JP2629496B2 - Construction method of structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for constructing a structure in which columns and beams are respectively made of reinforced concrete and steel beams.

[0002]

2. Description of the Related Art In recent buildings such as office buildings, columns are often made of a steel-framed reinforced concrete structure and beams are made of a steel-frame structure in accordance with an increase in height. In order to reduce construction costs, it is common practice to use columns with reinforced concrete structures and beams with steel structures.In this case, columns are first constructed on each floor, and then beams are inserted between these columns. It was common to repeat the work of bridging over from the bottom floor to the top floor to build all floors of the building.

[0003]

For this reason, even if the construction of the pillar is completed, the beam cannot be bridged unless the concrete of the pillar has developed sufficient strength. There was an unavoidable issue. On the other hand, in order to shorten the construction period, in order to bridge the beam before the concrete of the column develops sufficient strength, a large number of supports for supporting the beam are required, and a great deal of There was a problem that required a lot of labor.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a method of constructing a structure capable of shortening a construction period, saving labor for construction, and reducing support work. Aim.

[0005]

According to a construction method of a structure according to the present invention, a main reinforcement and a hoop reinforcement of a column are assembled over a plurality of floors in a method of constructing a structure in which columns and beams are respectively made of reinforced concrete and steel beams. The beam joints for joining the ends of the steel beams to the beam joints on each floor of the main reinforcement are respectively attached to the main reinforcements with fixing nuts, and then from a plurality of steel forms around the main reinforcements and the hoop reinforcements. Assemble the column-building formwork over a plurality of floors, and then bridge the steel beams of each floor between the beam joints by supporting them on the column-building formwork, as well as the ends and the beam-joining hardware and the The pillar construction form and the plurality of final fastening bolts and temporary fastening bolts are respectively joined together, and then concrete is poured into the pillar construction form over a plurality of floors, After Nkurito is cured, characterized by dismantling the pillar construction for formwork remove the temporary tightening bolt.

[0006]

1 to 5 show an example of a structure under construction. In the drawings, reference numeral 1a denotes a main reinforcing bar arranged in the concrete of a reinforced concrete column 1 (hereinafter referred to as "column 1").
1b is a hoop reinforcing bar wound around the main bar 1a in the concrete of the column 1 and 2 is a main bar 1a at the beam joint of each floor of the column 1.
The beam joint is temporarily fixed horizontally by a fixing nut (see FIG. 3) screwed to the binding wire or the main bar 1a, and buried in the concrete of the pillar 1 and fixed integrally with the completion of the construction of the pillar 1. It is hardware.

Reference numeral 3 denotes a main reinforcement for constructing the pillar 1.
Pillar construction formwork that can be assembled into a rectangular cross-section by connecting a plurality of steel formwork (metal form) 3a around 1a and hoop bar 1b with a plurality of temporary fastening bolts 4a or clips (not shown) , 6 are bridged over the beam joints on each floor of the column 1 and are joined to the column 1 by joining the ends of the upper and lower flanges 6a to the bracket 2a of the beam joining hardware 2 with a plurality of final tightening bolts 4b. Steel beams on each floor, 7 is a formwork 3 for pillar construction
An opening 8 is formed at the beam joint of each floor to project the upper and lower brackets 2a of the beam joint hardware 2 horizontally, 8 is attached to the end of the steel beam 6 by welding to the upper and lower flanges 6a, 6a,
An end plate that closes the opening 7 and increases the rigidity of the end of the steel beam 6 at the same time as the end plate 9. A floor construction formwork 9 is laid on the steel beam 6 of each floor and is a deck plate that becomes a part of the floor slab of each floor. , 10a are cast into the formwork 3 for pillar construction,
Concrete that forms the pillar 1 with the main reinforcement 1a and the hoop reinforcement 1b, and the reference numeral 10b is cast on the floor-building formwork 9,
This is concrete that forms a floor slab integrated with the floor construction formwork 9.

In such a configuration, a construction method of a structure according to the present invention will be described step by step.

First, the main muscle 1a of the column 1 and the hoop muscle
1b is assembled into a rectangular shape over a plurality of floors, and the beam joint hardware 2 is attached to the beam joint of each floor (see FIG. 1). The beam joint hardware 2 is connected to the main bar 1a by a binding wire or a fixing nut (see FIG. 3).
Temporarily fix horizontally.

In this case, the level of the beam joint 2 can be freely adjusted according to the height or the beam of the steel beam 6 by fixing the beam joint 2 to the main bar 1a with a fixing nut.

Next, a column-building formwork 3 is assembled around the main bar 1a and the hoop bar 1b into a rectangular cross section over a plurality of floors. The pillar-building formwork 3 is assembled while connecting a plurality of steel formworks 3a so as to be self-supporting with temporary fastening bolts 4a or clips (see FIG. 4). In this case, beams on each floor of the pillar-building formwork 3 An opening 7 is provided at the joint, and the brackets 2a of the beam joining hardware 2 are projected horizontally from the opening 7 (see FIG. 3).

In addition, a spacer 11 is interposed between the butting portions of the adjacent steel molds 3a (see FIG. 5), so that when the pillar-forming mold 3 is released from the mold, the steel molds 3a are joined together. By preventing the adhesion, the steel mold 3a can be smoothly removed.

Next, the steel beam 6 of each floor is bridged between the beam joints of each floor of the column-building formwork 3, and both ends of the bracket 2 of the upper and lower beam joint hardware 2 protruding through the opening 7.
Insert between a and 2a respectively.

The upper and lower flanges of the steel beam 6 on each floor
6a and the bracket 2a of the beam joining hardware 2 are integrally joined by a plurality of final tightening bolts 4b.
The upper and lower flanges 6a, the bracket 2a of the beam joining hardware 2 and the steel formwork 3a are integrally connected by a temporary tightening bolt 4a (see FIG. 3).

The temporary tightening bolt 4a is removed when the mold is removed, and the final tightening bolt 4b is retightened. Also, an end plate 8 is provided between the upper and lower flanges 6a at the end of the steel beam 6 on each floor.
Is attached in advance.

In this manner, the main bar 1a of the column 1 and the hoop bar
1b, assemble the column-building formwork 3 and the steel beam 6 over the second or third floor. Further, floor formwork 9 is laid on the steel beam 6 on each floor, and is fixed to the steel beam 6 by welding or the like.

Next, concrete 10a is poured into the column forming form 3 and concrete 10b is put on the floor form 9, and is sufficiently cured. Then, when the concrete 10a exhibits sufficient strength, the formwork 3 for pillar construction is released. Hereinafter, in the same manner, construction is performed in the direction of the second floor or the third floor, and the entire floor of the building is constructed.

Although the floor form 9 is left as it is as a part of the floor slab, the steel form 3a of the column-building form 3 is removed and used repeatedly.

[0019]

The construction method for a structure according to the present invention has the above-described configuration, and thus has the following effects.

Since the formwork for column construction is assembled from a plurality of steel formwork, the end of the steel beam can be directly placed on the formwork for column construction and supported. For this reason, immediately after assembling the column-building formwork, the steel beam is supported at both ends by the column-formation formwork and bridged between the beam joints, and the floor formwork is installed on the steel beam. , Then you can continue working.

In addition, the main reinforcement of the pillar, the hoop reinforcement, and the formwork for pillar construction are assembled by a plurality of floors, the beam is bridged by a plurality of floors, and concrete is cast on the pillar construction form by a plurality of floors, and a plurality of floors are constructed. The construction allows the framing work to be performed very efficiently, and the construction period can be significantly reduced.

Further, the beam connecting hardware is attached to the main reinforcement of the column by a fixing nut, and the end of the steel beam and the beam connecting hardware, and the end of the steel beam and the column forming form are each provided with a plurality of final fastening bolts. And temporary fastening bolts, it is easy to join the members together, and the skeleton is extremely self-sustaining, so the skeleton construction can be performed very efficiently in a cycle similar to the steel frame construction method, By fixing the beam connecting hardware to the main reinforcing bar of the column with a fixing nut, the level of the beam connecting hardware can be freely adjusted according to the height and beam formation of the steel beam.

By separately casting the concrete of the pillar and the concrete of the floor, economical construction can be achieved by casting high-strength concrete only on the pillar.

[Brief description of the drawings]

FIG. 1 is a partial longitudinal sectional view of a structure under construction.

FIG. 2 is a partial longitudinal sectional view of a structure under construction.

FIG. 3 is an enlarged vertical sectional view of a column / beam joint.

FIG. 4 is an enlarged vertical sectional view of a column / beam joint.

FIG. 5 is a longitudinal sectional view of a connecting portion of the steel formwork.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... pillar (reinforced concrete column), 1a ... main reinforcement, 1b ... hoop reinforcement, 2 ... beam joint metal, 3 ... pillar construction formwork, 3a ... steel formwork (metal form), 4a ... temporary fastening bolt, 4b ... Final tightening bolt, 6: steel beam, 6a: upper and lower flange, 7: opening,
8: End plate, 9: Floor form, 10a, 10b: Concrete, 11: Spacer.

Claims (1)

(57) [Claims] In a method of constructing a structure in which a column and a beam are made of reinforced concrete and a steel beam, respectively, a main reinforcement and a hoop reinforcement of the column are assembled on a plurality of floors, and an end of the steel beam is connected to a beam joint of each floor of the main reinforcement. The beam joining hardware for joining the parts is attached to the main reinforcement with fixing nuts, respectively.Next, a column construction formwork composed of a plurality of steel formwork around the main reinforcement and the hoop reinforcement is assembled over a plurality of floors. A steel beam of each floor is supported by the pillar construction form between the beam joints, and each bridge is bridged, and both ends thereof, the beam joint hardware and the column construction form are respectively tightened with a plurality of final tightening bolts. Joined with temporary fastening bolts, then cast concrete over the plurality of floors in the pillar construction formwork, and after the concrete has hardened, remove the temporary fastening bolts. And dismantling the formwork for constructing a pillar.