JP2012036584A - Arrangement method of reinforced concrete column - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reinforcing bar arrangement method capable of improving the erection accuracy of a reinforcement unit even when the reinforcement unit is configured with a surface as a unit.SOLUTION: The representative configuration of the arrangement method of a reinforced concrete column related to this invention is the arrangement method of the reinforced concrete column for fixing the reinforcement unit 200 for which main reinforcements 202 and tie hoops 204 are assembled to a reinforcement frame 100 which is a skeleton. A hole 115 is provided on a position to fix the main reinforcement 202 of the reinforcement unit 200 of an outer beam 114 of the reinforcement frame 100, the reinforcement frame 100 including the outer beam 114 is constructed, the main reinforcements 202 and the tie hoops 204 are assembled to construct the reinforcement unit, the reinforcement unit 200 is disposed to the side face of the reinforcement frame 100, and the main reinforcements 202 of the reinforcement unit 200 are bound by a binding wire 130 inserted to the hole 115 of the outer beam 114 of the reinforcement frame 100.

Description

  The present invention relates to a bar arrangement method for arranging bars using a reinforcing bar unit in a reinforced concrete column.

  A reinforced concrete column is a column in which reinforcing bars are arranged inside the concrete. A reinforcing bar is comprised from the main reinforcement extended in an axial direction (up-down direction), and the band reinforcement extended in the direction (horizontal direction) orthogonal to a main reinforcement. However, the number of reinforcing bars used for reinforced concrete columns is large, and the work requires a corresponding number of man-hours and days. In particular, in the case of a high column, since there is a limit to the height at which the concrete is hit at a time, the joining is performed. Then, the bar arrangement work at a high position is a work that requires more labor.

  Therefore, conventionally, it has been proposed to use a reinforcing bar unit in which main bars and band bars are combined in advance (for example, Patent Document 1). In Patent Document 1, a reinforcing bar unit is formed by previously assembling a column reinforcing bar (main reinforcing bar) to be incorporated into one or a plurality of continuous columns and a beam reinforcing bar (strip reinforcing bar) to be joined to the main reinforcing bar. There has been proposed an assembling method for attaching a reinforcing bar unit to a predetermined position on the floor at the same time as or after placing the floor in the object. According to Patent Document 1, when assembling column bars and beam bars, it is possible to eliminate work at a high place and shorten the construction period of the entire building.

  By the way, in a power plant such as a thermal power plant or a nuclear power plant, a turbine building is constructed to accommodate the turbine and the generator. Turbine and generators are extremely heavy, and reinforced concrete frame foundations are built to support them, but their pillars are much thicker than those of ordinary buildings such as office buildings and condominiums. For example, it becomes about 2 m × 3 m. Also, the reinforcing bars used are thicker than ordinary buildings. Therefore, if a plurality of pillars or the entire pillars are combined into a reinforcing bar unit as described in Patent Document 1, the weight becomes excessive and it is difficult to hang it with a crane.

  On the other hand, Patent Document 2 proposes a reinforcing bar unit in which reinforcing bars (principal bars or strips) are arranged in parallel using caulking metal fittings on an aggregate (angle material). That is, the reinforcing bar unit is unitized not by the entire column but by the column surface. The reinforcing bar unit is vertically and horizontally coupled to a steel frame (rebar mount) using H-shaped steel to constitute a reinforcing bar. According to Patent Document 2, it is stated that the assembling property, safety, and bar arrangement accuracy are improved and the work period can be shortened.

JP 2003-064875 A Japanese Utility Model Publication No. 62-43043

  When the reinforcing bar unit is configured with the surface as a unit, the reinforcing bar unit is suspended by a crane and fixed to the reinforcing bar mount with a binding wire. The position of the reinforcing bar is usually marked on the reinforcing bar base using chalk or the like.

  However, unlike a reinforcing bar unit in which the entire column is unitized, when the unit is configured in units of surfaces, the mounting accuracy with respect to the reinforcing bar mount becomes a problem. That is, even if the rebar unit can be assembled with high accuracy, there is a possibility that a displacement occurs when the rebar unit is attached to the rebar mount or the rebar unit is inclined overall. In particular, in the case of a high column, the vertical length of the reinforcing bar unit is also long. If the rebar unit is displaced or tilted, the concrete cover thickness will be insufficient, or the rebar will not be able to be joined at the joint.

  If the rebar unit is tilted or misaligned, adjust the position by pushing it with a formwork or pushing it with a crane. However, since the rebar pedestal is a heavy object, the fine adjustment of the position does not remain, and there is a problem that it is difficult to improve the erection accuracy.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a reinforcing bar arrangement method that can improve the accuracy of building up a reinforcing bar unit even when the reinforcing bar unit is configured in units of surfaces.

  A representative configuration of a reinforcing bar arrangement method for a reinforced concrete column according to the present invention is a reinforcing bar method for a reinforced concrete column that fixes a reinforcing bar unit in which a main bar and a reinforcing bar are assembled to a reinforcing bar frame, which is a frame, A hole is provided at the position where the main bar of the reinforcing bar unit should be fixed, a reinforcing bar frame including the beam material is constructed, a reinforcing bar unit is constructed by assembling the main bar and the band, and the reinforcing bar unit is arranged on the side of the reinforcing bar frame. It is characterized in that the main reinforcing bars of the reinforcing bar unit are bound by a binding wire that passes through a hole in the beam of the gantry.

  According to the above configuration, even when the reinforcing bar unit is configured in units of surfaces, it is possible to easily perform positioning when fixing the reinforcing bar unit to the reinforcing bar mount, and to improve the erection accuracy. .

  In the above method, it is preferable that the reinforcing bar gantry is constructed for each joint of the concrete in the vertical direction, and the beam material provided with holes is arranged in the vicinity of the upper end of the reinforcing bar gantry. The reinforcing bar unit is attached to the reinforcing bar base every time the concrete is spliced. By positioning each reinforcing bar base in the vicinity of the upper end, the rebar unit can be effectively prevented from tilting and at the time of the next splicing. The position of the main muscle can be arranged accurately, and the main muscle can be smoothly joined.

  In the above method, it is preferable that the lower end of the main reinforcing bar of the reinforcing bar unit is bound to the reinforcing bar protruding upward from the foundation concrete or the joint surface. Thereby, since the lower end of a reinforcing bar unit can be located easily and the upper end can be positioned by said hole, the built-in accuracy of a reinforcing bar unit can be improved as a whole.

  According to the present invention, even when the reinforcing bar unit is configured in units of surfaces, positioning when the reinforcing bar unit is fixed to the reinforcing bar base can be easily performed, and erection accuracy can be improved. .

It is a figure explaining the reinforcement of a reinforced concrete pillar. It is a perspective view of the upper part of a reinforcing bar stand. It is a perspective view explaining the structure of a reinforcing bar unit. It is a top view which shows the state which attached the main reinforcement and the reinforcement unit to the reinforcement frame. It is a figure explaining the hole provided in the beam material (outer beam, inner beam) of a reinforcement frame. It is a figure explaining the lower end of a reinforcing bar unit. It is a flowchart explaining the main flows of a bar arrangement method.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The dimensions, materials, and other specific numerical values shown in the embodiments are merely examples for facilitating understanding of the invention, and do not limit the present invention unless otherwise specified. In the present specification and drawings, elements having substantially the same function and configuration are denoted by the same reference numerals, and redundant description is omitted, and elements not directly related to the present invention are not illustrated. To do.

  FIG. 1 is a diagram for explaining the arrangement of reinforced concrete columns. The reinforced concrete column shown in FIG. 1 is a column used in a turbine building of a power plant, and is a thick column having a cross section of about 2 m × 3 m. Therefore, in the present embodiment, reinforcement is performed by fixing the main reinforcement 198 and the reinforcing bar unit 200 including the main reinforcement 202 and the band reinforcement 204 to the four surfaces of the reinforcement base 100, respectively. After the bar arrangement, formwork is formed around the bar arrangement and concrete is placed. In the present embodiment, the construction of the bar arrangement will be described.

  The reinforcing bar base 100 will be described with reference to FIGS. 1 and 2. FIG. 2 is a perspective view of the upper part of the reinforcing bar rack 100. The reinforcing bar base 100 is a framework for fixing and supporting the reinforcing bar unit 200. In the reinforcing bar 100, a frame (frame body) is configured by attaching an inner beam 112 and an outer beam 114 as beam members to column members 110 installed vertically in four corners. The column member 110, the inner beam 112, and the outer beam 114 can all use angle members (angle-shaped steel), and have a C-shaped cross section or a lip groove formed by folding a C-shaped edge. Shape steel can be used. In this embodiment, an angle material is used as an example for illustration and description. The reinforcing bar 100 is appropriately provided with a brace 180, a ladder 182 for an operator to move up and down, and the like.

  As shown in FIG. 1, the inner beam 112 is stretched over the column member 110 to form a rectangular frame (inner frame). A plurality of main bars 198 using reinforcing bars having substantially the same diameter as the main bar 202 of the reinforcing bar unit 200 are arranged and fixed on the outer periphery (four surfaces) of the inner beam 112 (in FIG. 2, the outer beam 114 is drawn). However, the main muscle 198 is omitted). Here, the reason why the main bar 198 attached to the inner beam 112 is not attached to the main bar 198 is only because it is unnecessary in the strength calculation in the example of the present embodiment, and it does not exclude that the main bar 198 is also attached to the main bar 198. . The main bars 198 are fixed to the inner beam 112 one by one after the inner beam 112 is constructed and before the outer beam 114 is attached.

  The outer beam 114 is fixed to the outside of the inner beam 112 with a brace, thereby forming a rectangular frame (outer frame) so as to surround the inner beam 112. The reinforcing bar unit 200 is fixed to the outer beam 114. The outer beam 114 may be provided so as to correspond to the inner beams 112 of all the stages, but in this embodiment, one outer beam 114 is attached to each of the two stages of inner beams 112.

  The reinforcing bar unit 200 will be described with reference to FIGS. 1 and 3. FIG. 3 is a perspective view illustrating the configuration of the reinforcing bar unit.

  The reinforcing bar unit 200 is fixed to the outer periphery (four surfaces) of the outer beam 114 of the reinforcing bar base 100. The reinforcing bar unit 200 is a unit configured by joining (welding) main bars 202 and band bars 204 in a lattice shape. The main reinforcement 202 is provided for enhancing the bending rigidity of the column, and the band reinforcement 204 is provided for enhancing the shear rigidity. Therefore, a reinforcing bar with a large diameter is used for the main reinforcing bar 202, and a reinforcing bar with a small diameter is used for the strap 204.

  An end portion of the band 204 is bent into a U shape, and a joint portion 205 extending toward an adjacent surface is formed. When the reinforcing bar unit 200 is fixed to the reinforcing bar base 100, the joint portion 205 is along the band 204 of the reinforcing bar unit 200 on the adjacent surface orthogonal thereto.

  FIG. 4 is a plan view showing a state in which the main reinforcing bar 198 and the reinforcing bar unit 200 are attached to the reinforcing bar base 100. The rebar unit 200 assembled as described above is suspended by a crane as shown in FIG. 1 and arranged along the side surface (outer beam 114) of the rebar pedestal 100. In this state, the reinforcing bar unit 200 is fixed by binding the main bar 202 to the outer beam 114. Further, the joint portion 205 of the strap 204 is welded or tied to the strap 204 of the adjacent reinforcing bar unit 200 and joined together.

  Here, in the reinforcing bar base 100 according to the present embodiment, holes 115 and 113 are provided in the outer beam 114 and the inner beam 112, and the main bars 202 and 198 are fixed by a binding wire 130 (see FIG. 5) through the holes. is doing.

  FIG. 5 is a diagram for explaining the holes provided in the beam members (outer beam 114 and inner beam 112) of the reinforcing bar base 100. FIG. The outer beam 114 is provided with a hole 115 through which the binding wire 130 is inserted at a position where the main reinforcing bar 202 of the reinforcing bar unit 200 is to be fixed. Similarly, the inner beam 112 is provided with a hole 113 for inserting the binding wire at a position where the main bar 198 is to be fixed. FIG. 5 is an enlarged view, but refer also to FIG. 4 for the overall arrangement of the holes 115 and 113.

  FIG. 6 is a view for explaining the lower end of the reinforcing bar unit 200. When the reinforcing bar 100 and the reinforcing bar unit 200 are installed, the reinforcing bar 142 is overlaid on the foundation concrete or the concrete column 140 constructed previously. In any case, the reinforcing bar 142 protrudes from the lower structure. Is provided. When connecting, the reinforcing bar 142 is the upper end of the main bar 202 of the lower reinforcing bar unit 200. Then, by binding the lower end of the main reinforcing bar 202 of the reinforcing bar unit 200 to the insertion bar 142, the lower end of the reinforcing bar unit 200 can be fixed without causing a positional shift.

  According to the above configuration, even when the reinforcing bar unit 200 is configured in units of planes, positioning when the reinforcing bar unit 200 is fixed to the reinforcing bar base 100 can be easily performed, tilting is prevented, and building is performed. Can be improved. Therefore, the cover thickness does not become insufficient, and the position of the incision bar does not shift when the upper part is joined.

  In the present embodiment, the holes 115 and 113 are all of the outer beams 114 and the inner beams of the plurality of beam members (outer beams 114 and inner beams 112) arranged in the vertical direction. It is provided on the beam 112 (see FIG. 1). However, the inclination of the reinforcing bar unit 200 can be prevented by providing the holes 115 and 113 only in the uppermost beam member. In addition, the beam material in the vicinity of the upper end of the reinforcing bar gantry 100 (for example, the second tier from the top) is not necessarily required.

  That is, since the reinforcing bar base 100 and the reinforcing bar unit 200 are constructed for every jointing of concrete in the vertical direction, a beam member (having holes 115 and 113 provided in the vicinity of the upper end of the reinforcing bar base 100 in the unit of the jointing) It is only necessary that the outer beam 114 and the inner beam 112) be arranged. Each time the reinforcing bar unit 200 is fixed to the reinforcing bar base 100, positioning near the upper end thereof can effectively prevent the inclination of the reinforcing bar unit 200, and the position of the main reinforcing bar 202 at the time of the next joining can be accurately determined. The main muscle 202 can be smoothly joined.

  In the present embodiment, the inner beam 112 is described as being provided with the hole 113, but the inner beam 112 is not necessarily provided with the hole 113. This is because if the main bars 198 are fixed one by one, the weight is not so great, and the position correction is not difficult.

  FIG. 7 is a flowchart for explaining the main flow of the bar arrangement method.

  First, holes are provided in the beam materials (outer beam 114, inner beam 112) used for the reinforcing bar base 100 at positions where the main bars 202, 198 should be fixed (step 300). Next, the backbone (inner frame) of the reinforcing bar 100 is constructed using the inner beam 112 (step 302). The main bar 198 is placed along the inner beam 112, and is bound and fixed by a binding wire 130 passed through the hole 113 of the inner beam 112 (step 304). Then, the outer beam 114 provided with a hole in step 300 is attached to the outside of the inner beam 112 (step 306).

  In parallel with the above steps 300 to 306, the reinforcing bar unit 200 is manufactured by assembling the main bar 202 and the band 204 (step 308). Either the construction of the reinforcing bar base 100 or the production of the reinforcing bar unit 200 may be performed first, and parallel work is also possible. Further, the reinforcing bar unit 200 may be manufactured and stocked as much as necessary.

  Then, the reinforcing bar unit 200 is suspended by a crane and is placed along the reinforcing bar base 100 (step 310). In this state, the lower end of the main reinforcing bar 202 of the reinforcing bar unit 200 is bound to the insertion bar 142, and the lower end of the reinforcing bar unit 200 is positioned (step 312). Then, the vicinity of the upper end of the main bar 202 is bound by the binding wire 130 that passes through the hole 115 of the outer beam 114 (step 314). Further, also in the outer beam 114 at the other stage, the main bar 202 is fixed by the binding wire 130.

  When the bar arrangement is completed as described above, a mold is made around the bar and concrete is placed (step 316). In this way, it is possible to increase the accuracy of reinforcement arrangement and to construct a high-quality reinforced concrete column.

  As mentioned above, although preferred embodiment of this invention was described referring an accompanying drawing, it cannot be overemphasized that this invention is not limited to the example which concerns. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the claims, and these are naturally within the technical scope of the present invention. Understood.

  For example, although it demonstrated as a pillar of a turbine building in the said embodiment, if it is a reinforcing bar arrangement method of the structure which fixes a reinforcing bar unit to a reinforcing bar stand, this invention can be applied and the profit can be enjoyed.

  INDUSTRIAL APPLICABILITY The present invention can be used as a bar arrangement method that uses a reinforcing bar unit for a reinforced concrete column.

DESCRIPTION OF SYMBOLS 100 ... Reinforcement frame, 110 ... Column material, 112 ... Inner beam, 113 ... Hole, 114 ... Outer beam, 115 ... Hole, 130 ... Bundling wire, 140 ... Concrete pillar, 142 ... Inserting bar, 180 ... Brace, 182 ... Ladder , 198 ... main reinforcement, 200 ... reinforcing bar unit, 202 ... main reinforcement, 204 ... band reinforcement, 205 ... joint

Claims (3)

Reinforcement method of reinforced concrete columns that fix a reinforcing bar unit that assembles main and band bars to a reinforced steel frame,
A hole is provided at the position where the main bar of the reinforcing bar unit of the reinforcing bar frame should be fixed,
Build a rebar mount containing the beam material,
Build up the reinforcing bar unit by assembling the main and straps,
Arrange the reinforcing bar unit on the side of the reinforcing bar frame,
A reinforcing bar arrangement method for a reinforced concrete column, wherein the main reinforcing bars of the reinforcing bar unit are bound by a binding wire that is passed through a hole in a beam member of the reinforcing bar base.   2. The reinforced concrete column arrangement according to claim 1, wherein the reinforcing frame is constructed for each joint of concrete in the vertical direction, and the beam material having the holes is arranged in the vicinity of an upper end of the reinforcing frame. Muscle method.   The reinforcing bar method for a reinforced concrete column according to claim 2, wherein the lower end of the main reinforcing bar of the reinforcing bar unit is bound to the basic concrete or the reinforcing bar protruding upward from the joint surface.

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