JP2018119333A - Precast concrete block joint structure and precast concrete block joint structure body - Google Patents

Precast concrete block joint structure and precast concrete block joint structure body Download PDF

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JP2018119333A
JP2018119333A JP2017012215A JP2017012215A JP2018119333A JP 2018119333 A JP2018119333 A JP 2018119333A JP 2017012215 A JP2017012215 A JP 2017012215A JP 2017012215 A JP2017012215 A JP 2017012215A JP 2018119333 A JP2018119333 A JP 2018119333A
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precast concrete
joint
concrete block
joint structure
male
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JP6820208B2 (en
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英貞 金治
Hidesada Kaneharu
英貞 金治
勉 新名
Tsutomu Niina
勉 新名
惺 谷口
Satoshi Taniguchi
惺 谷口
崇 小坂
Takashi Kosaka
崇 小坂
輿石 正己
Masami Koshiishi
正己 輿石
顕 小林
Akira Kobayashi
顕 小林
宮田 勝治
Katsuharu Miyata
勝治 宮田
昭男 陶
Akio To
昭男 陶
松原 喜之
Yoshiyuki Matsubara
喜之 松原
西野 元庸
Motoyasu Nishino
元庸 西野
優嗣 国井
Yuji Kunii
優嗣 国井
考志 大坪
Takashi Otsubo
考志 大坪
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Shimizu Construction Co Ltd
Sumitomo SEI Steel Wire Corp
Unytite Corp
Shimizu Corp
Showa Concrete Industry Co Ltd
Hanshin Expressway Co Ltd
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Shimizu Construction Co Ltd
Sumitomo SEI Steel Wire Corp
Unytite Corp
Shimizu Corp
Showa Concrete Industry Co Ltd
Hanshin Expressway Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a precast concrete block joint structure and a precast concrete block joint structure body provided with the same with which it is possible to construct a precast concrete block joint structure body for a bridge floor slab and the like more efficiently than the conventional art, and with which it is possible to increase the degree of freedom for specifying its thickness.SOLUTION: A precast concrete block joint structure comprises: a male joint 10 integrally embedded in one precast concrete block 2 in a state where a fitting protruding part 13 protrudes from a joint end surface of the one precast concrete block 2, and a female joint 11 integrally embedded in the other precast concrete block 2 in a state where an opening part of a fitting recessed part 17 is opened on a joint end surface of the other precast concrete block 2. The fitting protruding part 13 of the male joint 10 and the fitting recessed part 17 of the female joint 11 on the precast concrete blocks 2 are fittingly connected to each other such that the adjacent precast concrete blocks 2 are connected together.SELECTED DRAWING: Figure 2

Description

本発明は、プレキャストコンクリートブロックの接合部構造及びプレキャストコンクリートブロックの接合構造体に関する。   The present invention relates to a joint structure of a precast concrete block and a joint structure of a precast concrete block.

橋梁の床版を構築する手法の一つとして、例えば図5及び図6に示すように鋼製桁1上に複数のプレキャストコンクリート床版(プレキャストコンクリートブロック)2を敷き並べ、隣り合うプレキャストコンクリート床版2の端部の間(接合部S)にコンクリート3を打設して一体形成する手法が知られている。   As one of the methods for building a bridge slab, for example, as shown in FIGS. 5 and 6, a plurality of precast concrete floor slabs (precast concrete blocks) 2 are arranged on a steel girder 1 and adjacent precast concrete floors are arranged. A technique is known in which concrete 3 is cast between the end portions of the plate 2 (joint portion S) to form them integrally.

また、各プレキャストコンクリート床版2は、例えば、床版本体2aの接合端面から突出するループ状継手4を設けて形成され、各プレキャストコンクリート床版2の鋼製桁1と重なる部分に貫通孔2bを設けて形成される。   Each precast concrete floor slab 2 is formed, for example, by providing a loop-like joint 4 protruding from the joint end face of the floor slab body 2a, and a through hole 2b is formed in a portion overlapping each steel girder 1 of each precast concrete floor slab 2. Is formed.

そして、橋梁の床版(プレキャストコンクリートブロックの接合構造体)を構築する際に、鋼製桁1の上フランジに植設したスタッドを貫通孔2bに挿通させつつ複数のプレキャストコンクリート床版2を所定位置に敷き並べる。この状態で、互いに隣り合うプレキャストコンクリート床版2の接合端面から突出するループ状継手4が橋軸直交方向の幅方向に重なり合い、これらループ状継手4の内部に補強鉄筋(配力筋)5を取り付ける。   When building a bridge floor slab (a precast concrete block joint structure), a plurality of precast concrete floor slabs 2 are predetermined while inserting studs embedded in the upper flange of the steel girder 1 into the through holes 2b. Lay out in position. In this state, the loop joints 4 protruding from the joint end surfaces of the precast concrete slabs 2 adjacent to each other overlap in the width direction in the direction perpendicular to the bridge axis, and reinforcing reinforcing bars (distribution bars) 5 are provided inside the loop joints 4. Install.

最後に、スタッドを挿通した貫通孔2bに無収縮モルタルを充填し、さらに隣り合うプレキャストコンクリート床版2の間の接合部Sにそれぞれ間詰めコンクリート3を充填することにより、隣り合うプレキャストコンクリート床版2同士、複数のプレキャストコンクリート床版2と鋼製桁1を一体に接合してなる橋梁の床版を構築することができる(例えば、特許文献1、特許文献2、特許文献3参照)。   Finally, the non-shrinkage mortar is filled in the through-hole 2b through which the stud is inserted, and the space between the adjacent precast concrete floor slabs 2 is filled with the interstitial concrete 3 to thereby adjoin the precast concrete floor slabs. It is possible to construct a bridge floor slab in which two, a plurality of precast concrete floor slabs 2 and a steel girder 1 are integrally joined (see, for example, Patent Document 1, Patent Document 2, and Patent Document 3).

特開2012−26088号公報JP 2012-26088 A 特開2010−236258号公報JP 2010-236258 A 特開2009−264040号公報JP 2009-264040 A

しかしながら、上記従来の橋梁の床版においては、ループ状継手と間詰めコンクリートを用いて隣り合うプレキャストコンクリート床版を接合するため、ループ状継手(継手部)によって床版厚が決まる。すなわち、ループ状継手は、重ね継手よりも継手長を短くすることができるという大きな利点を有する反面、そのループ形状に応じて床版厚を設定せざるを得ず、一般に床版厚が大きくなる。   However, in the conventional bridge floor slab, the adjacent precast concrete floor slabs are joined using the loop joint and the interstitial concrete, and therefore the floor slab thickness is determined by the loop joint (joint portion). That is, the loop-shaped joint has a great advantage that the joint length can be made shorter than that of the lap joint, but the floor slab thickness must be set according to the loop shape, and the floor slab thickness generally increases. .

また、ループ状継手内への補強鉄筋の設置、間詰コンクリートの打設、養生などの現場作業が必要であり、現場作業を極力減らし、施工性のさらなる向上を図ることが強く求められていた。   In addition, field work such as installation of reinforcing bars in loop joints, placement of intercalated concrete, and curing is necessary, and there was a strong demand to further reduce work on site and further improve workability. .

本発明は、上記事情に鑑み、従来より効率的に橋梁の床版などのプレキャストコンクリートブロックの接合構造体を構築することを可能にするとともにその厚さの設定自由度を高めることを可能にするプレキャストコンクリートブロックの接合部構造及びこれを備えたプレキャストコンクリートブロックの接合構造体を提供することを目的とする。   In view of the above circumstances, the present invention makes it possible to construct a joint structure of a precast concrete block such as a floor slab of a bridge more efficiently than before and increase the degree of freedom of setting the thickness thereof. It is an object of the present invention to provide a joint structure for a precast concrete block and a joint structure for a precast concrete block including the joint structure.

上記の目的を達するために、この発明は以下の手段を提供している。   In order to achieve the above object, the present invention provides the following means.

本発明のプレキャストコンクリートブロックの接合部構造は、隣り合う一方のプレキャストコンクリートブロックの接合端面から嵌合凸部を突出させた状態で一方のプレキャストコンクリートブロックに一体に埋設される雄継手と、隣り合う他方のプレキャストコンクリートブロックの接合端面に嵌合凹部の開口部を開口させた状態で他方のプレキャストコンクリートブロックに一体に埋設される雌継手とを備え、且つ、前記雄継手が、棒状の雄側軸部と、前記雄側軸部の先端から軸線方向外側に突出する棒状の前記嵌合凸部と、前記雄側軸部の後端側に螺着されるナットと、前記雄側軸部の外周を被覆するように取り付けられる筒状体とを備え、前記雌継手が、後部側に小径部、前部側に大径部を設けて形成された筒状の前記嵌合凹部と、棒状の雌側軸部、前記雌側軸部の先端側に設けられ、前記嵌合凹部の小径部の内面に施された雌ネジに螺合させる雄ネジ部、前記雌側軸部の後端側に設けられた定着部からなる定着ボルトと、前記嵌合凹部の大径部の内部に挿入配置される筒状の介装材と、軸線方向先端側から後端側に向かうに従い漸次その外径が大となるように形成され、先端側を前記介装材の後端側の内孔に嵌合させつつ前記嵌合凹部の大径部の内部に挿入配置されくさび材と、前記嵌合凹部の内部に配設されるとともに、前記嵌合凹部の大径部、小径部を繋ぐ段部と前記くさび材の後端との間に配設される環状のバネ部材とを備え、隣り合うプレキャストコンクリートブロックの互いの前記雄継手の嵌合凸部と前記雌継手の嵌合凹部とが嵌合接続され、隣り合うプレキャストコンクリートブロック同士が接合されるように構成されていることを特徴とする。   The joint structure of the precast concrete block according to the present invention is adjacent to a male joint embedded integrally in one precast concrete block in a state in which a fitting convex portion protrudes from a joint end surface of one adjacent precast concrete block. A female joint embedded in the other precast concrete block in a state in which the opening of the fitting recess is opened on the joint end surface of the other precast concrete block, and the male joint is a rod-shaped male side shaft , A rod-shaped fitting convex portion that protrudes axially outward from the tip of the male shaft portion, a nut that is screwed to the rear end side of the male shaft portion, and an outer periphery of the male shaft portion A cylindrical body that is attached so as to cover the cylindrical joint, and the female joint is formed with a small-diameter portion on the rear side and a large-diameter portion on the front side, and the cylindrical fitting recess, A female-side shaft portion, a male screw portion provided on the distal end side of the female-side shaft portion and screwed into a female screw applied to the inner surface of the small-diameter portion of the fitting recess, and a rear end of the female-side shaft portion A fixing bolt comprising a fixing portion provided on the side, a cylindrical interposing material inserted and disposed inside the large-diameter portion of the fitting recess, and gradually outward from the front end side in the axial direction toward the rear end side. A wedge material that is formed to have a large diameter and is inserted and arranged inside the large-diameter portion of the fitting recess while fitting the front end side into the inner hole on the rear end side of the interposition material, and the fitting An annular spring member is provided adjacent to and disposed between the stepped portion connecting the large diameter portion and the small diameter portion of the fitting concave portion and the rear end of the wedge material. The fitting projections of the male joints and the fitting depressions of the female joints of the precast concrete block are fitted and connected to each other. Wherein the strike concrete block each other are configured to be joined.

また、本発明のプレキャストコンクリートブロックの接合部構造においては、前記雄側軸部と前記筒状体の隙間にプレグラウト樹脂が注入されていることが望ましい。   In the precast concrete block joint structure according to the present invention, it is desirable that pregrout resin is injected into the gap between the male shaft portion and the tubular body.

本発明のプレキャストコンクリートブロックの接合構造体は、上記のいずれかのプレキャストコンクリートブロックの接合部構造を備え、隣り合うプレキャストコンクリートブロック同士が前記プレキャストコンクリートブロックの接合部構造で接合されていることを特徴とする。   The precast concrete block joint structure of the present invention comprises any one of the above-mentioned precast concrete block joint structures, and adjacent precast concrete blocks are joined by the precast concrete block joint structure. And

また、本発明のプレキャストコンクリートブロックの接合構造体においては、前記雄継手と前記雌継手が、隣り合うプレキャストコンクリートブロックの接合端面同士を密着させる方向の軸力を付加して接続されてなることが望ましい。   Moreover, in the joint structure of the precast concrete block of the present invention, the male joint and the female joint may be connected by applying an axial force in a direction in which the joint end surfaces of adjacent precast concrete blocks are brought into close contact with each other. desirable.

さらに、本発明のプレキャストコンクリートブロックの接合構造体においては、前記プレキャストコンクリートブロックがプレキャストコンクリート床版であることが望ましい。   Furthermore, in the bonded structure of precast concrete blocks of the present invention, it is desirable that the precast concrete block is a precast concrete floor slab.

本発明のプレキャストコンクリートブロックの接合部構造及びこれを備えたプレキャストコンクリートブロックの接合構造体においては、順次プレキャストコンクリートブロックを設置するとともにスライド移動させ、隣り合うプレキャストコンクリートブロックに設けられた雄継手と雌継手を嵌合させることにより、互いの接合端面が面接触した好適な状態にして隣り合うプレキャストコンクリートブロックを容易に接合することが可能になる。   In the joint structure of the precast concrete block of the present invention and the joint structure of the precast concrete block having the joint structure, the precast concrete block is sequentially installed and slid, and the male joint and the female provided in the adjacent precast concrete block are provided. By fitting the joints, it is possible to easily join adjacent precast concrete blocks in a suitable state in which the joining end faces are in surface contact.

そして、このように隣り合うプレキャストコンクリートブロックを接合することにより、容易に且つ効率的にプレキャストコンクリートブロックの接合構造体を構築することが可能になる。   And it becomes possible to construct | assemble the joining structure body of a precast concrete block easily and efficiently by joining the adjacent precast concrete block in this way.

また、雄継手と雌継手の嵌合によって隣り合うプレキャストコンクリートブロックを接合できるため、従来のループ状継手を用いた場合のように接合部がその厚さの設定要素となることがなく、設計自由度の高いプレキャストコンクリートブロックの接合構造体を実現できる。   In addition, since adjacent precast concrete blocks can be joined by fitting a male joint and a female joint, the joint does not become a setting factor for the thickness as in the case of using a conventional loop joint, and design freedom is achieved. Highly precast concrete block joint structure can be realized.

本発明の一実施形態に係る橋梁の床版(プレキャストコンクリートブロックの接合構造体)、プレストレストコンクリート床板の接合部構造(プレキャストコンクリートブロックの接合部構造)を示す平面図である。1 is a plan view showing a bridge floor slab (precast concrete block joint structure) and a prestressed concrete floor board joint structure (precast concrete block joint structure) according to an embodiment of the present invention. 本発明の一実施形態に係るプレストレストコンクリート床板の接合部構造(プレキャストコンクリートブロックの接合部構造)を示す断面図である。It is sectional drawing which shows the junction part structure (joint part structure of a precast concrete block) of the prestressed concrete floor board which concerns on one Embodiment of this invention. 本発明の一実施形態に係るプレストレストコンクリート床板の接合部構造(プレキャストコンクリートブロックの接合部構造)の介装材:図3(a)、くさび材:図3(b)、皿バネ(バネ部材):図3(c)の一例を示す図である。Interstitial material of prestressed concrete floor plate joint structure (precast concrete block joint structure) according to an embodiment of the present invention: Fig. 3 (a), wedge material: Fig. 3 (b), disc spring (spring member) : It is a figure which shows an example of FIG.3 (c). 本発明の一実施形態に係る橋梁の床版(プレキャストコンクリートブロックの接合構造体)、接合部構造(プレキャストコンクリートブロックの接合部構造)を示す斜視図である。1 is a perspective view showing a bridge floor slab (a precast concrete block joint structure) and a joint structure (a precast concrete block joint structure) according to an embodiment of the present invention. 従来のループ状継手を用いた橋梁の床版(プレキャストコンクリートブロックの接合構造体)、接合部構造(プレキャストコンクリートブロックの接合部構造)を示す斜視図である。It is a perspective view which shows the floor slab of a bridge (joint structure of a precast concrete block) and junction structure (joint structure of a precast concrete block) using the conventional loop joint. 従来のループ状継手を備えたプレキャストコンクリート床版の接合部構造(プレキャストコンクリートブロックの接合部構造)を示す断面図である。It is sectional drawing which shows the junction part structure (joint part structure of a precast concrete block) of the precast concrete floor slab provided with the conventional loop joint.

以下、図1から図4を参照し、本発明の一実施形態に係るプレキャストコンクリートブロックの接合部構造及びこれを備えたプレキャストコンクリートブロックの接合構造体について説明する。
ここで、本実施形態では、本発明に係るプレキャストコンクリートブロックの接合構造体が道路橋や鉄道橋などの橋梁の床版、本発明に係るプレキャストコンクリートブロックの接合部構造がプレキャストコンクリート床版の接合部構造であるものとして説明を行う。
Hereinafter, a joint structure of a precast concrete block according to an embodiment of the present invention and a joint structure of a precast concrete block including the same will be described with reference to FIGS.
Here, in this embodiment, the joint structure of the precast concrete block according to the present invention is a floor slab of a bridge such as a road bridge or a railway bridge, and the joint structure of the precast concrete block according to the present invention is a joint of a precast concrete floor slab. The description will be made assuming that it is a partial structure.

本実施形態の橋梁の床版(プレキャストコンクリートブロックの接合構造体)Aは、図1から図4に示すように、従来と同様、鋼製桁1上に複数のプレキャストコンクリート床版(プレキャストコンクリートブロック)2を敷き並べ、隣り合うプレキャストコンクリート床版2の端部同士を接合して構成される。   As shown in FIGS. 1 to 4, the bridge floor slab (precast concrete block joint structure) A of the present embodiment has a plurality of precast concrete floor slabs (precast concrete blocks) on a steel girder 1 as in the prior art. ) 2 are arranged and the ends of adjacent precast concrete slabs 2 are joined to each other.

一方、本実施形態のプレキャストコンクリート床版の接合部構造(プレキャストコンクリートブロックの接合部構造)Bは、従来のループ状継手、間詰めコンクリートを用いず、プレストレストコンクリート床版2に雄継手10と雌継手11を設け、隣り合う一方のプレストレストコンクリート床版2の雄継手10と、他方のプレストレストコンクリート床版2の雌継手11と嵌合させて隣り合う一対のプレキャストコンクリート床版2を接合するように構成されている。   On the other hand, the joint structure (precast concrete block joint structure) B of the precast concrete floor slab of this embodiment does not use conventional loop joints or interstitial concrete, but a prestressed concrete floor slab 2 with male joints 10 and female joints. A joint 11 is provided so that a pair of adjacent precast concrete slabs 2 are joined by fitting with a male joint 10 of one adjacent prestressed concrete slab 2 and a female joint 11 of the other prestressed concrete slab 2. It is configured.

より具体的に、本実施形態の雄継手10は、円柱棒状の雄側軸部12と、雄側軸部12の先端から軸線O1方向外側に突出する円柱棒状のピン部(嵌合凸部)13と、雄側軸部12の後端側に螺着されるナット(定着部)14と、支圧板(定着部)25と、雄側軸部12の外周を被覆するように取り付けられる筒状体15と、雄側軸部12と筒状体15の間に充填されるプレグラウト樹脂24とを備えて構成されている。
なお、例えば、筒状体15にはポリエチレン管、プレグラウト樹脂24にはエポキシ樹脂などが用いられる。
More specifically, the male joint 10 of the present embodiment includes a cylindrical rod-shaped male side shaft portion 12 and a cylindrical rod-shaped pin portion (fitting convex portion) that protrudes outward from the tip of the male side shaft portion 12 in the axis O1 direction. 13, a nut (fixing portion) 14 screwed to the rear end side of the male side shaft portion 12, a pressure plate (fixing portion) 25, and a cylindrical shape attached so as to cover the outer periphery of the male side shaft portion 12. The body 15 is provided with a pre-grout resin 24 filled between the male shaft portion 12 and the cylindrical body 15.
For example, a polyethylene pipe is used for the cylindrical body 15, and an epoxy resin or the like is used for the pregrout resin 24.

そして、この雄継手10は、雄側軸部12及び雄側軸部12に取り付けた筒状体15をコンクリートに埋設し、ピン部13を接合端面から直交方向外側に突出させ、プレキャストコンクリート床版2の所定位置に一体に設けられている。   And this male joint 10 embeds the male side shaft portion 12 and the cylindrical body 15 attached to the male side shaft portion 12 in concrete, and projects the pin portion 13 outward in the orthogonal direction from the joining end face, thereby precast concrete floor slab. 2 are integrally provided at predetermined positions.

また、プレキャストコンクリート床版2には、上面(または下面)から上下方向内側に凹む箱抜き部(操作凹部)16が形成され、この箱抜き部16に雄側軸部12の後端側が突出して露出し、ナット14を螺着可能に構成されている。なお、雄継手10は、プレキャストコンクリート床版2の接合端面側に複数設けられている。   Further, the precast concrete floor slab 2 is formed with a box opening portion (operation recess) 16 that is recessed inward in the vertical direction from the upper surface (or lower surface), and the rear end side of the male shaft portion 12 protrudes from the box opening portion 16. The nut 14 is exposed and can be screwed. A plurality of male joints 10 are provided on the joining end face side of the precast concrete slab 2.

本実施形態の雌継手11は、後部側に小径部17a、前部側に大径部17bを設けて形成された略円筒状のケース(嵌合凹部)17と、円柱棒状の雌側軸部18a、雌側軸部18aの先端側に設けられ、ケース17の小径部17aの内面に施された雌ネジに螺合させる雄ネジ部18b、雌側軸部18aの後端側に設けられ、雄継手10の定着部と同様に支圧板25、ナット14(定着部18c)からなる定着ボルト18とを備えている。   The female joint 11 of this embodiment includes a substantially cylindrical case (fitting recess) 17 formed by providing a small-diameter portion 17a on the rear side and a large-diameter portion 17b on the front side, and a cylindrical rod-shaped female-side shaft portion. 18a, provided on the distal end side of the female shaft portion 18a, provided on the rear end side of the female screw portion 18b and the female screw shaft portion 18a to be screwed into the female screw applied to the inner surface of the small diameter portion 17a of the case 17, Similar to the fixing portion of the male joint 10, a pressure bearing plate 25 and a fixing bolt 18 including a nut 14 (fixing portion 18 c) are provided.

この雌継手11は、定着ボルト18の先端側の雄ネジ部18bを小径部17aに螺合させてケース17と定着ボルト18を一体にし、ケース17の大径部17bの先端の開口部が接合端面に開口するようにして、プレキャストコンクリート床版2の接合端面側に一体に埋設されている。   In this female joint 11, the case 17 and the fixing bolt 18 are integrated by screwing the male screw portion 18b on the tip end side of the fixing bolt 18 into the small diameter portion 17a, and the opening portion at the tip of the large diameter portion 17b of the case 17 is joined. The precast concrete floor slab 2 is integrally embedded on the joining end surface side so as to open to the end surface.

さらに、雌継手11は、ケース17の大径部17bの内径と略同等の外径を備えて円筒状に形成され、大径部17bの内部に挿入配置される略円筒状の介装材19と、軸線O1方向先端側から後端側に向かうに従い漸次その外径が大となるように形成され、先端側を介装材19の後端側の内孔に嵌合させつつケース17の大径部17bの内部に挿入配置されるくさび材20と、ケース17の大径部17bの内部に配設されるとともに、ケース17の大径部17b、小径部17aを繋ぐ段部17cとくさび材20の後端の間に配設される略円環状の皿バネ(バネ部材)21とを備えている。また、くさび材20にはスリット20aが設けられ、雄継手10が押し込まれた際に拡径可能となっている。
なお、図2中の符号23は定着部補強鉄筋を示す。また、図3(a)に介装材19、図3(b)にくさび材20、図3(c)に皿バネ(バネ部材)21の一例をそれぞれ示す。
Furthermore, the female joint 11 is formed in a cylindrical shape having an outer diameter substantially equal to the inner diameter of the large-diameter portion 17b of the case 17 and is inserted into the large-diameter portion 17b. The outer diameter of the case 17 gradually increases as it goes from the front end side to the rear end side in the direction of the axis O1, and the size of the case 17 is increased while fitting the front end side into the inner hole on the rear end side of the interposition material 19. The wedge material 20 inserted and arranged inside the diameter portion 17b, and the stepped portion 17c connecting the large diameter portion 17b and the small diameter portion 17a of the case 17 and the wedge material are arranged inside the large diameter portion 17b of the case 17. 20 is provided with a substantially annular disc spring (spring member) 21 disposed between the rear ends of 20. Moreover, the wedge material 20 is provided with a slit 20a so that the diameter can be increased when the male joint 10 is pushed.
In addition, the code | symbol 23 in FIG. 2 shows a fixing | fixed part reinforcement. FIG. 3A shows an example of the interposing material 19, FIG. 3B shows an example of the wedge material 20, and FIG. 3C shows an example of a disc spring (spring member) 21.

上記構成からなる接合部構造Bを備えた複数のプレキャストコンクリート床版2を鋼製桁1上に敷き並べて橋梁の床版Aを構築する際には、隣り合う一方のプレキャストコンクリート床版2を所定位置に設置された段階で他方のプレキャストコンクリート床版2を鋼製桁1上に載せ、一方のプレキャストコンクリート床版2の横に並設する。   When building a bridge floor slab A by laying a plurality of precast concrete floor slabs 2 having the joint structure B having the above-described structure on a steel girder 1, one precast concrete floor slab 2 is predetermined. The other precast concrete floor slab 2 is placed on the steel girder 1 at the stage of being installed at the position, and is placed side by side next to the one precast concrete floor slab 2.

そして、例えば図4に示すように、ポンプ22a、油圧ジャッキ22b、鋼製ガイド22c等を備えた床版接合装置22を用い、また、プレキャストコンクリート床版2の貫通孔2bを利用し、鋼製ガイド22cでスライド移動方向を制御しつつ油圧ジャッキ22bで一方のプレキャストコンクリート床版2の接合端面に他方のプレキャストコンクリート床版2の接合端面を面接触させるように他方のプレキャストコンクリート床版2をスライド移動させる。   And, for example, as shown in FIG. 4, a floor slab joining device 22 provided with a pump 22a, a hydraulic jack 22b, a steel guide 22c, etc. is used, and a steel plate is made using the through-hole 2b of the precast concrete floor slab 2. The other precast concrete floor slab 2 is slid so that the joint end surface of the other precast concrete floor slab 2 is brought into surface contact with the joint end surface of the other precast concrete floor slab 2 with the hydraulic jack 22b while the slide moving direction is controlled by the guide 22c. Move.

このように他方のプレキャストコンクリート床版2をスライド移動させるとともに、一方のプレキャストコンクリート床版2と他方のプレキャストコンクリート床版2の互いの接合端面側に設けられた雄継手10のピン部13を雌継手11のケース17、くさび材20の先端側に挿入して嵌合させる。   In this way, the other precast concrete floor slab 2 is slid and moved, and the pin portion 13 of the male joint 10 provided on the joint end face side of the one precast concrete floor slab 2 and the other precast concrete floor slab 2 is inserted into the female. It is inserted into the case 17 of the joint 11 and the front end side of the wedge member 20 and fitted.

また、このとき、隣り合う一方のプレキャストコンクリート床版2と他方のプレキャストコンクリート床版2の接合端面同士が面接触し、雄継手10のピン部13が雌継手11のくさび材20の内部に押し込まれることによりくさび材20が拡径し、くさび材20が拡径した後、皿バネ21によって縮径する方向に押し戻され、介装材19ひいてはケース17に圧着される。   At this time, the joining end surfaces of one adjacent precast concrete floor slab 2 and the other precast concrete floor slab 2 are in surface contact with each other, and the pin portion 13 of the male joint 10 is pushed into the wedge member 20 of the female joint 11. As a result, the diameter of the wedge material 20 is increased, and after the wedge material 20 has been expanded in diameter, the wedge material 20 is pushed back in the direction of reducing the diameter by the disc spring 21, and is crimped to the interposition material 19 and thus the case 17.

なお、本実施形態のプレキャストコンクリート床版の接合部構造Bにおいては、例えば、軸部12、18がM30の雄継手10、雌継手11を用いた場合に、10〜15kNの挿入力(くさび材20の内部への押込力)で約600kNの締結力を得ることができる。すなわち、小さな挿入力で非常に大きな締結力(接合力)を得ることができる。   In the joint structure B of the precast concrete slab of the present embodiment, for example, when the shaft parts 12 and 18 use the male joint 10 and the female joint 11 of M30, the insertion force (wedge material) of 10 to 15 kN 20), a fastening force of about 600 kN can be obtained. That is, a very large fastening force (joining force) can be obtained with a small insertion force.

さらに、接合端面同士を面接触させた後に箱抜き部16から雄継手10の定着部としてのナット14を螺入操作する。このようにナット14を螺入して締め付けると、雄側軸部12が筒状体15で被覆された状態でコンクリートに埋設されているため、雄継手10(及び雌継手11)に軸力が付加され、この軸力によって一方のプレキャストコンクリート床版2と他方のプレキャストコンクリート床版2の互いの接合端面が大きな力で密着し、強固に接合される。   Further, after the joining end surfaces are brought into surface contact with each other, a nut 14 as a fixing portion of the male joint 10 is screwed in from the box removing portion 16. When the nut 14 is screwed and tightened in this manner, the male side shaft portion 12 is buried in the concrete covered with the cylindrical body 15, so that the axial force is applied to the male joint 10 (and the female joint 11). In addition, due to this axial force, the joining end surfaces of the one precast concrete floor slab 2 and the other precast concrete floor slab 2 are brought into close contact with each other with a large force and are firmly joined.

これにより、本実施形態のプレキャストコンクリート床版の接合部構造B及び橋梁の床版Aにおいては、順次プレキャストコンクリート床版2を設置するとともにスライド移動させ、隣り合うプレキャストコンクリート床版2に設けられた雄継手10と雌継手11を(ワンタッチで)嵌合接続することにより、互いの接合端面が面接触した好適な状態で容易に隣り合うプレキャストコンクリート床版2を接合することが可能になる。   As a result, in the joint structure B of the precast concrete floor slab and the bridge slab A of the present embodiment, the precast concrete floor slab 2 was sequentially installed and slid to be provided on the adjacent precast concrete floor slab 2. By fitting and connecting the male joint 10 and the female joint 11 (with one touch), it is possible to easily join the adjacent precast concrete slabs 2 in a suitable state where the joint end faces are in surface contact.

そして、このように隣り合うプレキャストコンクリート床版2を接合しながら複数のプレキャストコンクリート床版2を鋼製桁1上に敷き並べてゆくことにより、容易に橋梁の床版Aを構築することが可能になる。よって、従来と比較し、大幅に効率的に橋梁の床版Aを構築することが可能になる。   And it is possible to easily construct a bridge floor slab A by arranging a plurality of precast concrete floor slabs 2 on a steel girder 1 while joining adjacent precast concrete floor slabs 2 in this way. Become. Therefore, it is possible to construct the bridge floor slab A significantly more efficiently than in the past.

また、雄側軸部12に筒状体15を取り付け、雄側軸部12と筒状体15の間にプレグラウト樹脂24が充填された状態で雄継手10がプレキャストコンクリート床版2に一体に埋設されていることにより、さらに、このプレグラウト樹脂24が硬化中で流動性を保持した状態(粘弾性体)で、雄側軸部12がプレグラウト樹脂24中を移動可能であることによって、多少の施工誤差、位置決め誤差を吸収することができる。この点からも施工性の向上を図ることが可能になる。さらに、雄側軸部12に筒状体15を取り付け、雄側軸部12と筒状体15の間にプレグラウト樹脂24が充填された状態で雄継手10がプレキャストコンクリート床版2に一体に埋設されていることにより、箱抜き部16から雄継手10のナット14を螺入操作すると、雄継手10(及び雌継手11)に軸力を付加することができ、この軸力を締め付け力として隣り合うプレキャストコンクリート床版2をより強固に接合することが可能になる。   Further, the cylindrical body 15 is attached to the male shaft portion 12, and the male joint 10 is embedded in the precast concrete floor slab 2 in a state where the pregrout resin 24 is filled between the male shaft portion 12 and the cylindrical body 15. Furthermore, since the pre-grout resin 24 is cured and retains fluidity (viscoelastic body), the male shaft portion 12 can move in the pre-grout resin 24, so that some construction is possible. Errors and positioning errors can be absorbed. From this point, it is possible to improve the workability. Further, a cylindrical body 15 is attached to the male shaft portion 12, and the male joint 10 is embedded in the precast concrete slab 2 in a state where the pregrout resin 24 is filled between the male shaft portion 12 and the cylindrical body 15. Thus, when the nut 14 of the male joint 10 is screwed in from the box unloading portion 16, an axial force can be applied to the male joint 10 (and the female joint 11), and this axial force is used as a tightening force. The matching precast concrete slab 2 can be joined more firmly.

よって、本実施形態のプレキャストコンクリート床版の接合部構造B及び橋梁の床版Aによれば、従来より効率的に橋梁の床版を構築することが可能になるとともに、ループ状継手を用いずに強固にプレキャストコンクリート床版2同士を接合できるため、床版厚の設定自由度を高めることも可能になる。   Therefore, according to the joint structure B of the precast concrete floor slab and the bridge floor slab A of the present embodiment, it is possible to construct a bridge floor slab more efficiently than before, and without using a loop joint. Since the precast concrete floor slabs 2 can be joined to each other firmly, it is possible to increase the degree of freedom in setting the floor slab thickness.

また、雄継手10と雌継手11を嵌合接続して複数のプレキャストコンクリート床版2を一体に接合し、橋梁の床版Aを形成するため、橋梁の床版A全体や、一部のプレキャストコンクリート床版2の交換が必要になった場合に、例えば目地部からカッターなどで雄継手10を切断するだけで容易にプレキャストコンクリート床版2を個別に取り外すことができ、新たなプレキャストコンクリート床版2を設置して更新することができる。よって、従来と比較し、メンテナンス性を大幅に向上させることが可能になる。   Further, since the male joint 10 and the female joint 11 are fitted and connected to each other and the plurality of precast concrete floor slabs 2 are integrally joined to form a bridge floor slab A, the entire bridge floor slab A or a part of the precasts. When the concrete floor slab 2 needs to be replaced, for example, the precast concrete floor slab 2 can be easily removed by simply cutting the male joint 10 from the joint with a cutter or the like. 2 can be installed and updated. Therefore, it is possible to greatly improve the maintainability as compared with the conventional case.

以上、本発明に係る本実施形態のプレキャストコンクリートブロックの接合部構造及びこれを備えたプレキャストコンクリートブロックの接合構造体の一実施形態について説明したが、本発明は上記の実施形態に限定されるものではなく、その趣旨を逸脱しない範囲で適宜変更可能である。   As described above, the embodiment of the joint structure of the precast concrete block according to the present embodiment and the joint structure of the precast concrete block including the same have been described, but the present invention is limited to the above embodiment. Instead, it can be changed as appropriate without departing from the spirit of the invention.

例えば、本実施形態では、プレキャストコンクリートブロックの接合構造体が道路橋や鉄道橋などの橋梁の床版、プレキャストコンクリートブロックの接合部構造がプレキャストコンクリート床版の接合部構造であるものとして説明を行ったが、必ずしも、本発明に係るプレキャストコンクリートブロックの接合構造体を橋梁の床版、本発明に係るプレキャストコンクリートブロックの接合部構造をプレキャストコンクリート床版の接合部構造に限定しなくてもよい。
例えば、大型のプレキャストボックスカルバートにおいて断面を分割して施工する場合等に本発明を適用してもよい。言い換えれば、プレキャストコンクリートブロックの継手において、軸力だけでなく、曲げモーメントとせん断力を伝達する継手にはすべて本発明が適用可能である。
For example, in this embodiment, it is assumed that the joint structure of the precast concrete block is a floor slab of a bridge such as a road bridge or a railway bridge, and the joint structure of the precast concrete block is a joint structure of a precast concrete floor slab. However, the joint structure of the precast concrete block according to the present invention is not necessarily limited to the bridge floor slab, and the joint structure of the precast concrete block according to the present invention is not limited to the joint structure of the precast concrete floor slab.
For example, the present invention may be applied to a case where a large precast box culvert is constructed by dividing a cross section. In other words, in the joint of the precast concrete block, the present invention can be applied to all joints that transmit not only the axial force but also the bending moment and the shearing force.

1 鋼製桁(桁)
2 プレキャストコンクリート床版(プレキャストコンクリートブロック)
2a 床版本体(プレキャストコンクリートブロック本体)
2b 貫通孔
3 コンクリート
4 ループ状継手
5 補強鉄筋(配力筋)
10 雄継手
11 雌継手
12 雄側軸部
13 ピン部(嵌合凸部)
14 ナット(定着部)
15 筒状体
16 箱抜き部(操作凹部)
17 ケース(嵌合凹部)
17a 小径部
17b 大径部
17c 段部
18 定着ボルト
18a 雌側軸部
18b 雄ネジ部
18c 定着部
19 介装材
20 くさび材
20a スリット
21 皿バネ(バネ部材)
22 床版接合装置
22a ポンプ
22b 油圧ジャッキ
22c 鋼製ガイド
23 定着部補強鉄筋
24 プレグラウト樹脂
25 支圧板
26 座金
A 橋梁の床版(プレキャストコンクリートブロックの接合構造体)
B プレキャストコンクリート床版の接合部構造(プレキャストコンクリートブロックの接合部構造)
O1 軸線
S 接合部
1 Steel girders (girder)
2 Precast concrete floor slab (precast concrete block)
2a Floor slab body (precast concrete block body)
2b Through hole 3 Concrete 4 Loop joint 5 Reinforcement reinforcing bar
10 Male Joint 11 Female Joint 12 Male Shaft Part 13 Pin Part (Fitting Convex Part)
14 Nut (fixing part)
15 Tubular body 16 Box opening (operation recess)
17 Case (Fitting recess)
17a Small-diameter portion 17b Large-diameter portion 17c Step portion 18 Fixing bolt 18a Female shaft portion 18b Male screw portion 18c Fixing portion 19 Interposing material 20 Wedge material 20a Slit 21 Disc spring (spring member)
22 Floor slab joining device 22a Pump 22b Hydraulic jack 22c Steel guide 23 Reinforcement reinforcing bar 24 Pre-grout resin 25 Bearing plate 26 Washer A Bridge slab (precast concrete block joint structure)
B Precast concrete floor slab joint structure (precast concrete block joint structure)
O1 Axis S Joint

Claims (5)

隣り合う一方のプレキャストコンクリートブロックの接合端面から嵌合凸部を突出させた状態で一方のプレキャストコンクリートブロックに一体に埋設される雄継手と、
隣り合う他方のプレキャストコンクリートブロックの接合端面に嵌合凹部の開口部を開口させた状態で他方のプレキャストコンクリートブロックに一体に埋設される雌継手とを備え、
且つ、前記雄継手が、棒状の雄側軸部と、前記雄側軸部の先端から軸線方向外側に突出する棒状の前記嵌合凸部と、前記雄側軸部の後端側に螺着されるナットと、前記雄側軸部の外周を被覆するように取り付けられる筒状体とを備え、
前記雌継手が、後部側に小径部、前部側に大径部を設けて形成された筒状の前記嵌合凹部と、棒状の雌側軸部、前記雌側軸部の先端側に設けられ、前記嵌合凹部の小径部の内面に施された雌ネジに螺合させる雄ネジ部、前記雌側軸部の後端側に設けられた定着部からなる定着ボルトと、前記嵌合凹部の大径部の内部に挿入配置される筒状の介装材と、軸線方向先端側から後端側に向かうに従い漸次その外径が大となるように形成され、先端側を前記介装材の後端側の内孔に嵌合させつつ前記嵌合凹部の大径部の内部に挿入配置されくさび材と、前記嵌合凹部の内部に配設されるとともに、前記嵌合凹部の大径部、小径部を繋ぐ段部と前記くさび材の後端との間に配設される環状のバネ部材とを備え、
隣り合うプレキャストコンクリートブロックの互いの前記雄継手の嵌合凸部と前記雌継手の嵌合凹部とが嵌合接続され、隣り合うプレキャストコンクリートブロック同士が接合されるように構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ブロックの接合部構造。
A male joint embedded integrally in one precast concrete block in a state where the fitting convex portion protrudes from the joint end face of one adjacent precast concrete block,
A female joint embedded integrally in the other precast concrete block in a state where the opening of the fitting recess is opened on the joint end surface of the other adjacent precast concrete block;
The male joint is screwed to the rod-shaped male shaft portion, the rod-shaped fitting convex portion protruding outward in the axial direction from the tip of the male shaft portion, and the rear end side of the male shaft portion. And a cylindrical body attached so as to cover the outer periphery of the male shaft portion,
The female joint is provided at the rear side of the cylindrical fitting recess formed by providing a small-diameter portion and a large-diameter portion on the front side, a rod-shaped female shaft portion, and a distal end side of the female shaft portion. And a fixing bolt comprising a male screw part screwed into a female screw provided on the inner surface of the small diameter part of the fitting concave part, a fixing bolt provided on the rear end side of the female side shaft part, and the fitting concave part A cylindrical interposition material inserted and disposed inside the large-diameter portion, and the outer diameter gradually increases from the front end side to the rear end side in the axial direction. A wedge material that is inserted and arranged inside the large-diameter portion of the fitting recess while being fitted into the inner hole on the rear end side, and a large diameter of the fitting recess that is disposed inside the fitting recess. An annular spring member disposed between the step portion connecting the small diameter portion and the rear end of the wedge material,
The fitting projections of the male joints of the adjacent precast concrete blocks and the fitting recesses of the female joints are fitted and connected, and the adjacent precast concrete blocks are joined to each other. Precast concrete block joint structure.
請求項1記載のプレキャストコンクリートブロックの接合部構造において、
前記雄側軸部と前記筒状体の隙間にプレグラウト樹脂が注入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ブロックの接合部構造。
In the joint structure of the precast concrete block according to claim 1,
A precast concrete block joint structure, wherein a pre-grout resin is injected into a gap between the male shaft and the cylindrical body.
請求項1または請求項2に記載のプレキャストコンクリートブロックの接合部構造を備え、
隣り合うプレキャストコンクリートブロック同士が前記プレキャストコンクリートブロックの接合部構造で接合されてなることを特徴とするプレキャストコンクリートブロックの接合構造体。
The joint structure of the precast concrete block according to claim 1 or 2,
Adjacent precast concrete blocks are joined to each other by the joint structure of the precast concrete blocks.
請求項3記載のプレキャストコンクリートブロックの接合構造体において、
前記雄継手と前記雌継手が、隣り合うプレキャストコンクリートブロックの接合端面同士を密着させる方向の軸力を付加して接続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ブロックの接合構造体。
In the joint structure of the precast concrete block according to claim 3,
The joint structure of a precast concrete block, wherein the male joint and the female joint are connected by applying an axial force in a direction in which joint end faces of adjacent precast concrete blocks are brought into close contact with each other.
請求項3または請求項4に記載のプレキャストコンクリートブロックの接合構造体において、
前記プレキャストコンクリートブロックがプレキャストコンクリート床版であることを特徴とするプレキャストコンクリートブロックの接合構造体。
In the joint structure of the precast concrete block according to claim 3 or 4,
The precast concrete block joining structure, wherein the precast concrete block is a precast concrete floor slab.
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