JP2013014899A - Joint structure for concrete slab - Google Patents

Joint structure for concrete slab Download PDF

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JP2013014899A
JP2013014899A JP2011147213A JP2011147213A JP2013014899A JP 2013014899 A JP2013014899 A JP 2013014899A JP 2011147213 A JP2011147213 A JP 2011147213A JP 2011147213 A JP2011147213 A JP 2011147213A JP 2013014899 A JP2013014899 A JP 2013014899A
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floor slab
joint
slab member
floor
joining structure
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JP5525489B2 (en
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Yoshihiro Tanaka
良弘 田中
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Taisei Corp
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Taisei Corp
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Abstract

PROBLEM TO BE SOLVED: To provide a joint structure for a floor slab, which can shorten a construction period and is excellent in workability.SOLUTION: In a joint structure 1 for a floor slab, end surfaces of first and second floor slab members 10a and 10b are joined in the state of butting against each other. The first floor slab member 10a has an overhang part 12 which overhangs toward the second floor slab member 10b from its body part 11. A longitudinal joint J1 is formed between the end surface of the body part 11 of the first floor slab member 10a and the end surface of the second floor slab member 10b. A horizontal joint J2 is formed between a top surface of the overhang part 12 of the first floor slab member 10a and an undersurface of the second floor slab member 10b. The longitudinal and horizontal joints J1 and J2 are filled with a filler 30 and continue into each other.

Description

本発明は、コンクリート床版の接合構造に関するものである。   The present invention relates to a joint structure for concrete slabs.

橋梁や人工地盤等の床版を場所打ちコンクリートにより施工する場合は、支保工等を設置するための十分な施工スペースが必要である。また、コンクリートの打設、養生、脱型等に日数を要するため、工期の短縮化が困難であった。   When constructing floor slabs such as bridges and artificial ground with cast-in-place concrete, sufficient construction space is required to install support works. Moreover, since it takes days for concrete placement, curing, demolding, etc., it was difficult to shorten the construction period.

一方、プレキャスト製の床版部材を使用すると、工期短縮化を図ることができる。
このような床版部材としては、プレストレストコンクリート（ＰＣ）構造の床版と、鉄筋コンクリート（ＲＣ）構造の床版とがある。 On the other hand, if a precast floor slab member is used, the construction period can be shortened.
Such floor slab members include a floor slab having a prestressed concrete (PC) structure and a floor slab having a reinforced concrete (RC) structure.

ＲＣ構造の床版では、自動車荷重等の繰り返し載荷により、床版の接合部において疲労損傷が生じるおそれがある。一方、ＰＣ構造の床版は、ＲＣ構造の床版と比較して疲労耐久性に優れている。
また、ＰＣ構造の床版は、ＲＣ構造の床版と比較して、軽量化が可能であるため、床版架設時のクレーン能力や完成時の地震荷重に対しても優位である。 In the RC structure floor slab, fatigue damage may occur at the joint of the floor slab due to repeated loading such as automobile load. On the other hand, the floor slab of the PC structure is excellent in fatigue durability as compared with the floor slab of the RC structure.
In addition, since the PC structure floor slab can be reduced in weight compared to the RC structure floor slab, it is superior to the crane capacity at the time of slab erection and the earthquake load at completion.

このような、ＰＣ構造の床版の接合構造として、接合部をリブ構造とする場合がある（例えば、特許文献１や特許文献２参照）。   As such a PC structure floor slab joining structure, the joining part may have a rib structure (see, for example, Patent Document 1 and Patent Document 2).

従来の接合構造では、接合面が床版上面からリブ下面まで連続して形成されているため、リブの下面において継目が露出することになる。   In the conventional joining structure, since the joining surface is continuously formed from the floor slab upper surface to the rib lower surface, the seam is exposed on the lower surface of the rib.

床版の上面から下面まで連続する接合面を有する接合構造では、床版接合部に正曲げモーメント（床版の上側に圧縮応力が発生し、下側に引張応力が発生する曲げモーメント）が作用した際に、接合部の下縁に曲げ引張応力による目開きが生じるおそれがあった。   In a joint structure that has a continuous joint surface from the upper surface to the lower surface of the floor slab, a positive bending moment (a bending moment that generates compressive stress on the upper side of the floor slab and tensile stress on the lower side) acts on the floor slab joint. When doing so, there was a risk of opening due to bending tensile stress at the lower edge of the joint.

なお、特許文献１では、リブ構造を貫通する締め付けボルトを配設することにより接合部の下縁における目開きを防止している。
また、特許文献２では、継目を跨ぐように配設された締め付けボルトにより接合部の下縁における目開きを防止している。 In Patent Document 1, an opening at the lower edge of the joint is prevented by arranging a fastening bolt that penetrates the rib structure.
Moreover, in patent document 2, the opening in the lower edge of a junction part is prevented with the clamping bolt arrange | positioned so that a joint may be straddled.

特開平８−２４６４１５号公報JP-A-8-246415 特開２０１０−２６１２４６号公報JP 2010-261246 A

ところが、特許文献１および特許文献２の接合構造では、締め付けボルトを配設して締め付ける作業が、工期短縮化の妨げとなっていた。
また、継目が下面に露出しているため、接合部の下方において上向きで目地部の処理作業を行う必要があり、その作業に手間を要していた。 However, in the joint structure of Patent Document 1 and Patent Document 2, the work of arranging and tightening the tightening bolts hinders the shortening of the work period.
Further, since the seam is exposed on the lower surface, it is necessary to perform the processing operation of the joint portion in the upward direction below the joint portion, which requires time and effort.

本発明は、前記課題を解決するものであって、工期の短縮化を可能とし、施工性にも優れた床版の接合構造を提案することを課題とする。   This invention solves the said subject, and makes it a subject to propose the joining structure of the floor slab which can shorten a construction period and was excellent also in workability.

前記の課題を解決する本発明の床版の接合構造は、第一床版部材および第二床版部材の端面同士を突き合せた状態で接合するものであって、前記第一床版部材は、その本体部から前記第二床版部材に向って張り出す張出部を有し、前記第一床版部材の本体部の端面と前記第二床版部材の端面との間に縦目地が形成されており、前記第一床版部材の張出部の上面と前記第二床版部材の下面との間に横目地が形成されており、前記縦目地および前記横目地には充填材が充填されており、前記縦目地および前記横目地は連続しており、前記縦目地の上端と前記横目地の先端が外面に面していることを特徴としている。   The floor slab joining structure of the present invention that solves the above-mentioned problem is a joining in a state where the end surfaces of the first floor slab member and the second floor slab member are butted together, and the first floor slab member is , A projecting portion projecting from the main body portion toward the second floor slab member, and a vertical joint between the end surface of the main body portion of the first floor slab member and the end surface of the second floor slab member. A horizontal joint is formed between the upper surface of the overhanging portion of the first floor slab member and the lower surface of the second floor slab member, and a filler is provided on the vertical joint and the horizontal joint. The vertical joint and the horizontal joint are continuous, and the upper end of the vertical joint and the tip of the horizontal joint face the outer surface.

かかる床版の接合構造によれば、縦目地と横目地とが連続していることで、継目が下面に露出していないため、接合部の下縁において曲げ引張応力による目開きが生じるおそれがない。そのため、締め付けボルトの設置に要する手間を省略あるいは簡略化することができ、工期の短縮化を図ることができる。
また、目地が下面に露出していないため、上向きでの目地の処理作業を要しない。
なお、充填材は、セメント系充填材であってもよいし、接着剤であってもよい。 According to the joint structure of the floor slab, since the joints are continuous and the joints are not exposed on the lower surface, there is a possibility that the opening due to the bending tensile stress may occur at the lower edge of the joint. Absent. Therefore, the labor required for installing the fastening bolt can be omitted or simplified, and the construction period can be shortened.
Further, since the joint is not exposed on the lower surface, the joint processing work in the upward direction is not required.
Note that the filler may be a cement-based filler or an adhesive.

前記床版の接合構造において、前記第一床版部材および前記第二床版部材のそれぞれに凹部が形成されており、前記両凹部が前記縦目地または前記横目地を挟んで対峙していて、前記各凹部に前記充填材が充填されている場合には、硬化した充填材がせん断キーとして機能する。
また、前記第一床版部材および前記第二床版部材の一方に凹部が形成されているとともに他方に凸部が形成されており、前記凹部および前記凸部が前記縦目地または前記横目地を挟んで対峙していて、前記凹部に前記凸部が入り込んでいる場合には、この凹部と凸部がせん断キーとして機能する。 In the joint structure of the floor slabs, a recess is formed in each of the first floor slab member and the second floor slab member, and the both recesses face each other across the vertical joint or the horizontal joint, When each of the recesses is filled with the filler, the cured filler functions as a shear key.
Further, a concave portion is formed on one of the first floor slab member and the second floor slab member and a convex portion is formed on the other, and the concave portion and the convex portion serve as the vertical joint or the horizontal joint. When the convex portions are inserted into the concave portions, the concave portions and the convex portions function as shear keys.

前記床版の接合構造において、前記第二床版部材の端部には、これを上下に貫通する貫通孔が形成されており、前記第一床版部材の張出部には、その上面が開口する有底の挿入孔が形成されており、前記挿入孔は、前記貫通孔の直下に位置し、前記挿入孔および前記貫通孔に目開き防止部材が挿入されている場合には、横目地の目開きを抑制する目開き防止部材の設置作業を容易に行うことができる。   In the joining structure of the floor slab, a through hole is formed in the end portion of the second floor slab member so as to vertically penetrate the end portion of the second floor slab member. An open bottomed insertion hole is formed, and the insertion hole is located immediately below the through hole. When an opening preventing member is inserted into the insertion hole and the through hole, a horizontal joint is formed. The installation work of the opening prevention member which suppresses the opening of this can be performed easily.

前記床版の接合構造において、一端が前記第二床版部材に埋設されて、他端が前記第一床版部材の張出部に埋設された目開き防止部材を備えていれば、横目地を引き離すような上下方向の引張力が発生した場合であっても、目開きを抑制することができる。   In the floor slab joining structure, if one end is embedded in the second floor slab member and the other end is provided with an opening prevention member embedded in the overhanging portion of the first floor slab member, a horizontal joint is provided. Even when a vertical tensile force that pulls apart is generated, the mesh opening can be suppressed.

本発明の床版の接合構造によれば、工期の短縮化を可能となり、また、施工性にも優れている。   According to the joining structure of floor slabs of the present invention, the construction period can be shortened and the workability is excellent.

本発明の実施の形態に係る床版の接合構造における床版部材の設置状況を示す斜視図である。It is a perspective view which shows the installation condition of the floor slab member in the joining structure of the floor slab which concerns on embodiment of this invention. 第一の実施の形態に係る床版の接合構造を示す拡大図である。It is an enlarged view which shows the joining structure of the floor slab which concerns on 1st embodiment. （ａ）は第一の実施の形態に係る床版の接合構造による曲げモーメントに対する抵抗メカニズムを示す図、（ｂ）〜（ｄ）は応力分布図である。(A) is a figure which shows the resistance mechanism with respect to the bending moment by the joining structure of the floor slab which concerns on 1st embodiment, (b)-(d) is a stress distribution map. 第二の実施の形態に係る床版の接合構造を示す拡大図である。It is an enlarged view which shows the joining structure of the floor slab which concerns on 2nd embodiment. 第三の実施の形態に係る床版の接合構造を示す拡大図である。It is an enlarged view which shows the joining structure of the floor slab which concerns on 3rd embodiment. 第四の実施の形態に係る床版の接合構造を示す拡大図である。It is an enlarged view which shows the joining structure of the floor slab which concerns on 4th embodiment. 第五の実施の形態に係る床版の接合構造を示す拡大図である。It is an enlarged view which shows the joining structure of the floor slab which concerns on 5th embodiment.

本発明に係る実施の形態について、図面を参照して説明する。
以下に示す実施形態では、図１に示すように、橋軸方向に沿って複数のプレキャストコンクリート製の床版部材１０，１０，…を連結することにより、橋梁を構築する場合について説明する。なお、図面において、符号２０は主桁である。 Embodiments according to the present invention will be described with reference to the drawings.
In the following embodiment, as shown in FIG. 1, a case will be described in which a bridge is constructed by connecting a plurality of precast concrete floor slab members 10, 10,... Along the bridge axis direction. In the drawings, reference numeral 20 denotes a main digit.

＜第一の実施の形態＞
第一の実施の形態に係る床版の接合構造１は、図２に示すように、隣り合う床版部材１０同士（第一床版部材１０ａおよび第二床版部材１０ｂ）の端面同士を突き合せた状態で接合するものである。 <First embodiment>
As shown in FIG. 2, the floor slab joining structure 1 according to the first embodiment pushes end surfaces of adjacent floor slab members 10 (first floor slab member 10 a and second floor slab member 10 b). They are joined together.

床版部材１０は、図１に示すように、版状の本体部１１と、一方の端部に形成された張出部１２と、他方の端部に形成された増厚部１３とを備えて構成されている。
また、床版部材１０には、床版の部材厚を下方向に増厚するように、中間リブ１６が所定の間隔毎に形成されている。なお、中間リブ１６は、必要に応じて形成すればよく、その数や形状も限定されるものではない。 As shown in FIG. 1, the floor slab member 10 includes a plate-shaped main body portion 11, an overhang portion 12 formed at one end portion, and a thickened portion 13 formed at the other end portion. Configured.
Further, intermediate ribs 16 are formed on the floor slab member 10 at predetermined intervals so as to increase the member thickness of the floor slab downward. In addition, what is necessary is just to form the intermediate rib 16 as needed, and the number and shape are not limited.

張出部１２は、図２に示すように、床版部材１０（第一床版部材１０ａ）の一方の端部において、本体部１１から隣接する他の床版部材１０（第二床版部材１０ｂ）に向って張り出す部分である。   As illustrated in FIG. 2, the overhanging portion 12 has another floor slab member 10 (second floor slab member) adjacent to the main body 11 at one end of the floor slab member 10 (first floor slab member 10 a). 10b) is a part that protrudes.

張出部１２は、本体部１１の下面に突設されている。本実施形態の張出部１２は、本体部１１の下面から下方向に延びる第一片１２ａと、第一片１２ａの下端から第二床版部材１０ｂ方向に延びる第二片１２ｂとにより、Ｌ字状に形成されている。   The overhanging portion 12 protrudes from the lower surface of the main body portion 11. The overhang portion 12 of the present embodiment includes a first piece 12a extending downward from the lower surface of the main body portion 11 and a second piece 12b extending from the lower end of the first piece 12a toward the second floor slab member 10b. It is formed in a letter shape.

第二片１２ｂは、隣り合う床版部材１０，１０の端面同士を突き合わせた状態で、他方の床版部材１０（第二床版部材１０ｂ）の下面端部を覆う。
なお、張出部１２の形状は、本体部１１の下面から隣接する他の床版部材１０に向って張り出す形状であれば限定されるものではない。 The 2nd piece 12b covers the lower surface edge part of the other floor slab member 10 (2nd floor slab member 10b) in the state which faced | matched the end surfaces of the adjacent floor slab members 10 and 10. FIG.
In addition, the shape of the overhang | projection part 12 will not be limited if it is the shape which protrudes toward the other floor slab member 10 adjacent from the lower surface of the main-body part 11. FIG.

本実施形態では、床版部材１０の一方の端部には、二つの溝１５ａ，１５ｂ（凹部１５）が形成されている。溝１５ａ，１５ｂは、橋軸直角方向に連続しており、本体部１１の端面および張出部１２（第二片１２ｂ）の上面にそれぞれ形成されている。
本実施形態では、断面台形状の溝１５ａ，１５ｂを形成するが、溝１５ａ，１５ｂの断面形状は限定されるものではない。 In the present embodiment, two grooves 15 a and 15 b (recesses 15) are formed at one end of the floor slab member 10. The grooves 15a and 15b are continuous in the direction perpendicular to the bridge axis, and are formed on the end surface of the main body 11 and the upper surface of the overhanging portion 12 (second piece 12b), respectively.
In this embodiment, the trapezoidal grooves 15a and 15b are formed, but the cross-sectional shapes of the grooves 15a and 15b are not limited.

増厚部１３は、床版部材１０の他方の端部において、下方向に増厚するように形成された部分であり、本体部１１の下面に突設されている。
床版部材１０の他方の端部には、二つの溝１５ａ，１５ｂが形成されている。溝１５ａ，１５ｂは、橋軸直角方向に連続しており、本体部１１の端面および増厚部１３の下面に、それぞれ形成されている。なお、溝１５ａ，１５ｂは、必ずしも連続している必要はなく、間欠的に形成されていてもよい。 The thickening portion 13 is a portion formed so as to increase in thickness downward at the other end portion of the floor slab member 10, and protrudes from the lower surface of the main body portion 11.
Two grooves 15 a and 15 b are formed at the other end of the floor slab member 10. The grooves 15a and 15b are continuous in the direction perpendicular to the bridge axis, and are formed on the end surface of the main body 11 and the lower surface of the thickened portion 13, respectively. The grooves 15a and 15b are not necessarily continuous, and may be formed intermittently.

床版部材１０同士（第一床版部材１０ａおよび第二床版部材１０ｂ）の接合は、本体部１１の端面同士を突き合わせるとともに、第一床版部材１０ａの張出部１２と第二床版部材１０ｂの増厚部１３とを重ね合わせることにより行う。   The joining of the floor slab members 10 (the first floor slab member 10a and the second floor slab member 10b) abuts the end faces of the main body 11 and the overhanging portion 12 of the first floor slab member 10a and the second floor. This is performed by overlapping the thickened portion 13 of the plate member 10b.

増厚部１３の下に張出部１２を位置させつつ本体部１１の端面同士を突き合わせると、第一床版部材１０ａの本体部１１の端面と第二床版部材１０ｂの端面との間には縦目地Ｊ１（隙間）が形成され、第一床版部材１０ａの張出部１３（第二片１３ｂ）の上面と第二床版部材１０ｂの増厚部１３の下面との間には横目地Ｊ２（隙間）が形成される。
縦目地Ｊ１と横目地Ｊ２は、側面視Ｌ字状に連続する。 When the end faces of the main body 11 are brought into contact with each other while the overhanging part 12 is positioned under the thickening part 13, the gap between the end face of the main body 11 of the first floor slab member 10a and the end face of the second floor slab member 10b. A vertical joint J1 (gap) is formed between the upper surface of the overhang portion 13 (second piece 13b) of the first floor slab member 10a and the lower surface of the thickened portion 13 of the second floor slab member 10b. A horizontal joint J2 (gap) is formed.
The vertical joint J1 and the horizontal joint J2 are continuously L-shaped in a side view.

また、張出部１２と増厚部１３とを重ね合わせることにより、床版部材１０同士の接合部において、床版の部材厚を下方向に増厚するリブ部１４が形成される。つまり、本実施形態の床版の接合構造１では、橋軸方向と直交するリブ部１４が形成されている。   In addition, by overlapping the overhanging portion 12 and the thickening portion 13, a rib portion 14 that increases the member thickness of the floor slab downward is formed at the joint portion between the floor slab members 10. That is, in the floor slab joining structure 1 of the present embodiment, the rib portion 14 orthogonal to the bridge axis direction is formed.

第一床版部材１０ａの本体部１１の端面に形成された溝１５ａと第二床版部材１０ｂの本体部１１の端面に形成された溝１５ａは、縦目地Ｊ１を挟んで対峙している。
また、第一床版部材１０ａの張出部１３の上面に形成された溝１５ｂと第二床版部材１０ｂの増厚部１３の下面に形成された溝１５ｂは、横目地Ｊ２を挟んで対峙している。 The groove 15a formed on the end surface of the main body 11 of the first floor slab member 10a and the groove 15a formed on the end surface of the main body 11 of the second floor slab member 10b face each other across the vertical joint J1.
Further, the groove 15b formed on the upper surface of the overhanging portion 13 of the first floor slab member 10a and the groove 15b formed on the lower surface of the thickening portion 13 of the second floor slab member 10b are opposed to each other across the horizontal joint J2. doing.

縦目地Ｊ１、横目地Ｊ２および各溝１５ａ，１５ｂには充填材３０が充填されている。本実施形態では、充填材３０として、セメント系充填材を採用する。なお、充填材３０を構成する材料は限定されるものではなく、例えば、セメント系充填材に急結材を混入した急結性セメント系充填材、セメント系充填材に補強繊維を混入したセメント系繊維補強充填材、セメントに樹脂を混入したレジンモルタル系充填材等を使用してもよい。   The vertical joint J1, the horizontal joint J2, and the grooves 15a and 15b are filled with a filler 30. In the present embodiment, a cement filler is employed as the filler 30. In addition, the material which comprises the filler 30 is not limited, For example, the quick setting cement type filler which mixed the quick setting material in the cement type filler, the cement type which mixed the reinforcing fiber in the cement type filler A fiber reinforced filler, a resin mortar filler obtained by mixing a resin in cement, or the like may be used.

横目地Ｊ２の開口端（リブ部１４の側面に現れる横目地Ｊ２の開口）は、シール材Ｓにより閉塞されている。
なお、シール材Ｓを構成する材料は限定されるものではなく、例えば、可撓性のあるクロロプレンゴム、天然ゴム、加硫ゴム、スポンジゴム、ウレタン樹脂等を使用すればよい。また、モルタル漏洩防止テープを採用してもよい。 The opening end of the horizontal joint J2 (the opening of the horizontal joint J2 that appears on the side surface of the rib portion 14) is closed by the sealing material S.
In addition, the material which comprises the sealing material S is not limited, For example, flexible chloroprene rubber, natural rubber, vulcanized rubber, sponge rubber, urethane resin etc. may be used. Moreover, you may employ | adopt a mortar leak prevention tape.

本実施形態の床版の接合構造１の施工は、以下の手順により行う。
まず、図１に示すように、主桁２０上に配設された第一床版部材１０ａに隣接して、第二床版部材１０ｂを配置する。このとき、第二床版部材１０ｂは、増厚部１３が第一床版部材１０ａの張出部１２上に位置するように配置する。 Construction of the floor slab joining structure 1 of the present embodiment is performed according to the following procedure.
First, as shown in FIG. 1, the second floor slab member 10 b is disposed adjacent to the first floor slab member 10 a disposed on the main girder 20. At this time, the second floor slab member 10b is disposed so that the thickened portion 13 is located on the overhanging portion 12 of the first floor slab member 10a.

次に、図２に示すように、縦目地Ｊ１の上面から充填材３０を注入して、縦目地Ｊ１、横目地Ｊ２および溝１５ａ，１５ｂを充填する。充填材３０が硬化すると、溝１５ａ，１５ｂに入り込んだ充填材３０がせん断キーとなる。
なお、充填材３０を充填する際には、横目地Ｊ２の側端面をシール材Ｓにより予め閉塞しておく。また、接合部の側端面（図２における紙面前側の開口端と奥側の開口端）には、図示しない型枠を設置しておく。 Next, as shown in FIG. 2, the filler 30 is injected from the upper surface of the vertical joint J1, and the vertical joint J1, the horizontal joint J2, and the grooves 15a and 15b are filled. When the filler 30 is cured, the filler 30 entering the grooves 15a and 15b becomes a shear key.
Note that the side end face of the horizontal joint J2 is previously closed with the sealing material S when the filler 30 is filled. In addition, a mold frame (not shown) is installed on the side end surfaces of the joining portion (the opening end on the front side in FIG. 2 and the opening end on the back side).

充填材３０に所定の強度が発現したら、脱型するとともに、緊張材（床版部材１０，１０に配索された緊張材または橋梁全体にわたって配索された緊張材（外ケーブル））を緊張し、床版接合部または床版全体に圧縮応力を導入する。
これにより、床版部材１０同士が一体に接合された橋梁が形成される。 When the filler 30 has a predetermined strength, it is removed from the mold, and the tension material (the tension material arranged on the floor slab members 10 or 10 or the tension material (external cable) arranged over the entire bridge) is tensioned. Introduce compressive stress to the floor slab joint or the entire floor slab.
Thereby, a bridge in which the floor slab members 10 are joined together is formed.

本実施形態の床版の接合構造１によれば、床版部材１０同士の接合部の下面に、接合面（目地）が露出しておらず、張出部が引張抵抗材として機能することで、接合部の下縁において目開きが生じることはない。   According to the floor slab joining structure 1 of the present embodiment, the joint surface (joint) is not exposed on the lower surface of the joint between the floor slab members 10, and the overhanging portion functions as a tensile resistance material. In addition, no opening occurs at the lower edge of the joint.

図３の（ａ）に示すように、床版の接合構造１に正の曲げモーメントＭが作用した場合の中心部ＣＬにおける応力分布は、図３の（ｂ）のようになる。ここで、正の曲げモーメントＭとは、図３の（ａ）に示すように、床版の上縁に曲げ圧縮応力ｃ、下縁に曲げ引張応力ｔが作用するようなモーメントＭをいう。また、プレストレス導入による応力分布は図３の（ｃ）のようになるから、正の曲げモーメントＭによる応力分布とこれらを合成すると、図３の（ｄ）のような応力分布となる。   As shown in FIG. 3A, the stress distribution in the center portion CL when the positive bending moment M acts on the floor slab joining structure 1 is as shown in FIG. Here, the positive bending moment M refers to a moment M such that a bending compressive stress c acts on the upper edge of the floor slab and a bending tensile stress t acts on the lower edge, as shown in FIG. Further, since the stress distribution due to the introduction of the prestress is as shown in FIG. 3C, when the stress distribution due to the positive bending moment M and these are combined, the stress distribution as shown in FIG. 3D is obtained.

図３に示すように、床版部材１０同士の接合部では、緊張材により導入されたプレストレスＰのより、接合部に緊張圧縮応力が導入されるが、リブ部１４に導入される緊張圧縮応力は、本体部１１に導入させる緊張圧縮応力よりも小さくなるため（図３の（ｃ）参照）、リブ構造の下縁接合部では、曲げモーメントＭによる引張応力が残存する（図３の（ｄ）参照）。   As shown in FIG. 3, in the joint portion between the floor slab members 10, the tension compression stress is introduced into the joint portion by the prestress P introduced by the tension material, but the tension compression introduced into the rib portion 14. Since the stress is smaller than the tension compression stress introduced into the main body 11 (see FIG. 3C), tensile stress due to the bending moment M remains at the lower edge joint portion of the rib structure ((FIG. 3 ( d)).

そのため、接合部の下縁において目地が露出している従来の接合構造では、下縁の接合部に十分な緊張応力が導入されていないため、正の曲げモーメントＭが作用した場合に目開きが発生してしまう。
一方、本実施形態の床版の接合構造１によれば、接合面に十分な緊張応力を実現することができない場合であっても、接合部の下縁は、張出部１２により形成されたリブ部１４の一部であるため、接合面の下縁において目開きが生じる従来の接合構造が有する問題点を解消することができる。 Therefore, in the conventional joint structure in which the joint is exposed at the lower edge of the joint portion, sufficient tension stress is not introduced into the joint portion of the lower edge, so that when the positive bending moment M acts, the mesh opening is generated. Will occur.
On the other hand, according to the floor slab joining structure 1 of the present embodiment, the lower edge of the joint portion is formed by the overhang portion 12 even when sufficient tension stress cannot be realized on the joint surface. Since it is a part of the rib part 14, the problem which the conventional joining structure in which an opening produces in the lower edge of a joining surface can be eliminated.

なお、一般的にコンクリート材料は、設計的には引張応力の発生に対しては抵抗を無視して設計するが、コンクリートは圧縮強度の１／１０程度の引張強度を有していることが知られている。また、床版コンクリートとして、セメントと、シリカフュームやフライアッシュと、高炉スラグなどの混和材粒子と、細砂や珪砂などの骨材と、高性能減水剤と水とを混入して得られるセメント系マトリックスに、直径が０．１ｍｍ〜０．３ｍｍ、長さが１０ｍｍ〜３０ｍｍの形状を有する繊維を容積で１％〜４％混入して得られる、いわゆる高強度繊維補強コンクリートを適用した場合には、圧縮強度が１５０Ｎ／ｍｍ２〜２００Ｎ／ｍｍ２、曲げ引張強度が２５Ｎ／ｍｍ２〜４５Ｎ／ｍｍ２の特性を有することができるため、より効果的である。 In general, concrete materials are designed by ignoring resistance to the generation of tensile stress, but it is known that concrete has a tensile strength of about 1/10 of the compressive strength. It has been. Also, as floor slab concrete, a cement system obtained by mixing cement, silica fume and fly ash, admixture particles such as blast furnace slag, aggregates such as fine sand and quartz sand, high performance water reducing agent and water. When so-called high-strength fiber reinforced concrete obtained by mixing 1% to 4% by volume of fibers having a shape with a diameter of 0.1 mm to 0.3 mm and a length of 10 mm to 30 mm in a matrix is applied. since the compressive strength can be 150N / mm 2 ~200N / mm 2 , bending tensile strength having the characteristics of 25N / mm 2 ~45N / mm 2 , is more effective.

また、本実施形態の床版の接合構造１によれば、横目地Ｊ２についても、目開きが生じることはない。
つまり、正の曲げモーメントＭが接合部に作用すると、水平方向の曲げ引張応力は発生するものの、鉛直方向の引張応力は発生しない。そのため、正の曲げモーメントＭによっては、リブ部１４の側面（横目地Ｊ２）における目開きは発生しない。 In addition, according to the floor slab joining structure 1 of the present embodiment, no opening is generated in the horizontal joint J2.
That is, when a positive bending moment M acts on the joint, a horizontal bending tensile stress is generated, but a vertical tensile stress is not generated. Therefore, depending on the positive bending moment M, the opening on the side surface (lateral joint J2) of the rib portion 14 does not occur.

また、リブ部１４に発生するせん断力により、横目地Ｊ２には引張応力（第二片１２ｂと増厚部１３を引き離そうとする力）が働くが、床版に導入されたプレストレスＰにより接合面に働く垂直抗力が増し、接合面での最大摩擦力が大きくなるので、横目地Ｊ２に引張応力が作用しても第二片１２ｂと増厚部１３が離間しなくなる。
さらに、縦目地Ｊ１には、せん断キーＫが設けられているため、高いせん断剛性を保持しながらせん断抵抗し、横目地Ｊ２における引張力の発生（ずれの発生）を抑制することができる。 Further, a tensile stress (a force for separating the second piece 12b and the thickened portion 13) is applied to the horizontal joint J2 due to the shearing force generated in the rib portion 14, but it is joined by the prestress P introduced into the floor slab. Since the normal force acting on the surface increases and the maximum frictional force on the joint surface increases, the second piece 12b and the thickened portion 13 do not separate even if a tensile stress acts on the horizontal joint J2.
Furthermore, since the longitudinal joint J1 is provided with the shear key K, it can resist shearing while maintaining high shear rigidity, and can suppress the generation of tensile force (occurrence of deviation) in the transverse joint J2.

本実施形態の床版の接合構造１によれば、橋軸直角方向に沿ってリブ部１４が形成されているため、床版に働く曲げモーメントが、曲げ剛性の高いリブ部１４により、橋軸直角方向に分配される。つまり、リブ部１４の主方向（橋軸直角方向）に曲げモーメントが分配されるので、接合部として負担しなければならない引張応力が減少する。
なお、床版は版構造であるため、自動車荷重や自重等の設計荷重による設計断面力としては、主に曲げモーメントが卓越する。自動車荷重等により床版に作用する卓越した曲げモーメントは、一般的に橋軸直角方向となるため、床版は橋軸方向で接合するのが合理的である。つまり、床版補強の主方向は、橋軸直角方向になるので、床版に作用する橋軸方向の曲げモーメントを小さくするのが設計上有利である。特に、床版同士の接合部では、橋軸方向の曲げモーメントが小さい方が有利となる。 According to the floor slab joining structure 1 of the present embodiment, the rib portion 14 is formed along the direction perpendicular to the bridge axis. Therefore, the bending moment acting on the floor slab is caused by the rib portion 14 having a high bending rigidity. It is distributed at right angles. That is, since the bending moment is distributed in the main direction (the direction perpendicular to the bridge axis) of the rib portion 14, the tensile stress that must be borne as the joint portion is reduced.
In addition, since the floor slab has a plate structure, the bending moment is predominant as the design cross-sectional force by the design load such as the automobile load and the own weight. Since the excellent bending moment acting on the floor slab due to automobile load or the like is generally in the direction perpendicular to the bridge axis, it is reasonable to join the floor slab in the bridge axis direction. In other words, the main direction of floor slab reinforcement is the direction perpendicular to the bridge axis, so it is advantageous in design to reduce the bending moment acting on the floor slab in the bridge axis direction. In particular, it is advantageous that the bending moment in the bridge axis direction is small at the joint between floor slabs.

床版の接合構造１は、接合部にリブ部１４が形成されているため、床版部材１０の製作精度や架設精度などの影響により、接合部において上下左右のズレが生じる場合であっても、リブ部１４において誤差を吸収することができるため、高品質施工が可能となる。   In the floor slab joining structure 1, since the rib portion 14 is formed at the joint, even if there is a vertical / left / right misalignment in the joint due to the production precision or installation precision of the floor slab member 10. Since the error can be absorbed in the rib portion 14, high-quality construction can be performed.

また、溝１５ａ，１５ａに充填された充填材３０が硬化することで、縦目地Ｊ１にせん断キーＫが形成されるため、縦目地Ｊ１に面する接合面に作用するせん断力が大きい場合であっても、せん断キーＫにより抵抗することで、接合部にズレが生じることが防止されるとともに横目地Ｊ２において、上下方向の引張応力が発生することを防ぐことが可能となる。
また、溝１５ｂ，１５ｂに充填された充填材３０が硬化することで、横目地Ｊ２にせん断キーＫが形成されるため、第二片１２ｂと増厚部１３が横目地Ｊ２において重ね梁となることを防ぐことが可能となる。 In addition, since the filler 30 filled in the grooves 15a and 15a is hardened, the shear key K is formed on the vertical joint J1, so that the shear force acting on the joint surface facing the vertical joint J1 is large. However, by resisting with the shear key K, it is possible to prevent the joint from being displaced and to prevent the vertical tensile stress from being generated at the horizontal joint J2.
Further, since the filling material 30 filled in the grooves 15b and 15b is cured, the shear key K is formed in the horizontal joint J2, so that the second piece 12b and the thickened portion 13 become overlapped beams in the horizontal joint J2. It becomes possible to prevent this.

なお、本実施形態では、縦目地Ｊ１に面するように溝１５ａ，１５ａを形成するとともに横目地Ｊ２に面するように溝１５ｂ，１５ｂを形成したが、溝１５ａ,１５ｂ（凹部１５）の数や位置は限定されるものではない。例えば、縦目地Ｊ１のみに面して凹部１５を形成してもよいし、横目地Ｊ２のみに面して凹部１５を形成してもよい。   In this embodiment, the grooves 15a and 15a are formed so as to face the vertical joint J1 and the grooves 15b and 15b are formed so as to face the horizontal joint J2. However, the number of the grooves 15a and 15b (concave portions 15) is not limited. The position is not limited. For example, the concave portion 15 may be formed facing only the vertical joint J1, or the concave portion 15 may be formed facing only the horizontal joint J2.

充填材３０を充填する際に設置する型枠として、接合部の両側面に設置して、リブ部１４に沿って配置する型枠を省略または低減することができるため、従来の接合構造と比較して、大幅に数量を削減することが可能となり、早期施工および施工費の削減が可能となる。   As a mold to be installed when filling the filler 30, it is possible to omit or reduce the molds installed on both sides of the joint and arranged along the rib part 14. Thus, the quantity can be greatly reduced, and early construction and construction costs can be reduced.

接合部が床版の下面に露出していないため、床版の下方での上向き作業が減り、その結果、施工性が向上する。
また、床版の上面で大部分の作業を行うことができるため、広い作業スペースを確保でき、施工性に優れている。 Since the joint portion is not exposed on the lower surface of the floor slab, the upward work under the floor slab is reduced, and as a result, the workability is improved.
Further, since most of the work can be performed on the upper surface of the floor slab, a wide work space can be secured and the workability is excellent.

＜第二の実施の形態＞
第二の実施の形態に係る床版の接合構造２は、図４に示すように、隣り合う床版部材１０，１０（第一床版部材１０ａおよび第二床版部材１０ｂ）の端面同士を突き合せた状態で接合するものである。 <Second Embodiment>
As shown in FIG. 4, the floor slab joining structure 2 according to the second embodiment has the end surfaces of adjacent floor slab members 10, 10 (first floor slab member 10 a and second floor slab member 10 b). It joins in the state of butting.

第一床版部材１０ａは、本体部１１の端部に形成された張出部１２を備えており、第二床版部材１０ｂは、本体部１１の端部に形成された増厚部１３を備えている。  The first floor slab member 10 a includes a protruding portion 12 formed at the end of the main body 11, and the second floor slab member 10 b includes a thickened portion 13 formed at the end of the main body 11. I have.

本実施形態の張出部１２は、図２の溝１５ａ，１５ｂが形成されていない点で、第一の実施の形態の張出部１２と異なっている。この他の張出部１２の構成は、第一の実施の形態で示した内容と同様なため、詳細な説明は省略する。   The overhanging portion 12 of this embodiment is different from the overhanging portion 12 of the first embodiment in that the grooves 15a and 15b in FIG. 2 are not formed. Since the structure of the other overhang | projection part 12 is the same as that of the content shown in 1st Embodiment, detailed description is abbreviate | omitted.

本実施形態の増厚部１３は、図２の溝１５ａ，１５ｂが形成されていない点で、第一の実施の形態の増厚部１３と異なっている。
また、増厚部１３の下面は、先端（縦目地Ｊ１側）に向う従って高くなるように、傾斜している。なお、増厚部１３の下面は、必ずしも傾斜している必要はない。
この他の増厚部１３の構成は、第一の実施の形態で示した内容と同様なため、詳細な説明は省略する。 The thickened portion 13 of the present embodiment is different from the thickened portion 13 of the first embodiment in that the grooves 15a and 15b of FIG. 2 are not formed.
Further, the lower surface of the thickened portion 13 is inclined so as to be higher toward the tip (longitudinal joint J1 side). Note that the lower surface of the thickened portion 13 is not necessarily inclined.
Since the structure of the other thickening part 13 is the same as that shown in the first embodiment, detailed description thereof is omitted.

第一床版部材１０ａと第二床版部材１０ｂの接合は、図４に示すように、互いの端面同士を突き合わせるとともに、第一床版部材１０ａの張出部１２と第二床版部材１０ｂの増厚部１３とを重ね合わせることにより行う。   As shown in FIG. 4, the joining of the first floor slab member 10a and the second floor slab member 10b abuts each other's end faces, and the overhanging portion 12 of the first floor slab member 10a and the second floor slab member. This is performed by overlapping the thickened portion 13 of 10b.

張出部１２と増厚部１３とを重ね合わせると、床版部材１０同士の接合部において、床版の部材厚を下方向に増厚するリブ部１４が橋軸方向と直交するように形成される。   When the overhanging portion 12 and the thickening portion 13 are overlapped, the rib portion 14 that increases the member thickness of the floor slab downward is formed so as to be orthogonal to the bridge axis direction at the joint portion between the floor slab members 10. Is done.

第一床版部材１０ａの本体部１１の端面と第二床版部材１０ｂの端面との間には縦目地Ｊ１が形成されており、第一床版部材１０ａの張出部１２（第二片１２ｂ）の上面と第二床版部材１０ｂの増厚部１３の下面との間には横目地Ｊ２が形成されている。
縦目地Ｊ１と横目地Ｊ２は、側面視Ｌ字状に連続している。 A vertical joint J1 is formed between the end surface of the main body 11 of the first floor slab member 10a and the end surface of the second floor slab member 10b, and the overhanging portion 12 (second piece of the first floor slab member 10a). A horizontal joint J2 is formed between the upper surface of 12b) and the lower surface of the thickened portion 13 of the second floor slab member 10b.
The vertical joint J1 and the horizontal joint J2 are continuous in an L shape in a side view.

縦目地Ｊ１および横目地Ｊ２には充填材３０が充填されている。充填材３０の構成は、第一の実施の形態で示した内容と同様なため、詳細な説明は省略する。
また、横目地Ｊ２のリブ部１４の側面に面する端部は、シール材Ｓにより遮蔽されている。シール材Ｓの構成は、第一の実施の形態で示した内容と同様なため、詳細な説明は省略する。 The vertical joint J1 and the horizontal joint J2 are filled with a filler 30. Since the structure of the filler 30 is the same as that shown in the first embodiment, a detailed description thereof is omitted.
Further, the end portion facing the side surface of the rib portion 14 of the horizontal joint J2 is shielded by the sealing material S. Since the structure of the sealing material S is the same as that shown in the first embodiment, a detailed description is omitted.

本実施形態の床版の接合構造２によれば、横目地Ｊ２が傾斜しているため、充填材３０を充填する際に、横目地Ｊ２内の空気が上方に抜けて空気溜まりの発生が防止される。   According to the floor slab joining structure 2 of the present embodiment, since the horizontal joint J2 is inclined, when the filler 30 is filled, the air in the horizontal joint J2 escapes upward to prevent the accumulation of air. Is done.

また、床版部材１０同士の接合部の下面に、接合面（目地）が露出しておらず、張出部が引張抵抗材として機能することで、接合部の下縁において目開きが生じることはない。
また、床版に導入されたプレストレスにより縦目地Ｊ１における接合面に摩擦力が働くため、上下方向のずれが生じ難くなり、ひいては、横目地Ｊ２における目開きも生じ難くなる。 In addition, the joint surface (joint) is not exposed on the lower surface of the joint portion between the floor slab members 10, and the overhang portion functions as a tensile resistance material, so that an opening is generated at the lower edge of the joint portion. There is no.
Further, since the frictional force acts on the joint surface at the vertical joint J1 due to the prestress introduced into the floor slab, it is difficult for the vertical displacement to occur, and consequently the opening at the horizontal joint J2 is also difficult to occur.

本実施形態の床版の接合構造２によれば、橋軸方向に対して直角方向にリブ部１４が形成されているため、このリブ１４により、第一の実施の形態の床版の接合構造１と同様の作用効果を得ることができる。   According to the floor slab joining structure 2 of the present embodiment, the rib portion 14 is formed in a direction perpendicular to the bridge axis direction, so that the rib 14 provides the floor slab joining structure of the first embodiment. The same effect as 1 can be obtained.

充填材３０を充填する際に設置する型枠としては、リブ部１４の両端面に設置するものだけでよく、リブ部１４の長手方向（紙面垂直方向）に沿って配置する型枠は省略または低減することができる。そのため、従来の接合構造と比較して、大幅に型枠の数量を削減することが可能となり、早期施工および施工費の削減が可能となる。   As the mold to be installed when filling the filler 30, it is only necessary to install it on both end faces of the rib portion 14, and the mold to be arranged along the longitudinal direction (perpendicular to the paper surface) of the rib portion 14 is omitted or Can be reduced. Therefore, compared with the conventional joining structure, it becomes possible to reduce the quantity of a formwork significantly, and early construction and reduction of construction cost are attained.

なお、床版部材１０の端面、張出部１２の上面および増厚部１３の下面は、必ずしも平面に形成されている必要はなく、曲面や多角形面であってもよい。   Note that the end surface of the floor slab member 10, the upper surface of the overhanging portion 12, and the lower surface of the thickening portion 13 do not necessarily have to be formed flat, and may be curved surfaces or polygonal surfaces.

＜第三の実施の形態＞
第三の実施の形態に係る床版の接合構造３は、図５に示すように、隣り合う床版部材１０（第一床版部材１０ａおよび第二床版部材１０ｂ）の端面同士を突き合せた状態で接合するものである。 <Third embodiment>
As shown in FIG. 5, the floor slab joining structure 3 according to the third embodiment butts end surfaces of adjacent floor slab members 10 (first floor slab member 10 a and second floor slab member 10 b). It joins in the state.

第一床版部材１０ａは、版状の本体部１１の端部に形成された張出部１２を備えており、第二床版部材１０ｂは、本体部１１の端部に形成された増厚部１３を備えている。   The first floor slab member 10 a includes an overhanging portion 12 formed at the end of the plate-shaped main body 11, and the second floor slab member 10 b is a thickened formed at the end of the main body 11. Part 13 is provided.

張出部１２および増厚部１３の構成は、第二の実施の形態で示した内容と同様なため、詳細な説明は省略する。   Since the structure of the overhang | projection part 12 and the thickening part 13 is the same as that of the content shown in 2nd Embodiment, detailed description is abbreviate | omitted.

本実施形態では、床版部材１０の一方の端部に凸部１７が形成されているとともに、他方の端部に凹部１５が形成されている。   In the present embodiment, the convex portion 17 is formed at one end portion of the floor slab member 10 and the concave portion 15 is formed at the other end portion.

第一床版部材１０ａと第二床版部材１０ｂの接合は、図５に示すように、互いの端面同士を突き合わせるとともに、第一床版部材１０ａの張出部１２（一方の端部）と第二床版部材１０ｂの増厚部１３（他方の端部）とを重ね合わせることにより行う。   As shown in FIG. 5, the joining of the first floor slab member 10a and the second floor slab member 10b abuts each other's end faces, and overhangs 12 (one end) of the first floor slab member 10a. And the thickened portion 13 (the other end) of the second floor slab member 10b are overlapped.

張出部１２と増厚部１３とを重ね合わせると、床版部材１０同士の接合部において、床版の部材厚を下方向に増厚するリブ部１４が橋軸方向と直交するように形成される。   When the overhanging portion 12 and the thickening portion 13 are overlapped, the rib portion 14 that increases the member thickness of the floor slab downward is formed so as to be orthogonal to the bridge axis direction at the joint portion between the floor slab members 10. Is done.

第一床版部材１０ａの本体部１２の端面と第二床版部材１０ｂの端面との間には縦目地Ｊ１が形成されており、第一床版部材１０ａの張出部１３（第二片１３ｂ）の上面と第二床版部材１０ｂの増厚部１３の下面との間には横目地Ｊ２が形成されている。
縦目地Ｊ１と横目地Ｊ２は、側面視Ｌ字状に連続している。 A vertical joint J1 is formed between the end surface of the main body 12 of the first floor slab member 10a and the end surface of the second floor slab member 10b, and the overhanging portion 13 (second piece) of the first floor slab member 10a is formed. A horizontal joint J2 is formed between the upper surface of 13b) and the lower surface of the thickened portion 13 of the second floor slab member 10b.
The vertical joint J1 and the horizontal joint J2 are continuous in an L shape in a side view.

第一床版部材１０ａの端面に形成された凸部１７と第二床版部材１０ｂの端面に形成された凹部１５は、縦目地Ｊ１を挟んで対峙していて、凹部１５は凸部１７に入り込んでいる。   The convex portion 17 formed on the end surface of the first floor slab member 10a and the concave portion 15 formed on the end surface of the second floor slab member 10b are opposed to each other across the vertical joint J1, and the concave portion 15 is formed on the convex portion 17. It has entered.

縦目地Ｊ１および横目地Ｊ２には接着剤３１（充填材）が充填されている。接着剤３１の種類は限定されるものではないが、例えばエポキシ系やアクリル系の接着剤を使用すればよい。   The vertical joint J1 and the horizontal joint J2 are filled with an adhesive 31 (filler). The type of the adhesive 31 is not limited. For example, an epoxy or acrylic adhesive may be used.

本実施形態の床版の接合構造３の施工は、以下の手順により行う。
まず、主桁２０上に配設された第一床版部材１０ａに隣接して、第二床版部材１０ｂを配置する（図１参照）。このとき、第一床版部材１０ａの接合面（本体部１１の端面や張出部１２の上面等）には、接着剤３１を予め塗布しておく。なお、接着剤３１は、第二床版部材１０ｂの接合面に塗布しておいてもよいし、第一床版部材１０ａおよび第二床版部材１０ｂの両方に塗布してもよい。 The construction of the floor slab joining structure 3 of the present embodiment is performed according to the following procedure.
First, the 2nd floor slab member 10b is arrange | positioned adjacent to the 1st floor slab member 10a arrange | positioned on the main girder 20 (refer FIG. 1). At this time, the adhesive 31 is preliminarily applied to the joint surface of the first floor slab member 10a (the end surface of the main body 11 or the upper surface of the overhanging portion 12). The adhesive 31 may be applied to the joint surface of the second floor slab member 10b, or may be applied to both the first floor slab member 10a and the second floor slab member 10b.

次に、図示せぬ緊張材を緊張し、床版接合部または床版全体に緊張による圧縮応力（プレストレス）を導入する。
これにより、床版部材１０同士が一体に接合された橋梁が形成される。 Next, a tension material (not shown) is tensioned, and compressive stress (prestress) due to tension is introduced into the floor slab joint or the entire floor slab.
Thereby, a bridge in which the floor slab members 10 are joined together is formed.

本実施形態の床版の接合構造３によれば、床版部材１０同士の接合部の下面に、接合面（目地）が露出しておらず、張出部が引張抵抗材として機能することで、接合部の下縁において目開きが生じることはない。   According to the floor slab joining structure 3 of the present embodiment, the joint surface (joint) is not exposed on the lower surface of the joint between the floor slab members 10, and the overhanging portion functions as a tensile resistance material. In addition, no opening occurs at the lower edge of the joint.

また、本実施形態の床版の接合構造３によれば、横目地Ｊ２についても、目開きが生じることはない。
つまり、正の曲げモーメントＭが接合部に作用すると、水平方向の曲げ引張応力は発生するものの、鉛直方向の引張応力は発生しない。そのため、正の曲げモーメントＭによっては、リブ部１４の側面（横目地Ｊ２）における目開きは発生しない。 Further, according to the floor slab joining structure 3 of the present embodiment, no opening is generated in the horizontal joint J2.
That is, when a positive bending moment M acts on the joint, a horizontal bending tensile stress is generated, but a vertical tensile stress is not generated. Therefore, depending on the positive bending moment M, the opening on the side surface (lateral joint J2) of the rib portion 14 does not occur.

また、床版に導入されたプレストレスにより縦目地Ｊ１における接合面に摩擦力が働くため、上下方向のずれが生じ難くなり、ひいては、横目地Ｊ２における目開きも生じ難くなる。さらに、縦目地Ｊ１には、凹部１５に凸部１７が入り込むことにより形成されたせん断キーＫが設けられているため、高いせん断剛性を保持しながらせん断抵抗し、横目地Ｊ２における引張力の発生を抑制することができる。   Further, since the frictional force acts on the joint surface at the vertical joint J1 due to the prestress introduced into the floor slab, it is difficult for the vertical displacement to occur, and consequently the opening at the horizontal joint J2 is also difficult to occur. Further, since the vertical joint J1 is provided with a shear key K formed by the convex portion 17 entering the concave portion 15, the shear resistance is maintained while maintaining high shear rigidity, and the tensile force is generated in the horizontal joint J2. Can be suppressed.

本実施形態の床版の接合構造３によれば、橋軸方向に対して直角方向にリブ部１４が形成されているため、このリブ１４により、第一の実施の形態の床版の接合構造１と同様の作用効果を得ることができる。   According to the floor slab joining structure 3 of the present embodiment, the rib portion 14 is formed in a direction perpendicular to the bridge axis direction. Therefore, the rib 14 provides the floor slab joining structure of the first embodiment. The same effect as 1 can be obtained.

なお、本実施形態では、縦目地Ｊ１に面して凹部１５または凸部１７を形成するものとしたが、横目地Ｊ２に面して凹部１５または凸部１７を形成してもよいし、縦目地Ｊ１と横目地Ｊ２の両方にそれぞれ凹部１５または凸部１７を形成してもよい。   In the present embodiment, the concave portion 15 or the convex portion 17 is formed facing the vertical joint J1, but the concave portion 15 or the convex portion 17 may be formed facing the horizontal joint J2, or the vertical joint J1 may be formed. You may form the recessed part 15 or the convex part 17 in both the joint J1 and the horizontal joint J2, respectively.

＜第四の実施の形態＞
第四の実施の形態に係る床版の接合構造４は、図６に示すように、隣り合う床版部材１０同士（第一床版部材１０ａおよび第二床版部材１０ｂ）の端面同士を突き合せ、床版部材１０，１０の端部に目開き防止部材４０を配置した状態で接合するものである。 <Fourth embodiment>
As shown in FIG. 6, the floor slab joining structure 4 according to the fourth embodiment pushes end surfaces of adjacent floor slab members 10 (first floor slab member 10 a and second floor slab member 10 b). In addition, bonding is performed in a state in which the opening prevention member 40 is arranged at the end of the floor slab members 10 and 10.

第一床版部材１０ａは、版状の本体部１１の端部に形成された張出部１２を備えている。第二床版部材１０ｂは、本体部１１の端部に形成された増厚部１３を備えているとともに、端部（本体部１１および増厚部１３）を上下に貫通する貫通孔１８が形成されている。   The first floor slab member 10 a includes an overhang portion 12 formed at the end of the plate-shaped main body portion 11. The second floor slab member 10b includes a thickened portion 13 formed at an end portion of the main body portion 11, and a through-hole 18 penetrating the end portions (the main body portion 11 and the thickened portion 13) vertically is formed. Has been.

貫通孔１８は、橋軸直角方向に沿って間隔をあけて複数形成されている。
なお、貫通孔１８の形状は限定されるものではない。 A plurality of through holes 18 are formed at intervals along the direction perpendicular to the bridge axis.
The shape of the through hole 18 is not limited.

貫通孔１８の内面には、充填材との付着性を向上させるために、凹凸が設けられているのが望ましい。貫通孔１８の内面に凹凸を形成する場合には、例えば、スパイラルシースを型枠として使用すればよい。   It is desirable that the inner surface of the through hole 18 is provided with unevenness in order to improve adhesion with the filler. In the case where irregularities are formed on the inner surface of the through hole 18, for example, a spiral sheath may be used as a mold.

張出部１２は、第一床版部材１０ａの端部において、本体部１１から第二床版部材１０ｂに向って張り出す部分である。   The overhanging portion 12 is a portion that protrudes from the main body portion 11 toward the second floor slab member 10b at the end of the first floor slab member 10a.

本実施形態の張出部１２は、第二片１２ｂに、橋軸直角方向に連続する溝が形成されていない代わりに、上面が開口する有底の挿入孔１９が形成されている点で、第一の実施の形態の張出部１２と異なっている。   The overhanging portion 12 of the present embodiment is such that a bottomed insertion hole 19 having an open top surface is formed in the second piece 12b instead of a groove continuous in the direction perpendicular to the bridge axis. It differs from the overhang | projection part 12 of 1st embodiment.

挿入孔１９は、貫通孔１８の配置ピッチに応じて形成するものとし、床版部材１０の端面同士を突き合わせた状態で、貫通孔１８の直下に位置するように形成されている。
また、挿入孔１９の深さ（底面の位置）は、第二片１２ｂの下面から所定のコンクリート被り厚さを確保することが可能な大きさとしている。 The insertion holes 19 are formed according to the arrangement pitch of the through holes 18 and are formed so as to be located immediately below the through holes 18 in a state where the end surfaces of the floor slab members 10 are abutted with each other.
Further, the depth of the insertion hole 19 (the position of the bottom surface) is set such that a predetermined concrete covering thickness can be secured from the lower surface of the second piece 12b.

挿入孔１９の内面には、充填材との付着性を向上させるために、凹凸が設けられているのが望ましい。挿入孔１９の内面に凹凸を形成する場合には、例えば、スパイラルシースを型枠として使用すればよい。   It is desirable that the inner surface of the insertion hole 19 is provided with irregularities in order to improve adhesion with the filler. When forming irregularities on the inner surface of the insertion hole 19, for example, a spiral sheath may be used as a mold.

この他の張出部１２の構成は、第一の実施の形態で示した内容と同様なため、詳細な説明は省略する。   Since the structure of the other overhang | projection part 12 is the same as that of the content shown in 1st Embodiment, detailed description is abbreviate | omitted.

増厚部１３は、床版部材１０の他方の端部において、下方向に増厚するように形成された部分である。
本実施形態の増厚部１３は、凹部１５が形成されていない点で、第一の実施の形態の増厚部１３と異なっている。この他の増厚部１３の構成は、第一の実施の形態で示した内容と同様なため、詳細な説明は省略する。 The thickened portion 13 is a portion formed at the other end of the floor slab member 10 so as to increase in thickness downward.
The thickened portion 13 of the present embodiment is different from the thickened portion 13 of the first embodiment in that the concave portion 15 is not formed. Since the structure of the other thickening part 13 is the same as that shown in the first embodiment, detailed description thereof is omitted.

本実施形態では、床版部材１０の端部には、本体部１１の端面に凹部１５が形成されている。なお、凹部１５は必要に応じて形成すればよく、必ずしも形成されている必要はない。   In the present embodiment, a recess 15 is formed on the end surface of the main body 11 at the end of the floor slab member 10. In addition, the recessed part 15 should just be formed as needed, and does not necessarily need to be formed.

目開き防止部材４０は、貫通孔１８と挿入孔１９とに挿入する。このようにすると、目開き防止部材４０の一端が第二床版部材１０ｂに埋設され、他端が第一床版部材１０ａの張出部１２に埋設されるようになる。   The opening preventing member 40 is inserted into the through hole 18 and the insertion hole 19. In this way, one end of the opening prevention member 40 is embedded in the second floor slab member 10b, and the other end is embedded in the overhanging portion 12 of the first floor slab member 10a.

本実施形態は、目開き防止部材４０として、線材４１を主体として構成されたものを使用する。なお、線材としては、鋼材などの金属材料のほか、炭素繊維補強樹脂などの剛性樹脂材料など、選択材料の制限はない。また、充填材との付着性の向上を目的として、異形鉄筋のように表面に凹凸が設けられているのが望ましい。   In the present embodiment, as the opening preventing member 40, a member mainly composed of the wire 41 is used. In addition, as a wire, there is no restriction | limiting of selection materials, such as rigid resin materials, such as carbon fiber reinforcement resin other than metal materials, such as steel materials. Further, for the purpose of improving the adhesion to the filler, it is desirable that the surface is provided with irregularities like a deformed reinforcing bar.

線材４１の両端には、線材４１の直径よりも大きな幅を有した定着材４２，４２が形成されている。なお、定着材４２は、線材４１の長さにより十分な定着長が確保できれば省略してもよいし、一方の端部にのみ形成してもよい。   Fixing materials 42 and 42 having a width larger than the diameter of the wire 41 are formed at both ends of the wire 41. Note that the fixing material 42 may be omitted if a sufficient fixing length can be secured by the length of the wire 41, or may be formed only at one end.

張出部１２と増厚部１３とを重ね合わせることにより、床版部材１０同士の接合部において、床版の部材厚を下方向に増厚するリブ部１４が形成される。つまり、本実施形態の床版の接合構造４では、橋軸方向と直交するリブ部１４が形成されている。   By overlapping the overhanging portion 12 and the thickening portion 13, a rib portion 14 that increases the member thickness of the floor slab downward is formed at the joint portion between the floor slab members 10. That is, in the floor slab joining structure 4 of the present embodiment, the rib portion 14 orthogonal to the bridge axis direction is formed.

第一床版部材１０ａの本体部１２の端面と第二床版部材１０ｂの端面との間には縦目地Ｊ１が形成されており、第一床版部材１０ａの張出部１３（第二片１３ｂ）の上面と第二床版部材１０ｂの増厚部１３の下面との間には横目地Ｊ２が形成されている。
縦目地Ｊ１と横目地Ｊ２は、側面視Ｌ字状に連続している。 A vertical joint J1 is formed between the end surface of the main body 12 of the first floor slab member 10a and the end surface of the second floor slab member 10b, and the overhanging portion 13 (second piece) of the first floor slab member 10a is formed. A horizontal joint J2 is formed between the upper surface of 13b) and the lower surface of the thickened portion 13 of the second floor slab member 10b.
The vertical joint J1 and the horizontal joint J2 are continuous in an L shape in a side view.

第一床版部材１０ａの端面に形成された凹部１５と第二床版部材１０ｂの端面に形成された凹部１５は、縦目地Ｊ１を挟んで対峙している。   The recess 15 formed on the end surface of the first floor slab member 10a and the recess 15 formed on the end surface of the second floor slab member 10b are opposed to each other with the vertical joint J1 interposed therebetween.

縦目地Ｊ１、横目地Ｊ２、凹部１５，１５、貫通孔１８および挿入孔１９には充填材３０が充填されている。また、横目地Ｊ２のリブ部１４の側面に面する端部は、シール材Ｓにより遮蔽されている。
なお、充填材３０およびシール材Ｓの詳細は、第一の実施形態で示したものと同様なため、詳細な説明は省略する。 The vertical joint J1, the horizontal joint J2, the recesses 15 and 15, the through hole 18 and the insertion hole 19 are filled with a filler 30. Further, the end portion facing the side surface of the rib portion 14 of the horizontal joint J2 is shielded by the sealing material S.
Note that details of the filler 30 and the sealing material S are the same as those shown in the first embodiment, and thus detailed description thereof is omitted.

本実施形態の床版の接合構造４の施工は、以下の手順により行う。
まず、主桁２０上に配設された第一床版部材１０ａに隣接して、第二床版部材１０ｂを配置する。このとき、第二床版部材１０ｂは、増厚部１３が第一床版部材１０ａの張出部１２上に位置するように配置する。 The construction of the floor slab joining structure 4 of the present embodiment is performed according to the following procedure.
First, the second floor slab member 10b is disposed adjacent to the first floor slab member 10a disposed on the main beam 20. At this time, the second floor slab member 10b is disposed so that the thickened portion 13 is located on the overhanging portion 12 of the first floor slab member 10a.

次に、第二床版部材１０ｂの上面から貫通孔１８内に目開き防止部材４０を挿入する。目開き防止部材４０の挿入は、貫通孔１８を貫通して、貫通孔１８の直下に形成された挿入孔１９内に下端部が配置されるように行う。   Next, the opening prevention member 40 is inserted into the through hole 18 from the upper surface of the second floor slab member 10b. The opening prevention member 40 is inserted so that the lower end portion is disposed in the insertion hole 19 formed directly below the through hole 18 through the through hole 18.

さらに、縦目地Ｊ１の上面または貫通孔１８の上端から充填材３０を注入し、縦目地Ｊ１、横目地Ｊ２、凹部１５，１５、貫通孔１８および挿入孔１９に充填材３０を充填する。   Further, the filler 30 is injected from the upper surface of the vertical joint J1 or the upper end of the through hole 18, and the vertical joint J1, the horizontal joint J2, the recesses 15 and 15, the through hole 18 and the insertion hole 19 are filled with the filler 30.

充填材３０に所定の強度が発現したら、脱型し、図示せぬ緊張材を緊張することにより、床版接合部または床版全体に圧縮応力（プレストレス）を導入する。
床版部材１０，１０に設けられたシースを挿通する緊張材または橋梁全体にわたって配置された緊張材（外ケーブル）により、床版接合部または床版全体に緊張による圧縮応力を導入する。
これにより、床版部材１０同士が一体に接合された橋梁が形成される。 When the filler 30 has a predetermined strength, it is demolded and a tension material (not shown) is tensioned to introduce compressive stress (prestress) into the floor slab joint or the entire floor slab.
Compressive stress due to tension is introduced into the floor slab joint or the entire floor slab by the tension material inserted through the sheath provided on the floor slab members 10, or the tension material (external cable) disposed over the entire bridge.
Thereby, a bridge in which the floor slab members 10 are joined together is formed.

なお、目開き防止部材４０は、貫通孔１８および挿入孔１９の内部に充填材３０を充填した後に、配置してもよい。こうすることで、目開き防止部材４０の周囲は、貫通孔１８および挿入孔１９の一部に空気溜まりが発生することを防止できる。   The opening preventing member 40 may be disposed after filling the through hole 18 and the insertion hole 19 with the filler 30. By doing so, it is possible to prevent air from being generated around the through hole 18 and the insertion hole 19 around the opening preventing member 40.

本実施形態の床版の接合構造４によれば、目開き防止部材４０が横目地Ｊ２の上下に跨って配設されているため、横目地Ｊ２において目開きが発生することを防止できる。
つまり、床版の厚みに対するリブ部１４の幅と高さの相対比率や、接合部に作用する正の曲げモーメントＭが大きくなることや、経済設計の観点から接合部に付与する緊張力を少なくした場合に、横目地Ｊ２に鉛直方向の引張応力が発生することが想定されるが、このような場合であっても、目開き防止部材４０の引張抵抗力により、目開きを抑制することができる。 According to the floor slab joining structure 4 of the present embodiment, since the mesh opening prevention member 40 is disposed across the top and bottom of the horizontal joint J2, it is possible to prevent the mesh from being generated at the horizontal joint J2.
That is, the relative ratio of the width and height of the rib portion 14 to the thickness of the floor slab, the positive bending moment M acting on the joint portion is increased, and the tension applied to the joint portion is reduced from the viewpoint of economic design. In this case, it is assumed that a vertical tensile stress is generated in the horizontal joint J2, but even in such a case, the opening can be suppressed by the tensile resistance force of the opening preventing member 40. it can.

目開き防止部材４０の配置は、貫通孔１８から差し込むことにより容易に行うことができるため、施工性に優れている。   Since arrangement | positioning of the opening prevention member 40 can be easily performed by inserting from the through-hole 18, it is excellent in workability.

この他の第四の実施の形態に係る床版の接合構造４の作用効果は、第一の実施の形態と同様なため、詳細な説明は省略する。   Since the operational effects of the floor slab joining structure 4 according to the other fourth embodiment are the same as those of the first embodiment, detailed description thereof is omitted.

＜第五の実施の形態＞
第五の実施の形態に係る床版の接合構造５は、図７に示すように、隣り合う床版部材１０同士（第一床版部材１０ａおよび第二床版部材１０ｂ）の端面同士を突き合せた状態で接合するものである。 <Fifth embodiment>
As shown in FIG. 7, the floor slab joining structure 5 according to the fifth embodiment pushes end surfaces of adjacent floor slab members 10 (first floor slab member 10 a and second floor slab member 10 b). They are joined together.

第一床版部材１０ａは、版状の本体部１１の端部に形成された張出部１２を備えている。第二床版部材１０ｂは、本体部１１の端部に形成された増厚部１３を備えている。   The first floor slab member 10 a includes an overhang portion 12 formed at the end of the plate-shaped main body portion 11. The second floor slab member 10 b includes a thickened portion 13 formed at the end of the main body 11.

張出部１２は、第一床版部材１０ａの端部において、本体部１１から第二床版部材１０ｂに向って張り出す部分である。   The overhanging portion 12 is a portion that protrudes from the main body portion 11 toward the second floor slab member 10b at the end of the first floor slab member 10a.

本実施形態の張出部１２は、第二片１２ｂに、橋軸直角方向に連続する溝が形成されていない代わりに、上面が開口する有底の挿入孔１９が形成されている点で、第一の実施の形態の張出部１２と異なっている。   The overhanging portion 12 of the present embodiment is such that a bottomed insertion hole 19 having an open top surface is formed in the second piece 12b instead of a groove continuous in the direction perpendicular to the bridge axis. It differs from the overhang | projection part 12 of 1st embodiment.

本実施形態では、挿入孔１９を所定の間隔により複数形成するが、挿入孔１９のピッチは限定されるものではない。挿入孔１９の深さ（底面の位置）は、第二片１２ｂの下面から所定のコンクリート被り厚さを確保することが可能な大きさとしている。
挿入孔１９の内面には、充填材との付着性を向上させるために、凹凸が設けられているのが望ましい In the present embodiment, a plurality of insertion holes 19 are formed at a predetermined interval, but the pitch of the insertion holes 19 is not limited. The depth of the insertion hole 19 (the position of the bottom surface) is set such that a predetermined concrete covering thickness can be secured from the lower surface of the second piece 12b.
It is desirable that the inner surface of the insertion hole 19 is provided with unevenness in order to improve adhesion with the filler.

この他の張出部１２の構成は、第一の実施の形態で示した内容と同様なため、詳細な説明は省略する。   Since the structure of the other overhang | projection part 12 is the same as that of the content shown in 1st Embodiment, detailed description is abbreviate | omitted.

増厚部１３は、床版部材１０の他方の端部において、下方向に増厚するように形成された部分である。
本実施形態の増厚部１３の下面には、目開き防止部材４０が下方向に突設されている。 The thickened portion 13 is a portion formed at the other end of the floor slab member 10 so as to increase in thickness downward.
On the lower surface of the thickened portion 13 of the present embodiment, an opening preventing member 40 is provided so as to protrude downward.

本実施形態の目開き防止部材４０は、上下２箇所に孔４３，４３が形成された、いわゆる孔あき鋼板により構成されている。なお、目開き防止部材４０に形成される孔４３の数、配置、形状は限定されるものではない。   The opening prevention member 40 of the present embodiment is formed of a so-called perforated steel plate in which holes 43 are formed at two locations on the upper and lower sides. In addition, the number, arrangement | positioning, and shape of the hole 43 formed in the opening prevention member 40 are not limited.

目開き防止部材４０は、第一床版部材１０ａに形成された挿入孔１９と同ピッチにより、一端が第二床版部材１０ｂに埋設されている。
第一床版部材１０ａの張出部１２と第二床版部材１０ｂの増厚部１３とを重ね合わせると、目開き防止部材４０の他端が挿入孔１９に挿入される。つまり、目開き防止部材４０は、一端が第二床版部材１０ｂに埋設されるとともに、他端が第一床版部材１０ａの張出部１２に埋設された状態となる。 The opening preventing member 40 has one end embedded in the second floor slab member 10b at the same pitch as the insertion holes 19 formed in the first floor slab member 10a.
When the overhanging portion 12 of the first floor slab member 10 a and the thickened portion 13 of the second floor slab member 10 b are overlapped, the other end of the opening prevention member 40 is inserted into the insertion hole 19. That is, the opening preventing member 40 is in a state where one end is embedded in the second floor slab member 10b and the other end is embedded in the overhanging portion 12 of the first floor slab member 10a.

張出部１２と増厚部１３とを重ね合わせることにより、床版部材１０同士の接合部において、床版の部材厚を下方向に増厚するリブ部１４が形成される。つまり、本実施形態の床版の接合構造５では、橋軸方向と直交するリブ部１４が形成されている。   By overlapping the overhanging portion 12 and the thickening portion 13, a rib portion 14 that increases the member thickness of the floor slab downward is formed at the joint portion between the floor slab members 10. That is, in the floor slab joining structure 5 of the present embodiment, the rib portion 14 orthogonal to the bridge axis direction is formed.

第一床版部材１０ａの本体部１２の端面と第二床版部材１０ｂの端面との間には縦目地Ｊ１が形成されており、第一床版部材１０ａの張出部１３（第二片１３ｂ）の上面と第二床版部材１０ｂの増厚部１３の下面との間には横目地Ｊ２が形成されている。
縦目地Ｊ１と横目地Ｊ２は、側面視Ｌ字状に連続している。 A vertical joint J1 is formed between the end surface of the main body 12 of the first floor slab member 10a and the end surface of the second floor slab member 10b, and the overhanging portion 13 (second piece) of the first floor slab member 10a is formed. A horizontal joint J2 is formed between the upper surface of 13b) and the lower surface of the thickened portion 13 of the second floor slab member 10b.
The vertical joint J1 and the horizontal joint J2 are continuous in an L shape in a side view.

縦目地Ｊ１、横目地Ｊ２および挿入孔１９には充填材３０が充填されている。また、横目地Ｊ２のリブ部１４の側面に面する端部は、シール材Ｓにより遮蔽されている。
なお、充填材３０およびシール材Ｓの詳細は、第一の実施形態で示したものと同様なため、詳細な説明は省略する。 The vertical joint J1, the horizontal joint J2, and the insertion hole 19 are filled with a filler 30. Further, the end portion facing the side surface of the rib portion 14 of the horizontal joint J2 is shielded by the sealing material S.
Note that details of the filler 30 and the sealing material S are the same as those shown in the first embodiment, and thus detailed description thereof is omitted.

本実施形態の床版の接合構造５の施工は、以下の手順により行う。
まず、主桁２０上に配設された第一床版部材１０ａに隣接して、第二床版部材１０ｂを配置する。このとき、第二床版部材１０ｂは、増厚部１３が第一床版部材１０ａの張出部１２上に位置するように配置する。 Construction of the floor slab joining structure 5 of the present embodiment is performed according to the following procedure.
First, the second floor slab member 10b is disposed adjacent to the first floor slab member 10a disposed on the main beam 20. At this time, the second floor slab member 10b is disposed so that the thickened portion 13 is located on the overhanging portion 12 of the first floor slab member 10a.

次に、縦目地Ｊ１の上面から充填材３０を注入し、縦目地Ｊ１、横目地Ｊ２および挿入孔１９に充填材３０を充填する。   Next, the filler 30 is injected from the upper surface of the vertical joint J1, and the vertical joint J1, the horizontal joint J2, and the insertion hole 19 are filled with the filler 30.

充填材３０に所定の強度が発現したら、脱型し、図示せぬ緊張材を緊張し、床版接合部または床版全体に圧縮応力（プレストレス）を導入する。
これにより、床版部材１０同士が一体に接合された橋梁が形成される。 When a predetermined strength is developed in the filler 30, the mold is removed, a tension material (not shown) is tensioned, and compressive stress (pre-stress) is introduced into the floor slab joint or the entire floor slab.
Thereby, a bridge in which the floor slab members 10 are joined together is formed.

本実施形態の床版の接合構造５によれば、目開き防止部材４０が横目地Ｊ２の上下に跨って配設されているため、横目地Ｊ２において目開きが発生することを防止できる。
この他の第五の実施の形態に係る床版の接合構造５の作用効果は、第一の実施の形態と同様なため、詳細な説明は省略する。 According to the floor slab bonding structure 5 of the present embodiment, since the mesh opening prevention member 40 is disposed across the top and bottom of the horizontal joint J2, it is possible to prevent the opening from occurring at the horizontal joint J2.
Since the operational effects of the floor slab joining structure 5 according to the other fifth embodiment are the same as those of the first embodiment, detailed description thereof is omitted.

以上、本発明について、好適な実施形態について説明した。しかし、本発明は、前述の各実施形態に限られず、前記の各構成要素については、本発明の趣旨を逸脱しない範囲で適宜変更が可能である。   The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above-described embodiments, and the above-described constituent elements can be appropriately changed without departing from the spirit of the present invention.

例えば、前記各実施形態では、橋梁を構築する場合について説明したが、本発明の床版の接合構造により構築される構造物は限定されるものではない。例えば、人工地盤を構築する場合に採用してもよい。   For example, in each of the above-described embodiments, the case where a bridge is constructed has been described. However, the structure constructed by the joint structure of floor slabs of the present invention is not limited. For example, you may employ | adopt when constructing an artificial ground.

前記各実施形態では、一方の端部に張出部、他方の端部に増厚部を備える床版部材を接合する場合について説明したが、両端部に張出部を備える床版部材と両端部に増厚部を備える床版部材とを交互に配置して接合してもよい。
また、床版部材は、必ずしも増厚部を備えていなくてもよい。 In each of the above embodiments, the case where the floor slab member provided with the overhanging portion at one end and the thickening portion at the other end is joined is explained. Alternatively, floor slab members having thickened portions may be alternately arranged and joined.
Moreover, the floor slab member does not necessarily have to have a thickened portion.

前記各実施形態では、縦目地と横目地とがＬ字状に連続している場合について説明したが、目地の形状はこれに限定されるものではない。例えば、縦目地と横目地により円弧状に連続した目地が形成されていてもよい。また、縦目地と横目地は直角に交わる必要もない。
また、第一床版部材と第二床版部材との当接面は、必ずしも平行に形成されている必要はない。 In each of the embodiments described above, the case where the vertical joint and the horizontal joint are continuous in an L shape has been described, but the shape of the joint is not limited to this. For example, joints that are continuous in an arc shape may be formed by vertical joints and horizontal joints. In addition, the vertical joint and the horizontal joint do not need to intersect at a right angle.
Further, the contact surfaces of the first floor slab member and the second floor slab member are not necessarily formed in parallel.

また、縦目地および横目地は直線状である必要はなく、例えば、円弧状に形成されていてもよいし、波型に形成されていてもよく、その形状は限定されるものではない。
さらに、縦目地および横目地は、垂直または水平である必要はなく、傾斜していてもよい。 Further, the vertical joint and the horizontal joint need not be linear, and may be formed in, for example, an arc shape or a corrugated shape, and the shape thereof is not limited.
Further, the vertical joint and the horizontal joint need not be vertical or horizontal, and may be inclined.

１，２，３，４，５ 床版の接合構造
１０ 床版部材
１０ａ 第一床版部材
１０ｂ 第二床版部材
１１ 本体部
１２ 張出部
１５ 凹部
１７ 凸部
１８ 貫通孔
１９ 挿入孔
３０ 充填材
４０ 目開き防止部材
Ｊ１ 縦目地
Ｊ２ 横目地
Ｋ せん断キー 1, 2, 3, 4, 5 Floor slab joint structure 10 Floor slab member 10a First floor slab member 10b Second floor slab member 11 Main body part 12 Overhang part 15 Concave part 17 Convex part 18 Through hole 19 Insertion hole 30 Filling Material 40 Opening prevention member J1 Longitudinal joint J2 Horizontal joint K Shear key

Claims (5)

第一床版部材および第二床版部材の端面同士を突き合せた状態で接合する床版の接合構造であって、
前記第一床版部材は、その本体部から前記第二床版部材に向って張り出す張出部を有し、
前記第一床版部材の本体部の端面と前記第二床版部材の端面との間に縦目地が形成されており、
前記第一床版部材の張出部の上面と前記第二床版部材の下面との間に横目地が形成されており、
前記縦目地および前記横目地には充填材が充填されており、
前記縦目地および前記横目地は連続しており、
前記縦目地の上端と前記横目地の先端が外面に面していることを特徴とする、床版の接合構造。 A joining structure of floor slabs to be joined in a state in which the end faces of the first floor slab member and the second floor slab member are butted together,
The first floor slab member has a projecting portion that projects from the main body portion toward the second floor slab member,
A vertical joint is formed between the end surface of the main body portion of the first floor slab member and the end surface of the second floor slab member,
A horizontal joint is formed between the upper surface of the overhanging portion of the first floor slab member and the lower surface of the second floor slab member,
The vertical joint and the horizontal joint are filled with a filler,
The vertical joint and the horizontal joint are continuous,
The joining structure of floor slabs characterized in that an upper end of the vertical joint and a tip of the horizontal joint face the outer surface. 前記第一床版部材および前記第二床版部材のそれぞれに凹部が形成されており、
前記両凹部は、前記縦目地または前記横目地を挟んで対峙していて、
前記各凹部には、前記充填材が充填されていることを特徴とする、請求項１に記載の床版の接合構造。 A recess is formed in each of the first floor slab member and the second floor slab member,
The both concave portions face each other across the vertical joint or the horizontal joint,
The floor slab joining structure according to claim 1, wherein each of the recesses is filled with the filler. 前記第一床版部材および前記第二床版部材の一方に凹部が形成されているとともに他方に凸部が形成されており、
前記凹部および前記凸部は、前記縦目地または前記横目地を挟んで対峙していて、
前記凹部に前記凸部が入り込んでいることを特徴とする、請求項１に記載の床版の接合構造。 A concave portion is formed on one of the first floor slab member and the second floor slab member and a convex portion is formed on the other,
The concave portion and the convex portion face each other across the vertical joint or the horizontal joint,
2. The floor slab joining structure according to claim 1, wherein the convex portion enters the concave portion. 前記第二床版部材の端部には、これを上下に貫通する貫通孔が形成されており、
前記第一床版部材の張出部には、その上面が開口する有底の挿入孔が形成されており、
前記挿入孔は、前記貫通孔の直下に位置し、
前記挿入孔および前記貫通孔に目開き防止部材が挿入されていることを特徴とする、請求項１乃至請求項３のいずれか１項に記載の床版の接合構造。 The end of the second floor slab member is formed with a through hole penetrating up and down,
The overhanging portion of the first floor slab member has a bottomed insertion hole whose upper surface is open,
The insertion hole is located immediately below the through hole,
4. The floor slab joining structure according to claim 1, wherein an opening preventing member is inserted into the insertion hole and the through hole. 5. 一端が前記第二床版部材に埋設されて、他端が前記第一床版部材の張出部に埋設された目開き防止部材を備えることを特徴とする、請求項１乃至請求項４のいずれか１項に記載の床版の接合構造。   5. The opening prevention member having one end embedded in the second floor slab member and the other end embedded in an overhanging portion of the first floor slab member. The joint structure of floor slabs according to any one of the above.
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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015001045A (en) * 2013-06-13 2015-01-05 川田建設株式会社 Joint structure of precast concrete floor slab
JP2016204925A (en) * 2015-04-20 2016-12-08 大成建設株式会社 Prestressed Concrete Slab
JP2020125675A (en) * 2020-03-24 2020-08-20 大成建設株式会社 Pre-stressed concrete floor slab and construction method for floor slab using pre-stressed concrete floor slab
KR102487497B1 (en) * 2022-09-30 2023-01-10 유광종 Bridge deck construction structure and method using a precast deck
JP7285606B1 (en) 2021-11-22 2023-06-02 カナフレックスコーポレーション株式会社 Floor slab connection structure for roads
JP2023110899A (en) * 2022-01-28 2023-08-09 東急建設株式会社 Precast concrete slab joint
JP7477081B2 (en) 2020-08-11 2024-05-01 カナフレックスコーポレーション株式会社 Bridge Structure

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JPS5833501U (en) * 1981-08-28 1983-03-04 石川島建材工業株式会社 concrete floor slab

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JPS5833501U (en) * 1981-08-28 1983-03-04 石川島建材工業株式会社 concrete floor slab

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015001045A (en) * 2013-06-13 2015-01-05 川田建設株式会社 Joint structure of precast concrete floor slab
JP2016204925A (en) * 2015-04-20 2016-12-08 大成建設株式会社 Prestressed Concrete Slab
JP2020125675A (en) * 2020-03-24 2020-08-20 大成建設株式会社 Pre-stressed concrete floor slab and construction method for floor slab using pre-stressed concrete floor slab
JP7477081B2 (en) 2020-08-11 2024-05-01 カナフレックスコーポレーション株式会社 Bridge Structure
JP7285606B1 (en) 2021-11-22 2023-06-02 カナフレックスコーポレーション株式会社 Floor slab connection structure for roads
JP2023081396A (en) * 2021-11-22 2023-06-12 カナフレックスコーポレーション株式会社 Floor slab connection structure for road
JP2023110899A (en) * 2022-01-28 2023-08-09 東急建設株式会社 Precast concrete slab joint
JP7385064B2 (en) 2022-01-28 2023-11-21 東急建設株式会社 Precast concrete plate fittings
KR102487497B1 (en) * 2022-09-30 2023-01-10 유광종 Bridge deck construction structure and method using a precast deck
KR102487499B1 (en) * 2022-09-30 2023-01-10 유광종 Bridge deck construction structure and method using a precast deck set

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