JP3989474B2 - Prestress force introduction device anchoring structure and prestressed joint structure - Google Patents

Prestress force introduction device anchoring structure and prestressed joint structure Download PDF

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JP3989474B2
JP3989474B2 JP2004231337A JP2004231337A JP3989474B2 JP 3989474 B2 JP3989474 B2 JP 3989474B2 JP 2004231337 A JP2004231337 A JP 2004231337A JP 2004231337 A JP2004231337 A JP 2004231337A JP 3989474 B2 JP3989474 B2 JP 3989474B2
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diameter
anchor hole
anchor
prestress
hole
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JP2006045997A (en
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幸正 楢村
浩幸 阿部
一壽 中橋
康衛 八木沢
和弘 槌田
茂樹 岩渕
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SANKO TECHONO CO.,LTD.
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Description

本発明は、土木建築で多く使われているPC鋼材を備えたプレストレス力導入装置を使用したプレストレス力導入装置の定着構造およびプレストレス式の接合構造に関する。   The present invention relates to a fixing structure of a prestressing force introduction device using a prestressing force introduction device provided with a PC steel material often used in civil engineering and a prestressed joint structure.

従来、既設コンクリート構造物に他部材を接合する場合、これまで既設コンクリート構造物側に多数の後施工アンカーを固定したり、あるいは多数の鉄筋を固定して、他部材を接合していた。   Conventionally, when joining other members to an existing concrete structure, a number of post-construction anchors have been fixed to the existing concrete structure side, or a number of reinforcing bars have been fixed to join the other members.

しかし、このような場合、数多くの後施工アンカーを打つ必要があり、また、あるいは多数の鉄筋を固定する必要があるため、多くの費用および手間を要し施工コストが高くなっていた。また、このような接合方式の特徴として、後施工アンカー又は鉄筋などを一方のコンクリート部材に接合する場合、後施工アンカー又は鉄筋などにはプレストレスが導入されていないので、引張りなどが接合部にかかった場合、鉄筋の強度がそのまま接合強度に影響する。   However, in such a case, it is necessary to hit a large number of post-construction anchors, or it is necessary to fix a large number of reinforcing bars, which requires a lot of costs and labor, and the construction cost is high. In addition, as a feature of such a joining method, when post-construction anchors or reinforcing bars are joined to one concrete member, pre-stress is not introduced to the post-construction anchors or reinforcing bars, so tension is applied to the joints. When applied, the strength of the reinforcing bars directly affects the joint strength.

このような非プレストレス式の接合構造に対して、接合箇所を少なく経済的に接合できる接合方式としてプレストレス式の接合構造がある。例えば、図9(a)(b)に示すように、既設コンクリート構造物等の一方のコンクリート部材1と接合すべきコンクリートブロック5等の他方の部材5a,5bにそれぞれ貫通した孔2,3を設け、支承用凹溝あるいは支承側面18に支圧プレート19を係合することができる場合には、中空PC鋼棒6およびその中に押し込み用反力PC鋼棒7を備えたプレストレス力導入装置8を貫通配置して、貫通した孔2,3および接合目地部にグラウト17からなる充填材を充填・硬化した後、前記中空PC鋼棒6の両端部の雄ねじ軸部にナットからなるアンカー材37および支圧プレート19を緊張定着することにより、中空PC鋼棒6を緊張定着し、コンクリート部材1,5(5a,5b)にプレストレスを導入して、コンクリート部材相互を強固に一体に接合することができる。   In contrast to such a non-prestressed joint structure, there is a prestressed joint structure as a joint system that can be joined economically with few joints. For example, as shown in FIGS. 9 (a) and 9 (b), holes 2 and 3 penetrating through the other members 5a and 5b such as a concrete block 5 to be joined to one concrete member 1 such as an existing concrete structure are provided. When the support plate 19 can be engaged with the support recessed groove or the support side face 18, the prestress force introduction including the hollow PC steel rod 6 and the pushing reaction force PC steel rod 7 therein is introduced. After the device 8 is disposed through, the fillers made of grout 17 are filled and hardened in the through holes 2 and 3 and the joint joints, and then the anchors made of nuts are formed on the male screw shafts at both ends of the hollow PC steel rod 6. By fixing the material 37 and the bearing plate 19 in tension, the hollow PC steel bar 6 is tensioned and fixed, and prestress is introduced into the concrete members 1 and 5 (5a, 5b), so that the concrete members Strongly it can be joined together.

前記のように貫通した貫通孔2,3を設けることができる場合には、部材相互を簡単に確実に接合することができる。しかし、既設コンクリート構造物等の一方のコンクリート部材に貫通した孔が設けることができない場合、例えば図8に示すように、一方のコンクリート部材1に設けるアンカー孔4が袋孔の場合のプレストレス力導入装置8を使用した接合構造では、中空PC鋼棒6はプレストレスが導入され接合しているので、引張りが作用した場合、中空PC鋼棒(PC鋼材)6の強度そのままに影響されるのでなく、圧縮された状態から引張りに変わりその強度まで引張りに抵抗するようになり、したがって、PC鋼材と充填材(グラウト)17の付着力は充分であっても、充填材17と一方のコンクリート部材1との付着が充分期待できない場合には、多数のプレストレス力導入装置8を設けて対応することになり経済的でなくなる。   When the through holes 2 and 3 penetrating as described above can be provided, the members can be easily and reliably joined to each other. However, when a hole penetrating one concrete member such as an existing concrete structure cannot be provided, for example, as shown in FIG. 8, the prestressing force when the anchor hole 4 provided in one concrete member 1 is a bag hole is used. In the joining structure using the introduction device 8, the hollow PC steel rod 6 is joined by prestressing, and therefore, when tension is applied, the strength of the hollow PC steel rod (PC steel material) 6 is affected as it is. However, even if the adhesive strength between the PC steel material and the filler (grout) 17 is sufficient, the filler 17 and one concrete member are changed. When adhesion with 1 cannot be expected sufficiently, a large number of prestress force introduction devices 8 are provided to cope with it, which is not economical.

また、分割型楔片をアンカー孔内壁に強固に押圧して強制的に拡開して拡径したアンカー孔を形成することも知られているが、分割型楔片間は拡径変形されていないアンカー孔となり、全周面が拡径アンカー孔でないので方向特性が生じるばかりでなく、このような拡径アンカー孔内周面は圧壊破壊されて脆くなっているという問題がある。(例えば、特許文献1参照)   It is also known that the split-type wedge pieces are firmly pressed against the inner wall of the anchor hole to forcibly expand to form an enlarged anchor hole. Since there is no anchor hole and the entire circumferential surface is not a diameter-enlarged anchor hole, not only the directional characteristics are produced, but also the inner circumferential surface of such a diameter-enlarged anchor hole is crushed and broken. (For example, see Patent Document 1)

また、アンカー孔内周面を押圧して拡径する拡径溝では、アンカー孔内周面の拡径溝の溝深さは比較的浅く、拡径した溝がアンカー孔全周面に設けられないので、周方向の部分的に拡径した部分全体にわたりグラウト材を確実に充填させることが難しく、グラウト充填の確実性の問題もあるという課題もある。
また、コンクリート構造物の長尺のアンカー孔内にプレストレス力導入装置を配置すると共に充填材を充填・硬化し、プレストレス力導入装置におけるPC鋼材を緊張してコンクリート構造物を部分的に圧縮プレストレスを導入して補強する場合にも、より確実強固に定着させて高いプレストレス力導入により補強することが望まれる。
特開10−131302号公報
Further, in the diameter-enlarged groove that expands the diameter by pressing the inner peripheral surface of the anchor hole, the groove depth of the expanded-diameter groove on the inner peripheral surface of the anchor hole is relatively shallow, and the expanded diameter groove is not provided on the entire peripheral surface of the anchor hole. There is also a problem that it is difficult to reliably fill the grout material over the entire partially expanded diameter in the circumferential direction, and there is also a problem of certainty of grout filling.
In addition, a prestress force introduction device is placed in the long anchor hole of the concrete structure, and the filler is filled and hardened, and the PC steel material in the prestress force introduction device is tensioned to partially compress the concrete structure. Even when prestress is introduced and reinforced, it is desired that the prestress be firmly fixed and reinforced by introducing a high prestress force.
JP 10-131302 A

そこで本発明は、前記のようなコンクリート構造物に圧縮プレストレスを導入して補強する場合に有利でプレストレス力導入装置の使用本数を低減することができるプレストレス力導入装置の定着構造を提供することを目的とする。
また、前記の定着構造を利用したプレストレス式の接合構造において、充填材と一方のコンクリート部材との付着を充分期待することができ、プレストレス力導入装置の使用本数を低減することができるプレストレス式の接合構造を提供することを目的とする。
Accordingly, the present invention provides a fixing structure for a prestressing force introduction device that is advantageous in the case of reinforcing by compressing prestress into the concrete structure as described above and can reduce the number of prestressing force introduction devices used. The purpose is to do.
In addition, in the prestressed joint structure using the fixing structure, it is possible to sufficiently expect the filler and one concrete member to adhere to each other, and the number of prestressing force introduction devices used can be reduced. An object is to provide a stress-type bonding structure.

前記の課題を有利に解決するために、第1発明のプレストレス力導入装置の定着構造においては、既設のコンクリート部材またはコンクリート構造物に切削加工により設けたアンカー孔内に、内部に押し込み用反力PC鋼棒を押込むことで緊張された中空PC鋼棒を備えたプレストレス力導入装置を配置すると共に、前記アンカー孔と前記プレストレス力導入装置との間に充填材を充填して硬化させて、前記コンクリート部材またはコンクリート構造物にプレストレスを導入するプレストレス力導入装置の定着構造において、前記アンカー孔は、アンカー孔軸方向に伸び、直径が前記プレストレス力導入装置の外形よりも大きい小径アンカー孔と、前記小径アンカー孔の奥部にこの小径アンカー孔よりも大径の環状溝が前記小径アンカー孔と同心状にアンカー孔軸方向に間隔をおいて複数、前記小径アンカー孔の奥部内周面を周方向に均一にビットを備えている拡径溝形成装置により切削して形成された大径環状係止溝部とを備えた大径環状係止溝部付アンカー孔であり、かつ前記プレストレス力導入装置の先端側の定着部は、前記大径環状係止溝部の領域または前記大径環状係止溝部より奥部の領域に位置するように配置されていることを特徴とする。 In order to advantageously solve the above-described problem, in the fixing structure of the prestressing force introducing device according to the first aspect of the present invention, the reaction force for pushing into the anchor hole provided by cutting in the existing concrete member or concrete structure is provided. A prestressing force introducing device provided with a hollow PC steel rod that has been tensioned by pushing a strong PC steel rod is disposed, and a filler is filled between the anchor hole and the prestressing force introducing device and cured. In the fixing structure of the prestress force introduction device that introduces prestress into the concrete member or the concrete structure, the anchor hole extends in the anchor hole axial direction, and the diameter is larger than the outer shape of the prestress force introduction device. large and small anchor hole, an annular groove having a diameter larger than the diameter anchor holes in the back portion of the smaller diameter anchor holes and the small-diameter anchor holes Heart shape at intervals in the anchor Anajiku direction more, large diameter annular locking formed by cutting by it has expanded groove forming apparatus provided with a uniform bit deep inner peripheral surface of the small-diameter anchor holes in the circumferential direction An anchor hole with a large-diameter annular locking groove and a fixing portion on the tip side of the prestress force introducing device is a region of the large-diameter annular locking groove or the large-diameter annular locking groove It arrange | positions so that it may be located in the area | region of a back part.

また、第2発明のプレストレス式の接合構造においては、既設のコンクリート部材またはコンクリート構造物に切削加工により設けたアンカー孔と、他部材に設けたプレストレス力導入装置配置用孔とにわたって、内部に押し込み用反力PC鋼棒を押込むことで緊張された中空PC鋼棒を備えたプレストレス力導入装置を配置すると共に、前記アンカー孔および前記プレストレス力導入装置配置用孔と前記プレストレス力導入装置との間に充填材を充填して硬化させ、前記コンクリート部材または前記コンクリート構造物と前記他部材とをプレストレスを導入するように接合するプレストレス式の接合構造において、前記プレストレス力導入装置配置用孔及び前記アンカー孔の直径は前記プレストレス力導入装置の外形よりも大きく、前記アンカー孔は、アンカー孔軸方向に伸びる小径アンカー孔と、前記小径アンカー孔の奥部にこの小径アンカー孔よりも大径の環状溝が前記小径アンカー孔と同心状にアンカー孔軸方向に間隔をおいて複数、前記小径アンカー孔の奥部内周面を周方向に均一にビットを備えている拡径溝形成装置により切削して形成された大径環状係止溝部とを備えた大径環状係止溝部付アンカー孔であり、かつ前記プレストレス力導入装置は、先端側の定着部が前記大径環状係止溝部の領域または大径環状係止溝部より奥部の領域に位置するように配置され、後端側が前記プレストレス力導入装置配置用孔内における外部に近い位置に配置されていることを特徴とする。 Further, in the prestressed joint structure according to the second aspect of the present invention, the interior of the existing concrete member or concrete structure spans between the anchor hole provided by cutting and the prestress force introduction device arranging hole provided in the other member. A prestressing force introducing device including a hollow PC steel rod that is tensioned by pushing a pushing reaction force PC steel rod into the anchoring hole, the prestressing force introducing device arranging hole, and the prestress In the prestress type joining structure in which a filler is filled between the force introduction device and cured, and the concrete member or the concrete structure and the other member are joined so as to introduce prestress. The diameter of the force introduction device arranging hole and the anchor hole is larger than the outer shape of the prestress force introduction device, and Car holes, and small-diameter anchor holes extending in the anchor Anajiku direction, the distance to the anchor Anajiku direction inner portion an annular groove having a diameter larger than the diameter anchor holes into the small-diameter anchor hole and concentric of the small anchor hole And a large-diameter annular engagement member formed by cutting a plurality of large-diameter annular locking grooves formed on the inner peripheral surface of the inner portion of the small-diameter anchor hole uniformly in the circumferential direction. The anchor hole with a stop groove portion, and the prestress force introduction device is arranged such that the fixing portion on the tip side is located in the region of the large-diameter annular locking groove portion or the region deeper than the large-diameter annular locking groove portion The rear end side is arranged at a position close to the outside in the prestress force introduction device arrangement hole.

また、第発明では、第発明または第発明のプレストレス式の接合構造において、プレストレス力導入装置が接合面に交差するように傾斜して配置されて、接合部のせん断抵抗力が高められていることを特徴とする。 Further, in the third invention, in the prestressed joint structure of the first invention or the second invention, the prestress force introducing device is disposed so as to cross the joint surface, and the shear resistance of the joint is increased. It is characterized by being raised.

第1発明によると、アンカー孔が、アンカー孔軸方向に伸びる小径アンカー孔と、前記小径アンカー孔と同心状に大径の環状溝を小径アンカー孔軸方向に間隔をおいて複数設けて構成した大径環状係止溝部とを備えた大径環状係止溝部付アンカ−孔とされ、アンカー孔の全周に連続した大径環状係止溝を備えているので、充填材と大径環状係止溝部界面の付着強度を高めることができ、また、アンカー孔周りの全周に形成した大径環状係止溝による周方向の係止効果に方向性のないため、全周の係止効果を利用してプレストレス力を高めて定着でき、しかも、かつ前記プレストレス力導入装置の先端側の定着部がアンカー孔軸方向の大径環状係止溝部の領域または大径環状係止溝部より奥部の領域に位置するように配置されているため、プレストレス力導入装置の先端側を確実に定着することができ、一本あたりのプレストレス力導入装置のプレストレス力を高めて、全体の使用本数を少なくすることができる。また、大径環状係止溝付アンカー孔の構造も簡単な構造であり、そのため定着構造も簡単な構造とすることができる。   According to the first invention, the anchor hole is configured by providing a plurality of small-diameter anchor holes extending in the anchor hole axial direction and a plurality of large-diameter annular grooves concentrically with the small-diameter anchor holes in the small-diameter anchor hole axial direction. An anchor hole with a large-diameter annular locking groove portion provided with a large-diameter annular locking groove portion, and a large-diameter annular locking groove continuous over the entire circumference of the anchor hole. The adhesion strength at the interface of the stop groove can be increased, and the locking effect in the circumferential direction by the large-diameter annular locking groove formed on the entire circumference around the anchor hole is not directional. The prestressing force introduction device can be used for fixing and the fixing portion on the tip side of the prestressing force introduction device is deeper than the region of the large-diameter annular locking groove in the anchor hole axial direction or the large-diameter annular locking groove. Is located in the area of the The distal end side of the Torres force introduction device can be reliably fixed, by increasing the prestressing force of the prestressing force introduction device per one can reduce the overall use number. Moreover, the structure of the anchor hole with the large-diameter annular locking groove is also a simple structure, so that the fixing structure can be simplified.

参考第1発明によると、アンカー孔が、アンカー孔軸方向に伸びる小径アンカー孔と、前記小径アンカー孔に接続し小径アンカー孔と同心状にかつ小径アンカー孔軸方向の先端側に向かって拡径する截頭円錐状溝とを備えた截頭円錐状溝付アンカ−孔とされているので、充填材と截頭円錐状溝部界面の付着強度を高めることができ、また、アンカー孔周りの全周に形成した拡径する截頭円錐状溝による周方向の係止効果に方向性のないため、全周の係止効果を利用してプレストレス力を高めて定着でき、しかも、かつ前記プレストレス力導入装置の先端側の定着部がアンカー孔軸方向の拡径する截頭円錐状溝の領域または截頭円錐状溝より奥部の領域に位置するように配置されているため、プレストレス力導入装置の先端側を確実に定着することができ、一本あたりのプレストレス力導入装置のプレストレス力を高めて、全体の使用本数を少なくすることができる。また、截頭円錐状溝付アンカー孔の構造も簡単であるため、定着構造も簡単な構造とすることができる。 According to the first reference invention , the anchor hole has a small-diameter anchor hole extending in the axial direction of the anchor hole, and is connected to the small-diameter anchor hole and concentrically with the small-diameter anchor hole, and the diameter increases toward the distal end side in the small-diameter anchor hole axial direction. The frusto-conical grooved anchor hole is provided with a frusto-conical groove to increase the adhesion strength between the filler and the frusto-conical groove part interface, Since there is no directionality in the circumferential locking effect due to the frusto-conical groove formed on the circumference, the prestressing force can be increased and fixed using the locking effect on the entire circumference, and the pre- Since the fixing part on the distal end side of the stress force introducing device is disposed so as to be located in the frustoconical groove area where the diameter increases in the anchor hole axial direction or in the deeper area than the frustoconical groove, prestress Securely fix the tip of the force introduction device Bets can be, increase the prestressing force of the prestressing force introduction device per one can reduce the overall use number. Further, since the structure of the truncated conical grooved anchor hole is simple, the fixing structure can also be made simple.

発明によると、一方のコンクリート部材またはコンクリート構造物のアンカー孔を大径環状係止溝部付アンカ−孔としているので、充填材と大径環状係止溝部界面の付着強度を高めることができ、かつ前記プレストレス力導入装置の先端側の定着部が大径環状係止溝部の領域または大径環状係止溝部より奥部の領域に位置するように配置するだけで、プレストレス力導入装置を使用したプレストレス式の強固な接合構造とすることができる。また、前記と同様に一本あたりのプレストレス力導入装置のプレストレス力を高めて、全体の使用本数を少なくすることができる。 According to the second invention, since the anchor hole of one concrete member or concrete structure is an anchor hole with a large-diameter annular locking groove, the adhesion strength between the filler and the large-diameter annular locking groove can be increased. In addition, the prestress force introducing device can be simply disposed so that the fixing portion on the front end side of the prestress force introducing device is located in the region of the large-diameter annular locking groove portion or in the region deeper than the large-diameter annular locking groove portion. It is possible to obtain a prestressed strong joint structure using Moreover, the prestress force of the prestress force introduction | transduction apparatus per one can be raised similarly to the above, and the whole number of use can be decreased.

参考第2発明によると、一方のコンクリート部材またはコンクリート構造物のアンカー孔を截頭円錐状溝付アンカ−孔としているので、充填材と截頭円錐状溝部界面の付着強度を高めることができ、かつ前記プレストレス力導入装置の先端側の定着部が截頭円錐状溝の領域または截頭円錐状溝より奥部の領域に位置するように配置するだけで、プレストレス力導入装置を使用したプレストレス式の強固な接合構造とすることができる。また、前記と同様に一本あたりのプレストレス力導入装置のプレストレス力を高めて、全体の使用本数を少なくすることができる。

発明によると、単にプレストレス力導入装置を接合面に交差するように傾斜して配置して緊張定着するだけで、一方のコンクリート部材またはコンクリート構造物と、他方の部材との接合部境界面方向におけるせん断抵抗力を高めることができる。
According to a reference second invention, frustoconical groove anchor hole of one of the concrete member or concrete structure Tsukea Lanka - since the hole, it is possible to improve the adhesion strength of the filler and the frustoconical groove surface In addition, the prestress force introduction device can be used simply by arranging the fixing portion on the tip side of the prestress force introduction device so as to be located in the region of the frustoconical groove or the region deeper than the frustoconical groove. Thus, a prestressed strong joint structure can be obtained. Moreover, the prestress force of the prestress force introduction | transduction apparatus per one can be heightened similarly to the above, and the whole number of use can be decreased.

According to the third aspect of the present invention, the boundary between the one concrete member or the concrete structure and the other member is simply arranged by tilting the prestress force introduction device so as to cross the joint surface and fixing the tension. The shear resistance in the surface direction can be increased.

先ず、図2を参照しながら、コンクリート部材またはコンクリート構造物等の一方のコンクリート部材1に設けるアンカー孔4の特徴について説明すると、図2(a)に示すように、ドリルなどの切削加工によりコンクリート部に設けられた一定径の小径アンカー孔4に、図示省略の駆動装置により回転駆動される駆動軸10の中間部に設けた円盤状のガイドプレート11をアンカー孔4の基端側に配置してこれを支点とすると共に駆動軸10の先端部の円板状部12にビット13を円板周方向に間隔をおいて備えている拡径溝形成装置14の駆動軸先端部を前記アンカー孔4に挿入し、前記駆動軸10を回転駆動させると共にガイドプレート11を小径アンカー孔4の内周面に当接してこれを支点として、図2(b)に示すように、駆動軸先端側のヘッド15を振り回すように揺動させ、またアンカー孔4の軸方向に位置をずらして同様にヘッド15を振り回すように揺動させることにより、図1(a)に示すように、小径アンカー孔4の内周面を周方向に均一に切削して、小径アンカー孔4と同心状に大径の環状溝16を小径アンカー孔軸方向に間隔をおいて複数設けた大径環状係止溝部16aを備えた大径環状係止溝部付アンカ−孔4aを形成した構造とすることができる。   First, the characteristics of the anchor hole 4 provided in one concrete member 1 such as a concrete member or a concrete structure will be described with reference to FIG. 2. As shown in FIG. A disc-shaped guide plate 11 provided at an intermediate portion of the drive shaft 10 rotated by a drive device (not shown) is arranged on the proximal end side of the anchor hole 4 in a small-diameter anchor hole 4 having a constant diameter provided in the portion. The tip of the drive shaft of the diameter-growing groove forming device 14 is provided with the bit 13 on the disc-like portion 12 at the tip of the drive shaft 10 at intervals in the circumferential direction of the disc. 2, the drive shaft 10 is driven to rotate, and the guide plate 11 is brought into contact with the inner peripheral surface of the small-diameter anchor hole 4, and this is used as a fulcrum, as shown in FIG. As shown in FIG. 1 (a), the head 15 on the end side is swung so as to be swung, and the position of the anchor hole 4 is shifted in the axial direction so that the head 15 is swung similarly. A large-diameter annular lock in which the inner circumferential surface of the anchor hole 4 is uniformly cut in the circumferential direction, and a plurality of large-diameter annular grooves 16 are provided concentrically with the small-diameter anchor hole 4 at intervals in the small-diameter anchor hole axial direction. It can be set as the structure which formed the anchor hole 4a with a large diameter annular locking groove part provided with the groove part 16a.

このように構成された大径環状係止溝部付アンカー孔4aに、図1(a)および(b)に示す実施形態のプレストレス式の接合構造では、プレストレス力導入装置8を、緊張されるPC鋼棒38とその両端部の雄ねじ軸部にねじ込まれるナット39およびその内側に配置される支圧プレート39aを有する支圧部39bを備えている形態のプレストレス力導入装置8され、そのプレストレス力導入装置8における先端側のナット39を有する支圧部39bを定着すべく、この先端側の定着部39bが大径環状係止溝部付アンカー孔4aにおける大径環状係止溝部16の領域または大径環状係止溝部16より奥部の領域に位置するように配置され、プレストレス力導入装置8の後端側(アンカー孔の開放端部側)が他方のコンクリート部材5a(5b)におけるプレストレス力導入装置8挿入孔内における外部に近い位置に収納配置されている。(図1aの状態)   In the prestressed joint structure of the embodiment shown in FIGS. 1A and 1B, the prestress force introduction device 8 is tensioned to the anchor hole 4a with the large-diameter annular locking groove portion configured as described above. A prestressing force introduction device 8 having a support portion 39b having a PC steel rod 38 and nuts 39 to be screwed into male screw shafts at both ends thereof and a support plate 39a disposed on the inside thereof. In order to fix the pressure bearing portion 39b having the nut 39 on the distal end side in the prestress force introduction device 8, the fixing portion 39b on the distal end side is connected to the large diameter annular locking groove portion 16 in the anchor hole 4a with the large diameter annular locking groove portion. It arrange | positions so that it may be located in the area | region or the area | region behind the large diameter annular locking groove part 16, and the rear end side (opening edge part side of an anchor hole) of the prestress force introduction apparatus 8 is the other concrete member 5a. It is housed disposed closer to the outside in the prestressing force introduction device 8 insertion hole in 5b). (State of FIG. 1a)

次いで、図1(b)に示すように、プレストレス力導入装置8を埋め込むように、大径環状係止溝付アンカー孔4aと、他方のコンクリート部材5a(5b)における貫通孔3からなるプレストレス力導入装置配置用孔3とに渡って、プレストレス力導入装置8における他方の支圧部39bを露出させるように無収縮モルタル等の充填材17を充填すると共に一方のコンクリート部材1と他方のコンクリート部材5a(5b)との間の目地部に無収縮モルタル等の充填材17を充填する。前記の充填材17が大径環状係止溝16に充分充填されるように加圧して充填する。   Next, as shown in FIG. 1 (b), a pre-stress comprising an anchor hole 4a with a large-diameter annular locking groove and a through hole 3 in the other concrete member 5a (5b) so as to embed the pre-stress force introduction device 8 is embedded. The concrete material 1 and the other concrete member 1 are filled with the filling material 17 such as a non-shrink mortar so as to expose the other pressure bearing part 39b of the prestress force introduction device 8 over the stress force introduction device arrangement hole 3. Filling material 17 such as non-shrink mortar is filled in the joint between the concrete member 5a (5b). The filler 17 is pressurized and filled so that the large-diameter annular locking groove 16 is sufficiently filled.

前記充填材17が硬化して所定の強度に達した後、他方のナット39を締め込んで、プレストレスを導入する。この時、プレストレス力導入装置8の先端側の支圧部39bは、前記一方のコンクリート部材1における大径環状係止溝部16aの領域またはこれより奥部に位置しているので、支圧部39bから充填材17へ、充填材17と大径環状係止溝部16aとの付着係止力を介して前記一方のコンクリート部材1に確実に伝達することができばかりでなく、充填材17から小径アンカー孔4内周面の付着力を介して確実に伝達することができるため、図8に示すような小径アンカー孔4のみからなる形態の接合構造より、さらに接合力を高めることができる。   After the filler 17 is cured and reaches a predetermined strength, the other nut 39 is tightened to introduce prestress. At this time, the pressure bearing part 39b on the front end side of the prestress force introducing device 8 is located in the region of the large-diameter annular locking groove 16a in the one concrete member 1 or in the back thereof, so that the pressure bearing part 39b can be reliably transmitted from the filler 17 to the filler 17 through the adhesion locking force between the filler 17 and the large-diameter annular locking groove 16a. Since it can transmit reliably via the adhesive force of the inner peripheral surface of the anchor hole 4, it is possible to further increase the joining force as compared with the joining structure having only the small-diameter anchor hole 4 as shown in FIG.

前記のように大径環状係止溝付アンカー孔4aばかりでなく、図4に示すような小径アンカー孔4の先端部または中間部に截頭円錐状溝4bを有する截頭円錐状溝付アンカー孔4cを予め設けてこれに適用するようにしてもよい。(なお、図4に示すプレストレス力導入装置8については後記する。)   In addition to the anchor hole 4a with a large-diameter annular locking groove as described above, a frustoconical grooved anchor having a frustoconical groove 4b at the tip or middle of the small-diameter anchor hole 4 as shown in FIG. The hole 4c may be provided in advance and applied thereto. (The prestressing force introduction device 8 shown in FIG. 4 will be described later.)

前記のような截頭円錐状溝4b付のアンカー孔4cを設ける場合の装置としては、図示を省略するが、外面がテーパー状(截頭円錐状)のコーンの外周面に軸方向に延長する傾斜した溝を備えていると共にその傾斜した溝に沿って摺動移動可能なビット付アームを別個の駆動軸部側に横軸により支持するように備えている切削式拡径装置を使用し、小径アンカー孔内にコーンおよびビット付アームを配置し、コーンおよびビット付アームを回転させながらビット付アームをコーンの拡径側に押し出すように前記の傾斜した溝に沿って移動させると、截頭円錐状に拡径した截頭円錐状溝4bを形成することができる。   As an apparatus for providing the anchor hole 4c with the frustoconical groove 4b as described above, the outer surface extends in the axial direction to the outer peripheral surface of the cone having a tapered shape (the frustoconical shape). Using a cutting-type diameter expanding device provided with an inclined groove and an arm with a bit slidably movable along the inclined groove so as to be supported on a separate drive shaft side by a horizontal axis, When an arm with a cone and a bit is arranged in a small-diameter anchor hole, and the arm with a bit is moved along the inclined groove so as to push out toward the diameter expansion side of the cone while rotating the cone and the arm with the bit, A frustoconical groove 4b having a conical diameter can be formed.

次に、本発明の他の実施形態において使用する反力PC鋼材によるプレストレス力導入装置8の構造について、図5以降を参照して説明する。   Next, the structure of the prestressing force introducing device 8 using the reaction force PC steel used in another embodiment of the present invention will be described with reference to FIG.

図5(a)は、本発明において使用する一実施形態の中空PC鋼棒を使用したコンクリート用のプレストレス力導入装置8の1ユニットの一部切欠側面図を示し、(b)はその縦断側面図を示すものであって、鋼製中空PC鋼棒本体6aの長手方向の一端部(前端部)外側に雄ねじ部20を有すると共に、他端部(後端部)外側に雄ねじ部21を有する中空PC鋼棒6における前記雄ねじ部21に、前後両端部に雌ねじ孔22、23を有すると共に多角形の回動工具係合用外面24を有する支承筒25における前端部の雌ねじ孔22が螺合連結されている。   Fig.5 (a) shows the partially cutaway side view of 1 unit of the prestressing force introduction apparatus 8 for concrete using the hollow PC steel rod of one Embodiment used in this invention, (b) is the longitudinal section A side view is shown, Comprising: It has the external thread part 20 on the outer side of the longitudinal direction one end part (front end part) of the steel hollow PC steel rod main body 6a, and the external thread part 21 on the other end part (rear end part) outer side. A female screw hole 22 at the front end of a support cylinder 25 having female screw holes 22 and 23 at both front and rear end portions and a polygonal rotating tool engaging outer surface 24 is screwed into the male screw portion 21 of the hollow PC steel rod 6. It is connected.

前記支承筒25の後端部の雌ねじ孔23に、鋼製筒状の環状係止片からなるストッパー26の前部雄ねじ部27が螺合され、前記ストッパー26の後端部外側には、回動工具係合用外面28が形成され、前記ストッパー26の前端部には、前記支承筒25の内部に配置され、前端部に凹部29を有する押圧係止片30の後端面が係合され、前記押圧係止片30の前端部の凹部29には、中空PC鋼棒6内に他端側を除くほぼ全体が挿入され、かつ他端側が前記中空PC鋼棒6の他端部から突出するように配置されたノンプル用反力PC鋼棒7aの後端部が嵌合されている。なお、前記のノンプルとは、引き抜かない方式で、換言すると据え置き方式の意味である。   A front male screw portion 27 of a stopper 26 made of a steel cylindrical annular locking piece is screwed into the female screw hole 23 at the rear end portion of the support tube 25, and the outer end of the stopper 26 is connected to the outer side of the stopper 26. An outer surface 28 for engaging a moving tool is formed, and a front end portion of the stopper 26 is disposed inside the support tube 25, and a rear end surface of a press locking piece 30 having a recess 29 in the front end portion is engaged, The recess 29 at the front end portion of the press locking piece 30 is inserted into the hollow PC steel rod 6 except for the other end side, and the other end side protrudes from the other end portion of the hollow PC steel rod 6. The rear end portion of the non-pulling reaction force PC steel rod 7a disposed in the is fitted. Note that the non-pull means a system that does not pull out, in other words, a stationary system.

この形態においては、1本もののノンプル用反力PC鋼棒7aにより押込み鋼棒を構成しているが、他端側に短尺の撤去用反力PC鋼棒と前記ノンプル用反力PC鋼棒7aよりも若干短尺なノンプル用反力PC鋼棒との2本により押し込み用反力PC鋼棒7を構成することも可能である。前記中空PC鋼棒6の前端部外側の雄ねじ20に、雌ねじ部31を有するナットからなるアンカー材32が着脱自在に螺合固定され、前記ノンプル用反力PC鋼棒7aの先端部は前記雌ねじ部31に連結されている。前記アンカー材32には雄ねじ部材41が螺合固定され、前記雄ねじ部材41により反力PC鋼棒7の先端部が支承されている。   In this embodiment, a push-in steel bar is constituted by a single non-pull reaction force PC steel bar 7a, but a short removal reaction PC steel bar and the non-pull reaction force PC steel bar 7a on the other end side. It is also possible to construct the pushing reaction force PC steel rod 7 by using two of the slightly pulling non-pulling reaction force PC steel rods. An anchor member 32 made of a nut having a female screw portion 31 is detachably fixed to the male screw 20 outside the front end portion of the hollow PC steel rod 6, and the tip portion of the non-pull reaction force PC steel rod 7a is the female screw. It is connected to the part 31. A male screw member 41 is screwed and fixed to the anchor member 32, and the distal end portion of the reaction force PC steel rod 7 is supported by the male screw member 41.

図5に示す状態は、図7に示すような状態にプレストレス力導入装置8を、前部フレーム43および後部フレーム44を複数の連結ロッド45で平行に結合し、後部フレーム44側に油圧ジャッキ34を備えた枠形フレーム33に配置して、液圧ジャッキ34を利用して、その可動ピストン35の先端部に係合され、ストッパー26の中央中空部に挿入される押し込み鋼棒36により押圧係止片30を前記中空PC鋼棒6に向かって移動するように押圧し、前記ノンプル(据置)用反力PC鋼棒7aを中空PC鋼棒6内に押し込むように圧縮力を導入した後、その状態においてフリーになっている前記支承筒25またはストッパー26を前記押圧係止片30に向かって接近する方向(図5の右方向)に回転させて、前記ストッパー26を前進移動して、ストッパー26の前端部を押し込み係止片30に係合させ、枠形フレーム33から分離させた状態を示した図である。このようなプレストレス力導入装置8は特開2001−207590号公報等により公知であり各種の形態の装置を使用することもできる。   In the state shown in FIG. 5, the prestress force introducing device 8 is connected to the state shown in FIG. 7, the front frame 43 and the rear frame 44 are connected in parallel by a plurality of connecting rods 45, and a hydraulic jack is connected to the rear frame 44 side. It is placed on a frame-shaped frame 33 provided with 34 and is pressed by a push-in steel rod 36 which is engaged with the distal end portion of the movable piston 35 and inserted into the central hollow portion of the stopper 26 using a hydraulic jack 34. After pressing the locking piece 30 so as to move toward the hollow PC steel rod 6 and introducing a compressive force so as to push the non-pull (stationary) reaction force PC steel rod 7a into the hollow PC steel rod 6. Then, the support cylinder 25 or the stopper 26 which is free in that state is rotated in a direction approaching the pressing locking piece 30 (right direction in FIG. 5), and the stopper 26 is advanced. And moving, is engaged with the push locking piece 30 to the front end of the stopper 26 is a diagram showing a state of being separated from the frame-shaped frame 33. Such a prestress force introduction device 8 is known from Japanese Patent Application Laid-Open No. 2001-207590, and various types of devices can be used.

次に、一方のコンクリート部材5aと他方の部材5bおよび前記のプレストレス力導入装置8を使用して、本発明のプレストレス式の接合構造の他の形態について、図3〜図4を参照して説明する。   Next, referring to FIG. 3 to FIG. 4 for other forms of the prestressed joint structure of the present invention using the one concrete member 5a and the other member 5b and the prestress force introduction device 8 described above. I will explain.

図3(a)に示す状態は、図1に示す形態の一方のコンクリート部材1の大径環状係止溝付アンカー孔4aおよび他方の部材5a(5b)のプレストレス力導入装置配置用孔4dにわたって図5に示す形態のプレストレス力導入装置8を配置した状態で、プレストレス力導入装置8における先端側のナットからなるアンカー材(支圧部)32を定着すべく、この先端側のアンカー材(定着部)32が大径環状係止溝部付アンカー孔4aにおける大径環状係止溝部16aの領域または大径環状係止溝部16aより奥部の領域に位置するように配置され、プレストレス力導入装置8の後端側が他方のコンクリート部材5a(5b)におけるプレストレス力導入装置配置用孔(挿入孔)4d内における外部に近い位置に収納配置されている。   The state shown in FIG. 3 (a) is the anchor hole 4a with a large-diameter annular locking groove in one concrete member 1 in the form shown in FIG. 1 and the prestress force introduction device arranging hole 4d in the other member 5a (5b). 5 in a state where the prestress force introduction device 8 having the form shown in FIG. 5 is arranged, the anchor on the tip side is fixed in order to fix the anchor material (supporting portion) 32 made of a nut on the tip side of the prestress force introduction device 8. The material (fixing portion) 32 is disposed so as to be positioned in the region of the large-diameter annular locking groove 16a in the anchor hole 4a with the large-diameter annular locking groove or in the region deeper than the large-diameter annular locking groove 16a. The rear end side of the force introducing device 8 is housed and disposed at a position near the outside in the prestress force introducing device arranging hole (insertion hole) 4d in the other concrete member 5a (5b).

次いで、図3(b)に示すように、プレストレス力導入装置8を埋め込むように、大径環状係止溝付アンカー孔4aと、他方のコンクリート部材5a(5b)におけるプレストレス力導入装置配置用孔4dとに渡って、プレストレス力導入装置8における他方のアンカー材(支圧部)37を埋め込むように無収縮モルタル等の充填材17を充填すると共に一方のコンクリート部材5aと他方のコンクリート部材5a(5b)との間の目地部に無収縮モルタル等の充填材17を充填する。前記の充填材17が大径環状係止溝16aに充分充填されるように加圧して充填する。   Next, as shown in FIG. 3B, the prestress force introducing device arrangement in the large-diameter annular locking groove anchor hole 4a and the other concrete member 5a (5b) so as to embed the prestress force introducing device 8 is embedded. The filler 17 such as a non-shrink mortar is filled so as to embed the other anchor material (pressure bearing portion) 37 in the prestress force introduction device 8 across the hole 4d, and one concrete member 5a and the other concrete are filled. A filler 17 such as a non-shrink mortar is filled in the joint between the members 5a (5b). The filling material 17 is pressurized and filled so that the large-diameter annular locking groove 16a is sufficiently filled.

前記の大径環状係止溝付アンカー孔4aとプレストレス力導入装置配置用孔4dの直径寸法はプレストレス力導入装置8の外径寸法よりも大きく設定され、プレストレス力導入装置8の奥部にグラウト17を充填可能なようにされ、また、前記プレストレス力導入装置8のストッパ26が、他方のコンクリート部材5aの外部から操作可能な位置に配置される。そのため前記プレストレス力導入装置8の長さは適宜設定される。   The diameter size of the anchor hole 4a with the large-diameter annular locking groove and the prestress force introduction device placement hole 4d is set larger than the outer diameter size of the prestress force introduction device 8, and the depth of the prestress force introduction device 8 is increased. The grout 17 can be filled in the portion, and the stopper 26 of the prestressing force introducing device 8 is disposed at a position where it can be operated from the outside of the other concrete member 5a. Therefore, the length of the prestress force introduction device 8 is set as appropriate.

なお、一方のコンクリート部材1に対して他方の各コンクリート部材5a(5b)は、目地間隔をおいて近接して対向するように図示省略の支保工等により適宜支持されて配置される。   In addition, each concrete member 5a (5b) of the other side with respect to one concrete member 1 is suitably supported and arrange | positioned by the support work etc. which are not illustrated so that it may oppose and adjoin with a joint interval.

前記グラウト17が所定の強度を発揮した後、プレストレス力導入装置8におけるストッパ26を電動式レンチ等の回動工具により後退するように回転させることにより、反力PC鋼棒7の圧縮力が開放され、反対に、中空PC鋼棒6とグラウト17との付着およびグラウト17と一方のコンクリート部材1および他方のコンクリート部材5a(5b)の付着によって、中空PC鋼棒6の短縮が阻まれ、これにより相対的に一方のコンクリート部材1および他方の部材5aが接近する方向に圧縮のプレストレスが導入され、一方のコンクリート部材1と他方のコンクリート部材5aとが強固に接合され一体化される。中空PC鋼棒6とグラウト17との付着が十分であれば、アンカー材32とアンカー部材37は原理的には省略することもできる。なお、前記のストッパ26および支承筒25は取り外し、反力PC鋼棒7は取り外すことも可能であるが、反力PC鋼棒7を残地させるノンプル用反力PC鋼棒7とすることも可能である。   After the grout 17 exhibits a predetermined strength, the compression force of the reaction force PC steel rod 7 is increased by rotating the stopper 26 in the prestress force introduction device 8 so as to be retracted by a rotating tool such as an electric wrench. On the contrary, the adhesion of the hollow PC steel rod 6 and the grout 17 and the adhesion of the grout 17 to one concrete member 1 and the other concrete member 5a (5b) prevent the hollow PC steel rod 6 from being shortened, As a result, compression prestress is introduced in the direction in which the one concrete member 1 and the other member 5a approach relatively, and the one concrete member 1 and the other concrete member 5a are firmly joined and integrated. If the adhesion between the hollow PC steel rod 6 and the grout 17 is sufficient, the anchor material 32 and the anchor member 37 can be omitted in principle. The stopper 26 and the support tube 25 can be removed and the reaction force PC steel rod 7 can be removed. However, the reaction force PC steel rod 7 can be left as a non-pull reaction force PC steel rod 7. Is possible.

反力PC鋼棒7を残地させる場合、前記支承筒25を中空PC鋼棒6から取り外し、グラウト17の硬化した後に硬化し、中空PC鋼棒6とノンプル用反力PC鋼棒7の一体性を高め、接合された他方のコンクリート部材5aの終局耐力を向上させるため、適宜遅延剤を硬化型接着剤に混合させてなる経時硬化型の合成樹脂製接着剤からなる接着兼用防錆材が中空PC鋼棒6の端部開口部から予めあるいは適宜の時期に注入充填される。   When the reaction force PC steel rod 7 is left behind, the bearing tube 25 is removed from the hollow PC steel rod 6 and hardened after the grout 17 is hardened, so that the hollow PC steel rod 6 and the non-pulling reaction force PC steel rod 7 are integrated. In order to improve the ultimate strength of the joined other concrete member 5a, an adhesive and rust preventive material composed of a time-curing type synthetic resin adhesive in which a retarder is mixed with a curable adhesive appropriately. It is injected and filled in advance or at an appropriate time from the end opening of the hollow PC steel rod 6.

その後、前記支承筒25を取り外した後、ノンプル用反力PC鋼棒7を回収することなく、前記中空PC鋼棒6内に据え置き、防錆を兼ねる経時硬化製樹脂等の接着兼用防錆材40の硬化により中空PC鋼棒6とノンプル用PC鋼棒7の一体化を図る。その後、プレストレス力導入装置配置用孔4dの端部に跡埋めモルタル59を充填し中空PC鋼棒6および反力PC鋼棒7の防錆を図る。   Thereafter, after removing the support tube 25, the anti-pulling reaction force PC steel rod 7 is not collected, but is left in the hollow PC steel rod 6 and is used as an anticorrosive material such as a time-curing resin that also serves as rust prevention. Integration of the hollow PC steel rod 6 and the non-pull PC steel rod 7 is achieved by curing 40. Thereafter, the end portion of the prestress force introduction device disposing hole 4d is filled with a burying mortar 59 to prevent the hollow PC steel rod 6 and the reaction force PC steel rod 7 from being rusted.

図4(a)(b)に示す形態は、截頭円錐状の溝とした形態であり、その他の形態は前記実施形態と同様であるので、同様な要素には同様な符号を付して説明を省略する。   The form shown in FIGS. 4 (a) and 4 (b) is a frustoconical groove, and the other forms are the same as those in the previous embodiment. Description is omitted.

なお、本発明において使用するプレストレス力導入装置8の変形形態として、図6に示すような形態でもよい。この形態は、ノンプル方式で使用される押込み用反力PC鋼棒7を中空PC鋼棒6よりも突出する長さにしておき、かつ前記押込み用反力PC鋼棒6両端部を予めねじ切り加工して、先端部に雄ねじ部46および後端部に雄ねじ部47を形成し、また先端部をアンカー材32に螺合固定し、既設コンクリート構造物等の一方のコンクリート部材1および他方の部材5a(5b)への無収縮モルタル等のグラウト17を介してプレストレス導入後、後端側の突出した部分を利用して、中空PC鋼棒6の外径よりも大きい内径の透孔を有するアンカープレート49を中空PC鋼棒6に嵌設すると共に無収縮モルタル等のグラウト17の端部支承部に当接させ、ワッシャー50、反力PC鋼棒定着用ナット51を取付けている。   As a modified form of the prestress force introduction device 8 used in the present invention, a form as shown in FIG. 6 may be used. In this embodiment, the pushing reaction force PC steel rod 7 used in the non-pull method is set to a length projecting from the hollow PC steel rod 6, and both ends of the pushing reaction force PC steel rod 6 are previously threaded. Then, the male screw portion 46 is formed at the front end portion and the male screw portion 47 is formed at the rear end portion, and the front end portion is screwed and fixed to the anchor member 32, so that one concrete member 1 and the other member 5a such as an existing concrete structure are formed. An anchor having a through-hole having an inner diameter larger than the outer diameter of the hollow PC steel rod 6 by using a protruding portion on the rear end side after introducing prestress through a grout 17 such as a non-shrink mortar into (5b) The plate 49 is fitted to the hollow PC steel bar 6 and is brought into contact with the end support portion of the grout 17 such as a non-shrink mortar, and a washer 50 and a reaction force PC steel bar fixing nut 51 are attached.

その後、図6(a)に示すように、押し込み用反力PC鋼棒7の後端部雄ねじ部47にカップラー52を介して引張用螺杆53を直列に連結し、脚部55を有し周側面部が一部開放されている間隔保持部材54を前記引張用螺杆53に嵌設すると共に、脚部55をアンカープレート49に取付け、前記引張用螺杆53にセンターホールジャッキ56を嵌設し、前記引張用螺杆53の後端部にナット57を螺合させると共に、可動ピストン58に係合させる。   Thereafter, as shown in FIG. 6 (a), a tension screw 53 is connected in series to the rear end male threaded portion 47 of the pushing reaction force PC steel rod 7 via a coupler 52, and has a leg portion 55. A spacing member 54 having a partially opened side surface is fitted to the tension screw 53, a leg 55 is attached to the anchor plate 49, and a center hole jack 56 is fitted to the tension screw 53. A nut 57 is screwed into the rear end portion of the pulling screw 53 and engaged with the movable piston 58.

この状態でセンターホールジャッキ56を伸長させて、引張用螺杆53を介して押し込み用反力PC鋼棒7を図6の左方向に引張すると、反力PC鋼棒定着用ナット51がアンカープレート49から離れるので、前記反力PC鋼棒定着用ナット51をアンカープレート49に接近する方向に回転させて、アンカープレート49に締め付けることにより、押込み用反力PC鋼棒7を緊張できる構造としたものである。なお、押込み用反力PC鋼棒7を緊張した後は、センターホールジャッキ56を開放して、ナット57,引張用螺杆53,間隔保持部材54,カップラー52を撤去し、跡埋めモルタル59をアンカー孔4dの端部に充填する(図6bの状態)。前記実施形態の場合もこのような構造に変更することができる。   When the center hole jack 56 is extended in this state and the pushing reaction force PC steel rod 7 is pulled in the left direction of FIG. 6 via the tensioning screw 53, the reaction force PC steel rod fixing nut 51 is fixed to the anchor plate 49. The reaction force PC steel rod fixing nut 51 is rotated in the direction approaching the anchor plate 49 and tightened to the anchor plate 49 so that the pushing reaction force PC steel rod 7 can be tensioned. It is. After tensioning the pushing reaction force PC steel rod 7, the center hole jack 56 is opened, and the nut 57, the tension screw 53, the spacing member 54, and the coupler 52 are removed, and the burying mortar 59 is anchored. The end of the hole 4d is filled (state shown in FIG. 6b). In the case of the said embodiment, it can change to such a structure.

その他の構成および操作施工手順については、前記実施形態で説明したプレストレス力導入装置と同様であるので、同様な部分については同様な符号を付して説明を省略する。   Other configurations and operation construction procedures are the same as those of the prestressing force introduction apparatus described in the above embodiment, and thus similar parts are denoted by the same reference numerals and description thereof is omitted.

本願を実施する場合、前記他方の部材5a(5b)としては、コンクリート部材、プレキャスト部材、現場打ちコンクリート部材、前記一方のコンクリート部材5aとは異なる構造部材、前記一方のコンクリート部材5aと同じ構造部材あるいはその他の部材でもよい。 When carrying out the present application , the other member 5a (5b) includes a concrete member, a precast member, a cast-in-place concrete member, a structural member different from the one concrete member 5a, and the same structural member as the one concrete member 5a. Alternatively, other members may be used.

また、本願を実施する場合、他方の部材側のプレストレス力導入装置配置用孔(アンカー孔)4dに大径環状係止溝16aあるいは截頭円錐状の溝4bを設ける構造としてもよく、このような構造にすると、より強固なプレストレス式の接合構造とすることができる。截頭円錐状の溝4bとする場合には、一方のコンクリート部材1に設ける截頭円錐状の溝4bと孔軸方向に対称に設けるとよい。 Moreover, when implementing this application , it is good also as a structure which provides the large diameter cyclic | annular latching groove | channel 16a or the frustoconical groove | channel 4b in the prestressing force introduction apparatus arrangement | positioning hole (anchor hole) 4d of the other member side, With such a structure, a stronger prestressed joint structure can be obtained. In the case of the frustoconical groove 4b, the frustoconical groove 4b provided in one concrete member 1 may be provided symmetrically with the hole axis direction.

また、本願のプレストレス式の接合構造を適用する場合、図示を省略するが、一方のコンクリート部材が貫通したアンカー孔を備えたコンクリート部材あるいは他方の部材が貫通したプレストレス力導入装置配置用孔を備えた部材に適用するようにしてもよい。 In addition, when applying the prestressed joint structure of the present application , although not shown, a concrete member provided with an anchor hole through which one concrete member penetrates or a prestress force introduction device placement hole through which the other member penetrates You may make it apply to the member provided with.

また、本願を実施する場合、大径環状係止溝16aあるいは截頭円錐状の溝4bに対して、アンカー材32とアンカー材37を截頭円錐状のテーパー状外面を有する部材とし、アンカー材32の小径側外面とアンカー材37の小径側外面とが互いに接近すると共に大径側外面が離反するような配置形態としてもよい。 When the present application is carried out, the anchor material 32 and the anchor material 37 are members having a frustoconical tapered outer surface with respect to the large-diameter annular locking groove 16a or the frustoconical groove 4b. It is good also as an arrangement | positioning form that the small diameter side outer surface of 32 and the small diameter side outer surface of the anchor material 37 approach mutually, and a large diameter side outer surface separates.

図10は本発明の実施形態を示し、コンクリート構造物相互を一体に接合する場合に、プレストレス力導入装置8が接合境界面に傾斜して交差するように配置されて、接合部のせん断抵抗力が高めるようにした本発明の他の実施形態を示すものであって、この形態ではコンクリート製橋脚60側の片持ち式支持部61とコンクリート製桁62とを一体化するために、これらの間に必要に応じ配筋して支承装置63を埋め込むようにコンクリートまたはモルタルからなる充填材64を充填して一体化した形態であり、このような場合に橋軸方向等の横方向のせん断抵抗を高めるために、前記片持ち式支持部61と充填材64とコンクリート製桁62とにわたって橋軸方向に傾斜した長孔のアンカー孔4を設け、前記アンカー孔4内に図5に示すようなプレストレス力導入装置8を配置すると共にアンカー孔4内面とストレス力導入装置8との間にモルタル等の充填材17を充填・硬化し、プレストレス力導入装置8における中空PC鋼棒6を緊張定着させて、地震時等において、桁62と片持ち式支持部61とが橋軸方向等に離反するのを防止するためにプレストレス力導入装置8を横方向のせん断抵抗を高める部材として機能させた形態である。   FIG. 10 shows an embodiment of the present invention, and when the concrete structures are joined together, the prestress force introduction device 8 is disposed so as to cross the joining boundary surface at an angle, and the shear resistance of the joining portion is shown. Another embodiment of the present invention in which the force is increased is shown, and in this embodiment, in order to integrate the cantilevered support portion 61 and the concrete girder 62 on the concrete pier 60 side, It is a form in which a filler 64 made of concrete or mortar is filled and integrated so as to embed the support device 63 by arranging the bars in between, and in such a case, the shear resistance in the transverse direction such as the bridge axis direction In order to increase the height, a long anchor hole 4 inclined in the bridge axis direction is provided across the cantilever support 61, the filler 64 and the concrete girder 62, and the anchor hole 4 is shown in FIG. The pre-stress force introduction device 8 is disposed, and a filler 17 such as mortar is filled and hardened between the inner surface of the anchor hole 4 and the stress force introduction device 8, and the hollow PC steel rod 6 in the pre-stress force introduction device 8 is fixed. As a member to increase the shear resistance in the lateral direction, to fix the tension and prevent the girder 62 and the cantilever support 61 from separating in the bridge axis direction or the like during an earthquake or the like. It is a functioned form.

片持ち式支持部61のアンカー孔4奥部に大径環状係止溝部16(図示の場合)あるいは截頭円錐状溝4bを設ける点は前記の各形態の場合と同様であり、同様な要素については、同様な符号を付して説明を省略する。 The point that the large-diameter annular locking groove 16 (in the case of illustration) or the frustoconical groove 4b is provided in the deep part of the anchor hole 4 of the cantilevered support 61 is the same as in each of the above-described embodiments. About these, the same code | symbol is attached | subjected and description is abbreviate | omitted.

また、図11に示すように、コンクリート部材またはコンクリート構造物1(例えば桁62)においては、点線で示すPC鋼材65が下に凸の曲線状配置とされて中立軸より上側で緊張定着されることによる曲げモーメントにより、桁端部下側では引張りが作用する場合がある。このようにコンクリート部材あるいは構造物1における引張り領域が生じる場合に、この部分のコンクリートの厚さ方向にプレストレスを付加することにより、コンクリート部材あるいは構造物1を補強するようにしてもよい。   Further, as shown in FIG. 11, in the concrete member or the concrete structure 1 (for example, the girder 62), the PC steel members 65 indicated by the dotted lines are arranged in a downwardly curving shape and are tension-fixed above the neutral axis. Depending on the bending moment, tension may act below the end of the girder. Thus, when the tension | pulling area | region in a concrete member or the structure 1 arises, you may make it reinforce the concrete member or the structure 1 by applying a prestress to the thickness direction of the concrete of this part.

具低的には、図11の左片側に示すように、コンクリート部材またはコンクリート構造物1(例えば桁6)の端部の下部に向かって傾斜したアンカー孔4を設け、アンカー孔4の奥部側に大径環状係止溝部16(図示の場合)あるいは截頭円錐状溝4bを設け、前記と同様プレストレス力導入装置8を配置し充填材17を充填・硬化して、中空PC鋼棒6を緊張定着させた形態である。なお、前記の形態と同様な部分には、同様な符号を付して説明を省略する。
In detail, as shown on the left side of FIG. 11, an anchor hole 4 inclined toward the lower part of the end of the concrete member or concrete structure 1 (for example, the girder 6) is provided, and the inner part of the anchor hole 4 is provided. A large-diameter annular locking groove 16 (in the case of illustration) or a frustoconical groove 4b is provided on the side, a prestressing force introduction device 8 is disposed in the same manner as described above, and the filler 17 is filled and hardened to form a hollow PC steel rod. 6 is a form in which tension is fixed. In addition, the same code | symbol is attached | subjected to the part similar to the said form, and description is abbreviate | omitted.

前記実施形態で示すように、プレストレス力導入装置に、緊張されるPC鋼棒とその両端部の雄ねじ軸部にねじ込まれるナットを有する支圧部を備えていると、簡単な構造のプレストレス力導入装置を使用して、そのプレストレス力導入装置の先端部を一方のコンクリート部材に強固に定着でき、また、一方のコンクリート部材と他方の部材とにプレストレスを導入した強固な接合構造とすることができる。   As shown in the above embodiment, when the prestressing force introducing device includes a supporting portion having a PC steel rod to be tensioned and nuts to be screwed into male screw shafts at both ends thereof, a prestress having a simple structure is provided. Using a force introducing device, the tip of the prestress force introducing device can be firmly fixed to one concrete member, and a strong joint structure in which prestress is introduced into one concrete member and the other member, can do.

また、プレストレス力導入装置が、中空PC鋼棒の内部に押込み用反力PC鋼棒を押込むことで緊張された前記中空PC鋼棒を備えたプレストレス力導入装置であると、予め工場製作の中空PC鋼棒等を配置できるため、高い品質を維持するために高度の管理の必要がなく、現場施工性がよく、工期の短縮が図ることができ、また、施工コストを低減することができる。   In addition, if the prestress force introduction device is a prestress force introduction device provided with the hollow PC steel rod that has been tensioned by pushing the reaction force PC steel rod into the hollow PC steel rod, Since it is possible to place manufactured hollow PC steel bars, etc., there is no need for advanced management to maintain high quality, good on-site workability, shortening the construction period, and reducing construction costs. Can do.

なお、本願を実施する場合、両方のコンクリート部材またはコンクリート構造物1のアンカー孔に、大径係止溝付係止部あるいは拡径する截頭円錐状係止溝を設けるようにして、より高いプレストレスを導入して、より強固な接合構造としてもよい。 When carrying out the present application , the anchor holes of both the concrete members or the concrete structure 1 are provided with a locking portion with a large-diameter locking groove or a frusto-conical locking groove that expands in diameter. Pre-stress may be introduced to obtain a stronger bonding structure.

本発明のプレストレス式の接合構造において用いる大径環状係止溝付アンカー孔を形成すべく拡径溝形成装置の駆動軸先端部を配置した状態を示す縦断側面図である。It is a vertical side view which shows the state which has arrange | positioned the drive shaft front-end | tip part of the enlarged diameter groove forming apparatus in order to form the anchor hole with a large diameter annular locking groove used in the prestress type joining structure of this invention. 拡径溝形成装置の駆動軸先端部をアンカー孔周面に沿って振り回すように揺動する説明図である。It is explanatory drawing rock | fluctuated so that the drive shaft front-end | tip part of an enlarged diameter groove formation apparatus may be swung along an anchor hole surrounding surface. (a)は、拡径溝形成装置の駆動軸先端部を振り回すように揺動して大径環状係止溝を形成した後、一方のコンクリ―ト部材の大径環状係止溝付アンカー孔と他方の部材のプレストレス力導入装置配置用孔にわたってプレストレス力導入装置を配置した状態を示す縦断側面図、(b)はプレストレス力導入装置の回りに充填材を充填・硬化すると共にプレストレスを導入して接合した状態を示す縦断側面図である。(A) shows a large diameter annular locking groove anchor hole of one concrete member after swinging so as to swing the drive shaft tip of the enlarged diameter groove forming device to form a large diameter annular locking groove. FIG. 5B is a longitudinal side view showing a state in which the prestress force introduction device is arranged over the prestress force introduction device arrangement hole of the other member, FIG. It is a vertical side view which shows the state joined by introducing stress. (a)は、截頭円錐状係止溝を形成した後、一方のコンクリ―ト部材の截頭円錐状係止溝付アンカー孔と他方の部材のプレストレス力導入装置配置用孔にわたってプレストレス力導入装置を配置した状態を示す縦断側面図、(b)はプレストレス力導入装置の回りに充填材を充填・硬化すると共にプレストレスを導入して接合した状態を示す縦断側面図である。(A) shows that after forming the frustoconical locking groove, the prestress is applied over the anchor hole with the frustoconical locking groove of one concrete member and the prestress force introduction device arrangement hole of the other member. FIG. 5B is a longitudinal side view showing a state in which the force introducing device is disposed, and FIG. 5B is a longitudinal side view showing a state in which the filler is filled and cured around the prestressing force introducing device and the prestress is introduced and joined. 本発明において使用するプレストレス力導入装置の一形態を示すものであって、(a)は一部切欠側面図、(b)は一部切欠縦断側面図である。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows an embodiment of a prestress force introduction device used in the present invention, where (a) is a partially cutaway side view, and (b) is a partially cutout longitudinal side view. 本発明において使用可能なプレストレス力導入装置の他の形態を示すものであって、(a)および(b)は縦断側面図である。The other form of the prestressing force introduction | transduction apparatus which can be used in this invention is shown, Comprising: (a) And (b) is a vertical side view. 油圧ジャッキを備えた枠形フレームにプレストレス力導入装置をセットして中空PC鋼棒に緊張力を導入する場合の一形態を示す縦断側面図である。It is a vertical side view which shows one form in the case of setting a prestress force introduction apparatus in the frame-shaped frame provided with the hydraulic jack, and introducing tension | tensile_strength to a hollow PC steel bar. 一方のコンクリート構造物の端部にプレキャストコンクリートブロックを配置固定して、プレストレスを導入して接合している状態を示す断面図である。It is sectional drawing which shows the state which has arrange | positioned and fixed the precast concrete block to the edge part of one concrete structure, and has introduced and joined the prestress. (a)は貫通孔を設けて接合する形態の説明図、(b)はその一部を拡大して示す図である。(A) is explanatory drawing of the form which provides a through-hole and joins, (b) is the figure which expands and shows the part. コンクリート製橋脚側の片持ち式支持部とコンクリート製桁との接合部のせん断抵抗を高めるプレスツレス式の接合構造を示す縦断側面図である。It is a vertical side view which shows the press tress type | mold joint structure which raises the shear resistance of the junction part of the cantilever-type support part by the side of concrete piers, and a concrete girder. コンクリート部材またはコンクリート構造物1(例えば桁)の端部の下部に向かって傾斜してプレストレス力導入装置を配置して補強する場合の形態を示す縦断側面図である。It is a vertical side view which shows the form in the case of inclining toward the lower part of the edge part of a concrete member or concrete structure 1 (for example, girder), and arrange | positioning and reinforcing a prestress force introduction apparatus.

符号の説明Explanation of symbols

1 コンクリート部材
2 貫通した孔
3 貫通した孔
4 アンカー孔
4a 大径環状係止溝付アンカー孔
4b 截頭円錐状溝
4c 截頭円錐状溝付アンカー孔
4d プレストレス力導入装置配置用孔
5 コンクリートブロック
5a 他方の部材
5b 他方の部材
6 中空PC鋼棒
7 押込み用反力PC鋼棒
8 プレストレス力導入装置
9 無収縮モルタル
10 駆動軸
11 ガイドプレート
12 円版状部
13 ビット
14 拡径溝形成装置
15 ヘッド
16 大径の環状溝
16a 大径環状係止溝部
17 グラウト(充填材)
18 支承用凹溝(または支承側面)
19 支圧プレート
20 雄ねじ部
21 雄ねじ部
22 雌ねじ孔
23 雌ねじ孔
24 回動工具係合用外面
25 支承筒
26 ストッパ
27 前部雄ねじ部
28 回動工具係合用外面
29 凹部
30 押圧係止片
31 雌ねじ部
32 アンカー材
33 枠形フレーム
34 液圧ジャッキ
35 可動ピストン
36 押込み鋼棒
37 アンカー材
38 PC鋼棒
39 ナット
39a 支圧プレート
39b 支圧部
40 接着兼用防錆材
41 雄ねじ部材
43 前部フレーム
44 後部フレーム
45 連結ロッド
46 雄ねじ部
47 雄ねじ部
49 アンカープレート
50 ワッシャ
51 反力PC鋼棒定着用ナット
52 カップラー
53 引張用螺杆
54 間隔保持部材
55 脚部
56 センターホールジャッキ
57 ナット
58 可動ピストン
59 跡埋めモルタル
60 橋脚
61 片持ち式支持部
62 コンクリート製桁
63 支承装置
64 コンクリートまたはモルタルからなる充填材
65 PC鋼材
DESCRIPTION OF SYMBOLS 1 Concrete member 2 Through-hole 3 Through-hole 4 Anchor hole 4a Anchor hole 4b with large-diameter annular locking groove 4c conical groove 4c frustoconical grooved anchor hole 4d prestress force introduction device arrangement hole 5 concrete Block 5a The other member 5b The other member 6 Hollow PC steel rod 7 Pushing reaction force PC steel rod 8 Prestress force introduction device 9 Non-shrinking mortar 10 Drive shaft 11 Guide plate 12 Circular plate portion 13 Bit 14 Diameter expansion groove formation Device 15 Head 16 Large-diameter annular groove 16a Large-diameter annular locking groove portion 17 Grout (filler)
18 Groove for bearing (or side of bearing)
19 Supporting Plate 20 Male Threaded Part 21 Male Threaded Part 22 Female Threaded Hole 23 Female Threaded Hole 24 Rotating Tool Engaging Outer Surface 25 Bearing Tube 26 Stopper 27 Front Male Threaded Part 28 Rotating Tool Engaging Outer Surface 29 Recess 30 Press Locking Piece 31 Female Threaded Part 32 Anchor material 33 Frame-shaped frame 34 Hydraulic jack 35 Movable piston 36 Pushing steel rod 37 Anchor material 38 PC steel rod 39 Nut 39a Bearing plate 39b Bearing portion 40 Adhesive rust preventive material 41 Male screw member 43 Front frame 44 Rear portion Frame 45 Connecting rod 46 Male thread part 47 Male thread part 49 Anchor plate 50 Washer 51 Reaction force PC steel rod fixing nut 52 Coupler 53 Pulling screw 54 Spacing member 55 Leg part 56 Center hole jack 57 Nut 58 Movable piston 59 Trace filling mortar 60 Pier 61 Cantilever support 62 Filler 65 PC steel consisting Nkurito manufactured digits 63 bearing device 64 concrete or mortar

Claims (3)

既設のコンクリート部材またはコンクリート構造物に切削加工により設けたアンカー孔内に、内部に押し込み用反力PC鋼棒を押込むことで緊張された中空PC鋼棒を備えたプレストレス力導入装置を配置すると共に、前記アンカー孔と前記プレストレス力導入装置との間に充填材を充填して硬化させて、前記コンクリート部材またはコンクリート構造物にプレストレスを導入するプレストレス力導入装置の定着構造において、前記アンカー孔は、アンカー孔軸方向に伸び、直径が前記プレストレス力導入装置の外形よりも大きい小径アンカー孔と、前記小径アンカー孔の奥部にこの小径アンカー孔よりも大径の環状溝が前記小径アンカー孔と同心状にアンカー孔軸方向に間隔をおいて複数、前記小径アンカー孔の奥部内周面を周方向に均一にビットを備えている拡径溝形成装置により切削して形成された大径環状係止溝部とを備えた大径環状係止溝部付アンカー孔であり、かつ前記プレストレス力導入装置の先端側の定着部は、前記大径環状係止溝部の領域または前記大径環状係止溝部より奥部の領域に位置するように配置されていることを特徴とするプレストレス力導入装置の定着構造。 A prestress force introduction device equipped with a hollow PC steel bar that has been tensioned by pushing a reaction steel PC bar into the inside of an anchor hole provided by cutting in an existing concrete member or concrete structure. In addition, in the fixing structure of the prestressing force introduction device that introduces prestress into the concrete member or the concrete structure by filling and hardening a filler between the anchor hole and the prestressing force introduction device, The anchor hole extends in the axial direction of the anchor hole, and has a small-diameter anchor hole whose diameter is larger than the outer shape of the prestress force introducing device, and an annular groove having a diameter larger than that of the small-diameter anchor hole at the back of the small-diameter anchor hole. plural at intervals in the anchor Anajiku direction to the small anchor hole and concentric, uniform inner inner peripheral surface of the small-diameter anchor holes in the circumferential direction A large diameter annular locking groove with the anchor hole and a large diameter annular locking groove formed by cutting the enlarged diameter groove forming apparatus is provided with a bit, and the distal end side of the prestressing force introduction device The fixing structure of the prestressing force introducing device, wherein the fixing portion is disposed so as to be located in a region of the large-diameter annular locking groove portion or a region deeper than the large-diameter annular locking groove portion. 既設のコンクリート部材またはコンクリート構造物に切削加工により設けたアンカー孔と、他部材に設けたプレストレス力導入装置配置用孔とにわたって、内部に押し込み用反力PC鋼棒を押込むことで緊張された中空PC鋼棒を備えたプレストレス力導入装置を配置すると共に、前記アンカー孔および前記プレストレス力導入装置配置用孔と前記プレストレス力導入装置との間に充填材を充填して硬化させ、前記コンクリート部材または前記コンクリート構造物と前記他部材とをプレストレスを導入するように接合するプレストレス式の接合構造において、前記プレストレス力導入装置配置用孔及び前記アンカー孔の直径は前記プレストレス力導入装置の外形よりも大きく、前記アンカー孔は、アンカー孔軸方向に伸びる小径アンカー孔と、前記小径アンカー孔の奥部にこの小径アンカー孔よりも大径の環状溝が前記小径アンカー孔と同心状にアンカー孔軸方向に間隔をおいて複数、前記小径アンカー孔の奥部内周面を周方向に均一にビットを備えている拡径溝形成装置により切削して形成された大径環状係止溝部とを備えた大径環状係止溝部付アンカー孔であり、かつ前記プレストレス力導入装置は、先端側の定着部が前記大径環状係止溝部の領域または大径環状係止溝部より奥部の領域に位置するように配置され、後端側が前記プレストレス力導入装置配置用孔内における外部に近い位置に配置されていることを特徴とするプレストレス式の接合構造。 It is tensioned by pushing the reaction force PC steel rod for pushing into the existing concrete member or concrete structure through the anchor hole provided by cutting and the prestress force introduction device placement hole provided in the other member. A prestressing force introducing device having a hollow PC steel rod, and filling and hardening a filler between the anchor hole and the prestressing force introducing device arranging hole and the prestressing force introducing device. In the prestressing type joining structure in which the concrete member or the concrete structure and the other member are joined so as to introduce prestress, the diameters of the prestress force introduction device arranging hole and the anchor hole are the prestressed diameters. The anchor hole is larger than the outer shape of the stress force introducing device, and the anchor hole is a small-diameter anchor hole extending in the anchor hole axial direction. Circumferential plurality, the inner inner peripheral surface of the small-diameter anchor holes at intervals in the anchor Anajiku direction inner portion an annular groove having a diameter larger than the diameter anchor holes into the small-diameter anchor hole and concentric of the small anchor hole An anchor hole with a large-diameter annular locking groove portion formed by cutting with a large-diameter groove forming device having a uniform bit in the direction , and the prestress force introducing device Is arranged such that the fixing portion on the front end side is positioned in the region of the large-diameter annular locking groove portion or the region deeper than the large-diameter annular locking groove portion, and the rear end side is in the prestress force introduction device arranging hole. A prestressed joint structure characterized by being arranged at a position close to the outside in 前記プレストレス力導入装置が、前記コンクリート部材またはコンクリート構造物と前記他部材との接合境界面に交差するように、傾斜して配置されていることを特徴とする請求項2に記載のプレストレス式の接合構造。   The prestressing device according to claim 2, wherein the prestressing force introducing device is disposed so as to be inclined so as to intersect a joint boundary surface between the concrete member or the concrete structure and the other member. Formula junction structure.
JP2004231337A 2004-08-06 2004-08-06 Prestress force introduction device anchoring structure and prestressed joint structure Expired - Fee Related JP3989474B2 (en)

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