JP2023110390A - Precast concrete slab and its construction method - Google Patents

Precast concrete slab and its construction method Download PDF

Info

Publication number
JP2023110390A
JP2023110390A JP2022011803A JP2022011803A JP2023110390A JP 2023110390 A JP2023110390 A JP 2023110390A JP 2022011803 A JP2022011803 A JP 2022011803A JP 2022011803 A JP2022011803 A JP 2022011803A JP 2023110390 A JP2023110390 A JP 2023110390A
Authority
JP
Japan
Prior art keywords
joint
protruding muscle
joint structure
protruding
precast concrete
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP2022011803A
Other languages
Japanese (ja)
Other versions
JP7250967B1 (en
Inventor
俊之 黒岩
Toshiyuki Kuroiwa
亮太 笠倉
Ryota Kasakura
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tokyu Construction Co Ltd
Original Assignee
Tokyu Construction Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tokyu Construction Co Ltd filed Critical Tokyu Construction Co Ltd
Priority to JP2022011803A priority Critical patent/JP7250967B1/en
Priority to JP2023010262A priority patent/JP7385064B2/en
Application granted granted Critical
Publication of JP7250967B1 publication Critical patent/JP7250967B1/en
Publication of JP2023110390A publication Critical patent/JP2023110390A/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00—Adapting or protecting infrastructure or their operation
    • Y02A30/60—Planning or developing urban green infrastructure

Landscapes

  • Bridges Or Land Bridges (AREA)

Abstract

To provide a precast concrete slab that improves the workability on site and can secure quality of the junction even under the influence of distortion or vibration.SOLUTION: A precast concrete slab consists of a main body 2 and a joint structure 1 arranged at least at a part of the peripheral surface of the main body, and is configured in a way described hereinafter. The aforesaid joint structure 1 consists of: an upper joint structure 11 that comprises an upper joint top face, an upper joint bottom face, a first vertical face and a second vertical face of the upper joint, an upper joint slope, and upper protrusion reinforcement bars 311; and/or a lower joint structure 12 that comprises a lower joint top face, a lower joint bottom face, a first vertical face and a second vertical face of the lower joint, a lower joint slope, and lower protrusion reinforcement bars 321. When one side of a joint is the aforesaid upper joint structure 11, the other side of the joint is arranged to be the aforesaid lower joint structure 12. Both the aforesaid upper/lower protrusion reinforcement bars 311/321 have tips with male screw shape, comprising upper/lower anchor plates 312/322 and upper/lower nuts 313/323. Upper/lower protrusion-bar-housing parts that can accommodate the protrusion reinforcement bars 311/321 are included. Inserts capable of adjusting the protrusion length are included. Upper/lower notches continuous to the aforesaid upper/lower protrusion-bar-housing parts are included.SELECTED DRAWING: Figure 1

Description

本発明は、プレキャストコンクリート版に関し、より具体的には、端面に接合部を有するプレキャストコンクリート版及びその施工方法並びにプレキャストコンクリート版の継手に関する。 TECHNICAL FIELD The present invention relates to a precast concrete slab, and more specifically, to a precast concrete slab having joints on its end faces, a method for constructing the same, and a joint of the precast concrete slab.

近年、高速道路や橋梁等を構築する際には、床スラブとしてプレキャストコンクリート床版が多用されている。
プレキャストコンクリート床版は、主桁間に複数枚を並べて敷設する。そして、橋軸方向で隣り合うプレキャストコンクリート床版どうしは、継手を設けて連結する。
継手の形状としては、以下に示す様々な継手構造が知られている。 In recent years, when constructing highways, bridges, etc., precast concrete floor slabs are often used as floor slabs.
Multiple precast concrete floor slabs are laid side by side between the main girders. Then, the precast concrete floor slabs adjacent to each other in the bridge axis direction are connected by providing joints.
As for the shape of the joint, various joint structures shown below are known.

特許文献１には、プレキャストコンクリート床版の端面からループ形状の鉄筋を突設し、それぞれのループ鉄筋を重ね合わせるとともに、さらに補強筋を配置し、間詰めコンクリートを打設して一体化したループ継手が開示されている。
特許文献２、３には、プレキャストコンクリート床版の端面から先端にナットや圧着グリップ等の定着体を設けた鉄筋を突設し、それぞれの鉄筋を重ね合わせるとともに、さらに補強筋を配筋し、間詰めコンクリートを打設して一体化した継手が開示されている。
特許文献４には、プレキャストコンクリート床版の端面から鉄筋を突設し、それぞれの鉄筋を重ね合わせるとともに、間詰めコンクリートとして高強度な繊維補強コンクリートを打設して一体化した継手が開示されている。 In Patent Document 1, loop-shaped reinforcing bars are protruded from the end face of a precast concrete floor slab, the looped reinforcing bars are overlapped, further reinforcing bars are arranged, and interstitial concrete is poured to integrate the loops. A fitting is disclosed.
In Patent Documents 2 and 3, rebars provided with fixing bodies such as nuts and crimping grips are protruded from the end face of a precast concrete floor slab at the tip, and the respective rebars are overlapped and further reinforcing bars are arranged, Joints integrated by casting interfilling concrete are disclosed.
Patent Document 4 discloses a joint in which reinforcing bars are protruded from the end face of a precast concrete floor slab, the respective reinforcing bars are overlapped, and high-strength fiber-reinforced concrete is poured as interfilling concrete to integrate them. there is

特開２００９－２６４０４０号公報JP 2009-264040 A 特開２０１５－００１０４５号公報JP 2015-001045 A 特開２００７－２３１５６９号公報JP 2007-231569 A 特開２０１９－００２２５１号公報JP 2019-002251 A

上記に開示した継手構造には、以下のような問題がある。
（１）ループ継手は鉄筋をループ状に曲げ加工するため、プレキャストコンクリート床版の厚みをループの形状に応じた厚さに設定する必要があり、必要以上に厚くせざるを得ない場合がある。
（２）補強筋の配置は施工に手間がかかる。
（３）間詰めコンクリートの打設には、型枠の設置、打設作業、養生、型枠の解体等の現場作業が多くなる。
（４）下型枠の設置を省略するためにあごを設けると、あごと鉄筋が干渉しない位置にプレキャストコンクリート床版を吊り降ろし、継手の分だけ水平移動する必要があり、作業効率が落ちる。
（５）高強度な繊維補強コンクリートは高価であり、施工コストが高くなる。 The joint structure disclosed above has the following problems.
(1) Since loop joints are made by bending reinforcing bars into loops, it is necessary to set the thickness of the precast concrete floor slabs according to the shape of the loops. .
(2) Arrangement of reinforcing bars is time-consuming.
(3) Placement of interstitial concrete entails many on-site operations such as installation of formwork, pouring work, curing, and dismantling of formwork.
(4) If a jaw is provided to omit the installation of the lower formwork, the precast concrete floor slab must be lowered at a position where the jaw and reinforcing bars do not interfere, and it must be moved horizontally by the amount of the joint, which reduces work efficiency.
(5) High-strength fiber-reinforced concrete is expensive, resulting in high construction costs.

特に、近年は高速道路や橋梁等の修繕・更新のために、床版の取替工事が広く行われている。
道路を片側供用し、道路の幅員方向の部分的に床版を取り替える場合、変形や振動の影響があると間詰めコンクリートの品質が確保できないため、間詰めコンクリートが硬化するまでは全面通行止めが必要となってしまう。また、硬化するまでに変形や振動の影響がある場合には、接合位置を縦梁の位置に限定するか、接合位置に新たに縦梁を追加する必要があり、不経済である。 In recent years, in particular, floor slab replacement work has been widely performed for the repair and renewal of highways and bridges.
When one side of the road is used and the floor slab is partially replaced in the width direction of the road, the quality of the interstitial concrete cannot be ensured due to the effects of deformation and vibration, so it is necessary to close all traffic until the interstitial concrete hardens. becomes. In addition, if there is an effect of deformation or vibration before hardening, it is necessary to limit the joint position to the position of the vertical beam or add a new vertical beam to the joint position, which is uneconomical.

本発明は、現場での作業性を向上するとともに、変形や振動の影響下においても接合部の品質を確保することができる、プレキャストコンクリート版及びその施工方法並びにプレキャストコンクリート版の継手を提供することを目的とする。 The present invention provides a precast concrete slab, its construction method, and a joint of precast concrete slabs, which can improve the workability on site and ensure the quality of joints even under the influence of deformation and vibration. With the goal.

上記目的を達成するためになされた本願の第一発明は、本体と、前記本体の周面の少なくとも一部に設けた継手構造と、を有し、前記継手構造は、上継手上面と、前記本体からの突出長さが前記上継手上面より短い上継手下面と、前記上継手上面の端部から鉛直下方に延びる上継手第一鉛直面と、前記上継手下面の端部から鉛直上方に延びる上継手第二鉛直面と、前記上継手第一鉛直面の下端と前記上継手第二鉛直面の上端を結ぶ上継手傾斜面と、前記上継手第一鉛直面に突設する上突出筋と、を有する、上継手構造及び／又は、下継手上面と、前記本体からの突出長さが前記下継手上面より長い下継手下面と、前記下継手上面の端部から鉛直下方に延びる下継手第一鉛直面と、前記下継手下面の端部から鉛直上方に延びる下継手第二鉛直面と、前記下継手第一鉛直面の下端と前記下継手第二鉛直面の上端を結ぶ下継手傾斜面と、前記下継手第二鉛直面に突設する下突出筋とを有する、下継手構造を有し、前記本体の対向する前記周面において、一方が前記上継手構造のとき、他方を前記下継手構造により構成し、前記上突出筋と、前記下突出筋とは、いずれも、先端が雄ネジ状であり、前記上突出筋、前記下突出筋に挿通する上定着板、下定着板と、前記上突出筋、前記下突出筋の先端に螺合する上ナット、下ナットと、を有し、前記上継手下面は、前記下突出筋を収容可能な下突出筋格納部を有し、前記下継手上面は、前記上突出筋を収容可能な上突出筋格納部を有し、前記上継手第一鉛直面又は前記上継手第二鉛直面と、前記下継手第一鉛直面又は前記下継手第二鉛直面とは、突設長が調整可能なインサートを有し、前記上継手構造を有する前記本体の下面又は前記上継手下面に、前記下突出筋格納部の前記本体側の端部と連続し、前記下定着板と前記下ナットを収める下切り欠きを有し、前記下継手構造を有する前記本体の上面又は前記下継手上面に、前記上突出筋格納部の前記本体側の端部と連続し、前記上定着板と前記上ナットを収める上切り欠きを有する、プレキャストコンクリート版を提供する。
本願の第二発明は、第一発明において、前記上継手構造は、前記上継手上面又は前記本体の上面から前記下切り欠き又は前記下突出筋格納部まで貫通する充填口を有することを特徴とする。
本願の第三発明は、第一発明又は第二発明において、前記上継手上面は、内側面にボルト孔を有するボルトボックスを有し、前記下継手傾斜面は、前記ボルト孔に対応するアンカーナットを有することを特徴とする。
本願の第四発明は、第一発明又は第二発明において、前記上継手上面と前記下継手下面とは、内側面にボルト孔を有するボルトボックスを有することを特徴とする。
本願の第五発明は、第一発明又は第二発明のプレキャストコンクリート版どうしを接続して床スラブを構成する、プレキャストコンクリート版の施工方法であって、前記上継手構造を有するプレキャストコンクリート版を吊り上げ、既に設置した、前記下継手構造を有するプレキャストコンクリート版の前記上突出筋格納部と前記上切り欠きに、前記上突出筋と前記上定着板及び前記上ナットが収まり、前記上継手構造を有するプレキャストコンクリート版の前記下突出筋格納部と前記下切り欠きに、前記下突出筋と前記下定着板及び前記下ナットが収まるように、前記上継手構造と前記下継手構造との間に所定の隙間を設けて吊り降ろし、前記上継手構造の前記インサートと前記下継手構造の前記インサートの突出長さを調整し、それぞれ対向する前記下継手第一鉛直面又は前記下継手第二鉛直面及び前記上継手第一鉛直面又は前記上継手第二鉛直面に当接し、前記上突出筋の先端の前記上ナットと、前記下突出筋の前記下ナットと、を締め込み、前記上定着板及び前記下定着板を前記上突出筋格納部の端部及び前記下突出筋格納部の端部に押し付けて前記上突出筋及び前記下突出筋を緊張し、前記隙間、前記上突出筋格納部、前記下突出筋格納部、前記上切り欠き及び前記下切り欠きに間詰材を充填することを特徴とする、プレキャストコンクリート版の施工方法を提供する。
本願の第六発明は、第三発明のプレキャストコンクリート版どうしを接続して床スラブを構成する、プレキャストコンクリート版の施工方法であって、前記上継手構造を有するプレキャストコンクリート版を吊り上げ、既に設置した、前記下継手構造を有するプレキャストコンクリート版の前記上突出筋格納部と前記上切り欠きに、前記上突出筋と前記上定着板及び前記上ナットが収まり、前記上継手構造を有するプレキャストコンクリート版の前記下突出筋格納部と前記下切り欠きに、前記下突出筋と前記下定着板及び前記下ナットが収まるように、前記上継手構造と前記下継手構造との間に所定の隙間を設けて吊り降ろし、前記上継手構造の前記インサートと前記下継手構造の前記インサートの突出長さを調整し、それぞれ対向する前記下継手第一鉛直面又は前記下継手第二鉛直面及び前記上継手第一鉛直面又は前記上継手第二鉛直面に当接し、前記上継手構造の前記ボルトボックスの前記ボルト孔にボルトを挿入し、前記下継手構造の前記アンカーナットに前記ボルトを螺合し、前記上突出筋の先端の前記上ナットと、前記下突出筋の前記下ナットと、を締め込み、前記上定着板及び前記下定着板を前記上突出筋格納部の端部及び前記下突出筋格納部の端部に押し付けて前記上突出筋及び前記下突出筋を緊張し、前記隙間、前記上突出筋格納部、前記下突出筋格納部、前記上切り欠き、前記下切り欠き及び前記ボルトボックスに間詰材を充填することを特徴とする、プレキャストコンクリート版の施工方法を提供する。
本願の第七発明は、第四発明のプレキャストコンクリート版どうしを接続して床スラブを構成する、プレキャストコンクリート版の施工方法であって、前記上継手構造を有するプレキャストコンクリート版を吊り上げ、既に設置した、前記下継手構造を有するプレキャストコンクリート版の前記上突出筋格納部と前記上切り欠きに、前記上突出筋と前記上定着板及び前記上ナットが収まり、前記上継手構造を有するプレキャストコンクリート版の前記下突出筋格納部と前記下切り欠きに、前記下突出筋と前記下定着板及び前記下ナットが収まるように、前記上継手構造と前記下継手構造との間に所定の隙間を設けて吊り降ろし、前記上継手構造の前記インサートと前記下継手構造の前記インサートの突出長さを調整し、それぞれ対向する前記下継手第一鉛直面又は前記下継手第二鉛直面及び前記上継手第一鉛直面又は前記上継手第二鉛直面に当接し、前記上継手構造又は前記下継手構造のいずれか一方の前記ボルトボックスの前記ボルト孔にボルトを挿入して他方の前記ボルトボックスの前記ボルト孔を貫通させ、他方の前記ボルトボックス内で前記ボルトにナットを螺合し、前記上突出筋の先端の前記上ナットと、前記下突出筋の前記下ナットと、を締め込み、前記上定着板及び前記下定着板を前記上突出筋格納部の端部及び前記下突出筋格納部の端部に押し付けて前記上突出筋及び前記下突出筋を緊張し、前記隙間、前記上突出筋格納部、前記下突出筋格納部、前記上切り欠き、前記下切り欠き及び前記ボルトボックスに間詰材を充填することを特徴とする、プレキャストコンクリート版の施工方法を提供する。
本願の第八発明は、第五発明乃至第七発明のいずれかにおいて、前記隙間、前記上突出筋格納部、前記下突出筋格納部、前記上切り欠き及び前記下切り欠きへの前記間詰材の充填は、前記プレキャストコンクリート版の下面側から行うことを特徴とする。
本願の第九発明は、プレキャストコンクリート版の端面に設ける、プレキャストコンクリート版の継手であって、継手上面と、前記継手上面より前記プレキャストコンクリート版からの突出長さが前記継手上面より短い継手下面と、前記継手上面の端部から鉛直下方に延びる第一鉛直面と、前記継手下面の端部から鉛直上方に延びる第二鉛直面と、前記第一鉛直面の下端と前記第二鉛直面の上端を結ぶ傾斜面と、前記第一鉛直面に突設する突出筋と、前記第一鉛直面又は前記第二鉛直面の少なくともいずれか一方に、突設長が調整可能に設けるインサートと、を有し、前記突出筋は先端が雄ネジ状であり、前記突出筋に挿通する定着板と、前記突出筋の先端に螺合するナットと、を有し、前記継手下面は、他の前記継手と組み合わせた際に前記突出筋を収容可能な突出筋格納部を有することを特徴とする。
本願の第十発明は、第九発明において、前記継手上面は、内側面にボルト孔を有するボルトボックスを有することを特徴とする。 A first invention of the present application, which has been made to achieve the above object, has a main body and a joint structure provided on at least a part of the peripheral surface of the main body, and the joint structure includes an upper joint upper surface and the An upper joint lower surface protruding from the main body shorter than the upper joint upper surface, an upper joint first vertical surface extending vertically downward from an end of the upper joint upper surface, and an upper joint extending vertically upward from an end of the upper joint lower surface. An upper joint second vertical surface, an upper joint inclined surface connecting the lower end of the upper joint first vertical surface and the upper end of the upper joint second vertical surface, and an upper protruding muscle protruding from the upper joint first vertical surface an upper joint structure and/or a lower joint upper surface, a lower joint lower surface protruding from the main body longer than the lower joint upper surface, and a lower joint upper surface extending vertically downward from an end of the lower joint upper surface. one vertical surface, a second vertical surface of the lower joint extending vertically upward from the end of the lower surface of the lower joint, and an inclined surface of the lower joint connecting the lower end of the first vertical surface of the lower joint and the upper end of the second vertical surface of the lower joint. and a lower protruding muscle protruding on the second vertical surface of the lower joint, and when one of the opposing peripheral surfaces of the main body is the upper joint structure, the other is the lower Each of the upper protruding muscle and the lower protruding muscle has a male threaded tip, and an upper fixing plate and a lower fixing plate are inserted through the upper protruding muscle and the lower protruding muscle. , an upper nut and a lower nut that are screwed to the tips of the upper protruding muscle and the lower protruding muscle, and the lower surface of the upper joint has a lower protruding muscle storage portion that can accommodate the lower protruding muscle, The lower joint upper surface has an upper protruding muscle storage portion capable of accommodating the upper protruding muscle, and the upper joint first vertical surface or the upper joint second vertical surface and the lower joint first vertical surface or the lower The second vertical surface of the joint has an insert whose projection length is adjustable, and is attached to the lower surface of the main body having the upper joint structure or the lower surface of the upper joint, the end portion of the lower protruding muscle storage portion on the main body side. and a lower notch for accommodating the lower fixing plate and the lower nut, and an end of the upper protruding muscle storage portion on the main body side on the upper surface of the main body having the lower joint structure or on the upper surface of the lower joint A precast concrete slab is provided which has an upper notch which is continuous with a part and accommodates the upper fixing plate and the upper nut.
A second invention of the present application is characterized in that, in the first invention, the upper joint structure has a filling port penetrating from the upper surface of the upper joint or the upper surface of the main body to the lower notch or the lower protruding muscle storage portion. do.
The third invention of the present application is the first invention or the second invention, wherein the upper joint top surface has a bolt box having a bolt hole on the inner side surface, and the lower joint inclined surface has an anchor nut corresponding to the bolt hole. characterized by having
A fourth invention of the present application is characterized in that, in the first invention or the second invention, the upper joint upper surface and the lower joint lower surface have a bolt box having a bolt hole on an inner surface thereof.
The fifth invention of the present application is a method for constructing a precast concrete slab by connecting the precast concrete slabs of the first invention or the second invention to form a floor slab, wherein the precast concrete slabs having the upper joint structure are lifted. , the upper protruding muscle, the upper fixing plate, and the upper nut are accommodated in the upper protruding muscle storage portion and the upper notch of the precast concrete slab having the lower joint structure, which has already been installed, and the upper joint structure is provided. A predetermined gap is formed between the upper joint structure and the lower joint structure so that the lower protruding bar, the lower fixing plate, and the lower nut are accommodated in the lower protruding bar storage portion and the lower notch of the precast concrete slab. Suspending with a gap, adjusting the projection length of the insert of the upper joint structure and the insert of the lower joint structure, the lower joint first vertical surface or the lower joint second vertical surface and the abut on the first vertical surface of the upper joint or the second vertical surface of the upper joint, tighten the upper nut on the tip of the upper protruding muscle and the lower nut on the lower protruding muscle, and tighten the upper fixing plate and the upper fixing plate; A lower fixing plate is pressed against the end of the upper protruding muscle storage part and the end of the lower protruding muscle storage part to tense the upper protruding muscle and the lower protruding muscle, thereby tightening the gap, the upper protruding muscle storage part, and the upper protruding muscle storage part. Provided is a method for constructing a precast concrete slab, characterized in that the lower protruding muscle storage portion, the upper notch, and the lower notch are filled with filler material.
The sixth invention of the present application is a method of constructing a precast concrete slab by connecting the precast concrete slabs of the third invention to form a floor slab, wherein the precast concrete slabs having the upper joint structure are lifted and have already been installed. , the upper protruding bar, the upper fixing plate and the upper nut are accommodated in the upper protruding bar storage portion and the upper notch of the precast concrete slab having the lower joint structure, and the precast concrete slab having the upper joint structure. A predetermined gap is provided between the upper joint structure and the lower joint structure so that the lower protruding muscle, the lower fixing plate, and the lower nut can be accommodated in the lower protruding muscle storage portion and the lower notch. lowering, adjusting the protruding length of the insert of the upper joint structure and the insert of the lower joint structure, and respectively facing the lower joint first vertical surface or the lower joint second vertical surface and the upper joint first Abut on the vertical surface or the second vertical surface of the upper joint, insert a bolt into the bolt hole of the bolt box of the upper joint structure, screw the bolt into the anchor nut of the lower joint structure, and The upper nut on the tip of the protruding muscle and the lower nut on the lower protruding muscle are tightened, and the upper fixing plate and the lower fixing plate are attached to the ends of the upper protruding muscle storage part and the lower protruding muscle storage part. to tighten the upper protruding muscle and the lower protruding muscle, and to the gap, the upper protruding muscle storage part, the lower protruding muscle storage part, the upper notch, the lower notch and the bolt box To provide a method for constructing a precast concrete slab, characterized by filling a filler material.
The seventh invention of the present application is a method of constructing a precast concrete slab by connecting the precast concrete slabs of the fourth invention to form a floor slab, wherein the precast concrete slabs having the upper joint structure are lifted and already installed. , the upper protruding bar, the upper fixing plate and the upper nut are accommodated in the upper protruding bar storage portion and the upper notch of the precast concrete slab having the lower joint structure, and the precast concrete slab having the upper joint structure. A predetermined gap is provided between the upper joint structure and the lower joint structure so that the lower protruding muscle, the lower fixing plate, and the lower nut can be accommodated in the lower protruding muscle storage portion and the lower notch. lowering, adjusting the protruding length of the insert of the upper joint structure and the insert of the lower joint structure, and respectively facing the lower joint first vertical surface or the lower joint second vertical surface and the upper joint first Abutting on the vertical surface or the second vertical surface of the upper joint, inserting a bolt into the bolt hole of the bolt box of either the upper joint structure or the lower joint structure, and inserting the bolt into the bolt hole of the other bolt box and a nut is screwed onto the bolt in the other bolt box, the upper nut on the tip of the upper protruding muscle and the lower nut on the lower protruding muscle are tightened, and the upper fixing plate and pressing the lower fixing plate against the end portion of the upper protruding muscle storage portion and the end portion of the lower protruding muscle storage portion to tense the upper protruding muscle and the lower protruding muscle to tighten the gap and the upper protruding muscle storage portion. , the lower protruding muscle storage part, the upper notch, the lower notch and the bolt box are filled with filler material.
The eighth invention of the present application is the filling of the gap, the upper protruding muscle storage part, the lower protruding muscle storage part, the upper notch and the lower notch in any one of the fifth to seventh inventions. Filling of the material is performed from the lower surface side of the precast concrete slab.
A ninth invention of the present application is a precast concrete slab joint provided on an end face of a precast concrete slab, comprising a joint upper surface and a joint lower surface in which the length of projection from the precast concrete slab from the joint upper surface is shorter than the joint upper surface. , a first vertical surface extending vertically downward from the end of the upper surface of the joint, a second vertical surface extending vertically upward from the end of the lower surface of the joint, a lower end of the first vertical surface, and an upper end of the second vertical surface a slanted surface connecting , a protruding streak protruding from the first vertical surface, and an insert provided on at least one of the first vertical surface and the second vertical surface so that the protruding length can be adjusted. The protruding muscle has a male-threaded tip, and has a fixing plate inserted through the protruding muscle and a nut screwed to the tip of the protruding muscle, and the lower surface of the joint is connected to the other joint. It is characterized by having a protruding muscle storage part capable of housing the protruding muscle when assembled.
A tenth invention of the present application is characterized in that, in the ninth invention, the joint upper surface has a bolt box having a bolt hole on the inner surface thereof.

本発明は、上記した課題を解決するための手段により、次のような効果の少なくとも一つを得ることができる。
（１）変形や振動の影響下においても接合部の間詰材の品質が確保できるため、道路を片側供用し、道路の幅員方向の部分的に床版を取り替える場合においても全面通行止めは不要となる。
（２）係合部どうしを係合するため、従来のようなループ継手がなく、プレキャストコンクリート床版の厚さを必要以上に厚くする必要がない。
（３）補強筋の配筋作業が不要となる。
（４）型枠の設置や解体等の現場作業を簡略化でき、現場での作業性が向上する。
（５）プレキャストコンクリート床版の下面から作業を行うことで、作業の安全性が向上する。
（６）間詰めコンクリートや、高強度な繊維補強コンクリートの打設作業を大幅に削減することができ、現場での作業性が向上する。 The present invention can obtain at least one of the following effects by the means for solving the above problems.
(1) Even under the influence of deformation and vibration, the quality of the filler material at the joint can be secured, so even if one side of the road is used and the floor slabs are partially replaced in the width direction of the road, there is no need to close the entire road. Become.
(2) Since the engaging portions are engaged with each other, there is no need for a conventional loop joint, and there is no need to increase the thickness of the precast concrete floor slab more than necessary.
(3) Reinforcement reinforcement work becomes unnecessary.
(4) On-site work such as installation and dismantling of formwork can be simplified, improving on-site workability.
(5) Work safety is improved by working from the lower surface of the precast concrete floor slab.
(6) It is possible to greatly reduce the work of placing interstitial concrete and high-strength fiber-reinforced concrete, improving workability on site.

実施例１のプレキャストコンクリート版の斜視図Perspective view of the precast concrete slab of Example 1 継手構造の斜視図Perspective view of joint structure 継手構造を係合した状態の説明図Explanatory drawing of a state in which the joint structure is engaged ボルトを介して継手構造を連結した状態の説明図（１）Explanatory drawing (1) of the state where the joint structure is connected via the bolt ボルトを介して継手構造を連結した状態の説明図（２）Explanatory diagram (2) of a state in which the joint structure is connected via a bolt 応力伝達状態の説明図Explanatory diagram of stress transmission state プレキャストコンクリート版の施工方法の説明図（１）Explanatory drawing of construction method of precast concrete slab (1) プレキャストコンクリート版の施工方法の説明図（２）Explanatory drawing of the construction method of precast concrete slab (2) プレキャストコンクリート版の施工方法の説明図（３）Explanatory drawing of construction method of precast concrete slab (3) 実施例２のプレキャストコンクリート版の説明図Explanatory drawing of the precast concrete slab of Example 2

以下、図面を参照しながら本発明について詳細に説明する。 The present invention will be described in detail below with reference to the drawings.

［実施例１］
（１）プレキャストコンクリート版の構成
本発明のプレキャストコンクリート版は、平面視矩形の本体２の対向する周面に継手構造１を一体に設ける（図１）。
本体２は従来のＲＣもしくはＰＣ、ＰＲＣ構造の床版であり、必要な耐荷重に合わせて配筋や厚さ、コンクリート強度等を設定する。従来の継手のようなループ鉄筋がないため、厚さを必要以上に厚くする必要がない。 [Example 1]
(1) Configuration of Precast Concrete Slab The precast concrete slab of the present invention has a joint structure 1 integrally provided on opposing peripheral surfaces of a main body 2 which is rectangular in plan view (FIG. 1).
The main body 2 is a floor slab of conventional RC, PC, or PRC structure, and the bar arrangement, thickness, concrete strength, etc. are set according to the required load resistance. There is no need to make the thickness thicker than necessary because there are no loop rebars like in conventional joints.

（２）継手構造
継手構造１は、コンクリート、モルタル、繊維補強コンクリート等により形成する。
継手構造１は予め工場等で本体２と一体としてもよいし、別に製作して現場等の本体２の製作場所に搬入し、本体２の製作時に一体としてもよい。
継手構造１は、上下に略対称形である上継手構造１１と下継手構造１２とを有する（図２）。
上継手構造１１は、本体２の上面２１と同一平面となる上継手上面１１１、上継手上面１１１より本体２からの突出長さが短い上継手下面１１２、上継手上面１１１の端部から鉛直下方に延びる上継手第一鉛直面１１３、上継手下面１１２の端部から鉛直上方に延びる上継手第二鉛直面１１４、及び上継手第一鉛直面１１３の下端と上継手第二鉛直面１１４の上端を結ぶ上継手傾斜面１１５と、を有する（図２（ａ））。
下継手構造１２は、本体２の上面２１と同一平面となる下継手上面１２１、下継手上面１２１より本体２からの突出長さが長い下継手下面１２２、下継手上面１２１の端部から鉛直下方に延びる下継手第一鉛直面１２３、下継手下面１２２の端部から鉛直上方に延びる下継手第二鉛直面１２４、及び下継手第一鉛直面１２３の下端と下継手第二鉛直面１２４の上端を結ぶ下継手傾斜面１２５と、を有する（図２（ｂ））。
上継手上面１１１と下継手上面１２１は本体２の上面２１と同一平面とせず、隣り合う本体２を接続した後に、上面２１との段差をコンクリート等により埋めてもよい。
上継手構造１１の上継手第一鉛直面１１３と、上継手第二鉛直面１１４、下継手構造１２の下継手第一鉛直面１２３、及び下継手第二鉛直面１２４の鉛直方向の長さは同一である。また、上継手構造１１の上継手傾斜面１１５と下継手構造１２の下継手傾斜面１２５の傾斜角は４５°である。
継手構造１は、少なくとも本体２の対向する部分（本実施例では一辺）に、一方が上継手構造１１の場合には他方が下継手構造１２となるように設ける。
なお、上継手構造１１の上継手傾斜面１１５と下継手構造１２の下継手傾斜面１２５の傾斜角は４５°に限定されず、継手構造１に発生する断面力に応じて継手構造１の傾斜角を変化させることで、後述するボルト４２に生じる圧縮力及び引張力を調整し、長寿命の接続構造とすることができる。 (2) Joint structure The joint structure 1 is made of concrete, mortar, fiber-reinforced concrete, or the like.
The joint structure 1 may be preliminarily integrated with the main body 2 at a factory or the like, or may be manufactured separately, brought into a manufacturing site of the main body 2 or the like, and integrated when the main body 2 is manufactured.
The joint structure 1 has an upper joint structure 11 and a lower joint structure 12 which are substantially vertically symmetrical (FIG. 2).
The upper joint structure 11 includes an upper joint upper surface 111 that is flush with the upper surface 21 of the main body 2 , an upper joint lower surface 112 that protrudes from the main body 2 in a shorter length than the upper joint upper surface 111 , and vertically downward from the end of the upper joint upper surface 111 . the upper joint first vertical surface 113 extending to the upper joint lower surface 112, the upper joint second vertical surface 114 extending vertically upward from the end of the upper joint lower surface 112, the lower end of the upper joint first vertical surface 113 and the upper end of the upper joint second vertical surface 114 and an upper joint inclined surface 115 (FIG. 2(a)).
The lower joint structure 12 includes a lower joint upper surface 121 that is flush with the upper surface 21 of the main body 2 , a lower joint lower surface 122 that projects longer than the lower joint upper surface 121 from the main body 2 , and a lower joint structure 12 that extends vertically downward from the end of the lower joint upper surface 121 . lower joint first vertical surface 123 extending to the lower joint lower surface 122, lower joint second vertical surface 124 extending vertically upward from the end of the lower joint lower surface 122, and the lower end of the lower joint first vertical surface 123 and the upper end of the lower joint second vertical surface 124 (FIG. 2(b)).
The upper joint upper surface 111 and the lower joint upper surface 121 may not be flush with the upper surface 21 of the main body 2, and the difference in level with the upper surface 21 may be filled with concrete or the like after the adjacent main bodies 2 are connected.
The vertical lengths of the upper joint first vertical surface 113 and the upper joint second vertical surface 114 of the upper joint structure 11 and the lower joint first vertical surface 123 and the lower joint second vertical surface 124 of the lower joint structure 12 are are identical. The inclination angle between the upper joint inclined surface 115 of the upper joint structure 11 and the lower joint inclined surface 125 of the lower joint structure 12 is 45°.
The joint structures 1 are provided at least on opposing portions (one side in this embodiment) of the main body 2 such that one is the upper joint structure 11 and the other is the lower joint structure 12 .
Note that the inclination angle between the upper joint inclined surface 115 of the upper joint structure 11 and the lower joint inclined surface 125 of the lower joint structure 12 is not limited to 45°, and the inclination of the joint structure 1 according to the cross-sectional force generated in the joint structure 1 is not limited to 45°. By changing the angle, the compressive force and tensile force generated in the bolt 42, which will be described later, can be adjusted, and a long-life connection structure can be provided.

（２．１）突出筋
上継手構造１１の上継手第一鉛直面１１３からは、水平に上突出筋３１１を突出する。
また、下継手構造１２の下継手第二鉛直面１２４からは、水平に下突出筋３２１を突出する。
上突出筋３１１と下突出筋３２１の先端は雄ネジ加工し、矩形の平板状の上定着板３１２、下定着板３２２を挿通して、上ナット３１３、下ナット３２３を螺合する。
上突出筋３１１と下突出筋３２１の突出長さは、それぞれ、継手構造を係合したときに対向した位置となる下継手構造１２の下継手上面１２１及び上継手構造１１の上継手下面１１２よりも長くする。また、下継手上面１２１と上継手下面１１２には、上突出筋３１１、下突出筋３２１を収める上突出筋格納部１２６、下突出筋格納部１１６を設ける。
上継手構造１１の下突出筋格納部１１６は下突出筋３２１の幅よりも広く、上継手第二鉛直面１１４から本体２の周面まで延びている。
下継手構造１２の上突出筋格納部１２６は上突出筋３１１の幅よりも広く、下継手第一鉛直面１２３から本体２の周面まで延びている。
上突出筋格納部１２６、下突出筋格納部１１６の端部の幅は、上定着板３１２、下定着板３２２よりも幅狭とする。 (2.1) Projecting muscle From the upper joint first vertical surface 113 of the upper joint structure 11, an upper projecting muscle 311 horizontally projects.
A lower protruding muscle 321 horizontally protrudes from the lower joint second vertical surface 124 of the lower joint structure 12 .
The ends of the upper protruding muscle 311 and the lower protruding muscle 321 are threaded, are inserted through the rectangular plate-shaped upper fixing plate 312 and the lower fixing plate 322, and are screwed with the upper nut 313 and the lower nut 323, respectively.
The projection lengths of the upper protruding muscle 311 and the lower protruding muscle 321 are respectively greater than the lower joint upper surface 121 of the lower joint structure 12 and the upper joint lower surface 112 of the upper joint structure 11, which are opposed to each other when the joint structures are engaged. also lengthen. The lower joint upper surface 121 and the upper joint lower surface 112 are provided with an upper protruding muscle storing portion 126 and a lower protruding muscle storing portion 116 for storing the upper protruding muscle 311 and the lower protruding muscle 321, respectively.
The lower protruding muscle storage part 116 of the upper joint structure 11 is wider than the width of the lower protruding muscle 321 and extends from the upper joint second vertical surface 114 to the peripheral surface of the main body 2 .
The upper protruding muscle storage portion 126 of the lower joint structure 12 is wider than the width of the upper protruding muscle 311 and extends from the lower joint first vertical surface 123 to the peripheral surface of the main body 2 .
The width of the end portions of the upper protruding muscle storage portion 126 and the lower protruding muscle storage portion 116 is made narrower than the upper fixing plate 312 and the lower fixing plate 322 .

（２．２）インサート
上継手構造１１の上継手第二鉛直面１１４と、下継手構造１２の下継手第一鉛直面１２３には、隣り合う下突出筋格納部１１６、上突出筋格納部１２６の間に、それぞれ水平にインサート１１７、１２７を突出して設ける。
インサート１１７、１２７は例えば突出したボルトに螺合するインサート金具であり、突出長さを調整可能とする。
なお、上継手構造１１のインサート１１７は上継手第一鉛直面１１３に設けてもよいし、下継手構造１２のインサート１２７は下継手第二鉛直面１２４に設けてもよい。 (2.2) Insert In the upper joint second vertical surface 114 of the upper joint structure 11 and the lower joint first vertical surface 123 of the lower joint structure 12, the adjacent lower protruding muscle storage portion 116 and upper protruding muscle storage portion 126 are adjacent to each other. Inserts 117 and 127 are horizontally protruding therebetween.
The inserts 117 and 127 are, for example, insert metal fittings screwed onto protruding bolts, and the protruding length can be adjusted.
The insert 117 of the upper joint structure 11 may be provided on the upper joint first vertical surface 113 , and the insert 127 of the lower joint structure 12 may be provided on the lower joint second vertical surface 124 .

（３）継手構造の係合
隣り合う本体２ａ、２ｂは、それぞれの上継手構造１１と下継手構造１２を係合する（図３）。
上継手構造１１の上突出筋３１１は下継手構造１２の上突出筋格納部１２６に収まり、下継手構造１２の下突出筋３２１は上継手構造１１の下突出筋格納部１１６に収まる。
上継手構造１１を設ける本体２ａの下面２２ａの端部には、下突出筋格納部１１６と連続し、下突出筋３２１の先端、下定着板３２２及び下ナット３２３を収める下切り欠き２３ａを設ける。また、下継手構造１２を設ける本体２ｂの上面２１ｂの端部には、上突出筋格納部１２６と連続し、上突出筋３１１の先端、上定着板３１２及び上ナット３１３を収める上切り欠き２３ｂを設ける。
上ナット３１３、下ナット３２３を締め込むことで、上定着板３１２、下定着板３２２が上突出筋格納部１２６、下突出筋格納部１１６の端部に押し付けられ、上継手構造１１と下継手構造１２が互いを引き寄せて一体となる。また、本体２ａの下切り欠き２３ａには、上面２１ａまで貫通する充填口２４を設ける。下切り欠き２３ａと充填口２４は上継手構造１１に設けてもよく、上切り欠き２３ｂは下継手構造１２に設けてもよい。このとき、上突出筋３１１と下突出筋３２１の突出長さは、下継手構造１２の下継手上面１２１及び上継手構造１１の上継手下面１１２よりも長くする必要がない。
インサート１１７、１２７は、突出長さを調整し、それぞれ対向する下継手第二鉛直面１２４、上継手第一鉛直面１１３に当接することで、上継手構造１１と下継手構造１２との隙間を確保する。 (3) Engagement of Joint Structures Adjacent bodies 2a, 2b engage respective upper and lower joint structures 11 and 12 (Fig. 3).
The upper protruding muscle 311 of the upper joint structure 11 fits in the upper protruding muscle storage part 126 of the lower joint structure 12 , and the lower protruding muscle 321 of the lower joint structure 12 fits in the lower protruding muscle storage part 116 of the upper joint structure 11 .
At the end of the lower surface 22a of the main body 2a on which the upper joint structure 11 is provided, a lower notch 23a is provided which is continuous with the lower protruding muscle storage portion 116 and accommodates the tip of the lower protruding muscle 321, the lower fixing plate 322 and the lower nut 323. . At the end of the upper surface 21b of the main body 2b on which the lower joint structure 12 is provided, an upper notch 23b that is continuous with the upper protruding muscle storage portion 126 and accommodates the tip of the upper protruding muscle 311, the upper fixing plate 312 and the upper nut 313 is provided. set up.
By tightening the upper nut 313 and the lower nut 323, the upper fixing plate 312 and the lower fixing plate 322 are pressed against the ends of the upper protruding muscle storage portion 126 and the lower protruding muscle storage portion 116, thereby The structures 12 are drawn together and come together. In addition, a filling port 24 penetrating to the upper surface 21a is provided in the lower cutout 23a of the main body 2a. The lower notch 23 a and the filling port 24 may be provided in the upper joint structure 11 and the upper notch 23 b may be provided in the lower joint structure 12 . At this time, the projection lengths of the upper protruding muscles 311 and the lower protruding muscles 321 need not be longer than the lower joint upper surface 121 of the lower joint structure 12 and the upper joint lower surface 112 of the upper joint structure 11 .
The inserts 117, 127 adjust the protruding lengths and contact the lower joint second vertical surface 124 and the upper joint first vertical surface 113, respectively, to close the gap between the upper joint structure 11 and the lower joint structure 12. Secure.

（４）ボルトによる連結
上継手構造１１の上継手上面１１１には、中空のボルトボックス４を設け、ボルトボックス４の内側面にはボルト孔４１を設ける（図４）。
ボルト孔４１には、ボルト４２を挿通し、下継手構造１２の下継手傾斜面１２５にボルト孔４１に対応して埋設したアンカーナット４３にボルト４２を螺合して、隣り合う上継手構造１１と下継手構造１２を連結する。
ボルト４２の軸の太さに対してボルト孔４１の寸法に余裕を持たせることで、現地での寸法誤差を吸収してボルト４２をアンカーナット４３に螺合することができる。
ボルト孔４１とアンカーナット４３は下継手傾斜面１２５に対して略直交するように設けることが製作上は好適である。
また、ボルト孔４１とアンカーナット４３を下継手傾斜面１２５の中央で上継手上面１１１に対して直交する方向に設けることにより、ボルト孔４１が鉛直に配置され、施工性が向上する（図５）。
ボルトボックス４には、モルタル等の間詰材５を充填する。 (4) Connection by bolts A hollow bolt box 4 is provided on the upper joint upper surface 111 of the upper joint structure 11, and a bolt hole 41 is provided on the inner surface of the bolt box 4 (Fig. 4).
A bolt 42 is inserted through the bolt hole 41 and screwed into an anchor nut 43 embedded in the lower joint inclined surface 125 of the lower joint structure 12 so as to correspond to the bolt hole 41 . and the lower joint structure 12 are connected.
By making the dimension of the bolt hole 41 larger than the thickness of the shaft of the bolt 42 , the bolt 42 can be screwed into the anchor nut 43 while absorbing dimensional errors on site.
It is preferable in manufacturing that the bolt hole 41 and the anchor nut 43 are provided so as to be substantially orthogonal to the lower joint inclined surface 125 .
In addition, by providing the bolt hole 41 and the anchor nut 43 in the direction perpendicular to the upper joint upper surface 111 at the center of the lower joint inclined surface 125, the bolt hole 41 is arranged vertically and the workability is improved (Fig. 5). ).
The bolt box 4 is filled with a filling material 5 such as mortar.

（５）間詰材
隣り合う上継手構造１１と下継手構造１２との隙間や下突出筋格納部１１６、上突出筋格納部１２６、下切り欠き２３ａ、及び上切り欠き２３ｂにはモルタルや接着剤等の間詰材５を充填する。 (5) Filling material Mortar or adhesive is applied to the gap between the adjacent upper joint structure 11 and lower joint structure 12, the lower protruding muscle storage part 116, the upper protruding muscle storage part 126, the lower notch 23a, and the upper notch 23b. Filling material 5 such as agent is filled.

（６）応力伝達
右側の本体２ａに輪荷重が載荷されている場合、上継手構造１１の上継手第一鉛直面１１３と下継手構造１２の下継手第一鉛直面１２３の間には圧縮力が作用し、この圧縮力は間詰材５、上突出筋３１１、及びインサート１２７により下継手構造１２を介して左側の本体２ｂに伝達される。また、上継手傾斜面１１５と下継手傾斜面１２５との間に作用する圧縮力は間詰材５とボルト４２によって、上継手第二鉛直面１１４と下継手第二鉛直面１２４の間に作用する引張力は間詰材５と下突出筋３２１によって、それぞれ下継手構造１２を介して左側の本体２ｂに伝達される（図６（ａ））。
左側の本体２ｂに輪荷重が載荷されている場合、上述の場合と異なり上継手傾斜面１１５と下継手傾斜面１２５との間には引張力が作用するが、同様に間詰材５とボルト４２によって上継手構造１１を介して右側の本体２ｂに伝達される（図６（ｂ））。
この他、輪荷重の載荷位置によって、上継手第一鉛直面１１３と下継手第一鉛直面１２３の間に引張力が作用し、上継手第二鉛直面１１４と下継手第二鉛直面１２４の間に圧縮力が作用する場合には、上継手第一鉛直面１１３と下継手第一鉛直面１２３の間に作用する引張力は間詰材５と上突出筋３１１によって、上継手第二鉛直面１１４と下継手第二鉛直面１２４の間に作用する圧縮力は、間詰材５、下突出筋３２１及びインサート１１７によって、それぞれ隣り合う本体２ａ（２ｂ）に伝達される。
なお、継手構造１のせん断強度、上突出筋３１１、下突出筋３２１のせん断強度、インサート１１７、１２７の圧縮強度及び間詰材５の接着強度の合計が、輪荷重の載荷により発生する断面力よりも大きい場合には、ボルト４２を省略することができる。ボルト４２を省略することにより、ボルトボックス４も省略でき、ボルトボックス４に間詰材５を充填する作業も省略できる。このとき、上継手構造１１と下継手構造１２は同一の形態の継手となり、天地を入れ替えるだけで上継手構造１１と下継手構造１２を使い分けることができる。 (6) Stress transmission When a wheel load is applied to the right main body 2a, there is a compressive force between the upper joint first vertical surface 113 of the upper joint structure 11 and the lower joint first vertical surface 123 of the lower joint structure 12. acts, and this compressive force is transmitted to the left main body 2b through the lower joint structure 12 by the filler 5, the upper protruding muscle 311, and the insert 127. As shown in FIG. Also, the compressive force acting between the upper joint inclined surface 115 and the lower joint inclined surface 125 acts between the upper joint second vertical surface 114 and the lower joint second vertical surface 124 by the filler 5 and the bolt 42. This tensile force is transmitted to the left main body 2b through the lower joint structure 12 by the filler material 5 and the lower protruding muscle 321 (FIG. 6(a)).
When a wheel load is applied to the left main body 2b, a tensile force acts between the upper joint inclined surface 115 and the lower joint inclined surface 125 unlike the case described above. 42 to the right main body 2b through the upper joint structure 11 (FIG. 6(b)).
In addition, depending on the loading position of the wheel load, a tensile force acts between the upper joint first vertical surface 113 and the lower joint first vertical surface 123, and the upper joint second vertical surface 114 and the lower joint second vertical surface 124 When a compressive force acts between the upper joint first vertical surface 113 and the lower joint first vertical surface 123, the tensile force acting between the upper joint first vertical surface 113 and the lower joint first vertical surface 123 is applied to the upper joint second vertical surface by the filler material 5 and the upper protruding muscle 311. The compressive force acting between the surface 114 and the lower joint second vertical surface 124 is transmitted to the adjacent body 2a (2b) by the filler material 5, the lower protruding muscle 321 and the insert 117, respectively.
The sum of the shear strength of the joint structure 1, the shear strength of the upper protruding muscles 311 and the lower protruding muscles 321, the compressive strength of the inserts 117 and 127, and the adhesive strength of the filler 5 is the cross-sectional force generated by the loading of the wheel load. , the bolt 42 can be omitted. By omitting the bolts 42, the bolt box 4 can also be omitted, and the work of filling the bolt box 4 with the filler material 5 can also be omitted. At this time, the upper joint structure 11 and the lower joint structure 12 are joints of the same form, and the upper joint structure 11 and the lower joint structure 12 can be selectively used simply by changing the top and bottom.

（７）施工方法
次に、本体２どうしを接続して床スラブを構成する、プレキャストコンクリート版の施工方法を説明する。 (7) Construction Method Next, a construction method for precast concrete slabs that connect the main bodies 2 to form a floor slab will be described.

（７．１）吊り降ろし
クレーン等により吊り上げた本体２ａの上継手構造１１が隣り合う本体２ｂの下継手構造１２と干渉せず、上突出筋３１１、下突出筋３２１が上突出筋格納部１２６、下突出筋格納部１１６に収まるように吊り降ろす（図７）。このとき、上継手構造１１と下継手構造１２の間には若干の隙間（１０～３０ｍｍ）を設けておく。そして、隙間に合わせてインサート１１７、１２７の突出長さを調整し、それぞれ対向する下継手第二鉛直面１２４、上継手第一鉛直面１１３に当接する。隙間に合わせてインサート１１７、１２７の突出長さを調整するため、現地での寸法誤差を吸収することができる。
また、従来必要であった補強筋の配筋作業が不要となる。 (7.1) Lifting The upper joint structure 11 of the main body 2a lifted by a crane or the like does not interfere with the lower joint structure 12 of the adjacent main body 2b, and the upper protruding muscle 311 and the lower protruding muscle 321 are placed in the upper protruding muscle storage part 126. , so as to fit in the lower protruding muscle storage part 116 (FIG. 7). At this time, a slight gap (10 to 30 mm) is provided between the upper joint structure 11 and the lower joint structure 12 . Then, the protruding lengths of the inserts 117 and 127 are adjusted according to the gap, and the inserts 117 and 127 come into contact with the opposing lower joint second vertical surface 124 and upper joint first vertical surface 113, respectively. Since the projection lengths of the inserts 117 and 127 are adjusted according to the clearance, dimensional errors on site can be absorbed.
In addition, the work of arranging reinforcing bars, which has been necessary in the past, is no longer necessary.

（７．２）ボルトの螺合
ボルトボックス４のボルト孔４１からボルト４２を挿入し、アンカーナット４３に螺合する（図８）。ボルト４２の軸の太さに対してボルト孔４１の寸法に余裕を持たせることで、現地での寸法誤差を吸収してボルト４２をアンカーナット４３に容易に螺合することができる。 (7.2) Screwing of bolt A bolt 42 is inserted through the bolt hole 41 of the bolt box 4 and screwed onto the anchor nut 43 (Fig. 8). By providing a margin in the dimension of the bolt hole 41 with respect to the thickness of the shaft of the bolt 42, the dimensional error at the site can be absorbed and the bolt 42 can be easily screwed into the anchor nut 43. - 特許庁

（７．３）突出筋の緊張
コンクリート床版２ｂの上切り欠き２３ｂに収まった上突出筋３１１の先端の上ナット３１３を締め込み、上定着板３１２を上突出筋格納部１２６の端部に押し付けると共に、コンクリート床版２ａの下切り欠き２３ａに収まった下突出筋３２１の先端の下ナット３２３を締め込み、下定着板３２２を下突出筋格納部１１６の端部に押し付けることで、上突出筋３１１、下突出筋３２１が緊張し、上継手構造１１と下継手構造１２が互いを引き寄せて一体となる。
現地で上ナット３１３、下ナット３２３を締め込むため、現地での寸法誤差を吸収することができる。 (7.3) Tension of Protruding Muscle Tighten the upper nut 313 at the tip of the upper protruding muscle 311 fitted in the upper notch 23b of the concrete floor slab 2b, and attach the upper fixing plate 312 to the end of the upper protruding muscle storage portion 126. While pressing, the lower nut 323 at the tip of the lower protruding muscle 321 fitted in the lower notch 23a of the concrete floor slab 2a is tightened, and the lower fixing plate 322 is pressed against the end of the lower protruding muscle storage part 116, thereby protruding upward. The muscle 311 and the lower protruding muscle 321 are tensed, and the upper joint structure 11 and the lower joint structure 12 are pulled together and integrated.
Since the upper nut 313 and the lower nut 323 are tightened on site, dimensional errors on site can be absorbed.

ここまでの工程で、上継手構造１１と下継手構造２１は、上突出筋３１１、下突出筋３２１及びボルト４２により一体となっており、それぞれの本体２ａ、２ｂの荷重は、上突出筋３１１、下突出筋３２１、ボルト４２及びインサート１１７、１２７により他方の本体２ａ、２ｂに伝達される。
このため、この後の工程で充填する間詰材５には変形や振動の影響が及ばない。よって、道路を片側供用し、道路の幅員方向の部分的に床版を取り替える場合であっても、接合部の間詰材５の品質が確保できるため、全面通行止めは不要となる。 In the steps up to this point, the upper joint structure 11 and the lower joint structure 21 are integrated by the upper protruding muscle 311, the lower protruding muscle 321, and the bolt 42, and the load of each main body 2a, 2b is applied to the upper protruding muscle 311. , lower protruding muscles 321, bolts 42 and inserts 117, 127 to the other body 2a, 2b.
Therefore, the filler material 5 to be filled in the subsequent steps is not affected by deformation or vibration. Therefore, even when one side of the road is used and the floor slabs are partially replaced in the width direction of the road, the quality of the filler material 5 at the joint can be ensured, and the entire road closure is unnecessary.

（７．４）間詰材の充填
上継手構造１１と下継手構造１２との隙間、ボルトボックス４、下突出筋格納部１１６、上突出筋格納部１２６、下切り欠き２３ａ、及び上切り欠き２３ｂに、間詰材５を充填する（図９）。
上継手構造１１と下継手構造１２との隙間の下部、上継手構造１１の下側に位置する下突出筋格納部１１６及び本体２ａの下面２２ａ側の下切り欠き２３ａは、側面型枠（図示せず）によって両側端の開口を、底面型枠６によって下側の開口をそれぞれ塞ぎ、充填口２４から間詰材５を流し込むことで、上継手構造１１と下継手構造１２との隙間、下突出筋格納部１１６、上突出筋格納部１２６、下切り欠き２３ａ、及び上切り欠き２３ｂに、間詰材５を充填することができる。
従来の継手より型枠規模が小さくなるため、型枠の設置や解体等の現場作業が簡略化され、現場での作業性が向上する。
また、間詰材５は、上継手構造１１と下継手構造１２との隙間、ボルトボックス４、下突出筋格納部１１６、上突出筋格納部１２６、下切り欠き２３ａ、及び上切り欠き２３ｂにのみ充填するため、従来の間詰めコンクリートや、高強度な繊維補強コンクリートに比べて大幅に削減することができ、現場での作業性が向上する。
間詰材５の充填は、充填しやすい材料を選択し、圧力を加えることで本体２の下面２２側からも行うことができる。プレキャストコンクリート床版の更新工事は使用中の橋梁等に交通規制をかけて作業することが多く、プレキャストコンクリート床版の上面での作業は通行車両による事故のリスクがある。しかし、下面から作業を行うことで、作業の安全性が向上する。下面側から充填を行う場合には、充填口２４は不要となる。 (7.4) Filling of filling material Gap between upper joint structure 11 and lower joint structure 12, bolt box 4, lower protruding muscle storage part 116, upper protruding muscle storage part 126, lower notch 23a, and upper notch 23b is filled with the filler material 5 (Fig. 9).
The lower part of the gap between the upper joint structure 11 and the lower joint structure 12, the lower protruding muscle storage part 116 located on the lower side of the upper joint structure 11, and the lower notch 23a on the lower surface 22a side of the main body 2a are formed by the side mold (Fig. (not shown) closes the openings on both sides with the bottom mold 6, and the lower opening is closed with the bottom mold 6, and the filling material 5 is poured in from the filling port 24 to fill the gap between the upper joint structure 11 and the lower joint structure 12, the lower The filling material 5 can be filled in the protrusive muscle storage part 116, the upper protrusive muscle storage part 126, the lower notch 23a, and the upper notch 23b.
Since the scale of the formwork is smaller than that of conventional joints, on-site work such as installation and dismantling of the formwork is simplified, improving on-site workability.
In addition, the filling material 5 is applied to the gap between the upper joint structure 11 and the lower joint structure 12, the bolt box 4, the lower protruding muscle storage portion 116, the upper protruding muscle storage portion 126, the lower cutout 23a, and the upper cutout 23b. Since it is only filled, it can be significantly reduced compared to conventional interfilling concrete and high-strength fiber reinforced concrete, and workability at the site is improved.
Filling of the filling material 5 can be performed also from the lower surface 22 side of the main body 2 by selecting a material that is easy to fill and applying pressure. Renewal work of precast concrete floor slabs is often carried out under traffic restrictions on bridges that are in use, and work on the upper surface of precast concrete slabs carries the risk of accidents caused by passing vehicles. However, working from the bottom surface improves work safety. When filling from the lower surface side, the filling port 24 is not required.

［実施例２］下継手構造へのボルトボックスの形成
実施例１において、上継手構造１１にボルトボックス４を形成し、ボルト４２を下継手構造１２に設けたアンカーナット４３に螺合したが、アンカーナット４３に代えて、下継手構造１２にもボルトボックス４及びボルト孔４１を設けて、ボルト４２にナット４４を螺合してもよい（図１０）。
上継手構造１１、下継手構造１２の両方にボルトボックス４を設けることで、上継手構造１１と下継手構造１２は同一の形態の継手となり、天地を入れ替えるだけで上継手構造１１と下継手構造１２を使い分けることができる。
また、上継手構造１１、下継手構造１２の両方にボルト孔４１を有するが、いずれのボルト孔４１もボルト４２の軸の太さに対して寸法に余裕を設けることで、より多くの寸法誤差を吸収することができる。
ボルト４２は、上継手構造１１のボルト孔４１から挿入してもよいし、下継手構造１２のボルト孔４１から挿入してもよい。 [Embodiment 2] Formation of bolt box in lower joint structure Instead of the anchor nut 43, the lower joint structure 12 may also be provided with the bolt box 4 and the bolt hole 41, and the nut 44 may be screwed onto the bolt 42 (Fig. 10).
By providing the bolt box 4 in both the upper joint structure 11 and the lower joint structure 12, the upper joint structure 11 and the lower joint structure 12 become joints of the same form, and the upper joint structure 11 and the lower joint structure can be formed simply by exchanging the top and bottom. 12 can be used properly.
In addition, both the upper joint structure 11 and the lower joint structure 12 have bolt holes 41, but by providing a dimensional margin for the thickness of the shaft of the bolt 42 in each of the bolt holes 41, more dimensional errors can be achieved. can be absorbed.
The bolt 42 may be inserted through the bolt hole 41 of the upper joint structure 11 or through the bolt hole 41 of the lower joint structure 12 .

［実施例３］壁高欄の施工
実施例１において、本体２の橋軸直角方向の端部表面に、壁高欄の鉄筋を設けておくことで、現場での鉄筋組立作業が省略できる。また、プレキャストコンクリート製壁高欄の接続部を設けておくことで、プレキャストコンクリート製の壁高欄を容易に設置することができる。もしくは、本体２の橋軸直角方向の端部に壁高欄を設けた一体の本体２としてもよい。 [Embodiment 3] Construction of wall balustrade In embodiment 1, by providing reinforcing bars for wall balustrades on the end surface of the main body 2 in the direction perpendicular to the bridge axis, on-site reinforcing bar assembly work can be omitted. In addition, by providing the connecting portion of the precast concrete balustrade, the precast concrete balustrade can be easily installed. Alternatively, the main body 2 may be integrated with a balustrade provided at the end of the main body 2 in the direction perpendicular to the bridge axis.

［実施例４］プレキャストコンクリート版への適用
上述の実施例においては、本発明の継手構造１はプレキャストコンクリート床版に適用したが、これに限定されず、例えば高さ方向や幅方向に連なるコンクリート壁版どうしの連結に適用することもできる。 [Example 4] Application to precast concrete slabs In the above-described examples, the joint structure 1 of the present invention was applied to precast concrete floor slabs, but is not limited to this. It can also be applied to the connection of wall plates.

１ 継手構造
１１ 上継手構造、１１１ 上継手上面、１１２ 上継手下面、１１３ 上継手第一鉛直面、１１４ 上継手第二鉛直面、１１５ 上継手傾斜面、１１６ 下突出筋格納部、１１７ インサート
１２ 下継手構造、１２１ 下継手上面、１２２ 下継手下面、１２３ 下継手第一鉛直面、１２４ 下継手第二鉛直面、１２５ 下継手傾斜面、１２６ 上突出筋格納部、１２７ インサート
２ 本体
２１ 上面、２２ 下面、２３ａ 下切り欠き、２３ｂ 上切り欠き、２４ 充填口
３１１ 上突出筋、３１２ 上定着板、３１３ 上ナット
３２１ 下突出筋、３２２ 下定着板、３２３ 下ナット
ボルトボックス４
４１ ボルト孔、４２ ボルト、４３ アンカーナット、４４ ナット
５ 間詰材
６ 底面型枠 1 joint structure 11 upper joint structure 111 upper joint upper surface 112 upper joint lower surface 113 upper joint first vertical surface 114 upper joint second vertical surface 115 upper joint inclined surface 116 lower protruding muscle storage portion 117 insert 12 Lower joint structure, 121 lower joint upper surface, 122 lower joint lower surface, 123 lower joint first vertical surface, 124 lower joint second vertical surface, 125 lower joint inclined surface, 126 upper protruding muscle storage part, 127 insert 2 main body 21 upper surface, 22 lower surface, 23a lower notch, 23b upper notch, 24 filling port 311 upper protruding bar, 312 upper fixing plate, 313 upper nut 321 lower protruding bar, 322 lower fixing plate, 323 lower nut bolt box 4
41 bolt hole, 42 bolt, 43 anchor nut, 44 nut 5 filling material 6 bottom formwork

本発明は、プレキャストコンクリート版に関し、より具体的には、端面に接合部を有するプレキャストコンクリート版に関する。
TECHNICAL FIELD The present invention relates to a precast concrete slab, and more particularly to a precast concrete slab having joints on its end faces.

本発明は、現場での作業性を向上するとともに、変形や振動の影響下においても接合部の品質を確保することができる、プレキャストコンクリート版及びその施工方法を提供することを目的とする。
SUMMARY OF THE INVENTION An object of the present invention is to provide a precast concrete slab and a construction method thereof that can improve workability on site and ensure the quality of joints even under the influence of deformation and vibration.

上記目的を達成するためになされた本願の第一発明は、本体と、前記本体の周面の少なくとも一部に設けた継手構造と、を有し、前記継手構造は、上継手上面と、前記本体からの突出長さが前記上継手上面より短い上継手下面と、前記上継手上面の端部から鉛直下方に延びる上継手第一鉛直面と、前記上継手下面の端部から鉛直上方に延びる上継手第二鉛直面と、前記上継手第一鉛直面の下端と前記上継手第二鉛直面の上端を結ぶ上継手傾斜面と、前記上継手第一鉛直面に突設する上突出筋と、を有する、上継手構造及び／又は、下継手上面と、前記本体からの突出長さが前記下継手上面より長い下継手下面と、前記下継手上面の端部から鉛直下方に延びる下継手第一鉛直面と、前記下継手下面の端部から鉛直上方に延びる下継手第二鉛直面と、前記下継手第一鉛直面の下端と前記下継手第二鉛直面の上端を結ぶ下継手傾斜面と、前記下継手第二鉛直面に突設する下突出筋とを有する、下継手構造を有し、前記本体の対向する前記周面において、一方が前記上継手構造のとき、他方を前記下継手構造により構成し、前記上突出筋と、前記下突出筋とは、いずれも、先端が雄ネジ状であり、前記上突出筋、前記下突出筋に挿通する上定着板、下定着板と、前記上突出筋、前記下突出筋の先端に螺合する上ナット、下ナットと、を有し、前記上継手下面は、前記下突出筋を収容可能な下突出筋格納部を有し、前記下継手上面は、前記上突出筋を収容可能な上突出筋格納部を有し、前記上継手第一鉛直面又は前記上継手第二鉛直面と、前記下継手第一鉛直面又は前記下継手第二鉛直面とは、突設長が調整可能なインサートを有し、前記上継手構造を有する前記本体の下面又は前記上継手下面に、前記下突出筋格納部の前記本体側の端部と連続し、前記下定着板と前記下ナットを収める下切り欠きを有し、前記下継手構造を有する前記本体の上面又は前記下継手上面に、前記上突出筋格納部の前記本体側の端部と連続し、前記上定着板と前記上ナットを収める上切り欠きを有する、プレキャストコンクリート版を提供する。
本願の第二発明は、第一発明において、前記上継手構造は、前記上継手上面又は前記本体の上面から前記下切り欠き又は前記下突出筋格納部まで貫通する充填口を有することを特徴とする。
本願の第三発明は、第一発明又は第二発明において、前記上継手上面は、内側面にボルト孔を有するボルトボックスを有し、前記下継手傾斜面は、前記ボルト孔に対応するアンカーナットを有することを特徴とする。
本願の第四発明は、第一発明又は第二発明において、前記上継手上面と前記下継手下面とは、内側面にボルト孔を有するボルトボックスを有することを特徴とする。
本願の第五発明は、第一発明又は第二発明のプレキャストコンクリート版どうしを接続して床スラブを構成する、プレキャストコンクリート版の施工方法であって、前記上継手構造を有するプレキャストコンクリート版を吊り上げ、既に設置した、前記下継手構造を有するプレキャストコンクリート版の前記上突出筋格納部と前記上切り欠きに、前記上突出筋と前記上定着板及び前記上ナットが収まり、前記上継手構造を有するプレキャストコンクリート版の前記下突出筋格納部と前記下切り欠きに、前記下突出筋と前記下定着板及び前記下ナットが収まるように、前記上継手構造と前記下継手構造との間に所定の隙間を設けて吊り降ろし、前記上継手構造の前記インサートと前記下継手構造の前記インサートの突出長さを調整し、それぞれ対向する前記下継手第一鉛直面又は前記下継手第二鉛直面及び前記上継手第一鉛直面又は前記上継手第二鉛直面に当接し、前記上突出筋の先端の前記上ナットと、前記下突出筋の前記下ナットと、を締め込み、前記上定着板及び前記下定着板を前記上突出筋格納部の端部及び前記下突出筋格納部の端部に押し付けて前記上突出筋及び前記下突出筋を緊張し、前記隙間、前記上突出筋格納部、前記下突出筋格納部、前記上切り欠き及び前記下切り欠きに間詰材を充填することを特徴とする、プレキャストコンクリート版の施工方法を提供する。
本願の第六発明は、第三発明のプレキャストコンクリート版どうしを接続して床スラブを構成する、プレキャストコンクリート版の施工方法であって、前記上継手構造を有するプレキャストコンクリート版を吊り上げ、既に設置した、前記下継手構造を有するプレキャストコンクリート版の前記上突出筋格納部と前記上切り欠きに、前記上突出筋と前記上定着板及び前記上ナットが収まり、前記上継手構造を有するプレキャストコンクリート版の前記下突出筋格納部と前記下切り欠きに、前記下突出筋と前記下定着板及び前記下ナットが収まるように、前記上継手構造と前記下継手構造との間に所定の隙間を設けて吊り降ろし、前記上継手構造の前記インサートと前記下継手構造の前記インサートの突出長さを調整し、それぞれ対向する前記下継手第一鉛直面又は前記下継手第二鉛直面及び前記上継手第一鉛直面又は前記上継手第二鉛直面に当接し、前記上継手構造の前記ボルトボックスの前記ボルト孔にボルトを挿入し、前記下継手構造の前記アンカーナットに前記ボルトを螺合し、前記上突出筋の先端の前記上ナットと、前記下突出筋の前記下ナットと、を締め込み、前記上定着板及び前記下定着板を前記上突出筋格納部の端部及び前記下突出筋格納部の端部に押し付けて前記上突出筋及び前記下突出筋を緊張し、前記隙間、前記上突出筋格納部、前記下突出筋格納部、前記上切り欠き、前記下切り欠き及び前記ボルトボックスに間詰材を充填することを特徴とする、プレキャストコンクリート版の施工方法を提供する。
本願の第七発明は、第四発明のプレキャストコンクリート版どうしを接続して床スラブを構成する、プレキャストコンクリート版の施工方法であって、前記上継手構造を有するプレキャストコンクリート版を吊り上げ、既に設置した、前記下継手構造を有するプレキャストコンクリート版の前記上突出筋格納部と前記上切り欠きに、前記上突出筋と前記上定着板及び前記上ナットが収まり、前記上継手構造を有するプレキャストコンクリート版の前記下突出筋格納部と前記下切り欠きに、前記下突出筋と前記下定着板及び前記下ナットが収まるように、前記上継手構造と前記下継手構造との間に所定の隙間を設けて吊り降ろし、前記上継手構造の前記インサートと前記下継手構造の前記インサートの突出長さを調整し、それぞれ対向する前記下継手第一鉛直面又は前記下継手第二鉛直面及び前記上継手第一鉛直面又は前記上継手第二鉛直面に当接し、前記上継手構造又は前記下継手構造のいずれか一方の前記ボルトボックスの前記ボルト孔にボルトを挿入して他方の前記ボルトボックスの前記ボルト孔を貫通させ、他方の前記ボルトボックス内で前記ボルトにナットを螺合し、前記上突出筋の先端の前記上ナットと、前記下突出筋の前記下ナットと、を締め込み、前記上定着板及び前記下定着板を前記上突出筋格納部の端部及び前記下突出筋格納部の端部に押し付けて前記上突出筋及び前記下突出筋を緊張し、前記隙間、前記上突出筋格納部、前記下突出筋格納部、前記上切り欠き、前記下切り欠き及び前記ボルトボックスに間詰材を充填することを特徴とする、プレキャストコンクリート版の施工方法を提供する。
本願の第八発明は、第五発明乃至第七発明のいずれかにおいて、前記隙間、前記上突出筋格納部、前記下突出筋格納部、前記上切り欠き及び前記下切り欠きへの前記間詰材の充填は、前記プレキャストコンクリート版の下面側から行うことを特徴とする。
A first invention of the present application, which has been made to achieve the above object, has a main body and a joint structure provided on at least a part of the peripheral surface of the main body, and the joint structure includes an upper joint upper surface and the An upper joint lower surface protruding from the main body shorter than the upper joint upper surface, an upper joint first vertical surface extending vertically downward from an end of the upper joint upper surface, and an upper joint extending vertically upward from an end of the upper joint lower surface. An upper joint second vertical surface, an upper joint inclined surface connecting the lower end of the upper joint first vertical surface and the upper end of the upper joint second vertical surface, and an upper protruding muscle protruding from the upper joint first vertical surface an upper joint structure and/or a lower joint upper surface, a lower joint lower surface protruding from the main body longer than the lower joint upper surface, and a lower joint upper surface extending vertically downward from an end of the lower joint upper surface. one vertical surface, a second vertical surface of the lower joint extending vertically upward from the end of the lower surface of the lower joint, and an inclined surface of the lower joint connecting the lower end of the first vertical surface of the lower joint and the upper end of the second vertical surface of the lower joint. and a lower protruding muscle protruding on the second vertical surface of the lower joint, and when one of the opposing peripheral surfaces of the main body is the upper joint structure, the other is the lower Each of the upper protruding muscle and the lower protruding muscle has a male threaded tip, and an upper fixing plate and a lower fixing plate are inserted through the upper protruding muscle and the lower protruding muscle. , an upper nut and a lower nut that are screwed to the tips of the upper protruding muscle and the lower protruding muscle, and the lower surface of the upper joint has a lower protruding muscle storage portion that can accommodate the lower protruding muscle, The lower joint upper surface has an upper protruding muscle storage portion capable of accommodating the upper protruding muscle, and the upper joint first vertical surface or the upper joint second vertical surface and the lower joint first vertical surface or the lower The second vertical surface of the joint has an insert whose projection length is adjustable, and is attached to the lower surface of the main body having the upper joint structure or the lower surface of the upper joint, the end portion of the lower protruding muscle storage portion on the main body side. and a lower notch for accommodating the lower fixing plate and the lower nut, and an end of the upper protruding muscle storage portion on the main body side on the upper surface of the main body having the lower joint structure or on the upper surface of the lower joint A precast concrete slab is provided which has an upper notch which is continuous with a part and accommodates the upper fixing plate and the upper nut.
A second invention of the present application is characterized in that, in the first invention, the upper joint structure has a filling port penetrating from the upper surface of the upper joint or the upper surface of the main body to the lower notch or the lower protruding muscle storage portion. do.
The third invention of the present application is the first invention or the second invention, wherein the upper joint top surface has a bolt box having a bolt hole on the inner side surface, and the lower joint inclined surface has an anchor nut corresponding to the bolt hole. characterized by having
A fourth invention of the present application is characterized in that, in the first invention or the second invention, the upper joint upper surface and the lower joint lower surface have a bolt box having a bolt hole on an inner surface thereof.
The fifth invention of the present application is a method for constructing a precast concrete slab by connecting the precast concrete slabs of the first invention or the second invention to form a floor slab, wherein the precast concrete slabs having the upper joint structure are lifted. , the upper protruding muscle, the upper fixing plate, and the upper nut are accommodated in the upper protruding muscle storage portion and the upper notch of the precast concrete slab having the lower joint structure, which has already been installed, and the upper joint structure is provided. A predetermined gap is formed between the upper joint structure and the lower joint structure so that the lower protruding bar, the lower fixing plate, and the lower nut are accommodated in the lower protruding bar storage portion and the lower notch of the precast concrete slab. Suspending with a gap, adjusting the projection length of the insert of the upper joint structure and the insert of the lower joint structure, the lower joint first vertical surface or the lower joint second vertical surface and the abut on the first vertical surface of the upper joint or the second vertical surface of the upper joint, tighten the upper nut on the tip of the upper protruding muscle and the lower nut on the lower protruding muscle, and tighten the upper fixing plate and the upper fixing plate; A lower fixing plate is pressed against the end of the upper protruding muscle storage part and the end of the lower protruding muscle storage part to tense the upper protruding muscle and the lower protruding muscle, thereby tightening the gap, the upper protruding muscle storage part, and the upper protruding muscle storage part. Provided is a method for constructing a precast concrete slab, characterized in that the lower protruding muscle storage portion, the upper notch, and the lower notch are filled with filler material.
The sixth invention of the present application is a method of constructing a precast concrete slab by connecting the precast concrete slabs of the third invention to form a floor slab, wherein the precast concrete slabs having the upper joint structure are lifted and have already been installed. , the upper protruding bar, the upper fixing plate and the upper nut are accommodated in the upper protruding bar storage portion and the upper notch of the precast concrete slab having the lower joint structure, and the precast concrete slab having the upper joint structure. A predetermined gap is provided between the upper joint structure and the lower joint structure so that the lower protruding muscle, the lower fixing plate, and the lower nut can be accommodated in the lower protruding muscle storage portion and the lower notch. lowering, adjusting the protruding length of the insert of the upper joint structure and the insert of the lower joint structure, and respectively facing the lower joint first vertical surface or the lower joint second vertical surface and the upper joint first Abut on the vertical surface or the second vertical surface of the upper joint, insert a bolt into the bolt hole of the bolt box of the upper joint structure, screw the bolt into the anchor nut of the lower joint structure, and The upper nut on the tip of the protruding muscle and the lower nut on the lower protruding muscle are tightened, and the upper fixing plate and the lower fixing plate are attached to the ends of the upper protruding muscle storage part and the lower protruding muscle storage part. to tighten the upper protruding muscle and the lower protruding muscle, and to the gap, the upper protruding muscle storage part, the lower protruding muscle storage part, the upper notch, the lower notch and the bolt box To provide a method for constructing a precast concrete slab, characterized by filling a filler material.
The seventh invention of the present application is a method of constructing a precast concrete slab by connecting the precast concrete slabs of the fourth invention to form a floor slab, wherein the precast concrete slabs having the upper joint structure are lifted and already installed. , the upper protruding bar, the upper fixing plate and the upper nut are accommodated in the upper protruding bar storage portion and the upper notch of the precast concrete slab having the lower joint structure, and the precast concrete slab having the upper joint structure. A predetermined gap is provided between the upper joint structure and the lower joint structure so that the lower protruding muscle, the lower fixing plate, and the lower nut can be accommodated in the lower protruding muscle storage portion and the lower notch. lowering, adjusting the protruding length of the insert of the upper joint structure and the insert of the lower joint structure, and respectively facing the lower joint first vertical surface or the lower joint second vertical surface and the upper joint first Abutting on the vertical surface or the second vertical surface of the upper joint, inserting a bolt into the bolt hole of the bolt box of either the upper joint structure or the lower joint structure, and inserting the bolt into the bolt hole of the other bolt box and a nut is screwed onto the bolt in the other bolt box, the upper nut on the tip of the upper protruding muscle and the lower nut on the lower protruding muscle are tightened, and the upper fixing plate and pressing the lower fixing plate against the end portion of the upper protruding muscle storage portion and the end portion of the lower protruding muscle storage portion to tense the upper protruding muscle and the lower protruding muscle to tighten the gap and the upper protruding muscle storage portion. , the lower protruding muscle storage part, the upper notch, the lower notch and the bolt box are filled with filler material.
The eighth invention of the present application is the filling of the gap, the upper protruding muscle storage part, the lower protruding muscle storage part, the upper notch and the lower notch in any one of the fifth to seventh inventions. Filling of the material is performed from the lower surface side of the precast concrete slab .

Claims (10)

本体と、
前記本体の周面の少なくとも一部に設けた継手構造と、を有し、
前記継手構造は、
上継手上面と、前記本体からの突出長さが前記上継手上面より短い上継手下面と、前記上継手上面の端部から鉛直下方に延びる上継手第一鉛直面と、前記上継手下面の端部から鉛直上方に延びる上継手第二鉛直面と、前記上継手第一鉛直面の下端と前記上継手第二鉛直面の上端を結ぶ上継手傾斜面と、前記上継手第一鉛直面に突設する上突出筋と、を有する、上継手構造及び／又は、
下継手上面と、前記本体からの突出長さが前記下継手上面より長い下継手下面と、前記下継手上面の端部から鉛直下方に延びる下継手第一鉛直面と、前記下継手下面の端部から鉛直上方に延びる下継手第二鉛直面と、前記下継手第一鉛直面の下端と前記下継手第二鉛直面の上端を結ぶ下継手傾斜面と、前記下継手第二鉛直面に突設する下突出筋とを有する、下継手構造を有し、
前記上突出筋と、前記下突出筋とは、いずれも、先端が雄ネジ状であり、前記上突出筋、前記下突出筋に挿通する上定着板、下定着板と、前記上突出筋、前記下突出筋の先端に螺合する上ナット、下ナットと、を有し、
前記上継手下面は、前記下突出筋を収容可能な下突出筋格納部を有し、
前記下継手上面は、前記上突出筋を収容可能な上突出筋格納部を有し、
前記上継手第一鉛直面又は前記上継手第二鉛直面と、前記下継手第一鉛直面又は前記下継手第二鉛直面とは、突設長が調整可能なインサートを有し、
前記上継手構造を有する前記本体の下面又は前記上継手下面に、前記下突出筋格納部の前記本体側の端部と連続し、前記下定着板と前記下ナットを収める下切り欠きを有し、
前記下継手構造を有する前記本体の上面又は前記下継手上面に、前記上突出筋格納部の前記本体側の端部と連続し、前記上定着板と前記上ナットを収める上切り欠きを有する、
プレキャストコンクリート版。 the main body;
a joint structure provided on at least part of the peripheral surface of the main body,
The joint structure is
an upper joint upper surface, an upper joint lower surface protruding from the main body shorter than the upper joint upper surface, an upper joint first vertical surface extending vertically downward from an end of the upper joint upper surface, and an end of the upper joint lower surface an upper joint second vertical surface extending vertically upward from a part; an upper joint inclined surface connecting the lower end of the upper joint first vertical surface and the upper end of the upper joint second vertical surface; An upper joint structure and/or having an upper protruding muscle provided
a lower joint upper surface, a lower joint lower surface protruding from the main body longer than the lower joint upper surface, a lower joint first vertical surface extending vertically downward from an end of the lower joint upper surface, and an end of the lower joint lower surface. a lower joint second vertical surface extending vertically upward from a portion; a lower joint inclined surface connecting the lower end of the lower joint first vertical surface and the upper end of the lower joint second vertical surface; A lower joint structure having a lower protruding muscle provided,
Each of the upper protruding muscle and the lower protruding muscle has a male-threaded tip. having an upper nut and a lower nut that are screwed to the tip of the lower protruding muscle,
The lower surface of the upper joint has a lower protruding muscle storage portion that can accommodate the lower protruding muscle,
The upper surface of the lower joint has an upper protruding muscle storage portion capable of accommodating the upper protruding muscle,
The upper joint first vertical surface or the upper joint second vertical surface and the lower joint first vertical surface or the lower joint second vertical surface have an insert whose projection length is adjustable,
The lower surface of the main body having the upper joint structure or the lower surface of the upper joint has a lower notch that is continuous with the end of the lower protruding muscle storage portion on the main body side and accommodates the lower fixing plate and the lower nut. ,
The upper surface of the main body having the lower joint structure or the upper surface of the lower joint has an upper cutout that is continuous with the end portion of the upper protruding muscle storage portion on the main body side and accommodates the upper fixing plate and the upper nut,
Precast concrete version. 前記上継手構造は、前記上継手上面又は前記本体の上面から前記下切り欠き又は前記下突出筋格納部まで貫通する充填口を有することを特徴とする、
請求項１に記載のプレキャストコンクリート版。 The upper joint structure has a filling port penetrating from the upper joint upper surface or the upper surface of the main body to the lower notch or the lower protruding muscle storage part,
A precast concrete slab according to claim 1. 前記上継手上面は、内側面にボルト孔を有するボルトボックスを有し、
前記下継手傾斜面は、前記ボルト孔に対応するアンカーナットを有することを特徴とする、
請求項１又は２に記載のプレキャストコンクリート版。 The upper joint upper surface has a bolt box having a bolt hole on the inner surface,
The lower joint inclined surface has an anchor nut corresponding to the bolt hole,
A precast concrete slab according to claim 1 or 2. 前記上継手上面と前記下継手下面とは、内側面にボルト孔を有するボルトボックスを有することを特徴とする、
請求項１又は２に記載のプレキャストコンクリート版。 The upper joint upper surface and the lower joint lower surface have a bolt box having a bolt hole on the inner surface,
A precast concrete slab according to claim 1 or 2. 請求項１又は２に記載のプレキャストコンクリート版どうしを接続して床スラブを構成する、プレキャストコンクリート版の施工方法であって、
前記上継手構造を有するプレキャストコンクリート版を吊り上げ、
既に設置した、前記下継手構造を有するプレキャストコンクリート版の前記上突出筋格納部と前記上切り欠きに、前記上突出筋と前記上定着板及び前記上ナットが収まり、前記上継手構造を有するプレキャストコンクリート版の前記下突出筋格納部と前記下切り欠きに、前記下突出筋と前記下定着板及び前記下ナットが収まるように、前記上継手構造と前記下継手構造との間に所定の隙間を設けて吊り降ろし、
前記上継手構造の前記インサートと前記下継手構造の前記インサートの突出長さを調整し、それぞれ対向する前記下継手第一鉛直面又は前記下継手第二鉛直面及び前記上継手第一鉛直面又は前記上継手第二鉛直面に当接し、
前記上突出筋の先端の前記上ナットと、前記下突出筋の前記下ナットと、を締め込み、前記上定着板及び前記下定着板を前記上突出筋格納部の端部及び前記下突出筋格納部の端部に押し付けて前記上突出筋及び前記下突出筋を緊張し、
前記隙間、前記上突出筋格納部、前記下突出筋格納部、前記上切り欠き及び前記下切り欠きに間詰材を充填することを特徴とする、
プレキャストコンクリート版の施工方法。 A precast concrete slab construction method comprising connecting the precast concrete slabs according to claim 1 or 2 to form a floor slab,
Lifting the precast concrete slab having the upper joint structure,
The upper protruding bar, the upper fixing plate and the upper nut are accommodated in the upper protruding bar storage portion and the upper notch of the already installed precast concrete slab having the lower joint structure, and the precast having the upper joint structure. A predetermined gap is provided between the upper joint structure and the lower joint structure so that the lower protruding bar, the lower fixing plate, and the lower nut are accommodated in the lower protruding bar storage portion and the lower notch of the concrete slab. and hang it down,
By adjusting the protruding length of the insert of the upper joint structure and the insert of the lower joint structure, the lower joint first vertical surface or the lower joint second vertical surface and the upper joint first vertical surface or contacting the second vertical surface of the upper joint;
The upper nut on the tip of the upper protruding muscle and the lower nut on the lower protruding muscle are tightened so that the upper fixing plate and the lower fixing plate are connected to the ends of the upper protruding muscle storage section and the lower protruding muscle. tensing the superior protruding muscle and the inferior protruding muscle by pressing against the end of the storage part;
The gap, the upper protruding muscle storage part, the lower protruding muscle storage part, the upper notch and the lower notch are filled with a filler material,
Construction method of precast concrete slab. 請求項３に記載のプレキャストコンクリート版どうしを接続して床スラブを構成する、プレキャストコンクリート版の施工方法であって、
前記上継手構造を有するプレキャストコンクリート版を吊り上げ、
既に設置した、前記下継手構造を有するプレキャストコンクリート版の前記上突出筋格納部と前記上切り欠きに、前記上突出筋と前記上定着板及び前記上ナットが収まり、前記上継手構造を有するプレキャストコンクリート版の前記下突出筋格納部と前記下切り欠きに、前記下突出筋と前記下定着板及び前記下ナットが収まるように、前記上継手構造と前記下継手構造との間に所定の隙間を設けて吊り降ろし、
前記上継手構造の前記インサートと前記下継手構造の前記インサートの突出長さを調整し、それぞれ対向する前記下継手第一鉛直面又は前記下継手第二鉛直面及び前記上継手第一鉛直面又は前記上継手第二鉛直面に当接し、
前記上継手構造の前記ボルトボックスの前記ボルト孔にボルトを挿入し、前記下継手構造の前記アンカーナットに前記ボルトを螺合し、
前記上突出筋の先端の前記上ナットと、前記下突出筋の前記下ナットと、を締め込み、前記上定着板及び前記下定着板を前記上突出筋格納部の端部及び前記下突出筋格納部の端部に押し付けて前記上突出筋及び前記下突出筋を緊張し、
前記隙間、前記上突出筋格納部、前記下突出筋格納部、前記上切り欠き、前記下切り欠き及び前記ボルトボックスに間詰材を充填することを特徴とする、
プレキャストコンクリート版の施工方法。 A method for constructing a precast concrete slab, comprising connecting the precast concrete slabs according to claim 3 to form a floor slab,
Lifting the precast concrete slab having the upper joint structure,
The upper protruding bar, the upper fixing plate and the upper nut are accommodated in the upper protruding bar storage portion and the upper notch of the already installed precast concrete slab having the lower joint structure, and the precast having the upper joint structure. A predetermined gap is provided between the upper joint structure and the lower joint structure so that the lower protruding bar, the lower fixing plate, and the lower nut are accommodated in the lower protruding bar storage portion and the lower notch of the concrete slab. and hang it down,
By adjusting the protruding length of the insert of the upper joint structure and the insert of the lower joint structure, the lower joint first vertical surface or the lower joint second vertical surface and the upper joint first vertical surface or contacting the second vertical surface of the upper joint;
inserting a bolt into the bolt hole of the bolt box of the upper joint structure and screwing the bolt into the anchor nut of the lower joint structure;
The upper nut on the tip of the upper protruding muscle and the lower nut on the lower protruding muscle are tightened so that the upper fixing plate and the lower fixing plate are connected to the ends of the upper protruding muscle storage section and the lower protruding muscle. tensing the superior protruding muscle and the inferior protruding muscle by pressing against the end of the storage part;
The gap, the upper protruding muscle storage part, the lower protruding muscle storage part, the upper notch, the lower notch and the bolt box are filled with a filler material,
Construction method of precast concrete slab. 請求項４に記載のプレキャストコンクリート版どうしを接続して床スラブを構成する、プレキャストコンクリート版の施工方法であって、
前記上継手構造を有するプレキャストコンクリート版を吊り上げ、
既に設置した、前記下継手構造を有するプレキャストコンクリート版の前記上突出筋格納部と前記上切り欠きに、前記上突出筋と前記上定着板及び前記上ナットが収まり、前記上継手構造を有するプレキャストコンクリート版の前記下突出筋格納部と前記下切り欠きに、前記下突出筋と前記下定着板及び前記下ナットが収まるように、前記上継手構造と前記下継手構造との間に所定の隙間を設けて吊り降ろし、
前記上継手構造の前記インサートと前記下継手構造の前記インサートの突出長さを調整し、それぞれ対向する前記下継手第一鉛直面又は前記下継手第二鉛直面及び前記上継手第一鉛直面又は前記上継手第二鉛直面に当接し、
前記上継手構造又は前記下継手構造のいずれか一方の前記ボルトボックスの前記ボルト孔にボルトを挿入して他方の前記ボルトボックスの前記ボルト孔を貫通させ、他方の前記ボルトボックス内で前記ボルトにナットを螺合し、
前記上突出筋の先端の前記上ナットと、前記下突出筋の前記下ナットと、を締め込み、前記上定着板及び前記下定着板を前記上突出筋格納部の端部及び前記下突出筋格納部の端部に押し付けて前記上突出筋及び前記下突出筋を緊張し、
前記隙間、前記上突出筋格納部、前記下突出筋格納部、前記上切り欠き、前記下切り欠き及び前記ボルトボックスに間詰材を充填することを特徴とする、
プレキャストコンクリート版の施工方法。 A method for constructing a precast concrete slab, comprising connecting the precast concrete slabs according to claim 4 to form a floor slab,
Lifting the precast concrete slab having the upper joint structure,
The upper protruding bar, the upper fixing plate and the upper nut are accommodated in the upper protruding bar storage portion and the upper notch of the already installed precast concrete slab having the lower joint structure, and the precast having the upper joint structure. A predetermined gap is provided between the upper joint structure and the lower joint structure so that the lower protruding bar, the lower fixing plate, and the lower nut are accommodated in the lower protruding bar storage portion and the lower notch of the concrete slab. and hang it down,
By adjusting the protruding length of the insert of the upper joint structure and the insert of the lower joint structure, the lower joint first vertical surface or the lower joint second vertical surface and the upper joint first vertical surface or contacting the second vertical surface of the upper joint;
A bolt is inserted into the bolt hole of the bolt box of either the upper joint structure or the lower joint structure to pass through the bolt hole of the other bolt box, and the bolt is inserted into the bolt inside the other bolt box. screw the nut
The upper nut on the tip of the upper protruding muscle and the lower nut on the lower protruding muscle are tightened so that the upper fixing plate and the lower fixing plate are connected to the ends of the upper protruding muscle storage section and the lower protruding muscle. tensing the superior protruding muscle and the inferior protruding muscle by pressing against the end of the storage part;
The gap, the upper protruding muscle storage part, the lower protruding muscle storage part, the upper notch, the lower notch and the bolt box are filled with a filler material,
Construction method of precast concrete slab. 前記隙間、前記上突出筋格納部、前記下突出筋格納部、前記上切り欠き及び前記下切り欠きへの前記間詰材の充填は、前記プレキャストコンクリート版の下面側から行うことを特徴とする、
請求項５乃至請求項７のいずれか一項に記載のプレキャストコンクリート版の施工方法。 The gap, the upper protruding muscle storage part, the lower protruding muscle storage part, the upper notch, and the lower notch are filled with the filling material from the lower surface side of the precast concrete slab. ,
The method for constructing a precast concrete slab according to any one of claims 5 to 7. プレキャストコンクリート版の端面に設ける、プレキャストコンクリート版の継手であって、
継手上面と、
前記継手上面より前記プレキャストコンクリート版からの突出長さが前記継手上面より短い継手下面と、
前記継手上面の端部から鉛直下方に延びる第一鉛直面と、
前記継手下面の端部から鉛直上方に延びる第二鉛直面と、
前記第一鉛直面の下端と前記第二鉛直面の上端を結ぶ傾斜面と、
前記第一鉛直面に突設する突出筋と、
前記第一鉛直面又は前記第二鉛直面の少なくともいずれか一方に、突設長が調整可能に設けるインサートと、を有し、
前記突出筋は先端が雄ネジ状であり、前記突出筋に挿通する定着板と、前記突出筋の先端に螺合するナットと、を有し、
前記継手下面は、他の前記継手と組み合わせた際に前記突出筋を収容可能な突出筋格納部を有することを特徴とする、
プレキャストコンクリート版の継手。 A precast concrete slab joint provided on an end face of a precast concrete slab,
a top surface of the joint;
a joint lower surface whose protruding length from the precast concrete slab is shorter than the joint upper surface than the joint upper surface;
a first vertical surface extending vertically downward from an end of the upper surface of the joint;
a second vertical surface extending vertically upward from an end of the lower surface of the joint;
an inclined surface connecting the lower end of the first vertical plane and the upper end of the second vertical plane;
a protruding muscle protruding from the first vertical plane;
an insert provided on at least one of the first vertical surface and the second vertical surface so that the projection length can be adjusted;
The protruding muscle has a male-threaded tip, and has a fixing plate inserted through the protruding muscle and a nut screwed to the tip of the protruding muscle,
The lower surface of the joint has a protruding muscle storage portion that can accommodate the protruding muscle when combined with another joint,
Joints in precast concrete slabs. 前記継手上面は、内側面にボルト孔を有するボルトボックスを有することを特徴とする、
請求項９に記載のプレキャストコンクリート版の継手。 The joint upper surface has a bolt box having a bolt hole on the inner surface,
A joint of precast concrete slabs according to claim 9 .
JP2022011803A 2022-01-28 2022-01-28 Precast concrete slab and its construction method Active JP7250967B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2022011803A JP7250967B1 (en) 2022-01-28 2022-01-28 Precast concrete slab and its construction method
JP2023010262A JP7385064B2 (en) 2022-01-28 2023-01-26 Precast concrete plate fittings

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2022011803A JP7250967B1 (en) 2022-01-28 2022-01-28 Precast concrete slab and its construction method

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP2023010262A Division JP7385064B2 (en) 2022-01-28 2023-01-26 Precast concrete plate fittings

Publications (2)

Publication Number Publication Date
JP7250967B1 JP7250967B1 (en) 2023-04-03
JP2023110390A true JP2023110390A (en) 2023-08-09

Family

ID=85776311

Family Applications (2)

Application Number Title Priority Date Filing Date
JP2022011803A Active JP7250967B1 (en) 2022-01-28 2022-01-28 Precast concrete slab and its construction method
JP2023010262A Active JP7385064B2 (en) 2022-01-28 2023-01-26 Precast concrete plate fittings

Family Applications After (1)

Application Number Title Priority Date Filing Date
JP2023010262A Active JP7385064B2 (en) 2022-01-28 2023-01-26 Precast concrete plate fittings

Country Status (1)

Country Link
JP (2) JP7250967B1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019002251A (en) * 2017-06-20 2019-01-10 株式会社大林組 Precast concrete floor slab connection structure and connection method
JP2020133260A (en) * 2019-02-20 2020-08-31 鹿島建設株式会社 Concrete slab joint structure and concrete slab joining method
JP2020200729A (en) * 2019-06-13 2020-12-17 三井住友建設株式会社 Concrete floor slabs and repair method for concrete floor slabs

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008255637A (en) 2007-04-04 2008-10-23 Toyo Sekkei:Kk Construction method of composite girder
JP5285305B2 (en) 2008-03-05 2013-09-11 大成建設株式会社 Precast member joint structure
JP5525489B2 (en) 2011-07-01 2014-06-18 大成建設株式会社 Concrete floor slab joint structure
JP6192302B2 (en) 2013-01-22 2017-09-06 鹿島建設株式会社 Joint structure of steel girder and concrete slab
JP6718658B2 (en) 2015-04-20 2020-07-08 大成建設株式会社 Prestressed concrete floor slab
JP2018076728A (en) 2016-11-11 2018-05-17 川田建設株式会社 Highly durable floor slab having highly rust preventive joint structure
JP6865874B2 (en) 2020-03-24 2021-04-28 大成建設株式会社 Construction method of prestressed concrete floor slab and floor slab using prestressed concrete floor slab

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019002251A (en) * 2017-06-20 2019-01-10 株式会社大林組 Precast concrete floor slab connection structure and connection method
JP2020133260A (en) * 2019-02-20 2020-08-31 鹿島建設株式会社 Concrete slab joint structure and concrete slab joining method
JP2020200729A (en) * 2019-06-13 2020-12-17 三井住友建設株式会社 Concrete floor slabs and repair method for concrete floor slabs

Also Published As

Publication number Publication date
JP7250967B1 (en) 2023-04-03
JP7385064B2 (en) 2023-11-21
JP2023110899A (en) 2023-08-09

Similar Documents

Publication Publication Date Title
KR100665876B1 (en) The prestressed opening trapezoid waveform still girder construction method of having installed concrete caisson in the upper flange
KR101020865B1 (en) Dry Beam-Column Connection of Precast Concrete Members within the Extended Limitation of Construction Tolerances
JP2009041227A (en) Structure and method for joining precast floor slabs together
KR100703134B1 (en) Prefabricated prestressed concrete beam bridge and its construction method
CN211036679U (en) Socket joint connection structure of prefabricated pier stud of assembled bridge and cushion cap
KR101107826B1 (en) Slab-type box girder made by precast concrete and method constructing the bridge therewith
JP2018076733A (en) Method of constructing connection structure of precast structural member and material cured with time
KR101860512B1 (en) Method for reinforcing cross section installation of ground and underwater structure using integral mold module
KR20100083260A (en) The upper and lower one body type multi span precast parts which has a construction improvement function
KR101458737B1 (en) Prestressed unit girder consisted of upper pit of end face and pit of cross section in girder and method constructing the bridge thereof
KR100622935B1 (en) Horizontal extension joint structuer and joint method using thereof
KR100704055B1 (en) continuous steel bridge having precast concrete slab and construction method thereof
KR20090068754A (en) Continuity girder, continuity structure of girder and construction method of the same
JP7250967B1 (en) Precast concrete slab and its construction method
JP3611510B2 (en) Half precast floor slab
KR100949584B1 (en) Pre-cast concrete elments and construction method using thereof for upper portion of bridge
JP2001026909A (en) Connection structure of floor slab using three- dimensional truss with concrete form in bridge girder
JP7264854B2 (en) Precast concrete floor slab and its construction method
JP7312308B2 (en) Precast concrete floor slab and its construction method
KR20100074741A (en) Bridge and its construction method using tide arch hybrid girders having precast slabs
KR100555246B1 (en) The bridge construction method of having used honeycomb girder type prestressed concrete composite beam and this
JP2022117112A (en) Precast concrete member joint structure and precast concrete member construction method
JP7034229B2 (en) How to build a connected structure of precast structural member and cast-in-place cured material of repaired part of cross-section repair
KR102349866B1 (en) Connecting hardware for dry method and a structure for joining a pc girder to a pc column using the connecting hardware and construction method of the joining structure
JP7396763B1 (en) 3-point anchor integrated liner, long anchor integrated liner, equipment installation method

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20220131

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20221129

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20230126

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20230307

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20230322

R150 Certificate of patent or registration of utility model

Ref document number: 7250967

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150