining part of the building frame 1.SELECTED DRAWING: Figure 2

Description

The present invention relates to a method for constructing a building having a multi-story building frame.

When constructing a building with multiple layers under construction conditions where it is not possible to secure a space for installing a crane around the building frame on the site, a climbing crane is installed on the lower layer side of a part of the plan view of the building frame. It is common to build a skeleton. In this case, when constructing the slabs on each floor, a temporary opening for climbing is formed by the climbing type crane, and the building frame is constructed from the lower layer side to the upper layer side while climbing the crane.
However, the temporary opening for the crane formed in the slab on each floor will remain until the crane is removed by constructing it up to the upper layer side of the building frame, and the closed part that closes the temporary opening with reinforced concrete will remove the crane. It has the harmful effect of prolonging the construction period as it becomes a post-construction part to be constructed later.

In this regard, in Patent Document 1, the entire plan view of the multi-story building frame is defined as an SRC portion of SRC structure (steel reinforced concrete structure) or an S structure portion of S structure (steel frame structure) from the lower layer side to the upper layer side. When constructing a building, the entire SRC part or the steel structure part of the S structure part in the plan view of the building frame is constructed in advance, and a stationary crane is installed on the upper part (rooftop) of the steel structure part to install the building frame. Techniques have been proposed to build the rest of the.

Japanese Unexamined Patent Publication No. 2000-226187

According to the building construction method described in Patent Document 1, since a stationary crane is installed on the upper part of the steel structure portion of the building frame previously constructed, a temporary opening for a climbing crane is formed in the slab of each floor. It is not necessary, and it is possible to avoid the occurrence of a post-construction part such as a closed part of a temporary opening for a crane.
However, at the timing before the installation of the crane, the steel structure part is constructed from the lower layer side to the upper layer side in the entire plan view of the multi-story building frame, so it takes time and effort to construct the steel frame structure part. Therefore, there is a problem that the construction period cannot be effectively shortened.

In view of this situation, the main problem of the present invention is to construct the steel structure part of the building frame in advance and install a stationary crane on the upper part to generate a post-construction part for the crane such as a temporary opening. The point is to provide a building construction method that can effectively shorten the construction period by reducing the labor and time for the advance construction of the steel structure part of the building frame while avoiding the above.

The first characteristic configuration of the present invention is a method for constructing a building having a multi-story building frame.
The preceding process of constructing the steel structure part of the SRC part, which is an SRC structure from the lower layer side to the upper layer side in a part of the plan view of the building frame,
A subsequent step of installing a stationary crane on the upper part of the steel structure portion of the SRC portion constructed in the preceding step and constructing a portion located around the SRC portion in a plan view of the building frame is provided. At the point.

According to this configuration, in the preceding process, the steel frame construction work of the SRC part of the SRC structure is carried out from the lower layer side to the upper layer side in a part of the plan view of the building frame to construct the steel frame structure part of the SRC part. Since the SRC portion extending from the lower layer side to the upper layer side is a part of the plan view of the building frame, it can be constructed with less effort and time. In addition, it is possible to carry out the construction work using the space around the SRC portion in the site.
Next, in the subsequent process, by installing a stationary crane on the upper part of the steel structure part of the SRC part extending from the lower layer side to the upper layer side, it is higher than the part located around the SRC part in the plan view of the building frame. Install a crane at the position.
Then, using the crane installed at the high position, it is possible to construct a portion located around the SRC portion in a plan view of the building frame.
Therefore, it is possible to effectively shorten the construction period by reducing the labor and time for pre-construction of the steel structure part of the building frame while avoiding the occurrence of the post-construction part for the crane such as the temporary opening.

The second characteristic configuration of the present invention is that the SRC portion is redesigned from an RC structure to an SRC structure prior to constructing the building frame.

According to this configuration, SRC for installing a stationary crane by changing the design of a part of the plan view of the building frame, which is the RC structure in the original design, to the SRC structure on the safety side in terms of earthquake resistance, etc. A part can be created, and even if the SRC part for installing a stationary crane does not exist in the original design, the preceding process and the following process can be carried out to effectively shorten the construction period.

In the third characteristic configuration of the present invention, the SRC portion includes a main steel frame staircase.
The point is to construct the main steel staircase in the preceding process.

According to this configuration, since the main steel stairs included in the SRC part are constructed in the preceding process, the rest of the building frame is constructed in the subsequent process using the main steel stairs without installing temporary stairs. Can be constructed, and the subsequent process can be carried out efficiently.

In the fourth characteristic configuration of the present invention, the SRC portion includes a main elevator shaft.
The main elevator shaft is constructed in the preceding process, and the main elevator shaft is constructed.
The point is that the main elevator is installed on the main elevator shaft to carry out the subsequent process.

According to this configuration, the main elevator shaft included in the SRC part is constructed in the preceding process, and the main elevator is installed on the main elevator shaft to carry out the subsequent process. Therefore, the temporary elevator shaft and the temporary elevator can be used. The remaining part of the building skeleton can be constructed in the follow-up process using the main elevator without installation, and the follow-up process can be carried out efficiently.

Elevation showing how to build a building Elevation showing how to build a building Elevation showing how to build a building Plan view showing the arrangement of the core part

An embodiment of a building construction method according to the present invention will be described with reference to the drawings.
As shown in FIG. 3, the building constructed by the construction method of the present building (hereinafter, may be simply referred to as the present construction method) is configured as a building having a multi-story building frame 1. The building frame 1 is composed of a foundation 2, columns 3 and beams 4 supported by the foundation 2, slabs (not shown), and the like.

The building frame 1 is mainly made of RC structure (reinforced concrete structure), and the entire lower floor portion 10 (the portion below the second floor structure in the illustrated example) and, as shown in FIGS. 3 and 4, are shown. The core portion 20 (corresponding to the SRC portion) extending from the lowest floor on the lower layer side to the uppermost floor on the upper layer side in a part of the plan view is made of SRC structure, and the other part 30 is made of RC structure.

The core portion 20 is where equipment space, seismic elements, etc. are centrally arranged, and inside it, a main steel staircase 5 and a main elevator shaft extending from the lowest floor on the lower layer side to the uppermost floor on the upper layer side. 6 etc. are included. The main elevator shaft 6 is a space that penetrates the slabs of each floor in the core portion 20 and extends from the lowermost floor on the lower layer side to the uppermost floor on the upper layer side.

The lower floor part 10 and core part 20 of the SRC structure were originally made of RC structure in the original design, but in order to implement this method in the construction plan to be carried out prior to the construction of the building frame 1. The design was changed from RC structure to SRC structure. In this construction method, by utilizing the design change and carrying out the preceding process and the following process, which will be described later, in order, it is not possible to secure a crane installation space and a material carry-in route around the building frame 1 in the site S. Even under the conditions, the building frame 1 can be efficiently constructed in a short construction period. Hereinafter, each step of this method will be described in order.

(Preceding process)
As shown in FIG. 1, in the preceding process, after the foundation 2 is constructed, the steel frame construction work of the core portion 20 of the SRC structure is carried out, and the steel structure portion 20A of the core portion 20 is constructed on the foundation 2. The steel structure portion 20A of the core portion 20 extends from the lowest floor to the top floor, and is configured by assembling a large number of column steel frames 3a and a large number of beam steel frames 4a.
As shown in FIG. 4, the core portion 20 of the SRC structure is a part of the plan view of the building frame 1, so that it can be constructed with less effort and time. Further, the construction work of the steel frame structure portion 20A of the core portion 20 can be performed by utilizing the space around the core portion 20 in the site S.

At this time, the main steel frame stairs 5 and the main elevator shaft 6 included in the core portion 20 are also constructed. By installing the main steel frame stairs 5 at such an early timing, it is possible to carry out the subsequent construction using the main steel frame stairs 5 without installing the temporary stairs.

Further, in the present embodiment, as shown in FIG. 1, the steel frame construction work of the lower floor portion 10 of the SRC structure is carried out, and the steel structure portion 10A of the lower floor portion 10 is constructed on the foundation 2. The steel structure portion 10A of the lower floor portion 10 is also configured by assembling the column steel frame 3a and the beam steel frame 4a.
By constructing the steel structure portion 10A of the lower floor portion 10 of the SRC structure, the foot side of the steel structure portion 20A of the core portion 20 having the heights of a plurality of floors can be firmly fixed, and the core portion 20 can be firmly fixed. The steel structure portion 20A can be further stabilized.
The steel frame structure portion 10A of the lower floor portion 10 is constructed by using the crane K after installing a stationary crane K on the steel frame structure portion 20A of the core portion 20 in a subsequent process described later. You may.

(Following process)
In this subsequent step, as shown in FIG. 2, first, a stationary crane K is installed on the upper part of the steel structure portion 20A of the core portion 20 constructed in the preceding step.
The stationary crane K is installed on, for example, a plurality of receiving beams k1 extending between the beam steel frames 4a on the uppermost floor of the steel frame structure portion 20A of the core portion 20 and the plurality of receiving beams k1. It can be installed on the upper part of the steel frame structure portion 20A of the core portion 20 by such a method.
By the way, as shown in FIG. 4, the core portion 20 can have a shape that does not easily fall, such as an L-shape in a plan view, and the stationary crane K has a center of gravity position on the upper surface of the steel frame structure portion 20A of the core portion 20. Etc. are placed.

Further, the main elevator 7 is installed in the steel structure portion 20A of the core portion 20 at an appropriate timing such as in the middle of the subsequent process. By installing the main elevator 7 at such an early timing, it is possible to carry out the subsequent construction using the main elevator 7 without installing the temporary elevator. The main elevator 7 is composed of an elevator cage 7A arranged in the main elevator shaft 6, an elevating device (not shown) for raising and lowering the elevator cage using a rope or the like.

Then, as shown in FIGS. 2 and 3, a stationary crane K installed on the upper part of the steel structure portion 20A of the core portion 20, and a main steel staircase 5 installed on the steel structure portion 20A of the core portion 20. Reinforcing work, formwork work, and concrete placing work are carried out in order using the main elevator 7, and the rest of the building skeleton 1 including the part located around the core part 20 in the plan view of the building skeleton 1 The parts are constructed in order from the lower layer side to the upper layer side.

Specifically, in the core portion 20 of the SRC structure, building materials and the like are lifted by a stationary crane K, and reinforcing bars and molds are placed around the pillar steel frame 3a and the beam steel frame 4a of the steel structure portion 20A and at the construction location of the slab. By placing concrete after arranging the frame, the SRC pillar 3, beam 4, slab, etc. of the core portion 20 are constructed.

In the lower floor portion 10 of the SRC structure, building materials and the like are lifted by a stationary crane K, and reinforcing bars and formwork are arranged around the pillar steel frame 3a and the beam steel frame 4a of the steel structure portion 10A and at the construction location of the slab. By placing concrete on the top, SRC pillars 3, beams 4, slabs, etc. of the lower floor portion 10 are constructed.
At this time, a suspended formwork supported from the beam steel frame 4a in a suspended state is used as the formwork for forming the SRC beam 4 or the slab of the lower floor portion 10. By doing so, it is possible to eliminate the support work such as the pipe support that supports the formwork from the lower floor that interferes with the material import, and it is possible to appropriately secure the material import route inside the lower floor portion 10. can.

For the RC part 30 other than the core part 20 and the lower floor part 10 of the SRC structure, a stationary crane K is used, and concrete is cast after arranging the reinforcing bars and formwork to form the columns of the RC structure. Build 3, beam 4, slab, etc. Then, when all the construction work is completed, the stationary crane K is removed.

[Another Embodiment]
Other embodiments of the present invention will be described.
It should be noted that the configurations of the respective embodiments described below are not limited to being applied independently, but can also be applied in combination with the configurations of other embodiments.

(1) In the above embodiment, the case where the core portion 20 in which the equipment space and the seismic elements are intensively arranged is used as the SRC portion for installing the stationary crane K at the upper part is shown as an example. A portion of the building frame 1 other than the core portion 20 may be used as an SRC portion for installing the stationary crane K at the upper part.

(2) The parts 10 and 30 other than the SRC part (core part 20) for installing the stationary crane K in the building frame 1 are not limited to the SRC structure and the RC structure shown in the above-described embodiment. Various structures can be adopted.

(3) In the above-described embodiment, the portions 10 and 30 other than the SRC portion (core portion 20) for installing the stationary crane K in the building frame 1 are the SRC structure shown in the above-described embodiment. Not limited to RC construction, various structures can be adopted.

(4) The present invention can be applied to the construction of various high-rise, middle-rise, and low-rise buildings, and in particular, can be suitably applied to the construction of middle-rise and low-rise buildings.

1 Building frame 5 Main steel stairs 6 Main elevator shaft 7 Main elevator 20 Core part (SRC part)
20A Steel structure K Stationary crane

Claims (4)

It is a method of constructing a building with a multi-story building frame.
The preceding process of constructing the steel structure part of the SRC part, which is an SRC structure from the lower layer side to the upper layer side in a part of the plan view of the building frame,
A subsequent step of installing a stationary crane on the upper part of the steel structure portion of the SRC portion constructed in the preceding step and constructing a portion located around the SRC portion in a plan view of the building frame is provided. How to build a building. The building construction method according to claim 1, wherein the SRC portion is redesigned from an RC structure to an SRC structure prior to constructing the building frame. The SRC portion includes the main steel staircase
The building construction method according to claim 1 or 2, wherein the main steel frame staircase is constructed in the preceding step. The SRC portion includes the main elevator shaft.
The main elevator shaft is constructed in the preceding process, and the main elevator shaft is constructed.
The method for constructing a building according to any one of claims 1 to 3, wherein the main elevator is installed on the main elevator shaft and the subsequent process is carried out.

Images