JPH108725A - Constructing method for building frame - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the number of joints, to save the labor of operation and to shorten the term of works by a method wherein a through-steel-framed beam corresponding to a plurality of spans is fixed onto reinforcement columns disposed in upright at regular intervals by welding, etc., column forms are installed and concrete is placed. SOLUTION: In the constructing method of a building frame, in which a column has cast-in-place reinforced concrete construction and a beam has a steel-framed structure, the through-steel-framed beam 1 is fixed onto built-up reinforcement columns 2 disposed in upright at regular intervals, and the beam corresponding to a plurality of spans is formed integrally. The method can also be applied to a steel-framed concrete column and a single-span steel-framed beam. Forms are built around the built-up reinforcement columns 2, concrete is placed, and the columns and the through-steel-framed beam 1 are unified. The steel-framed beam 1 is extended gradually crosswise and in the upper direction by the method, thus building the building frame. The duty cycle of a crane, etc., is reduced, the number of the Joints of the beam is decreased, and the labor of works is saved and the term of works is shortened. Accordingly, construction cost can-be curtailed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a column or the like for a building or the like having a column made of cast-in-place reinforced concrete (hereinafter abbreviated as RC structure) and a beam made of a steel frame (hereinafter abbreviated as S structure). The present invention relates to a method for constructing a beam structure.

[0002]

2. Description of the Related Art Conventionally, as a method of constructing a skeleton as described above, Japanese Unexamined Patent Publication No. 3-137330 discloses a precast concrete (hereinafter, referred to as PC) in which a beam support is buried and integrally provided in a beam connection portion. A method of erecting a column and joining a steel frame beam between beam supports of the PC column is disclosed.

[0003] Japanese Patent Publication No. 4-71616 discloses a vertically assembled steel bar having an independent beam end steel frame attached to an assembled steel column, and joining the steel beam between the beam end steel frames. And a method of assembling a mold of a wall or a wall, laying a deck plate on a beam, and placing concrete such as columns, slabs, and walls. Japanese Patent Publication No. 4-1171 / 1992 discloses a method in which a steel bar for a column assembled to a length of a plurality of floors and a beam end steel frame (a beam connection structure) for a plurality of floors is attached, and the beam is built. There is disclosed a method of joining steel beams between end steel frames, assembling a column formwork, and pouring concrete for columns.

Japanese Patent Publication No. 4-47110 discloses a method of assembling a reinforcing steel cage for a column to which two beams are assembled and to which a beam fitting is attached, and joining a steel beam between the beam ends. Then, assemble the column formwork for one layer around the outer periphery of the reinforcing rod cage, cast concrete for the pillar, lay a PC board on the steel beam, cast concrete for the slab, and especially for the adjacent pillar. A method is disclosed in which the joint position of the reinforcing bar is shifted by one layer.

[0005]

In the conventional construction method described above, the lifting work must be carried out by using a heavy machine for the method of building the reinforcing rod cage and the steel beam separately. However, there is a problem that it takes a lot of labor and time. Further, since the column formwork is built after the reinforcing rod cage is built, there is a problem that much labor and time are required.

Accordingly, the main objects of the present invention are to save labor and shorten the construction period of the erecting work, to reduce the number of joints and to reduce the processing cost, and to reduce the need for splice plates and high-strength bolts. An object of the present invention is to provide a method of constructing a skeleton, which is improved so that the number of materials can be reduced by reducing the number.

[0007]

Means for Solving the Problems As means for solving the above-mentioned problems, the invention described in claim 1 is a method for constructing a skeleton in which a column is an in-place RC structure and a beam is an S structure. Attach the reinforcing steel columns in advance at the column positions of the through steel beams for spans or multiple spans, and build the through steel beams and assembled reinforced column modules, and then build the column formwork and concrete of the columns. And a step of casting.

According to a second aspect of the present invention, there is provided a method of constructing a skeleton having an RC structure in which a column is cast in place and a beam having an S structure, a temporary provision is made in advance at a column position of a through steel beam for one span or a plurality of spans. Mounting the assembled reinforced pillars assembled with the steel columns of the above, and performing the method of building the through-beam beams and the assembled reinforced pillar modules, then erection of the column formwork, and placing concrete of the columns. It is characterized by.

[0009] The assembled reinforced pillar according to claim 1,
And the assembled reinforcing steel pillars assembled with the temporary steel pillars according to claim 2 are pre-assembled with column forms on the respective outer peripheries,
It is also characterized in that the through steel beam, the assembled reinforced column and the column form module are erected, and then the concrete of the column is poured.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION The skeleton building method of the present invention is suitably carried out for building a skeleton such as a building in which pillars are cast in place and RC beams are used and beams are S structures. The present invention is roughly divided into three embodiments. In the first embodiment, as described in claim 1, an assembling reinforced pillar is previously attached to a column position of a through steel beam for one span or a plurality of spans, and a method of building the through steel beam and the assembled reinforced pillar module is described. This is a construction method in which a column formwork and, if necessary, a slab formwork and a wall formwork are erected, and the concrete of the columns, slabs and walls is cast. In short, the feature is that the steel beams and the assembled reinforced columns for a plurality of spans are united and simultaneously built.

According to the second embodiment, as in the second aspect, an assembled reinforced pillar to which a temporary steel pillar is assembled is attached in advance to the pillar position of the through steel beam for one span or a plurality of spans. This is a construction method in which a through steel beam and an assembled reinforced column module are built, and then a column formwork and, if necessary, a slab formwork and a wall formwork are built, and the columns, slabs, and wall concrete are cast. In short, by temporarily supporting the steel beams with the temporary steel columns at the time of building, the laborious and time-consuming joining process of the column main bars can be postponed, so that the labor of the building work can be saved.

According to a third embodiment of the present invention, as shown in claim 3, the assembled reinforcing steel pillar in the first embodiment and the assembled steel reinforcing pillar in which the temporary steel pillar in the second embodiment are assembled are respectively separated. In this method, a column formwork is previously assembled on each of the outer circumferences, the above-described through steel beam, the assembled reinforced columns and the column formwork module are built, and then concrete of the column is poured. According to the third embodiment, the work of setting up the column formwork can be performed in advance at the factory or the site of the site before the lifting work, so that the labor and the time can be reduced.

Hereinafter, the construction method of each embodiment will be described individually. FIGS. 1 and 2 show the construction concept of the construction method according to claim 1 in terms of work progress from left to right. Through steel beam with pre-assembled reinforced columns 2 pre-assembled at the column position of through steel beam 1 for 2 spans (or multiple spans of 2 or more are also possible)
The assembling of the reinforced pillar module is performed by using the heavy equipment 7, thereby saving labor of the assembling work and shortening the construction period. In addition, since the number of joints of the beam is reduced by half by using the through steel beam 1 for two spans, the cost of joint processing of the steel beam is reduced, and the number of splice plates and high tension bolts used is reduced. Material costs can be reduced. After the module is built, the column formwork 3 and, if necessary, the slab formwork and the wall formwork are built in, and the columns, slabs, and concrete of the walls are cast. In addition, illustration of the slab formwork and the wall formwork was omitted. Usually, a method in which a deck plate or a PC board is laid on a steel beam is suitably used as the slab formwork. Reference numeral 4 in FIG. 1 indicates a hanging wire of the crane, and 8 indicates a completed RC column.

The upper and lower column main reinforcing bars are joined to each other when the assembled reinforcing column 2 is built. Therefore, as shown in FIG.
The circular column main reinforcing bar fixing plate 10 is fixed to the upper and lower flanges at the column position of the through steel beam 1 by welding or bolting. A plurality of nuts 11 are fixed to the outer periphery of the main column fixing plate 10 by welding. On the other hand, as the column main bar, a screw bar 2a having an outer diameter of about 32 mm and a length of one layer is mainly used, and this is screwed to the nut 11 to be threaded and assembled to the steel beam 1 to assemble the steel bar 2. Is assembled. By the sum of the plurality of screw reinforcing bars 2a, the self-supporting of the assembled reinforcing steel column 2 and the supporting force of the through steel beam 1 can be obtained. In addition, in order to secure the amount of reinforcing bars required for the RC column, a plurality of ordinary reinforcing bars 2b having an outer diameter of about 25 mm are also used as column main bars. Each column main reinforcing bar 2a, 2b is raised about 1 m upward from the upper nut 11 on the assumption that the column main reinforcing bars 2a, 2b are joined to the upper assembled steel reinforcing column. The upper and lower column main bars are joined by using a sleeve joint or other mechanical joints. A hoop 2c is naturally attached to the assembled reinforced pillar 2. In addition, through steel beam 1
In order to join the girder material in the girder direction,
2 are provided. Reference numeral 13 in FIG. 3 denotes an end plate attached to the end steel frame 12 as a part of a column formwork.

The through steel beam / assembled reinforced column module constructed as described above is erected every other span as shown in FIG. 1 and a steel frame of one span length is placed in the space for the one span. The beams 1 'are sequentially joined using a heavy machine 7'. For this reason, both ends of the through steel beam 1 are subjected to joint processing similar to that of a normal steel beam. FIG. 2 also shows that the beam 5 is joined in the direction of beaming before the beam 6 is attached.

FIGS. 4A to 4E show the construction sequence from the stage of assembling the through steel beam / assembly reinforced column module in more detail than FIG. FIG. 4A shows a procedure for transporting the through-steel beam 1 for two spans (and the steel beam 1 ′ for one span) manufactured at the factory to the site by the truck 14. FIG. 4B shows the supporting beam 1 at the site site.
5 shows how to horizontally support and assemble the assembled steel column 2. However, the assembled reinforced columns 2 can be previously assembled to the steel beams 1 at a factory. FIG. 4C shows a state where the upper and lower column main reinforcements are suspended by a heavy machine as a part of the work of building a completed through-beam beam / assembly reinforced pillar column module. FIG. 4D shows the through steel beams 1, 1, which are constructed with an interval of one span, supported by the assembled reinforced columns 2 and a plurality of support wires 16, and the left and right through steel beams 1, 1.
1 shows the procedure of suspending and connecting a 1-span steel beam 1 ′ between spaces 1. FIG. 4E shows the RC columns 8 and slabs 9 in which the column formwork 3 and the like have been erected, concrete has been cast, and after curing, a part of the column formwork has been dismantled.

Next, FIG. 5 shows the construction concept of the construction method according to claim 2 with the contents corresponding to FIG. The present embodiment is characterized in that the assembled reinforced pillar 2 to which the temporary steel pillar 17 is assembled is attached to the column position of the through steel beam 1 in advance, and the through steel beam / assembly reinforced pillar module is built. is there. FIG. 6 shows the details of the joint structure of the assembled reinforced pillar 2 including the temporary steel pillar 17. FIG. 6 is based on the structure of the assembled reinforced column 2 of FIG. The length of the H-shaped steel employed for the temporary steel column 17 is set to a length obtained by subtracting about 1 m from one layer, and the top end is fixed to the lower surface of the lower flange of the steel beam 1 by welding or the like. Also shown is a configuration in which a temporary steel column 17 'having a height of about 1 m is fixedly attached and integrally assembled for a joint.

Accordingly, the work of installing the steel beam / assembled reinforced column module is performed by the temporary steel columns 1 of the assembled reinforced columns 2.
The lower end of 7 is placed on a temporary steel column 17 'rising from the lower steel beam, and temporarily fixed by bolting or other means to support the upper steel beam 1. Thereafter, the joining of the main reinforcements 2a and 2b can be surely advanced one by one, so that the diversion and operation rate of the heavy equipment 7 can be increased, a work margin can be obtained, and safety can be enhanced.

The significance of the temporary steel columns 17 and 17 ′ is that the RC columns 8 are not considered as elements in the structural strength (not included in the calculation), and only vertical loads (only axial forces) during construction. ) To make it a burdensome factor. Next, FIG.
Fig. 1 shows the construction concept of the construction method described in claim 3;
The content is shown corresponding to FIG. In the case of this embodiment,
Regardless of whether or not the assembled reinforced pillar 2 attached to the through steel beam 1 includes the temporary steel pillars 17 and 17 ′ according to claim 2, a pillar is previously provided on the outer periphery of the assembled reinforced pillar 2. The method is characterized by assembling the formwork 3 and working together to build the through-beams, assembled reinforced columns and column formwork modules. Therefore, the formworker can carry out the erection work together with the reinforced work, and can solve the problem that the laying work is started after the work of erection of the steel beam / assembly reinforced pillar is completed. Therefore, the work process and labor management can be equalized, and work at high places can be eliminated. However, a column formwork will be retrofitted at the joint of the column main reinforcement.

FIG. 8 shows a construction order corresponding to FIGS. 4A to 4C. As shown in FIG. 8A, the steel beam 1 transported to the site by the truck 14 is horizontally supported by the support base 15 at the site as shown in FIG. Then, the pillar formwork 3 is erected for each pillar that has been assembled. Thereafter, as shown in FIG. 8C, the building work is performed as a through steel beam / assembly reinforced pillar / column formwork module. However, the rebar columns 2 can be attached at the factory and only the column form 3 can be built at the site.

Finally, FIG. 9 shows an embodiment in which the building is carried out with a module for one span. Except that the length of the steel beam 1 is equivalent to one span, the contents are technically common to the above inventions. In addition, the length of the assembled reinforcing steel column 2 is formed to be the same as the length of the assembled reinforcing steel column 2 in accordance with the width of the truck bed on the premise that the assembled reinforcing steel column 2 is attached to the steel beam 1 at the factory and transported by truck. This is shown.

[0022]

[Effects of the present invention] According to the method for constructing a skeleton of the present invention, it is possible to save labor and shorten the construction period of column and beam work, and to process steel beams by the reduced number of beam joints. It is also possible to reduce costs and material costs due to a decrease in the number of splice plates, high tension bolts and the like used.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram of construction according to the first aspect of the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a detailed view of the installation of the assembled reinforcing rod.

4A to 4E are process explanatory diagrams of a construction order.

FIG. 5 is a conceptual diagram of construction according to the second aspect of the present invention.

FIG. 6 is a detailed view of the attachment of the temporary steel columns and the assembled steel columns.

FIG. 7 is a conceptual view of construction according to the third aspect of the present invention.

FIGS. 8A to 8C are process explanatory diagrams of a construction order.

FIG. 9 is a conceptual diagram of a one-span type construction.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Through steel beam 2 Assembled reinforced pillar 3 Column formwork 17 Temporary steel column 17 'Temporary steel column

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Hisashi Matsuoka 8-21-1, Ginza, Chuo-ku, Tokyo Inside Takenaka Corporation Tokyo Main Store

Claims (3)

[Claims] 1. A method for constructing a skeleton having a cast-in-place reinforced concrete column and a steel frame-structured beam, comprising: assembling reinforced columns in advance at one or more spans of through-beam beams; A method of constructing a skeleton, comprising the steps of: building a beam and an assembled reinforced column module, then erection of a column formwork, and placing concrete of the column. 2. A method of constructing a skeleton in which a column is a cast-in-place reinforced concrete structure and a beam is a steel frame structure, wherein a temporary steel column is assembled in advance at a column position of a through steel beam for one span or a plurality of spans. A method for constructing a skeleton, comprising the steps of mounting, and the step of building the through-beam and the assembled reinforced column module, and then erection of the column formwork and casting of concrete for the column. 3. The assembled steel column as set forth in claim 1 and the assembled steel column into which the temporary steel column as set forth in claim 2 are assembled, and a column form is previously assembled on the outer periphery of each of the assembled steel columns, and A method for constructing a skeleton, comprising: constructing a beam, an assembled reinforced column and a column form module, and then pouring concrete for the column.