JP2004257038A

JP2004257038A - Structure of bridge expansion joint

Info

Publication number: JP2004257038A
Application number: JP2003046747A
Authority: JP
Inventors: Akira Ueda; 昭上田; Michio Tezuka; 道夫手塚; Masahiro Takahashi; 正弘高橋
Original assignee: Sho Bond Corp
Current assignee: Sho Bond Corp
Priority date: 2003-02-25
Filing date: 2003-02-25
Publication date: 2004-09-16
Anticipated expiration: 2023-02-25
Also published as: JP3708081B2

Abstract

<P>PROBLEM TO BE SOLVED: To provide a structure of a bridge expansion joint for dispersing a transport load applied to an expansion joint according to travel of a vehicle in the lateral direction of an expansion joint member, easily and quickly allow installation, and improving durability in the bridge expansion joint installed on a road. <P>SOLUTION: The expansion joint member 25 is, for example, the expansion joint member composed of high purity chloroprene rubber, and the surface serially forms a substantially S-shaped rib 26 as a whole. The substantially S-shaped rib 26 is constituted by combining and joining one and other arch ribs 26a and 26b, and the one arch rib 26a and the other arch rib 26b are arranged in an inversely turning arch. Thus, the whole displacement quantity is reduced, and the transport load is dispersed. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、河川、渓谷、高架道路や各種の道路等に於ける道路橋梁構造物を構成するものであって、その裏込め部材若しくは床版間に介装される橋梁伸縮継手の構造に関する。
【０００２】
【従来の技術】
従来、この種の橋梁伸縮継手の構造の第１の例としては、図４に示す構成であった。図４に於いて、（ａ）は、（ｂ）の矢視Ａ−Ａ線方向の断面図であり、（ｂ）は（ａ）の平面図である。
これについて説明すれば、１は当該橋梁伸縮継手の主要部を構成する伸縮ゴムである。該伸縮ゴム１は、図４（ｂ）に示すようにその表面の前後であって、道路幅員方向に２本の断面略Ｖ字状溝を形成している。そして、該伸縮ゴム１は一方、他方の床版２、３の間の上部に積層した例えば、裏込めコンクリートでなる一方、他方の裏込め部材４、５の間に介装されている。一方、他方の床版２、３の間は床版遊間６であり、この上方に位置する前記伸縮ゴム１内に荷重支持板７を道路幅員方向に延在させて埋設している。また、前記一方、他方の裏込め部材４、５の上面と前記伸縮ゴム１の底面との間にはベースプレート８、９を該伸縮ゴム１内に埋設し、ベースプレート８、９に穿設した図４（ｂ）に示すように道路幅員方向に所定間隔にて複数個のボルト挿入孔８ａ、９ａにそれぞれ六角ボルト１０、１１を挿入してそれぞれナット１２、１３を締付けることにより、前記伸縮ゴム１を一方、他方の裏込め部材４、５に固定すると共に上記各六角ボルト１０、１１を一方、他方のアンカーボルト１４、１５にそれぞれ連結している。
図中、１６、１７は前記一方及び他方の床版２、３上に積層した一方及び他方の舗装部材である。１８、１９は上記一方、他方の裏込め部材４、５に配設された補強鉄筋である。２０、２１上記一方、他方の裏込め部材４、５及び一方、他方の床版２、３に配設されたアンカー鉄筋である。
【０００３】
次に、従来の技術に於ける第２の例としては、図５に示すような橋梁伸縮継手の構造であった。図５は、橋梁伸縮継手の斜視図を示している。
これについて説明すれば、２２は弾性ゴム材料で形成されかつ上、下層に画成されると共に該上、下層にそれぞれ一連の矩形状空洞部を形成してなる伸縮ゴムである。該伸縮ゴム２２は一方、他方の床版２、３上に配置した例えば、鋼材で構成されたサポートブロック２３、２４間に介装される。該サポートブロック２３、２４は、ジョイント遊間６を挟んで前記床版２、３上に立設させた立設部２３ａ、２４ａを備え、及び該立設部２３ａ、２４ａのそれぞれの対向面側にフィンガー状の支持板２３ｂ、２４ｂを突出形成している。そして、前記伸縮ゴム２２はサポートブロック２３、２４の立設部２３ａと２４ａとの間に挿入した後、上記支持板２３ｂ、２４ｂにより支持される。また、伸縮ゴム２２の立設部２３ａ、２４ａ側の側面部には、鋼板２２ａを道路幅員方向に延在させて埋設しており、上記両立設部２３ａ、２４ａに備えた複数個の皿ボルト２３ｃ、２４ｃを該鋼板２２ａにねじ締めすることにより当該伸縮ゴム２２をサポートブロック２３、２４に固定するものである。
尚、図５に於いて、他の構成部品は前記図４と略同一であり、同一番号を付し、その説明を省略する。
【０００４】
また、従来の技術に於ける更に他の例としては、特開２００１−２３４５０４の公開特許公報に開示された橋梁伸縮継手がある。当該技術は、床版上に複合材層を載置し、この複合材層内に遊間を跨いでゴムメッシュを埋設した構造であった。
【０００５】
【発明が解決しようとする課題】
従来の技術は叙上した構成であるので次のような課題が存在した。
すなわち、
前記第１の例に於いては、伸縮ゴム１は六角ボルト１０、１１等ボルトによって、上方から下方に向ってベースプレート８、９に挿通した後、ナット１２、１３により当該ベースプレート８、９の上面にその底面全体を締付け固定する構成であり、車両が当該道路を通過する毎に伸縮ゴム１の表面に繰返えし輪荷重が掛り当該六角ボルト１０、１１やナット１２、１３が弛緩して、伸縮ゴム１が前後方向に圧縮かつ伸縮動作させて前記裏込め部材４、５から浮き上がると共に裏込め部材４、５に車両走行による衝撃を与える。これが原因で当該伸縮ゴム１の亀裂現象や劣化現象を誘起すると共に車両走行に伴う騒音が発生するうえに上記一方、他方の床版２、３を損傷するという問題点があった。
また、前記第１の例に於いては、車両が当該道路を通過する毎に伸縮ゴム１の表面に形成した２本の断面略Ｖ字状溝１ａ、１ｂに輪荷重が掛ることにより、該Ｖ字状溝１ａ、１ｂが変形しジョイントラバー１が該Ｖ字状溝１ａ、１ｂ部分から破裂することがあり、その破裂部分や亀裂部分から雨水や塵埃等が浸入し、漏水現象が誘起されるという問題点があった。
【０００６】
前記第２の例に於いては、伸縮ゴム２２はその底面全体がフィンガー状の支持板２３ｂ、２４ｂにより接触して支持されると共に、サポートブロック２３、２４の立設部２３ａ、２４ａから皿ボルト２３ｃ、２４ｃを螺入することで、該サポートブロック２３、２４に固着される。
而して、従来技術に於ける上記第１の例と同様に、車両が当該道路を通過する毎に伸縮ゴム２２の表面に繰返えし輪荷重が掛り、上記皿ボルト２３ｃ、２４ｃの固定部分が緩み又は皿ボルト２３ｃ、２４ｃが損傷し、該伸縮ゴム２２がサポートブロック２３、２４から飛出すこと及び伸縮ゴム２２のサポートブロック２３、２４への組立工数が大幅に増大するうえに上記第１の例と同様に伸縮ゴム２２の底面全体が上記支持板２３ｂ、２４ｂに接触するので車両走行に伴う騒音が拡大するという問題点があった。
【０００７】
また、前記特開２００１−２３４５０４の公開特許公報に開示された技術は、いわゆる継目なし伸縮継手といわれる伸縮継手装置を示すものであり、舗装層間にゴムチップ、硅砂、バインダー等からなる複合材層を介装してなり、この複合材層内にゴムメッシュを埋設してある。このように複合材層自体を現地で組成しかつ設置するうえに、過大な輪荷重や外気温度差及び該複合材性能以上の伸縮変動により耐久性に問題点があった。
【０００８】
【課題を解決するための手段】
本発明は、各種道路等に架設された橋梁伸縮継手に於いて、道路に於ける車両の走行に伴って伸縮継手部材にかかる輪荷重等の荷重を、該伸縮継手部材の左右方向、つまり、道路幅員の左右方向に分散させると共に床版間又は裏込め部材間に設置した荷重支持板上に簡易かつ迅速に組付可能であって、耐久性を向上させた新規な橋梁伸縮継手の構造を提供することを目的としたものであって、次の構成、手段から成立する。
【０００９】
請求項１記載の発明によれば、一方、他方の床版間に介装された断面略Ｌ字状の荷重支持板と、該断面略Ｌ字状の荷重支持板上に嵌合する伸縮継手部材とでなり、該伸縮継手部材の表面に所定幅の略Ｓ字状リブを一連に形成すると共に該伸縮継手部材の底面部の断面が２つの略半円形状を連らねた形状を形成したことを特徴とする橋梁伸縮継手の構造である。
【００１０】
請求項２記載の発明によれば、一方の床版上に積層された一方の舗装部材と、他方の床版上に積層された他方の舗装部材と、該一方、他方の舗装部材に隣接して形成した一方、他方の裏込め部材と、該一方、他方の裏込め部材間に介装され断面略Ｌ字状の荷重支持板と、該断面略Ｌ字状の荷重支持板上に嵌合するものであって、前後に所望数の伸縮継手部材用アンカーバーを固定すると共に表面に所定幅の略Ｓ字状リブを一連に形成し、かつ底面部に断面が２つの略半円形状を連らねた形状を形成した伸縮継手部材を備え、前記断面略Ｌ字状の荷重支持板の側面部に前記伸縮継手部材用アンカーバーを挿通する嵌挿孔を形成したことを特徴とする橋梁伸縮継手の構造である。
【００１１】
請求項３記載の発明によれば、一方の床版上に積層された一方の舗装部材と、他方の床版上に積層された他方の舗装部材と、該一方、他方の舗装部材に隣接して形成した一方、他方の裏込め部材と、該一方、他方の裏込め部材間に介装され、かつ前後に所望数の荷重支持板用アンカーバーを固定した断面略Ｌ字状の荷重支持板と、該断面略Ｌ字状の荷重支持板上に嵌合するものであって、前後に所望数の伸縮継手部材用アンカーバーを固定すると共に表面に所定幅の略Ｓ字状リブを一連に形成し、かつ底面部に断面が２つの略半円形状を連らねた形状を形成した伸縮継手部材を備え、前記断面略Ｌ字状の荷重支持板の側面部に前記伸縮継手部材用アンカーバーを挿通する嵌挿孔を形成したことを特徴とする橋梁伸縮継手の構造である。
【００１２】
請求項４記載の発明によれば、一方の床版上に積層された一方の舗装部材と、他方の床版上に積層された他方の舗装部材と、該一方、他方の舗装部材に隣接して形成した一方、他方の裏込め部材と、該一方、他方の裏込め部材間に介装され、かつ前後に所望数の荷重支持板用アンカーバーを固定した断面略Ｌ字状の荷重支持板と、該断面略Ｌ字状の荷重支持板上に嵌合するものであって、前後に所望数の伸縮継手部材用アンカーバーを固定すると共に表面に所定幅の略Ｓ字状リブを一連に形成し、かつ底面部に断面が２つの略半円形状を連らねた形状を形成した伸縮継手部材を備え、前記断面略Ｌ字状の荷重支持板の側面部に前記伸縮継手部材用アンカーバーを挿通する所望数の嵌挿孔、及び該嵌挿孔とは別異の位置に所望数の皿ボルト挿入孔を形成し、該荷重支持板が皿ボルトで上記伸縮継手部材を嵌合固着したことを特徴とする橋梁伸縮継手の構造である。
【００１３】
請求項５記載の発明によれば、前記伸縮継手部材の左端部又は右端部に於ける上面又は下面に段差状の凸部又は凹部を形成したことを特徴とする請求項１、２、３又は４記載の橋梁伸縮継手の構造である。
【００１４】
請求項６記載の発明によれば、前記伸縮継手部材の下面部左右方向に沿って小溝を形成したことを特徴とする請求項１、２、３又は４記載の橋梁伸縮継手の構造である。
【００１５】
請求項７記載の発明によれば、前記伸縮継手部材は高純度クロロプレンゴム、天然ゴム、再生ゴム、高減衰ゴムの一つ又は二つ以上の組成物で成形したことを特徴とする請求項１、２、３又は４記載の橋梁伸縮継手の構造である。
【００１６】
請求項８記載の発明によれば、前記伸縮継手部材の表面に所定幅の略Ｓ字状リブを一連に形成した構成に於いて、該略Ｓ字状リブを前後方向略中央を分離し、かつ前方のリブ端部位置と後方のリブ端部位置を左右にずらして形成したことを特徴とする請求項１、２、３又は４記載の橋梁伸縮継手の構造である。
【００１７】
【発明の実施の形態】
本発明に係る橋梁伸縮継手の構造に於ける実施の形態について添付図面を参照しながら詳細に説明する。
【００１８】
図１ないし図３は、本発明に係る橋梁伸縮継手の構造に於ける実施の形態を示す一例であって、図１は垂直断面図、図２は伸縮継手部材の外観を示す平面図、図３は当該伸縮継手部材を示すものであって、（ａ）は図２の矢視Ｂ−Ｂ線方向から見た側面図、（ｂ）は図２の矢視Ｃ−Ｃ線方向から見た断面図である。
【００１９】
図１に於いて、２５は、例えば、高純度クロロプレンゴム、天然ゴム、再生ゴム、高減衰ゴム等の一つ又は二つ以上の組成物で構成された伸縮継手部材であって、その表面は図２に示すように全体として略Ｓ字状リブ２６を一連に形成している。該略Ｓ字状リブ２６は一方、及び他方のアーチリブ２６ａ、２６ｂを組合せ結合して構成されており、該一方のアーチリブ２６ａと他方のアーチリブ２６ｂは逆向きアーチに配設されている。また、前記伸縮継手部材２５の略中央部分には道路幅員方向に中間帯２５ａを介在させ、この中間帯２５ａに前記一方のアーチリブ２６ａの後端２６ａ１及び前記他方のアーチリブ２６ｂの前端２６ｂ１を臨ませている。一方のアーチリブの後端２６ａ１の位置と他方のアーチリブの前端２６ｂ１の位置をずらして設定し、具体的には図２に示す前記一方のアーチリブ２６ａの中心ラインＬ１と前記他方のアーチリブ２６ｂの中心ラインＬ２とは幅長Ｄ、すなわちリブ幅の略１本幅分を有してずらして設定している。このように構成したので、車両の走行に伴う輪荷重が当該伸縮継手部材２５に掛った場合、上記中間帯２５ａの部分に誘起される余分の回転モーメントやねじりモーメント等から生ずる偶力を発生させず、前記伸縮継手部材２５の一方のアーチリブ２６ａは道路幅員方向に於ける右方向、すなわち、Ｅ方向に、他方のアーチリブ２６ｂは左方向、すなわちＦ方向にそれぞれ圧縮変形する。
【００２０】
前記一方及び他方のアーチリブ２６ａ、２６ｂはそれぞれ所定間隔を有して所望数個、例えば、図２に於いては７個を一連に配設している。また、該一方及び他方のアーチリブ２６ａ、２６ｂの相互間は図３（ｂ）に示すようにつまり、該一方、他方アーチリブ２６ａ、２６ｂに隣接して所定幅を有してあって、該アーチリブ２６ａ、２６ｂの頂部から所定深さを有した防水膜２６ｃ、２６ｄを備えている。該防水膜２６ｃ、２６ｄは図３（ｂ）に示すようにその幅長Ｇが隣接する一方、他方アーチリブ２６ａ、２６ｂの幅長Ｈより若干幅広であって、肉薄状に形成している。
尚、本発明はこれに限定されず、防水膜２６ｃ、２６ｄの幅長Ｇは、上記アーチリブ２６ａ、２６ｂの幅長Ｈより狭く設定してもよい。
【００２１】
前記伸縮継手部材２５は中間帯２５ａを画成中心部とすれば、前方部分２５ｂと後方部分２５ｃに区分される。そして、図２に示すように前方部分２５ｂ及び後方部分２５ｃのそれぞれ左端部に形成したアーチリブ２６ａ、２６ｂの下面側には段差状の凹部２６ｅ、２６ｆを形成している。また、前方部分２５ｂ及び後方部分２５ｃのそれぞれ右端部の上面には、段差状の凸部２６ｇ、２６ｈを形成している。
而して、上記図２に示す伸縮継手部材２５は一つのブロック体として構成し、道路上に設置するためには道路幅員方向の長さに応じて、この一つのブロック体を相互つまり左右に連続して連結すればよい。その際、一つのブロック体としての前記前、後方部分２５ｂ、２５ｃの左端部の凹部２６ｅ、２６ｆ又は右端部の凸部２６ｇ、２６ｈを順次、次のブロック体の凸部又は凹部に噛合せて簡単かつ迅速に特別の緊締具や部材を要することなく結合することができる。
このように道路の幅員長さに応じて適宜組合せ可能となる特徴がある。
【００２２】
前記伸縮継手部材２５の前方部分２５ｂの前端つまり、前方壁面部には所望数の図２の例では２本の伸縮継手部材用アンカーバー２７ａ、２７ｂを、後方部分２５ｃの後端つまり後方壁面部には同様に伸縮継手部材用アンカーバー２８ａ、２８ｂを備えている。すなわち、この伸縮継手部材用アンカーバー２７ａ、２７ｂ、２８ａ、２８ｂは図３（ａ）で示すようにその先端２７ｃ、２７ｃ、２８ｃ、２８ｃはスタッド溶接により前記伸縮継手部材２５に予め固定されている。
尚、前記伸縮継手部材２５の前後の内部に雌めじを有した鋼板等を埋込み、これに螺合部をねじ込むことにより予め固定することもできる。
【００２３】
前記伸縮継手部材２５の底面部は図１及び図３（ａ）に示すようにその側面側から見て２つの半円状２５ｄ、２５ｅを連らねた形状を形成している。この半円状２５ｄ、２５ｅはそれぞれ貫通孔２５ｇ、２５ｈによって形成されており、前記伸縮継手部材２５の前方部分２５ｂの底面部には上記半円状２５ｄの貫通孔２５ｇを後方部分２５ｃの底面部には上記半円状２５ｅの貫通孔２５ｈをそれぞれ、道路幅員方向に延在して形成している。また、当該半円状２５ｄ、２５ｅに隣接する前後部位には所望数の小溝２５ｆ、２５ｆ、２５ｆ、２５ｆをそれぞれ道路幅員方向に上記貫通孔２５ｇ、２５ｈと同様に形成している。
このように前記伸縮継手部材２５の底面部は上記半円状２５ｄ、２５ｅの貫通孔２５ｇ、２５ｈや小溝２５ｆ、２５ｆ、２５ｆ、２５ｆを形成することにより全体として平坦状に形成されておらず道路上に装着した際、後述する荷重支持板上にその全面、全域が接触しない構成となっている。
【００２４】
２９は荷重支持板であって２つの各個の荷重支持板の組合せで構成し、その各個の荷重支持板の断面形状が略Ｌ字状に形成されかつ、各種の鋼材で形成されている。該荷重支持板２９は、下方に略Ｖ字状支持枠を有したブラケット２９ａ及び２９ｂを備え、一方、他方の裏込め部材３０、３１間又は一方、他方のパラペットを含む床版３２、３３間に介装されている。４０、４１は一方、他方の舗装部材であり、両裏込め部材３０、３１に隣接して配置されてあって、該床版３２、３３の面上に敷設している。前記荷重支持板２９は前方の側面部２９ｃ及び後方の側面部２９ｄに於ける道路幅員方向の所定箇所に前記伸縮継手部材用アンカーバー２７ａ、２７ｂ及び２８ａ、２８ｂに挿入する所望数個つまり、伸縮継手部材用アンカーバーの数と同数のアンカーバー嵌挿孔２９ｅ、２９ｅ、２９ｆ、２９ｆを貫通して配設している。上記荷重支持板２９のそれぞれ各個の荷重支持板の内面は、例えば歯形状の底面部を有し、これを互いに対向配置している。そして前記荷重支持板２９の内面に伸縮継手部材２５を嵌合する方法は前記伸縮継手部材用アンカーバー２７ａ、２７ｂ及び２８ａ、２８ｂをアンカーバー嵌挿孔２９ｅ、２９ｅ、２９ｆ、２９ｆに挿通した後、２個で構成された荷重支持板２９を側方から押し込んで該伸縮継手部材２５を嵌合固定する。
【００２５】
尚、上記伸縮継手部材２５の前方壁面部及び後方壁面部に伸縮継手部材用アンカーバーねじ込み孔等や鋼板を形成し、予め該伸縮継手部材２５に伸縮継手部材用アンカーバー２７ａ〜２８ｂを備えることなく該伸縮継手部材２５を前記荷重支持板２９の内面に嵌挿した後に、荷重支持板２９の両側面部２９ｃ、２９ｄの外部から該伸縮継手部材用アンカーバー２７ａ、２７ｂ、２８ａ、２８ｂをアンカーバー嵌挿孔２９ｅ、２９ｅ、２９ｆ、２９ｆに挿通して上記伸縮継手部材用アンカーバーねじ込み孔等に固定する方法としてもよい。
【００２６】
３４、３５は所望数の皿ボルトであって、前記荷重支持板２９の前方及び後方の側面部２９ｃ、２９ｄに於ける道路幅員方向の所定箇所に設けた皿ボルト挿入孔３４ａ、３５ａに該側面部２９ｃ、２９ｄの外方からねじ込む。該皿ボルト３４、３５の先端は皿ボルト挿入孔３４ａ、３５ａ内にねじ込まれた後、該伸縮継手部材２５の前方及び後方の壁面部までねじ込まれ固定している。このように構成したので、伸縮継手部材２５は、荷重支持板２９の内面上に堅固に固定され、当該橋梁伸縮継手は道路上にかかる各種輪荷重に耐え得るように設計されている。尚、上記皿ボルト挿入孔３４ａ、３５ａの配設位置は前記アンカーバー嵌挿孔２９ｅ、２９ｅ、２９ｆ、２９ｆとは別異の位置に設定している。
【００２７】
また、前記荷重支持板２９の前方、後方の側面部２９ｃ、２９ｄの外面には、所望数の荷重支持板用アンカーバー３６、３７を突設している。該荷重支持板用アンカーバー３６、３７はいわゆる異形棒鋼スタッドといわれるもので、その先端に向って略Ｌ字状に曲折形成してあって、前記伸縮継手部材用アンカーバー２７ａ〜２８ｂよりは、長大に設計されている。そして、該荷重支持板用アンカーバー３６、３７は道路幅員方向であって、伸縮継手部材用アンカーバー２７ａ〜２８ｂを上記裏込め部材３０、３１内に装置した際、その伸縮継手部材用アンカーバー２７ａ〜２８ｂの相互間に位置するように配設されている。
【００２８】
また、上記荷重支持板用アンカーバー３６、３７は上記床版３２及び３３に組込まれた略Ｕ字状アンカー鉄筋３６ａ、３７ａと添接し、更に、該荷重支持板用アンカーバー３６、３７は道路幅員方向に張設した多数の補強鉄筋３８、３９と組合せて床版３２、３３と裏込め部材３０、３１との連結性を高めると共に裏込め部材３０、３１自体を補強し、加えて伸縮継手部の強化を図っている。
【００２９】
また、図中４２は、防水シートであり、前記伸縮継手部材２５の底面部と荷重支持板２９の内面との間に介装されかつ道路幅員方向に延在させている。防水シート４２により、道路上を車両が走行するに伴い発生する雨水や塵埃の浸入を阻止する。
尚、本発明は係る橋梁伸縮継手の構造は、元来、防水効果を高めた構造であるので実施化するに当り、当該防水シート４２は必ずしも配設する必要はない。
また、４３は一方、他方の床版３２、３３間に存在するジョイント遊間である。
【００３０】
次に、本発明に係る橋梁伸縮継手の構造の実施の形態に於ける道路への組付手順やその動作等を説明する。
【００３１】
先づ、道路の施工現場以外の例えば、工場等で前記伸縮継手部材２５や荷重支持板用アンカーバー３６、３７を備えた荷重支持板２９を製作する。そして、現場に於ける施工に際し、これら伸縮継手部材２５及び荷重支持板２９を搬送する。現場ではＵ字状アンカー鉄筋３６ａ、３７ａ等を配備した一方、他方の床版３２、３３は構築されており、この床版３２、３３間であって、その上部に上記荷重支持板２９を設置すると共に、該伸縮継手部材２５を該荷重支持板２９の上面に又は内面に嵌合した後、例えばコンクリート部材でなる一方、他方の裏込め部材３０、３１を打設して完成する。そして前記一方の舗装部材４０、及び他方の舗装部材４１を前記裏込め部材３０、３１に面一に隣接させかつ一方、他方の床版３２、３３上に敷設する。
【００３２】
ところで、上記伸縮継手部材２５は前述したように予め、伸縮継手部材用アンカーバー２７ａ、２７ｂ、２８ａ、２８ｂを固定しており、伸縮継手部材用アンカーバー２７ａ、２７ｂに先づ、該荷重支持板２９の一つの方の前方側面部２９ｃのアンカーバー嵌挿孔２９ｅ、２９ｅが挿通され、次に伸縮継手部材用アンカーバー２８ａ、２８ｂに該荷重支持板２９の他の方の後方側面部２９ｄのアンカーバー嵌挿孔２９ｆ、２９ｆが挿通された後、側方から荷重支持板２９を該伸縮継手部材２５の前方及び後方部分２５ｂ、２５ｃに押し込むことにより容易かつ、迅速に伸縮継手部材２５を前記荷重支持板２９に嵌合固定することができる。
尚、上記伸縮継手部材用アンカーバー２７ａ、２７ｂ、２８ａ、２８ｂは上記荷重支持板２９の各側面部２９ｃ、２９ｄの外方からアンカーバー嵌挿孔２９ｅ、２９ｅ、２９ｆ、２９ｆを挿通させて後付けすることも可能である。
【００３３】
そして、本発明は係る橋梁伸縮継手の構造は、各種の道路上に施工されてあって、外気温度差や桁の回転モーメントにより前記伸縮継手部材２５が図２に示すＩ方向及びＪ方向に圧縮、引張作用を行う。
而して、一方では当該伸縮継手部材２５の前方部分２５ｂの表面に形成したアーチリブ２６ａ及び前方部分２５ｂがアーチ方向、つまりＥ方向（右側方向）に変形する。他方では、当該伸縮継手部材２５の後方部分２５ｃの表面に形成したアーチリブ２６ｂ及び後方部分２５ｃがアーチ方向つまりＦ方向（左側方向）に変形する。この変形量は、２つのアーチリブにより分散され実験結果によれば、仮に、本発明の如く両リブ２６ａ、２６ｂを備えてなる略Ｓ字状リブによることなく、当該伸縮継手部材２５を２つに画成することなく、一つのリブのみで構成した場合に比べその変形量が半減することとなり、地覆部のリブ伸縮のためのスペースを小さく設定でき、しかも、当該伸縮継手部材２５自体に於ける道路方向の幅長を短かくできる。
【００３４】
また、上記のように伸縮継手部材２５がＥ方向及びＦ方向に変形するに際し、一方のアーチリブの後端２６ａ１の位置と他方のアーチリブの前端２６ｂ１の位置をずらし、例えばリブ１本分の幅長分をずらして設定したので中間帯２５ａ部分に回転モーメントや曲げモーメント、ねじりモーメント等の偶力が作用しなくなり、両アーチリブ２６ａ、２６ｂをそれぞれ右側方向及び左側方向に並行に変位させると共にＩ方向及びＪ方向の圧縮・引張り作用も円滑に許容し、当該伸縮継手部材２５にかかる外気温度の差による伸縮作用や桁回転モーメントを吸収することができる。
而して、該底面部は断面が２つの略半円状２５ｄ、２５ｅを連ねた形状を有する貫通孔２５ｇ、２５ｈを形成しており、その全面、全域部分について荷重支持板２９と接触しておらず、これにより、当該圧縮荷重を該貫通孔２５ｇ、２５ｈで分散し、防水シート４２や荷重支持板２９と接触する部分は一部となり、その接触面積を極力狭くするので当該圧縮荷重を大幅に低減させ伸縮継手部材２５等の耐久性を向上させた。しかも、繰返し伸縮継手部材２５にかかる輪荷重による荷重支持板の表面を叩く打撃音を押さえ込み車両走行に伴う通過騒音を大幅に低減すると共に伸縮継手部材２５の底面部の摩耗を防止した。
実験結果によれば、伸縮継手部材２５の底面部の全面、全域を該荷重支持板２９の表面に接触させる構成に比し、該荷重支持板２９にかかる圧縮荷重を約３割程度低減させることができた。
【００３５】
更に、上述した伸縮継手部材２５の左側、右側方向の変形に伴い、上記伸縮継手部材２５の底面部の構成に加えて、図２及び図３（ｂ）に示すように一方、他方アーチリブ２６ａ、２６ｂに隣接して防水膜２６ｃ、２６ｄを形成し及び前記の伸縮継手部材２５の底面部の貫通孔２５ｇ、２５ｈの前後に小溝２５ｆを形成したので、これらも同様に変形作用させる。そして、当該伸縮継手部材２５の中央部分に中間帯２５ａを介在させることにより防水膜２６ｃ、２６ｄの変形量を少なく設定でき当該伸縮継手部材２５の底面部が荷重支持板２９の表面からの浮き上り現象を防止し併せて、前記伸縮継手部材２５の一方のアーチリブ２６ａと他方のアーチリブ２６ｂとの連結性を保持し、離開現象や変形を防ぐと共に、上記伸縮部材２５の耐久性の向上を実現し、輪荷重に伴い発生する通過騒音を更に低減させることができた。
【００３６】
また、前記伸縮継手部材２５は上記荷重支持板２９に嵌合固定するに当り、該荷重支持板２９の前方側面部２９ｃ及び後方側面部２９ｄから皿ボルト３４、３５を螺入させて該伸縮継手部材２５を結合すること、更に、上記伸縮継手部材２５に備えた伸縮継手部材用アンカーバー２７ａ、２７ｂ、２８ａ、２８ｂ及び荷重支持板用アンカーバー３６、３７を裏込め部材３０、３１の打設工程に合せて該裏込め部材３０、３１内に固着するので、当該伸縮継手部材２５に過大な輪荷重がかかり、しかも、伸縮継手部材２５に撓み作用が加わっても該伸縮継手部材２５の前後端面と荷重支持板２９の前方、後方の一つ、他の側面部２９ｃ、２９ｄとの間に隙間が生ずることなく、また雨水等の浸入もなく両者の嵌合固定状態は常に安定している。
【００３７】
【発明の効果】
本発明に係る該橋梁伸縮継手の構造は叙上した構成、作用等を具有するので次の効果がある。
【００３８】
請求項１記載の発明によれば、一方、他方の床版間に介装された断面略Ｌ字状の荷重支持板と、該断面略Ｌ字状の荷重支持板上に嵌合する伸縮継手部材とでなり、該伸縮継手部材の表面に所定幅の略Ｓ字状リブを一連に形成すると共に該伸縮継手部材の底面部の断面が２つの略半円形状を連らねた形状を形成したことを特徴とする橋梁伸縮継手の構造を提供する。
このような構成としたので、車両が道路を通過するに伴う輪荷重を左側、又は右側に分散して前記伸縮継手部材や略Ｓ字状リブの変形量を少なく設定し、地覆部の伸縮用スペースを小さく設定でき、雨水や塵埃の滞留による漏水現象を防止し、併せて車両走行に伴う通過騒音を大幅に低減できる効果がある。
また、前記伸縮継手部材の底面部に２つの略半円形状に連ねた形状を形成し、荷重支持板上への接触面積を小さくして、その半円状の貫通孔を道路幅員方向に延在させたので該伸縮継手部材にかかる圧縮荷重を分散させ、かつ荷重支持板上にかかる荷重を極めて低く設定するので、施工時に於ける圧縮荷重のセッティングを容易にし、該伸縮継手部材の成形材料の低減を行いおよび浮き上り現象を防止して車両の通過に伴い発生する通過騒音を更に低減させる量産性の高い技術を提供する効果がある。
【００３９】
請求項２記載の発明によれば、一方の床版上に積層された一方の舗装部材と、他方の床版上に積層された他方の舗装部材と、該一方、他方の舗装部材に隣接して形成した一方、他方の裏込め部材と、該一方、他方の裏込め部材間に介装され断面略Ｌ字状の荷重支持板と、該断面略Ｌ字状の荷重支持板上に嵌合するものであって、前後に所望数の伸縮継手部材用アンカーバーを固定すると共に表面に所定幅の略Ｓ字状リブを一連に形成し、かつ底面部に断面が２つの略半円形状を連らねた形状を形成した伸縮継手部材を備え、前記断面略Ｌ字状の荷重支持板の側面部に前記伸縮継手部材用アンカーバーを挿通する嵌挿孔を形成したことを特徴とする橋梁伸縮継手の構造を提供する。
このような構成としたので、上記請求項１の効果に加えて、当該伸縮継手部材を六角ボルトや各種ボルト等を使用して荷重支持板上に固定する必要なく、該ボルト等の部品点数を削減し、しかもボルト等がないので、伸縮継手部材の荷重支持板からの脱落や損傷がなく、もって高品質の橋梁伸縮継手の構造を提供でき、該伸縮継手部材を荷重支持板上に嵌合固定する工程が極めて簡単かつ迅速にできる効果がある。
【００４０】
請求項３記載の発明によれば、一方の床版上に積層された一方の舗装部材と、他方の床版上に積層された他方の舗装部材と、該一方、他方の舗装部材に隣接して形成した一方、他方の裏込め部材と、該一方、他方の裏込め部材間に介装され、かつ前後に所望数の荷重支持板用アンカーバーを固定した断面略Ｌ字状の荷重支持板と、該断面略Ｌ字状の荷重支持板上に嵌合するものであって、前後に所望数の伸縮継手部材用アンカーバーを固定すると共に表面に所定幅の略Ｓ字状リブを一連に形成し、かつ底面部に断面が２つの略半円形状を連らねた形状を形成した伸縮継手部材を備え、前記断面略Ｌ字状の荷重支持板の側面部に前記伸縮継手部材用アンカーバーを挿通する嵌挿孔を形成したことを特徴とする橋梁伸縮継手の構造を提供する。
このような構成としたので、請求項１及び２記載の発明の効果に加えて、前記伸縮継手部材２５に備えた伸縮継手部材用アンカーバー及び荷重支持板用アンカーバーを裏込め部材の打設工程に合せて、該裏込め部材内に固着するので、当該伸縮継手部材に外気温度差による過大な伸縮作用や桁の回転又は、撓み作用が加わっても当該伸縮継手部材と荷重支持板間に隙間が生ずることなく、また雨水等の浸入もなく、両者間の嵌合状態を常に緊密化し、当該伸縮継手部材若しくは本橋梁伸縮継手の耐久性の向上を図る効果がある。
【００４１】
請求項４記載の発明によれば、一方の床版上に積層された一方の舗装部材と、他方の床版上に積層された他方の舗装部材と、該一方、他方の舗装部材に隣接して形成した一方、他方の裏込め部材と、該一方、他方の裏込め部材間に介装され、かつ前後に所望数の荷重支持板用アンカーバーを固定した断面略Ｌ字状の荷重支持板と、該断面略Ｌ字状の荷重支持板上に嵌合するものであって、前後に所望数の伸縮継手部材用アンカーバーを固定すると共に表面に所定幅の略Ｓ字状リブを一連に形成し、かつ底面部に断面が２つの略半円形状を連らねた形状を形成した伸縮継手部材を備え、前記断面略Ｌ字状の荷重支持板の側面部に前記伸縮継手部材用アンカーバーを挿通する所望数の嵌挿孔、及び該嵌挿孔とは別異の位置に所望数の皿ボルト挿入孔を形成し、該荷重支持板が皿ボルトで上記伸縮継手部材を嵌合固着したことを特徴とする橋梁伸縮継手の構造を提供する。
このような構成としたので、請求項１ないし３記載の発明の効果に加えて、荷重支持板の側面部から所望数の皿ボルトで伸縮継手部材を固定したので、更に伸縮継手部材と荷重支持板との密着度合を高め、更なる伸縮継手部材若しくは、当該当該橋梁伸縮継手の耐久性を保持し、併せて漏水現象を完全に防止し外気温度差による伸縮作用や桁の回転を吸収し著大な輪荷重にも耐え得る効果がある。
【００４２】
請求項５記載の発明によれば、前記伸縮継手部材の左端部又は右端部に於ける上面又は下面に段差状の凸部又は凹部を形成したことを特徴とする請求項１、２、３又は４記載の橋梁伸縮継手の構造を提供する。
このような構成としたので、請求項１ないし４記載の発明の効果に加えて、当該伸縮継手部材を例えば、幅約１８００（ｍｍ）を一つのブロック体として構成し、かつ施工する道路幅員に応じて、順次多数固を列設することにより道路状況に適合してセッティングさせることができること及び、これを使用後に於いて破損した箇所があれば当該補修を必要とするブロック体のみを取り替えて修理を可能とする効果がある。
【００４３】
請求項６記載の発明によれば、前記伸縮継手部材の下面部左右方向に沿って小溝を形成したことを特徴とする請求項１、２、３又は４記載の橋梁伸縮継手の構造を提供する。
このような構成としたので、請求項１ないし４記載の発明の効果に加えて、伸縮継手部材にかかる圧縮荷重を更に分散させかつ伸縮継手部材の荷重支持板上から浮き上り現象を防止し併せて、更に、道路上の車両通過に伴う通過騒音を大幅に低減させる効果がある。
【００４４】
請求項７記載の発明によれば、前記伸縮継手部材は高純度クロロプレンゴム、天然ゴム、再生ゴム、高減衰ゴムの一つ又は二つ以上の組成物で成形したことを特徴とする請求項１、２、３又は４記載の橋梁伸縮継手の構造を提供する。
このような構成としたので、請求項１ないし４記載の発明の効果に加えて伸縮継手部材を汎用の伸縮ゴムで構成したので施工性及び量産性の高い伸縮継手部材を提供する効果がある。
【００４５】
請求項８記載の発明によれば、前記伸縮継手部材の表面に所定幅の略Ｓ字状リブを一連に形成した構成に於いて、該略Ｓ字状リブを前後方向略中央を分離し、かつ前方のリブ端部位置と後方のリブ端部位置を左右にずらして形成したことを特徴とする請求項１、２、３又は４記載の橋梁伸縮継手の構造を提供する。
このような構成としたので、請求項１ないし４記載の発明の効果に加えて外気温度差による伸縮作用や桁の回転が当該伸縮継手部材に加わった場合一方、他方のアーチリブ間に回転モーメント等の偶力を発生させず伸縮継手部材の前後に発生する圧力荷重を該伸縮継手部材の左側及び右側に巧みに並行方向に分散させかつ、圧縮、引張させて当該伸縮継手部材を異形変形させることなく、耐久性を向上させる効果がある。
【図面の簡単な説明】
【図１】本発明に係る橋梁伸縮継手の構造に於ける実施の形態示す垂直断面図である。
【図２】本発明に係る伸縮継手部材に於ける実施の形態の一例であって、その外観形状を示す平面図である。
【図３】本発明係る伸縮継手部材に於ける実施の形態の一例を示すものであり、（ａ）は、図２の矢視Ｂ―Ｂ線方向から見た側面図、（ｂ）は図２の矢視Ｃ―Ｃ線方向から見た断面図である。
【図４】従来技術に於ける第１の例を示す橋梁伸縮継手の構造であって、（ａ）は、（ｂ）の矢視Ａ―Ａ線方向の断面図、（ｂ）は、（ａ）平面図である。
【図５】従来の技術に於ける第２の例を示す橋梁伸縮継手の構造の斜視図ある。
【符号の説明】
１伸縮ゴム
１ａＶ字状溝
１ｂＶ字状溝
２一方の床版
３他方の床版
４一方の裏込め部材
５他方の裏込め部材
６ジョイント遊間
７荷重支持板
８ベースプレート
８ａボルト挿入孔
９ベースプレート
９ａボルト挿入孔
１０六角ボルト
１１六角ボルト
１２、１３ナット
１４一方のアンカーボルト
１５他方のアンカーボルト
１６一方の舗装部材
１７他方の舗装部材
１８、１９補強鉄筋
２０、２１アンカー鉄筋
２２伸縮ゴム
２２ａ鋼板
２３サポートブロック
２３ａサポートブロックの立設部
２３ｂサポートブロックのフィンガー状の支持板
２３ｃ皿ボルト
２４サポートブロック
２４ａサポートブロックの立設部
２４ｂサポートブロックのフィンガー状の支持板
２４ｃ皿ボルト
２５伸縮継手部材
２５ａ伸縮継手部材の中間帯
２５ｂ伸縮継手部材の前方部分
２５ｃ伸縮継手部材の後方部分
２５ｄ、２５ｅ半円状
２５ｆ小溝
２５ｇ、２５ｈ貫通孔
２６略Ｓ字状リブ
２６ａ一方のアーチリブ
２６ａ１一方のアーチリブの後端
２６ｂ他方のアーチリブ
２６ｂ１他方のアーチリブの前端
２６ｃ、２６ｄ防水膜
２６ｅ、２６ｆ段差状の凹部
２６ｇ、２６ｈ段差状の凸部
２７ａ、２７ｂ伸縮継手部材用アンカーバー
２８ａ、２８ｂ伸縮継手部材用アンカーバー
２７ｃ、２８ｃ伸縮継手部材用アンカーバーの先端
２９荷重支持板
２９ａ、２９ｂブラケット
２９ｃ荷重支持板の前方の側面部
２９ｄ荷重支持板の後方の側面部
２９ｅ、２９ｆアンカーバー嵌挿孔
３０一方の裏込め部材
３１他方の裏込め部材
３２一方の床版
３３他方の床版
３４皿ボルト
３４ａ皿ボルト挿入孔
３５皿ボルト
３５ａ皿ボルト挿入孔
３６、３７荷重支持板用アンカーバー
３６ａ、３７ａＵ字状アンカー鉄筋
３８、３９補強鉄筋
４０一方の舗装部材
４１他方の舗装部材
４２防水シート
Ｄ一方及び他方のアーチリブのずれ幅
Ｅ一方のアーチリブの変形方向（右側方向）
Ｆ他方のアーチリブの変形方向（左側方向）
Ｇ防水膜の幅長
Ｈ一方、他方のアーチリブの幅長
Ｉ前方部分の圧縮作用の方向
Ｊ後方部分の圧縮作用の方向[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a structure of a road bridge structure in a river, a valley, an elevated road, various roads, and the like, and relates to a structure of a bridge expansion joint interposed between backfill members or floor slabs.
[0002]
[Prior art]
Conventionally, as a first example of the structure of this type of bridge expansion joint, the structure shown in FIG. 4 was used. 4A is a cross-sectional view taken along line AA of FIG. 4B, and FIG. 4B is a plan view of FIG.
Describing this, reference numeral 1 denotes an elastic rubber constituting a main part of the bridge expansion joint. As shown in FIG. 4 (b), the elastic rubber 1 has two substantially V-shaped grooves in front and rear of the surface and in the width direction of the road. The elastic rubber 1 is made of, for example, backfill concrete laminated on the upper part between the other floor slabs 2, 3, and is interposed between the other backfill members 4, 5. On the other hand, between the other floor slabs 2 and 3 is a floor slab play space 6, in which the load supporting plate 7 is buried in the elastic rubber 1 located above and extending in the width direction of the road. In addition, base plates 8 and 9 are buried in the elastic rubber 1 between the upper surfaces of the one and the other backfill members 4 and 5 and the bottom surface of the elastic rubber 1, and are pierced in the base plates 8 and 9. As shown in FIG. 4 (b), the hexagonal bolts 10 and 11 are inserted into the plurality of bolt insertion holes 8a and 9a at predetermined intervals in the direction of the width of the road, and the nuts 12 and 13 are tightened. Is fixed to one of the back-filling members 4 and 5, and the above-mentioned hexagonal bolts 10 and 11 are connected to one and the other anchor bolts 14 and 15, respectively.
In the figure, reference numerals 16 and 17 denote one and the other pavement members laminated on the one and the other floor slabs 2 and 3, respectively. Reference numerals 18 and 19 denote reinforcing reinforcing bars provided on the backing members 4 and 5 on the other hand. 20 and 21 are anchor reinforcing bars disposed on the one and the other backfill members 4 and 5 and the one and the other floor slabs 2 and 3.
[0003]
Next, as a second example in the prior art, there was a structure of a bridge expansion joint as shown in FIG. FIG. 5 shows a perspective view of the bridge expansion joint.
Explaining this, reference numeral 22 denotes an elastic rubber which is formed of an elastic rubber material, is defined in upper and lower layers, and has a series of rectangular cavities formed in the upper and lower layers, respectively. The elastic rubber 22 is interposed between support blocks 23 and 24 which are arranged on the other floor slabs 2 and 3 and made of, for example, steel. The support blocks 23, 24 are provided with upright portions 23a, 24a which are provided upright on the floor slabs 2, 3 with the joint play 6 interposed therebetween, and are provided on respective opposing surfaces of the upright portions 23a, 24a. Finger-shaped support plates 23b and 24b are formed to protrude. After the elastic rubber 22 is inserted between the upright portions 23a and 24a of the support blocks 23 and 24, it is supported by the support plates 23b and 24b. Further, a steel plate 22a is buried in the side surface of the elastic rubber 22 on the side of the standing portions 23a, 24a so as to extend in the width direction of the road, and a plurality of flat head bolts provided in the standing portions 23a, 24a are provided. The elastic rubber 22 is fixed to the support blocks 23 and 24 by screwing 23c and 24c to the steel plate 22a.
In FIG. 5, other components are substantially the same as those in FIG. 4, and are denoted by the same reference numerals, and description thereof is omitted.
[0004]
Still another example of the prior art is a bridge expansion joint disclosed in Japanese Patent Application Laid-Open Publication No. 2001-234504. This technique has a structure in which a composite material layer is placed on a floor slab, and a rubber mesh is embedded in the composite material layer across a play.
[0005]
[Problems to be solved by the invention]
Since the conventional technology has the configuration described above, the following problems exist.
That is,
In the first example, the elastic rubber 1 is inserted into the base plates 8 and 9 from the upper side to the lower side by hexagonal bolts 10 and 11 and the like, and then the upper surfaces of the base plates 8 and 9 are nuts 12 and 13. Each time the vehicle passes through the road, the wheel load is repeatedly applied to the surface of the elastic rubber 1 and the hexagonal bolts 10 and 11 and the nuts 12 and 13 are loosened. Then, the elastic rubber 1 is compressed and expanded and contracted in the front-rear direction, so that the elastic rubber 1 floats from the back-filling members 4 and 5 and gives an impact to the back-filling members 4 and 5 by running the vehicle. As a result, there is a problem that a crack phenomenon or a deterioration phenomenon of the elastic rubber 1 is induced, noise is generated due to vehicle running, and the other floor slabs 2 and 3 are damaged.
Further, in the first example, each time the vehicle passes through the road, the wheel load is applied to the two substantially V-shaped grooves 1a and 1b formed on the surface of the elastic rubber 1 so as to apply the wheel load. The V-shaped grooves 1a and 1b may be deformed and the joint rubber 1 may burst from the V-shaped grooves 1a and 1b, and rainwater or dust may enter from the ruptured or cracked portions, and a water leakage phenomenon is induced. There was a problem that.
[0006]
In the second example, the elastic rubber 22 has its entire bottom surface in contact with and supported by finger-shaped support plates 23b and 24b, and also has flat head bolts 23 from the upright portions 23a and 24a of the support blocks 23 and 24. By screwing in 23c and 24c, they are fixed to the support blocks 23 and 24.
Thus, similarly to the first example of the prior art, each time the vehicle passes through the road, a wheel load is repeatedly applied to the surface of the elastic rubber 22 to fix the countersunk bolts 23c and 24c. The portion is loosened or the countersunk bolts 23c and 24c are damaged, the elastic rubber 22 jumps out of the support blocks 23 and 24, and the number of assembly steps of the elastic rubber 22 to the support blocks 23 and 24 is greatly increased. As in the case of the first example, the entire bottom surface of the elastic rubber 22 comes into contact with the support plates 23b and 24b.
[0007]
Further, the technology disclosed in the patent publication of Japanese Patent Application Laid-Open No. 2001-234504 shows an expansion joint device called a so-called seamless expansion joint, in which a composite material layer made of rubber chips, silica sand, a binder or the like is provided between pavement layers. A rubber mesh is embedded in the composite material layer. As described above, in addition to the composition and installation of the composite material layer itself, there is a problem in durability due to an excessive wheel load, an outside air temperature difference, and a change in expansion and contraction exceeding the performance of the composite material.
[0008]
[Means for Solving the Problems]
The present invention, in a bridge expansion joints installed on various roads and the like, a load such as a wheel load applied to the expansion joint member with the travel of the vehicle on the road, the left and right direction of the expansion joint member, that is, A new bridge expansion joint structure with improved durability that can be easily and quickly assembled on a load support plate installed between floor slabs or backfill members while dispersing the road width in the left-right direction. It is intended to provide, and is constituted by the following configuration and means.
[0009]
According to the first aspect of the present invention, on the other hand, a load supporting plate having a substantially L-shaped cross section interposed between the other floor slabs, and an expansion joint fitted on the load supporting plate having a substantially L-shaped cross section. The expansion joint member is formed with a series of substantially S-shaped ribs having a predetermined width on the surface of the expansion joint member, and the cross section of the bottom surface of the expansion joint member has a shape in which two substantially semicircular shapes are connected. This is a structure of a bridge expansion joint characterized by the following.
[0010]
According to the invention described in claim 2, one pavement member laminated on one floor slab, the other pavement member laminated on the other floor slab, and the one and the other pavement member are adjacent to each other. The other backing member, a load supporting plate interposed between the one and the other backing members, and having a substantially L-shaped cross section, fitted on the load supporting plate having a substantially L-shaped cross section. The anchor bar for a desired number of expansion joint members is fixed back and forth, and a series of substantially S-shaped ribs of a predetermined width are formed in series on the surface, and a substantially semicircular cross section having two cross sections on the bottom surface. A bridge comprising an expansion joint member formed in a continuous shape, and a fitting hole through which the anchor bar for the expansion joint member is inserted is formed in a side surface of the load support plate having a substantially L-shaped cross section. This is the structure of the expansion joint.
[0011]
According to the invention described in claim 3, one pavement member laminated on one floor slab, the other pavement member laminated on the other floor slab, and one pavement member adjacent to the one and the other pavement member And the other backing member, and a load supporting plate having a substantially L-shaped cross-section, interposed between the one and the other backing members and having a desired number of anchor bars for load supporting plates fixed in front and back. And a predetermined number of expansion joint member anchor bars are fixed back and forth and a series of substantially S-shaped ribs of a predetermined width are fixed on the load support plate having a substantially L-shaped cross section. An expansion joint member formed on the bottom surface and having a shape formed by connecting two substantially semi-circular sections on the bottom surface, and an anchor for the expansion joint member on a side surface of the load support plate having a substantially L-shaped cross section. This is a structure of a bridge expansion joint, wherein a fitting insertion hole through which a bar is inserted is formed.
[0012]
According to the invention as set forth in claim 4, one pavement member laminated on one floor slab, the other pavement member laminated on the other floor slab, and the one and the other pavement member are adjacent to each other. And the other backing member, and a load supporting plate having a substantially L-shaped cross-section, interposed between the one and the other backing members and having a desired number of anchor bars for load supporting plates fixed in front and back. And a predetermined number of expansion joint member anchor bars are fixed back and forth and a series of substantially S-shaped ribs of a predetermined width are fixed on the load support plate having a substantially L-shaped cross section. An expansion joint member formed on the bottom surface and having a shape formed by connecting two substantially semi-circular sections on the bottom surface, and an anchor for the expansion joint member on a side surface of the load support plate having a substantially L-shaped cross section. Insert the desired number of fitting holes through which the bar is inserted, and insert the desired number of countersunk bolts at a different position from the fitting holes It is formed and in 該荷 heavy support plate countersunk bolt the structure of the bridge expansion joint, characterized in that the fitting fixed to the expansion joint member.
[0013]
According to the fifth aspect of the present invention, a step-shaped convex portion or a concave portion is formed on an upper surface or a lower surface at a left end or a right end of the expansion joint member. It is a structure of the bridge expansion joint of 4.
[0014]
According to the sixth aspect of the present invention, there is provided the structure of the bridge expansion joint according to any one of the first, second, third and fourth aspects, wherein a small groove is formed along the lower left and right direction of the expansion joint member.
[0015]
According to the invention described in claim 7, the expansion joint member is formed of one or more compositions of high-purity chloroprene rubber, natural rubber, recycled rubber, and high-damping rubber. It is a structure of the bridge expansion joint of 2, 3, or 4.
[0016]
According to the invention as set forth in claim 8, in a configuration in which substantially S-shaped ribs having a predetermined width are formed in series on the surface of the expansion joint member, the substantially S-shaped ribs are separated substantially at the center in the front-rear direction, 5. The bridge expansion joint structure according to claim 1, wherein the front rib end position and the rear rib end position are shifted left and right.
[0017]
BEST MODE FOR CARRYING OUT THE INVENTION
Embodiments of the structure of a bridge expansion joint according to the present invention will be described in detail with reference to the accompanying drawings.
[0018]
1 to 3 show an example of an embodiment of a structure of a bridge expansion joint according to the present invention. FIG. 1 is a vertical sectional view, and FIG. 2 is a plan view showing an appearance of an expansion joint member. 3 shows the expansion joint member, wherein (a) is a side view as seen from the direction of the arrow BB in FIG. 2, and (b) is a view as seen from the direction of the line CC in FIG. 2. It is sectional drawing.
[0019]
In FIG. 1, reference numeral 25 denotes an expansion joint member composed of one or more compositions of, for example, high-purity chloroprene rubber, natural rubber, recycled rubber, high-damping rubber, and the like. As shown in FIG. 2, substantially S-shaped ribs 26 are formed in series as a whole. The substantially S-shaped rib 26 is formed by combining and combining one and the other arch ribs 26a and 26b, and the one arch rib 26a and the other arch rib 26b are disposed in opposite arches. Further, an intermediate band 25a is interposed in a substantially central portion of the expansion joint member 25 in the width direction of the road, and the rear end 26a1 of the one arch rib 26a and the front end 26b1 of the other arch rib 26b face the intermediate band 25a. ing. The position of the rear end 26a1 of one arch rib and the position of the front end 26b1 of the other arch rib are set to be different from each other. Specifically, the center line L1 of the one arch rib 26a and the center line of the other arch rib 26b shown in FIG. L2 is shifted and set to have a width D, that is, approximately one rib width. With such a configuration, when a wheel load accompanying the traveling of the vehicle is applied to the expansion joint member 25, a couple force generated by an extra rotational moment, a torsional moment, or the like induced in the portion of the intermediate band 25a is generated. However, one arch rib 26a of the expansion joint member 25 compressively deforms in the right direction in the road width direction, that is, in the E direction, and the other arch rib 26b compresses in the left direction, that is, in the F direction.
[0020]
A desired number of the one and the other arch ribs 26a, 26b are arranged at a predetermined interval, respectively, for example, seven in FIG. As shown in FIG. 3B, the space between the one and the other arch ribs 26a and 26b has a predetermined width adjacent to the one and the other arch ribs 26a and 26b. , 26b are provided with waterproof membranes 26c, 26d having a predetermined depth from the top. As shown in FIG. 3B, the waterproof films 26c and 26d are adjacent to each other in width G, and slightly wider than the width H of the arch ribs 26a and 26b, and are formed in a thin shape.
Note that the present invention is not limited to this, and the width G of the waterproof films 26c and 26d may be set smaller than the width H of the arch ribs 26a and 26b.
[0021]
The expansion joint member 25 is divided into a front portion 25b and a rear portion 25c when the intermediate band 25a is defined as a center portion. As shown in FIG. 2, stepped concave portions 26e and 26f are formed on the lower surfaces of the arch ribs 26a and 26b formed at the left ends of the front portion 25b and the rear portion 25c, respectively. Also, step-like convex portions 26g and 26h are formed on the upper surfaces of the right ends of the front portion 25b and the rear portion 25c, respectively.
Thus, the expansion joint member 25 shown in FIG. 2 is configured as a single block body. In order to install the expansion joint member 25 on the road, the single block body is moved to each other, that is, to the left and right in accordance with the length in the width direction of the road. What is necessary is just to connect continuously. At this time, the concave portions 26e and 26f at the left end or the convex portions 26g and 26h at the right end of the front and rear portions 25b and 25c as one block body are sequentially engaged with the convex portions or recesses of the next block body. It can be connected simply and quickly without the need for special fasteners or members.
As described above, there is a feature that the combination can be appropriately performed according to the width of the road.
[0022]
At the front end of the front portion 25b of the expansion joint member 25, that is, the front wall portion, a desired number of two anchor bars 27a and 27b for the expansion joint member in the example of FIG. Also have expansion joint member anchor bars 28a, 28b. That is, as shown in FIG. 3 (a), the distal ends 27c, 27c, 28c, 28c of the anchor bars 27a, 27b, 28a, 28b for the expansion joint member are fixed to the expansion joint member 25 in advance by stud welding. .
It is also possible to embed a steel plate or the like having female female threads inside the front and rear of the expansion joint member 25, and fix it in advance by screwing a threaded portion into the steel plate.
[0023]
As shown in FIG. 1 and FIG. 3A, the bottom surface of the expansion joint member 25 has a shape formed by connecting two semicircular shapes 25d and 25e as viewed from the side. The semicircular shapes 25d and 25e are formed by through holes 25g and 25h, respectively. The semicircular 25d through hole 25g is formed on the bottom surface of the front portion 25b of the expansion joint member 25 by the bottom surface of the rear portion 25c. Each of the through holes 25h has a semicircular shape 25e and extends in the width direction of the road. In addition, a desired number of small grooves 25f, 25f, 25f, 25f are formed in the front and rear portions adjacent to the semicircular shapes 25d, 25e in the width direction of the road in the same manner as the through holes 25g, 25h.
As described above, the bottom surface of the expansion joint member 25 is not formed as a whole as a whole by forming the through holes 25g, 25h and the small grooves 25f, 25f, 25f, 25f of the semicircular shapes 25d, 25e, and thus the road surface is not formed as a whole. When mounted on the upper surface, the entire surface and the entire area thereof do not contact a load support plate described later.
[0024]
Reference numeral 29 denotes a load supporting plate, which is constituted by a combination of two individual load supporting plates, each of which has a substantially L-shaped cross-sectional shape and is formed of various steel materials. The load support plate 29 includes brackets 29a and 29b having a substantially V-shaped support frame below, and between one of the backfill members 30, 31 or between one of the floor slabs 32, 33 including a parapet. It is interposed in. Reference numerals 40 and 41 denote the other pavement members, which are arranged adjacent to the backfill members 30 and 31 and laid on the surfaces of the floor slabs 32 and 33. The load support plate 29 is a desired number to be inserted into the expansion joint member anchor bars 27a, 27b and 28a, 28b at predetermined locations in the width direction of the road on the front side surface portion 29c and the rear side surface portion 29d. The same number of anchor bar insertion holes 29e, 29e, 29f, 29f as the number of joint member anchor bars are provided so as to pass therethrough. The inner surface of each load support plate of the load support plate 29 has, for example, a tooth-shaped bottom portion, and these are arranged to face each other. The method of fitting the expansion joint member 25 to the inner surface of the load supporting plate 29 is performed by inserting the expansion joint member anchor bars 27a, 27b and 28a, 28b into the anchor bar fitting insertion holes 29e, 29e, 29f, 29f. The load support plate 29 composed of two pieces is pushed in from the side, and the expansion joint member 25 is fitted and fixed.
[0025]
It should be noted that the expansion joint member 25 is formed with a screw hole or the like or a steel plate at the front wall surface portion and the rear wall surface portion of the expansion joint member, and the expansion joint member 25 is provided with the expansion joint member anchor bars 27a to 28b in advance. After the expansion joint member 25 is inserted into the inner surface of the load support plate 29, the anchor bars 27a, 27b, 28a, 28b for the expansion joint members are connected to the outer side of both side surfaces 29c, 29d of the load support plate 29. A method may be used in which the holes are inserted into the fitting holes 29e, 29e, 29f, and 29f, and are fixed to the screw holes of the expansion joint member.
[0026]
Numerals 34 and 35 denote a desired number of countersunk bolts, which are inserted into countersunk bolt insertion holes 34a and 35a provided at predetermined locations in the width direction of the road at the front and rear side portions 29c and 29d of the load support plate 29. Screw in the parts 29c and 29d from outside. The tips of the countersunk bolts 34 and 35 are screwed into countersunk bolt insertion holes 34a and 35a, and then screwed and fixed to the front and rear wall portions of the expansion joint member 25. With this configuration, the expansion joint member 25 is firmly fixed on the inner surface of the load support plate 29, and the bridge expansion joint is designed to withstand various wheel loads on the road. The positions of the countersunk bolt insertion holes 34a, 35a are set to different positions from the anchor bar fitting insertion holes 29e, 29e, 29f, 29f.
[0027]
Further, a desired number of anchor bars 36, 37 for load support plates are provided on the outer surfaces of the front and rear side surface portions 29c, 29d of the load support plate 29. The load supporting plate anchor bars 36 and 37 are so-called deformed bar studs, which are formed in a substantially L-shape toward the tip thereof, rather than the expansion joint member anchor bars 27a to 28b. It is designed to be long. The load supporting plate anchor bars 36, 37 are in the width direction of the road, and when the expansion joint member anchor bars 27a to 28b are installed in the backfill members 30, 31, the expansion joint member anchor bars are provided. 27a-28b.
[0028]
The load supporting plate anchor bars 36, 37 are in contact with the substantially U-shaped anchor reinforcing bars 36a, 37a incorporated in the floor slabs 32, 33, and the load supporting plate anchor bars 36, 37 are connected to the road. In combination with a large number of reinforcing steel bars 38, 39 stretched in the width direction, the connectivity between the floor slabs 32, 33 and the backfill members 30, 31 is enhanced, and the backfill members 30, 31 themselves are reinforced. The division is being strengthened.
[0029]
In the drawing, reference numeral 42 denotes a waterproof sheet, which is interposed between the bottom surface of the expansion joint member 25 and the inner surface of the load supporting plate 29 and extends in the width direction of the road. The waterproof sheet 42 prevents entry of rainwater and dust generated as the vehicle travels on the road.
Note that the structure of the bridge expansion joint according to the present invention is originally a structure having an enhanced waterproof effect, so that the waterproof sheet 42 does not necessarily need to be provided for implementation.
Reference numeral 43 denotes a joint play between the other floor slabs 32 and 33.
[0030]
Next, a procedure for assembling a bridge expansion joint to a road in an embodiment of the present invention and an operation thereof will be described.
[0031]
First, the load supporting plate 29 provided with the expansion joint member 25 and the anchor bars 36 and 37 for the load supporting plate is manufactured at a factory other than the road construction site, for example. Then, during construction at the site, the expansion joint member 25 and the load support plate 29 are transported. At the site, U-shaped anchor rebars 36a, 37a and the like are deployed, while the other floor slabs 32, 33 are constructed, and the load support plate 29 is installed between the floor slabs 32, 33 and above. At the same time, after the expansion joint member 25 is fitted to the upper surface or the inner surface of the load support plate 29, for example, a concrete member and the other backfill members 30 and 31 are cast and completed. Then, the one pavement member 40 and the other pavement member 41 are laid on the back slabs 32 and 33 so as to be flush with and adjacent to the backfill members 30 and 31.
[0032]
The expansion joint member 25 has the expansion joint member anchor bars 27a, 27b, 28a, and 28b fixed in advance as described above, and the load support plate is fixed to the expansion joint member anchor bars 27a and 27b. 29, the anchor bar fitting insertion holes 29e, 29e of one of the front side surface portions 29c are inserted. Then, the other side of the load supporting plate 29 is inserted into the expansion support member anchor bars 28a, 28b. After the anchor bar fitting insertion holes 29f, 29f are inserted, the load supporting plate 29 is pushed into the front and rear portions 25b, 25c of the expansion joint member 25 from the side, so that the expansion joint member 25 is easily and quickly inserted. It can be fitted and fixed to the load support plate 29.
The expansion joint member anchor bars 27a, 27b, 28a, 28b are retrofitted by inserting the anchor bar insertion holes 29e, 29e, 29f, 29f from outside the side surfaces 29c, 29d of the load support plate 29. It is also possible.
[0033]
The structure of the bridge expansion joint according to the present invention is constructed on various roads, and the expansion joint member 25 is compressed in the I direction and the J direction shown in FIG. Perform a tensile action.
Thus, on the other hand, the arch rib 26a and the front portion 25b formed on the surface of the front portion 25b of the expansion joint member 25 are deformed in the arch direction, that is, in the E direction (rightward direction). On the other hand, the arch rib 26b and the rear portion 25c formed on the surface of the rear portion 25c of the expansion joint member 25 are deformed in the arch direction, that is, in the F direction (left direction). This amount of deformation is dispersed by the two arch ribs, and according to the experimental results, the expansion joint member 25 is reduced to two without using the substantially S-shaped rib having both the ribs 26a and 26b as in the present invention. Without defining, the amount of deformation is reduced by half as compared with the case where only one rib is used, and the space for expanding and contracting the rib of the ground covering portion can be set small. The width of the road in the direction of the road can be shortened.
[0034]
Further, when the expansion joint member 25 is deformed in the E and F directions as described above, the position of the rear end 26a1 of one arch rib and the position of the front end 26b1 of the other arch rib are shifted, for example, the width of one rib. Since the offset is set differently, couples such as a rotational moment, a bending moment, and a torsional moment do not act on the intermediate band 25a, and both the arch ribs 26a and 26b are displaced in parallel in the right and left directions, respectively, and in the I direction and the left direction. The compression / tensile action in the J direction is also smoothly allowed, and the expansion / contraction action and the girder rotational moment due to the difference in the outside air temperature applied to the expansion joint member 25 can be absorbed.
Thus, the bottom surface portion has through-holes 25g and 25h having a shape in which two substantially semicircular shapes 25d and 25e are connected in cross section, and the entire surface and the entire area thereof come into contact with the load support plate 29. However, the compressive load is dispersed by the through holes 25g and 25h, and the portion in contact with the waterproof sheet 42 and the load supporting plate 29 becomes a part, and the contact area is reduced as much as possible. To improve the durability of the expansion joint member 25 and the like. In addition, the striking sound hitting the surface of the load supporting plate due to the wheel load applied to the expansion joint member 25 repeatedly is suppressed, the passing noise accompanying the vehicle running is greatly reduced, and the bottom surface of the expansion joint member 25 is prevented from being worn.
According to the experimental results, the compressive load applied to the load support plate 29 is reduced by about 30% compared to a configuration in which the entire bottom surface and the entire area of the expansion joint member 25 are brought into contact with the surface of the load support plate 29. Was completed.
[0035]
Further, with the deformation of the expansion joint member 25 in the left and right directions, in addition to the configuration of the bottom portion of the expansion joint member 25, as shown in FIGS. 2 and 3B, one and the other arch ribs 26a, Waterproof membranes 26c and 26d are formed adjacent to 26b, and small grooves 25f are formed before and after the through holes 25g and 25h on the bottom surface of the expansion joint member 25, so that they are similarly deformed. The intermediate band 25a is interposed at the center of the expansion joint member 25 to reduce the amount of deformation of the waterproof films 26c and 26d, so that the bottom surface of the expansion joint member 25 rises from the surface of the load support plate 29. In addition to preventing the phenomenon, the connection between the one arch rib 26a and the other arch rib 26b of the expansion joint member 25 is maintained, the separation phenomenon and deformation are prevented, and the durability of the expansion member 25 is improved. Thus, the passing noise generated due to the wheel load could be further reduced.
[0036]
When the expansion joint member 25 is fitted and fixed to the load support plate 29, countersunk bolts 34 and 35 are screwed into the load support plate 29 from the front side surface 29c and the rear side surface 29d. The members 25 are connected, and the anchoring bars 27a, 27b, 28a, 28b for the expansion joint members and the anchor bars 36, 37 for the load supporting plates provided on the expansion joint member 25 are driven into the backfill members 30, 31. Since it is fixed inside the backfill members 30 and 31 in accordance with the process, an excessive wheel load is applied to the expansion joint member 25, and even if a bending action is applied to the expansion joint member 25, the front and rear of the expansion joint member 25 are not changed. There is no gap between the end face and one of the front and rear sides of the load support plate 29 and the other side face parts 29c and 29d, and the fitting and fixing state of the two is always stable without intrusion of rainwater or the like. .
[0037]
【The invention's effect】
Since the structure of the bridge expansion joint according to the present invention has the above-described configuration, operation, and the like, it has the following effects.
[0038]
According to the first aspect of the present invention, on the other hand, a load supporting plate having a substantially L-shaped cross section interposed between the other floor slabs, and an expansion joint fitted on the load supporting plate having a substantially L-shaped cross section. The expansion joint member is formed with a series of substantially S-shaped ribs having a predetermined width on the surface of the expansion joint member, and the cross section of the bottom surface of the expansion joint member has a shape in which two substantially semicircular shapes are connected. The present invention provides a structure of a bridge expansion joint characterized by the following.
With such a configuration, the wheel load accompanying the vehicle passing through the road is dispersed to the left or right to reduce the amount of deformation of the expansion joint member and the substantially S-shaped rib, and to expand and contract the ground cover. The use space can be set small, preventing the water leakage phenomenon caused by the accumulation of rainwater and dust, and also has the effect of greatly reducing the passing noise caused by running the vehicle.
In addition, two substantially semicircular shapes are formed on the bottom surface of the expansion joint member to reduce the contact area on the load support plate, and the semicircular through-hole extends in the width direction of the road. Since the compression load applied to the expansion joint member is dispersed, and the load applied to the load supporting plate is set extremely low, the setting of the compression load during construction is facilitated, and the molding material for the expansion joint member is formed. There is an effect of providing a technology with high mass productivity, which reduces the noise and prevents the phenomenon of floating and further reduces the passing noise generated when the vehicle passes.
[0039]
According to the invention described in claim 2, one pavement member laminated on one floor slab, the other pavement member laminated on the other floor slab, and the one and the other pavement member are adjacent to each other. The other backing member, a load supporting plate interposed between the one and the other backing members, and having a substantially L-shaped cross section, fitted on the load supporting plate having a substantially L-shaped cross section. The anchor bar for a desired number of expansion joint members is fixed back and forth, and a series of substantially S-shaped ribs of a predetermined width are formed in series on the surface, and a substantially semicircular cross section having two cross sections on the bottom surface. A bridge comprising an expansion joint member formed in a continuous shape, and a fitting hole through which the anchor bar for the expansion joint member is inserted is formed in a side surface of the load support plate having a substantially L-shaped cross section. An expansion joint structure is provided.
With such a configuration, in addition to the effect of claim 1, it is not necessary to fix the expansion joint member on the load supporting plate using a hexagon bolt or various bolts, and the number of parts such as the bolts is reduced. Since there are no bolts and the like, there is no drop or damage of the expansion joint member from the load support plate, and a high-quality bridge expansion joint structure can be provided, and the expansion joint member is fitted on the load support plate. There is an effect that the fixing step can be performed very simply and quickly.
[0040]
According to the invention described in claim 3, one pavement member laminated on one floor slab, the other pavement member laminated on the other floor slab, and one pavement member adjacent to the one and the other pavement member And the other backing member, and a load supporting plate having a substantially L-shaped cross-section, interposed between the one and the other backing members and having a desired number of anchor bars for load supporting plates fixed in front and back. And a predetermined number of expansion joint member anchor bars are fixed back and forth and a series of substantially S-shaped ribs of a predetermined width are fixed on the load support plate having a substantially L-shaped cross section. An expansion joint member formed on the bottom surface and having a shape formed by connecting two substantially semi-circular sections on the bottom surface, and an anchor for the expansion joint member on a side surface of the load support plate having a substantially L-shaped cross section. Provided is a structure of a bridge expansion joint, wherein a fitting insertion hole through which a bar is inserted is formed.
With this configuration, in addition to the effects of the first and second aspects of the present invention, the anchor bar for the expansion joint member and the anchor bar for the load support plate provided on the expansion joint member 25 are cast into the backing member. In accordance with the process, since it is fixed in the backfill member, even if an excessive expansion or contraction action or rotation of the girder due to a difference in outside air temperature is applied to the expansion joint member, the expansion joint member and the load supporting plate are applied. There is no gap and there is no intrusion of rainwater or the like, and the fitting state between the two is always tight, and there is an effect of improving the durability of the expansion joint member or the bridge expansion joint.
[0041]
According to the invention as set forth in claim 4, one pavement member laminated on one floor slab, the other pavement member laminated on the other floor slab, and the one and the other pavement member are adjacent to each other. And the other backing member, and a load supporting plate having a substantially L-shaped cross-section, interposed between the one and the other backing members and having a desired number of anchor bars for load supporting plates fixed in front and back. And a fixed number of anchor bars for expansion joint members are fixed back and forth, and a substantially S-shaped rib having a predetermined width is sequentially formed on the surface. An expansion joint member formed on the bottom surface and having a shape formed by connecting two substantially semi-circular sections on the bottom surface, and an anchor for the expansion joint member on a side surface of the load support plate having a substantially L-shaped cross section. Insert the desired number of fitting holes through which the bar is inserted, and insert the desired number of countersunk bolts at a different position from the fitting holes Is formed and to provide a structure of the bridge expansion joint 該荷 heavy support plate characterized by being fixedly fitted to the expansion joint member in the flat head bolt.
With such a configuration, in addition to the effects of the inventions according to claims 1 to 3, the expansion joint member is fixed with a desired number of countersunk bolts from the side surface of the load support plate. The degree of adhesion to the plate is increased, the durability of the expansion joint member or the bridge expansion joint concerned is maintained, and at the same time, the water leakage phenomenon is completely prevented, and the expansion action and the rotation of the girder due to the difference in outside air temperature are absorbed. It has the effect of withstanding large wheel loads.
[0042]
According to the fifth aspect of the present invention, a step-shaped convex portion or a concave portion is formed on an upper surface or a lower surface at a left end or a right end of the expansion joint member. 4. A structure of a bridge expansion joint according to item 4.
With such a configuration, in addition to the effects of the inventions according to claims 1 to 4, for example, the expansion joint member is configured to have a width of about 1800 (mm) as one block body, and is suitable for a road width to be constructed. Accordingly, by arranging a large number of solids sequentially, it can be set in accordance with the road condition, and if there is a damaged part after use, replace only the block body that needs repair and repair it There is an effect that enables.
[0043]
According to the sixth aspect of the present invention, there is provided the structure of the bridge expansion joint according to any one of the first, second, third and fourth aspects, wherein a small groove is formed along a lower left and right direction of the expansion joint member. .
With such a configuration, in addition to the effects of the first to fourth aspects of the present invention, the compression load applied to the expansion joint member is further dispersed, and the phenomenon of floating from the load supporting plate of the expansion joint member is prevented to prevent the expansion joint member. Further, there is an effect that the passing noise accompanying the passing of the vehicle on the road is greatly reduced.
[0044]
According to the invention described in claim 7, the expansion joint member is formed of one or more compositions of high-purity chloroprene rubber, natural rubber, recycled rubber, and high-damping rubber. The structure of the bridge expansion joint according to 2, 3, or 4 is provided.
With such a configuration, in addition to the effects of the inventions according to claims 1 to 4, the expansion joint member is made of general-purpose expansion rubber, so that there is an effect of providing an expansion joint member having high workability and mass productivity.
[0045]
According to the invention as set forth in claim 8, in a configuration in which substantially S-shaped ribs having a predetermined width are formed in series on the surface of the expansion joint member, the substantially S-shaped ribs are separated substantially at the center in the front-rear direction, The bridge expansion joint structure according to claim 1, 2, 3, or 4, wherein the front rib end position and the rear rib end position are shifted left and right.
With such a configuration, in addition to the effects of the inventions according to claims 1 to 4, when expansion and contraction due to a difference in outside air temperature and rotation of the girder are applied to the expansion joint member, on the other hand, there is a rotational moment between the other arch ribs. The pressure load generated before and after the expansion joint member without generating a couple is skillfully dispersed in the parallel direction to the left and right sides of the expansion joint member, and compressed and tensioned to deform the expansion joint member. And has the effect of improving durability.
[Brief description of the drawings]
FIG. 1 is a vertical sectional view showing an embodiment of a structure of a bridge expansion joint according to the present invention.
FIG. 2 is an example of an embodiment of an expansion joint member according to the present invention, and is a plan view showing an external shape thereof.
3A and 3B show an example of an embodiment of an expansion joint member according to the present invention, wherein FIG. 3A is a side view as seen from the direction of arrows BB in FIG. 2, and FIG. 2 is a cross-sectional view as viewed from the direction of arrows CC in FIG.
4A and 4B are views showing a structure of a bridge expansion joint according to a first example of the related art, in which FIG. a) It is a top view.
FIG. 5 is a perspective view of a structure of a bridge expansion joint showing a second example in the prior art.
[Explanation of symbols]
1 elastic rubber
1a V-shaped groove
1b V-shaped groove
2 One floor slab
3 The other floor slab
4 One backfill member
5 The other backfill member
6 Joint Yuma
7 Load support plate
8 Base plate
8a Bolt insertion hole
9 Base plate
9a Bolt insertion hole
10 Hex bolt
11 Hex bolt
12, 13 nut
14 One anchor bolt
15 The other anchor bolt
16 One pavement member
17 The other pavement member
18, 19 Reinforcing bars
20, 21 Anchor reinforcement
22 Elastic rubber
22a steel plate
23 Support Block
23a Standing part of support block
23b Finger-shaped support plate of support block
23c flat head bolt
24 Support Block
24a Support block standing part
24b Finger-shaped support plate of support block
24c flat head bolt
25 Expansion joint members
25a Intermediate band of expansion joint member
25b Front part of expansion joint member
25c Rear part of expansion joint member
25d, 25e semicircular
25f small groove
25g, 25h Through hole
26 S-shaped rib
26a One arch rib
26a1 Rear end of one arch rib
26b The other arch rib
26b1 Front end of the other arch rib
26c, 26d waterproof membrane
26e, 26f Stepped recess
26g, 26h Step-shaped protrusion
27a, 27b Anchor bar for expansion joint member
28a, 28b Anchor bar for expansion joint member
27c, 28c Tip of anchor bar for expansion joint member
29 Load support plate
29a, 29b Bracket
29c Front side of load support plate
29d Back side of load support plate
29e, 29f Anchor bar insertion hole
30 One backing member
31 The other backfill member
32 One floor slab
33 The other floor slab
34 countersunk bolt
34a Countersunk bolt insertion hole
35 Countersunk bolt
35a Countersunk bolt insertion hole
36, 37 Anchor bar for load support plate
36a, 37a U-shaped anchor rebar
38, 39 Reinforcing bars
40 One paving member
41 The other pavement member
42 tarpaulin
D Offset width of one and other arch ribs
E Deformation direction of one arch rib (rightward direction)
F Deformation direction of the other arch rib (left direction)
G Width of waterproofing membrane
H On the other hand, the width of the other arch rib
I Direction of compression action of front part
J Direction of compression action of rear part

Claims

On the other hand, the load supporting plate has a substantially L-shaped cross section interposed between the other floor slabs, and an expansion joint member fitted on the load supporting plate having a substantially L-shaped cross section. A bridge expansion joint comprising a series of substantially S-shaped ribs having a predetermined width formed on a surface thereof and a cross section of a bottom portion of the expansion joint member formed by connecting two substantially semicircular shapes. Construction.

One pavement member laminated on one floor slab, another pavement member laminated on the other floor slab, and one and the other backfill member formed adjacent to the one and the other pavement member And a load support plate interposed between the one and the other back-filling members and having a substantially L-shaped cross section and fitted on the load support plate having a substantially L-shaped cross section. An expansion joint having an anchor bar for an expansion joint member fixed thereto, a series of substantially S-shaped ribs having a predetermined width formed on a surface thereof, and a cross section formed by connecting two substantially semicircular cross sections on a bottom surface. A structure of a bridge expansion joint, comprising a member, and a fitting hole for inserting the anchor bar for the expansion joint member for the expansion joint member is formed in a side surface of the load supporting plate having a substantially L-shaped cross section.

One pavement member laminated on one floor slab, another pavement member laminated on the other floor slab, and one and the other backfill member formed adjacent to the one and the other pavement member A load support plate interposed between the one and the other backfilling members and having a desired number of anchor bars for load support plates fixed in front and rear thereof, having a substantially L-shaped cross section; A fixed number of anchor bars for expansion joint members are fixed back and forth, a series of substantially S-shaped ribs having a predetermined width are formed on the surface, and a cross section is formed on the bottom surface. An expansion joint member having a shape formed by connecting three substantially semicircular shapes is provided, and a fitting insertion hole through which the anchor bar for the expansion joint member is inserted is formed in a side surface of the load support plate having a substantially L-shaped cross section. The structure of a bridge expansion joint characterized by the following.

One pavement member laminated on one floor slab, another pavement member laminated on the other floor slab, and one and the other backfill member formed adjacent to the one and the other pavement member A load support plate interposed between the one and the other backfilling members and having a desired number of anchor bars for load support plates fixed in front and rear thereof, having a substantially L-shaped cross section; A fixed number of anchor bars for expansion joint members are fixed back and forth, a series of substantially S-shaped ribs having a predetermined width are formed on the surface, and a cross section is formed on the bottom surface. A desired number of insertion holes, each having an expansion joint member having a shape formed by connecting two substantially semicircular shapes, and inserting the anchor bar for the expansion joint member into a side surface of the load support plate having a substantially L-shaped cross section. , And a desired number of countersunk bolt insertion holes are formed at positions different from the insertion holes, and the load support plate is Structure of bridge expansion joint, characterized in that the fitting fixed to the expansion joint member belt.

5. The structure of a bridge expansion joint according to claim 1, wherein a step-shaped projection or recess is formed on an upper surface or a lower surface at a left end portion or a right end portion of the expansion joint member.

The structure of a bridge expansion joint according to claim 1, wherein a small groove is formed along a lower left and right direction of the expansion joint member.

The bridge expansion and contraction according to claim 1, 2, 3, or 4, wherein the expansion joint member is formed of one or more compositions of high-purity chloroprene rubber, natural rubber, recycled rubber, and high attenuation rubber. Joint structure.

In a configuration in which a substantially S-shaped rib having a predetermined width is formed in a series on the surface of the expansion joint member, the substantially S-shaped rib is separated substantially at the center in the front-rear direction, and the front rib end position and the rear end are separated. 5. The structure of a bridge expansion joint according to claim 1, wherein the rib end portion is shifted left and right.