JP2016128642A - Reinforcing method of reinforcing bar - Google Patents

Reinforcing method of reinforcing bar Download PDF

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JP2016128642A
JP2016128642A JP2015003556A JP2015003556A JP2016128642A JP 2016128642 A JP2016128642 A JP 2016128642A JP 2015003556 A JP2015003556 A JP 2015003556A JP 2015003556 A JP2015003556 A JP 2015003556A JP 2016128642 A JP2016128642 A JP 2016128642A
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reinforced concrete
concrete structure
reinforcing bar
hole
existing
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真 濱田
Makoto Hamada
真 濱田
時和 小島
Tokikazu Kojima
時和 小島
崇 古田
Takashi Furuta
崇 古田
正芳 梅田
Masayoshi Umeda
正芳 梅田
金森　誠治
Seiji Kanamori
誠治 金森
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Kumagai Gumi Co Ltd
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Kumagai Gumi Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a fixation method of a reinforcement capable of providing a reinforced concrete structure for improving resistance force to tensile force when adding the tensile force, by fixing the reinforcement of becoming a main reinforcement to a skeleton of the reinforced concrete structure by post-construction.SOLUTION: When extending a reinforced concrete structure in an existing reinforced concrete structure 1, a hole 2 is formed in the existing reinforced concrete structure 1, an end part 4 of a reinforcement 3 of becoming a main reinforcement of an extending reinforced concrete structure 10 is inserted into the hole 2, a grout material 5 is filled in the hole, and the reinforcement 3 of becoming the main reinforcement of the reinforced concrete structure 10 extended in the existing reinforced concrete structure 1, is fixed thereby.SELECTED DRAWING: Figure 1

Description

本発明は、鉄筋コンクリート構造体に主筋となる鉄筋を所謂あと施工で定着させる方法に関する。   The present invention relates to a method for fixing a reinforcing bar as a main reinforcement to a reinforced concrete structure by so-called post-construction.

例えば、既設の鉄筋コンクリート構造体に鉄筋コンクリート構造体を増設する場合において、既設の鉄筋コンクリート構造体としての既設柱梁架構の前面にせん断伝達部材として機能させるアンカー（アンカー筋）を植設し、既設柱梁架構の前方に増設する鉄筋コンクリート構造体の鉄筋を配筋するとともに型枠を設置して、既設の鉄筋コンクリート構造体と型枠との間の空間にコンクリートを打設することによって、既設の鉄筋コンクリート構造体に鉄筋コンクリート構造体を増設する方法が知られている（例えば特許文献１等参照）。即ち、当該方法により増設された鉄筋コンクリート構造体にせん断力が作用した場合、せん断力がせん断伝達部材を介して既設の鉄筋コンクリート構造体に伝達されるように構成されている。   For example, when adding a reinforced concrete structure to an existing reinforced concrete structure, an anchor (anchor bar) that functions as a shear transmission member is installed in front of the existing column beam structure as an existing reinforced concrete structure, and the existing column beam The existing reinforced concrete structure is constructed by placing reinforcing bars in the front of the frame and placing the formwork and placing concrete in the space between the existing reinforced concrete structure and the formwork. There is known a method of adding a reinforced concrete structure (see, for example, Patent Document 1). That is, when a shearing force acts on the reinforced concrete structure added by the method, the shearing force is transmitted to the existing reinforced concrete structure via the shear transmission member.

特開２０１１−８４８８６号公報JP 2011-84886 A

特許文献１は、既設柱梁架構の前面にせん断伝達部材として機能させるアンカーを植設し、増設された鉄筋コンクリート構造体にせん断力が作用した場合、せん断力をアンカーを介して既設の鉄筋コンクリート構造体に伝達することで、増設された鉄筋コンクリート構造体にせん断力が加わった場合に当該せん断力に対する抵抗力を向上させた構造である。しかしながら、特許文献１の構造では、増設された鉄筋コンクリート構造体に引張力が加わった場合に当該引張力に対する抵抗力が小さい。
本発明は、主筋となる鉄筋をあと施工で鉄筋コンクリート構造体の躯体に定着させることによって、引張力が加わった場合の当該引張力に対する抵抗力を向上させた鉄筋コンクリート構造体を得ることができる鉄筋の定着方法を提供するものである。 In Patent Document 1, when an anchor that functions as a shear transmission member is planted in front of an existing column beam frame and a shearing force acts on the added reinforced concrete structure, the existing reinforced concrete structure is subjected to the shearing force via the anchor. This is a structure that improves resistance to shearing force when shearing force is applied to the added reinforced concrete structure. However, in the structure of Patent Document 1, when a tensile force is applied to the added reinforced concrete structure, the resistance to the tensile force is small.
The present invention provides a reinforced concrete structure capable of obtaining a reinforced concrete structure with improved resistance to a tensile force when a tensile force is applied by fixing a reinforcing bar as a main reinforcement to a frame of the reinforced concrete structure by post-construction. A fixing method is provided.

本発明に係る鉄筋の定着方法は、既設の鉄筋コンクリート構造体に当該既設の鉄筋コンクリート構造体の主筋となる鉄筋を追加するために、既設の鉄筋コンクリート構造体に穴を形成し、当該穴内に主筋となる鉄筋を挿入した後に当該穴内にグラウト材を充填することによって、既設の鉄筋コンクリート構造体に当該既設の鉄筋コンクリート構造体の主筋となる鉄筋を定着させたので、既設の鉄筋コンクリート構造体の主筋となる鉄筋をあと施工で当該既設の鉄筋コンクリート構造体の躯体に定着させることによって、引張力が加わった場合の当該引張力に対する当該既設の鉄筋コンクリート構造体の抵抗力を向上させることができる。
本発明に係る鉄筋の定着方法は、既設の鉄筋コンクリート構造体に鉄筋コンクリート構造体を増設する場合に、既設の鉄筋コンクリート構造体に穴を形成し、増設する鉄筋コンクリート構造体の主筋となる鉄筋の端部を前記穴内に挿入して当該穴内にグラウト材を充填することによって、既設の鉄筋コンクリート構造体に増設する鉄筋コンクリート構造体の主筋となる鉄筋を定着させたので、増設する鉄筋コンクリート構造体の主筋となる鉄筋の端部をあと施工で既設の鉄筋コンクリート構造体の躯体に定着させることによって、引張力が加わった場合の当該引張力に対する抵抗力を向上させた鉄筋コンクリート構造体を増設できる。
また、前記穴内に挿入される鉄筋の端部は、鉄筋の軸部と、当該軸部よりも大径で当該軸部に連結された定着部とを備えたので、定着部とグラウト材との支圧抵抗を大きくでき、鉄筋コンクリート構造体の主筋に引張力が加わった場合に当該引張力に対する抵抗力を大きくできる。
また、前記穴の内壁面に凹凸を形成して、当該内壁面と前記グラウト材との付着抵抗を大きくしたので、当該付着抵抗を大きくでき、鉄筋コンクリート構造体の主筋に引張力が加わった場合に当該引張力に対する抵抗力を大きくできる。 In the reinforcing bar fixing method according to the present invention, a hole is formed in an existing reinforced concrete structure in order to add a reinforcing bar that is the main reinforcement of the existing reinforced concrete structure to the existing reinforced concrete structure, and the main reinforcement is formed in the hole. After inserting the reinforcing bars, filling the grout material into the holes fixed the reinforcing bars that are the main reinforcing bars of the existing reinforced concrete structures to the existing reinforcing concrete structures, so the reinforcing bars that are the main reinforcing bars of the existing reinforced concrete structures are fixed. By fixing to the frame of the existing reinforced concrete structure by post-construction, the resistance force of the existing reinforced concrete structure against the tensile force when a tensile force is applied can be improved.
In the method of fixing a reinforcing bar according to the present invention, when adding a reinforced concrete structure to an existing reinforced concrete structure, a hole is formed in the existing reinforced concrete structure, and the end of the reinforcing bar as the main reinforcing bar of the reinforced concrete structure to be added is formed. By inserting into the hole and filling the hole with the grout material, the reinforcing bar that is the main reinforcement of the reinforced concrete structure to be added to the existing reinforced concrete structure is fixed, so the reinforcing bars that are the main reinforcement of the reinforced concrete structure to be added are fixed. By fixing the end to the frame of an existing reinforced concrete structure by post-construction, it is possible to add a reinforced concrete structure with improved resistance to the tensile force when a tensile force is applied.
In addition, since the end of the reinforcing bar inserted into the hole includes a shaft part of the reinforcing bar and a fixing part that is larger in diameter than the shaft part and connected to the shaft part, the fixing part and the grout material The bearing resistance can be increased, and when a tensile force is applied to the main reinforcement of the reinforced concrete structure, the resistance force against the tensile force can be increased.
In addition, by forming irregularities on the inner wall surface of the hole and increasing the adhesion resistance between the inner wall surface and the grout material, the adhesion resistance can be increased, and when a tensile force is applied to the main reinforcement of the reinforced concrete structure Resistance to the tensile force can be increased.

既設の鉄筋コンクリート構造体に耐震補強用の鉄筋コンクリート構造体を増設する方法を示す説明図（実施形態１）。Explanatory drawing which shows the method of adding the reinforced concrete structure for seismic reinforcement to the existing reinforced concrete structure (embodiment 1). （ａ）は既設の鉄筋コンクリート構造体としての既設の鉄筋コンクリート柱に耐震補強用の鉄筋コンクリート梁が増設された状態を示す横断面図、（ｂ）は既設の鉄筋コンクリート構造体としての既設の鉄筋コンクリート柱に耐震補強用の鉄筋コンクリート梁が増設された状態を示す縦断面図（実施形態１）。(A) is a cross-sectional view showing a state in which reinforced concrete beams for seismic reinforcement are added to an existing reinforced concrete column as an existing reinforced concrete structure, and (b) is seismic resistant to an existing reinforced concrete column as an existing reinforced concrete structure. The longitudinal cross-sectional view which shows the state in which the reinforced concrete beam for reinforcement was added (Embodiment 1). 既設の鉄筋コンクリート構造体に形成する穴の内壁面の他例を示す断面図（実施形態１）。Sectional drawing which shows the other example of the inner wall face of the hole formed in the existing reinforced concrete structure (Embodiment 1). 既設の鉄筋コンクリート構造体に定着される鉄筋の端部形状を示す断面図（実施形態２）。Sectional drawing which shows the edge part shape of the reinforcing bar fixed to the existing reinforced concrete structure (Embodiment 2).

実施形態１
既設の鉄筋コンクリート構造体に例えば耐震補強用の鉄筋コンクリート構造体を増設する場合に、増設する鉄筋コンクリート構造体の主筋となる鉄筋の端部を既設の鉄筋コンクリート構造体に定着させる方法は、図１（ａ）に示す既設の鉄筋コンクリート構造体１の躯体に増設する鉄筋コンクリート構造体の主筋となる鉄筋の端部を挿入するための図１（ｂ）に示すような穴２を形成し、当該穴２内に増設する鉄筋コンクリート構造体１０（図１（ｅ）；図２参照）主筋となる図１（ｃ）に示すような鉄筋３の端部４を挿入した後、図１（ｄ）に示すように当該穴２内にグラウト材５を充填して、当該グラウト材５を固化させることで当該鉄筋３の端部４を既設の鉄筋コンクリート構造体１の躯体に定着させる。即ち、増設する鉄筋コンクリート構造体１０の主筋となる鉄筋３の端部４を既設の鉄筋コンクリート構造体１の躯体に所謂あと施工によって定着させる。
そして、既設の鉄筋コンクリート構造体１の躯体に定着された増設する鉄筋コンクリート構造体１０の主筋となる鉄筋３及び配筋された図外のせん断補強筋となる鉄筋を囲むように図外の型枠を設置し、既設の鉄筋コンクリート構造体１と図外の型枠との間の空間にコンクリートを打設することによって、図１（ｅ）に示すように既設の鉄筋コンクリート構造体１に耐震補強用の鉄筋コンクリート構造体１０を増設する。 Embodiment 1
For example, when an reinforced concrete structure for seismic reinforcement is added to an existing reinforced concrete structure, the method of fixing the end of the reinforcing bar as the main reinforcement of the added reinforced concrete structure to the existing reinforced concrete structure is shown in FIG. A hole 2 as shown in FIG. 1 (b) for inserting the end of the reinforcing bar that is the main reinforcement of the reinforced concrete structure to be added to the frame of the existing reinforced concrete structure 1 shown in FIG. Reinforced concrete structure 10 (see FIG. 1 (e); see FIG. 2) After inserting the end 4 of the reinforcing bar 3 as shown in FIG. 1 (c), which is the main reinforcement, the hole as shown in FIG. 1 (d) The grout material 5 is filled in 2 and the grout material 5 is solidified to fix the end portion 4 of the rebar 3 to the frame of the existing reinforced concrete structure 1. That is, the end portion 4 of the reinforcing bar 3 which is the main reinforcing bar of the reinforced concrete structure 10 to be added is fixed to the frame of the existing reinforced concrete structure 1 by so-called post-construction.
Then, the formwork outside the figure is arranged so as to surround the reinforcing bar 3 as the main reinforcement of the reinforced concrete structure 10 to be added, which is fixed to the frame of the existing reinforced concrete structure 1, and the reinforcing bar as the shear reinforcement reinforcement outside the figure. By installing and placing concrete in the space between the existing reinforced concrete structure 1 and the formwork outside the figure, as shown in FIG. 1 (e), the existing reinforced concrete structure 1 is reinforced concrete for seismic reinforcement. The structure 10 is added.

例えば図２に示すように、既設の鉄筋コンクリート構造体１としての鉄筋コンクリート柱１Ａに耐震補強用の鉄筋コンクリート構造体１０としての鉄筋コンクリート梁１０Ａを増設する場合、例えば、増設する鉄筋コンクリート梁１０Ａの梁主筋１１となる鉄筋の端部４を既設の鉄筋コンクリート柱１Ａに形成した穴２内に挿入した後、当該穴２内にグラウト材５を充填して固化させることで、増設する鉄筋コンクリート梁１０Ａの梁主筋１１となる鉄筋の端部４を既設の鉄筋コンクリート柱１Ａに定着させる。そして、増設する鉄筋コンクリート梁１０Ａの梁主筋１１；１１…となる鉄筋３を取り囲むように梁せん断補強筋１２；１２…となる鉄筋を配筋した後に、これら増設する鉄筋コンクリート梁１０Ａの梁主筋１１；１１…となる鉄筋３及び梁せん断補強筋１２；１２…となる鉄筋を囲むように図外の型枠を設置し、設置した型枠の内側の空間にコンクリートを打設することによって、既設の鉄筋コンクリート柱１Ａに耐震補強用の鉄筋コンクリート梁１０Ａを増設する。
尚、穴２は、図２に示すように、既設の鉄筋コンクリート柱１Ａの柱主筋６及び柱せん断補強筋７を避けて形成するとともに、柱主筋６の内側に形成することが好ましい。 For example, as shown in FIG. 2, when a reinforced concrete beam 10A as a reinforced concrete structure 10 for seismic reinforcement is added to an existing reinforced concrete column 1A as a reinforced concrete structure 1, for example, After inserting the end portion 4 of the reinforcing bar into the hole 2 formed in the existing reinforced concrete column 1A, the hole 2 is filled with the grout material 5 and solidified, so that the main beam 11 of the reinforced concrete beam 10A to be added The end 4 of the reinforcing bar is fixed to the existing reinforced concrete column 1A. Then, after arranging the reinforcing bars to be the beam shear reinforcements 12; 12 ... so as to surround the reinforcing bars 3; 11 ... of the reinforced concrete beams 10A to be added, the beam reinforcing bars 11 of the reinforced concrete beams 10A to be added; 11... Reinforcing bars 3 and beam shear reinforcement bars 12; 12... Are placed so as to surround the reinforcing bars, and concrete is placed in the space inside the installed formwork. A reinforced concrete beam 10A for seismic reinforcement is added to the reinforced concrete column 1A.
In addition, as shown in FIG. 2, while forming the hole 2 avoiding the column main reinforcement 6 and the column shear reinforcement 7 of the existing reinforced concrete column 1A, it is preferable to form the hole 2 inside the column main reinforcement 6. FIG.

図１；図２に示すように、穴２内に挿入される鉄筋３の端部４は、鉄筋３の軸部３Ａと当該軸部３Ａの端部に連結された当該軸部３Ａよりも大径の定着部４０とを備えた構成とすることが好ましい。
例えば、鉄筋３の軸部３Ａとしては、端部の外周面に図外のねじ部が形成された所謂ねじ鉄筋を使用し、定着部４０は、ねじ鉄筋のねじ部に締結される図外のねじ穴を備えたナット部４１と、ナット部４１の筒の一端部に設けられた定着板４２とを備えた構成のものを用いる。
定着板４２は、ナット部４１の外径よりも大径の例えば円板を用いる。例えば、ナット部４１の筒の中心線と定着板４２の中心線とが一致した同軸状になるようにナット部４１の筒の一端に定着板４２が一体に形成された構成の定着部４０を用いる。
このように、鉄筋３の端部４に定着部４０を備えた構成とすることで、定着板４２とグラウト材５との支圧抵抗を大きくできる。
尚、グラウト材５としては、セメントミルクやモルタル、合成樹脂等を用いれば良いが、特に、無収縮モルタルを用いることが好ましい。 As shown in FIG. 1; FIG. 2, the end 4 of the reinforcing bar 3 inserted into the hole 2 is larger than the shaft 3A of the reinforcing bar 3 and the shaft 3A connected to the end of the shaft 3A. A configuration including a fixing unit 40 having a diameter is preferable.
For example, as the shaft portion 3A of the rebar 3, a so-called screw rebar in which an unillustrated screw portion is formed on the outer peripheral surface of the end portion is used, and the fixing portion 40 is not shown in the drawing that is fastened to the screw portion of the screw rebar The thing of the structure provided with the nut part 41 provided with the screw hole and the fixing plate 42 provided in the one end part of the cylinder of the nut part 41 is used.
For the fixing plate 42, for example, a disc having a diameter larger than the outer diameter of the nut portion 41 is used. For example, the fixing unit 40 having a configuration in which the fixing plate 42 is integrally formed at one end of the cylinder of the nut unit 41 so that the center line of the cylinder of the nut unit 41 and the center line of the fixing plate 42 coincide with each other. Use.
As described above, by providing the fixing portion 40 at the end 4 of the reinforcing bar 3, the bearing resistance between the fixing plate 42 and the grout material 5 can be increased.
As the grout material 5, cement milk, mortar, synthetic resin or the like may be used, but it is particularly preferable to use non-shrink mortar.

定着部４０とグラウト材５との支圧抵抗、鉄筋３の軸部３Ａとグラウト材５との付着抵抗、穴内壁面２ａとグラウト材５との界面の付着抵抗を大きくすることにより、増設する鉄筋コンクリート梁１０の主筋となる鉄筋３に加わる引張力に対する抵抗力を大きくできる。
即ち、グラウト材５との関係において、定着板４２の径を大きくすることにより定着板４２とグラウト材５との支圧抵抗を大きくでき、鉄筋３の軸部３Ａの径を大きくすること及び鉄筋３の軸部３Ａの定着長さを長くすることにより鉄筋３の軸部３Ａとグラウト材５との付着抵抗を大きくでき、穴２の径を大きくすることにより穴内壁面２ａとグラウト材５との界面の付着抵抗を大きくできる。 The reinforced concrete to be added is increased by increasing the bearing resistance between the fixing portion 40 and the grout material 5, the adhesion resistance between the shaft portion 3A of the reinforcing bar 3 and the grout material 5, and the adhesion resistance at the interface between the hole inner wall surface 2a and the grout material 5. The resistance force to the tensile force applied to the reinforcing bar 3 as the main reinforcing bar of the beam 10 can be increased.
That is, in relation to the grout material 5, the bearing resistance between the fixing plate 42 and the grout material 5 can be increased by increasing the diameter of the fixing plate 42, and the diameter of the shaft portion 3 </ b> A of the reinforcing bar 3 can be increased. By increasing the fixing length of the shaft portion 3A, the adhesion resistance between the shaft portion 3A of the reinforcing bar 3 and the grout material 5 can be increased. By increasing the diameter of the hole 2, the inner wall surface 2a of the hole and the grout material 5 can be increased. The adhesion resistance at the interface can be increased.

実施形態１の鉄筋の定着方法によれば、既設の鉄筋コンクリート構造体１に鉄筋コンクリート構造体１０を増設する場合において、増設する鉄筋コンクリート構造体１０の主筋となる鉄筋３の端部４をあと施工で既設の鉄筋コンクリート構造体１の躯体に定着させることによって、引張力が加わった場合の当該引張力に対する抵抗力を向上させた鉄筋コンクリート構造体１０を増設でき、既設の鉄筋コンクリート構造体１の耐震補強を簡単容易に実施できるようになる。   According to the reinforcing bar fixing method of the first embodiment, when the reinforced concrete structure 10 is added to the existing reinforced concrete structure 1, the end portion 4 of the reinforcing bar 3 as the main reinforcement of the reinforced concrete structure 10 to be added is already installed. By fixing the reinforced concrete structure 1 of the reinforced concrete structure 1 to the reinforced concrete structure 1, it is possible to add the reinforced concrete structure 10 with improved resistance to the tensile force when a tensile force is applied, and it is easy to seismically strengthen the existing reinforced concrete structure 1 Can be implemented.

尚、穴２は既設コンクリート構造体１の表面に開口する有底穴により形成される。
当該穴２は、図１；図２で示すように、既設の鉄筋コンクリート構造体１に例えばコアボーリングで形成された比較的滑らかな穴内壁面２ａを備えた穴であってもよいし、図３に示すように、既設の鉄筋コンクリート構造体１に例えばウォータジェットによって凹凸を有した粗面に形成された穴内壁面２ｂを備えた穴であってもよい。凹凸を有した粗面に形成された穴内壁面２ｂを有した穴２を使用すれば、穴内壁面２ｂとグラウト材５との界面の付着抵抗を大きくでき、鉄筋３に加わる引張力に対する抵抗力をより大きくできるようになるので、増設された鉄筋コンクリート構造体１０に引張力が加わった場合の当該引張力に対する抵抗力をより向上させることができるようになる。 The hole 2 is formed by a bottomed hole that opens on the surface of the existing concrete structure 1.
As shown in FIG. 1; FIG. 2, the hole 2 may be a hole provided with a relatively smooth hole inner wall surface 2a formed by, for example, core boring on the existing reinforced concrete structure 1, or FIG. As shown, a hole provided with a hole inner wall surface 2b formed on a rough surface having irregularities by, for example, a water jet in the existing reinforced concrete structure 1 may be used. If the hole 2 having the hole inner wall surface 2b formed on the rough surface having irregularities is used, the adhesion resistance at the interface between the hole inner wall surface 2b and the grout material 5 can be increased, and the resistance force against the tensile force applied to the reinforcing bar 3 can be increased. Since it becomes possible to make it larger, it becomes possible to further improve the resistance to the tensile force when a tensile force is applied to the added reinforced concrete structure 10.

定着部４０の定着板４２は、ねじ鉄筋のねじ部が貫通するねじ孔を備えた構成のものであってもよい。   The fixing plate 42 of the fixing unit 40 may have a configuration including a screw hole through which a screw portion of a screw rebar penetrates.

実施形態２
図４に示すように、増設する鉄筋コンクリート構造体１０の主筋となる鉄筋３として端部４に定着部４０を備えない鉄筋３を用い、当該定着部４０を備えない鉄筋３の端部４を既設の鉄筋コンクリート構造体１に、上述したような、あと施工で定着させるようにしてもよい。
この場合、既設の鉄筋コンクリート構造体１に形成する穴２は、例えばコアボーリングで形成された比較的滑らかな穴内壁面２ａを備えた穴（図４（ａ）参照）であってもよいし、例えばウォータジェットによって凹凸を有した粗面に形成された穴内壁面２ｂを備えた穴（図４（ｂ）参照）であってもよい。 Embodiment 2
As shown in FIG. 4, the reinforcing bar 3 that does not include the fixing unit 40 is used as the reinforcing bar 3 that is the main reinforcing bar of the reinforced concrete structure 10 to be added, and the end 4 of the reinforcing bar 3 that does not include the fixing unit 40 is provided. The reinforced concrete structure 1 may be fixed by post-construction as described above.
In this case, the hole 2 formed in the existing reinforced concrete structure 1 may be a hole (see FIG. 4A) having a relatively smooth inner wall surface 2a formed by core boring, for example, The hole (refer FIG.4 (b)) provided with the inner wall surface 2b of the hole formed in the rough surface with the unevenness | corrugation by water jet may be sufficient.

尚、図３に示すように、増設する鉄筋コンクリート構造体１０の主筋となる鉄筋３として端部４に定着部４０を備えたものを用い、凹凸を有した粗面の穴内壁面２ｂを有した穴２内に定着部４０を備えた鉄筋３の端部４を挿入して当該穴２内にグラウト材５を充填して固化させることで、増設する鉄筋コンクリート構造体１０の主筋となる鉄筋３の端部４を既設の鉄筋コンクリート構造体１に定着させる構造とした場合、鉄筋３に加わる引張力に対する抵抗力をより大きくできるようになり、引張力が加わった場合の当該引張力に対する抵抗力を向上させた鉄筋コンクリート構造体１０を増設できるようになるので、主筋となる鉄筋３に加わる引張力に対して大きな抵抗力が必要となる増設鉄筋コンクリート構造体を構築する場合には、当該定着構造を採用することが好ましい。   In addition, as shown in FIG. 3, the thing which provided the fixing | fixed part 40 in the edge part 4 is used as the reinforcing bar 3 which becomes the main reinforcement of the reinforced concrete structure 10 to add, and the hole which has the rough inner surface 2b of a hole with an unevenness | corrugation By inserting the end portion 4 of the reinforcing bar 3 having the fixing portion 40 into the hole 2 and filling the hole 2 with the grout material 5 and solidifying it, the end of the reinforcing bar 3 serving as the main reinforcing bar of the reinforced concrete structure 10 to be added. When the part 4 is fixed to the existing reinforced concrete structure 1, the resistance force to the tensile force applied to the reinforcing bar 3 can be increased, and the resistance force to the tensile force when the tensile force is applied is improved. Therefore, when constructing an additional reinforced concrete structure that requires a large resistance to the tensile force applied to the main reinforcing bar 3, It is preferable to employ a Chakukozo.

実施形態３
実施形態１；２では、既設の鉄筋コンクリート構造体に増設する鉄筋コンクリート構造体の主筋となる鉄筋を定着させる場合について説明したが、既設の鉄筋コンクリート構造体に当該既設の鉄筋コンクリート構造体の主筋となる鉄筋を追加するために、既設の鉄筋コンクリート構造体に穴を形成し、当該穴内に主筋となる鉄筋を挿入した後に当該穴内にグラウト材を充填することによって、既設の鉄筋コンクリート構造体に当該既設の鉄筋コンクリート構造体の主筋となる鉄筋をあと施工で定着させてもよい。この場合、既設の鉄筋コンクリート構造体に当該既設の鉄筋コンクリート構造体の主筋となる鉄筋があと施工で追加されて、引張力が加わった場合の当該引張力に対する当該既設の鉄筋コンクリート構造体の抵抗力を向上させることができるようになり、既設の鉄筋コンクリート構造体の耐震補強を簡単容易に実施できるようになる。 Embodiment 3
In the first and second embodiments, the case where the reinforcing bars that are the main reinforcing bars of the reinforced concrete structure to be added to the existing reinforced concrete structures has been described. However, the reinforcing bars that are the main reinforcing bars of the existing reinforced concrete structures are attached to the existing reinforced concrete structures. In order to add, a hole is formed in the existing reinforced concrete structure, and after inserting the reinforcing bar which becomes the main reinforcement into the hole, the grout material is filled in the hole, so that the existing reinforced concrete structure is added to the existing reinforced concrete structure. Reinforcing bars that are the main bars of the steel may be fixed later by construction. In this case, a reinforcing bar that will be the main reinforcement of the existing reinforced concrete structure is added to the existing reinforced concrete structure by post-construction to improve the resistance of the existing reinforced concrete structure against the tensile force when a tensile force is applied. The seismic reinforcement of the existing reinforced concrete structure can be performed easily and easily.

１ 既設の鉄筋コンクリート構造体、２ 穴、２ａ;２ｂ 穴の内壁面、３ 鉄筋、
３Ａ 鉄筋の軸部、４ 鉄筋の端部、５ グラウト材、
１０ 増設する鉄筋コンクリート構造体、４０ 定着部。 1 Existing reinforced concrete structure, 2 holes, 2a; 2b Hole inner wall, 3 rebars,
3A Rebar shaft, 4 Rebar end, 5 Grout material,
10 Reinforced concrete structure to be expanded, 40 anchorage.

Claims (4)

既設の鉄筋コンクリート構造体に当該既設の鉄筋コンクリート構造体の主筋となる鉄筋を追加するために、既設の鉄筋コンクリート構造体に穴を形成し、当該穴内に主筋となる鉄筋を挿入した後に当該穴内にグラウト材を充填することによって、既設の鉄筋コンクリート構造体に当該既設の鉄筋コンクリート構造体の主筋となる鉄筋を定着させたことを特徴とする鉄筋の定着方法。   In order to add a reinforcing bar that is the main reinforcement of the existing reinforced concrete structure to the existing reinforced concrete structure, a hole is formed in the existing reinforced concrete structure, and after inserting the reinforcing bar that becomes the main reinforcement in the hole, the grout material The reinforcing bar fixing method is characterized in that the reinforcing bar which becomes the main reinforcing bar of the existing reinforced concrete structure is fixed to the existing reinforced concrete structure by filling the reinforced concrete structure. 既設の鉄筋コンクリート構造体に鉄筋コンクリート構造体を増設する場合に、既設の鉄筋コンクリート構造体に穴を形成し、増設する鉄筋コンクリート構造体の主筋となる鉄筋の端部を前記穴内に挿入して当該穴内にグラウト材を充填することによって、既設の鉄筋コンクリート構造体に増設する鉄筋コンクリート構造体の主筋となる鉄筋を定着させたことを特徴とする鉄筋の定着方法。   When adding a reinforced concrete structure to an existing reinforced concrete structure, a hole is formed in the existing reinforced concrete structure, and the end of the reinforcing bar that is the main reinforcement of the reinforced concrete structure to be added is inserted into the hole and grouted in the hole. A method for fixing a reinforcing bar comprising fixing a reinforcing bar as a main reinforcing bar of a reinforced concrete structure to be added to an existing reinforced concrete structure by filling a material. 前記穴内に挿入される鉄筋の端部は、鉄筋の軸部と、当該軸部よりも大径で当該軸部に連結された定着部とを備えたことを特徴とする請求項１又は請求項２に記載の鉄筋の定着方法。   The end portion of the reinforcing bar inserted into the hole includes a shaft portion of the reinforcing bar and a fixing portion having a diameter larger than that of the shaft portion and connected to the shaft portion. 3. A method for fixing a reinforcing bar according to 2. 前記穴の内壁面に凹凸を形成して、当該内壁面と前記グラウト材との付着抵抗を大きくしたことを特徴とする請求項１乃至請求項３のいずれか一項に記載の鉄筋の定着方法。   The method for fixing a reinforcing bar according to any one of claims 1 to 3, wherein unevenness is formed on an inner wall surface of the hole to increase adhesion resistance between the inner wall surface and the grout material. .
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Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5456223A (en) * 1977-10-12 1979-05-07 Ebara Mfg Method of rigid connecting increase construction of existing reinforced concrete structure
JP2004116128A (en) * 2002-09-26 2004-04-15 Sanko Techno Co Ltd Concrete structure jointing material
KR20060102785A (en) * 2005-03-25 2006-09-28 유승룡 Development of Precast Concrete Column and Beam Dry Connection by Reinforced Bolt Joint
JP2009091844A (en) * 2007-10-10 2009-04-30 Takenaka Komuten Co Ltd Column-beam joint method and column-beam joint structure
JP2009155922A (en) * 2007-12-27 2009-07-16 Nishimatsu Constr Co Ltd Anchor muscle fixing structure and method
JP2010090573A (en) * 2008-10-07 2010-04-22 Maeda Corp Structure and method for anchoring reinforcement to reinforced concrete structure
JP2010281044A (en) * 2009-06-02 2010-12-16 Shimizu Corp Mixed structural beam
JP2011256640A (en) * 2010-06-10 2011-12-22 Kumagai Gumi Co Ltd Shear reinforcement method for existing concrete structure
JP2012207414A (en) * 2011-03-29 2012-10-25 Takenaka Komuten Co Ltd Joint structure for reinforced concrete beam
JP2014015791A (en) * 2012-07-10 2014-01-30 Takenaka Komuten Co Ltd Structure for reinforcing perforated beam

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5456223A (en) * 1977-10-12 1979-05-07 Ebara Mfg Method of rigid connecting increase construction of existing reinforced concrete structure
JP2004116128A (en) * 2002-09-26 2004-04-15 Sanko Techno Co Ltd Concrete structure jointing material
KR20060102785A (en) * 2005-03-25 2006-09-28 유승룡 Development of Precast Concrete Column and Beam Dry Connection by Reinforced Bolt Joint
JP2009091844A (en) * 2007-10-10 2009-04-30 Takenaka Komuten Co Ltd Column-beam joint method and column-beam joint structure
JP2009155922A (en) * 2007-12-27 2009-07-16 Nishimatsu Constr Co Ltd Anchor muscle fixing structure and method
JP2010090573A (en) * 2008-10-07 2010-04-22 Maeda Corp Structure and method for anchoring reinforcement to reinforced concrete structure
JP2010281044A (en) * 2009-06-02 2010-12-16 Shimizu Corp Mixed structural beam
JP2011256640A (en) * 2010-06-10 2011-12-22 Kumagai Gumi Co Ltd Shear reinforcement method for existing concrete structure
JP2012207414A (en) * 2011-03-29 2012-10-25 Takenaka Komuten Co Ltd Joint structure for reinforced concrete beam
JP2014015791A (en) * 2012-07-10 2014-01-30 Takenaka Komuten Co Ltd Structure for reinforcing perforated beam

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