JP2006193943A - Road bridge beam expansion device - Google Patents

Road bridge beam expansion device Download PDF

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JP2006193943A
JP2006193943A JP2005005135A JP2005005135A JP2006193943A JP 2006193943 A JP2006193943 A JP 2006193943A JP 2005005135 A JP2005005135 A JP 2005005135A JP 2005005135 A JP2005005135 A JP 2005005135A JP 2006193943 A JP2006193943 A JP 2006193943A
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road bridge
girder
expansion
road
sound
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JP4552657B2 (en
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Satoru Shimanoe
哲 島ノ江
Keiichi Hasegawa
恵一 長谷川
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Yokohama Rubber Co Ltd
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Yokohama Rubber Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a road bridge beam expansion device capable of not only preventing rain water from falling to the underside of a girder but also reducing the propagation of impact noise to the underside of the girder produced when a vehicle passes the upper side of the expansion device to reduce the level of a propagation sound (noise) affecting the underside of the girder. <P>SOLUTION: In this road bridge beam expansion device formed by installing an expansion rubber part in a girder loose part at the joint part of a road, a drain gutter formed of a water sealing rubber membrane and a sound absorbing material joined to the lower surface of the water sealing rubber membrane is installed in the girder loose part immediately below the expansion rubber part. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、排水樋を有している道路橋梁伸縮装置に関する。   The present invention relates to a road bridge expansion and contraction device having a drain.

従来、地上に設置される道路橋等では、一定距離間隔で道路(道路橋の橋桁)の伸縮を吸収するための隙間部を形成し、この隙間部の継ぎ目間には、ゴム状弾性体からなる伸縮体を備えた道路橋梁用伸縮装置を設置して、道路の伸縮の吸収、通過車両による衝撃の吸収等を図っている(特許文献1−3)。   Conventionally, in road bridges installed on the ground, gaps for absorbing expansion and contraction of roads (bridge girder of road bridges) are formed at regular intervals, and a rubber-like elastic body is formed between the joints of the gaps. A telescopic device for a road bridge having a telescopic body is installed to absorb the expansion and contraction of the road and the impact of the passing vehicle (Patent Documents 1-3).

一方、過去には山あいなどに作られることの多かった道路橋や高架道路などが、近年では、住宅地やその近隣に作られるケースも多く生じてきている。   On the other hand, road bridges and elevated roads, which were often made in the past in the past, have recently been created in residential areas and their vicinity.

そのようなケースでは、道路橋梁用伸縮装置は車両通過に伴う通過音の発生の源となっており、該通過音が該伸縮装置の振動を介して橋桁下に伝播し、該橋の下の近隣地区への騒音となり、少しでもこの騒音を低減化することが望まれるようになってきた。   In such a case, the expansion device for the road bridge is a source of the generation of passing sound accompanying the passage of the vehicle, and the passing sound propagates under the bridge girder through the vibration of the expansion device, It has become a noise to neighboring areas, and it has become desirable to reduce this noise as much as possible.

また、このような道路橋梁用伸縮装置が設置されている箇所もしくはその近傍においての雨水などの排水に関しても、具体的な問題として注目を浴びてきており、従来の伸縮装置付近では雨水などの排水の桁下への落下が問題となることも多くあった。   Also, drainage of rainwater etc. at or near the location where such a road bridge telescopic device is installed has attracted attention as a specific problem. In many cases, falling below the beam was a problem.

すなわち、住宅地やその近隣に作られるケースが多くなると、該道路橋梁からの雨水の排水などの問題、生活環境への影響なども大きくなる。   That is, as the number of cases created in a residential area or in the vicinity thereof increases, problems such as drainage of rainwater from the road bridge and the impact on the living environment increase.

一方、止水体として、ゴム板材を湾曲させてなる受け部材と、この受け部材の内部に充填されたウレタンフォームと、このウレタンフォーム上に充填されたシール材とから形成させ、そして、前記の受け部材を橋桁の対向する面にボルト止めするようにした例が提案されている(特許文献4)。   On the other hand, the waterstop is formed from a receiving member formed by bending a rubber plate, a urethane foam filled in the receiving member, and a sealing material filled on the urethane foam, and the receiving member There has been proposed an example in which a member is bolted to an opposing surface of a bridge girder (Patent Document 4).

しかし、この特許文献4に提案されている道路橋梁伸縮装置では、排水を積極的に流すという思想は存在していなかったものである。   However, in the road bridge expansion and contraction device proposed in Patent Document 4, there has been no idea of positively flowing drainage.

また、止水機能として、断面が略U字状の伸縮部を有し、かつ少なくとも一層以上の補強層が埋設されたというゴム状弾性シート材料を桁遊間部に設けたという提案がされている(特許文献5)。   In addition, as a water-stopping function, a proposal has been made that a rubber-like elastic sheet material having a stretchable portion having a substantially U-shaped cross section and having at least one or more reinforcing layers embedded in a girder gap is provided. (Patent Document 5).

しかし、この特許文献5に提案されている道路橋梁伸縮装置では、桁下に及ぼす騒音について改善するという思想は存在していなかったものである。
特開2000−273812号公報 特開2000−96505号公報 特開平8−232206号公報 特開平8−253906号公報 特開2003−64612号公報(図1)
However, the road bridge expansion and contraction device proposed in Patent Document 5 does not have the idea of improving the noise exerted on the girder.
JP 2000-273812 A JP 2000-96505 A JP-A-8-232206 JP-A-8-253906 Japanese Unexamined Patent Publication No. 2003-64612 (FIG. 1)

本発明の目的は、上述したような点に鑑み、桁下への雨水の落下を防止するだけでなく、伸縮装置上を車両が通過する際に発生する桁下への衝撃音の伝播が軽減され、桁下に及ぼす伝播音(騒音)のレベルを低減化することができる道路橋梁の伸縮装置を提供せんとするものである。   The object of the present invention is not only to prevent rainwater from falling below the girder, but also to reduce the propagation of impact sound to the girder that occurs when the vehicle passes over the telescopic device. Therefore, the present invention intends to provide a road bridge expansion / contraction device that can reduce the level of propagation sound (noise) exerted on the girder.

上述した目的を達成する本発明の道路橋梁伸縮装置は、以下の(1) の構成からなるものである。
(1)道路の継ぎ目部の桁遊間に伸縮ゴム部が設けられてなる道路橋梁伸縮装置において、該伸縮ゴム部直下の桁遊間に、止水ゴム膜と該止水ゴム膜の下面に接合して設けられた吸音材からなる排水樋を付設したことを特徴とする道路橋梁伸縮装置。
The road bridge expansion and contraction device of the present invention that achieves the above-mentioned object has the following configuration (1).
(1) In a road bridge expansion / contraction device in which a stretchable rubber part is provided between girders at a seam part of a road, a waterproof rubber film and a lower surface of the waterproof rubber film are joined between girders immediately below the stretchable rubber part. A road bridge expansion and contraction device characterized by having a drainage basin made of a sound absorbing material provided.

また、かかる本発明の道路橋梁伸縮装置は、好ましくは、以下の(2) から(4) の具体的構成を有するものである。
(2)吸音材が、気泡を内部に有した発泡材からなることを特徴とする上記(1) 記載の道路橋梁伸縮装置。
(3)気泡が、連続気泡であることを特徴とする上記(1) または(2) 記載の道路橋梁伸縮装置。
(4)吸音材が、発泡ゴムからなることを特徴とする上記(1) 、(2) または(3) 記載の道路橋梁伸縮装置。
The road bridge expansion / contraction device of the present invention preferably has the following specific configurations (2) to (4).
(2) The road bridge expansion and contraction device according to the above (1), wherein the sound absorbing material is made of a foam material having air bubbles inside.
(3) The road bridge expansion and contraction device according to (1) or (2) above, wherein the bubbles are open cells.
(4) The road bridge expansion and contraction device according to (1), (2) or (3) above, wherein the sound absorbing material is made of foam rubber.

本発明によれば、桁下への雨水の落下を防止するだけでなく、伸縮装置上を車両が通過する際に発生する桁下への衝撃音の伝播が軽減され、桁下に及ぼす伝播音(騒音)のレベルを低減化することができ、また、止水ゴム膜が吸音材によってバックアップ保持されていることにより該止水ゴム膜の補強効果を発揮できる道路橋梁伸縮装置を提供することができるものである。   According to the present invention, not only does rain water fall under the girder, but also the propagation of impact sound to the girder generated when the vehicle passes over the telescopic device is reduced, and the propagation sound exerted on the girder is reduced. It is possible to provide a road bridge expansion / contraction device that can reduce the level of (noise) and that can exert the reinforcing effect of the water-stopping rubber film by being backed up by the sound-absorbing material. It can be done.

以下、更に詳しく本発明の道路橋梁伸縮装置について説明する。   Hereinafter, the road bridge expansion and contraction device of the present invention will be described in more detail.

本発明の道路橋梁伸縮装置は、道路の継ぎ目部の道路橋梁桁遊間に伸縮ゴム部が設けられてなる道路橋梁伸縮装置において、該伸縮ゴム部直下の桁遊間に、止水ゴム膜と該止水ゴム膜の下面に接合して設けられた吸音材とからなる排水樋を付設したものである。   The road bridge expansion / contraction device of the present invention is a road bridge expansion / contraction device in which an elastic rubber portion is provided between road bridge girders at a seam portion of a road. A drainage basin composed of a sound-absorbing material joined to the lower surface of the water rubber film is attached.

図1は、本発明の道路橋梁伸縮装置の一実施態様例を示した概略断面モデル図であり、道路橋梁桁1の遊間に伸縮ゴム部3が設けられ、さらに、伸縮ゴム部3の直下の桁遊間2に止水ゴム膜5と該止水ゴム膜5の下面に接合して設けられた吸音材6とからなる排水樋7が設けられているものである。4は橋台であり、8は伸縮装置をアンカーボルトで橋台に固定するためのモルタルを施工する時にモルタルが流れ出さないようにする堰である。   FIG. 1 is a schematic cross-sectional model view showing an embodiment of a road bridge expansion / contraction device according to the present invention, in which an expansion / contraction rubber part 3 is provided in the play of a road bridge girder 1 and is further directly under the expansion / contraction rubber part 3. A drainage trough 7 comprising a water-stopping rubber film 5 and a sound-absorbing material 6 provided on the lower surface of the water-stopping rubber film 5 is provided in the girder gap 2. 4 is an abutment, and 8 is a weir that prevents the mortar from flowing out when constructing a mortar for fixing the telescopic device to the abutment with an anchor bolt.

吸音材6は、吸音効果を有する樹脂の成形体から形成されるのが好ましく、例えば、気泡を内部に有した発泡材、中でも、気泡が連続気泡である発泡材、具体的には気泡が連続気泡である発泡ゴム材から形成されるもの等が好ましいものである。但し、気泡は連続であれ独立気泡であれ、発泡倍率なども重要な要素であり、発泡ゴム材の場合、発泡倍率が、好ましくは1.5〜15倍、より好ましくは、2〜10倍程度のものであることが高い吸音効果が得られる等の点から好ましい。   The sound-absorbing material 6 is preferably formed from a molded product of a resin having a sound-absorbing effect. For example, a foamed material having bubbles therein, among them, a foamed material in which the bubbles are open cells, specifically, the bubbles are continuous. What is formed from the foamed rubber material which is a bubble is preferable. However, whether the bubbles are continuous or closed, the expansion ratio is also an important factor. In the case of a foamed rubber material, the expansion ratio is preferably 1.5 to 15 times, more preferably about 2 to 10 times. It is preferable from the point that a high sound absorption effect is obtained.

該吸音材6は、伸縮ゴム部3の直下の桁遊間2の実質的に全幅に対して設けられているのが、吸音による騒音防止効果や排水樋を形成する止水ゴム膜5の形態支持効果が高くなることから最も好ましい。止水ゴム膜5の形態は、図1には一つの凹部形態が形成されているものを示しているが、2つまたは3つと複数の凹部形態が形成されているものであってもよい。   The sound-absorbing material 6 is provided for substantially the entire width of the beam gap 2 immediately below the stretchable rubber portion 3 to support the form of the water-stopping rubber film 5 that forms a noise prevention effect due to sound absorption and a drainage basin. Most preferable because the effect is high. The form of the water-stopping rubber film 5 is shown in FIG. 1 in which a single concave form is formed, but two or three and a plurality of concave forms may be formed.

特に、伸縮ゴム部3の直下の桁遊間2において空間部が存在すると、その空間部で共鳴して騒音が伝播されてくることがあるので、そのような共鳴空間が存在することのないように、桁遊間2の実質的に全幅に対して設けられていることと、ある程度の高さ(深さ)を有して形成されているのが好ましいのである。   In particular, if there is a space in the gap 2 immediately below the elastic rubber portion 3, noise may be propagated by resonance in the space, so that such a resonance space does not exist. It is preferable that the beam gap 2 is provided with respect to substantially the entire width and has a certain height (depth).

止水ゴム膜5は、橋桁の振動、地震等に応じて伸縮をして緩衝効果を有するものでもよく、むしろ、その方が全体の伸縮装置としての性能特性を向上させ得るので好ましいものである。   The waterproof rubber film 5 may be one that expands and contracts in response to bridge girder vibrations, earthquakes, etc., and has a buffering effect. Rather, it is preferable because it can improve the performance characteristics of the entire expansion device. .

止水ゴム膜5は、図1に示したように、ゴム板材を湾曲させてその端部を、伸縮装置最外側ビーム(側板)9にボルト等を介して取り付けることができる。   As shown in FIG. 1, the water-stopping rubber film 5 can be attached to the outermost beam (side plate) 9 of the telescopic device via a bolt or the like by curving the rubber plate material.

吸音材6は、止水ゴム膜5の形態が振動などに対応して変化するものであれば、その変化に追従して伸縮・形態変化ができるものであるのが好ましく、吸音材の構成材料は、ゴム材料(クロロプレンゴム、エチレンプロピレンゴム、ウレタンゴムなど)からなるスポンジゴムを好適に使用でき、さらに、軟質ポリウレタン、軟質ポリエチレン等の弾性発泡体も好適に使用できる。   If the form of the water-stopping rubber film 5 changes in response to vibration or the like, it is preferable that the sound-absorbing material 6 can expand and contract and change its form following the change. Sponge rubber made of a rubber material (chloroprene rubber, ethylene propylene rubber, urethane rubber, etc.) can be preferably used, and elastic foams such as soft polyurethane and soft polyethylene can also be suitably used.

止水ゴム膜5と該止水ゴム膜5の下面に吸音材6を接合する手段は、特に限定されるものではないが、例えば、凹部形態を有する吸音材を成形して得た後に、凹部形態に成形されている止水ゴム膜5に接着剤などにより全面もしくは一部箇所を接合することにより行うことができる。   The means for joining the water-absorbing rubber film 5 and the sound-absorbing material 6 to the lower surface of the water-stopping rubber film 5 is not particularly limited. For example, after forming the sound-absorbing material having a concave shape, the concave portion It can be performed by bonding the entire surface or a part of the water-stopping rubber film 5 formed into a shape with an adhesive or the like.

吸音材6の使用量は吸音効果の大小に関わることから、好ましくは、排水樋長さ1m当たりの容積で0.01〜0.2m3 、重量では0.5〜100kgであり、この範囲よりも小さいと、吸音効果や排水樋としての止水ゴム膜5に対する支持効果が小さくなるので好ましくなく、また、該範囲よりも大きくなると、製造することが難しくなる一方で得られる効果が比例して大きくなるわけではないので、好ましくない。 Since the amount of the sound-absorbing material 6 is related to the level of the sound-absorbing effect, it is preferably 0.01 to 0.2 m 3 in volume per 1 m of drainage basin and 0.5 to 100 kg in weight. Is not preferable because the sound absorption effect and the support effect on the water blocking rubber film 5 as a drainage basin are small, and if it is larger than this range, it is difficult to manufacture and the effect obtained is proportional. Since it does not become large, it is not preferable.

図1は、本発明の道路橋梁伸縮装置の一実施態様例を示した概略断面モデル図である。FIG. 1 is a schematic cross-sectional model diagram showing an embodiment of the road bridge extension / contraction device of the present invention.

符号の説明Explanation of symbols

1:道路橋梁桁
2:桁遊間
3:伸縮ゴム部
4:橋台
5:止水ゴム膜
6:吸音材
7:排水樋
8:堰
9:伸縮装置最外側ビーム(側板)
1: Road bridge girder 2: Girder gap 3: Elastic rubber part 4: Abutment 5: Water stop rubber film 6: Sound absorbing material 7: Drainage 8: Weir 9: Outermost beam of expansion device (side plate)

Claims (4)

道路の継ぎ目部の道路橋梁桁遊間に伸縮ゴム部が設けられてなる道路橋梁伸縮装置において、該伸縮ゴム部直下の桁遊間に、止水ゴム膜と該止水ゴム膜の下面に接合して設けられた吸音材からなる排水樋を付設したことを特徴とする道路橋梁伸縮装置。   In a road bridge expansion / contraction device in which an elastic rubber part is provided between road bridge girders at a seam part of a road, between a girder just below the elastic rubber part, bonded to a water-stop rubber film and the lower surface of the water-stop rubber film A road bridge expansion and contraction device, characterized in that a drainage basin made of a sound absorbing material is provided. 吸音材が、気泡を内部に有した発泡材からなることを特徴とする請求項1記載の道路橋梁伸縮装置。   The road bridge expansion and contraction device according to claim 1, wherein the sound absorbing material is made of a foam material having bubbles inside. 気泡が、連続気泡であることを特徴とする請求項1または2記載の道路橋梁伸縮装置。   The road bridge expansion and contraction device according to claim 1, wherein the bubbles are open bubbles. 吸音材が、発泡ゴムからなることを特徴とする請求項1、2または3記載の道路橋梁伸縮装置。   4. A road bridge expansion / contraction device according to claim 1, wherein the sound absorbing material is made of foamed rubber.
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DE202008004174U1 (en) 2008-03-20 2009-08-06 Calenberg Ingenieure, planmäßig elastisch lagern, GmbH Device for forming a sound insulation at an expansion joint
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CN105839522B (en) * 2016-03-31 2019-01-08 浙江工业大学 A kind of sealant of bridge extension joint saves construction method from damage
CN109958057A (en) * 2019-03-08 2019-07-02 漳州龙文区汇洋远软件开发有限公司 A kind of widely applicable longitudinal anti-drop device of novel bridge construction
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