JP2015010397A

JP2015010397A - Cut-off material for joint gap

Info

Publication number: JP2015010397A
Application number: JP2013137107A
Authority: JP
Inventors: 翼近藤; Tasuku Kondo; 佳宏宮城; Yoshihiro Miyagi; 晃小坂; Akira Kosaka; 山内　寛; Hiroshi Yamauchi; 寛山内; 大志片島; Daishi Katashima
Original assignee: Nitta Corp; Asahi Kako Co Ltd
Current assignee: Nitta Corp; Asahi Kako Co Ltd
Priority date: 2013-06-28
Filing date: 2013-06-28
Publication date: 2015-01-19
Anticipated expiration: 2033-06-28
Also published as: JP6261893B2

Abstract

PROBLEM TO BE SOLVED: To provide a cut-off material for a joint gap that facilitates connecting operation, has superior follow-up characteristics to expansion and contraction of a bridge girder, and is sufficiently durable.SOLUTION: An expanding/contracting foam layer 22 extends along a joint gap of a road bridge and can expand and contract as the gap joint expands and contracts. Cut-off expanding/contracting foam 25 as a cut-off member is provided at an end of the expanding/contracting foam layer 22. An open cell rubber sponge as the cut-off member is provided on the front of the cut-off expanding/contracting foam 25. A cut-off sheet 31 is laminated on and bonded to upper surfaces of the expanding/contracting foam layer 22 and the cut-off expanding/contracting foam 25 and extends up to an upper surface of the open cell rubber sponge. Two expanding/contracting foam layers 22 are connected having open cell rubber sponges in contact with each other.

Description

本発明は、高速道路の道路橋等に設けられ、橋桁の伸縮を吸収するために設けられる遊間用止水材に関する。 The present invention relates to a water stop material for play that is provided on a highway bridge or the like and is provided to absorb expansion and contraction of a bridge girder.

道路橋は、設置場所の温度変化によって橋桁の長さが伸縮し、この伸縮を吸収するために道路橋には、その幅方向に延びる遊間が形成される。遊間において、路面には道路橋伸縮装置が設けられ、道路橋伸縮装置の下方には、橋桁の伸縮に伴う遊間の大きさの変化に追従しつつ雨水等の落下を防止する遊間用止水材が設けられる。 In the road bridge, the length of the bridge girder expands and contracts due to the temperature change of the installation location, and a gap extending in the width direction is formed in the road bridge in order to absorb this expansion and contraction. In the play, a road bridge expansion / contraction device is provided on the road surface. Under the road bridge expansion / contraction device, a water stop material for play is used to prevent the fall of rainwater, etc. while following the change in the size of the play due to the expansion and contraction of the bridge girder. Is provided.

遊間用止水材は遊間の長手方向に連続して延びる一体物であるが、製造、運搬等の理由により、分割された状態で工事現場に運び込まれ、接続作業が行われる。遊間用止水材は、遊間に沿って延びる伸縮フォーム層と、この伸縮フォーム層の上面に接着される止水シート等から成り、工事現場における接続作業として、従来、突き合わせて配置された止水シートの端部に沿って、止水機能を有するシートが貼り付けられる、所謂パッチ貼り工法が知られている。しかしこのような接続作業は非常に困難であって熟練を要し、作業効率が低い。 The play-stop material is a single piece that continuously extends in the longitudinal direction of the play. However, the play-stop material is brought into the construction site in a divided state for the reasons of manufacture, transportation, and the like, and the connection work is performed. The water-stop material for play is composed of a stretchable foam layer extending along the play and a water-stop sheet adhered to the upper surface of the stretch foam layer. A so-called patch application method is known in which a sheet having a water stop function is attached along the edge of the sheet. However, such connection work is very difficult and requires skill, and the work efficiency is low.

そこで従来、特許文献１に開示されているように、突き合わされた２つの伸縮フォーム層の間に反応硬化性のある弾性体を流し込んで充填し、この弾性体が硬化することにより伸縮フォーム層を一体的に連結する工法が提案されている。 Therefore, conventionally, as disclosed in Patent Document 1, an elastic body having a reaction curable property is poured and filled between the two stretchable foam layers that are abutted together, and the elastic foam is cured to form the stretchable foam layer. A method of connecting them together has been proposed.

特開２００３−１２９４０６号公報Japanese Patent Laid-Open No. 2003-129406

しかし特許文献１の接続方法では、弾性体を撹拌したり、養生することが必要であり、面倒である。また硬化した弾性体は体積変化が非常に小さいため、橋桁の伸縮によって厚さが大きく変化し、接着面に作用する引張り力のために耐久性が不十分である。 However, in the connection method of Patent Document 1, it is necessary to stir or cure the elastic body, which is troublesome. In addition, since the volume change of the cured elastic body is very small, the thickness is greatly changed by the expansion and contraction of the bridge girder, and the durability is insufficient due to the tensile force acting on the bonding surface.

本発明は、接続作業が簡単であり、橋桁の伸縮に対する追従性に優れ、十分な耐久性を有する遊間用止水材を得ることを目的としている。 An object of the present invention is to obtain a water stoppage material for play that has a simple connection operation, excellent followability to expansion and contraction of a bridge girder, and sufficient durability.

本発明に係る第１の遊間用止水材は、道路橋の遊間に沿って延びるとともに遊間の変位に追随可能である第１および第２の伸縮フォーム層と、止水機能を有し、第１の伸縮フォーム層の端部に設けられる第１の止水性部材と、止水機能を有し、第２の伸縮フォーム層の端部に設けられる第２の止水性部材と、止水機能を有し、第１および第２の伸縮フォーム層の上面に設けられる第１および第２の止水シートとを備え、第１および第２の止水シートはそれぞれ第１および第２の止水性部材の上面まで延び、第１および第２の伸縮フォーム層は第１および第２の止水性部材同士を密着させて連結されることを特徴としている。 The first water stop material according to the present invention has a water stop function, the first and second stretchable foam layers that extend along the gap between the road bridges and can follow the displacement between the play, A first water-stop member provided at the end of one stretchable foam layer and a water-stop function, a second water-stop member provided at the end of the second stretchable foam layer, and a water-stop function And first and second waterproof sheets provided on the top surfaces of the first and second stretchable foam layers, the first and second waterproof sheets being first and second waterproof members, respectively. The first and second stretchable foam layers are connected to each other by bringing the first and second water-stopping members into close contact with each other.

好ましくは第１および第２の止水性部材はそれぞれ、連通多孔質の第１および第２の止水性伸縮フォームを有する。第１および第２の止水性部材がさらに、第１および第２の止水性伸縮フォームの前面に設けられ、橋軸の方向および遊間の長手方向の両方に伸縮性を有する第１および第２の発泡体を有してもよい。この場合、第１および第２の止水シートはそれぞれ、第１および第２の止水性伸縮フォームの前面よりも突出して第１および第２の発泡体の上面まで延び、第１および第２の発泡体が圧縮した状態で接することが好ましい。 Preferably, the first and second water-stop members each have a communicating porous first and second water-proof stretchable foam. The first and second water-stop members are further provided on the front surfaces of the first and second water-proof stretch foams, and have first and second stretch properties both in the direction of the bridge axis and in the longitudinal direction between the play. You may have a foam. In this case, the first and second water-stop sheets protrude from the front surfaces of the first and second water-proof stretchable foams and extend to the top surfaces of the first and second foams, respectively. It is preferable that the foam contacts with the compressed state.

第１および第２の止水性伸縮フォームはそれぞれ、相対的に低い弾性を有する軟質止水性フォームと相対的に高い弾性を有する硬質止水性フォームとを遊間の幅方向に交互に配設するとともに接着して構成されるものであってもよい。 Each of the first and second water-stopping stretchable foams is formed by alternately arranging a soft water-proof foam having a relatively low elasticity and a hard water-proof foam having a relatively high elasticity in the width direction of the play and bonding them. It may be configured as follows.

第１および第２の止水性部材がそれぞれ、橋軸の方向および遊間の長手方向の両方に伸縮性を有する第１および第２の発泡体であってもよい。この場合、第１および第２の止水シートはそれぞれ、第１および第２の発泡体の端面まで延び、相互に近接することが好ましい。あるいは、第１および第２の止水シートはそれぞれ、第１および第２の伸縮フォーム層の端面において第１および第２の伸縮フォーム層の少なくとも厚さ方向に折曲し、第１および第２の発泡体の裏面の全体に密着してもよい。 The first and second water-stop members may be first and second foams having stretchability both in the direction of the bridge axis and in the longitudinal direction between the play. In this case, it is preferable that the first and second waterproof sheets extend to the end surfaces of the first and second foams, respectively, and are close to each other. Alternatively, the first and second waterproof sheets are bent in the thickness direction of at least the first and second stretch foam layers at the end surfaces of the first and second stretch foam layers, respectively. You may adhere to the whole back surface of the foam.

本発明に係る第２の遊間用止水材は、遊間に沿って延びるとともに遊間の変位に追随可能であり、止水機能を有する第１および第２の伸縮フォーム層と、止水機能を有し、第１および第２の伸縮フォーム層の上面に設けられる第１および第２の止水シートとを備え、第１および第２の伸縮フォーム層は端部同士を密着させて連結されることを特徴としている。 The second waterstop material for play according to the present invention extends along the play and can follow displacement between the play, and has first and second stretchable foam layers having a water stop function and a water stop function. And the first and second waterproofing sheets provided on the top surfaces of the first and second stretchable foam layers, and the first and second stretchable foam layers are connected with their ends in close contact with each other. It is characterized by.

本発明に係る第３の遊間用止水材は、遊間に沿って延びるとともに遊間の変位に追随可能である第１および第２の伸縮フォーム層と、止水機能を有し、第１および第２の伸縮フォーム層の少なくとも一方の端部に設けられる止水性部材と、止水機能を有し、第１および第２の伸縮フォーム層の上面に設けられる第１および第２の止水シートとを備え、第１および第２の止水シートはそれぞれ止水性部材の上面まで延び、第１および第２の伸縮フォーム層は止水性部材を介して連結されることを特徴としている。 The third waterstop material for play according to the present invention has first and second stretch foam layers extending along the play and capable of following displacement between the play, and a water stop function. A water-stopping member provided at at least one end of the two stretchable foam layers, and a first and second waterstop sheet having a waterstop function and provided on the top surfaces of the first and second stretchable foam layers The first and second waterproof sheets extend to the upper surface of the water-stopping member, respectively, and the first and second stretchable foam layers are connected via the water-stopping member.

本発明に係る道路橋伸縮装置は、道路橋の遊間に沿って延びるフェースプレートと、フェースプレートの下方に設けられ、遊間に沿って延びるとともに遊間の変位に追随可能である第１および第２の伸縮フォーム層と、止水機能を有し、第１の伸縮フォーム層の端部に設けられる第１の止水性部材と、止水機能を有し、第２の伸縮フォーム層の端部に設けられる第２の止水性部材と、止水機能を有し、第１および第２の伸縮フォーム層の上面に設けられる第１および第２の止水シートとを備え、第１および第２の止水シートはそれぞれ第１および第２の止水性部材の上面まで延び、第１および第２の伸縮フォーム層は第１および第２の止水性部材同士を密着させて連結されることを特徴としている。 The road bridge expansion and contraction device according to the present invention includes a face plate extending along the gap between the road bridges, a first plate and a second plate provided below the face plate, extending along the gap and capable of following the displacement between the gaps. A stretchable foam layer, having a waterstop function, a first waterstop member provided at an end of the first stretchable foam layer, and having a waterstop function, provided at an end of the second stretchable foam layer A first water stop member, and a first water stop sheet having a water stop function and provided on the upper surfaces of the first and second stretchable foam layers. The water sheets extend to the top surfaces of the first and second water-stopping members, respectively, and the first and second stretchable foam layers are connected with the first and second water-stopping members in close contact with each other. .

本発明によれば、接続作業が簡単であり、橋桁の伸縮に対する追従性に優れ、十分な耐久性を有する遊間用止水材、およびこの遊間用止水材を用いた道路橋伸縮装置を得ることができる。 According to the present invention, it is possible to obtain a waterproofing material for play with a simple connection work, excellent followability with respect to expansion and contraction of a bridge girder, and sufficient durability, and a road bridge expansion and contraction device using the waterproofing material for play. be able to.

本発明の第１の実施形態である遊間用止水材を備えた道路橋継目部の概略的な構造を示す斜視図である。It is a perspective view which shows the schematic structure of the road bridge joint part provided with the water stop material for play which is the 1st Embodiment of this invention. 第１の実施形態の遊間用止水材の構成の一部を、上下を反転させて示す斜視図である。It is a perspective view which shows a part of structure of the water stop material for play of 1st Embodiment upside down. 止水性伸縮フォームの前面に連泡ゴムスポンジ層が設けられた状態を示す側面図である。It is a side view which shows the state by which the open-cell rubber sponge layer was provided in the front surface of the water-stop expansion-contraction foam. 連泡ゴムスポンジ層が当接するようにして２つの伸縮フォーム層が配置された状態を示す側面図である。It is a side view which shows the state by which two elastic foam layers were arrange | positioned so that a continuous foam rubber sponge layer may contact | abut. 連泡ゴムスポンジ層を圧縮させて２つの伸縮フォーム層が変位される状態を示す側面図である。It is a side view which shows the state by which a foamed foam sponge layer is compressed and two elastic foam layers are displaced. 第２の実施形態の概略的な構成を示す斜視図である。It is a perspective view which shows the schematic structure of 2nd Embodiment. 第３の実施形態の概略的な構成を示す斜視図である。It is a perspective view which shows the schematic structure of 3rd Embodiment. 第４の実施形態の伸縮フォーム層を示す断面図である。It is sectional drawing which shows the expansion-contraction foam layer of 4th Embodiment.

以下、図面を参照して本発明の第１の実施形態である遊間用止水材の構成を説明する。
図１は本発明の第１の実施形態である遊間用止水材を備えた道路橋の継目部の概略的な構造を示している。図１に示されるように、道路橋の橋軸Ｘに交差する方向に延びる遊間には、橋桁の伸縮を吸収するためにフェースプレート１０と遊間用止水材２０が設けられる。遊間用止水材２０はフェースプレート１０の下方であってウェブプレート３０、３０の遊間内に設けられ、雨水を止水するとともに遊間の拡縮動作に追従して伸縮する。 Hereinafter, with reference to drawings, the structure of the water stop material for play which is the 1st Embodiment of this invention is demonstrated.
FIG. 1 shows a schematic structure of a joint portion of a road bridge provided with a waterstop material for play according to the first embodiment of the present invention. As shown in FIG. 1, a face plate 10 and a play-stop material 20 are provided between the play extending in the direction crossing the bridge axis X of the road bridge in order to absorb the expansion and contraction of the bridge girder. The play-stop material 20 is provided below the face plate 10 and in the play between the web plates 30, 30, and stops and stops the rainwater and expands and contracts following the expansion / contraction operation of the play.

図２は遊間用止水材２０の構成の一部であり、上下を反転させて示している。遊間用止水材２０の両側に設けられる支柱スポンジ２１は、遊間の長手方向（図２の左右方向）に沿って延び、橋桁等の壁面に固定される。各支柱スポンジ２１の間には伸縮フォーム層２２が設けられる。伸縮フォーム層２２は、遊間に沿って延びるとともに遊間の拡縮動作に応じて幅方向に伸縮可能であり、相対的に低い弾性を有する軟質伸縮フォーム２３と相対的に高い弾性を有する硬質伸縮フォーム２４とを有する。軟質伸縮フォーム２３と硬質伸縮フォーム２４は伸縮フォーム層２２の幅方向に交互に配置され、隣接するもの同士は接着剤によって接着される。 FIG. 2 shows a part of the structure of the gap water-stopping material 20 and is shown upside down. The column sponges 21 provided on both sides of the play-stop material 20 extend along the longitudinal direction (left-right direction in FIG. 2) of the play and are fixed to a wall surface such as a bridge girder. A stretchable foam layer 22 is provided between the support sponges 21. The stretchable foam layer 22 extends along the gap and can be stretched in the width direction according to the expansion / contraction operation between the gaps, and the soft stretchable foam 23 having relatively low elasticity and the hard stretchable foam 24 having relatively high elasticity. And have. The soft stretchable foam 23 and the hard stretchable foam 24 are alternately arranged in the width direction of the stretchable foam layer 22, and the adjacent ones are bonded together with an adhesive.

伸縮フォーム層２２の端部には、止水機能を有する連通多孔質の止水性吸水ゲル化フォームである止水性伸縮フォーム２５が設けられる。止水性伸縮フォーム２５の遊間の長手方向の寸法Ｄ１は例えば５０〜７０mmである。止水性伸縮フォーム２５は、相対的に低い弾性を有する軟質止水性フォーム２６と、相対的に高い弾性を有する硬質止水性フォーム２７とを、伸縮フォーム層２２の幅方向に交互に配設するとともに接着して構成される。すなわち止水性伸縮フォーム２５は、伸縮フォーム層２２の端部以外の部分（符号Ａ）を構成する軟質伸縮フォーム２３および硬質伸縮フォーム２４と類似した構成を有するが、止水機能を有する点が異なる。 At the end of the stretchable foam layer 22, a waterstop stretchable foam 25, which is a continuous porous watertight water-absorbing gelled foam having a waterstop function, is provided. The dimension D1 in the longitudinal direction between the play of the water-stopping elastic foam 25 is, for example, 50 to 70 mm. The water-stopping elastic foam 25 includes a soft water-proofing foam 26 having a relatively low elasticity and a hard water-proofing foam 27 having a relatively high elasticity alternately arranged in the width direction of the elastic foam layer 22. Constructed by bonding. That is, the water-stopping stretchable foam 25 has a configuration similar to the soft stretchable foam 23 and the hard stretchable foam 24 constituting the portion other than the end of the stretchable foam layer 22 (symbol A), but is different in that it has a waterstop function. .

伸縮フォーム層２２と支柱スポンジ２１と止水性伸縮フォーム２５の上面（図２では下側の面）には、止水機能を有する止水シート３１が積層されて接着され、止水シート３１の上面には防塵フォーム３２が積層接着される。止水シート３１と防塵フォーム３２は止水性伸縮フォーム２５の端面よりも前方に突出し、その突出量Ｄ２は例えば５〜１０mmである。止水性伸縮フォーム２５の前面には、図３に示されるように連泡ゴムスポンジ層（発泡体）２８が設けられ、接着される。連泡ゴムスポンジ層２８は伸縮フォーム層２２の幅方向（図３において紙面に垂直な方向）に延び、連泡ゴムスポンジ層２８の両端面は、隣接する支柱スポンジ２１の外面と同じ平面を形成する。連泡ゴムスポンジ層２８は止水シート３１と防塵フォーム３２の先端よりも突出し、その突出量Ｄ３は例えば１５〜２０mmである。換言すれば、止水シート３１と防塵フォーム３２は連泡ゴムスポンジ層２８の上面の中央付近まで延びる。 A waterproof sheet 31 having a waterproof function is laminated and bonded to the upper surface (lower surface in FIG. 2) of the stretchable foam layer 22, the support sponge 21, and the waterproofing elastic foam 25. A dust-proof foam 32 is laminated and adhered to. The waterstop sheet 31 and the dustproof foam 32 protrude forward from the end face of the waterstop elastic foam 25, and the protrusion amount D2 is, for example, 5 to 10 mm. As shown in FIG. 3, a continuous foam rubber sponge layer (foam) 28 is provided on the front surface of the water-stopping elastic foam 25 and bonded thereto. The open-cell rubber sponge layer 28 extends in the width direction of the stretchable foam layer 22 (direction perpendicular to the paper surface in FIG. 3), and both end surfaces of the open-cell rubber sponge layer 28 form the same plane as the outer surface of the adjacent support sponge 21. To do. The open-cell rubber sponge layer 28 protrudes from the water-proof sheet 31 and the tip of the dust-proof foam 32, and the protrusion amount D3 is, for example, 15 to 20 mm. In other words, the water-stop sheet 31 and the dust-proof foam 32 extend to the vicinity of the center of the upper surface of the open-cell rubber sponge layer 28.

連泡ゴムスポンジ層２８は道路橋の橋軸の方向および遊間の長手方向の両方に伸縮性を有する。連泡ゴムスポンジ層２８は５０％以上圧縮した状態において止水機能を発揮し、圧縮性と伸張率がともに高い。道路橋の工事現場ではまず、図４に示されるように２つの伸縮フォーム層２２は、連泡ゴムスポンジ層２８が当接するようにして配置される。次に、図５に示されるように２つの伸縮フォーム層２２は、これらの上面に設けられた止水シート３１が当接するか、ほとんど当接するまで連泡ゴムスポンジ層２８を圧縮させて変位される。２つの伸縮フォーム層２２の接続作業が完了したとき、隣接する２つの止水シート３１は連泡ゴムスポンジ層２８が圧縮した状態で近接あるいは当接する。 The open-cell rubber sponge layer 28 has stretchability both in the direction of the bridge axis of the road bridge and in the longitudinal direction of the play. The open-cell rubber sponge layer 28 exhibits a water-stop function when compressed by 50% or more, and has both high compressibility and elongation. At the construction site of the road bridge, first, as shown in FIG. 4, the two stretchable foam layers 22 are arranged so that the open-cell rubber sponge layer 28 contacts. Next, as shown in FIG. 5, the two stretchable foam layers 22 are displaced by compressing the open-cell rubber sponge layer 28 until the water-stop sheet 31 provided on the upper surface abuts or almost abuts. The When the connection work of the two stretchable foam layers 22 is completed, the two adjacent water-stop sheets 31 come close to each other or come into contact with each other in a state where the open-cell rubber sponge layer 28 is compressed.

止水性伸縮フォーム２５を構成する軟質止水性フォーム２６と硬質止水性フォーム２７は、例えば旭化工株式会社製の型番CS#8137,ER#8137の止水性フォームを利用することができる。その特性は表１に示す通りである。この止水性伸縮フォームに対する湿熱老化試験の条件としては、相対湿度９０%RH、温度７０℃で、７日間行った。１０%圧縮Ｕ字止水試験を行ったが２４時間漏水は見られなかった。また、１０%圧縮セット・±２０%伸縮漏水試験を行ったが伸縮３７０回で漏水は見られなかった。 As the soft water-proof foam 26 and the hard water-proof foam 27 constituting the water-proof stretchable foam 25, for example, water-resistant foams having model numbers CS # 8137 and ER # 8137 manufactured by Asahi Kako Co., Ltd. can be used. The characteristics are as shown in Table 1. The conditions for the wet heat aging test for this water-stopping stretchable foam were 7 days at a relative humidity of 90% RH and a temperature of 70 ° C. A 10% compression U-shaped water stop test was conducted, but no water leakage was observed for 24 hours. Further, a 10% compression set / ± 20% expansion / contraction water leakage test was conducted, but no water leakage was observed after 370 expansions / contractions.

連泡ゴムスポンジ層２８は、例えば旭化工株式会社製の型番AF-0080の連泡ゴムスポンジを利用することができる。その特性は表２に示す通りである。５０%圧縮Ｕ字止水試験を行ったが２４時間漏水は見られなかった。スポンジ連泡率は、連泡率３０〜４５％のゴムスポンジに対してクラッシャー加工を施すことにより６５〜７５％に定めた。 For the open-cell rubber sponge layer 28, for example, open-cell rubber sponge of model number AF-0080 manufactured by Asahi Kako Co., Ltd. can be used. The characteristics are as shown in Table 2. A 50% compression U-shaped water stop test was conducted, but no water leakage was observed for 24 hours. The sponge open cell rate was set to 65 to 75% by crushing a rubber sponge having an open cell rate of 30 to 45%.

以上のように本実施形態は、道路橋の継目部に形成される遊間内に隣接して配置される２つの伸縮フォーム層２２の各端部に、止水性伸縮フォーム２５と連泡ゴムスポンジ層２８を設けたものである。すなわち止水性伸縮フォーム２５と連泡ゴムスポンジ層（発泡体）２８はともに止水機能を有する止水性部材であり、２つの伸縮フォーム層２２はこれらの止水性部材同士を密着させて連結される。 As described above, in the present embodiment, the water-stopping elastic foam 25 and the open-cell rubber sponge layer are formed at the ends of the two elastic foam layers 22 arranged adjacent to each other in the gap formed at the joint portion of the road bridge. 28 is provided. That is, both the water-stopping elastic foam 25 and the continuous foam rubber sponge layer (foam) 28 are water-stopping members having a water-stopping function, and the two stretchable foam layers 22 are connected by bringing these water-stopping members into close contact with each other. .

止水性伸縮フォーム２５は遊間の幅が縮小した場合、これに応じて圧縮変形し、これにより止水シート３１もその幅を縮小するように波形に変形する。また止水性伸縮フォーム２５は相対的に弾性の低い軟質止水性フォーム２６と弾性の高い硬質止水性フォーム２７とを幅方向に交互に配列して構成されているので、圧縮変形率の高い部分と低い部分が交互に分布することになる。２つの遊間用止水材２０が接続される部分において、互いの止水シート３１の波形変形、および止水性伸縮フォーム２５の端面の圧縮変形分布は同じにはならず、この変形の異なる両者を端面で、互いに対応する構成要素同士がずれることなく、かつ隙間が生じないように接続することは不可能である。しかし本実施形態では、止水性伸縮フォーム２５の端面には、圧縮性が高く、かつ伸縮率の大きな連泡ゴムスポンジ層２８が接続され、さらに止水シート３１の端部は、連泡ゴムスポンジ層２８の中央まで延びているので、２つの止水性伸縮フォーム２５の変形差は吸収され、２つの遊間用止水材２０は液密を保って接続される。 When the width of the play is reduced, the water-stopping elastic foam 25 is compressed and deformed accordingly, and the water-stop sheet 31 is also deformed into a waveform so as to reduce the width. Further, the water-stopping elastic foam 25 is configured by alternately arranging a soft water-proofing foam 26 having a relatively low elasticity and a hard water-proofing foam 27 having a high elasticity in the width direction. Low parts are distributed alternately. In the part where the two waterstop materials 20 are connected, the waveform deformation of the waterstop sheet 31 and the compressive deformation distribution of the end face of the waterstop elastic foam 25 are not the same. It is impossible to connect the end faces so that the components corresponding to each other do not deviate from each other and no gap is generated. However, in the present embodiment, the end surface of the water-stopping elastic foam 25 is connected to the open-cell rubber sponge layer 28 having high compressibility and a high expansion / contraction rate, and the end portion of the water-stop sheet 31 is connected to the open-cell rubber sponge. Since it extends to the center of the layer 28, the deformation difference between the two water-stopping stretchable foams 25 is absorbed, and the two waterstop materials 20 are connected in a liquid-tight manner.

例えば図５に示されるように連泡ゴムスポンジ層２８が５０％以上圧縮した状態では、隣接する２つの止水シート３１が近接あるいは当接しており、２つの止水シート３１の間に隙間があったとしても圧縮された連泡ゴムスポンジ層２８によって雨水は遮断され、遊間用止水材２０（図２参照）から下方へ漏れることはない。 For example, as shown in FIG. 5, when the open-cell rubber sponge layer 28 is compressed by 50% or more, the two adjacent water-stop sheets 31 are close to or in contact with each other, and there is a gap between the two water-stop sheets 31. Even if there is, rainwater is blocked by the compressed foamed foam sponge layer 28 and does not leak downward from the waterstop material 20 (see FIG. 2).

このように本実施形態の遊間用止水材は、従来技術のように２つの伸縮フォーム層の間に反応硬化性のある弾性体を流し込んで充填するものではないので、工事現場における作業が非常に簡単になる。また表１と表２に示されるように止水性伸縮フォーム２５と連泡ゴムスポンジ層２８の伸縮性が大きいので、この遊間用止水材は橋桁の伸縮に対する追従性に優れ、十分な耐久性を有する。 As described above, the play-stop material of this embodiment does not flow and fill a reaction-curable elastic body between the two stretchable foam layers as in the prior art, so work at the construction site is very difficult. To be easy. Further, as shown in Tables 1 and 2, since the water-stopping elastic foam 25 and the open-cell rubber sponge layer 28 have high stretchability, this waterstop material for free play has excellent followability to the expansion and contraction of the bridge girder and has sufficient durability. Have

図６は第２の実施形態である遊間用止水材の構成を示している。第１の実施形態と異なる構成を説明すると、伸縮フォーム層２２の端部には止水性部材として連泡ゴムスポンジ層２８が設けられており、第１の実施形態のように止水性伸縮フォーム２５は設けられていない。止水シート３１と防塵フォーム３２は水平方向に延びて連泡ゴムスポンジ層２８の端面近くまで達している。すなわち連泡ゴムスポンジ層２８は止水シート３１と防塵フォーム３２よりも、例えば５〜２０mmくらい突出している。したがって第１の実施形態と同様に、２つの伸縮フォーム層２２の接続作業において、連泡ゴムスポンジ層２８が大きく圧縮されて相互に接着され、この状態において２つの止水シート３１は相互に近接する。 FIG. 6 shows the structure of the waterstop material for play according to the second embodiment. Explaining the configuration different from the first embodiment, the end of the stretchable foam layer 22 is provided with a continuous foam rubber sponge layer 28 as a watertight member, and the watertight stretchable foam 25 as in the first embodiment. Is not provided. The water-stop sheet 31 and the dust-proof foam 32 extend in the horizontal direction and reach the vicinity of the end face of the open-cell rubber sponge layer 28. That is, the open-cell rubber sponge layer 28 protrudes from the water-stop sheet 31 and the dust-proof foam 32 by, for example, about 5 to 20 mm. Therefore, as in the first embodiment, in the connecting operation of the two stretchable foam layers 22, the open-cell rubber sponge layer 28 is greatly compressed and bonded to each other, and in this state, the two water-stop sheets 31 are close to each other. To do.

連泡ゴムスポンジ層２８は橋軸の方向および遊間の長手方向の両方に伸縮性を有するので、止水シート３１の波形変形を吸収し、遊間用止水材２０の接続端面にはその波形変形が伝達されず、連泡ゴムスポンジ層２８によって雨水の漏水が防止される。また第１の実施形態と同様に、第２の実施形態の遊間用止水材は、工事現場における作業が簡単である、橋桁の伸縮に対する追従性に優れ、十分な耐久性を有する。 Since the open-cell rubber sponge layer 28 has elasticity in both the direction of the bridge axis and the longitudinal direction between play, it absorbs the wave deformation of the water-stop sheet 31, and the wave-form deformation on the connection end face of the water-stop material 20 for play. Is not transmitted, and the continuous foam rubber sponge layer 28 prevents rainwater from leaking. Similarly to the first embodiment, the waterstop material for play between the second embodiment is easy to work on the construction site, has excellent followability to the expansion and contraction of the bridge girder, and has sufficient durability.

図７は第３の実施形態である遊間用止水材の構成を示している。第２の実施形態と異なる構成を説明する。止水シート３１は伸縮フォーム層２２の端面において伸縮フォーム層２２の厚さ方向（すなわち鉛直下方）に折曲し、連泡ゴムスポンジ層２８の裏面の全体に密着する。止水シート３１の折曲した部分の長さは伸縮フォーム層２２の厚さに等しい。一方防塵フォーム３２は水平方向に延びて、連泡ゴムスポンジ層２８の端面近くまで達している。 FIG. 7 shows the configuration of the waterstop material for play according to the third embodiment. A configuration different from the second embodiment will be described. The water-stop sheet 31 is bent in the thickness direction of the stretchable foam layer 22 (that is, vertically downward) at the end face of the stretchable foam layer 22 and is in close contact with the entire back surface of the open-cell rubber sponge layer 28. The length of the bent portion of the water blocking sheet 31 is equal to the thickness of the stretchable foam layer 22. On the other hand, the dust-proof foam 32 extends in the horizontal direction and reaches near the end face of the open-cell rubber sponge layer 28.

第３の実施形態の遊間用止水材においても、第２の実施形態と同様に、止水シート３１の折曲部分に生じる波形の変形は連泡ゴムスポンジ層２８によって吸収され、隣接して設けられる２つの連泡ゴムスポンジ層２８同士は密着して接合される。したがって第３の実施形態によれば、この接合部分における雨水は連泡ゴムスポンジ層２８によって遮断され、下方へ漏水することはなく、第２の実施形態と同様な効果が得られる。 Also in the waterstop material for play between the third embodiment, as in the second embodiment, the waveform deformation generated in the bent portion of the waterstop sheet 31 is absorbed by the open-cell rubber sponge layer 28 and adjacent thereto. The two open-cell rubber sponge layers 28 provided are in close contact with each other. Therefore, according to the third embodiment, rainwater at the joint portion is blocked by the continuous foam rubber sponge layer 28 and does not leak downward, and the same effect as in the second embodiment can be obtained.

図８は第４の実施形態である遊間用止水材の伸縮フォーム層２２を示している。この伸縮フォーム層２２の端部である止水性伸縮フォーム２５は、第１の実施形態と同様に、止水機能を有する連通多孔質の止水性吸水ゲル化フォームであり、相対的に低い弾性を有する軟質止水性フォーム２６と、相対的に高い弾性を有する硬質止水性フォーム２７とを、伸縮フォーム層２２の幅方向に交互に配設するとともに接着して構成される。連泡ゴムスポンジ層２８は設けられていない。その他の構成は第１の実施形態と同様であり、作用効果については、連泡ゴムスポンジ層２８による止水機能がない点を除いて第１の実施形態と同様である。 FIG. 8 shows the stretchable foam layer 22 of the waterstop material for play according to the fourth embodiment. The water-stopping stretchable foam 25 that is the end of the stretchable foam layer 22 is a continuous porous water-repellent water-absorbing gelled foam having a waterstop function, as in the first embodiment, and has a relatively low elasticity. The soft water-resistant foam 26 and the hard water-resistant foam 27 having relatively high elasticity are alternately arranged in the width direction of the stretchable foam layer 22 and bonded together. The open-cell rubber sponge layer 28 is not provided. Other configurations are the same as those of the first embodiment, and the operational effects are the same as those of the first embodiment except that there is no water stop function by the open-cell rubber sponge layer 28.

なお、上述した各実施形態では、伸縮フォーム層２２の端部に止水性部材（止水性伸縮フォーム２５および／または連泡ゴムスポンジ２８）が設けられていたが、これに代えて伸縮フォーム層２２を、止水性伸縮フォーム２５と同じ材料から成形し、止水性部材としてもよい。 In each of the above-described embodiments, the water-stopping member (water-stopping expandable foam 25 and / or open-cell rubber sponge 28) is provided at the end of the stretchable foam layer 22, but the stretchable foam layer 22 is replaced with this. May be formed from the same material as the water-stopping elastic foam 25 to form a water-stopping member.

また止水性部材（止水性伸縮フォーム２５および／または連泡ゴムスポンジ２８）を、連結される２つの伸縮フォーム層２２の一方の端部のみに設けて、この１つの止水性部材を介して２つの伸縮フォーム層２２が連結されてもよい。この場合、両方の伸縮フォーム層２２の上面に設けられた２枚の止水シート３１はそれぞれ止水性部材の上面まで延びる。 Further, a water-stopping member (water-stopping elastic foam 25 and / or open-cell rubber sponge 28) is provided only at one end of the two stretchable foam layers 22 to be connected, and the two water-stopping members are interposed through this one water-stopping member. Two stretchable foam layers 22 may be connected. In this case, the two waterproof sheets 31 provided on the upper surfaces of both the stretchable foam layers 22 respectively extend to the upper surfaces of the waterproof members.

さらに、道路橋伸縮装置において、伸縮フォーム層２２が設けられていない部分、すなわち図１において遊間用止水材２０の両側に位置するＬ字形鋼の端面に止水性部材を設けてもよい。これによれば継目部分の止水機能をさらに向上させることができる。 Further, in the road bridge expansion / contraction device, a water-stopping member may be provided on a portion where the expansion / contraction foam layer 22 is not provided, that is, on the end surfaces of the L-shaped steels located on both sides of the play-stop material 20 in FIG. According to this, the water stop function of a joint part can further be improved.

なお遊間用止水材２０の設置場所は、ウェブプレート３０、３０間に限定されず、これらのウェブプレートの下方に位置する橋桁間の遊間であってもよい。 In addition, the installation place of the water stop material 20 for play is not limited between the web plates 30 and 30, and may be a play between bridge girders located below these web plates.

２０遊間用止水材
２２伸縮フォーム層
２５止水性伸縮フォーム（止水性部材）
２８連泡ゴムスポンジ（止水性部材）
３１止水シート 20 Water stoppage material 22 Stretchable foam layer 25 Watertight stretchable foam (waterproof member)
28 Open-cell rubber sponge (water-proof member)
31 Water stop sheet

Claims

道路橋の遊間内に設けられる遊間用止水材であって、
前記遊間に沿って延びるとともに前記遊間の変位に追随可能である第１および第２の伸縮フォーム層と、
止水機能を有し、前記第１の伸縮フォーム層の端部に設けられる第１の止水性部材と、
止水機能を有し、前記第２の伸縮フォーム層の端部に設けられる第２の止水性部材と、
止水機能を有し、前記第１および第２の伸縮フォーム層の上面に設けられる第１および第２の止水シートとを備え、
前記第１および第２の止水シートはそれぞれ前記第１および第２の止水性部材の上面まで延び、
前記第１および第２の伸縮フォーム層は前記第１および第２の止水性部材同士を密着させて連結されることを特徴とする遊間用止水材。 It is a water stop material for the play provided in the play of the road bridge,
First and second stretchable foam layers that extend along the gap and are capable of following the displacement between the gaps;
A first water-stop member having a water-stop function and provided at an end of the first stretch foam layer;
A second water-stop member having a water-stop function and provided at an end of the second stretchable foam layer;
A first and second water-stop sheet having a water-stop function and provided on the upper surfaces of the first and second stretchable foam layers;
The first and second waterproof sheets extend to the upper surfaces of the first and second waterproof members, respectively.
The first and second stretchable foam layers are connected to each other with the first and second water-stop members being brought into close contact with each other.

前記第１および第２の止水性部材がそれぞれ、連通多孔質の第１および第２の止水性伸縮フォームを有することを特徴とする請求項１に記載の遊間用止水材。 The water-stopping material for play according to claim 1, wherein the first and second water-stop members have first and second water-proof stretchable foams that are communicated porous, respectively.

前記第１および第２の止水性部材がさらに、前記第１および第２の止水性伸縮フォームの前面に設けられ、前記橋軸の方向および前記遊間の長手方向の両方に伸縮性を有する第１および第２の発泡体を有することを特徴とする請求項２に記載の遊間用止水材。 The first and second water-stop members are further provided on the front surfaces of the first and second water-proof stretchable foams, and have a stretchability in both the direction of the bridge shaft and the longitudinal direction between the play. The waterstop material for play according to claim 2, further comprising a second foam.

前記第１および第２の止水シートがそれぞれ、前記第１および第２の止水性伸縮フォームの前面よりも突出して前記第１および第２の発泡体の上面まで延び、前記第１および第２の発泡体が接することを特徴とする請求項３に記載の遊間用止水材。 The first and second water-stop sheets protrude from the front surfaces of the first and second water-proof stretchable foams and extend to the top surfaces of the first and second foams, respectively. The water-stopping material for play according to claim 3, wherein the foam is in contact.

前記第１および第２の止水性伸縮フォームがそれぞれ、相対的に低い弾性を有する軟質止水性フォームと相対的に高い弾性を有する硬質止水性フォームとを前記遊間の幅方向に交互に配設して構成されることを特徴とする請求項１〜３のいずれか１項に記載の遊間用止水材。 Each of the first and second water-stopping elastic foams includes a soft water-proof foam having a relatively low elasticity and a hard water-proof foam having a relatively high elasticity, alternately arranged in the width direction between the spaces. The waterstop material for play between any one of Claims 1-3 characterized by the above-mentioned.

前記第１および第２の止水性部材がそれぞれ、前記橋軸の方向および前記遊間の長手方向の両方に伸縮性を有する第１および第２の発泡体であることを特徴とする請求項１に記載の遊間用止水材。 The said 1st and 2nd water-stop member is the 1st and 2nd foam which has a stretching property in both the direction of the said bridge axis, and the longitudinal direction between the said play, respectively. The water-stopping material for play as described.

前記第１および第２の止水シートがそれぞれ、前記第１および第２の発泡体の端面まで延び、相互に近接することを特徴とする請求項６に記載の遊間用止水材。 The said water stop sheet | seat for play of Claim 6 characterized by the said 1st and 2nd water stop sheet | seat extending to the end surface of the said 1st and 2nd foam, respectively, and adjoining mutually.

前記第１および第２の止水シートがそれぞれ、前記第１および第２の伸縮フォーム層の端面において前記第１および第２の伸縮フォーム層の少なくとも厚さ方向に折曲し、前記第１および第２の発泡体の裏面の全体に密着することを特徴とする請求項６に記載の遊間用止水材。 The first and second water-stop sheets are bent at least in the thickness direction of the first and second stretchable foam layers at the end surfaces of the first and second stretchable foam layers, respectively. The waterstop material for play according to claim 6, which is in close contact with the entire back surface of the second foam.

道路橋の遊間内に設けられる遊間用止水材であって、
前記遊間に沿って延びるとともに前記遊間の変位に追随可能であり、止水機能を有する第１および第２の伸縮フォーム層と、
止水機能を有し、前記第１および第２の伸縮フォーム層の上面に設けられる第１および第２の止水シートとを備え、
前記第１および第２の伸縮フォーム層は端部同士を密着させて連結されることを特徴とする遊間用止水材。 It is a water stop material for the play provided in the play of the road bridge,
First and second stretchable foam layers that extend along the gap and can follow the displacement between the gaps and have a water stop function;
A first and second water-stop sheet having a water-stop function and provided on the upper surfaces of the first and second stretchable foam layers;
The first and second stretchable foam layers are connected to each other with the end portions in close contact with each other.

道路橋の遊間内に設けられる遊間用止水材であって、
前記遊間に沿って延びるとともに前記遊間の変位に追随可能である第１および第２の伸縮フォーム層と、
止水機能を有し、前記第１および第２の伸縮フォーム層の少なくとも一方の端部に設けられる止水性部材と、
止水機能を有し、前記第１および第２の伸縮フォーム層の上面に設けられる第１および第２の止水シートとを備え、
前記第１および第２の止水シートはそれぞれ前記止水性部材の上面まで延び、
前記第１および第２の伸縮フォーム層は前記止水性部材を介して連結されることを特徴とする遊間用止水材。 It is a water stop material for the play provided in the play of the road bridge,
First and second stretchable foam layers that extend along the gap and are capable of following the displacement between the gaps;
A water-stopping member having a water-stopping function and provided at at least one end of the first and second stretchable foam layers;
A first and second water-stop sheet having a water-stop function and provided on the upper surfaces of the first and second stretchable foam layers;
Each of the first and second waterproof sheets extends to the upper surface of the waterproof member,
The first and second stretchable foam layers are connected to each other via the water-stop member, and the water-stop material for play is characterized in that

道路橋の継目部に設けられる道路橋伸縮装置であって、
前記道路橋の遊間に沿って延びるフェースプレートと、
前記フェースプレートの下方に設けられ、前記遊間に沿って延びるとともに前記遊間の変位に追随可能である第１および第２の伸縮フォーム層と、
止水機能を有し、前記第１の伸縮フォーム層の端部に設けられる第１の止水性部材と、
止水機能を有し、前記第２の伸縮フォーム層の端部に設けられる第２の止水性部材と、
止水機能を有し、前記第１および第２の伸縮フォーム層の上面に設けられる第１および第２の止水シートとを備え、
前記第１および第２の止水シートはそれぞれ前記第１および第２の止水性部材の上面まで延び、
前記第１および第２の伸縮フォーム層は前記第１および第２の止水性部材同士を密着させて連結されることを特徴とする道路橋伸縮装置。 A road bridge expansion / contraction device provided at the joint of the road bridge,
A face plate extending along the gap of the road bridge;
First and second stretchable foam layers provided below the face plate, extending along the play and capable of following displacement between the play;
A first water-stop member having a water-stop function and provided at an end of the first stretch foam layer;
A second water-stop member having a water-stop function and provided at an end of the second stretchable foam layer;
A first and second water-stop sheet having a water-stop function and provided on the upper surfaces of the first and second stretchable foam layers;
The first and second waterproof sheets extend to the upper surfaces of the first and second waterproof members, respectively.
The road bridge expansion and contraction device, wherein the first and second stretchable foam layers are connected by bringing the first and second water-stopping members into close contact with each other.