JP2009097247A - Column steel frame erection method, steel frame reinforcement unit for column, and steel framed reinforced concrete column - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a column steel frame erection method for achieving shortening of construction period. <P>SOLUTION: A column cage 3 is assembled in an assembly yard 1, and the column cage 3 is moved from the assembly yard 1 to a unit-making yard 10. The column cage is erected within a space 12 of a rectangular shape in plan view of a scaffolding 11 installed in the unit-making yard 10. A column steel frame 20 is inserted into the column cage 3 with keeping the above state, and the column cage 3 and the column steel frame 20 are connected with a connection means 25 to form a column unit 21 within the space 12 of the scaffolding 11. The column unit 21 is erected in a construction yard 40. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  TECHNICAL FIELD The present invention relates to a method for building a column steel frame, a column steel rebar unit, and a steel reinforced concrete column. .

  Conventionally, in a steel frame construction of a steel reinforced concrete structure (SRC structure), as an example of a method of building a column steel frame in a building yard, a column steel frame carried by a truck or the like from the outside is temporarily stored in the stock yard. The column steel frame is lifted from the stock yard by a lifting equipment (for example, a crane), moved to the building yard, and built at a predetermined position in the building yard. A method is known in which various types of reinforcing bars such as reinforcing bars are arranged to assemble column reinforcing bar rods and to integrate column reinforcing rod rods and column steel frames (for example, see Patent Document 1).

As another example, a column steel frame is lifted from a stock yard by a lifting equipment (for example, a crane), moved to a ground yard, set sideways on a ground yard frame, and a column steel frame on the ground yard. Assemble the various types of reinforcing bars such as main bars and straps around the frame to assemble the column reinforcement bar, and then connect the column steel frame and column reinforcement bar together to form the column unit. There is known a method of lifting by a lifting equipment, moving it from a mount to a building yard, and building it in the building yard.
JP-A-6-73783

  By the way, in the former method of building the column steel frame as described above, after building the column steel frame in the building yard, various reinforcing bars such as main bars and strip bars are placed around the column steel frame. Since it is necessary to arrange the column reinforcement rods by arranging the bars, it takes time and labor for the steel frame construction of the frame, and the overall construction period becomes long.

  Also, in the latter method, a column unit is formed by assembling column reinforcement bars around the column steel frame in the ground yard to form a column unit in which both are integrated, and this column unit is moved from the ground yard to the building yard. Therefore, the time and labor required for the steel frame construction of the frame can be reduced compared to the former.

  However, when performing the reinforcement work of various reinforcing bars such as main bars and straps on the column steel frame set on the gantry, this mobile temporary scaffolding is used using a mobile temporary scaffolding composed of stepladders and scaffolding plates. Assemble the rebars around the column steel by tying the various types of rebar such as main and band bars together with binding lines etc. As a result, it takes time and labor to assemble the column reinforcement rods.

  Also, "Work to move the column steel frame from the stock yard to the frame" and set it up. → "Assemble the column steel frame on the frame by assembling the column frame and assemble the column frame and column beam. “Work to form an integrated pillar unit” → “Work to move the pillar unit from the gantry to the building yard and build it” is a series of work. By repeating this series of work, multiple pillars are built in the building yard. Since the unit is built, it takes time and effort to construct the steel frame, and the construction period as a whole becomes longer.

  Furthermore, in addition to the building yard, a stock yard where stocked column steel frames are stocked and a ground yard that forms a column unit are required, so applicable skeleton construction can secure these yards. It ’s limited to things.

  The present invention has been made in view of the conventional problems as described above, and it is possible to greatly shorten the construction period and to expand the applicable range, and to build a column steel frame and a column steel frame An object is to provide a reinforcing bar unit and a steel reinforced concrete column.

In order to solve the above problems, the present invention employs the following means.
That is, in the invention according to claim 1, a column steel frame is formed by inserting a column steel frame inside a pre-assembled column rebar rod to integrate the column rebar rod and the column steel frame. It is built in the side yard.

  According to the method of building a column steel frame according to the present invention, a column steel frame is inserted into a pre-assembled column rebar rod and the column rebar rod and the column steel frame are integrated to form a column unit. By building it in the yard, the pillar part of the frame can be built. This eliminates the need for assembling the reinforcing bar rods by arranging the main bars, strips, and the like around the column steel frames in the building yard, thereby reducing the time and labor required for the steel frame construction of the frame.

  The invention according to claim 2 is the construction method of the pillar steel frame according to claim 1, wherein the pillar reinforcing bar is assembled in the ground yard, and is moved from the ground yard to the united yard. In this state, the column steel frame is inserted inside the column rebar rod and the column rebar rod and the column steel frame are coupled by a coupling means. Thus, the pillar unit is formed in the space of the scaffold.

  According to the method of building the column steel frame according to the present invention, the column reinforcement bar assembled in the ground yard is moved to stand in the space of the united yard scaffolding, and in this state, the column steel frame is placed inside the column reinforcement frame. The column unit can be formed by inserting and integrating the column reinforcement bar and the column steel frame by the connecting means. This eliminates the need for assembling the reinforcing bar rods by arranging the main bars, strips, and the like around the column steel frames in the building yard, thereby reducing the time and labor required for the steel frame construction of the frame.

  The invention according to claim 3 is the construction method of the column steel frame according to claim 1 or 2, wherein the connection means is attached to the column steel frame side, and a first connection plate attached to the column steel bar side. A second connection plate, a third connection plate spanned between the first connection plate and the second connection plate, the first connection plate, the second connection plate, and the third connection plate. And a screw fastening body connected together.

  According to the construction method of the column steel frame according to the present invention, the third connection plate is bridged between the first connection plate on the column reinforcing bar side and the second connection plate on the column steel frame side, and the first connection plate and the second connection plate are connected. By connecting the plate and the third connecting plate integrally with the screw fastening body, the column reinforcing bar rod and the column steel frame are integrally connected to form a column unit in which the column reinforcing bar rod and the column steel frame are integrated.

  The invention according to claim 4 is the method of building the pillar steel frame according to claim 2 or 3, wherein the pillar unit is formed around the pillar unit when the pillar unit is formed in the scaffold space of the unitized yard. A steel construction method scaffold is attached so as to surround the column unit, and a ladder is attached to the steel construction method scaffold in a suspended state.

  According to the method for building a column steel frame according to the present invention, it is not necessary to attach a steel frame building scaffold or ladder to the column unit after the column unit is built in the building yard.

  The invention according to claim 5 is a column steel rebar unit used for a steel reinforced concrete column, wherein a column steel frame is inserted inside a pre-assembled column rebar rod, and in this state the column rebar rod and the column steel frame And are integrated.

  The invention according to claim 6 is a steel reinforced concrete column comprising a column unit in which a column steel frame is inserted inside a pre-assembled column reinforcement rod and the column reinforcement rod and the column steel frame are integrated. It is characterized by being.

As described above, according to the present invention, a column steel frame is inserted into a pre-assembled column rebar rod, the column rebar rod and the column steel frame are integrated to form a column unit, and this column unit is built. By building in the side yard, the pillar part of the frame can be built.
Therefore, it is not necessary to assemble main bar or band bars around the pillar steel frame in the building yard, so the time and labor required for the steel frame construction of the frame can be reduced, and the construction period can be reduced. It can be shortened.

Moreover, since the column unit which integrated the column reinforcement bar and the column steel frame can be formed in the space of the scaffold of the unitized yard, the column unit can be efficiently formed and built in the building yard.
Therefore, the time and labor required for the steel frame construction of the frame can be reduced, and the construction period can also be shortened.

  Further, the work of forming the column unit is performed by bridging the third connection plate between the first connection plate on the column reinforcing bar side and the second connection plate on the column steel frame side, and the first connection plate and the second connection plate, Since it is only necessary to integrally connect the third connecting plate with the screw fastening body, the time and labor required for forming the column unit can be reduced, and the construction period can also be shortened.

  Furthermore, since it is not necessary to attach a steel frame construction scaffold or ladder to the pillar unit after the pillar unit has been built in the construction yard, this can also reduce the time and labor required for the steel construction. Can be shortened.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 3 show an embodiment of a method for building a steel frame according to the present invention. FIG. 1 is an explanatory diagram showing work steps in a ground yard, a unitized yard, and a building yard. 2 is a partially enlarged plan view of FIG. 1, and FIG. 3 is a partially enlarged front view of FIG.

  That is, the method of building the column steel frame of the present embodiment is effective for the steel frame construction of a steel reinforced concrete structure (SRC structure), and includes a column reinforcing bar assembly process, a column unit forming process, and a column unit building. Process. Hereinafter, each step will be described in detail.

(1) Column reinforcement bar assembly process The column reinforcement column assembly process is a process performed in the ground yard 1 close to the building yard 40 as shown on the left side of FIG. Reinforcing bars such as the main bars 4 and the band bars 5 are arranged on the gantry 2, and these reinforcing bars are connected to each other by a binding wire or the like, thereby assembling the prism-shaped column reinforcement bar 3 on the gantry 2 sideways.

  In this case, screw reinforcing bars are used for at least some of the main reinforcing bars 4 constituting the column reinforcing bar rod 3 (for example, two main reinforcing bars 4 arranged on two opposing surfaces). By using the main reinforcing bar 4, the first connecting plate 26 of the connecting means 25 described later and the main reinforcing bar nut 34 of the screw fastening body 30 can be attached to the upper end portion of the column reinforcing bar 3.

The assembly work of the above-mentioned column reinforcing bar 3 is performed by installing one or a plurality of mounts 2 in the ground yard 1. When using a plurality of mounts 2, the assembly work of the plurality of column reinforcement bars 3 can be performed in parallel, so that the plurality of column reinforcement bars 3 necessary for the steel frame construction of the frame can be efficiently assembled. it can.
In the above-described column reinforcing bar assembly process, a first connecting plate 26 of the connecting means 25 described later may be attached to the upper end portion of the column reinforcing bar 3.

(2) Column unit forming process The column unit forming process is a process performed in the unitized yard 10 close to the ground yard 1 as shown in the center of FIG. The rebar bar 3 and the column steel frame 20 carried into the unitized yard 10 from the outside by a truck or the like are integrally connected by the connecting means 25 to form a column unit 21 in which the column bar bar 3 and the column steel frame 20 are integrated. In this case, since the column steel frame 20 can be directly carried into the unitized yard 10 from a truck or the like, it is not necessary to provide a stock yard for stocking the column steel frames 20 in advance.

  As shown in FIGS. 2 and 3, the connecting means 25 includes a first connecting plate 26 attached to the column reinforcing bar 3 and a screw fastening body 30 (main bar nut 34 for attaching the first connecting plate 26 to the column reinforcing bar 3. ), A second connection plate 27 attached to a part of the column steel frame 20 corresponding to the first connection plate 26, and a third connection plate 28 spanned between the first connection plate 26 and the second connection plate 27. The screw connection body 30 (bolt, washer, and nut 3) that integrally connects the first connection plate 26, the second connection plate 27, and the third connection plate 28 together.

  In the pillar unit formation step, first, the scaffold 11 is assembled and installed in the united yard 10 in a lattice shape in plan view, for example, and a plurality of rectangular spaces 12 in plan view surrounded by the scaffold 11 are formed in the united yard 10. The column reinforcement bar 3 formed and assembled on the gantry 2 of the ground yard 1 is moved into each space 12 of the scaffold 11 by lifting equipment (for example, a crane), and this column reinforcement bar 3 is moved into each space 12. Stand vertically.

  In this case, the support member 13 is fixed to the bottom of each space 12 in advance, and the lower ends of the main bars 4 of the column reinforcing bar 3 are inserted into the support 14 of the support member 13, thereby The column reinforcement bar 3 is erected in a stable state in the vertical direction at a predetermined position. The support member 13 includes a substrate and a plurality of cylindrical support portions 14 erected on the upper portion of the substrate. By inserting the lower end portions of the main bars 4 into the support portions 14, the column reinforcing bar 3 is vertically It can be supported stably in the direction.

  Next, while attaching the 1st connection plate 26 of the connection means 25 to two places of two surfaces which the upper end part of the column reinforcement bar 3 standingly arranged in each space 12 using the main reinforcement 4 which consists of a screw reinforcement. The steel building construction scaffold 35 is attached so as to surround the upper end of the column reinforcing bar 3, and an aluminum ladder (not shown) is attached to the steel construction work scaffold 35. .

  As shown in FIGS. 2 and 3, the first connecting plate 26 is a band-shaped member formed of flat steel, equilateral angle steel, or the like, and has two main reinforcement insertion holes 26a provided at both ends in the longitudinal direction. By inserting the main reinforcement 4 composed of the threaded reinforcing bar of the column reinforcing bar 3 into the main reinforcement insertion hole 26a and tightening the two main reinforcement nuts 34 of the screw fastening body 30 attached to the main reinforcement 4 in this state, It is attached to the upper end of the reinforcing bar 3. Screw insertion holes 26b for fixing one end of a third connection plate 28, which will be described later, are provided at two locations in the center of the first connection plate 26.

  Next, as shown in the center of FIG. 1, a column steel frame 20 made of a square steel pipe, H-shaped steel, or the like is inserted into the inside of the column reinforcing bar 3 erected in each space 12 by a lifting equipment. The second connection plate 27 attached in advance to the two opposing surfaces of the steel plate is made to correspond to the first connection plate 26 of the column reinforcing bar 3.

  As shown in FIGS. 2 and 3, the second connecting plate 27 has a flat plate shape made of flat steel or the like, and is attached to two opposing surfaces of the column steel frame 20 by welding in advance. . Screw insertion holes 27a for fixing the other end of a third connection plate 28, which will be described later, are provided at two locations in the center of the second connection plate 27.

  Next, the third connection plate 28 is bridged between the first connection plate 26 on the column reinforcing bar 3 side and the second connection plate 27 on the column steel frame 20 side. As shown in FIGS. 2 and 3, the third connection plate 28 has a flat plate shape made of flat steel or the like, and has two screw insertion holes 28 a at both ends.

  Then, the screw insertion hole 28a at one end of the third connection plate 28 and the screw insertion hole 26b of the first connection plate 26 are matched, and the screw insertion hole 28a at the other end of the third connection plate 28 and the first The second connection plate 27 is aligned with the screw insertion hole 27a, and the third connection plate 28 is positioned between the screw insertion hole 28a at one end and the screw insertion hole 26b of the first connection plate 26, and the third connection plate. The first connection plate is formed by inserting a screw fastening body 30 bolt between the screw insertion hole 28a at the other end of the screw 28 and the screw insertion hole 27a of the second connection plate 27 and tightening with a nut through a washer. 26 and the second connecting plate 27 are connected together via the third connecting plate 28.

In this way, by connecting the column reinforcing bar 3 and the column steel frame 20 integrally through the connecting means 25, the column unit 21 in which the column reinforcing bar 3 and the column steel frame 20 are integrated can be formed. .
In the present embodiment, two places between the column reinforcing bar 3 and the column steel frame 20 are connected by the connecting means 25, but if necessary, between the column reinforcing bar 3 and the column steel frame 20 One or three or more of these may be connected by the connecting means 25. Further, the connecting means 25 is not limited to the combination of the above configurations, and any connecting means 25 may be used as long as it can integrally connect the column reinforcing bar 3 and the column steel frame 20.

(3) Column unit building process The column unit building process is a process of building the column unit 21 formed in the unitized yard 10 at a predetermined position in the building yard 40 as shown on the right side of FIG. First, the column unit 21 formed in each space 12 of the scaffold 11 of the unitized yard 10 is lifted by a lifting equipment (for example, a crane), and as shown in FIG. Move to a predetermined position in the yard 40 and build at that position.

  In this case, as shown in FIGS. 2 and 3, since the two opposing surfaces of the column reinforcing bar 3 and the two opposing surfaces of the column steel frame 20 are integrally connected by the connecting means 25, Even if the column unit 21 is lifted by the lifting equipment and moved from the unitized yard 10 to the building yard 40, the column reinforcing bar 3 does not fall off from the periphery of the column steel frame 20, and the column reinforcing bar 3 And the pillar steel frame 20 can be built in a predetermined position in the building yard 40.

  Next, each main reinforcement 4 of the column reinforcement bar 3 of the column unit 21 built in the construction yard 40 and each main reinforcement 43 of the column base 42 built in advance on the base 41 of the construction yard 40, While joining integrally by welding, the lower end of the column steel frame 20 is integrally fixed on the base 41 with an anchor bolt (not shown) provided in advance on the base 41.

  Then, by repeatedly performing the above-described erection operation on the plurality of pillar units 21, the plurality of pillar units 21 are erected at predetermined positions on the base 41, and thereafter, as shown in FIG. As described above, the first-layer beam 50 is attached between the column steel frames 20 of the adjacent column units 21, and the deck plate 51 is installed above the first-layer beam 50.

  Next, as shown in FIG. 4 (c), the column reinforcement bar 3 assembled on the frame 2 of the ground yard 1 is lifted around the column steel frame 20 corresponding to the second layer of each column unit 21. It is lifted and attached by heavy equipment, and the column reinforcing bar 3 and the steel column 20 are integrally connected by the connecting means 25 described above.

  Then, as shown in FIG. 4 (d), a second layer beam 50 is attached between the column steel frames 20 of the adjacent column units 21, and a deck plate 51 is installed above the second layer beam 50. To do. Then, by repeatedly performing such work, as shown on the right side of FIG. 1, the steel frame construction of the multi-layered housing is completed.

  After completion of the steel frame construction of the frame, as shown in FIG. 4 (e), concrete 53 is placed on top of the deck plate 51 of each layer, and also shown in FIGS. 4 (f) and 4 (g). As shown in FIG. 4 (h), the frame of the steel reinforced concrete structure (SRC structure) is constructed by placing the formwork 52 around the pillar unit 21 of each layer and placing the concrete 53. Can do.

  In the method of building the column steel frame according to the present embodiment configured as described above, when performing the steel frame construction of the frame, the column reinforcement bar 3 is assembled side by side on the frame 2 of the ground yard 1, and this column Reinforcing bar 3 is moved vertically into each space 12 of scaffold 11 of unitized yard 10 from gantry 2 and vertically erected, and column steel frame 20 carried from the outside is inserted inside column reinforcing bar 3, The column reinforcing bar 3 and the column steel frame 20 are integrally connected by the connecting means 25 to form a column unit 21 in which the column reinforcing bar 3 and the column steel frame 20 are integrated. Since it was moved to the construction yard 40 and built at a predetermined position in the construction yard 40, the main reinforcement 4 and the strip 5 are arranged around the pillar steel frame 20 in the construction yard 40. The work of assembling the column reinforcement 3 is no longer necessary. It is possible to reduce the time and effort required for the steel frame construction of the body, it is possible to shorten the construction period.

  In addition, by installing a plurality of mounts 2 in the ground yard 1, a plurality of pillar rebar rods 3 can be assembled in parallel by a plurality of workers. It can be arranged in each space 12 of the scaffold 11 of the chemical yard 10.

  Furthermore, in the united yard 10, the connecting work between the column reinforcing bar 3 and the column steel frame 20 is performed by attaching the first connecting plate 26 to the column reinforcing bar 3 side and attaching the first connecting plate 26 and the column steel frame 20 side in advance. Since the third connection plate 28 may be bridged between the second connection plate 27 and the first connection plate 26 and the second connection plate 27 and the third connection plate 28 may be connected by the screw fastening body 30. And the connection operation | work of the column reinforcement bar 3 and the column steel frame 20 can be performed easily in a short time, and the column unit 21 can be formed efficiently.

  Further, the column rebar 3 is assembled on the frame 2 of the ground yard 1 and the column rebar 3 and the column steel frame 20 are integrally connected in each space 12 of the scaffold 11 of the unitized yard 10. It is not necessary to perform a series of operations for forming the column 21 and for building the column unit 21 from the unitized yard 10 into the erection yard 40, and each of the operations can be performed in parallel. It is possible to reduce the time and labor required for building in the building yard 40 and shorten the construction period.

  Further, after the pillar unit 21 is built in the building yard 40, it is not necessary to attach the scaffold 35 and the ladder 36 for building the steel frame to the pillar unit 21. Time and effort can be reduced.

  Further, it is not necessary to provide a space for stocking the column steel frames 20, and the building yard and the unitized yard are arranged within the working range of the lifting equipment for construction (for example, crane). Since all the work can be performed by the lifting equipment for one, the range of applicable frame construction can be expanded.

It is explanatory drawing which showed one Embodiment of the steel frame construction method by this invention, Comprising: It is explanatory drawing which shows the work process in a ground yard, a unitization yard, and a construction yard. It is an enlarged plan view of the connecting means of FIG. It is an enlarged front view of the connection means of FIG. It is explanatory drawing which showed the procedure of the pillar unit erection process.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Ground yard 2 Base 3 Column reinforcement 4 Main reinforcement 5 Band reinforcement 10 Unitization yard 11 Scaffold 12 Space 13 Support member 14 Support part 20 Column steel 21 Column unit 25 Connection means 26 1st connection plate 26a Main reinforcement insertion hole 26b Screw Insertion hole 27 Second connection plate 27a Screw insertion hole 28 Third connection plate 28a Screw insertion hole 30 Screw fastener 34 Main reinforcement nut 35 Scaffolding for steel frame construction work 40 Construction method yard 41 Base 42 Column base 43 Main reinforcement 50 Beam 51 Deck plate 52 Formwork 53 Concrete

Claims (6)

  A column steel unit is formed by inserting a column steel frame inside a pre-assembled column reinforcing bar to form the column unit in which the column reinforcing bar and the column steel frame are integrated, and the column unit is built in a building yard. How to build column steel.   The column reinforcing bar is assembled in the ground yard, moved from the ground yard to the united yard, and erected in a rectangular space in plan view of the scaffolding installed in the united yard. The column unit is formed in the space of the scaffold by inserting the column steel frame inside a reinforcing bar and connecting the column reinforcing bar and the column steel by a connecting means. How to build a steel pillar.   The connection means is bridged between the first connection plate attached to the pillar steel bar side, the second connection plate attached to the pillar steel frame side, and the first connection plate and the second connection plate. 3. The apparatus according to claim 1, further comprising: a third connection plate; and a screw fastening body that integrally connects the first connection plate, the second connection plate, and the third connection plate. How to build column steel.   When the pillar unit is formed in the space of the united yard scaffolding, a steel construction work scaffold is attached around the pillar unit so as to surround the pillar unit, and the steel construction work scaffold is attached to the scaffolding work scaffold. The method of building a pillar steel frame according to claim 2 or 3, wherein the ladder is attached in a suspended state. It is a steel rebar unit for columns used for steel reinforced concrete columns,
A column steel rebar unit in which a column steel frame is inserted inside a pre-assembled column rebar rod and the column rebar rod and the column steel frame are integrated in this state. Steel reinforced concrete columns,
A steel reinforced concrete column comprising a column unit in which a column steel frame is inserted inside a pre-assembled column reinforcing bar and the column reinforcing bar is integrated with the column steel frame.

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