JP5728255B2 - Structure of the joint of the road bridge - Google Patents

Structure of the joint of the road bridge Download PDF

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JP5728255B2
JP5728255B2 JP2011047645A JP2011047645A JP5728255B2 JP 5728255 B2 JP5728255 B2 JP 5728255B2 JP 2011047645 A JP2011047645 A JP 2011047645A JP 2011047645 A JP2011047645 A JP 2011047645A JP 5728255 B2 JP5728255 B2 JP 5728255B2
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curved surface
vertical curved
concrete
floor slab
frp
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JP2012184577A (en
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圭吾 久保
圭吾 久保
豊六 桑山
豊六 桑山
靖雄 福永
靖雄 福永
壮宏 今村
壮宏 今村
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West Nippon Expressway Co Ltd
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Description

本発明は、道路橋の継手の構造に関するものである。   The present invention relates to a structure of a joint for a road bridge.

コンクリート床版で構成した道路橋は、コンクリートの伸縮を吸収するために継手部に間隔を設けてある。
しかしその間隔から雨水などが落下しては不都合なので、落下しないような工夫を施してある。
例えば図６に示すように、床版コンクリートａの端面の鋼製の端面板ｂの間の継手部ｃに伸縮性の膜ｄを取り付けたり、シール材を充填して構成している。 The road bridge composed of concrete floor slabs has a gap in the joint to absorb the expansion and contraction of the concrete.
However, since it is inconvenient if rainwater falls from the interval, it is designed not to fall.
For example, as shown in FIG. 6, a stretchable film d is attached to a joint portion c between steel end plates b on the end surface of the floor slab concrete a, or a sealing material is filled.

特許３４４２３６２号公報Japanese Patent No. 3442362

前記したような従来の道路橋の継手の構造にあっては、次のような問題点がある。   The conventional road bridge joint structure as described above has the following problems.

まず、継手部の端面板ｂを鋼製の板材で構成したことによる問題は以下の通りである。
＜１＞ 継手の端面板ｂが鋼製の板材であるために大きい耐摩耗性を備えている。
＜２＞ 一方、コンクリート版ａの路面やその上の舗装面はタイヤの通過、打撃で摩耗しやすい。
＜３＞ そのために、摩耗しにくい鋼製の端面板ｂと、コンクリートａとの間に、図７に示すように、摩耗の結果による段差が生じてしまう。
＜４＞ すると、先に摩耗したり破損したコンクリートａと、摩耗の遅れる鋼製の端面板ｂとの段差で、端面板ｂが突出した状態となり、その端面板ｂの側面に、通行する自動車のタイヤが乗り上げてジャンプして落下する。その繰り返しの衝撃によってコンクリートａが損傷を受け続ける。
＜５＞ その繰り返しの打撃によって、コンクリートａが損傷を受けると、コンクリートａの摩耗部分に雨水が溜まり、溜まった水が端面板ｂとの隙間から浸入して、端面板ｂを錆びさせる結果となる。
＜６＞ 特に凍結防止のために塩を散布する地域では、塩分がコンクリートａと鋼製の端面板ｂとの隙間に浸入して鋼材の腐食を早める。 First, problems due to the fact that the end face plate b of the joint portion is made of a steel plate material are as follows.
<1> Since the end face plate b of the joint is a steel plate material, it has high wear resistance.
<2> On the other hand, the road surface of the concrete plate a and the paved surface thereon are easily worn by passing and hitting the tire.
<3> Therefore, as shown in FIG. 7, the level | step difference by the result of abrasion will arise between the steel end surface board b which is hard to wear, and the concrete a.
<4> Then, the end plate b protrudes at the level difference between the worn or damaged concrete a and the steel end plate b that is delayed in wear, and the vehicle passes through the side surface of the end plate b. Tires jump on and jump and fall. The concrete a continues to be damaged by the repeated impact.
<5> When the concrete a is damaged due to repeated hitting, rain water accumulates in the worn part of the concrete a, and the accumulated water enters through the gap between the end face plate b and causes the end face plate b to rust. Become.
<6> Particularly in an area where salt is sprayed to prevent freezing, salt enters the gap between the concrete a and the steel end plate b to accelerate corrosion of the steel material.

次に継手部の止水の問題は次の通りである。
＜１＞ 従来の継手の止水は、継手間に充填した膨張材や、図６に示すように両者間に張り渡した伸縮膜ｄによって行っている。
＜２＞ この伸縮膜ｄが破損した場合に、交換する必要があるが、破損した膜ｄの撤去と新たな膜ｄの取り付けを行う際に、わずか数ｃｍの狭い継ぎ目の隙間から行なわなければならず、非常に困難な作業であり、信頼性の低いものだった。
＜３＞ さらに伸縮膜ｄの両端部を、鉛直な端面板ｄに取り付けているだけであるから、冬季にコンクリートａが収縮して継手部ｃの間隔が開くと、剥離しやすい構造であった。 Next, the problem of water stoppage at the joint is as follows.
<1> The water stop of a conventional joint is performed by an expansion material filled between the joints or a stretchable film d stretched between the two as shown in FIG.
<2> When this stretchable membrane d is damaged, it is necessary to replace it. However, when removing the damaged membrane d and attaching a new membrane d, it must be performed from a gap of a narrow seam of only a few cm. It was very difficult and unreliable.
<3> Furthermore, since both ends of the stretchable film d are only attached to the vertical end plate d, the structure is easy to peel off when the concrete a contracts and the interval between the joints c opens in winter. .

上記のような課題を解決する本発明の道路橋の継手の構造は、道路橋のコンクリート床版の道路の中心軸横断方向の端面を、曲線を連続した鉛直曲面によって構成し、その表面は摩擦に対する抵抗が大きくなく、コンクリートの摩耗とともに摩耗してゆくＦＲＰの鉛直曲面で構成し、ＦＲＰ板の鉛直曲面の背面には控え板を突出し、控え板はコンクリートの内部に配置したものである。
また本発明の道路橋の継手の構造は、道路橋のコンクリート床版の道路の中心軸横断方向の端面を、曲線を連続した鉛直曲面によって構成し、その表面は摩擦に対する抵抗が大きくなく、コンクリートの摩耗とともに摩耗してゆくＦＲＰの鉛直曲面で構成し、その表面のＦＲＰ製の鉛直曲面には、水平方向に鉛直曲面から突出した状態の係合溝を連続して形成し、ひとつのコンクリート床版を隣接するコンクリート床版と端面を対向して設置した場合に、一方の鉛直曲面の係合溝と他方の鉛直曲面の係合溝は、相互に対向する位置に配置でき、両側の係合溝の内部に断面Ｖ字形の止水ゴムの折り返し端部を嵌合し得るように構成したものである。
The structure of the joint of the road bridge of the present invention that solves the above-described problem is that the end surface in the direction crossing the central axis of the road of the concrete floor slab of the road bridge is constituted by a continuous vertical curved surface, and the surface is frictional The FRP is composed of a vertical curved surface of the FRP that wears with the wear of the concrete, and a back plate protrudes from the back of the vertical curved surface of the FRP plate, and the back plate is disposed inside the concrete.
Further, the structure of the joint of the road bridge of the present invention is such that the end face in the direction crossing the center axis of the road of the concrete floor slab of the road bridge is constituted by a continuous curved curved surface, and the surface has no large resistance to friction, and the concrete It is composed of FRP vertical curved surface that wears along with the wear of the surface, and the FRP vertical curved surface on the surface is continuously formed with engaging grooves protruding from the vertical curved surface in the horizontal direction, and one concrete floor When the plate is installed facing the adjacent concrete floor slab and the end face, the engagement groove on one vertical curved surface and the engagement groove on the other vertical curved surface can be placed at positions facing each other, and the engagement on both sides A folded end portion of water-stopping rubber having a V-shaped cross section can be fitted inside the groove.

本発明の道路橋の継手の構造は以上説明したようになるから次のような効果を得ることができる。
まずＦＲＰ板を使用したための効果は次の通りである。
＜１＞ ＦＲＰ製の鉛直曲面は、摩擦に対する抵抗が大きくないから、コンクリートの摩耗とともに摩耗してゆき、鋼板のように突出することがない。
＜２＞ そのためにコンクリートとの一体化が維持され、隙間が生じたり、その隙間に雨水や塩水が浸入することがない。
＜３＞ 鋼板と異なって塩水によっても腐食することがない。
＜４＞ 軽量であるから、設置作業、交換作業が容易である。 Since the structure of the joint of the road bridge of the present invention is as described above, the following effects can be obtained.
First, the effect of using the FRP plate is as follows.
<1> Since the FRP vertical curved surface does not have a large resistance to friction, it wears with the wear of concrete and does not protrude like a steel plate.
<2> Therefore, integration with concrete is maintained, and no gap is formed, and rainwater and salt water do not enter the gap.
<3> Unlike steel sheets, it is not corroded by salt water.
<4> Since it is lightweight, installation work and replacement work are easy.

また係合溝を設けたための効果は次の通りである。
＜１＞ わずか数ｃｍの狭い隙間からの止水帯の撤去も嵌合も、すべて鉛直方向の作業であるから、作業が容易であり、嵌合後の信頼性が高い。
＜２＞ 係合溝が鉛直方向に形成してあるから、冬季に鉛直面間の間隔が開いた場合にも止水帯が鉛直面から剥離することがない。
＜３＞ したがって長期にわたって継手部分における止水性について、高い信頼性を維持できる。 The effects of providing the engaging groove are as follows.
<1> Since the removal and fitting of the waterstop from a narrow gap of only a few centimeters are all work in the vertical direction, the work is easy and the reliability after fitting is high.
<2> Since the engagement groove is formed in the vertical direction, the waterstop does not peel from the vertical surface even when the interval between the vertical surfaces is opened in winter.
<3> Therefore, high reliability can be maintained for the water stoppage at the joint portion over a long period of time.

本発明の道路橋の継手の構造の全体の説明図。The explanatory view of the whole structure of the joint of the road bridge of the present invention. 鉛直曲面の実施例の背面から見た説明図。Explanatory drawing seen from the back surface of the Example of a vertical curved surface. 継手の部分の断面図。Sectional drawing of the part of a coupling. 継手の部分の平面図。The top view of the part of a coupling. コンクリートともに曲面を構成するＦＲＰ板も摩耗する状態の説明図。Explanatory drawing of the state in which the FRP board which comprises a curved surface with concrete also wears. 従来の継手の止水構造の一例の説明図。Explanatory drawing of an example of the water stop structure of the conventional coupling. 従来の鋼製の継手とコンクリートの摩耗状態の説明図。Explanatory drawing of the abrasion state of the conventional steel coupling and concrete.

以下図面を参照にしながら本発明の好適な実施の形態を詳細に説明する。   DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

＜１＞前提条件
本願発明は、道路橋の継手の構造に関するものである。
道路橋のコンクリート床版１は図１に示すように橋脚Ａの上に配置した鋼材の桁Ｂの上に設置してある。
そして隣接するコンクリート床版１との継手部分は、コンクリート床版１の伸縮を吸収できるだけの隙間を介在して位置している。
本発明は、このコンクリート床版１の端面である継手部分の改良に関するものである。 <1> Precondition The present invention relates to the structure of a joint for a road bridge.
A concrete floor slab 1 of a road bridge is installed on a steel beam girder B arranged on a pier A as shown in FIG.
And the joint part with the adjacent concrete floor slab 1 is located through the gap which can absorb the expansion and contraction of the concrete floor slab 1.
The present invention relates to an improvement of a joint portion which is an end face of the concrete floor slab 1.

＜２＞鉛直曲面
本発明のコンクリート床版１では、その道路の中心軸方向と直交する端面である継ぎ目を、曲線を連続した鉛直曲面２によって構成する。
そして、実際に道路橋として鋼材の桁Ｂの上に設置する場合には、一方のコンクリート床版１の鉛直曲面２の凹部を、隣接する他方のコンクリート床版１の鉛直曲面２の凸部に組み合わせ、隙間を介して対向する状態で設置する。
あるいは一方のコンクリート床版１の鉛直曲面２を、橋台側の継手の鉛直曲面２の凹凸に合わせ、隙間を介して対向する状態で設置する。 <2> Vertical curved surface In the concrete floor slab 1 of the present invention, the seam, which is an end surface orthogonal to the direction of the central axis of the road, is constituted by a vertical curved surface 2 having a continuous curve.
And when installing actually on the steel beam B as a road bridge, the recessed part of the vertical curved surface 2 of one concrete floor slab 1 is made into the convex part of the vertical curved surface 2 of the other adjacent concrete floor slab 1 Install in a state of facing each other through a gap.
Or the vertical curved surface 2 of one concrete floor slab 1 is installed in the state which opposes the unevenness | corrugation of the vertical curved surface 2 of the joint by the side of an abutment, and opposes through a clearance gap.

＜３＞ＦＲＰで構成
この鉛直曲面２の表面をＦＲＰ板で構成する。
実際の床版１の構築に際しては、鉛直曲面２を構成するＦＲＰ板を、コンクリート床版１の妻板としての型枠として配置する。
そしてＦＲＰ板の裏側に鉄筋を配置し、コンクリートを打設してコンクリート床版１を形成する。 <3> Configuration with FRP The surface of the vertical curved surface 2 is configured with an FRP plate.
In actual construction of the floor slab 1, the FRP plate constituting the vertical curved surface 2 is arranged as a formwork as the end plate of the concrete floor slab 1.
Then, a reinforcing bar is disposed on the back side of the FRP plate, and concrete is placed to form the concrete slab 1.

＜４＞控え板
ＦＲＰ板の鉛直曲面２の背面には、複数個所に控え板３を突出する。
この控え板３は床版１のコンクリートの内部に配置されることになる。
各控え板３には貫通孔３１を開口して、これらの貫通孔３１を貫通させて鉄筋などを配置する。
この貫通させた鉄筋は、道路橋の中心軸を横断する方向に配置することになる。
さらに、ＦＲＰ板の鉛直曲面２の背面や、控え板３の表面には砂などの粒子を接着剤で塗布すると、コンクリート床版１とコンクリートとの付着を大きくすることもできる。 <4> Retaining plate Retaining plates 3 protrude at a plurality of locations on the back surface of the vertical curved surface 2 of the FRP plate.
The backing plate 3 is disposed inside the concrete of the floor slab 1.
Through holes 31 are opened in the respective retainer plates 3, and reinforcing bars and the like are disposed through the through holes 31.
This penetrated reinforcing bar is arranged in a direction crossing the central axis of the road bridge.
Further, when particles such as sand are applied to the back surface of the vertical curved surface 2 of the FRP plate and the surface of the backing plate 3 with an adhesive, the adhesion between the concrete floor slab 1 and the concrete can be increased.

＜５＞係合溝
ＦＲＰ製の鉛直曲面２には、水平方向に係合溝４を連続して形成する。
ＦＲＰ製の鉛直曲面２が連続した曲面を形成しているから、係合溝４もまた連続した曲線を形成することになる。
この係合溝４の溝底４１と縁板は、鉛直曲面２から外側に向けて突出して状態で位置している。
実際の道路橋においてコンクリート床版１を鋼桁Ｂの上に配置する場合には、一方のコンクリート床版１の鉛直曲面２の係合溝４と、隣接する他方のコンクリート床版１の鉛直曲面２の係合溝４は対向する位置に配置されることになる。 <5> Engagement groove The engagement groove 4 is continuously formed in the horizontal direction on the vertical curved surface 2 made of FRP.
Since the FRP vertical curved surface 2 forms a continuous curved surface, the engagement groove 4 also forms a continuous curve.
The groove bottom 41 and the edge plate of the engagement groove 4 are located in a state protruding from the vertical curved surface 2 toward the outside.
When the concrete floor slab 1 is arranged on the steel beam B in an actual road bridge, the engaging groove 4 of the vertical curved surface 2 of one concrete floor slab 1 and the vertical curved surface of the other adjacent concrete floor slab 1 are provided. The two engaging grooves 4 are arranged at opposing positions.

＜６＞止水帯
止水帯５は、ゴムなどの柔軟性、耐久性のある材料の薄い膜によって構成した断面Ｖ字状の長い部材である。
そしてその断面の両端には、折り返し縁５１を形成する。
すなわち断面でみると、中央のＶ字状の両縁に、逆Ｖ字状の折り返し縁５１を形成した形状を呈する。
この折り返し縁５１の寸法は、前記した係合溝４の内部に、上から挿入できる厚さ、幅を備えている。
そして、実際にコンクリート床版１を鋼桁Ｂの上に配置した場合に、対向する場所に位置する両側の係合溝４の内部に、断面Ｖ字形の止水帯５の折り返し縁５１を嵌合する。
この止水帯５の設置は、コンクリート床版１の配置後に行うから、狭い隙間からの作業になる。
しかし本発明の係合溝４は上向きの空間であり、止水帯５の折り返し縁５１は下向きの単片であるから、何らかの治具を使用して上から押込めるだけで、両者をパチッと嵌合することができる。 <6> Water stop zone The water stop zone 5 is a long member having a V-shaped cross section constituted by a thin film of a flexible and durable material such as rubber.
Then, folded edges 51 are formed at both ends of the cross section.
That is, when viewed in cross-section, it has a shape in which inverted V-shaped folded edges 51 are formed on both edges of the center V-shape.
The folded edge 51 has a thickness and a width that can be inserted into the engaging groove 4 from above.
And when the concrete floor slab 1 is actually disposed on the steel beam B, the folded edge 51 of the water-stop band 5 having a V-shaped cross section is fitted inside the engaging grooves 4 on both sides located at opposite positions. Match.
Since the waterstop 5 is installed after the concrete slab 1 is arranged, the work is performed from a narrow gap.
However, since the engagement groove 4 of the present invention is an upward space and the folded edge 51 of the waterstop 5 is a downward single piece, both can be snapped by simply pushing in using some jig. Can be fitted.

＜７＞止水帯の撤去と再設置
図４に示すように、道路橋Ｉと、道路橋ＩＩのコンクリート床版１の継手部Ｃには隙間が存在する。
そのために、この隙間から砂や塵埃が挿入し、それらがタイヤで押込められるので止水帯５は破損しやすい。
破損したら撤去して再設置をする必要があるが、その場合に、道路橋の交通の支障になる時間を短くするために、破損した止水帯５の撤去と、再設置の作業は簡単で短時間に完了する作業であることが要求される。
その点で本発明の止水帯５の設置構造は、前記したように係合溝４は上向きの空間であり、止水帯５の折り返し縁５１は下向きの単片であるから、何らかの治具を使用して上から引き揚げるだけで容易に止水帯５を係合溝４から引き出すことができる。
再設置の際には、引き出して撤去した後に、何らかの治具を使用して上から押込めるだけで、再度、両者をパチッと嵌合することができる。 <7> Removal and Reinstallation of Water Stop Zone As shown in FIG. 4, there is a gap in the joint portion C of the road deck I and the concrete floor slab 1 of the road bridge II.
Therefore, sand and dust are inserted from this gap and they are pushed in by the tire, so the water stop zone 5 is easily damaged.
If it is damaged, it must be removed and re-installed. In that case, in order to shorten the time that hinders traffic on the road bridge, the removal and re-installation of the damaged water stop 5 is easy. The work must be completed in a short time.
In that respect, the installation structure of the waterstop 5 of the present invention is that, as described above, the engagement groove 4 is an upward space, and the folded edge 51 of the waterstop 5 is a downward single piece. The waterstop 5 can be easily pulled out from the engagement groove 4 simply by lifting the top from above.
At the time of re-installation, after pulling out and removing, it is possible to snap them together again simply by pushing in from above using some kind of jig.

＜８＞均一な摩耗（図５）
上記したように本願発明の継手では、その端面はＦＲＰ製の鉛直曲面２で構成してある。
そのために、従来の鋼材と比較して、タイヤの通過による摩擦に対する抵抗が大きくない。
そのために、図５に示すように、ＦＲＰ製の端面の鉛直曲面２はコンクリート１の摩耗と同時に摩耗してゆく。
したがって従来の鋼板製の継手構造のように、端面の板だけが地上部分へ突出することがない。
その結果、端面とコンクリートとの一体化が長く維持され、両者間に隙間が生じたり、その隙間に雨水や塩水が浸入することがない。 <8> Uniform wear (Figure 5)
As described above, in the joint of the present invention, the end surface is constituted by the vertical curved surface 2 made of FRP.
Therefore, compared with the conventional steel material, the resistance with respect to the friction by passage of a tire is not large.
Therefore, as shown in FIG. 5, the vertical curved surface 2 of the end surface made of FRP is worn simultaneously with the wear of the concrete 1.
Therefore, unlike the conventional steel plate joint structure, only the end face plate does not protrude into the ground portion.
As a result, the integration between the end face and the concrete is maintained for a long time, and there is no gap between them, and rainwater and salt water do not enter the gap.

１：床版コンクリート
２：鉛直曲面
３：控え板
４：係合溝
５：止水帯 1: Floor concrete 2: Vertical curved surface 3: Retaining plate 4: Engaging groove 5: Water stop zone

Claims (2)

道路橋のコンクリート床版の道路の中心軸横断方向の端面を、曲線を連続した鉛直曲面によって構成し、
その表面は摩擦に対する抵抗が大きくなく、コンクリートの摩耗とともに摩耗してゆくＦＲＰの鉛直曲面で構成し、
ＦＲＰ板の鉛直曲面の背面には控え板を突出し、
控え板はコンクリートの内部に配置した、
道路橋の継手の構造。 The end face in the direction crossing the central axis of the road of the concrete floor slab of the road bridge is composed of a continuous vertical curved surface,
Its surface is not very resistant to friction and is composed of FRP vertical curved surface that wears with concrete wear ,
A back plate protrudes from the back of the vertical curved surface of the FRP plate,
The backing plate was placed inside the concrete,
Road bridge joint structure. 道路橋のコンクリート床版の道路の中心軸横断方向の端面を、曲線を連続した鉛直曲面によって構成し、
その表面は摩擦に対する抵抗が大きくなく、コンクリートの摩耗とともに摩耗してゆくＦＲＰの鉛直曲面で構成し、
その表面のＦＲＰ製の鉛直曲面には、水平方向に鉛直曲面から突出した状態の係合溝を連続して形成し、
ひとつのコンクリート床版を隣接するコンクリート床版と端面を対向して設置した場合に、
一方の鉛直曲面の係合溝と他方の鉛直曲面の係合溝は、相互に対向する位置に配置でき、
両側の係合溝の内部に断面Ｖ字形の止水ゴムの折り返し端部を嵌合し得るように構成した、
道路橋の継手の構造。 The end face in the direction crossing the central axis of the road of the concrete floor slab of the road bridge is composed of a continuous vertical curved surface,
Its surface is not very resistant to friction and is composed of FRP vertical curved surface that wears with concrete wear ,
On the FRP vertical curved surface of the surface, an engagement groove in a state of protruding from the vertical curved surface in the horizontal direction is continuously formed,
When one concrete floor slab is installed opposite to an adjacent concrete floor slab,
The engagement groove of one vertical curved surface and the engagement groove of the other vertical curved surface can be arranged at positions facing each other,
It was comprised so that the folding | turning edge part of the water-stop rubber of a V-shaped cross section could be fitted inside the engaging groove of both sides,
Road bridge joint structure.
JP2011047645A 2011-03-04 2011-03-04 Structure of the joint of the road bridge Active JP5728255B2 (en)

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CN111622104A (en) * 2020-04-09 2020-09-04 罗海军 Construction method of butt strap structure for bump at bridge head

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5134747Y2 (en) * 1972-02-29 1976-08-27
JPS5471825A (en) * 1977-11-21 1979-06-08 Furukawa Electric Co Ltd Method of mounting expansing member holder for road bridges and so on
US4332504A (en) * 1979-11-05 1982-06-01 Motonosuke Arai Expansion joints for roads
JPS59107609U (en) * 1982-12-28 1984-07-20 新井　元之助 Road joint expansion device
JPH05272104A (en) * 1992-03-25 1993-10-19 Nitta Ind Corp Expansion joint for expansion gap
JPH0718615A (en) * 1993-06-30 1995-01-20 Rikako Wakabayashi Road structure of road bridge joint part
JP3442362B2 (en) * 2000-12-19 2003-09-02 日本道路公団 Expansion device for road bridge joint
JP4394703B2 (en) * 2007-05-10 2010-01-06 元之助 新井 Expansion joint for road bridge and its construction method

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