JP2005291957A - Stress-measuring method using reinforcement joint, and reinforcement joint - Google Patents

Stress-measuring method using reinforcement joint, and reinforcement joint Download PDF

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JP2005291957A
JP2005291957A JP2004108254A JP2004108254A JP2005291957A JP 2005291957 A JP2005291957 A JP 2005291957A JP 2004108254 A JP2004108254 A JP 2004108254A JP 2004108254 A JP2004108254 A JP 2004108254A JP 2005291957 A JP2005291957 A JP 2005291957A
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reinforcing bar
stress
fixing
joint
reinforcing
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Tomofumi Muroi
智文 室井
Koichiro Shimomo
孝一郎 紫桃
Koji Osada
光司 長田
Kazuaki Yokoyama
和昭 横山
Yoshimasa Matsui
義昌 松井
Yoichi Takayama
洋一 高山
Takuya Kato
卓也 加藤
Kenichi Hida
研一 肥田
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CHIYODA ENGINEERING CONSULTANT
CHIYODA ENGINEERING CONSULTANTS CO Ltd
JAPAN PRESTRESSED CONCRETE CON
JAPAN PRESTRESSED CONCRETE CONTRACTORS ASSOCIATION
KEISOKU RES CONSULTANT KK
Sumitomo SEI Steel Wire Corp
Keisoku Research Consultant Co Ltd
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CHIYODA ENGINEERING CONSULTANT
CHIYODA ENGINEERING CONSULTANTS CO Ltd
JAPAN PRESTRESSED CONCRETE CON
JAPAN PRESTRESSED CONCRETE CONTRACTORS ASSOCIATION
KEISOKU RES CONSULTANT KK
Sumitomo SEI Steel Wire Corp
Keisoku Research Consultant Co Ltd
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Priority to JP2004108254A priority Critical patent/JP2005291957A/en
Publication of JP2005291957A publication Critical patent/JP2005291957A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a stress-measuring method using a reinforcement joint capable of complementing a cut reinforcement, without damaging the existing structure as much as possible, when measuring an internal stress of the existing structure by a stress release method, and which is capable of measuring precisely the stress generated in the reinforcement in the present situation thereafter. <P>SOLUTION: This stress-measuring method using the reinforcement joint 10 uses the reinforcement joint 10 for complementing the reinforcement 2, when cutting the reinforcement 2, in a method for measuring the stress of the reinforcement 2 generated in an inside of the existing structure. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、鉄筋継手を用いて既設構造物の内部に有する鉄筋の応力を計測する鉄筋継手を用いた応力計測方法、及び当該鉄筋を補完するための鉄筋継手に関する。   The present invention relates to a stress measurement method using a reinforcing bar joint that measures the stress of a reinforcing bar in an existing structure using the reinforcing bar joint, and a reinforcing bar joint for complementing the reinforcing bar.

鉄筋コンクリート（以下、「ＲＣ」）構造物やプレストレスコンクリート（以下、「ＰＣ」）構造物は、コンクリート部材に作用する応力がコンクリートのクリープや鉄筋、ＰＣ鋼材の腐食、破断によって減少し、劣化する。この応力の状態を知ることにより、適切な処置を実施することが可能となる。また、応力の減少に伴い、たわみの増加、異常なたわみ、ひび割れの発生、振動特性の変化等が生じる。このたわみ、ひび割れを計測する方法は存在する。   Reinforced concrete (hereinafter “RC”) structures and prestressed concrete (hereinafter “PC”) structures are deteriorated due to the stress acting on the concrete members being reduced by corrosion and fracture of concrete creep, rebar and PC steel. . Knowing the state of this stress makes it possible to implement an appropriate treatment. Further, with the decrease in stress, an increase in deflection, abnormal deflection, occurrence of cracks, changes in vibration characteristics, and the like occur. There is a method for measuring this deflection and crack.

また、ＲＣ構造物等の既設構造物の内部応力の状態を知る方法として、従来は、既設構造物のコンクリート中の鉄筋にどの程度の応力が発生しているかを計測するために、コンクリートを削り、鉄筋を露出して歪ゲージを取り付けた後に鉄筋を切断し、鉄筋の応力を解放することによって発生する戻り歪を計測していた（応力解放法）。   Also, as a method of knowing the state of internal stress of an existing structure such as an RC structure, conventionally, in order to measure how much stress is generated in the reinforcing bars in the concrete of the existing structure, the concrete is shaved. After the rebar was exposed and the strain gauge was attached, the rebar was cut and the return strain generated by releasing the stress of the rebar was measured (stress release method).

また、ＲＣ構造物にあっては、従来は、重大なひび割れ等が発生した場合に限りＲＣ構造物の内部応力の状態が計測されていた。これは、ＲＣ構造物のＲＣ構造物はコンクリート内で鉄筋の軸線方向に引っ張り応力がかかっているため、鉄筋を応力解放法で計測した場合に、破断した鉄筋を溶接したり、破断した鉄筋に近接させてそえ筋を行ったりしているが既設構造物に与えるダメージが大きいからである。   In the RC structure, conventionally, the state of internal stress of the RC structure is measured only when a serious crack or the like occurs. This is because the RC structure of the RC structure is tensile stressed in the axial direction of the reinforcing bar in the concrete. Therefore, when the reinforcing bar is measured by the stress release method, the broken reinforcing bar is welded or the broken reinforcing bar is This is because the struts are placed close to each other, but the damage to the existing structure is large.

しかし、ＲＣ構造物における応力解放法による内部応力の状態を計測する場合には、応力解放法により切断されたＲＣ鋼材を溶接により繋ぎ合わせたり、切断されたＲＣ鋼材にそえ筋を行ったりしているため、拘束された鉄筋に対して溶接を行うことによって降伏点まで至る応力が発生するため、現状鉄筋に発生している応力に誤差を生じ精度良く計測できないという問題がある。   However, when measuring the state of internal stress by the stress release method in RC structures, RC steel materials cut by the stress release method are joined together by welding, or the RC steel material cut is cut into a brace. Therefore, since the stress reaching the yield point is generated by welding the constrained reinforcing bar, there is a problem that an error occurs in the stress generated in the current reinforcing bar and the measurement cannot be performed with high accuracy.

また、鉄筋継手によるバイパスとなる鉄筋の長さは、片側でも鉄筋の直径の３０倍以上必要なため、結果としてコンクリートをはつる範囲が大きくなり、構造物を傷めることが問題となる。   Moreover, since the length of the reinforcing bar that is bypassed by the reinforcing bar joint is required to be 30 times or more the diameter of the reinforcing bar on one side, the range in which the concrete is hung up becomes large as a result, and the structure is damaged.

また、上記に示すＰＣ構造物における応力解放法による内部応力の状態を計測する場合には、鉄筋を切断しても構造物が安全なように、切断する鉄筋の応力を分担させるバイパスとなる補助鉄筋を前記鉄筋に溶接し補強しているが、上記ＲＣ構造物と同様に、拘束された鉄筋に対して溶接を行うことによって降伏点まで至る応力が発生するため、現状鉄筋に発生している応力に誤差を生じ精度良く計測できないという問題がある。   In addition, when measuring the state of internal stress by the stress release method in the PC structure shown above, it is a bypass that shares the stress of the reinforcing bar to be cut so that the structure is safe even if the reinforcing bar is cut. Reinforcing bars are welded to the reinforcing bars to reinforce them, but as with the RC structure described above, since the stress that reaches the yield point is generated by welding the constrained reinforcing bars, they are occurring in the current reinforcing bars. There is a problem that an error occurs in stress and measurement cannot be performed with high accuracy.

そこで本発明は、応力解放法による既設構造物の内部応力の計測の際に既設構造物をなるべく傷めずに切断される鉄筋を補完するとともに、その後の現状鉄筋に発生している応力を精度良く計測するための鉄筋継手を用いた応力計測方法、及び鉄筋継手を提供することを目的とする。   Therefore, the present invention complements a reinforcing bar that is cut without damaging the existing structure as much as possible when measuring the internal stress of the existing structure by the stress release method, and accurately corrects the stress generated in the current reinforcing bar thereafter. An object of the present invention is to provide a stress measurement method using a reinforcing bar joint for measurement, and a reinforcing bar joint.

以下、本発明について説明する。なお、本発明の理解を容易にするために添付図面の参照符号を括弧書きにて付記するが、それにより本発明が図示の形態に限定されるものではない。   The present invention will be described below. In order to facilitate understanding of the present invention, reference numerals in the accompanying drawings are appended in parentheses, but the present invention is not limited to the illustrated embodiment.

本願の鉄筋継手を用いた応力計測方法は、応力解放によって既設構造物の内部に有する鉄筋（２）の応力を計測する方法において、前記鉄筋を切断する際に当該鉄筋を補完するための鉄筋継手（１０、４０）を用いることを特徴とする。また、前記鉄筋継手（１０）は、前記切断する箇所における鉄筋の一部を固定するための固定部を有する第１の支持体（４）と、前記切断する箇所における鉄筋の他の一部を固定するための固定部を有する第２の支持体（４）と、前記鉄筋と平行に配置され、前記第１及び第２の支持体を連結するための少なくとも２本の連結体（５）と、を具備している。また、前記鉄筋継手（４０）は、前記切断する箇所における鉄筋の一方の端部を固定するための第１の固定部（４２）と、前記切断箇所における鉄筋の他方の端部を固定するための第２の固定部（４２）と、を有する支持体（４１）を備えている。   The stress measurement method using the reinforcing bar joint of the present application is a method for measuring the stress of the reinforcing bar (2) in the existing structure by releasing the stress, and the reinforcing bar joint for complementing the reinforcing bar when cutting the reinforcing bar. (10, 40) is used. Further, the reinforcing bar joint (10) includes a first support (4) having a fixing portion for fixing a part of the reinforcing bar in the part to be cut, and another part of the reinforcing bar in the part to be cut. A second support body (4) having a fixing portion for fixing, and at least two connection bodies (5) arranged in parallel with the reinforcing bars and for connecting the first and second support bodies; Are provided. The reinforcing bar joint (40) has a first fixing part (42) for fixing one end of the reinforcing bar at the location to be cut and the other end of the reinforcing bar at the cutting location. And a second support part (42).

また、本願の鉄筋継手は、鉄筋（２）の一部を固定するための固定部を有する第１の支持体（４）と、前記鉄筋の他の一部を固定するための固定部を有する第２の支持体（４）と、前記鉄筋と平行に配置され、前記第１及び第２の支持体を連結するための少なくとも２本の連結体（５）と、を具備することを特徴とする。また、前記鉄筋の軸に対して直交する方向の断面において、前記連結体は、少なくとも２本有し、当該連結体の軸と鉄筋の軸とを結ぶ線によって形成される前記鉄筋の軸回りの角度がすべて同一になるように配置されることを特徴とする。また、前記第１、及び第２の支持体は、前記鉄筋に沿って対向して設けられていることを特徴とする。また、前記支持体は、前記鉄筋を支持するための略半円状の筒状体（６ｂ）を有するとともに凹部（６ａ）を有する基台（６）と、前記基台の凹部に前記鉄筋を押圧して固定するための略半円状の筒状体（７ａ）を有する押圧体（７）と、を具備し、前記基台、及び押圧体に有する筒状体には前記鉄筋が滑るのを防止するためのグリップ手段を備えていることを特徴とする。   Moreover, the reinforcing bar joint of this application has the 1st support body (4) which has a fixing part for fixing a part of reinforcing bar (2), and a fixing part for fixing the other part of the reinforcing bar. A second support body (4), and at least two connection bodies (5) arranged in parallel to the reinforcing bars for connecting the first and second support bodies. To do. Further, in a cross section in a direction perpendicular to the axis of the reinforcing bar, the connecting body has at least two, and is formed around a line of the reinforcing bar formed by a line connecting the axis of the connecting body and the axis of the reinforcing bar. It is arranged that all the angles are the same. Further, the first and second supports are provided to face each other along the reinforcing bar. The support includes a base (6) having a substantially semicircular cylindrical body (6b) for supporting the reinforcing bars and a recess (6a), and the reinforcing bars in the recesses of the base. A pressing body (7) having a substantially semicircular cylindrical body (7a) for pressing and fixing, and the reinforcing bars slide on the base and the cylindrical body included in the pressing body. It is characterized by comprising grip means for preventing this.

本発明によれば、鉄筋を切断した際に、既設構造物をなるべく傷めずに切断した鉄筋を補完できる。また、切断した鉄筋にかかる応力を連結体に均一に分散することができる。そのため、この連結体を通して応力等の測定を行ったとしても、現状鉄筋に生じている応力を精度良く計測できる。また、鉄筋継手を、鉄筋に容易に装着できる。また、鉄筋継手を鉄筋に装着する際に、コンクリートを切り出す幅を狭くでき、作業者の負担を減少できる。   According to the present invention, when a reinforcing bar is cut, the cut reinforcing bar can be complemented without damaging an existing structure as much as possible. Further, the stress applied to the cut reinforcing bars can be uniformly dispersed in the connector. Therefore, even if the stress or the like is measured through this connected body, the stress generated in the current reinforcing bar can be measured with high accuracy. Further, the reinforcing bar joint can be easily attached to the reinforcing bar. Moreover, when attaching a reinforcing bar joint to a reinforcing bar, the width | variety which cuts out concrete can be narrowed and a worker's burden can be reduced.

以下、本発明である鉄筋継手に係る各実施の形態について詳細に説明する。   Hereinafter, each embodiment concerning the reinforcing bar joint which is the present invention is described in detail.

−第１の実施形態−
図１は第１の実施形態の鉄筋継手の外観図、図２は図１のＡ−Ａ断面図、図３は第１の実施形態の鉄筋継手の支持体の基台を示し、図３（ａ）は平面図、図３（ｂ）は右側面図、図４は第１の実施形態の鉄筋継手の支持体の押圧体を示し、図４（ａ）は平面図、図４（ｂ）は右側面図である。 -First embodiment-
1 is an external view of the reinforcing bar joint of the first embodiment, FIG. 2 is a cross-sectional view taken along the line AA of FIG. 1, and FIG. 3 shows a base of the reinforcing bar joint support of the first embodiment. a) is a plan view, FIG. 3 (b) is a right side view, FIG. 4 shows a pressing body of the support for the reinforcing bar joint of the first embodiment, FIG. 4 (a) is a plan view, and FIG. 4 (b). Is a right side view.

この鉄筋継手１０は、応力解放法によってＰＣ構造物、ＲＣ構造物等の既設構造物の内部応力を計測する際に生じる既設構造物の内部に有する鉄筋２の切断による当該鉄筋２の補完、及び当該鉄筋２にかかる応力を分散させ現状鉄筋２に生じる応力の計測をするためのものであり、当該鉄筋２に装着されるものである。   This reinforcing bar joint 10 is used to complement the reinforcing bar 2 by cutting the reinforcing bar 2 inside the existing structure, which is generated when measuring the internal stress of the existing structure such as a PC structure or an RC structure by the stress release method, and The stress applied to the reinforcing bar 2 is distributed to measure the stress generated in the current reinforcing bar 2 and is attached to the reinforcing bar 2.

図１に示すように、鉄筋継手１０は、鉄筋２の一部を固定するための支持体４と、鉄筋２の他の一部を固定するための支持体４と、前記支持体４同士を連結するための連結体５と、を備えている。この連結体５は、少なくとも２本必要である。また、支持体４は、鉄筋２に沿って対向して設けられる。   As shown in FIG. 1, the reinforcing bar joint 10 includes a support 4 for fixing a part of the reinforcing bar 2, a support 4 for fixing another part of the reinforcing bar 2, and the supports 4. And a connection body 5 for connection. At least two connecting members 5 are necessary. Further, the support 4 is provided so as to face along the reinforcing bar 2.

支持体４は、鉄筋２を固定するための鉄筋固定部８と、他の支持体４と連結体５を介して連結するための連結孔９と、を備える。また、連結孔９には、連結体５が接続される。これにより、支持体４、４同士は、連結体５、５により相互に連結される。また、支持体４は、基台６と、鉄筋２を押圧するための押圧体７と、を備える。   The support 4 includes a reinforcing bar fixing portion 8 for fixing the reinforcing bar 2, and a connection hole 9 for connecting to the other support 4 via the connection body 5. Further, the connecting body 5 is connected to the connecting hole 9. Thereby, the support bodies 4 and 4 are mutually connected by the connection bodies 5 and 5. FIG. The support body 4 includes a base 6 and a pressing body 7 for pressing the reinforcing bar 2.

基台６は、図３に示すように、一端面上に凹部６ａを有する。また、凹部６ａの凹みに略半円状の筒状体６ｂを有する。また、筒状体６ｂは基台６の軸方向に延びるように形成されている。この筒状体６ｂには鉄筋２が配置される。また、筒状体６ｂには、鉄筋２を滑りにくくするための複数の溝１２が形成されている。また、筒状体６ｂは焼入れされている。この溝１２は、鉄筋２が滑るのを防止するためのグリップ手段として機能する。更に、筒状体６ｂの両側部には、ねじ等の固定具を挿入するための貫通孔１１、１１、…、１１を有する。貫通孔１１は、筒状体６ｂの軸線方向に対して鉛直方向に形成される。また、貫通孔１１は、筒状体６ｂの軸線方向に複数設けられる。   The base 6 has the recessed part 6a on one end surface, as shown in FIG. Moreover, it has the substantially semicircular cylindrical body 6b in the dent of the recessed part 6a. The cylindrical body 6 b is formed so as to extend in the axial direction of the base 6. The reinforcing bar 2 is disposed on the cylindrical body 6b. Moreover, the some groove | channel 12 for making the rebar 2 difficult to slip is formed in the cylindrical body 6b. Moreover, the cylindrical body 6b is quenched. This groove 12 functions as a grip means for preventing the rebar 2 from slipping. Furthermore, it has through-holes 11, 11,..., 11 for inserting fixtures such as screws on both sides of the cylindrical body 6b. The through hole 11 is formed in the vertical direction with respect to the axial direction of the cylindrical body 6b. A plurality of through holes 11 are provided in the axial direction of the cylindrical body 6b.

押圧体７は、図４に示すように、一端面上に略半円状の筒状体７ａを有する。この筒状体７ａは軸方向に延びるように形成される。また、筒状体７ａは、鉄筋２を滑りにくくするための複数の溝１３、１３、…、１３を備えている。また、筒状体７ａは焼入れされている。この溝１３は、鉄筋２が滑るのを防止するためのグリップ手段として機能する。また、筒状体７ａは、基台６の筒状体６ｂと合わさる位置に形成される。即ち、押圧体７は、基台６の凹部６ａ上に設けられ、基台６、及び押圧体７の筒状体６ｂ、７ａに鉄筋２が配置される。また、筒状体７ａの両側部には筒状体７ａの軸線方向に対して鉛直方向に貫通する貫通孔１４を有する。貫通孔１４は、筒状体７ａの軸線方向に複数設けられる。この貫通孔１４にはボルト等の固定具と螺合するための溝が設けられる。これにより、押圧体７は、基台６の凹部６ａと嵌合し、基台６、及び押圧体７の貫通孔１１、１４を介してボルト等の固定具により固定される。   As shown in FIG. 4, the pressing body 7 has a substantially semicircular cylindrical body 7 a on one end surface. The cylindrical body 7a is formed to extend in the axial direction. Moreover, the cylindrical body 7a is provided with a plurality of grooves 13, 13,. Moreover, the cylindrical body 7a is quenched. This groove 13 functions as a grip means for preventing the rebar 2 from slipping. Further, the cylindrical body 7 a is formed at a position where it is combined with the cylindrical body 6 b of the base 6. That is, the pressing body 7 is provided on the recess 6 a of the base 6, and the reinforcing bars 2 are arranged on the base 6 and the cylindrical bodies 6 b and 7 a of the pressing body 7. Moreover, it has the through-hole 14 penetrated to the orthogonal | vertical direction with respect to the axial direction of the cylindrical body 7a in the both sides of the cylindrical body 7a. A plurality of through holes 14 are provided in the axial direction of the cylindrical body 7a. The through hole 14 is provided with a groove for screwing with a fixture such as a bolt. Accordingly, the pressing body 7 is fitted into the recess 6 a of the base 6 and is fixed by a fixing tool such as a bolt through the base 6 and the through holes 11 and 14 of the pressing body 7.

また、連結孔９は、基台６の両端部近傍に形成される。連結孔９は、筒状体６ｂの軸線方向に貫通している。この連結孔９には連結体５が挿入される。このように、連結孔９は鉄筋２が配置される筒状体６ｂ、７ａと平行に形成される。また、筒状体６ｂの軸に対して直交する方向の断面において、連結孔９の軸は筒状体６ｂの軸線方向と水平方向に直交する線上に配置される。   Further, the connecting hole 9 is formed in the vicinity of both end portions of the base 6. The connecting hole 9 penetrates in the axial direction of the cylindrical body 6b. The connecting body 5 is inserted into the connecting hole 9. Thus, the connection hole 9 is formed in parallel with the cylindrical bodies 6b and 7a where the reinforcing bars 2 are arranged. Moreover, in the cross section in the direction orthogonal to the axis of the cylindrical body 6b, the axis of the connecting hole 9 is arranged on a line orthogonal to the axial direction of the cylindrical body 6b.

また、連結体５の一部にはナット等の固定具と螺合するための溝が形成されている。連結体５は、図１に示すように、連結孔９に挿入し、連結孔９の入口及び出口において、ナット等の固定具によって固定する。これにより、連結体５を支持体４に固定できる。   Further, a groove for screwing with a fixture such as a nut is formed in a part of the connecting body 5. As shown in FIG. 1, the connecting body 5 is inserted into the connecting hole 9 and fixed at the inlet and outlet of the connecting hole 9 by a fixing tool such as a nut. Thereby, the connection body 5 can be fixed to the support body 4.

また、連結体５の断面積は、鉄筋２の断面積の１／２〜鉄筋の断面積の大きさを有する。また、連結体５は、鉄筋２と同じ部材を使用することが好ましい。   Moreover, the cross-sectional area of the connection body 5 has the magnitude | size of the cross-sectional area of 1/2 to the cross-sectional area of a reinforcing bar 2. Moreover, it is preferable that the connection body 5 uses the same member as the reinforcing bar 2.

また、図２に示すように、鉄筋２の軸に対して直交する方向の断面において、連結体５は、連結体５の軸と鉄筋２の軸とを結ぶ線ｌによって形成される鉄筋２の軸回りの角度θ１、θ２が同一になるように配置される。   Further, as shown in FIG. 2, in a cross section in a direction orthogonal to the axis of the reinforcing bar 2, the connecting body 5 is formed of a line 1 connecting the axis of the connecting body 5 and the axis of the reinforcing bar 2. The axes are arranged such that the angles θ1 and θ2 are the same.

この連結体５が３本以上存在する場合も同様である。即ち、連結体５は、連結体５の軸と鉄筋２の軸とを結ぶ線によって形成される鉄筋２の軸回りの角度θ１、θ２、（θ３、θ４、…）が同一になるように配置される。   The same applies when there are three or more of these connectors 5. That is, the connecting body 5 is arranged so that the angles θ1, θ2, (θ3, θ4,...) Around the axis of the reinforcing bar 2 formed by a line connecting the axis of the connecting body 5 and the axis of the reinforcing bar 2 are the same. Is done.

以上に説明したように、本願の鉄筋継手１０は、鉄筋２の一部を固定するための固定部を有する第１の支持体４と、鉄筋２の他の一部を固定するための固定部を有する第２の支持体４と、鉄筋２と平行に配置され、第１及び第２の支持体４、４を連結するための少なくとも２本の連結体５、５と、を具備している。また、鉄筋２の軸に対して直交する方向の断面において、連結体５は、少なくとも２本有し、連結体５の軸と鉄筋２の軸とを結ぶ線によって形成される鉄筋２の軸回りの角度がすべて同一になるように配置されている。また、鉄筋継手１０は、第１、及び第２の支持体４、４は、鉄筋２に沿って対向して設けられている。また、支持体４は、鉄筋２を支持するための略半円状の筒状体６ｂを有するとともに凹部６ａを有する基台６と、基台６の凹部６ａに鉄筋２を押圧して固定するための略半円状の筒状体７ａを有する押圧体７と、を具備し、基台６、及び押圧体７に有する筒状体６ｂ、７ａには鉄筋２が滑るのを防止するための溝１２、１３を備えている。   As described above, the reinforcing bar joint 10 of the present application includes the first support 4 having a fixing part for fixing a part of the reinforcing bar 2 and the fixing part for fixing another part of the reinforcing bar 2. And a second support body 4 having at least two connecting bodies 5 and 5 which are arranged in parallel to the reinforcing bar 2 and connect the first and second support bodies 4 and 4. . Further, in a cross section in a direction perpendicular to the axis of the reinforcing bar 2, there are at least two connecting bodies 5, and the axis of the reinforcing bar 2 is formed by a line connecting the axis of the connecting body 5 and the axis of the reinforcing bar 2. Are arranged so that their angles are all the same. In the reinforcing bar joint 10, the first and second support bodies 4 and 4 are provided so as to face each other along the reinforcing bar 2. The support body 4 has a substantially semicircular cylindrical body 6b for supporting the rebar 2 and has a base 6 having a recess 6a, and the rebar 2 is pressed and fixed to the recess 6a of the base 6. And a pressing body 7 having a substantially semicircular cylindrical body 7a for preventing the rebar 2 from sliding on the base body 6 and the cylindrical bodies 6b and 7a included in the pressing body 7. Grooves 12 and 13 are provided.

このようにすれば、当該鉄筋継手１０を用いて応力解放法による既設構造物の応力計測において、鉄筋２を切断した際に、既設構造物をなるべく傷めずに切断した鉄筋２を補完できる。また、切断した鉄筋２にかかる応力を連結体５に均一に分散することができる。そのため、この連結体５を通して応力等の測定を行ったとしても、現状鉄筋に生じている応力を精度良く計測できる。   If it does in this way, in the stress measurement of the existing structure by the stress release method using the said reinforcement joint 10, when the reinforcing bar 2 is cut | disconnected, the reinforcing bar 2 cut | disconnected without damaging an existing structure as much as possible can be complemented. Further, the stress applied to the cut reinforcing bars 2 can be uniformly dispersed in the connector 5. Therefore, even if the stress or the like is measured through the connecting body 5, the stress generated in the current reinforcing bar can be accurately measured.

次に、本実施形態の鉄筋継手を用いた応力計測方法（鉄筋継手の使用方法）について詳述する。   Next, a stress measurement method using the reinforcing bar joint of this embodiment (a method for using the reinforcing bar joint) will be described in detail.

図５は、ＲＣ構造物に鉄筋継手を適用した場合の例を示す図、図６は鉄筋継手の取付例を示す図である。   FIG. 5 is a view showing an example in which a reinforcing bar joint is applied to an RC structure, and FIG. 6 is a view showing an example of attaching a reinforcing bar joint.

例えば、鉄筋継手１０は応力解放法によりＲＣ構造物の内部応力を測定する際に好適に使用される。ＲＣ構造物は、内部に有する鉄筋が当該鉄筋の軸線方向に引っ張り応力を受けているため、応力解放法により鉄筋２を破断した際に、破断した箇所の鉄筋２の端部同士が離れるからである。   For example, the reinforcing bar joint 10 is preferably used when measuring the internal stress of the RC structure by the stress release method. In RC structure, because the reinforcing bars inside are subjected to tensile stress in the axial direction of the reinforcing bars, when the reinforcing bars 2 are broken by the stress release method, the ends of the broken reinforcing bars 2 are separated from each other. is there.

先ず、図５（ａ）に示すように、コンクリート２０ａを切り出し、調査対象となる既設構造物の内部に有する鉄筋２を露出させる。そして、鉄筋２の所定部に歪みゲージ３０を備える。   First, as shown to Fig.5 (a), concrete 20a is cut out and the reinforcement 2 which has the inside of the existing structure used as investigation object is exposed. And the strain gauge 30 is provided in the predetermined part of the reinforcing bar 2.

次に、図５（ｂ）、及び図６に示すように、鉄筋２と既設構造物２０との間に押圧体７を配置する。その際、押圧体７の筒状体７ａに鉄筋２を配置する。   Next, as shown in FIG. 5B and FIG. 6, the pressing body 7 is disposed between the reinforcing bar 2 and the existing structure 20. At that time, the reinforcing bars 2 are arranged on the cylindrical body 7 a of the pressing body 7.

次に、基台６の凹部６ａを押圧体７に装着し、ボルト等の固定具２５、２５、…、２５により基台６と押圧体７とを接続し、鉄筋２を固定する。これにより、支持体４、４によって鉄筋２を固定できる。   Next, the recess 6a of the base 6 is attached to the pressing body 7, and the base 6 and the pressing body 7 are connected by the fixtures 25, 25,. Thereby, the reinforcing bars 2 can be fixed by the supports 4 and 4.

次に、図５（ｃ）に示すように、支持体４、４間で鉄筋２を切断し、歪みゲージ３０により鉄筋２にかかる応力解放による戻り歪を計測する。   Next, as shown in FIG. 5C, the reinforcing bar 2 is cut between the supports 4 and 4, and the return strain due to the stress release applied to the reinforcing bar 2 is measured by the strain gauge 30.

次に、図示しないが、基台６の連結体５にＥＭセンサや鉄筋計等のように鉄筋の応力を計測できる応力計測装置を取り付ける。   Next, although not shown in the drawings, a stress measuring device capable of measuring the stress of a reinforcing bar such as an EM sensor or a reinforcing bar meter is attached to the connecting body 5 of the base 6.

最後に、コンクリートを流し込み処理を終了する。   Finally, the concrete pouring process is finished.

このようにすれば、鉄筋２を切断した際に、切断による鉄筋２を補強できる。また、切断した鉄筋２にかかる応力を連結体５に均一に分散することができる。そのため、この連結体５を通してＥＭセンサ等の応力計測装置を取り付けて応力等の測定を行ったとしても、現状鉄筋２に生じている応力を精度良く計測できる。   If it does in this way, when the rebar 2 is cut, the rebar 2 by cutting can be reinforced. Further, the stress applied to the cut reinforcing bars 2 can be uniformly dispersed in the connector 5. Therefore, even if a stress measuring device such as an EM sensor is attached through the connecting body 5 and the stress is measured, the stress generated in the current reinforcing bar 2 can be measured with high accuracy.

なお、鉄筋継手１０は、内部に有する鉄筋２が当該鉄筋の軸線方向に圧縮応力を受けているＰＣ構造物に適用しても構わない。   Note that the reinforcing bar joint 10 may be applied to a PC structure in which the reinforcing bar 2 included therein receives compressive stress in the axial direction of the reinforcing bar.

以上に説明したように、本願の鉄筋継手を用いた応力計測方法は、応力解放によってＲＣ構造物等の既設構造物の内部に有する鉄筋２の応力を計測する方法において、鉄筋２を切断する際に当該鉄筋２を補完するための鉄筋継手１０を用いる。この鉄筋継手１０は、切断する箇所における鉄筋２の一部を固定するための固定部を有する第１の支持体４と、切断する箇所における鉄筋２の他の一部を固定するための固定部を有する第２の支持体４と、鉄筋２と平行に配置され、第１及び第２の支持体４、４を連結するための少なくとも２本の連結体５、５と、を具備している。   As described above, the stress measurement method using the reinforcing bar joint of the present application is a method of measuring the stress of the reinforcing bar 2 included in an existing structure such as an RC structure by releasing the stress when cutting the reinforcing bar 2. The reinforcing bar joint 10 for complementing the reinforcing bar 2 is used. The reinforcing bar joint 10 includes a first support body 4 having a fixing part for fixing a part of the reinforcing bar 2 at a part to be cut, and a fixing part for fixing another part of the reinforcing bar 2 at a part to be cut. And a second support body 4 having at least two connecting bodies 5 and 5 which are arranged in parallel with the reinforcing bar 2 and connect the first and second support bodies 4 and 4. .

このようにすれば、鉄筋２を切断した際に、既設構造物をなるべく傷めずに切断した鉄筋２を補完できる。また、切断した鉄筋２にかかる応力を連結体５に均一に分散することができる。そのため、この連結体５を通して応力等の測定を行ったとしても、現状鉄筋に生じている応力を精度良く計測できる。   In this way, when the reinforcing bar 2 is cut, the cut reinforcing bar 2 can be complemented without damaging the existing structure as much as possible. Further, the stress applied to the cut reinforcing bars 2 can be uniformly dispersed in the connector 5. Therefore, even if the stress or the like is measured through the connecting body 5, the stress generated in the current reinforcing bar can be accurately measured.

なお、本実施形態は一形態であって、この形態に限定されるものではない。たとえば、連結体５を支持体４に固定する他の形態としては、基台６に有する連結孔９の内部に溝を設けるとともに、連結体５の端部に溝を設け、連結体５を連結孔９の溝と螺合させ連結体５を支持体４に固定するようにしてもよい。   In addition, this embodiment is one form and is not limited to this form. For example, as another form of fixing the connection body 5 to the support body 4, a groove is provided in the connection hole 9 of the base 6, and a groove is provided at an end of the connection body 5 to connect the connection body 5. The connecting body 5 may be fixed to the support body 4 by screwing with the groove of the hole 9.

また、支持体４の端部は角を丸めて形成されていてもよい。このようにすれば、鉄筋継手１０を所定の鉄筋２に取り付けた後の処理において、コンクリートを流し込み易くなる。   Moreover, the edge part of the support body 4 may be formed by rounding a corner | angular. If it does in this way, it will become easy to pour concrete in processing after attaching reinforcing bar joint 10 to predetermined reinforcing bar 2.

−第２の実施形態−
図７は第２の実施形態の鉄筋継手の外観図、図８は第２の実施形態の鉄筋継手の支持体の基台を示し、図８（ａ）は平面図、図８（ｂ）は図８（ａ）のＢ−Ｂ断面図である。 -Second Embodiment-
FIG. 7 is an external view of the reinforcing bar joint of the second embodiment, FIG. 8 shows a base of the reinforcing bar joint support of the second embodiment, FIG. 8A is a plan view, and FIG. It is BB sectional drawing of Fig.8 (a).

この鉄筋継手４０は、好適には、応力解放法によってＰＣ構造物等の内部の鉄筋２に圧縮応力がかかる既設構造物の内部応力を計測する際に用いられ、当該鉄筋継手４０は、当該応力解放の際の鉄筋２の切断時の当該鉄筋２を補完し、現状鉄筋２に生じる応力の計測をするためのものであり、当該鉄筋２に装着される。   The rebar joint 40 is preferably used when measuring the internal stress of an existing structure in which a compressive stress is applied to the internal rebar 2 of the PC structure or the like by a stress release method. The reinforcing bar 2 is supplemented with the reinforcing bar 2 when the reinforcing bar 2 is cut at the time of release, and the stress generated in the current reinforcing bar 2 is measured.

図７に示すように、鉄筋継手４０は、同一の鉄筋、又は異なる鉄筋同士を固定するための支持体４１を備える。この支持体４１により、例えば応力解放法によって切断された鉄筋同士を接続する。   As shown in FIG. 7, the reinforcing bar joint 40 includes a support body 41 for fixing the same reinforcing bar or different reinforcing bars. By this support body 41, reinforcing bars cut by, for example, a stress release method are connected to each other.

支持体４１は、一方の端部から他方の端部に延びるように鉄筋２を固定するための鉄筋固定部４２を有している。また、支持体４１は、２枚の基台４３と、基台４３を固定するための固定具４５、４５、…、４５と、から構成される。   The support body 41 has a reinforcing bar fixing portion 42 for fixing the reinforcing bar 2 so as to extend from one end portion to the other end portion. The support body 41 includes two bases 43 and fixtures 45, 45,... 45 for fixing the bases 43.

基台４３は、図８に示すように、一端面上に凹部４３ａを有する。また、凹部４３ａは略半円状の筒状体４３ｂに形成されている。また、筒状体４３ｂは基台４３の軸線方向に延びるように形成されている。この筒状体４３ｂには鉄筋２が配置される。また、基台４３の軸線方向に延びる筒状体４３ｂの中間点近傍には鉄筋の先端を支持するためのストッパ４３ｃを備えている。このストッパ４３ｃにより、鉄筋固定部４２は、例えば、破断した鉄筋箇所の一方の端部の鉄筋２を固定する領域（本発明の第１の固定部に相当する。）と他方の端部の鉄筋２を固定する領域（本発明の第２の固定部に相当する。）とに分けられる。また、筒状体４３ｂは、鉄筋２を滑りにくくするための複数の溝４４を備えている。また、筒状体４３ｂは焼入れされている。この溝４４は、鉄筋２が滑るのを防止するためのグリップ手段として機能する。   As shown in FIG. 8, the base 43 has a recess 43a on one end surface. The recess 43a is formed in a substantially semicircular cylindrical body 43b. The cylindrical body 43 b is formed so as to extend in the axial direction of the base 43. The reinforcing bar 2 is disposed on the cylindrical body 43b. A stopper 43c for supporting the tip of the reinforcing bar is provided in the vicinity of the intermediate point of the cylindrical body 43b extending in the axial direction of the base 43. By this stopper 43c, the reinforcing bar fixing part 42, for example, a region (corresponding to the first fixing part of the present invention) for fixing the reinforcing bar 2 at one end of the broken reinforcing bar location and the reinforcing bar at the other end. 2 is a region for fixing 2 (corresponding to a second fixing portion of the present invention). Moreover, the cylindrical body 43b includes a plurality of grooves 44 for making the rebar 2 difficult to slip. Moreover, the cylindrical body 43b is quenched. This groove 44 functions as a grip means for preventing the rebar 2 from sliding.

また、基台４３の一端面上であって、筒状体４３ｂの両側部には筒状体４３ｂの軸線方向に沿って鉛直方向に複数の貫通孔４６、４６、…、４６を有する。   Further, on one end surface of the base 43, both side portions of the cylindrical body 43b have a plurality of through holes 46, 46, ..., 46 in the vertical direction along the axial direction of the cylindrical body 43b.

また、支持体４１は２枚の基台４３の凹部４３ａを対向させ合わされて形成される。また、貫通孔４６にはボルト等の固定具４５が装着され、２枚の基台４３が密着して支持体４１が形成される。   Further, the support body 41 is formed with the concave portions 43a of the two bases 43 facing each other. A fixing tool 45 such as a bolt is attached to the through hole 46, and the two bases 43 are brought into close contact with each other to form the support body 41.

次に、本実施形態における鉄筋継手を用いた応力計測方法（鉄筋継手の使用方法）について詳述する。   Next, the stress measuring method using the reinforcing bar joint in this embodiment (usage method of the reinforcing bar joint) will be described in detail.

図９は、ＰＣ構造物に鉄筋継手を適用した場合の例を示す図である。   FIG. 9 is a diagram illustrating an example in which a reinforcing bar joint is applied to a PC structure.

例えば、鉄筋継手４０は応力解放法によりＰＣ構造物の内部応力を測定する際に好適に使用される。ＰＣ構造物は、内部に有する鉄筋が当該鉄筋の軸線方向に圧縮応力を受けているため、応力解放法により鉄筋２を破断しても、破断した鉄筋２の端部同士は離れないからである。   For example, the reinforcing bar joint 40 is preferably used when measuring the internal stress of the PC structure by the stress release method. In the PC structure, because the reinforcing bars inside are subjected to compressive stress in the axial direction of the reinforcing bars, even if the reinforcing bars 2 are broken by the stress release method, the ends of the broken reinforcing bars 2 are not separated from each other. .

先ず、図９（ａ）に示すように、コンクリート５０を切り出し、調査対象となる既設構造物の内部に有する鉄筋２を露出させ、鉄筋２の所定部に歪みゲージ５１を配置する。   First, as shown in FIG. 9A, the concrete 50 is cut out, the rebar 2 included in the existing structure to be investigated is exposed, and the strain gauge 51 is disposed at a predetermined portion of the rebar 2.

次に、図９（ｂ）に示すように、調査対象となる鉄筋２を切断し、歪みゲージ５１によって鉄筋２にかかる応力解放法による戻り歪を計測する。   Next, as shown in FIG. 9 (b), the reinforcing bar 2 to be investigated is cut, and the return strain applied to the reinforcing bar 2 by the stress release method is measured by the strain gauge 51.

次に、図９（ｃ）に示すように、鉄筋２の破断した箇所に鉄筋継手４０を配置し、鉄筋２を固定する。具体的には、破断した箇所の鉄筋２の端部を一方の基台４３の凹部４３ａに配置し、他方の基台４３を合わせてボルト等の固定具４５により支持体４１を形成し、鉄筋２を固定する。   Next, as shown in FIG.9 (c), the reinforcing bar joint 40 is arrange | positioned in the location which the reinforcing bar 2 fractured, and the reinforcing bar 2 is fixed. Specifically, the end of the broken reinforcing bar 2 is disposed in the recess 43a of one base 43, and the other base 43 is combined to form the support body 41 with a fixture 45 such as a bolt. 2 is fixed.

その後、鉄筋２の所定部にＥＭセンサや鉄筋計等のように応力を計測できる応力計測装置を取り付ける。   Thereafter, a stress measuring device capable of measuring stress, such as an EM sensor or a reinforcing bar meter, is attached to a predetermined portion of the reinforcing bar 2.

最後に、コンクリートを流し込み処理を終了する。   Finally, the concrete pouring process is finished.

以上に説明したように、本願の鉄筋継手４０は、鉄筋２を切断して応力解放により応力を計測した際の当該鉄筋２を補完するための鉄筋継手４０であって、切断した箇所における鉄筋２の一方の端部を固定するための第１の固定部と、切断した箇所における鉄筋２の他方の端部を固定するための第２の固定部と、を有する支持体４１を備えている。このようにすれば、鉄筋２を切断した際に、既設構造物をなるべく傷めずに切断した鉄筋２を補完できる。また、現状鉄筋に生じている応力を精度良く計測できる。   As described above, the rebar joint 40 of the present application is a rebar joint 40 for complementing the rebar 2 when the rebar 2 is cut and the stress is measured by releasing the stress, and the rebar 2 at the cut position. The support body 41 which has the 1st fixing | fixed part for fixing one edge part of this, and the 2nd fixing | fixed part for fixing the other edge part of the reinforcing bar 2 in the cut | disconnected location is provided. In this way, when the reinforcing bar 2 is cut, the cut reinforcing bar 2 can be complemented without damaging the existing structure as much as possible. Moreover, the stress which has arisen in the present reinforcing bar can be measured with high accuracy.

なお、この鉄筋継手４０は、内部に有する鉄筋が当該鉄筋の軸線方向に圧縮応力を受けているＲＣ構造物に適用しても構わない。   Note that the reinforcing bar joint 40 may be applied to an RC structure in which the reinforcing bar included therein receives compressive stress in the axial direction of the reinforcing bar.

図１０は、ＲＣ構造物に鉄筋継手を適用した場合の例を示す図である。   FIG. 10 is a diagram illustrating an example in which a reinforcing bar joint is applied to an RC structure.

先ず、図１０（ａ）に示すように、コンクリート５０を切り出し、調査対象となる既設構造物の内部に有する鉄筋２を露出させ、鉄筋２の所定部に歪みゲージ５１を配置する。   First, as shown in FIG. 10A, the concrete 50 is cut out, the rebar 2 included in the existing structure to be investigated is exposed, and the strain gauge 51 is disposed at a predetermined portion of the rebar 2.

次に、図１０（ｂ）に示すように、調査対象となる鉄筋２を切断し、歪みゲージ５１によって、鉄筋２にかかる応力解放法による戻り歪を計測する。   Next, as shown in FIG. 10 (b), the reinforcing bar 2 to be investigated is cut, and the return strain applied to the reinforcing bar 2 by the stress release method is measured by the strain gauge 51.

次に、図１０（ｃ）に示すように、次に、破断した鉄筋の端部同士の距離が所定の長さｓとなるように鉄筋２を切断して破断した鉄筋間の距離を調整する。   Next, as shown in FIG. 10C, next, the distance between the broken reinforcing bars is adjusted by cutting the reinforcing bar 2 so that the distance between the ends of the broken reinforcing bars becomes a predetermined length s. .

次に、図１０（ｄ）に示すように、破断した鉄筋２の端部間に所定の補助鉄筋５５を挿入し、当該補助鉄筋５５の両端部と破断した鉄筋２の端部を鉄筋継手４０により接続し、補助鉄筋５５を介して鉄筋２を固定する。具体的には、破断した鉄筋２の端部と補助鉄筋５５の一方の端部とを一方の基台４３の凹部４３ａに配置し、他方の基台４３を合わせてボルト等の固定具４５により支持体４１を形成し、鉄筋２と補助鉄筋５５とを固定する。   Next, as shown in FIG. 10 (d), predetermined auxiliary reinforcing bars 55 are inserted between the ends of the broken reinforcing bars 2, and both ends of the auxiliary reinforcing bars 55 and the ends of the broken reinforcing bars 2 are connected to the reinforcing bar joint 40. And the reinforcing bar 2 is fixed via the auxiliary reinforcing bar 55. Specifically, the end of the broken reinforcing bar 2 and one end of the auxiliary reinforcing bar 55 are arranged in the recess 43a of one base 43, and the other base 43 is put together by a fixture 45 such as a bolt. The support body 41 is formed, and the reinforcing bar 2 and the auxiliary reinforcing bar 55 are fixed.

その後、鉄筋２の所定部にＥＭセンサや鉄筋計等のように応力を計測できる応力計測装置を取り付ける。また、予め、補助鉄筋５５にＥＭセンサ等の応力計測装置を取り付けておいてもよい。   Thereafter, a stress measuring device capable of measuring stress, such as an EM sensor or a reinforcing bar meter, is attached to a predetermined portion of the reinforcing bar 2. Further, a stress measuring device such as an EM sensor may be attached to the auxiliary reinforcing bar 55 in advance.

最後に、コンクリートを流し込み処理を終了する。   Finally, the concrete pouring process is finished.

以上に説明したように、本実施形態の鉄筋継手４０は、鉄筋２を切断して応力解放により応力を計測した際に前記切断した箇所の鉄筋２の両端部の間に補助鉄筋５５を挿入して当該鉄筋２を補完するための鉄筋継手４０であって、切断した箇所における鉄筋２の一方の端部を固定するための第１の固定部と、切断した箇所における鉄筋２の他方の端部を固定するための第２の固定部と、を有する支持体４１を備えている。このようにすれば、鉄筋２を切断した際に、既設構造物をなるべく傷めずに切断した鉄筋２を補完できる。また、現状鉄筋に生じている応力を精度良く計測できる。   As described above, the reinforcing bar joint 40 according to the present embodiment inserts the auxiliary reinforcing bar 55 between the both ends of the cut reinforcing bar 2 when the reinforcing bar 2 is cut and the stress is measured by releasing the stress. A reinforcing bar joint 40 for complementing the reinforcing bar 2, the first fixing part for fixing one end of the reinforcing bar 2 at the cut location, and the other end of the reinforcing bar 2 at the cut location The support body 41 which has a 2nd fixing | fixed part for fixing. In this way, when the reinforcing bar 2 is cut, the cut reinforcing bar 2 can be complemented without damaging the existing structure as much as possible. Moreover, the stress which has arisen in the present reinforcing bar can be measured with high accuracy.

また、本実施形態の鉄筋継手４０を用いた応力計測方法は、応力解放によって既設構造物の内部に有する鉄筋２の応力を計測する方法であって、前記鉄筋を切断する際に当該鉄筋を補完するための鉄筋継手４０を用いる。この鉄筋継手４０は、切断する箇所における鉄筋２の一方の端部を固定するための第１の固定部４２と、前記切断箇所における鉄筋の他方の端部を固定するための第２の固定部４２と、を有する支持体４１を備えている。   Moreover, the stress measurement method using the reinforcing bar joint 40 of the present embodiment is a method of measuring the stress of the reinforcing bar 2 included in the existing structure by releasing the stress, and complements the reinforcing bar when cutting the reinforcing bar. Reinforcing bar joint 40 is used. The reinforcing bar joint 40 includes a first fixing part 42 for fixing one end of the reinforcing bar 2 at a location to be cut, and a second fixing part for fixing the other end of the reinforcing bar at the cutting location. 42. The support body 41 which has 42. is provided.

このようにすれば、鉄筋２を切断した際に、既設構造物をなるべく傷めずに切断した鉄筋２を補完できる。また、現状鉄筋に生じている応力を精度良く計測できる。   In this way, when the reinforcing bar 2 is cut, the cut reinforcing bar 2 can be complemented without damaging the existing structure as much as possible. Moreover, the stress which has arisen in the present reinforcing bar can be measured with high accuracy.

第１の実施形態の鉄筋継手の外観図である。It is an external view of the rebar joint of a 1st embodiment. 図１のＡ−Ａ断面図である。It is AA sectional drawing of FIG. 第１の実施形態の鉄筋継手の支持体の基台を示し、図３（ａ）は平面図、図３（ｂ）は右側面図である。The base of the support body of the rebar joint of 1st Embodiment is shown, Fig.3 (a) is a top view, FIG.3 (b) is a right view. 第１の実施形態の鉄筋継手の支持体の押圧体を示し、図４（ａ）は平面図、図４（ｂ）は右側面図である。The press body of the support body of the reinforcing bar joint of 1st Embodiment is shown, Fig.4 (a) is a top view, FIG.4 (b) is a right view. ＲＣ構造物に第１の実施形態の鉄筋継手を適用した場合の例を示す図である。It is a figure which shows the example at the time of applying the reinforcing bar joint of 1st Embodiment to RC structure. 第１の実施形態の鉄筋継手の取付例を示す図である。It is a figure which shows the example of attachment of the reinforcing bar joint of 1st Embodiment. 第２の実施形態の鉄筋継手の外観図である。It is an external view of the reinforcing bar joint of 2nd Embodiment. 第２の実施形態の鉄筋継手の支持体の基台を示し、図８（ａ）は平面図、図８（ｂ）は図８（ａ）のＢ−Ｂ断面図である。The base of the support body of the reinforcing bar joint of 2nd Embodiment is shown, FIG. 8 (a) is a top view, FIG.8 (b) is BB sectional drawing of Fig.8 (a). ＰＣ構造物に鉄筋継手を適用した場合の例を示す図である。It is a figure which shows the example at the time of applying a reinforcing bar joint to PC structure. ＲＣ構造物に鉄筋継手を適用した場合の例を示す図である。It is a figure which shows the example at the time of applying a reinforcing bar joint to RC structure.

符号の説明Explanation of symbols

２ 鉄筋
４、４１ 支持体
５ 連結体
６ 基台
６ａ 凹部
６ｂ 筒状体
７ 押圧体
７ａ 筒状体
１０、４０ 鉄筋継手 2 Reinforcing bars 4, 41 Support body 5 Coupling body 6 Base 6a Recessed part 6b Tubular body 7 Pressing body 7a Tubular body 10, 40 Reinforcing bar joint

Claims (7)

応力解放によって既設構造物の内部に有する鉄筋の応力を計測する方法において、前記鉄筋を切断する際に当該鉄筋を補完するための鉄筋継手を用いることを特徴とする鉄筋継手を用いた応力計測方法。   A method for measuring stress of a reinforcing bar in an existing structure by releasing stress, wherein a reinforcing bar joint for complementing the reinforcing bar is used when cutting the reinforcing bar. . 前記鉄筋継手は、
前記切断する箇所における鉄筋の一部を固定するための固定部を有する第１の支持体と、
前記切断する箇所における鉄筋の他の一部を固定するための固定部を有する第２の支持体と、
前記鉄筋と平行に配置され、前記第１及び第２の支持体を連結するための少なくとも２本の連結体と、
を具備することを特徴とする請求項１に記載の鉄筋継手を用いた応力計測方法。 The rebar joint is
A first support body having a fixing portion for fixing a part of the reinforcing bar at the location to be cut;
A second support body having a fixing portion for fixing another part of the reinforcing bar at the location to be cut;
At least two connectors for connecting the first and second supports, which are arranged in parallel with the reinforcing bars;
The stress measurement method using the reinforcing bar joint according to claim 1. 前記鉄筋継手は、
前記切断する箇所における鉄筋の一方の端部を固定するための第１の固定部と、前記切断箇所における鉄筋の他方の端部を固定するための第２の固定部と、を有する支持体であることを特徴とする請求項１に記載の鉄筋継手を用いた応力計測方法。 The rebar joint is
A support body having a first fixing portion for fixing one end portion of the reinforcing bar at the cutting location and a second fixing portion for fixing the other end portion of the reinforcing bar at the cutting location. The stress measuring method using the reinforcing bar joint according to claim 1. 鉄筋の一部を固定するための固定部を有する第１の支持体と、
前記鉄筋の他の一部を固定するための固定部を有する第２の支持体と、
前記鉄筋と平行に配置され、前記第１及び第２の支持体を連結するための少なくとも２本の連結体と、
を具備することを特徴とする鉄筋継手。 A first support having a fixing part for fixing a part of the reinforcing bar;
A second support having a fixing part for fixing the other part of the reinforcing bar;
At least two connectors for connecting the first and second supports, which are arranged in parallel with the reinforcing bars;
Reinforcing bar joint characterized by comprising. 前記鉄筋の軸に対して直交する方向の断面において、
前記連結体は、少なくとも２本有し、当該連結体の軸と鉄筋の軸とを結ぶ線によって形成される前記鉄筋の軸回りの角度がすべて同一になるように配置されることを特徴とする請求項４に記載の鉄筋継手。 In a cross section in a direction perpendicular to the axis of the reinforcing bar,
The connecting body has at least two, and is arranged so that the angles around the rebar axis formed by a line connecting the connecting body axis and the reinforcing bar axis are all the same. The reinforcing bar joint according to claim 4. 前記第１、及び第２の支持体は、前記鉄筋に沿って対向して設けられていることを特徴とする請求項４に記載の鉄筋継手。   The rebar joint according to claim 4, wherein the first and second support bodies are provided to face each other along the rebar. 前記第１、及び第２の支持体は、前記鉄筋を支持するための略半円状の筒状体を有するとともに凹部を有する基台と、前記基台の凹部に前記鉄筋を押圧して固定するための略半円状の筒状体を有する押圧体と、を具備し、
前記基台、及び押圧体に有する筒状体には前記鉄筋が滑るのを防止するためのグリップ手段を備えていることを特徴とする請求項４に記載の鉄筋継手。 The first and second support bodies have a substantially semicircular cylindrical body for supporting the reinforcing bars and a base having a recess, and the reinforcing bars are pressed and fixed to the recess of the base. A pressing body having a substantially semicircular cylindrical body for
5. The reinforcing bar joint according to claim 4, wherein the base body and the cylindrical body included in the pressing body are provided with grip means for preventing the reinforcing bar from slipping.
JP2004108254A 2004-03-31 2004-03-31 Stress-measuring method using reinforcement joint, and reinforcement joint Pending JP2005291957A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011180063A (en) * 2010-03-03 2011-09-15 Railway Technical Research Institute Method and system for detecting breaking of pc steel in prestressed concrete structure
JP2013217840A (en) * 2012-04-11 2013-10-24 Tokyo Electric Power Co Inc:The Method for measuring stress of reinforcement
CN114688948A (en) * 2022-03-03 2022-07-01 四川高速公路建设开发集团有限公司 Reinforcing bar connecting sleeve detection device

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50100819A (en) * 1973-11-28 1975-08-09
JPS51117853U (en) * 1974-11-12 1976-09-24
JPS6065660U (en) * 1983-08-22 1985-05-09 株式会社　須山工業所 Simple on-site yield tester for reinforcing bars during construction work
JPS6085317U (en) * 1983-11-10 1985-06-12 中井　鐵男 Iron wire connector for connecting blocks
JPS63186818U (en) * 1987-05-25 1988-11-30
JPH0329825A (en) * 1989-06-28 1991-02-07 Mitsubishi Heavy Ind Ltd Detecting method of stress of reinforcing rod of existing structure
JPH03189527A (en) * 1989-12-20 1991-08-19 Mitsubishi Heavy Ind Ltd Detecting method for reinforcing bar stress of existent structure
JPH0636329Y2 (en) * 1991-12-20 1994-09-21 有限会社小澤特殊技研 Deformed steel bar fittings

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50100819A (en) * 1973-11-28 1975-08-09
JPS51117853U (en) * 1974-11-12 1976-09-24
JPS6065660U (en) * 1983-08-22 1985-05-09 株式会社　須山工業所 Simple on-site yield tester for reinforcing bars during construction work
JPS6085317U (en) * 1983-11-10 1985-06-12 中井　鐵男 Iron wire connector for connecting blocks
JPS63186818U (en) * 1987-05-25 1988-11-30
JPH0329825A (en) * 1989-06-28 1991-02-07 Mitsubishi Heavy Ind Ltd Detecting method of stress of reinforcing rod of existing structure
JPH03189527A (en) * 1989-12-20 1991-08-19 Mitsubishi Heavy Ind Ltd Detecting method for reinforcing bar stress of existent structure
JPH0636329Y2 (en) * 1991-12-20 1994-09-21 有限会社小澤特殊技研 Deformed steel bar fittings

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011180063A (en) * 2010-03-03 2011-09-15 Railway Technical Research Institute Method and system for detecting breaking of pc steel in prestressed concrete structure
JP2013217840A (en) * 2012-04-11 2013-10-24 Tokyo Electric Power Co Inc:The Method for measuring stress of reinforcement
CN114688948A (en) * 2022-03-03 2022-07-01 四川高速公路建设开发集团有限公司 Reinforcing bar connecting sleeve detection device
CN114688948B (en) * 2022-03-03 2023-12-29 四川高速公路建设开发集团有限公司 Reinforcing bar connecting sleeve detection device

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