JP7229857B2 - building construction method - Google Patents

Description

TECHNICAL FIELD The present invention relates to a method of constructing a building in which the outer peripheral side of the building is made of reinforced concrete and the inner side of the building is made of steel.

Patent Literature 1 discloses that, in a construction method for a building whose outer peripheral side is made of reinforced concrete, a PCa column member made of precast concrete, with a plurality of layers as one section, is installed on the outer peripheral side of the building.

Japanese Patent No. 3120105

In the technique of Patent Document 1, the number of pieces of the PCa column member can be reduced by using one node for multiple layers, and the number of work steps during erection can be reduced, but the posture of the long and heavy PCa column member during erection is difficult to stabilize, so there is a problem that the work time is required more than the time assumed from the work man-hours.

In view of this situation, the main object of the present invention is to provide a building construction method that can efficiently install the PCa column members in a short working time while reducing the number of PCa column member pieces.

A first characteristic configuration of the present invention is a building construction method in which the outer peripheral side of the building is made of reinforced concrete and the inner side of the building is made of steel,
After installing a steel-framed S-column member on the inside of the building, while connecting to the S-pillar member via a steel-framed S-beam member, a PCa column member made of precast concrete with multiple stories as one node is installed. The point is that it is installed on the outer peripheral side of the building.

According to this configuration, the building is constructed of reinforced concrete on the outer peripheral side of the building and steel on the inner side of the building. While connecting to the S column member via a steel-framed S beam member, a PCa column member with one node (one piece) for multiple stories is installed on the outer peripheral side of the building. Therefore, it is possible to install the PCa column member in a form that stabilizes the posture of the PCa column member with a plurality of floors as one node by utilizing the S column member on the inside of the building as a support member. Therefore, it is possible to efficiently install the PCa column members in a short working time while reducing the number of pieces of the PCa column members.

A second characteristic configuration of the present invention is that the number of layers of one node of the S column member is configured to the number of layers of a plurality of nodes of the PCa column member.

According to this configuration, the number of layers of one section of the S column member, which is installed in advance, is the number of layers of multiple sections of the PCa column member that is installed later, so one section (one) of S Efficiency of the work can be improved in the form of installing a plurality of joints (plural pieces) of PCa column members for the installation of the column members.

A third characteristic configuration of the present invention is that the outer peripheral beams on the outer peripheral side of the building are composed of PCa beam members made of precast concrete,
At the column-to-beam joints of the upper and lower intermediate layers of the PCa column member, the side surface portion of the intermediate portion of the PCa column member and the end portion of the PCa beam member are joined,
At the column-to-beam joint of the upper end layer of the PCa column member, the lower surface portion of the intermediate portion of the PCa beam member and the upper end portion of the PCa column member are joined.

According to this configuration, at the column-to-beam joints of the upper and lower intermediate layers of the PCa column member, the side surface portion of the intermediate portion of the PCa column member and the end portion of the PCa beam member are joined by a so-called column connection method. At the column-to-beam joint on the upper floor of the PCa column member, the lower surface of the intermediate portion of the PCa beam member and the upper end portion of the PCa column member can be joined by a so-called beam-through method. Therefore, it is possible to efficiently construct a column-beam frame on the outer peripheral side of the building having PCa column members made of precast concrete, each section of which corresponds to a plurality of floors.

Longitudinal cross section of main part of building A diagram schematically showing the construction method of a building A diagram schematically showing the construction method of a building A diagram schematically showing the construction method of a building A diagram schematically showing the construction method of a building

An embodiment of a building construction method of the present invention will be described based on the drawings.
FIG. 1 schematically shows a longitudinal section of a main part of a building B constructed by this construction method. 2 to 5 are diagrams showing each step of this construction method, (a) schematically showing a region including the building outer peripheral side 1 and the building inner side 2 in a side view, and (b) Only the building outer peripheral side 1 is schematically represented in a front view. In each figure, the reinforced concrete structure is shown in gray.

As shown in FIG. 1, in the upper part indicated by the solid line, the building B has an outer peripheral side 1 of reinforced concrete construction and an inner building side 2 of steel construction.
The building outer peripheral side 1 is provided with outer peripheral columns 11 made of reinforced concrete and outer peripheral beams 12 made of reinforced concrete that connect the adjacent outer peripheral columns 11 to each other.
The building interior side 2 includes steel-framed internal columns 21, steel-framed first internal beams 22 connecting adjacent internal columns 21, and steel-framed second beams 22 connecting the internal columns 21 and the outer peripheral columns 11. and an internal beam 23 of

As shown in FIGS. 5(a) and 5(b), the outer pillars 11 are composed of PCa pillar members 11A made of precast concrete, each of which has two layers (an example of a plurality of layers) as one section.
The outer peripheral beam 12 is composed of a first PCa beam member 12A and a second PCa beam member 12B made of precast concrete.

The internal pillar 21 is composed of an S pillar member 21A made of a steel frame having one node for four layers (an example of multiple layers). In this embodiment, the number of layers of one node of the S column member 21A is configured to the number of layers of two nodes (an example of multiple nodes) of the PCa column member 11A.
The first internal beam 22 is composed of a first S-beam member 22A made of steel, and the second internal beam 23 is composed of a second S-beam member 23A made of steel.

Then, in constructing the upper part of the building B constructed in this way, in this construction method, in order to improve the efficiency of the work, the S column member 21A having 4 floors as one section is installed on the inner side 2 of the building. After installation, the PCa column member 11A having one node for two floors is installed on the outer peripheral side 1 of the building while being connected to the S column member 21A via the second S beam member 23A.

Each step of the construction method will be described below with reference to FIGS. 2 to 5. FIG. Although the detailed explanation is omitted, the steel-framed S members 21A, 22A and 23A are specifically joined together by various known methods such as bolt joining and welding. As a specific method for joining the 12Bs, various known methods are used, such as filling the periphery with grout, concrete, or the like while reinforcing bars are laid.

First, as shown in FIG. 2(a), on the building interior side 2, a steel-framed S-column member 21A having four floors as one section is installed, and a first S-beam member 22A is installed to form a plurality of The S column members 21A of the book are connected to each other. In the illustrated example, the first S-beam member 22A is installed on the lower two layers of the first floor K1 and the second floor K2, and the first S-beam is connected between the lower two-layer portions of the plurality of S-column members 21A. They are connected by a member 22A.

Then, as shown in FIGS. 2(a) and 2(b), a PCa column member 11A having two sections as one section is installed on the outer peripheral side 1 of the building, and as shown in FIG. 3(a), , a second S beam member 23A is installed on the first floor K1 to connect the PCa column member 11A to the S column member 21A. That is, the PCa column member 11A is installed on the outer peripheral side 1 of the building while being connected to the S column member 21A via the second S beam member 23A.

At this time, a steel frame bracket b for connecting the second S beam member 23A is embedded and fixed in the intermediate portion (the intermediate portion in the longitudinal direction) of the PCa column member 11A. Therefore, the second S beam member 23A is installed in such a manner that one end thereof is joined to the S column member 21A and the other end thereof is joined to the bracket b of the PCa column member 11A.

Also, as shown in FIGS. 3(a) and 3(b), the first PCa beam member 12A is installed on the first story K1, and the intermediate portions of the adjacent PCa column members 11A are connected.
The first PCa beam member 12A is configured as a member that constitutes the outer peripheral beam 12 for one span between the adjacent outer peripheral columns 11 . Therefore, at the column-to-beam joint of the first floor K1 (an example of the upper and lower intermediate floors) of the PCa column member 11A, the side surface of the intermediate portion of the PCa column member 11A and the end of the first PCa beam member 12A are joined. The PCa column member 11A and the first PCa beam member 12A are joined by a so-called column connection method.

Next, as shown in FIGS. 4(a) and 4(b), the second PCa beam member 12B is installed on the second story K2, and the upper ends of the adjacent PCa column members 11A are connected. Furthermore, on the second story K2, a second S beam member 23A is installed to connect the PCa column member 11A to the S column member 21A.

The second PCa beam members 12B are composed of the outer peripheral beams 12 for one span between the adjacent outer peripheral columns 11 and part (long (approximately half in the longitudinal direction). Therefore, at the column-to-beam joint of the second story K2 (an example of the upper end story) of the PCa column member 11A, the lower surface of the middle part of the second PCa beam member 12B and the upper end of the PCa column member 11A are joined. The PCa column member 11A and the second PCa beam member 12B are joined by a so-called beam passing method.

In this embodiment, the portion of the second PCa beam member 12B corresponding to the outer pillar 11 has the same cross section as the PCa pillar member 11A, and is configured to extend slightly downward from the bottom of the outer peripheral beam 12. be done. A steel-frame bracket b for connecting the second S-beam member 23A is embedded and fixed in a portion of the second PCa beam member 12B corresponding to the outer peripheral column 11. As shown in FIG. Therefore, the second S-beam member 23A of the second story K2 has one end joined to the S-column member 21A and the other end joined to the bracket b of the second PCa beam member 12B. Installed.

After that, as shown in FIGS. 5(a) and 5(b), in the upper two layers of the third story K3 and the fourth story K4, the first S beam members 22A are formed in the same procedure as the lower two layers. , a PCa column member 11A, a second S beam member 23A, a first PCa beam member 12A, and a second PCa beam member 12B, each of which has two floors as one section, are installed respectively, and from the first floor K1 of the building B The construction work for each four layers up to the fourth layer K4 is completed.
After that, the construction work for each of the four floors is successively repeated upward to build up to the highest floor of the building B.

In this way, in this construction method, the PCa column member 11A is installed in such a manner that the posture of the PCa column member 11A, which has a section corresponding to a plurality of floors, is stabilized by utilizing the S column member 21A on the building interior side 2 as a support member. can do. Therefore, it is possible to efficiently install the PCa column members 11A in a short working time while reducing the number of pieces of the PCa column members 11A.
Moreover, since the layer number of one node of the S column member 21A, which is installed in advance, is the number of layers for a plurality of nodes of the PCa column member 11A, which is installed subsequently, one node (one) S column member The efficiency of the work can be improved by installing a plurality of joints (plural pieces) of PCa column members 11A with respect to the installation of 21A.

[Another embodiment]
Another embodiment of the present invention will be described. It should be noted that the configuration of each embodiment described below is not limited to being applied alone, and can be applied in combination with the configurations of other embodiments.

(1) In the above-described embodiment, the PCa column member 11A made of precast concrete has been shown as an example in which one node is configured for two layers, but it may be configured as one node for three layers or more. In addition, the S column member 21A made of steel. Although a case where one node is composed of four layers is shown as an example, two layers, three layers, five layers or more may be configured as one node.

(2) In the above embodiment, the number of layers of one node of the S column member 21A was exemplified by the number of layers of two nodes of the PCa column member 11A, but three or more nodes of the PCa column member 11A or the number of layers corresponding to one joint of the PCa column member 11A.

B Building 1 Building outer side 2 Building inner side 11A Member 11A PCa column member 12 Perimeter beam 12A First PCa beam member 12B Second PCa beam member 21A S column member 22A First S beam member 23A Second S beam Element

Claims (3)

A construction method for a building in which the outer peripheral side of the building is made of reinforced concrete and the inner side of the building is made of steel,
After installing a steel-framed S-column member on the inside of the building, while connecting to the S-pillar member via a steel-framed S-beam member, a PCa column member made of precast concrete with multiple stories as one node is installed. A construction method for a building to be installed on the outer peripheral side of the building. 2. The method of constructing a building according to claim 1, wherein the number of layers of one section of the S column member is the number of layers of a plurality of sections of the PCa column member. The outer peripheral beams on the outer peripheral side of the building are composed of PCa beam members made of precast concrete,
At the column-to-beam joints of the upper and lower intermediate layers of the PCa column member, the side surface portion of the intermediate portion of the PCa column member and the end portion of the PCa beam member are joined,
3. The method of constructing a building according to claim 1 or 2, wherein a lower surface portion of an intermediate portion of said PCa beam member and an upper end portion of said PCa column member are joined at a column-to-beam joint on the upper floor of said PCa column member. .

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