JP2001234504A

JP2001234504A - Bridge expansion joint

Info

Publication number: JP2001234504A
Application number: JP2000045422A
Authority: JP
Inventors: Katsuji Yamaga; 勝治山賀
Original assignee: Sho Bond Corp
Current assignee: Sho Bond Corp
Priority date: 2000-02-23
Filing date: 2000-02-23
Publication date: 2001-08-31
Anticipated expiration: 2020-02-23
Also published as: KR20010085183A; JP3371102B2; CN1310267A

Abstract

PROBLEM TO BE SOLVED: To solve trouble that a back split occurs due to a load car and a change with time and a conventional seamless expansion joint cannot follow an expanded and contracted quantity of a floor slab sufficiently. SOLUTION: A composite material layer in which aggregate is bonded with notched sections at bridge floor slab end sections opposed, holding an opening of rail joints by a site mixing cold cure type binder is laid on the same surface as a paved surface while rubber meshes are buried into the composite material layer, crossing the opening of the rail joints.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は、河川、渓谷、高架
道路等における道路橋梁構造物の伸縮継手、特に継目な
し伸縮継手と呼ばれる橋梁伸縮継手に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to expansion joints for road bridge structures in rivers, valleys, elevated roads, etc., and more particularly to bridge expansion joints called seamless expansion joints.

【０００２】[0002]

【従来の技術】従来の伸縮継手は、床版端部に固定せし
めて遊間上にくし型鋼材を対向させるフィンガージョイ
ント、対向する床版端部をゴムシール材でつないで遊間
を覆うゴムジョイントが主流を占めていたが、これらの
伸縮継手は、床版舗装面が不連続なため車輛の走行面に
影響を及ぼしたり、騒音の発生源となっている。2. Description of the Related Art Conventional expansion joints mainly include a finger joint which is fixed to an end of a floor slab and faces a comb-shaped steel material on a play, and a rubber joint which covers the play by connecting opposite ends of the floor slab with a rubber seal material. However, these expansion joints affect the running surface of a vehicle due to the discontinuity of the floor slab paving surface and are a source of noise.

【０００３】そこで、近時、これらの欠点を解消するた
め、継目なし伸縮継手と呼ばれる伸縮継手が提案され実
用化されている。この伸縮継手の大きな特徴は、対向す
る床版端部の切り欠き部にバインターと天然骨材とから
なる複合材を舗装面と面一に敷設するというものであ
る。[0003] In order to solve these drawbacks, an expansion joint called a seamless expansion joint has recently been proposed and put into practical use. A major feature of this expansion joint is that a composite material composed of a binder and a natural aggregate is laid in a notch at the end of the opposing floor slab flush with the pavement surface.

【０００４】この継目なし伸縮継手は、その呼び名のと
おり、切り欠き部に充填された複合材が舗装面と面一と
なって連続舗装のようになるから、車輛の走行性に良い
影響を与え、また、遊間上に間隙がないから騒音の発生
も少ない。[0004] As the name implies, the seamless expansion joint has a good effect on the running performance of the vehicle, since the composite material filled in the notch portion is flush with the pavement surface and becomes a continuous pavement. Also, since there is no gap in the play space, noise is less generated.

【０００５】[0005]

【発明が解決しようとする課題】通常、この継目なし伸
縮継手は、骨材にゴムアスファルトをバインダーを用い
て結合した複合材が用いられ、車輛荷重に対する耐圧縮
性は、塑性体をベースにして骨材で持ち、床版に対する
伸縮性はバインダーで持つ構造となっている。Normally, this seamless expansion joint uses a composite material in which rubber asphalt is combined with an aggregate using a binder, and the compression resistance to vehicle load is based on a plastic body. It has an aggregate, and has a structure that has elasticity to the floor slab with a binder.

【０００６】しかしながら、ゴムアスファルト自体は、
塑性的性質で弾性的性質がないため、荷重車輛には抵抗
できず、徐々に変形が進み、また、経年変化による背割
れなどが発生し、路面の平坦性が損なわれ、そのうえ、
ゴムアスファルトの伸縮量だけでは床版の伸縮量が十分
にとれない。However, rubber asphalt itself is
Due to its plastic nature and lack of elasticity, it cannot withstand the load vehicle, gradually deforms, and cracks due to aging occur, and the flatness of the road surface is impaired.
The amount of expansion and contraction of the floor slab cannot be sufficiently obtained only by the amount of expansion and contraction of the rubber asphalt.

【０００７】本発明は、このような問題点を解消し、床
版の伸縮挙動に十分に追随できる橋梁伸縮継手を提供し
ようとするものである。An object of the present invention is to solve such a problem and to provide a bridge expansion joint capable of sufficiently following the expansion and contraction behavior of a floor slab.

【０００８】[0008]

【課題を解決するための手段】まず基本的には、遊間を
はさんで対向する橋梁床版端部の切り欠き部に複合材層
を舗装層と面一に敷設する橋梁伸縮継手において、複合
材層中にゴムメッシュを遊間を跨いで埋設した橋梁伸縮
継手を提供する。SUMMARY OF THE INVENTION Basically, in a bridge expansion joint in which a composite material layer is laid flush with a pavement layer in a notch at the end of a bridge floor slab facing a play space. A bridge expansion joint in which a rubber mesh is embedded in a material layer across a play.

【０００９】そして、さらに、遊間をはさんで対向する
橋梁床版端部の切り欠き部に、骨材を現場混合常温硬化
タイプのバインダーで結合した複合材層を舗装面と面一
に敷設するとともに複合材層中にゴムメッシュを遊間を
跨いで埋設した橋梁伸縮継手を提供する。[0009] Further, a composite material layer in which an aggregate is combined with an in-situ mixed room temperature hardening type binder is laid in the notch at the end of the bridge floor slab facing the play space flush with the pavement surface. Also provided is a bridge expansion joint in which a rubber mesh is embedded in a composite material layer across a play.

【００１０】骨材は、好ましくはゴムチップと硅砂を主
成分とする。The aggregate preferably contains rubber chips and silica sand as main components.

【００１１】[0011]

【発明の実施の形態】以下、本発明に係る橋梁伸縮継手
の一実施の形態を図面に基づき説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a bridge expansion joint according to the present invention will be described below with reference to the drawings.

【００１２】図１は、対向する床版端部の舗装層を切り
欠いた状態を示す断面図、図２は、伸縮継手が施工され
た状態を示す断面図、図３は、図２のＡ−Ａ線断面図、
図４は、部分拡大図である。FIG. 1 is a cross-sectional view showing a state in which a pavement layer at an end of a facing slab is cut off, FIG. 2 is a cross-sectional view showing a state in which an expansion joint is constructed, and FIG. -A line sectional view,
FIG. 4 is a partially enlarged view.

【００１３】図１において、遊間８をはさんで対向する
床版１、１の端部は舗装層３、３が切り欠かれて切り欠
き部２、２が形成され、遊間８には必要により止水材９
が充填される。In FIG. 1, the ends of the floor slabs 1 and 1 opposed to each other with the gap 8 therebetween are cut out of the pavement layers 3 and 3 to form cutouts 2 and 2. Waterproof material 9
Is filled.

【００１４】ついで、図２、図３において、切り欠き部
２、２の切り欠き面に必要に応じて図４に示すようにプ
ライマー１０が塗布され、遊間を覆うようにしてゴムシ
ート１１ａ、ギャッププレート１１ｂ等により形成され
た蓋部材１１が対向する床版１、１の端部に架け渡され
る。複合材層４を敷設するにあたり、遊間８に複合材層
４が落ち込まなければ蓋部材１１はなくてもよい。2 and 3, a primer 10 is applied to the cutout surfaces of the cutouts 2 and 2 as necessary, as shown in FIG. 4, and a rubber sheet 11a is A cover member 11 formed by a plate 11b or the like is laid over the ends of the floor slabs 1 and 1 facing each other. When laying the composite material layer 4, the cover member 11 may be omitted if the composite material layer 4 does not fall into the play space 8.

【００１５】ついで、図４に拡大して示したゴムチップ
５、硅砂６、バインダー７からなる複合材層４を蓋部材
１１と切り欠き部２、２に打設充填し、一定量充填後に
ゴムメッシュ１２を遊間８を跨ぐようにして架け渡し、
架け渡し後、さらに舗装層３、３と面一になるまで充填
する。Next, a composite material layer 4 composed of a rubber chip 5, silica sand 6, and a binder 7 shown in an enlarged manner in FIG. 12 is bridged over the playroom 8
After bridging, it is further filled until it is flush with the pavement layers 3 and 3.

【００１６】なお、この実施の形態で、バインダーは現
場混合常温硬化タイプのウレタン樹脂を使用した。現場
混合常温硬化タイプのバインダーとしてはエポキシ樹
脂、エポキシ樹脂＋無機質又はゴム系樹脂等がある。ま
た、ゴムチップ、硅砂、バインダーの配合比は、伸縮継
手の伸び縮みを考慮して適宜定めればよい。ゴムメッシ
ュの厚さは、全厚の１／５乃至１／３程度とし、メッシ
ュの大きさもこの程度とし、メッシュの形状は丸形、菱
形、四角等いずれでもよい。In this embodiment, a urethane resin of a room-temperature-curing type mixed in situ is used as a binder. Examples of the in-situ mixed room temperature curing type binder include an epoxy resin, an epoxy resin and an inorganic or rubber-based resin. The mixing ratio of the rubber chip, silica sand and binder may be appropriately determined in consideration of the expansion and contraction of the expansion joint. The thickness of the rubber mesh is about 1/5 to 1/3 of the total thickness, the size of the mesh is also about this, and the shape of the mesh may be any of a round shape, a rhombus shape, and a square shape.

【００１７】このようにして全体として継目なしジョイ
ントと呼ばれる伸縮継手が形成される。In this manner, an expansion joint generally called a seamless joint is formed.

【００１８】[0018]

【発明の効果】本発明は上述のようにしてなるので、つ
ぎの効果を有する。As described above, the present invention has the following effects.

【００１９】請求項１乃至請求項３において、複合材層
に遊間を跨いでゴムメッシユを埋設したことにより複合
材層の圧縮、引張をスムーズにするので、床版の伸縮に
対して十分に追随することができ、かつ、複合材層の補
強になる。In the first to third aspects of the present invention, the rubber mesh is buried across the play in the composite material layer, so that the compression and tension of the composite material layer are made smooth, so that the composite material layer sufficiently follows the expansion and contraction of the floor slab. And strengthen the composite material layer.

【００２０】請求項２及び請求項３において、バインダ
ーとして現場混合常温硬化タイプのバインダーを使用し
たので、常温で伸縮継手の施工が可能となり、工事の省
力化が計れる。In the second and third aspects, since an in-situ mixed room temperature hardening type binder is used as the binder, the expansion joint can be installed at room temperature, and the work can be saved.

【００２１】請求項３において、骨材をゴムチップと硅
砂からなるものとしたので、ゴムチップのみでは軟らか
いために発生することのある車輛走行時のショツクや騒
音の発生を抑制することができる。また、ゴムチップと
硅砂の配合比を変化させることにより伸縮継手の必要な
伸縮量を確保することができる。According to the third aspect of the present invention, since the aggregate is made of rubber chips and silica sand, it is possible to suppress the generation of shock and noise when the vehicle is running, which may occur because the rubber chips alone are soft. Further, by changing the mixing ratio of the rubber chip and the silica sand, the necessary expansion and contraction amount of the expansion joint can be secured.

【図面の簡単な説明】[Brief description of the drawings]

【図１】対向する床版端部の舗装層を切り欠いた状態を
示す断面図である。FIG. 1 is a cross-sectional view showing a state in which a pavement layer at an end of a facing slab is cut away.

【図２】伸縮継手が施工された状態を示す断面図であ
る。FIG. 2 is a cross-sectional view showing a state where an expansion joint is installed.

【図３】図２のＡ−Ａ線断面図である。FIG. 3 is a sectional view taken along line AA of FIG. 2;

【図４】図２の部分拡大図である。FIG. 4 is a partially enlarged view of FIG. 2;

【符号の説明】[Explanation of symbols]

１床版２切り欠き部３舗装層４複合材層５ゴムチップ６硅砂７バインダー８遊間９止水材１０プライマー１１蓋部材１１ａゴムシート１１ｂギャッププレート１２ゴムメッシュ１３コンクリートアンカー１４鉄筋 DESCRIPTION OF SYMBOLS 1 Floor slab 2 Notch 3 Pavement layer 4 Composite material layer 5 Rubber chip 6 Silica sand 7 Binder 8 Play space 9 Water blocking material 10 Primer 11 Cover member 11a Rubber sheet 11b Gap plate 12 Rubber mesh 13 Concrete anchor 14 Steel bar

Claims

【特許請求の範囲】[Claims]

【請求項１】遊間をはさんで対向する橋梁床版端部の
切り欠き部に複合材層を舗装層と面一に敷設する橋梁伸
縮継手において、複合材層中にゴムメッシュを遊間を跨
いで埋設したことを特徴とする橋梁伸縮継手。1. A bridge expansion joint in which a composite material layer is laid flush with a pavement layer at a notch at an end of a bridge floor slab facing a play space, and a rubber mesh is straddled in the composite material layer over the play space. Bridge expansion joint characterized by being buried in.

【請求項２】遊間をはさんで対向する橋梁床版端部の
切り欠き部に、骨材を現場混合常温硬化タイプのバイン
ダーで結合した複合材層を舗装面と面一に敷設するとと
もに複合材層中にゴムメッシュを遊間を跨いで埋設した
ことを特徴とする橋梁伸縮継手。2. A composite material layer in which an aggregate is combined with an in-situ mixed room temperature hardening type binder is laid in a notch at an end of a bridge floor slab opposed to a play space and is flush with a pavement surface. A bridge expansion joint characterized in that a rubber mesh is buried across a play space in a material layer.

【請求項３】骨材は、ゴムチップと硅砂を主成分とす
ることを特徴とする請求項１又は請求項２に記載の橋梁
伸縮継手。3. The bridge expansion joint according to claim 1, wherein the aggregate is mainly composed of rubber chips and silica sand.