JP2009013592A - Frame assembling method and frame of building - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a frame assembling method, reducing the term of work by adopting a vertically divided method even in the case of a building using columns of reinforced concrete construction. <P>SOLUTION: According to this frame assembling method, a frame of a building having the column of reinforced concrete construction and a beam of steel construction is assembled. In this frame assembling method, the frame includes a column unit 10 provided with a beam joint 14, and a beam member joined to the beam joint 14 of the column unit 10. The column unit 10 includes a temporary column 11, a column bar 12 supported on the temporary column 11, and a cylindrical sheath tube 13, which is provided on the temporary column 11, to which the beam joint 14 is joined, and through which the column bar 12 is passed. The frame of the building is divided into three work sections A, B, C in a plan view, the column unit 10 is field-preassembled in every work section, these column units 10 and beam members are lifted using a crawler crane to perform erection of framing up to the top floor, and such erection of framing is sequentially repeated by each adjacent work section to construct the frame. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a frame assembling method and a building frame. Specifically, the present invention relates to a frame assembling method for assembling a frame of a building having reinforced concrete columns and steel beams and a frame of the building.

2. Description of the Related Art Conventionally, a steel frame (S structure) or steel reinforced concrete (SRC structure) building frame is assembled by a construction escape method (also referred to as a folding wind method) (see Patent Document 1).
In the building escape method, the building frame is first divided into a plurality of work zones in plan view. For each work area, the steel columns and steel beams are lifted using a lifting machine, and the construction up to the top floor is performed.
This construction work is repeated while moving the lifting machine from the back side to the near side of the flow line of the lifting machine, thereby preventing the occurrence of a post-construction part for securing the flow line.

According to this built-in escape method, compared to the layered method that repeats the work of constructing the frame for each floor in buildings with two-dimensional spread, such as shopping centers, factories, warehouses, and offices in the middle and low rise, Shortening can be achieved.
JP 2001-311312 A

  However, in recent years, the material cost of steel frames has increased, and there is a demand for reducing the amount of steel frames and suppressing the increase in costs for steel structures and steel reinforced concrete buildings. Therefore, a composite structure in which the beam is a steel frame and the column is a reinforced concrete structure (RC structure) has been proposed.

  If the pillar is made of reinforced concrete, a curing period is required after placing the concrete of the pillar, and the frame cannot be completed to the top floor in a short period of time. Therefore, the built-up escape method cannot be adopted, and the post-construction part that becomes the flow line of the lifting machine is planned, and concrete is placed in order from the lower floor to the upper floor. As a result, until the construction related to the post-construction part is constructed, the equipment piping work and the finishing work cannot be started, and it becomes difficult to shorten the construction period.

  An object of the present invention is to provide a frame assembling method and a building frame that can shorten the construction period by adopting a built-in escape method even if the column is a reinforced concrete building.

  The frame assembling method according to claim 1 is a structure of a building (for example, a building 1 described later) having a reinforced concrete column (for example, column 2 described later) and a steel beam (for example, beam 4 described later). The frame is joined to a column unit (for example, a column unit 10 to be described later) provided with a beam joint (for example, a beam joint 14 to be described later) and a beam joint of the column unit. A beam member (e.g., a beam member 20 described later), and the column unit includes a steel column (e.g., a temporary column 11 described later) and a column reinforcement (e.g., supported by the steel column). And a cylindrical sheath tube (for example, a sheath tube 13 to be described later) provided on the steel column, to which the beam joint is joined and through which the column reinforcement is inserted. , Using a lifting machine (for example, a crawler crane 50 described later) Performs erection work top floor with Agekasane the column unit and the beam member and Chikumi, while sequentially repeated for each work area adjacent the erection work, characterized in that assembling the Frame.

According to the first aspect of the present invention, a steel column is prepared, and column bars are supported by the steel column. Furthermore, a cylindrical sheath tube is provided on the steel column, and a column bar is inserted into the sheath tube and a beam joint is joined to form a column unit. Then, the pillar unit and the beam member are erected by the erection method.
Therefore, even if the pillar is a reinforced concrete building, the construction escape method can be adopted, so the construction period can be shortened. Moreover, since the amount of steel frames used for temporary columns is less than the amount of steel frames used for steel frames and steel-framed reinforced concrete columns, an increase in cost can be suppressed.

  The building frame according to claim 2 is a building frame having a reinforced concrete column and a steel beam, and the frame includes a column unit provided with a beam joint, and a beam joint of the column unit. The column unit includes a steel column, a column bar supported by the steel column, the beam joint provided to the steel column and the column unit being connected to the column member. And a cylindrical sheath tube to be inserted, and the sheath tube is supported by the steel column via a plate (for example, a lower reinforcing plate 136 described later).

  According to the present invention, a steel column is prepared, and column bars are supported by the steel column. Furthermore, a cylindrical sheath tube is provided on the steel column, and a column bar is inserted into the sheath tube and a beam joint is joined to form a column unit. Then, the pillar unit and the beam member are erected by the erection method. Therefore, even if the pillar is a reinforced concrete building, the construction escape method can be adopted, so the construction period can be shortened. Moreover, since the amount of steel frames used for temporary columns is less than the amount of steel frames used for steel frames and steel-framed reinforced concrete columns, an increase in cost can be suppressed.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a side view showing a part of a frame of a building 1 to which a frame assembly method according to an embodiment of the present invention is applied.

  Building 1 is a shopping center, from 1st floor to 3rd floor is a store, 4th floor and 5th floor are parking lots. The pillars 2 from the first floor to the third floor of this building are reinforced concrete with a built-in steel temporary pillar, and the pillars 3 on the fourth and fifth floors are steel. Moreover, all the beams 4 are steel structures. The floor 5 from the second floor to the R floor is formed by laying a deck plate on the steel beam 4 and placing the concrete.

FIG. 2 is a steel frame diagram of a part of the frame of the building 1.
The steel frame from the first floor to the third floor of the building 1 includes a column unit 10 provided with a beam joint 14 and a steel beam member 20 joined to the beam joint 14 of the column unit 10. .
Here, as shown in FIG. 2, the pillar unit 10 includes a first node pillar unit 10A having a height of one layer from the first floor level to the second floor rise, and from the second floor rise to the fourth floor rise. And a second node unit 10B having a height of two layers.
Further, the steel frames of the fourth floor and the fifth floor of the building 1 include a steel column member 30 from the 4th floor rising to the R floor level, and a steel beam member 40 joined to the column member 30. Composed.

FIG. 3 is a plan sectional view of the column unit 10. 4 and 5 are side views of the column unit 10.
The column unit 10 is provided with a temporary column 11 as a steel column extending in the vertical direction, four beam joints 14 extending in the horizontal direction, column bars 12 supported by the temporary column 11, and a beam provided on the temporary column 11. And a tubular sheath tube 13 into which the joint 14 is joined and the column bar 12 is inserted.

The column reinforcement 12 includes twelve column reinforcements 121 and a plurality of strip reinforcements 122 wound at predetermined intervals along the extending direction of the column reinforcements 121.
Three column main bars 121 are arranged at each corner of the column of the building 1.

  Temporary column 11 is H steel, lower temporary column 111, intermediate temporary column 112 bolted to lower temporary column 111 via plate 114, and bolted to intermediate temporary column 112 via plate 115. And an upper temporary pillar 113.

  Reinforcing bar support members (not shown) that are angle members for supporting the column main bars 121 are welded to the flange surfaces of the temporary columns 11. The temporary column 11 supports the column main bar 121 via the reinforcing bar support member by arranging the three column main bars 121 arranged at the corners of the column with the reinforcing bar support member interposed therebetween.

  The sheath tube 13 includes a cylindrical portion 131 having a substantially square cylindrical shape extending in the vertical direction, and a lower diaphragm 132 and an upper diaphragm 133 that block the upper and lower end surfaces of the cylindrical portion 131.

  A substantially circular concrete filling hole 134 is formed at the center of the two diaphragms 132 and 133. The intermediate temporary pillar 112 is inserted into the concrete filling hole 134, and thereby the intermediate temporary pillar 112 is exposed above and below the sheath tube 13.

  The intermediate temporary column 112 is fixed to the upper diaphragm 133 by the steady rest 135 and is fixed to the lower diaphragm 132 by the lower reinforcing plate 136. The steady rest 135 is an angle member, one surface is welded to the upper diaphragm 133 in three rounds, and the other surface is bolted to the intermediate temporary column 112. The lower reinforcing plate 136 is welded to the lower diaphragm 132 on one end side and is welded to the intermediate temporary column 112 on the other end side.

  Also, column reinforcement through holes 137 through which the column main reinforcement 121 is inserted are formed at the four corners of the two diaphragms 132 and 133. This columnar through hole 137 is formed at a position where the column main reinforcement 121 passes through the inside of the cylindrical portion 131 of the sheath tube 13.

  The beam joint 14 is H steel, and includes a lower flange 141 welded to the lower diaphragm 132, a web 142 welded to the outer peripheral surface of the cylindrical portion 131, and an upper flange 143 welded to the upper diaphragm.

Next, a procedure for manufacturing the above column unit 10 will be described with reference to FIGS. 6 (a) and 6 (b).
A pair of mounts 6 are provided in the column unit production yard.
The temporary column 11, the sheath tube 13, and the beam joint 14 are assembled as a column piece 7 in a steel frame manufacturing factory, and this column piece 7 is carried into a building site by a trailer or the like. The column piece 7 is placed on the gantry 6 in a state of being laid, and in this state, the column reinforcement 12 is arranged, and a welding scaffold 8 for performing welding or bolting is attached. Further, a reinforcing bar sleeve 9 for connecting the column main bar 121 is attached to the lower end of the column main bar 121 of the column bar 12.

Next, the procedure of the building work of the building 1 will be described with reference to FIG.
First, the building frame is divided into a plurality of work zones in plan view. Here, it is divided into A zone, B zone, and C zone in increments of 3 spans.
First, as shown in FIG. 7, for the A section, the column unit 10 is assembled, and the column unit 10, the column member 30, the beam members 20 and 40 are lifted using a crawler crane 50 as a lifting machine, Perform construction work up to the top floor.
This construction work is repeated for each adjacent work section from the A section on the back side of the flow line of the crawler crane 50 toward the C section on the near side.

Next, the construction procedure for each work area of the building 1 will be described with reference to FIGS.
First, as shown in FIG. 8 (a), the first node unit 10A is erected. Specifically, the first knot post unit 10A is lifted by a crawler crane, the first knot post unit 10A is fixed to the first floor with an anchor bolt (not shown), and a conservative wire is stretched.

  Next, as shown in FIG. 8 (b), after the beam members 20 on the second floor are attached, the distortion is corrected and these beam members 20 are finally tightened.

  Next, as shown in FIG. 8 (c), the second node unit 10B is erected, and as shown in FIG. Then, these beam members 20 are finally tightened.

  Next, as shown in FIG. 9 (b), the column member 30 of the third section is erected, and, as shown in FIG. Repair is performed, and these beam members 40 are finally tightened.

  Next, as shown in FIG. 10 (a), a scaffold 51 is assembled around the first-floor pillar, and the formwork 52 of the first-floor pillar is built, and the deck plate is laid and arranged on the second floor Work and put concrete on the 1st floor pillar and 2nd floor. Thereby, as shown in FIG.10 (b), the 1st floor pillar 2 and the 2nd floor 5 are formed.

  In the same procedure, as shown in FIG. 10 (c), the second floor pillar 2 and the third floor 5 are formed, and further, the third floor pillar 2 and the 4th to Rth floors 5 are formed.

According to this embodiment, there are the following effects.
(1) The temporary pillar 11 is prepared, and the pillar 12 is supported on the temporary pillar 11. Further, a cylindrical sheath tube 13 is provided on the temporary column 11, and the column main bar 121 is inserted into the sheath tube 13 and the beam joint 14 is joined to form the column unit 10. Then, the pillar unit 10 and the beam member 20 are erected by the erection method.
Therefore, even if the pillar 2 is a reinforced concrete building 1, the construction escape method can be adopted, so that the construction period can be shortened. Moreover, since the amount of steel frames used for the temporary columns 11 is smaller than the amount of steel frames used for steel frames or steel-framed reinforced concrete columns, an increase in cost can be suppressed.

It should be noted that the present invention is not limited to the above-described embodiment, and modifications, improvements, etc. within a scope that can achieve the object of the present invention are included in the present invention.
For example, in the present embodiment, as the column unit 10, the first node column unit 10A having a height of one layer and the second node column unit 10B having a height of two layers are provided. Absent. For example, if the height of the column unit is three layers, the construction period can be further shortened, and the number of joints of the column main reinforcing bars can be reduced, thereby reducing the cost.
Moreover, after constructing from the first floor to the third floor, construction may be performed in the order of the R floor, the fifth floor, and the fourth floor. In this way, if the top floor slab or roof is constructed first, the lower floor can be constructed without being influenced by the weather, and the construction efficiency can be improved.

  In the present embodiment, the reinforcing plate 136 is provided only on the lower surface of the sheath tube 13 and the steady rest 135 is provided on the upper surface of the sheath tube 13 so that the lower surface of the sheath tube 13 is supported by the temporary column 11. Not limited to. In other words, reinforcing plates may be provided on the upper and lower surfaces of the sheath tube 13, and the upper and lower surfaces of the sheath tube 13 may be supported by the temporary column 11, or a reinforcing plate may be provided only on the upper surface of the sheath tube 13. May be provided with a steady rest, and the upper surface of the sheath tube 13 may be supported by the temporary column 11.

In this embodiment, the pillar 2 of the building 1 is reinforced concrete. However, a temporary pillar may be used for the main construction to form a steel-framed reinforced concrete structure.
Moreover, although the floor 5 of the building 1 is formed of cast-in-place concrete, the present invention is not limited thereto, and the floor 5 may be half precast concrete (half PC) or full precast concrete (full PC). In this way, the construction period can be further shortened.
Moreover, although the brace is not provided in the 4th and 5th floors of the building 1, it is not limited to this, and a brace may be provided.

In the present embodiment, the four beam joints 14 are provided in the column unit 10. However, the present invention is not limited to this, and the number of beam joints may be determined as appropriate.
Further, although the beam joint 14 is made of H steel, the present invention is not limited to this, and the beam joint may be made of only a gusset plate.

Further, the number of column main bars 121 of the column unit 10 is twelve, and three column main bars 121 are arranged at the corners of the column. However, the present invention is not limited to this, and the number and position of the column main bars may be appropriately determined. .
Although the temporary pillar 11 is made of H steel, the present invention is not limited to this, and two C channel materials may be welded back to back to form a temporary pillar.
In this embodiment, the temporary pillar 11 is provided on the pillar 2 from the first floor to the third floor. However, the present invention is not limited to this, and a temporary pillar may be provided on the middle floor pillar such as from the second floor to the third floor. Good.

It is a side view which shows a part of building frame to which the frame assembly method which concerns on one Embodiment of this invention was applied. It is a steel-frame figure of a part of frame of the building which concerns on the said embodiment. It is a plane sectional view of the pillar unit concerning the embodiment. It is a side view of the pillar unit which concerns on the said embodiment. It is a side view of the pillar unit which concerns on the said embodiment. It is a figure for demonstrating the procedure which manufactures the pillar unit which concerns on the said embodiment. It is a figure for demonstrating the building procedure of the building which concerns on the said embodiment. It is a figure for demonstrating the construction procedure to the 2nd node pillar construction for every work area of the building which concerns on the said embodiment. It is a figure for demonstrating the construction procedure until the construction completion for every construction area of the building which concerns on the said embodiment. It is a figure for demonstrating the construction procedure until the concrete placement completion for every construction area of the building which concerns on the said embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Building 2 Column 4 Beam 10 Column unit 11 Temporary column 12 Column reinforcement 13 Sheath pipe 14 Beam joint 20 Beam member 50 Crawler crane (lifter)

Claims (2)

A frame assembly method for assembling a frame of a building having reinforced concrete columns and steel beams,
The frame includes a column unit provided with a beam joint, and a beam member joined to the beam joint of the column unit,
The column unit includes a steel column, a column bar supported by the steel column, and a cylindrical sheath tube provided on the steel column to which the beam joint is joined and the column bar is inserted. Consisting of
Using a lifting machine, lifting the grounded column unit and beam member to build up to the top floor, and assembling the frame while sequentially repeating the building work for each adjacent work area The frame assembly method. A frame of a building having reinforced concrete columns and steel beams,
The frame includes a column unit provided with a beam joint, and a beam member joined to the beam joint of the column unit,
The column unit includes a steel column, a column bar supported by the steel column, and a cylindrical sheath tube provided on the steel column to which the beam joint is joined and the column bar is inserted. And
The building frame is characterized in that the sheath tube is supported by the steel column through a plate.

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