JP2005083072A - Joint structure and joint construction method for precast concrete slab - Google Patents

Joint structure and joint construction method for precast concrete slab Download PDF

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JP2005083072A
JP2005083072A JP2003316649A JP2003316649A JP2005083072A JP 2005083072 A JP2005083072 A JP 2005083072A JP 2003316649 A JP2003316649 A JP 2003316649A JP 2003316649 A JP2003316649 A JP 2003316649A JP 2005083072 A JP2005083072 A JP 2005083072A
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joint
precast concrete
concrete plate
connection
connection direction
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JP2003316649A
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Inventor
Nobuyuki Fujii
伸之 藤井
Ryoichi Onobe
良一 小野辺
Tatsuya Yoshida
辰也 吉田
Jiro Kondo
二郎 近藤
Osamu Genji
修 源氏
Hiroshi Osawa
廣 大澤
Sadaaki Nakamura
定明 中村
Shigeki Hirose
茂樹 広瀬
Shigeo Sato
繁雄 佐藤
Hidekazu Osanawa
英一 長縄
Akira Hirayama
晃 平山
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HOKUKON KENSETSU KOGYO KK
ISMIC KK
KOKEN IND CORP
KOWA CONCRETE KK
MAEKAWA KENSETSU KK
MARUBENI ITOCHU TECHNO STEEL C
MARUBENI-ITOCHU TECHNO STEEL CO Ltd
NALUX CORP
SHIN NIPPON SHIZAI KK
SHINWA CONCRETE KOGYO KK
TAISEI ULEC KK
Advance KK
Oriental Construction Co
Ishikawajima Kenzai Kogyo Co Ltd
Ishikawajima Construction Materials Co Ltd
Maeta Concrete Industry Ltd
K Con Co Ltd
Nihon Samicon Co Ltd
PC Bridge Co Ltd
Showa Concrete Industry Co Ltd
Kyowa Concrete Industry Co Ltd
Landes Co Ltd
Maruei Concrete Industry Co Ltd
SE Corp
Nihon Kaiser Co Ltd
Koken Sangyo KK
Izcon Co Ltd
Sumiken Concrete Kogyo KK
Original Assignee
HOKUKON KENSETSU KOGYO KK
ISMIC KK
KOKEN IND CORP
KOWA CONCRETE KK
MAEKAWA KENSETSU KK
MARUBENI ITOCHU TECHNO STEEL C
MARUBENI-ITOCHU TECHNO STEEL CO Ltd
NALUX CORP
SHIN NIPPON SHIZAI KK
SHINWA CONCRETE KOGYO KK
TAISEI ULEC KK
Advance KK
Oriental Construction Co
Ishikawajima Kenzai Kogyo Co Ltd
Ishikawajima Construction Materials Co Ltd
Maeta Concrete Industry Ltd
K Con Co Ltd
Nihon Samicon Co Ltd
PC Bridge Co Ltd
Showa Concrete Industry Co Ltd
Kyowa Concrete Industry Co Ltd
Landes Co Ltd
Maruei Concrete Industry Co Ltd
SE Corp
Nihon Kaiser Co Ltd
Koken Sangyo KK
Izcon Co Ltd
Sumiken Concrete Kogyo KK
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Application filed by HOKUKON KENSETSU KOGYO KK, ISMIC KK, KOKEN IND CORP, KOWA CONCRETE KK, MAEKAWA KENSETSU KK, MARUBENI ITOCHU TECHNO STEEL C, MARUBENI-ITOCHU TECHNO STEEL CO Ltd, NALUX CORP, SHIN NIPPON SHIZAI KK, SHINWA CONCRETE KOGYO KK, TAISEI ULEC KK, Advance KK, Oriental Construction Co, Ishikawajima Kenzai Kogyo Co Ltd, Ishikawajima Construction Materials Co Ltd, Maeta Concrete Industry Ltd, K Con Co Ltd, Nihon Samicon Co Ltd, PC Bridge Co Ltd, Showa Concrete Industry Co Ltd, Kyowa Concrete Industry Co Ltd, Landes Co Ltd, Maruei Concrete Industry Co Ltd, SE Corp, Nihon Kaiser Co Ltd, Koken Sangyo KK, Izcon Co Ltd, Sumiken Concrete Kogyo KK filed Critical HOKUKON KENSETSU KOGYO KK
Priority to JP2003316649A priority Critical patent/JP2005083072A/en
Publication of JP2005083072A publication Critical patent/JP2005083072A/en
Pending legal-status Critical Current

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Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that the thickness of a precast concrete (PC) slab is hardly reduced, because a radius of curvature is limited in the case where a round thread-ribbed bar as a joint member is bent in a looped shape, when the thickness of the PC slab is reduced, in terms of a joint structure of the PC slab. <P>SOLUTION: This joint structure of the PC slab comprises: the PC slabs which are arranged in such an opposed manner that connecting-direction ends face each other; the joint members which are protruded outward along a connecting direction from the ends and which are superposed in a direction orthogonal to the connecting direction; a reinforcing bar which is arranged by being inserted between the joint members, arranged in a superposed state, in the direction orthogonal to the connecting direction; and concrete which is placed and hardened in the connecting part between the PC slabs arranged in the opposed manner. In the joint structure of the PC slab, the joint member, which is a flat bar with a rectangular cross section, is formed in a looped shape. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、プレキャストコンクリート版(以下、単にPC版という)の継手構造とその継手工法に関する。   The present invention relates to a joint structure of a precast concrete plate (hereinafter simply referred to as a PC plate) and a joint method thereof.

例えば、橋梁におけるコンクリート床版が古くなった場合には、その古いコンクリート床板を取り外して、新しい床版であるPC床版を搬入し、隣接するPC床版同士を、ループ継手、重ね継手若しくはねじ鉄筋とカプラー等による機械式継手により、所要の目地間隔を保持して接続し、その接続部にコンクリートを打設して、打ち替えている。   For example, when a concrete floor slab in a bridge becomes old, the old concrete floor slab is removed and a new PC floor slab is carried in, and adjacent PC floor slabs are connected with a loop joint, a lap joint or a screw. With mechanical joints such as rebars and couplers, the connection is made while maintaining the required joint spacing, and concrete is placed at the connecting part for replacement.

その一例として、図11に示すように、工場で予めループ鉄筋21(直径D=19mm)の一部を接続方向の端部に埋設して形成したPC床版22(一例として厚さaが約180mm)を、トラック等の運搬手段で現場に搬入し、それをクレーン等により橋桁上において橋軸方向に列設し、当該PC床版22,22同士を所要の目地間隔b(例えば、520mm程度)をおいて敷設する。   As an example, as shown in FIG. 11, a PC floor slab 22 (thickness a is about as an example) formed by embedding a part of a loop reinforcing bar 21 (diameter D = 19 mm) in an end portion in a connecting direction in advance at a factory. 180mm) is transported to the site by means of transport such as trucks, and is lined up in the direction of the bridge axis on the bridge girder by a crane or the like, and the PC floor slabs 22 and 22 are connected to each other at a required joint interval b (for example, about 520 mm ).

前記目地部分において、前記対向したPC床版22,22の接続方向の端部から突出して互い違いに配設されたループ鉄筋21間に、橋軸方向に直交する方向へ補強鉄筋23を配筋すると共に、番線等の結束線で当該ループ鉄筋21と補強鉄筋23とを結束する。その後、前記目地間隔bをおいた接続部分にコンクリートを打設するものである(例えば、特許文献1参照)。   In the joint portion, reinforcing reinforcing bars 23 are arranged in a direction perpendicular to the bridge axis direction between the loop reinforcing bars 21 that are alternately arranged so as to protrude from the end portions in the connecting direction of the opposed PC floor slabs 22 and 22. At the same time, the loop reinforcing bar 21 and the reinforcing reinforcing bar 23 are bound by a binding wire such as a wire. Thereafter, concrete is placed in the connecting portion with the joint interval b (see, for example, Patent Document 1).

特開平11−50584号JP-A-11-50584

しかしながら、前記PC床版22の板厚を、更に薄くして橋桁の重量負担を軽減しようとすると、前記ループ鉄筋21のループ半径が小さくなり過ぎて曲げることができなくなる。また、接続部分でのコンクリート打設量を少なくするために、機械式継手にするとクレーン等で吊り降ろして敷設する施工では、そのネジ鉄筋の位置合わせに手間が掛かり施工が困難となる。本発明に係るプレキャストコンクリート版の継手構造と継手工法は、このような課題を解決するために提案されたものである。   However, if the thickness of the PC floor slab 22 is further reduced to reduce the weight burden of the bridge girder, the loop radius of the loop reinforcing bar 21 becomes too small to be bent. In addition, in order to reduce the amount of concrete placed at the connecting portion, in the construction where the mechanical joint is suspended and laid by a crane or the like, it takes time to align the screw rebar and the construction becomes difficult. The joint structure and joint method of the precast concrete plate according to the present invention have been proposed in order to solve such problems.

上記課題を解決するために、本発明に係るプレキャストコンクリート版の継手構造の要旨は、接続方向の端部を向き合わせて対向配設されたプレキャストコンクリート版と、前記端部から前記接続方向に沿って外部に突出され前記接続方向に直交する方向に重畳させられた継手部材と、前記重畳して配設された継手部材の間に、前記接続方向に直交する方向に挿通して配筋された補強鉄筋と、前記対向配設したプレキャストコンクリート版の間の接続部に打設され硬化したコンクリートとで成るプレキャストコンクリート版の継手構造において、前記継手部材が、断面形状が矩形状のフラットバーであってループ状に形成されていることである。   In order to solve the above-mentioned problems, the gist of the joint structure of a precast concrete plate according to the present invention is that a precast concrete plate disposed oppositely with the end portions in the connection direction facing each other, and the connection direction from the end portions to the connection direction. Between the joint member protruding outward and superimposed in a direction orthogonal to the connection direction, and the joint member disposed in an overlapping manner, and inserted in a direction orthogonal to the connection direction. In a joint structure of a precast concrete plate composed of a reinforcing steel bar and a concrete cast and hardened at a connecting portion between the precast concrete plates disposed opposite to each other, the joint member is a flat bar having a rectangular cross-sectional shape. It is formed in a loop shape.

前記継手部材は、プレキャストコンクリート版の端部において埋設されている部分もループ状に形成されていること、;
前記継手部材は、プレキャストコンクリート版における接続方向の両側の端部に亘って連続して設けられると共に、当該両側の端部のそれぞれから突出されてループ状に形成されていること、;
前記継手部材は、接続方向に直交する方向に連続した一本の螺旋状の部材で形成されていること、;
前記継手部材の表面には、凹凸による付着補強手段が設けられていること、を含むものである。
The joint member is formed in a loop shape in a portion embedded in an end portion of the precast concrete plate;
The joint member is continuously provided over both ends in the connecting direction of the precast concrete plate, and is protruded from each of the ends on both sides and formed in a loop;
The joint member is formed of a single spiral member continuous in a direction orthogonal to the connection direction;
The surface of the joint member is provided with adhesion reinforcing means by unevenness.

また、本発明に係るプレキャストコンクリート版の継手構造の要旨は、接続方向の端部を向き合わせて対向配設されたプレキャストコンクリート版と、前記端部から前記接続方向に沿って外部に櫛刃状に突出され前記接続方向に直交する方向に互い違いに重畳させられた継手部材と、前記重畳して配設された継手部材の間に、前記接続方向に直交する方向に挿通して配筋された補強鉄筋と、前記対向配設したプレキャストコンクリート版の間の接続部に打設され硬化したコンクリートとで成るプレキャストコンクリート版の継手構造において、前記継手部材が、外周面にねじ溝が刻設されたねじ鉄筋であり、前記互い違いに隣接している継手部材を貫通孔に挿通させ突出させて跨設される連結部材と、前記貫通孔から突出した継手部材のねじ部に螺着されて前記連結部材に向けて締め込まれたナットとから成ることである。
更に、前記連結部材の貫通孔が、隣接する継手部材をまとめて挿通させる長孔であること、;
前記補強鉄筋が、湾曲されて挿通されるPC鋼より線からなるストランドであることを含むものである。
Further, the gist of the joint structure of the precast concrete plate according to the present invention is a precast concrete plate disposed oppositely with the end portions in the connection direction facing each other, and a comb blade shape from the end portions to the outside along the connection direction. Between the joint members that are alternately superposed in the direction orthogonal to the connection direction and the joint members that are arranged in an overlapping manner, and inserted in the direction orthogonal to the connection direction. In a joint structure of a precast concrete plate composed of a reinforcing steel bar and a concrete cast and hardened at a connecting portion between the precast concrete plates disposed opposite to each other, the joint member is formed with a thread groove on an outer peripheral surface. A connecting member which is a threaded reinforcing bar and is extended by inserting the alternately adjacent joint members into the through hole and projecting, and a screw of the joint member protruding from the through hole Is to consist of a nut which is screwed toward the coupling member is screwed in.
Furthermore, the through hole of the connecting member is a long hole through which adjacent joint members are inserted together;
The reinforcing reinforcing bar includes a strand made of PC steel wire that is bent and inserted.

本発明に係るプレキャストコンクリート版の継手工法の要旨は、コンクリート版体の接続方向における端部から複数の継手部材が櫛刃状に突出されて形成されているプレキャストコンクリート版を、前記接続方向に直交する方向において前記継手部材が重畳しない状態で対向配設し、前記対向している継手部材に予め連結部材を互い違いに遊嵌状態で装着し、その後、前記対向配設されたプレキャストコンクリート版を接続方向に接近・移動させて前記継手部材を接続方向に直交する方向において重畳させ、前記連結部材を移動させて隣接する継手部材間に跨設し、前記隣接する継手部材の各々にナットを締結させて前記連結部材が接続方向に移動しないように連結し、前記対向したプレキャストコンクリート版の端部間の接続部にコンクリートを打設して接続する継手工法とするものである。   The gist of the joint method of the precast concrete plate according to the present invention is that a precast concrete plate formed by protruding a plurality of joint members in a comb blade shape from an end in the connection direction of the concrete plate is orthogonal to the connection direction. The joint members are arranged so as not to overlap each other in the direction to be connected, and the connecting members are alternately attached to the opposing joint members in a loosely fitted state in advance, and then the precast concrete plates arranged opposite to each other are connected. The joint member is overlapped in a direction perpendicular to the connection direction by moving the joint member in a direction perpendicular to the connection direction, the connecting member is moved to straddle between adjacent joint members, and a nut is fastened to each of the adjacent joint members. The connecting members are connected so that they do not move in the connecting direction, and are connected to the connecting portions between the ends of the opposed precast concrete plates. It is an joint method for connecting to Da設 bets.

上記説明したように、本発明に係るプレキャストコンクリート版の継手構造は、接続方向の端部を向き合わせて対向配設されたプレキャストコンクリート版と、前記端部から前記接続方向に沿って外部に突出され前記接続方向に直交する方向に重畳させられた継手部材と、前記重畳して配設された継手部材の間に、前記接続方向に直交する方向に挿通して配筋された補強鉄筋と、前記対向配設したプレキャストコンクリート版の間の接続部に打設され硬化したコンクリートとで成るプレキャストコンクリート版の継手構造において、前記継手部材が、断面形状が矩形状のフラットバーであってループ状に形成されているので、従来の丸形形状の継手部材よりもループ半径を小さくして曲げられることから、プレキャストコンクリート版の板厚を薄くすることができると言う優れた効果を奏するものである。   As described above, the joint structure of the precast concrete plate according to the present invention includes a precast concrete plate disposed oppositely with the end portions in the connection direction facing each other, and protrudes outward from the end portions along the connection direction. And a joint member superimposed in a direction orthogonal to the connection direction, and a reinforcing bar inserted between the joint members disposed in a superimposed manner in a direction orthogonal to the connection direction, In the joint structure of the precast concrete plate composed of the hardened concrete casted at the connecting portion between the precast concrete plates disposed opposite to each other, the joint member is a flat bar having a rectangular cross section and is in a loop shape. Because it is formed, it can be bent with a smaller loop radius than the conventional round joint member. In which excellent effects say can be thinned.

また、前記継手部材は、プレキャストコンクリート版の端部において埋設されている部分もループ状に形成されていることにより、添え筋の配筋を省くことができるという効果がある。
更に、前記継手部材は、プレキャストコンクリート版における接続方向の両側の端部に亘って連続して設けられると共に、当該両側の端部のそれぞれから突出されてループ状に形成されているので、工場におけるPC版製作時において、部品点数が減少しセット作業も容易になる。
前記継手部材が、接続方向に直交する方向に連続した一本の螺旋状の部材で形成されていることで、継手部材を型枠にセットする作業が容易となり、添え筋の配筋も省くことができて、施工性が向上する。
前記継手部材の表面には、凹凸による付着補強手段が設けられていることで、コンクリートとの付着強度が増大するものである。
In addition, the joint member has an effect that a portion of the precast concrete plate embedded in the end portion is also formed in a loop shape, so that it is possible to omit the reinforcing bar arrangement.
Furthermore, the joint member is provided continuously across the ends on both sides in the connecting direction in the precast concrete plate, and is protruded from each of the ends on both sides and formed in a loop shape. When the PC version is manufactured, the number of parts is reduced and the setting work is facilitated.
Since the joint member is formed of a single spiral member that is continuous in a direction orthogonal to the connection direction, it is easy to set the joint member on the formwork, and it is also possible to omit the reinforcing bar arrangement. And workability is improved.
Adhesion strength with concrete is increased by providing adhesion reinforcing means by unevenness on the surface of the joint member.

本発明に係るプレキャストコンクリート版の継手構造は、接続方向の端部を向き合わせて対向配設されたプレキャストコンクリート版と、前記端部から前記接続方向に沿って外部に櫛刃状に突出され前記接続方向に直交する方向に互い違いに重畳させられた継手部材と、前記重畳して配設された継手部材の間に、前記接続方向に直交する方向に挿通して配筋された補強鉄筋と、前記対向配設したプレキャストコンクリート版の間の接続部に打設され硬化したコンクリートとで成るプレキャストコンクリート版の継手構造において、前記継手部材が、外周面にねじ溝が刻設されたねじ鉄筋であり、前記互い違いに隣接している継手部材を貫通孔に挿通させ突出させて跨設される連結部材と、前記貫通孔から突出した継手部材のねじ部に螺着されて前記連結部材に向けて締め込まれたナットとから成るので、前記継手部材を重畳させて対向配設したプレキャストコンクリート版を近接させて、接続部のコンクリート打設量を減量させることができる。
更に、前記連結部材の貫通孔が、隣接する継手部材をまとめて挿通させる長孔にすることで、プレキャストコンクリート版の敷設作業が容易となる。
前記補強鉄筋が、湾曲されて挿通されるPC鋼より線からなるストランドであるので、補強鉄筋の配筋作業が容易になる。
The joint structure of the precast concrete plate according to the present invention includes a precast concrete plate disposed opposite to each other with the end portions in the connection direction facing each other, and is protruded in a comb blade shape from the end portions to the outside along the connection direction. Between the joint members alternately superimposed in the direction orthogonal to the connection direction, and between the joint members disposed in an overlapping manner, the reinforcing reinforcing bars inserted and arranged in the direction orthogonal to the connection direction, In the joint structure of the precast concrete plate composed of the hardened concrete casted at the connecting portion between the precast concrete plates disposed opposite to each other, the joint member is a screw rebar in which a thread groove is formed on the outer peripheral surface. The joint members adjacent to each other in a staggered manner are inserted into the through-holes and protruded so as to extend, and the threaded portions of the joint members protruding from the through-holes are screwed. Since consisting of nuts screwed toward the connecting member, said joint member are superimposed are approximated to face disposed with a precast concrete panel, it is possible to lose weight concrete amount of the connecting portion.
Furthermore, the laying operation of the precast concrete plate is facilitated by forming the through hole of the connecting member into a long hole through which adjacent joint members are inserted.
Since the reinforcing reinforcing bars are strands made of PC steel wires that are bent and inserted, the reinforcing bar reinforcing work becomes easy.

本発明に係るプレキャストコンクリート版の継手工法は、コンクリート版体の接続方向における端部から複数の継手部材が櫛刃状に突出されて形成されているプレキャストコンクリート版を、前記接続方向に直交する方向において前記継手部材が重畳しない状態で対向配設し、前記対向している継手部材に予め連結部材を互い違いに遊嵌状態で装着し、その後、前記対向配設されたプレキャストコンクリート版を接続方向に接近・移動させて前記継手部材を接続方向に直交する方向において重畳させ、前記連結部材を移動させて隣接する継手部材間に跨設し、前記隣接する継手部材の各々にナットを締結させて前記連結部材が接続方向に移動しないように連結し、前記対向したプレキャストコンクリート版の端部間の接続部にコンクリートを打設して接続する継手工法なので、前記連結部材により隣接する継手部材に跨って連結することが可能となり、接続部の目地間隔を狭くして対向配設することができる。また、それにより、接続部におけるコンクリートの打設量を少なくすることができる。   The precast concrete plate joint method according to the present invention is a precast concrete plate in which a plurality of joint members are formed in a comb-blade shape from the end in the connection direction of the concrete plate, and a direction orthogonal to the connection direction. In the state where the joint members do not overlap each other, the joint members are alternately mounted in advance in the loosely fitting state on the joint members facing each other, and then the precast concrete plates disposed opposite to each other are connected in the connecting direction. The joint members are overlapped in a direction orthogonal to the connection direction by moving closer and moved, the connecting member is moved to straddle between adjacent joint members, and a nut is fastened to each of the adjacent joint members. Connect so that the connecting member does not move in the connecting direction, and put concrete on the connecting part between the ends of the opposed precast concrete plates. Because the joint method for connecting and setting, the connection becomes possible to connect across the joint member adjacent the member, it is possible to face arranged by narrowing the joint space of the connecting portion. Moreover, it can reduce the amount of concrete pouring in a connection part.

また、作用に関し、本発明に係るプレキャストコンクリート版の継手構造と継手工法によれば、断面形状が矩形状のフラットバーにより、ループ半径を小さくして曲げることが可能となり、PC版の板厚を薄くすることができる。
また、継手部材において、コンクリートに埋設させる部分もループ状にすることで接合強度を向上させることができる。継手部材を一本の部材で両端部から突出させることで、施工が容易となる。
更に、継手部材を螺旋状の部材で形成することで、工場にて型枠に継手部材をセットして支持する手間が簡略化されるものである。継手部材の表面に付着補強手段があることで、現場で打設したコンクリートとの付着強度が向上する。
Further, regarding the function, according to the joint structure and joint method of the precast concrete plate according to the present invention, the flat bar having a rectangular cross section can be bent with a small loop radius, and the plate thickness of the PC plate can be reduced. Can be thinned.
Further, in the joint member, the joint strength can be improved by making the portion embedded in the concrete into a loop shape. Construction is facilitated by projecting the joint member from both ends with a single member.
Further, by forming the joint member with a spiral member, the labor of setting and supporting the joint member on the mold at the factory is simplified. By having the adhesion reinforcing means on the surface of the joint member, the adhesion strength with the concrete placed on site is improved.

プレキャストコンクリート版の端部から前記接続方向に沿って外部に櫛刃状に突出され前記接続方向に直交する方向に互い違いに重畳させられた継手部材を、貫通孔を有する連結部材で跨設させて、連結状態にすることで、対向させたプレキャストコンクリート版の端部を接近させることができるようになり、目地間隔が狭くなって、当該接続部分に打設するコンクリート量を減量させることができる。前記連結部材の貫通孔を長孔とすることで、プレキャストコンクリート版を対向配設する際の作業上の効率が向上するものである。
また、補強鉄筋をスランドにすることで、現場周囲の防護壁等に邪魔されることなく、上方向から水平方向に湾曲させて挿通作業できるようになり、接続方向に直交する方向に継手部材間に挿通させる作業の効率が向上するものである。
A joint member protruding in a comb-blade shape from the end of the precast concrete plate to the outside along the connection direction and alternately superposed in a direction perpendicular to the connection direction is straddled with a connecting member having a through hole. In the connected state, the end portions of the precast concrete plates opposed to each other can be brought close to each other, the joint interval is reduced, and the amount of concrete to be placed on the connection portion can be reduced. By making the through hole of the connecting member a long hole, the work efficiency when the precast concrete plate is disposed to be opposed is improved.
In addition, by using a reinforcing reinforcing bar as a sland, it is possible to insert it by bending it from the top to the horizontal direction without being interrupted by protective walls around the site, and between the joint members in the direction perpendicular to the connecting direction. This improves the efficiency of the work to be inserted into the.

本発明は、プレキャストコンクリート版の継手部材をフラットバーでループ状に形成することで、目的を達成するものである。
次に、本発明に係るプレキャストコンクリート版の継手構造と継手工法について、図面を参照して説明する。なお、発明の理解を容易にするため、従来例に対応する部分には、従来例と同一の符号を付けて説明する。
The present invention achieves the object by forming a joint member of a precast concrete plate in a loop shape with a flat bar.
Next, the joint structure and joint method of the precast concrete plate according to the present invention will be described with reference to the drawings. In order to facilitate understanding of the invention, portions corresponding to the conventional example will be described with the same reference numerals as those of the conventional example.

第1実施例に係るプレキャストコンクリート版1は、図1に示すように、PC版3と、PC版同士を接続させる接続方向である橋軸方向の端部3aに、該端部3aの端面から突出され、上下方向においてループ状に曲げられ、その基部が前記端部3a内に埋設されて、左右方向に複数個併設されている鋼製の継手部材2とから構成されている。   As shown in FIG. 1, the precast concrete plate 1 according to the first embodiment is connected to the PC plate 3 and the end portion 3a in the bridge axis direction, which is a connecting direction for connecting the PC plates, from the end surface of the end portion 3a. The steel joint member 2 is protruded and bent in a loop shape in the vertical direction, and a base portion thereof is embedded in the end portion 3a, and a plurality of the steel joint members 2 are provided in the horizontal direction.

前記継手部材2は、図1(B)に示すように、断面形状が矩形状のフラットバーであり、その寸法は、一例として、縦cが約12mm、横dが、25mmである。このように継手部材2は、薄いフラットバーなので、小さい曲率半径でループ状に曲げることができて、図2(A)に示すように、PC版3の板厚aが、例えば、160mmと、従来のPC床版22の板厚aの180mmよりも薄くても、支障がないものである。   As shown in FIG. 1B, the joint member 2 is a flat bar having a rectangular cross-sectional shape, and, for example, the length c is about 12 mm and the width d is 25 mm. Thus, since the joint member 2 is a thin flat bar, it can be bent in a loop shape with a small radius of curvature, and as shown in FIG. 2A, the plate thickness a of the PC plate 3 is, for example, 160 mm, Even if the plate thickness a of the conventional PC floor slab 22 is thinner than 180 mm, there is no problem.

前記プレキャストコンクリート版1を接続するには、例えば、古くなったPC床版22を新しく打ち替える橋脚上の橋桁に、前記継手部材2を接続方向(橋軸方向)に沿うようにして、プレキャストコンクリート版1をクレーン等で吊り上げて搬入し、当該プレキャストコンクリート版1を敷設する。   In order to connect the precast concrete slab 1, for example, the joint member 2 is placed along the connecting direction (bridge axis direction) on the bridge girder on which the old PC floor slab 22 is newly replaced. The plate 1 is lifted with a crane or the like, and the precast concrete plate 1 is laid.

更に、図2(A),(B)に示すように、目地間隔b(約490mm)を確保して、接続方向において2枚目のプレキャストコンクリート版1を敷設して、対向配設する。前記継手部材2は、接続方向に直交する方向(左右方向)に、ほぼ等間隔をおいて、左右の端部3aから突出して互い違いに重畳された状態となる。   Further, as shown in FIGS. 2 (A) and 2 (B), a joint space b (about 490 mm) is secured, and a second precast concrete plate 1 is laid in the connecting direction and arranged to face each other. The joint member 2 protrudes from the left and right end portions 3a at substantially equal intervals in a direction orthogonal to the connection direction (left-right direction), and is alternately superposed.

前記重畳して配設された継手部材2の間に亘って、図2に示すように、前記接続方向に直交する左右方向に、ストランドの補強鉄筋4を挿通して配筋し、その交差部において、番線等で結束する。前記補強鉄筋4は、例えば、橋桁の側方に工事用の防護壁等の障害物があっても、上方向から左右方向へと湾曲させて挿通させる作業が可能となるので、容易に行うことができるものである。   As shown in FIG. 2, between the joint members 2 arranged in a superimposed manner, the reinforcing bars 4 of the strands are inserted in the left-right direction perpendicular to the connection direction, and the crossing portions are arranged. , Bind with a wire. For example, even if there is an obstacle such as a protective wall for construction on the side of the bridge girder, the reinforcing reinforcing bar 4 can be easily inserted because it can be bent and inserted from the upper side to the left side. It is something that can be done.

そして、前記対向配設したプレキャストコンクリート版1,1の間の接続部5に、コンクリートを打設する。こうして、ループ継手によるプレキャストコンクリート版1の継手構造が完成するものである。このプレキャストコンクリート版1では、前記フラットバーの継手部材2により、板厚を160mmと薄くすることができて、打ち替えられる橋桁等の負担が軽減されるものである。   Then, concrete is placed in the connecting portion 5 between the precast concrete plates 1 and 1 disposed opposite to each other. Thus, the joint structure of the precast concrete plate 1 using the loop joint is completed. In this precast concrete plate 1, the flat bar joint member 2 can reduce the plate thickness to 160 mm, thereby reducing the burden on bridge girders and the like that can be replaced.

第2実施例に係るプレキャストコンクリート版1aは、図3(A)に示すように、フラットバーの継手部材2aは、プレキャストコンクリート版1における接続方向の両側の端部3a,3bに亘って連続して設けられると共に、当該両側の端部3a,3bのそれぞれから突出されてループ状に形成されているものである。これによる継手工法は、前述の実施例1と同様である。   In the precast concrete plate 1a according to the second embodiment, as shown in FIG. 3A, the joint member 2a of the flat bar is continuous over the end portions 3a and 3b on both sides in the connection direction in the precast concrete plate 1. And projecting from each of the end portions 3a, 3b on both sides, and formed in a loop shape. The joint method by this is the same as that of Example 1 described above.

前記継手部材2aとすることで、工場においてプレキャストコンクリート版1aを製造する際に、内部の配筋が複雑にならず、部品点数を削減できて、作業工数も低減するものである。   By using the joint member 2a, when the precast concrete plate 1a is manufactured in a factory, the internal bar arrangement is not complicated, the number of parts can be reduced, and the number of work steps can be reduced.

第3実施例に係るプレキャストコンクリート版1bは、図3(B)に示すように、フラットバーの継手部材2cは、端部3aにおいて埋設されている部分もループ状に形成されているものである。このようにすることで接続強度が増強されて、例えば、図2(B)に示されている継手部材用の添え筋6を省略することができるものである。なお、上記第2実施例の場合でも、この添え筋6を省略することができるものである。   In the precast concrete plate 1b according to the third embodiment, as shown in FIG. 3 (B), the joint member 2c of the flat bar is also formed in a loop shape at the portion embedded in the end portion 3a. . By doing so, the connection strength is enhanced, and for example, the splicing 6 for the joint member shown in FIG. 2B can be omitted. Even in the case of the second embodiment, the accessory bar 6 can be omitted.

第4実施例は、図3(C)に示すように、フラットバーの継手部材2dにおいて、その表面に、凹凸による付着補強手段が設けられているものである。この凹凸を付与する方法は、ショットピーニング等の公知の方法による。また、凹凸は、表面処理として、非平滑面に仕上げるものであれば、三角状、円弧状、等その凹凸の形状を限定するものではない。これにより、コンクリートとの付着強度が増すものである。   In the fourth embodiment, as shown in FIG. 3C, a flat bar joint member 2d is provided with adhesion reinforcing means by unevenness on the surface thereof. The method for providing the unevenness is a known method such as shot peening. In addition, as long as the unevenness is a non-smooth surface as a surface treatment, the shape of the unevenness such as a triangular shape or an arc shape is not limited. Thereby, adhesion strength with concrete increases.

第5実施例は、図4に示すように、フラットバーの継手部材2eが、接続方向に直交する方向(左右方向)に連続した一本の螺旋状の部材で形成されていることである。このようにしたプレキャストコンクリート版1cでは、工場にて継手部材2eを型枠にセットする際の施工が容易になり、部品点数が低減されると共に、添え筋6を省くこともできるものである。   In the fifth embodiment, as shown in FIG. 4, the joint member 2e of the flat bar is formed of a single spiral member that is continuous in a direction (left-right direction) orthogonal to the connection direction. In the precast concrete plate 1c thus configured, the construction when the joint member 2e is set on the formwork at the factory is facilitated, the number of parts is reduced, and the supplementary bar 6 can be omitted.

第6実施例は、ねじ鉄筋と連結部材による機械式継手構造である。図5に示すように、プレキャストコンクリート版1dの端部から外部に櫛刃状に突出している継手部材7は、その外周面にねじ溝が刻設された、異形棒鋼であるねじふし鉄筋、または、ボルト等のねじ鉄筋である。   The sixth embodiment is a mechanical joint structure using threaded reinforcing bars and connecting members. As shown in FIG. 5, the joint member 7 protruding like a comb blade from the end of the precast concrete plate 1 d to the outside has a threaded reinforcing bar that is a deformed steel bar having a thread groove formed on the outer peripheral surface thereof, or Screw rebars such as bolts.

前記ねじ鉄筋は、接続方向に直交する左右方向において、図5(B)に示すように、互い違いに所望の間隔を置いて重畳されている。そして、この重畳されて隣接している継手部材7の一群、例えば、対向配設されたプレキャストコンクリート版1dの端部の内、一方の端部から突出した1本の継手部材7と、それを中心にして他方の端部から突出した両側の2本の継手部材7を一組として、これらの3本の継手部材7を、図6(A)に示すように、貫通孔8aに遊嵌状態で挿通させ突出させて跨設される連結部材8で連結する。これを、5乃至図6に示すように、上下2段に配設する。   As shown in FIG. 5B, the screw rebars are alternately superposed at a desired interval in the left-right direction orthogonal to the connection direction. A group of joint members 7 that are adjacent to each other, for example, one joint member 7 that protrudes from one end portion of the end portions of the precast concrete plate 1d that is disposed opposite to each other, A set of two joint members 7 on both sides projecting from the other end with the center as a set, these three joint members 7 are loosely fitted into the through holes 8a as shown in FIG. 6 (A). It connects with the connecting member 8 which is made to pass through, protrudes, and is extended. As shown in FIG. 5 to FIG.

前記連結部材8は、PC版敷設作業に際し、接続方向に直交する左右方向において、前記継手部材7が重畳しない状態にプレキャストコンクリート版1dを対向配設した状態で、前記一組の対向している継手部材7のうち、2本の継手部材7,7に予め当該連結部材8を遊嵌状態で装着しておく。   The connecting member 8 faces the set in the state in which the precast concrete plate 1d is disposed opposite to the joint member 7 so that the joint member 7 does not overlap in the left-right direction perpendicular to the connection direction during the PC plate laying operation. Of the joint members 7, the connection members 8 are mounted in advance on the two joint members 7, 7 in a loosely fitted state.

その後、前記対向配設された他方のプレキャストコンクリート版1dを接続方向に接近・移動させて、残りの1本の継手部材7を接続方向に直交する方向において重畳させる。
そして、前記連結部材8を移動させて隣接する一組(3本)の継手部材7間に跨設させる。更に、前記連結部材8の貫通孔8aから接続方向において、互い違いにして反対側に突出している、継手部材7の端部に、図6(B)に示すように、ナット9をそれぞれ螺装し、連結部材8に向かって締め込む工法とするものである。
Thereafter, the other precast concrete slab 1d arranged opposite to is moved in the connection direction, and the remaining one joint member 7 is overlapped in a direction orthogonal to the connection direction.
Then, the connecting member 8 is moved so as to straddle between a pair (three) of adjacent joint members 7. Further, as shown in FIG. 6B, nuts 9 are respectively screwed on the end portions of the joint member 7 that alternately protrude from the through hole 8a of the connecting member 8 in the connecting direction. The construction method is to fasten toward the connecting member 8.

その後は、補強鉄筋4を左右方向に配筋して番線等で交差部を結束し、接続部5にコンクリートを打設するものである。なお、前記連結部材8は、アルミダイキャスト等の鋳物製、若しくは、鋼製であり、前記貫通孔8aの開口端部は、継手部材7の位置的誤差を吸収して挿入しやすいようにテーパ状に拡径して開いている。   After that, reinforcing reinforcing bars 4 are arranged in the left-right direction, the intersections are bundled with a wire or the like, and concrete is placed in the connection part 5. The connecting member 8 is made of a casting such as aluminum die cast or steel, and the opening end of the through hole 8a is tapered so as to absorb the positional error of the joint member 7 and to be easily inserted. The diameter is expanded and opened.

こうして、前記左右方向において重畳させて互い違いに配設した継手部材7により、プレキャストコンクリート版1dが、その目地間隔bを、例えば、300mmと狭くして(従来は、520mm)、対向配設できるものである。これにより、接続部5に打設するコンクリートの打ち込み量を大幅に軽減させることができる。   In this way, the joint members 7 that are alternately arranged in the left-right direction can be arranged opposite to each other so that the precast concrete slab 1d has a joint interval b narrowed to, for example, 300 mm (previously 520 mm). It is. Thereby, the amount of concrete to be placed on the connecting portion 5 can be greatly reduced.

第7実施例は、図7に示すように、連結部材の変形例であり、この連結部材8bは、継手部材7を装通させる貫通孔を、隣接する継手部材7をまとめて挿通させる長孔8cに形成したものである。このようにすれば、継手部材7を貫通孔に挿通させるときに、位置ズレによる作業の煩わしさが解消されるものである。   As shown in FIG. 7, the seventh embodiment is a modification of the connecting member. The connecting member 8b is a long hole through which the joint member 7 is inserted through the through holes through which the joint member 7 is inserted. 8c. In this way, when the joint member 7 is inserted through the through-hole, the troublesome work due to the displacement is eliminated.

第8実施例は、図8(A)に示すように、連結部材8と継手部材7を連結する際に、プレキャストコンクリート版1dの左右方向の両端部側において、1本の継手部材7に対して、ナット9を連結部材8の両側に定着させて、ダブルナットにするものである。これにより、ナット9の緩みを防止するものである。   In the eighth embodiment, as shown in FIG. 8 (A), when the connecting member 8 and the joint member 7 are connected, at one end of the precast concrete plate 1d in the left-right direction, The nut 9 is fixed to both sides of the connecting member 8 to form a double nut. This prevents the nut 9 from loosening.

第9実施例は、図8(B)に示すように、接続部5において、端部3a,3bの端面3cの形状に係るもので、プレキャストコンクリート版1dの接続部5に影響を与える剪断力に対応して、前記端面3cを、上方に拡がるテーパ状にしたものである。なお、場合によっては、端面3cを逆に傾斜させることもある。これにより、接続部5が剪断力に対して効率的に抵抗するものである。   As shown in FIG. 8 (B), the ninth embodiment relates to the shape of the end surface 3c of the end portions 3a and 3b in the connecting portion 5, and the shearing force that affects the connecting portion 5 of the precast concrete plate 1d. Corresponding to the above, the end surface 3c is tapered so as to expand upward. In some cases, the end surface 3c may be inclined in reverse. Thereby, the connection part 5 resists efficiently with respect to a shearing force.

第10実施例は、図9に示すように、連結部材8の変形例に係るものであり、同図(A)は、4本の継手部材7を一組として連結する連結部材8dの例である。この連結部材8dには、貫通孔が4個設けられている。なお、前記貫通孔に関しては、同図(B)に示すように、内側の2本の継手部材7用に、長孔8eを設けても良い。このほか、図10に示すように、3本の継手部材7と、これに対向してその間に間隔を置いて重畳される2本の継手部材7を連結させる、合計5個の貫通孔を有した連結部材8fとすることもできる。継手部材7に対する連結部材の装着作業における施工性が向上するものである。   As shown in FIG. 9, the tenth embodiment relates to a modification of the connecting member 8, and FIG. 9A is an example of a connecting member 8d that connects four joint members 7 as a set. is there. The connecting member 8d is provided with four through holes. In addition, regarding the said through-hole, as shown to the same figure (B), you may provide the long hole 8e for two joint members 7 inside. In addition, as shown in FIG. 10, there are a total of five through-holes that connect three joint members 7 and two joint members 7 that face each other and are overlapped with a gap therebetween. It can also be set as the connecting member 8f. The workability in the mounting operation of the connecting member to the joint member 7 is improved.

第1実施例に係るプレキャストコンクリート版の一部の斜視図(A)、フラットバーの継手部材2の断面図(B)である。It is a perspective view (A) of a part of precast concrete plate concerning a 1st example, and a sectional view (B) of joint member 2 of a flat bar. 同第1実施例に係るプレキャストコンクリート版の継手構造の接続部における、縦断面図(A)と、平面視した横断面図(B)である。It is the longitudinal cross-sectional view (A) in the connection part of the joint structure of the precast concrete plate which concerns on the 1st Example, and the cross-sectional view (B) planarly viewed. 同第2実施例に係るプレキャストコンクリート版1aの断面図(A)と、第3実施例に係るプレキャストコンクリート版1bの一部断面図(B)と、第4実施例に係る継手部材2dの側面図(C)である。Sectional view (A) of precast concrete plate 1a according to the second embodiment, partial sectional view (B) of precast concrete plate 1b according to the third embodiment, and side surface of joint member 2d according to the fourth embodiment It is a figure (C). 同第5実施例に係るプレキャストコンクリート版1cの一部の平面図である。It is a partial top view of the precast concrete plate 1c which concerns on the 5th Example. 同第6実施例に係るプレキャストコンクリート版1dの接続部における正面図(A)と、平面図(B)である。It is the front view (A) and the top view (B) in the connection part of the precast concrete plate 1d which concerns on the 6th Example. 同第6実施例に係るプレキャストコンクリート版1dの一部断面図(A)と、連結部材8とナット9とで継手部材7を連結した状態の正面図(B)である。It is the front view (B) of the state which connected the joint member 7 with the partial sectional view (A) of the precast concrete board | plate 1d based on the 6th Example, and the connection member 8 and the nut 9. FIG. 同第7実施例に係る連結部材8bの正面図である。It is a front view of the connection member 8b which concerns on the 7th Example. 同第8実施例に係るプレキャストコンクリート版1dの接続部の平面図(A)、第9実施例に係るプレキャストコンクリート版1dの接続部の正面図(B)である。It is the top view (A) of the connection part of the precast concrete plate 1d which concerns on the 8th Example, and the front view (B) of the connection part of the precast concrete plate 1d which concerns on a 9th Example. 同第10実施例に係る連結部材8dの使用状態を示す説明図(A)と、連結部材8dの正面図(B)である。It is explanatory drawing (A) which shows the use condition of the connection member 8d based on the 10th Example, and the front view (B) of the connection member 8d. 同第10実施例に係る連結部材8fの使用状態を示す説明図である。It is explanatory drawing which shows the use condition of the connection member 8f which concerns on the 10th Example. 従来例に係るプレキャストコンクリート版の継手構造を示す正面図(A)と、同平面図(B)である。It is the front view (A) which shows the joint structure of the precast concrete plate which concerns on a prior art example, and the same top view (B).

符号の説明Explanation of symbols

1,1a,1b,1c,1d プレキャストコンクリート版、
2 ,2a,2c,2d,2e フラットバーの継手部材、
3 PC版、 3a,3b 端部、
3c 端面、 4 補強鉄筋、
5 接続部、 6 添え筋、
7 ねじ鉄筋の継手部材、
8,8b,8d,8f 連結部材、
8a 貫通孔、 8c,8e 長孔、
9 ナット、 21 ループ鉄筋、
22 PC版、 23 補強鉄筋。
1, 1a, 1b, 1c, 1d precast concrete plate,
2, 2a, 2c, 2d, 2e flat bar joint members,
3 PC version, 3a, 3b end,
3c end face, 4 reinforcing bar,
5 connections, 6 accessory muscles,
7 Screw rebar joint members,
8, 8b, 8d, 8f connecting member,
8a through hole, 8c, 8e long hole,
9 nuts, 21 loop rebars,
22 PC version, 23 Reinforcing bars.

Claims (9)

接続方向の端部を向き合わせて対向配設されたプレキャストコンクリート版と、
前記端部から前記接続方向に沿って外部に突出され前記接続方向に直交する方向に重畳させられた継手部材と、
前記重畳して配設された継手部材の間に、前記接続方向に直交する方向に挿通して配筋された補強鉄筋と、
前記対向配設したプレキャストコンクリート版の間の接続部に打設され硬化したコンクリートとで成るプレキャストコンクリート版の継手構造において、
前記継手部材が、断面形状が矩形状のフラットバーであってループ状に形成されていること、
を特徴とするプレキャストコンクリート版の継手構造。
A precast concrete slab arranged oppositely with the ends in the connection direction facing each other;
A joint member protruding outside from the end portion along the connection direction and superimposed in a direction orthogonal to the connection direction;
Between the joint members arranged in a superimposed manner, reinforcing reinforcing bars inserted and arranged in a direction orthogonal to the connection direction;
In the joint structure of the precast concrete plate composed of the concrete cast and hardened at the connection part between the precast concrete plates arranged opposite to each other,
The joint member is a flat bar having a rectangular cross-sectional shape and is formed in a loop shape;
A joint structure of precast concrete plates characterized by
継手部材は、プレキャストコンクリート版の端部において埋設されている部分もループ状に形成されていること、
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の継手構造。
The joint member is also formed in a loop shape in the part embedded in the end of the precast concrete plate,
The joint structure of the precast concrete plate according to claim 1.
継手部材は、プレキャストコンクリート版における接続方向の両側の端部に亘って連続して設けられると共に、当該両側の端部のそれぞれから突出されてループ状に形成されていること、
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の継手構造。
The joint member is continuously provided across the end portions on both sides in the connecting direction in the precast concrete plate, and is protruded from each of the end portions on both sides and formed in a loop shape,
The joint structure of the precast concrete plate according to claim 1.
継手部材は、接続方向に直交する方向に連続した一本の螺旋状の部材で形成されていること、
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の継手構造。
The joint member is formed of a single spiral member continuous in a direction orthogonal to the connection direction;
The joint structure of the precast concrete plate according to claim 1.
継手部材の表面には、凹凸による付着補強手段が設けられていること、
を特徴とする請求項1乃至4のいずれかに記載のプレキャストコンクリート版の継手構造。
The surface of the joint member is provided with adhesion reinforcing means by unevenness,
The joint structure of a precast concrete plate according to any one of claims 1 to 4.
接続方向の端部を向き合わせて対向配設されたプレキャストコンクリート版と、
前記端部から前記接続方向に沿って外部に櫛刃状に突出され前記接続方向に直交する方向に互い違いに重畳された継手部材と、
前記重畳して配設された継手部材の間に、前記接続方向に直交する方向に挿通して配筋された補強鉄筋と、
前記対向配設したプレキャストコンクリート版の間の接続部に打設され硬化したコンクリートとで成るプレキャストコンクリート版の継手構造において、
前記継手部材が、外周面にねじ溝が刻設されたねじ鉄筋であり、
前記互い違いに隣接している継手部材を貫通孔に挿通させ突出させて跨設される連結部材と、
前記貫通孔から突出した継手部材のねじ部に螺着されて前記連結部材に向けて締め込まれたナットとから成ること、
を特徴とするプレキャストコンクリート版の継手構造。
A precast concrete slab arranged oppositely with the ends in the connection direction facing each other;
A joint member that protrudes outwardly from the end along the connection direction in a comb-blade shape and is alternately superimposed in a direction perpendicular to the connection direction;
Between the joint members arranged in a superimposed manner, reinforcing reinforcing bars inserted and arranged in a direction orthogonal to the connection direction;
In the joint structure of the precast concrete plate made of the concrete cast and hardened at the connection between the precast concrete plates disposed opposite to each other,
The joint member is a screw rebar in which a thread groove is formed on the outer peripheral surface,
A connecting member straddling over the staggered adjacent joint members inserted through the through hole; and
A nut screwed into the threaded portion of the joint member protruding from the through hole and tightened toward the connecting member;
A joint structure of precast concrete plates characterized by
連結部材の貫通孔が、隣接する継手部材をまとめて挿通させる長孔であること、
を特徴とする請求項6に記載のプレキャストコンクリート版の継手構造。
The through hole of the connecting member is a long hole that allows adjacent joint members to be inserted together;
The joint structure of a precast concrete plate according to claim 6.
補強鉄筋が、湾曲されて挿通されるPC鋼より線からなるストランドであること、
を特徴とする請求項1乃至7のいずれかに記載のプレキャストコンクリート版の継手構造。
The reinforcing steel bars are strands made of PC steel wires that are bent and inserted;
The joint structure of a precast concrete plate according to any one of claims 1 to 7.
コンクリート版体の接続方向における端部から複数の継手部材が櫛刃状に突出されて形成されているプレキャストコンクリート版を、前記接続方向に直交する方向において前記継手部材が重畳しない状態で対向配設し、
前記対向している継手部材に予め連結部材を互い違いに遊嵌状態で装着し、
その後、前記対向配設されたプレキャストコンクリート版を接続方向に接近・移動させて前記継手部材を接続方向に直交する方向において重畳させ、
前記連結部材を移動させて隣接する継手部材間に跨設し、
前記隣接する継手部材の各々にナットを締結させて前記連結部材が接続方向に移動しないように連結し、
前記対向したプレキャストコンクリート版の端部間の接続部にコンクリートを打設して接続すること、
を特徴とするプレキャストコンクリート版の継手工法。
A precast concrete plate formed by projecting a plurality of joint members in a comb-blade shape from the end in the connection direction of the concrete plate body is opposed to the joint plate without overlapping the joint members in a direction perpendicular to the connection direction. And
The connecting members are alternately mounted in the loosely fitting state in advance on the opposing joint members,
Then, the precast concrete plate disposed oppositely is moved in the connection direction to overlap the joint member in a direction orthogonal to the connection direction,
Move the connecting member and straddle between adjacent joint members,
A nut is fastened to each of the adjacent joint members so that the connecting member does not move in the connecting direction,
Placing and connecting concrete to the connection between the ends of the opposed precast concrete plates;
A joint method for precast concrete plates characterized by
JP2003316649A 2003-09-09 2003-09-09 Joint structure and joint construction method for precast concrete slab Pending JP2005083072A (en)

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