JP3962320B2 - Construction method of filled steel pipe reinforced concrete columns - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is a steel pipe and filled steel reinforced concrete columns formed from filled reinforced concrete therein (hereinafter, referred to as "RCFT pillar") about the construction how the.
[0002]
[Prior art]
In recent years, the present applicant has developed an RCFT column excellent in fire resistance performance, earthquake resistance performance and economic efficiency, and has been put to practical use. This RCFT column is a column member with increased strength against axial force and horizontal force during earthquake by restraining and reinforcing reinforced concrete with steel pipes at the outer periphery, and the cross-sectional shape can be reduced. Compared with a type concrete steel pipe structure (CFT structure) and a steel structure, it is very excellent in that the cost can be reduced.
[0003]
When constructing this RCFT pillar, normally, a steel pipe corresponding to the height of two or three floors of the structure is integrally manufactured and assembled. Therefore, it is necessary to arrange the reinforcing bars corresponding to the height at the same time, but it is difficult to make the reinforcing bars of that length self-supporting. A method of inserting a reinforcing bar rod from the upper end opening with a crane or the like is employed (for example, see Patent Document 1).
[0004]
[Patent Document 1]
Japanese Patent Laid-Open No. 2002-37583 (pages 2 to 3 and FIG. 3)
[0005]
[Problems to be solved by the invention]
However, in the above method, the work of inserting the reinforcing bar rod into the lower steel pipe or the reinforcing rod rod provided with the diaphragm (through diaphragm or inner diaphragm) built in advance is performed. In some cases, the tip of the reinforcing bar rod may come into contact with a reinforcing bar rod or the like that has been built in advance, which hinders the smooth operation of the rod and lowers the work efficiency. There was a problem that it might be.
[0006]
The present invention has been made to solve the above problems, and an object thereof is to provide an easy and construction how the rapid construction can be made RCFT column.
[0007]
[Means for Solving the Problems]
This invention for solving the said subject provides the construction method of the filling type steel pipe reinforced concrete pillar formed from the steel pipe and the reinforced concrete with which it was filled , characterized by including the following each process. .
(1) It has a plurality of axial main reinforcing bars and straps surrounding each axial main reinforcing bar, and the lower end thereof is in the same direction as the axial main reinforcing bar, and the front end is bent inward. A suspension / position holding member is attached to an upper end portion of the predetermined main axial reinforcing bar of a reinforcing bar rod on which a predetermined number of guide reinforcing bars are projected, and the suspension / position holding member is used to insert the suspension holding position holding member into the steel pipe. Inserting a reinforcing bar rod, hooking the suspension and position holding member on the upper edge of the steel pipe, and positioning the lower end portion of the reinforcing bar rod so that it protrudes from the steel pipe. Steel pipe assembly process for assembling steel pipes.
(2) The rebar built-in steel pipe is suspended to the upper vicinity of the lower filled steel pipe reinforced concrete column, and the tip of the guide rebar is first inserted into the interior of the rebar rod in the lower filled steel pipe reinforced concrete column. And while ensuring the space | interval of the steel pipe in the said lower filling type steel pipe reinforced concrete column, and the steel pipe in the said upper reinforcing steel rod built-in steel pipe, the axial direction main reinforcement of the said upper reinforcing steel rod and the said lower filling type steel pipe reinforced concrete Correct the position of the axial main reinforcing bar in the vertical direction so that the axial main reinforcing bar in the column forms a lap joint, and then hang down the upper steel pipe to join the vertical steel pipes together Reinforced steel frame in which the steel bar built-in steel pipe is built in the upper part of the steel pipe in the lower filled steel pipe reinforced concrete column that has been built in advance Steel pipe Kenkomi process.
(3) A concrete filling step of filling the concrete to a predetermined position inside the built-in reinforcing steel rod built-in steel pipe.
[0008]
Moreover, this invention provides the construction method of the filling type steel pipe reinforced concrete column formed from the steel pipe and the reinforced concrete with which the inside was filled characterized by including the following each process .
(1) A suspension / position holding member is attached to an upper end portion of a predetermined axial main reinforcing bar of a reinforcing bar rod having a plurality of axial main reinforcing bars and a band reinforcing the axial main reinforcing bars, and the hanging The rebar rod is inserted into the steel pipe using the dual-purpose position holding member, and the suspended dual-purpose position holding member is hooked on the upper edge portion of the steel pipe, and the lower end portion of the rebar rod protrudes from the steel pipe. Reinforced rod built-in steel pipe assembling process for assembling the reinforcing steel rod built-in steel pipe by positioning as described above.
(2) A reinforcing bar rod having a predetermined number of guide reinforcing bars protruding inward in the same direction as the axial main reinforcing bars is inserted into the upper ends of the plurality of axial main reinforcing bars. The reinforcing steel rod built-in steel pipe is suspended up to the upper vicinity of the lower filled steel pipe reinforced concrete column provided, and first, the tip of the guide rebar is placed inside the reinforcing steel rod in the upper reinforcing steel rod built-in steel pipe. Inserting and securing the space between the steel pipe in the lower filling type steel pipe reinforced concrete column and the steel pipe in the upper reinforcing steel rod built-in steel pipe, the axial main rebar of the upper reinforcing steel rod and the lower filling type steel pipe The position of the main axial reinforcing bar in the vertical direction is corrected so that the main axial reinforcing bar in the reinforced concrete column forms a lap joint, and then the upper steel pipe is suspended and the steel pipes in the vertical direction are Contact It allows previously on top of the steel pipe in the filled steel reinforced concrete columns of the lower being Tatekoma with, the reinforcing bar cage embedded steel pipe Tatekomu reinforcing bar cage embedded steel pipe Kenkomi step of.
(3) A concrete filling step of filling the concrete to a predetermined position inside the built-in reinforcing steel rod built-in steel pipe.
[0009]
Furthermore, this invention provides the construction method of the filling type steel pipe reinforced concrete column formed from the steel pipe and the reinforced concrete with which the inside was filled characterized by including each following process.
(1) A reinforcing bar rod having a plurality of axial main reinforcing bars and band bars surrounding each of the axial main reinforcing bars, and having a guide portion in which a lower end portion of the axial main reinforcing bar is bent inward. A suspension / position holding member is attached to the upper end portion of the predetermined axial main reinforcing bar, the reinforcing bar rod is inserted into the steel pipe using the suspension / position holding member, and the suspension is attached to the upper edge of the steel pipe. Reinforcing rod-incorporating steel pipe assembly step for assembling the reinforcing bar-incorporating steel pipe by hooking the holding-in position holding member and positioning the lower end of the reinforcing bar to protrude from the steel pipe.
(2) The rebar built-in steel pipe is suspended to the upper vicinity of the lower filled steel pipe reinforced concrete column, and the tip of the guide portion is first inserted into the interior of the rebar rod in the lower filled steel pipe reinforced concrete column. And while ensuring the space | interval of the steel pipe in the said lower filling type steel pipe reinforced concrete column, and the steel pipe in the said upper reinforcing steel rod built-in steel pipe, the axial direction main reinforcement of the said upper reinforcing steel rod and the said lower filling type steel pipe reinforced concrete Correct the position of the axial main reinforcing bar in the vertical direction so that the axial main reinforcing bar in the column forms a lap joint, and then hang down the upper steel pipe to join the vertical steel pipes together Reinforced rod built-in that builds in the above-mentioned steel rod built-in steel pipe in the upper part of the steel pipe in the lower filling type steel pipe reinforced concrete column that has been built in advance Kankenkomi process.
(3) A concrete filling step of filling the concrete to a predetermined position inside the built-in reinforcing steel rod built-in steel pipe.
Moreover, in the construction method of the above-described filled-type steel pipe reinforced concrete column, the guide portion can be configured to be formed by binding the lower end portion of each axial main reinforcing bar with a linear member and bending it inward. .
[0010]
Here, “inside” means the central direction in the cross section of the reinforcing bar rod.
Further, the guide portions in the guide rebar and the axial main rebar are determined in consideration of workability, and the number and size of the guide rebar, the bending angle (the same applies to the guide portion), etc. can be determined appropriately. .
[0011]
According to the present invention, a reinforcing bar rod is provided such that a predetermined number of guide reinforcing bars bent inwardly project at the tip of the reinforcing rod or a guide portion in which the tip of the axial main reinforcing bar is bent inward. Is formed. Accordingly, when performing the operation of inserting the reinforcing bar rod into the joint portion of the lower RCFT column, the guide reinforcing bar or the guide portion is inserted while guiding the main reinforcing bar to the reinforcing rod rod of the lower RCFT column. It is possible to prevent the inserted reinforcing bar from coming into contact with the reinforcing bar of the lower RCFT column and hindering the insertion work.
[0015]
According to the present invention, a reinforcing bar for reinforcing bars inside a steel pipe is unitized as a reinforcing bar rod, and the reinforcing bar rod built-in steel pipe is formed by inserting it in the steel pipe in advance and suspending it in the steel pipe. The embedded steel pipe is integrated into the upper part of the steel pipe in the lower RCFT column. Therefore, it is possible to easily perform the work as compared with the construction method in which the reinforcing bar is pre-constructed and the steel pipe is post-constructed.
Moreover, the insertion work of the said reinforcing rod can be performed efficiently by using the said reinforcing rod.
[0017]
Here, “the steel bar built-in steel pipe is built by inserting the tip of the steel bar into the inner part of the steel bar in the lower RCFT column and then joining the steel pipes in the vertical direction. "In the process of forming a long projecting length from the steel pipe at the tip of the rebar rod and lowering the rebar built-in steel tube, the tip portion is inserted prior to the lower RCFT column as a result. Is also included.
[0018]
According to the present invention, since the installation of the reinforcing bar is completed before the installation of the steel pipe, it is possible to ensure the interval between the lower steel pipe and the upper steel pipe to be installed until the installation of the reinforcing bar is completed. . Therefore, the insertion work of the reinforcing bar is facilitated, and the final state of the joint portion can be visually confirmed, so that the construction work is ensured and the workability can be improved.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described in detail with reference to the drawings.
In the description of each embodiment, the same constituent elements are denoted by the same reference numerals, and redundant description is omitted.
[0020]
<First Embodiment>
The construction method of the RCFT column of the present invention is configured to include each step of (1) rebar built-in steel pipe assembly process, (2) rebar-built steel pipe built-in process, and (3) concrete filling process. The RCFT pillar 10 is constructed by repeating these steps as necessary.
[0021]
(1) Reinforcement rod built-in steel pipe assembly process This step is a process of assembling the reinforcing bar rod built-in steel pipe 20 by pre-assembling the reinforcing bar rod 30 in the ground portion or the like and inserting the reinforcing bar rod 30 into the steel pipe 40. It is a process of performing.
[0022]
[Steel bar]
Since the reinforcing bar rod 30 of this embodiment is arranged inside the cylindrical steel pipe 40, it is a plurality (eight in this embodiment) of threaded reinforcing bars arranged in the circumferential direction (plan view). It is formed from an axial main reinforcing bar 31 and a hoop 32 arranged in a spiral shape surrounding each axial main reinforcing bar 31. A guide reinforcing bar 33 is arranged at the lower end of the axial main reinforcing bar 31 (FIG. 1). The guide reinforcing bars 33 are provided along the outer surface of the axial main reinforcing bar 31 (in the present embodiment, a total of four reinforcing bars 33 are provided along every other axial main reinforcing bar 31).
[0023]
The guide rebar 33 has a linear shape at a portion where it is juxtaposed with the axial main rebar 31, but is bent inwardly (in the direction of the central portion of the rebar rod 30) at the lower portion thereof, and each guide rebar at the tip portion. The trajectory connecting the periphery of 33 has a smaller diameter than the upper cross section of the reinforcing bar rod 30.
The reinforcing bar 30 is formed so as to project a predetermined length from an upper edge portion and a lower edge portion of the steel pipe 40 when inserted into the steel pipe 40, and a tip portion thereof is formed. The upper end of the lower RCFT pillar 10L penetrates a predetermined length.
[0024]
Here, the suspension / position holding member 50 for inserting the reinforcing bar 30 into the steel pipe 40 will be described.
The suspension / position holding member 50 is formed of a steel plate ring plate 51 and a rectangular suspension plate 52 welded to opposing side edge portions of the upper surface portion of the ring plate 51. The ring plate 51 is formed to be slightly larger than the cross-sectional area of the steel pipe 40, and reinforcing bar insertion holes 51a for holding the axial main reinforcing bar 31 are formed at predetermined intervals in the circumferential direction (in this embodiment). 8), a through hole 51b is provided in the central portion. A suspension hole 52 a is formed in a substantially central portion of the suspension plate 52.
[0025]
[Steel pipe]
The steel pipe 40 is cylindrical, and is attached to the outer wall surfaces of the upper end portion and the lower end portion so that the erection pieces 41 and 42 for lifting face each other (reference numerals are the suspension holes 41a and 42a). In addition, an inner diaphragm 43 is provided in the vicinity of the upper edge (FIG. 2).
[0026]
[Reinforced steel pipe built-in steel pipe]
The reinforcing steel rod built-in steel pipe 20 is a member formed integrally by inserting the pre-assembled reinforcing steel rod 30 into the steel pipe 40 (FIG. 2).
The operation of inserting the reinforcing bar 30 into the steel pipe 40 is performed as follows.
First, the suspension / position holding member 50 is attached to the upper end of each axial main reinforcing bar 31 of the reinforcing bar rod 30. The suspension / position holding member 50 is a member that also serves as a positioning jig for the steel pipe 40 while being used to suspend the reinforcing bar 30 during the production of the steel bar built-in steel pipe 20.
[0027]
At this time, the axial main reinforcing bars 31 are inserted into the reinforcing bar insertion holes 51 a of the ring plate 51 in the hanging and holding position holding member 50, and are detachably fixed by the nuts 53. Subsequently, the wire 55 is hung on the suspension hole 52a of the suspension plate 52 in the suspension / holding position holding member 50, and the steel bar 40 is lifted by a crane (not shown) and the upper opening of the steel pipe 40 is erected. Reinforcing bar 30 is inserted from the part. Then, the outer edge portion of the ring plate 51 of the hanging and holding position holding member 50 is hooked on the upper edge portion of the steel pipe 40, and the reinforcing bar rod 30 is positioned to assemble the reinforcing bar rod built-in steel pipe 20.
[0028]
(2) Reinforcement rod built-in steel pipe erection process This step is a step in which the above-described reinforcement rod-embedded steel pipe 20U is built in the upper part of the steel pipe 40L in the lower RCFT column 10L that has been built in advance. (Hereinafter, the upper RCFT pillar 10U and the lower RCFT pillar 10L to be built are distinguished from each other by attaching the upper and lower (reference U) and lower (reference L) names and reference signs).
When performing this step, the tip of the reinforcing bar 30L protrudes from the upper portion of the steel pipe 40L in the lower RCFT column 10L by a predetermined length, and the level of the upper surface is above the steel pipe 40L. Concrete (not shown) is filled so as to match the final installation position of the reinforcing bar 30U.
[0029]
First, the wire 55 is hung on the suspension hole 41a of the upper erection piece 41L in the upper steel pipe 40U (FIG. 3 (a)), and the rebar built-in steel pipe 20U is lifted with a crane (not shown) and inserted. While inserting the guide reinforcing bar 33U of 30U into the inner side of the reinforcing bar rod 30L of the lower RCFT column 10L, it is suspended until it reaches the upper surface of the concrete of the lower RCFT column 10L (FIG. 3 (b)). Then, the position of the axial main reinforcing bar 31U of the upper reinforcing bar rod 30U is appropriately corrected, and the joint portion of the lower reinforcing bar rod 30L with the axial main reinforcing bar 31L is constructed as a lap joint.
[0030]
Subsequently, only the upper steel pipe 40U is suspended (FIG. 4 (a)), placed on the lower steel pipe 40L in the lower RCFT column 10L, and after adjusting the position, the upper erection piece 41L of the lower steel pipe 40L and The lower erection piece 42U of the upper steel pipe 40U is bolted.
Furthermore, a spacer (not shown) is inserted into a predetermined position between the upper reinforcing bar rod 30U and the upper steel pipe 40U at the upper end portion of the upper steel pipe 40U, and the horizontal position of the upper portion of the upper reinforcing bar rod 30U is fixed (see FIG. 4 (b)).
Then, after the work is completed, the suspension / position holding member 50 is removed from the upper reinforcing bar rod 30U.
[0031]
As described above, if the level of the upper surface of the concrete in the lower RCFT column 10L is matched with the final installation of the upper reinforcing bar rod 30U, the positioning operation of the upper reinforcing bar rod 30U can be easily performed.
[0032]
(3) Concrete filling process This process is a process of filling concrete into the upper steel bar built-in steel pipe 20U built.
Concrete filling in this step is performed by appropriately selecting a method using a hopper from the upper part of the upper reinforcing steel rod built-in steel pipe 20U or a method of press-fitting with a pump from the lower part of the upper reinforcing steel rod built-in steel pipe 20U. be able to.
[0033]
According to the present invention, the reinforcing bars for arranging the reinforcing bars inside the steel pipe 40 are unitized as the reinforcing bar rods 30, inserted into the steel pipe 40 in advance and suspended to form the reinforcing bar rod built-in steel pipe 20, and the reinforcing bar rods The built-in steel pipe 20 is integrated into the upper part of the steel pipe 40L in the lower RCFT column 10L. Therefore, it is possible to easily perform the work as compared with the construction method in which the reinforcing bar is pre-constructed and the steel pipe is post-constructed.
[0034]
Moreover, the front-end | tip part of the rebar rod 30 is bend | folded inside (center direction of the rebar rod 30), and the predetermined number of guide rebar 33 with a small cross section is protrudingly provided. Therefore, when performing the operation of inserting the reinforcing bar 30 into the joint portion of the lower RCFT column 10L, the guide reinforcing bar 33 is inserted while guiding the axial main reinforcing bar 31 to the inner side of the lower reinforcing bar 30L or the like. become. Accordingly, it is possible to prevent the inserted reinforcing bar 30 from coming into contact with the lower reinforcing bar 30L in the steel pipe 40L of the lower RCFT column 10L and hindering the insertion work.
[0035]
Furthermore, since the installation of the reinforcing bar 30 is completed before the installation of the upper steel pipe 40U, the interval between the lower steel pipe 40L and the installed upper steel pipe 40U can be secured until the installation of the reinforcing bar is completed. Accordingly, the rebar rod 30 can be easily inserted, and the final state of the lap joint portion can be visually confirmed. Therefore, quality can be ensured and workability can be improved.
[0036]
<Other embodiments>
Heretofore, an example of a preferred embodiment has been described for the present invention. However, the present invention is not limited to the above-described embodiment, and the above-described components can be appropriately modified as follows without departing from the spirit of the present invention.
[0037]
[Rebar bar]
The reinforcing bar 30 'is not provided with a guide reinforcing bar 33, but the tip of the axial main reinforcing bar 31' is fastened with a drawing wire 35 'or the like (FIG. 5), or simply inside (center direction of the reinforcing bar 30'). ), The guide portion 33 ′ can be formed and can be easily inserted into the joint portion with the lower RCFT column 10L.
Further, at the position where the reinforcing bar 32 ′ forming the reinforcing bar 30 ′ intersects the axial main reinforcing bar 31 ′ and changes its direction, a protrusion 32 a of the reinforcing bar 32 is formed, and the diaphragm 43 and There is a risk of contact. Therefore, a predetermined number of reinforcing bars 36 in the same direction as the axial main reinforcing bar 31 ′ may be provided so as to cover the protruding portion 32a.
[0038]
Furthermore, although the said 1st Embodiment demonstrated the case where the guide reinforcing bar 33 was provided in the lower end part of the reinforcing bar rod 30, the reinforcing bar in which the guide part 33 '' (guide reinforcing bar may be sufficient) is provided in the upper end part.籠 30 ″ may be used (FIG. 6).
In this case, when the upper reinforcing bar rod 30U ″ is inserted into the joint portion of the lower RCFT column 10L ″, the lower reinforcing bar rod 30L is caused by the presence of the guide portion 33L ″ of the lower reinforcing bar rod 30L ″. The axial rebar 31L '' of '' will be guided to the inner side of the axial main rebar 31U '' of the upper rebar bar 30U '' (reference numeral 20 '' indicates a steel bar built-in steel pipe).
[0039]
[Hanging and holding position holding member]
The hanging and holding position holding member 50 only needs to have a structure capable of reliably fixing the main axial reinforcing bar of the reinforcing bar rod 30.
For example, in the hanging and holding position holding member 50 of the first embodiment, a pipe body 61 communicating with the reinforcing bar insertion hole 51 a is welded to the ring plate 51, and tightened to the side surface portion of the pipe body 61 via a nut 62. It can also be set as the structure which provides the volt | bolt 63. FIG. According to the suspension / position holding member 60, the main reinforcing bar 31 'is inserted into the pipe body 61 and fixed by the fastening bolt 63, so that the reinforcing bars other than the screw joint reinforcing bar can be fixed (see FIG. 5).
Further, without providing the ring plate 51, the suspension plate 72 welded to the nut 71 is used as the suspension / position holding member 70, and the axial main reinforcing bars 31 that are screw joints are fixed by the nut 71. (Fig. 7).
[0041]
[Others]
Also, the shape and dimensions of the steel pipe forming the RCFT pillars are those that can arbitrarily determined, can be determined as the shape of the reinforcing bar cage is also corresponding to the steel pipe.
[0042]
【The invention's effect】
According to the present invention, it is possible to provide a construction how the RCFT Columns can be easily and quickly construction.
[Brief description of the drawings]
FIGS. 1A and 1B are views showing a state in which a suspension / position holding member is attached to a reinforcing bar rod according to the present invention, wherein FIG. 1A is a side view, and FIG. 1B is a cross-sectional view taken along line XX in FIG. (c) is a YY sectional view in (a).
FIG. 2 is a side cross-sectional view showing a steel bar built-in steel pipe.
FIGS. 3 (a) and 3 (b) are side views showing a steel bar built-in steel pipe installation process.
4 (a) and 4 (b) are side views showing a steel bar built-in steel pipe installation process for both (a) and (b).
FIG. 5A is a side cross-sectional view showing a state in which a suspension / position holding member (another embodiment) is attached to a reinforcing bar rod of the present invention (another embodiment), and FIG. It is ZZ sectional drawing of (a).
FIG. 6 is a side view showing a steel bar built-in steel pipe (another embodiment).
FIG. 7 is a plan view showing a steel bar built-in steel pipe (another embodiment).
[Explanation of symbols]
10 RCFT pillars 20, 20 ″ rebar built-in steel pipes 30, 30 ′, 30 ″ rebar rods 31, 31 ′, 31 ″ axial main rebar 32 band rebar 33 guide rebar 33 ′, 33 ″ guide part 35 'Drawing wire 40 Steel pipe 43 Inside diaphragm 50, 60, 70 Suspension / position holding member 51 Ring plate 52 Suspension plate 51a Reinforcing bar insertion hole 61 Pipe body 63 Tightening bolt 72 Suspension plate

Claims (4)

The construction method of the filling type steel pipe reinforced concrete column formed from the steel pipe and the reinforced concrete with which the inside was filled including the following processes.
(1) It has a plurality of axial main reinforcing bars and straps surrounding each axial main reinforcing bar, and the lower end thereof is in the same direction as the axial main reinforcing bar, and the front end is bent inward. A suspension / position holding member is attached to an upper end portion of the predetermined main axial reinforcing bar of a reinforcing bar rod on which a predetermined number of guide reinforcing bars are projected, and the suspension / position holding member is used to insert the suspension holding position holding member into the steel pipe. Insert a reinforcing bar
Reinforcement rod assembly for assembling a reinforcing steel rod built-in steel pipe by hooking the hanging and holding position holding member on the upper edge portion of the steel pipe and positioning the lower end portion of the reinforcing bar rod to protrude from the steel pipe Steel pipe assembly process.
(2) Hang the rebar built-in steel pipe to the upper vicinity of the lower filled steel pipe reinforced concrete column,
First, the tip of the guide reinforcing bar is inserted into a reinforcing bar in the lower filled steel pipe reinforced concrete column, a steel pipe in the lower filled steel pipe reinforced concrete column, and a steel pipe in the upper reinforcing steel rod built-in steel pipe, Of the upper and lower axial main reinforcing bars so that the axial main reinforcing bars of the upper reinforcing steel rods and the axial main reinforcing bars of the lower filled steel pipe reinforced concrete columns form a lap joint. Correct the position,
Thereafter, the down hanging the upper steel tube by joining the steel pipes of the vertical direction, the upper portion of the steel pipe in the filled steel reinforced concrete columns of the lower being Tatekoma prior, the reinforcing bar cage assembly Reinforced steel pipe built-in steel pipe erection process to build in the steel pipe.
(3) A concrete filling step of filling the concrete to a predetermined position inside the built-in reinforcing steel rod built-in steel pipe. The construction method of the filling type steel pipe reinforced concrete column formed from the steel pipe and the reinforced concrete with which the inside was filled including the following processes.
(1) A suspension / position holding member is attached to an upper end portion of a predetermined axial main reinforcing bar of a reinforcing bar rod having a plurality of axial main reinforcing bars and a band reinforcing the axial main reinforcing bars, and the hanging Insert the rebar rod into the steel pipe using the dual-purpose position holding member,
Reinforcement rod assembly for assembling a reinforcing steel rod built-in steel pipe by hooking the hanging and holding position holding member on the upper edge portion of the steel pipe and positioning the lower end portion of the reinforcing bar rod to protrude from the steel pipe Steel pipe assembly process.
(2) A reinforcing bar rod having a predetermined number of guide reinforcing bars protruding inward in the same direction as the axial main reinforcing bars is inserted into the upper ends of the plurality of axial main reinforcing bars. Suspend the steel bar built-in steel pipe near the upper part of the lower filled steel pipe reinforced concrete column provided,
First, the tip of the guide reinforcing bar is inserted into the reinforcing bar in the upper reinforcing steel rod built-in steel pipe, the steel pipe in the lower filling type steel pipe reinforced concrete column, and the steel pipe in the upper reinforcing steel rod built-in steel pipe The axial main reinforcing bar in the vertical direction is formed such that the axial main reinforcing bar of the upper reinforcing steel bar and the axial main reinforcing bar of the lower filled steel pipe reinforced concrete column form a lap joint. Correct the position of
Thereafter, the upper steel pipe is hung down, and the steel pipes in the lower filling type steel pipe reinforced concrete column built in advance are joined to each other by joining the steel pipes in the vertical direction. Reinforced steel pipe built-in steel pipe erection process to build in the steel pipe.
(3) A concrete filling step in which concrete is filled up to a predetermined position inside the built-in reinforcing steel rod built-in steel pipe. The construction method of the filling type steel pipe reinforced concrete column formed from the steel pipe and the reinforced concrete with which the inside was filled including the following processes.
(1) A reinforcing bar rod having a plurality of axial main reinforcing bars and band bars surrounding each of the axial main reinforcing bars, and having a guide portion in which a lower end portion of the axial main reinforcing bar is bent inward. Attach a hanging and holding position holding member to the upper end of the predetermined axial main reinforcing bar, insert the reinforcing bar rod into the steel pipe using the hanging and holding position holding member,
Reinforcement rod assembly for assembling a reinforcing steel rod built-in steel pipe by hooking the hanging and holding position holding member on the upper edge portion of the steel pipe and positioning the lower end portion of the reinforcing bar rod to protrude from the steel pipe Steel pipe assembly process.
(2) Hang the rebar built-in steel pipe to the upper vicinity of the lower filled steel pipe reinforced concrete column,
First, the tip of the guide portion is inserted into a reinforcing bar in the lower filling type steel pipe reinforced concrete column, a steel pipe in the lower filling type steel pipe reinforced concrete column, and a steel pipe in the upper reinforcing bar steel built-in steel pipe; Of the upper and lower axial main reinforcing bars so that the axial main reinforcing bars of the upper reinforcing steel rods and the axial main reinforcing bars of the lower filled steel pipe reinforced concrete columns form a lap joint. Correct the position,
Thereafter, the upper steel pipe is hung down, and the steel pipes in the lower filling type steel pipe reinforced concrete column built in advance are joined to each other by joining the steel pipes in the vertical direction. Reinforced steel pipe built-in steel pipe erection process to embed a steel pipe.
(3) A concrete filling step of filling the concrete to a predetermined position inside the built-in reinforcing steel rod built-in steel pipe. The said guide part is formed by binding the lower end part of each said axial direction main reinforcement with a linear member, and bend | folding inside, The construction method of the filling type steel pipe reinforced concrete column of Claim 3 characterized by the above-mentioned. .

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