JP2002227131A - End section widening method for existing bridge - Google Patents

End section widening method for existing bridge

Info

Publication number
JP2002227131A
JP2002227131A JP2001029499A JP2001029499A JP2002227131A JP 2002227131 A JP2002227131 A JP 2002227131A JP 2001029499 A JP2001029499 A JP 2001029499A JP 2001029499 A JP2001029499 A JP 2001029499A JP 2002227131 A JP2002227131 A JP 2002227131A
Authority
JP
Japan
Prior art keywords
widening
bridge
existing bridge
existing
abutment
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2001029499A
Other languages
Japanese (ja)
Inventor
Hitohiro Nukaya
Mamoru Sugizaki
守 杉崎
仁博 額谷
Original Assignee
Ishikawajima Harima Heavy Ind Co Ltd
Ismic:Kk
株式会社イスミック
石川島播磨重工業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ishikawajima Harima Heavy Ind Co Ltd, Ismic:Kk, 株式会社イスミック, 石川島播磨重工業株式会社 filed Critical Ishikawajima Harima Heavy Ind Co Ltd
Priority to JP2001029499A priority Critical patent/JP2002227131A/en
Publication of JP2002227131A publication Critical patent/JP2002227131A/en
Pending legal-status Critical Current

Links

Abstract

PROBLEM TO BE SOLVED: To provide an end section widening method for an existing bridge capable of expanding an end section in width for securing a right turn lane or the like, with the existing bridge kept in use. SOLUTION: An abutment section supporting the end section 1a of the existing bridge 1 is expanded to form an abutment expansion section 21, and an expansion lower chord 23 is suspended between the abutment expansion section 21 and the expansion base end section of the existing bridge 1. A truss expansion main truss 24 is provided between the expansion lower chord 23 and the existing bridge to connect them, then members 13 and 14 of the existing bridge becoming obstacles of traffic are removed. The work is mainly performed on the outside of the existing bridge, not on the existing bridge, and the existing bridge can be expanded in width while kept in use.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION
【0001】[0001]
【発明の属する技術分野】この発明は既設橋の端部拡幅
方法に関し、片側1車線の既設橋などを使用した状態の
まま右折車線を拡幅できるようにしたもので、特に下路
トラス橋に適用して好適なものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for widening an end of an existing bridge, and more particularly to a method for widening a right-turn lane while using an existing bridge having one lane on each side, and is particularly applied to a lower truss bridge. It is preferable.
【0002】[0002]
【従来の技術】従来から使用されている既設橋の中に
は、例えば図3に示すように、片側1車線ずつしかな
く、橋1の端部1aから右折する車両2があると、直進
する車両や左折する車両が通過できず渋滞の原因となる
ような場合がある。
2. Description of the Related Art For example, as shown in FIG. 3, there is only one lane on each side of an existing bridge which has been conventionally used, and if there is a vehicle 2 turning right from an end 1a of the bridge 1, the vehicle goes straight. There is a case where a vehicle or a vehicle turning left cannot pass and may cause a traffic jam.
【0003】そこで、このような既設橋での渋滞を解消
しようとすると、橋の架け替えが必要となり、新たな橋
を架ける場合には多大な費用が掛かる一方、費用削減の
ため橋脚部分等を利用しようとすると、その間既設橋が
使用できなくなってしまうという問題があり、特に図示
例のような下路トラス橋では、トラス全体で荷重を支持
することから端部だけを拡幅することが難しいという問
題がある。
In order to eliminate such traffic congestion on an existing bridge, it is necessary to replace the bridge. When a new bridge is to be built, a great deal of cost is required. If you try to use it, there is a problem that the existing bridge will be unusable during that time, and it is difficult to widen only the end part of the lower truss bridge, as shown in the example shown, because the entire truss will support the load. There's a problem.
【0004】一方、既設橋を改修する工法として、例え
ば特開平8−3937号公報には、跨道橋や跨線橋等の
オーバーブリッジの下部の道路などの拡幅を行うため、
既設橋の両端部に新たな橋脚などを構築してこれら橋脚
間にアーチあるいはトラス桁等の支持構造体を架設し、
この支持構造体に既設の主桁を連結した後、既設の主桁
を支持する橋脚などを撤去することが開示されており、
既設の主桁を有効利用して施工性、経済性の向上を図り
つつ改修するようにしている。
On the other hand, as a method of repairing an existing bridge, for example, Japanese Patent Laid-Open Publication No. Hei 8-3937 discloses a method for widening a road under an overbridge such as an overpass or an overpass.
New piers are constructed at both ends of the existing bridge, and support structures such as arches or truss girders are erected between these piers.
It is disclosed that after connecting an existing main girder to this support structure, a pier or the like supporting the existing main girder is removed,
The existing main girder is effectively used to improve the workability and economic efficiency while renovating.
【0005】[0005]
【発明が解決しようとする課題】ところが、このような
既設橋の改修工法では、既設橋を橋軸方向に延ばす場合
の改修方法であり、そのまま既設橋の拡幅に適用するこ
とが出来ず、例え適用するとしても既設の主桁に沿って
アーチあるいはトラス桁などの支持構造体を架設する必
要があり、既設橋を使用状態のまま改修することができ
ず、長期間の交通止めが必要となるという問題がある。
However, such a method for repairing an existing bridge is a method for extending the existing bridge in the bridge axis direction, and cannot be directly applied to widening the existing bridge. Even if applied, support structures such as arches or truss girders must be erected along the existing main girder, and existing bridges cannot be repaired while in use, requiring long-term traffic suspension There is a problem.
【0006】この発明は、上記従来技術の有する課題に
鑑みてなされたもので、既設橋を使用した状態のまま端
部を拡幅して右折車線等を確保することができる既設橋
の端部拡幅方法を提供しようとするものである。
SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and has a widened end which can secure a right turn lane or the like while using the existing bridge. It seeks to provide a way.
【0007】[0007]
【課題を解決するための手段】上記従来技術が有する課
題を解決するため、この発明の請求項1記載の既設橋の
端部拡幅方法は、既設橋の端部を少なくとも1車線分拡
幅するに際し、既設橋の端部を支持する橋台部を拡幅部
に対応して支持可能とし、この拡幅部を支持可能な橋台
部と前記既設橋の拡幅基端部との間に拡幅用下弦材を架
け渡し、この拡幅用下弦材と前記既設橋との間に補強用
部材を設けて補強した後、交通の支障となる前記既設橋
の部材を除去するようにしたことを特徴とするものであ
る。
According to a first aspect of the present invention, there is provided a method for widening an end of an existing bridge, the method comprising the steps of expanding an end of an existing bridge by at least one lane. An abutment supporting the end of the existing bridge can be supported corresponding to the widened portion, and a lower chord material for widening is bridged between the abutment capable of supporting the widened portion and the widened base end of the existing bridge. The present invention is characterized in that a reinforcing member is provided between the lower chord material for widening and the existing bridge to reinforce the member, and then the members of the existing bridge that hinder traffic are removed.
【0008】この既設橋の端部拡幅方法によれば、既設
橋の端部を少なくとも1車線分拡幅するに際し、既設橋
の端部を支持する橋台部を拡幅部に対応して支持可能と
し、この拡幅部を支持可能な橋台部と前記既設橋の拡幅
基端部との間に拡幅用下弦材を架け渡し、この拡幅用下
弦材と前記既設橋との間に補強用部材を設けて補強した
後、交通の支障となる前記既設橋の部材を除去するよう
にしており、既設橋の橋台部で拡幅部を支持できるよう
にし、これに拡幅用下弦材を支持して補強用部材で補強
することで、既設橋上での作業を無くし、使用状態のま
ま拡幅することができるようにしている。
According to this method of widening the end of an existing bridge, when widening the end of the existing bridge by at least one lane, the abutment supporting the end of the existing bridge can be supported corresponding to the widened portion, A widening lower chord material is bridged between the abutment capable of supporting the widening portion and the widening base end of the existing bridge, and a reinforcing member is provided between the widening lower chord and the existing bridge to reinforce. After that, the members of the existing bridge that interfere with traffic are removed, so that the widened part can be supported by the abutment part of the existing bridge, and the lower chord material for widening is supported by this and reinforced with the reinforcing member By doing so, the work on the existing bridge is eliminated, and it is possible to widen the width in use.
【0009】また、この発明の請求項2記載の既設橋の
端部拡幅方法は、請求項1記載の構成に加え、前記既設
橋の端部を支持する前記橋台部を拡げて橋台拡幅部を構
築して前記拡幅部に対応して支持可能としたことを特徴
とするものである。
According to a second aspect of the present invention, there is provided a method for widening an end of an existing bridge, wherein the abutment for supporting an end of the existing bridge is expanded to expand the abutment widening portion. It is characterized in that it can be constructed and supported corresponding to the widened portion.
【0010】この既設橋の端部拡幅方法によれば、前記
既設橋の端部を支持する前記橋台部を拡げて橋台拡幅部
を構築して前記拡幅部に対応して支持可能としており、
既設橋の外側に橋台拡幅部を構築し、これに拡幅用下弦
材を支持して補強用部材で補強することで、既設橋上で
の作業を無くし、使用状態のまま拡幅することができる
ようにしている。
According to this method of widening the end of an existing bridge, the abutment for supporting the end of the existing bridge is expanded to form an abutment widening portion, which can be supported corresponding to the widening portion.
By constructing an abutment widening part outside the existing bridge, supporting the lower chord material for widening and reinforcing it with reinforcing members, the work on the existing bridge can be eliminated and the widening can be performed as it is in use. ing.
【0011】さらに、この発明の請求項3記載の既設橋
の端部拡幅方法は、請求項1または2記載の構成に加
え、前記既設橋を下路トラス橋とし、前記補強用部材を
トラス構造として補強する一方、交通の支障となる当該
下路トラス橋の橋門構や垂直材や斜材を除去するように
したことを特徴とするものである。
According to a third aspect of the present invention, there is provided a method for widening an end of an existing bridge, wherein the existing bridge is a lower truss bridge and the reinforcing member is a truss structure. On the other hand, the bridge structure, vertical members and diagonal members of the lower truss bridge, which hinder traffic, are removed.
【0012】この既設橋の端部拡幅方法によれば、前記
既設橋を下路トラス橋とし、前記補強用部材をトラス構
造として補強する一方、交通の支障となる当該下路トラ
ス橋の橋門構や垂直材や斜材を除去するようにしてお
り、下路トラス橋であっても補強用部材をトラス構造と
することで、トラス橋としたまま拡幅できるようにして
いる。
According to this method of widening the end of an existing bridge, the existing bridge is used as a lower truss bridge, and the reinforcing member is reinforced as a truss structure. The structure, vertical members and diagonal members are removed, and even if it is a lower truss bridge, the reinforcing members are truss structures so that the truss bridge can be widened.
【0013】また、この発明の請求項4記載の既設橋の
端部拡幅方法は、請求項1〜3のいずれかに記載の構成
に加え、前記既設橋の拡幅部を含む端部の路面を鋼床版
で構成したことを特徴とするものである。
According to a fourth aspect of the present invention, there is provided a method for widening an end portion of an existing bridge, wherein in addition to the configuration according to any one of the first to third aspects, a road surface at an end portion including the widened portion of the existing bridge is provided. It is characterized by comprising a steel deck.
【0014】この既設橋の端部拡幅方法によれば、前記
既設橋の拡幅部を含む端部の路面を鋼床版で構成するよ
うにしており、拡幅に伴う死荷重をコンクリート床版等
に比べて小さくできるようにしている。
According to this method of widening the end of an existing bridge, the road surface at the end including the widened portion of the existing bridge is made of a steel slab, and a dead load accompanying the widening is applied to a concrete slab or the like. We can make it smaller.
【0015】さらに、この発明の請求項5記載の既設橋
の端部拡幅方法は、請求項1〜4のいずれかに記載の構
成に加え、前記拡幅用下弦材や前記補強用部材を箱形構
造材で構成したことを特徴とするものである。
According to a fifth aspect of the present invention, there is provided a method for widening an end portion of an existing bridge, wherein the wide chord member and the reinforcing member are box-shaped in addition to any one of the first to fourth aspects. It is characterized by comprising a structural material.
【0016】この既設橋の端部拡幅方法によれば、前記
拡幅用下弦材や前記補強用部材を箱形構造材で構成する
ようにしており、拡幅に伴う死荷重をできるだけ小さく
するようにしている。
According to this method of widening the end of an existing bridge, the lower chord material for widening and the reinforcing member are made of a box-shaped structural material so that the dead load accompanying widening is minimized. I have.
【0017】[0017]
【発明の実施の形態】以下、この発明の一実施の形態に
ついて図面に基づき詳細に説明する。図1および図2は
この発明の既設橋の端部拡幅方法を下路トラス橋に適用
して右折車線を拡幅する場合の一実施の形態にかかり、
図1は前半の2工程を示す概略斜視図、図2は後半の2
工程を示す概略斜視図である。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings. 1 and 2 show an embodiment in which the right-turn lane is widened by applying the method for widening the end of an existing bridge of the present invention to a lower truss bridge,
FIG. 1 is a schematic perspective view showing the first two steps, and FIG.
It is a schematic perspective view which shows a process.
【0018】この既設橋の端部拡幅方法が適用される下
路トラス橋1は、例えばプラットトラスで構成され、主
構10が下弦材11と、上弦材12と、これら連結する
斜材13および垂直材14とで構成され、左右の主構1
0同士が橋門構15および床桁16と、上横構17とで
連結されて構成されている。そして、下路トラス橋1の
両端部がそれぞれ橋台18の橋座上に支持されるととも
に、橋長に応じて中間部に橋脚が設けられて支持されて
おり、路面として、例えばコンクリート床版が設けられ
る。
The lower truss bridge 1 to which the end widening method of the existing bridge is applied is composed of, for example, a plat truss, and the main structure 10 includes a lower chord member 11, an upper chord member 12, and a diagonal member 13 connecting these members. The right and left main structures 1 are composed of vertical members 14.
0 are connected to each other by a bridge structure 15 and a floor girder 16 and an upper horizontal structure 17. Both ends of the lower truss bridge 1 are supported on the bridge seat of the abutment 18, respectively, and a pier is provided and supported at an intermediate portion according to the bridge length. As a road surface, for example, a concrete floor slab is used. Provided.
【0019】このような下路トラス橋1の端部、すなわ
ち右折車線を必要とする橋部分Lを拡幅するため、図1
(a)に示すように、拡幅先端部(図中の左端部)に位
置する橋台18を1車線分拡げて外側に橋台拡幅部21
を構築する。この外側に拡げる橋台拡幅部21は既設の
橋台18と連結した一体構造としても、独立した橋台拡
幅部21のいずれであっても良く、拡幅後の下路トラス
橋20の荷重を支持できる構造であれば良い。
In order to widen the end of the lower truss bridge 1, that is, the bridge portion L that requires a right turn lane, FIG.
As shown in (a), the abutment 18 located at the leading end of the widening (the left end in the figure) is expanded by one lane and the abutment widening portion 21 is extended outward.
To build. The abutment widening portion 21 expanding to the outside may be either an integrated structure connected to the existing abutment 18 or an independent abutment widening portion 21 and has a structure capable of supporting the load of the lower truss bridge 20 after widening. I just want it.
【0020】なお、橋台18自体に車線を拡幅できる余
裕があり、強度上の問題がなくそのままで拡幅部を支持
できる構造である場合には、橋台拡幅部21を構築する
こと無く、橋台18の外側部分などを利用するようにし
ても良い。
If the abutment 18 itself has room to widen the lane and has a structure capable of supporting the widened portion without any problem in strength, the abutment 18 can be supported without constructing the abutment widened portion 21. An outer portion or the like may be used.
【0021】こうして橋台拡幅部21を拡幅先端部に構
築した後、図1(b)に示すように、拡幅基端部となる
下路トラス橋1の下弦材11から枝桁22を外側に突き
出して連結し、この枝桁22と橋台拡幅部21の外側端
との間に拡幅用下弦材23を掛け渡す。
After the abutment widening portion 21 is constructed at the widening end portion in this way, as shown in FIG. 1B, the branch girder 22 is projected outward from the lower chord material 11 of the lower truss bridge 1 serving as the widening base end. Then, the lower chord member 23 for widening is bridged between the branch girder 22 and the outer end of the abutment widening portion 21.
【0022】次に、この拡幅用下弦材23上に、図2
(a)に示すように、拡幅用トラスの主構となる拡幅用
主構24を構成する補強部材として拡幅用斜材25およ
び拡幅用垂直材26を連結するとともに、拡幅用上弦材
27を連結して拡幅用主構24を構築する。
Next, on this widening lower chord material 23, FIG.
As shown in (a), the widening diagonal member 25 and the widening vertical member 26 are connected as reinforcing members constituting the widening main structure 24 which is the main structure of the widening truss, and the widening upper chord member 27 is connected. Then, the widening main structure 24 is constructed.
【0023】この拡幅用主構24は、予め工場などで組
み立てたものを運搬して設置するようにしたり、ブロッ
ク化したものや個々の部材を現場で組み立てる場合のい
ずれでも良く、運搬経路等や現場の状況等に応じて選択
すれば良い。
The widening main structure 24 may be used for transporting and installing components assembled in advance in a factory or the like, or may be used for assembling blocks or individual members on site. What is necessary is just to select according to the situation of a spot, etc.
【0024】こうして拡幅用主構24が構築された後、
隣接する既設橋1の主構10と連結するため、図2
(b)に示すように、床桁16を延長して拡幅用床桁2
8で連結するとともに、拡幅用橋門構29および拡幅用
上横構30で連結する。
After the widening main structure 24 is thus constructed,
To connect with the main structure 10 of the adjacent existing bridge 1, FIG.
As shown in (b), the floor girder 16 is extended to extend the floor girder 2 for widening.
8 and the bridge structure 29 for widening and the upper horizontal structure 30 for widening.
【0025】こうして拡幅用主構24が連結された後、
交通の支障となる中央部の主構10の斜材13および垂
直材14、さらに橋門構15の形状によっては交通の支
障となる部分を切断等で除去する。
After the widening main structure 24 is connected in this manner,
Depending on the shape of the diagonal member 13 and the vertical member 14 of the main structure 10 in the central part, which obstructs traffic, and also the shape of the bridge structure 15, a part obstructing traffic is removed by cutting or the like.
【0026】この後、拡幅された部分を含む端部1aの
路面をこれまでのコンクリート床版に代え、鋼床版31
とし、拡幅に伴う死荷重の増大を極力抑えるようにす
る。
Thereafter, the road surface at the end 1a including the widened portion is replaced with the conventional concrete slab, and the steel slab 31 is used.
The dead load increase accompanying the widening is suppressed as much as possible.
【0027】こうして拡幅された下路トラス橋20で
は、端部1aの片側を2車線として右折車線を設けるこ
とができ、右折車による渋滞を防止することができるよ
うになる。
In the widened lower truss bridge 20, a right turn lane can be provided with one side of the end 1a as two lanes, and congestion due to a right turn vehicle can be prevented.
【0028】このような既設橋の端部拡幅方法によれ
ば、拡幅用主構24を構築する間は、既設橋1上で作業
する必要がほとんど無く、外側での作業となり、交通を
遮断する必要がほとんど無く使用状態のまま拡幅するこ
とができる。
According to the method for widening the end of the existing bridge, there is almost no need to work on the existing bridge 1 during construction of the widening main structure 24, and work outside is performed, so that traffic is cut off. There is almost no need to expand the width in use.
【0029】また、拡幅するための部材が少なく、橋の
架け替えなどに比べ大幅にコスト低減を図ることができ
る。
Further, the number of members for widening is small, and the cost can be significantly reduced as compared with the replacement of a bridge.
【0030】さらに、拡幅した部分を含む端部全体の路
面を鋼床版31として拡幅に伴う自重増大を極力抑える
ことで、橋台拡幅部21の構築も容易となる。
Furthermore, the abutment widening portion 21 can be easily constructed by minimizing the increase in its own weight due to the widening of the road surface of the entire end including the widened portion as the steel floor slab 31.
【0031】また、拡幅部を構成する部材、例えば拡幅
用主構24、拡幅用床桁28、拡幅用橋門構29、拡幅
用上横構30を中実材でなく、箱形構造材とすること
で、必要な強度を確保しつつ軽量化を図ることができ、
一層死荷重の低減を図ることができる。
The members constituting the widening portion, for example, the main structure 24 for widening, the floor girder 28 for widening, the bridge structure 29 for widening, and the upper horizontal structure 30 for widening are formed of a box-shaped structural material instead of a solid material. By doing so, it is possible to reduce the weight while securing the required strength,
The dead load can be further reduced.
【0032】なお、上記実施の形態では、下路トラス橋
に適用した場合で説明したが、これに限らず、他の構造
の既設橋にも適用することができる。
In the above embodiment, the case where the present invention is applied to a lower truss bridge has been described. However, the present invention is not limited to this and can be applied to an existing bridge having another structure.
【0033】[0033]
【発明の効果】以上、一実施の形態とともに具体的に説
明したようにこの発明の請求項1記載の既設橋の端部拡
幅方法によれば、既設橋の端部を少なくとも1車線分拡
幅するに際し、既設橋の端部を支持する橋台部を拡幅部
に対応して支持可能とし、この拡幅部を支持可能な橋台
部と前記既設橋の拡幅基端部との間に拡幅用下弦材を架
け渡し、この拡幅用下弦材と前記既設橋との間に補強用
部材を設けて補強した後、交通の支障となる前記既設橋
の部材を除去するようにしたので、既設橋の橋台部で拡
幅部を支持できるようにし、これに拡幅用下弦材を支持
して補強用部材で補強することで、既設橋上での作業を
無くし、使用状態のまま拡幅することができる。
According to the method for widening the end of an existing bridge according to the first aspect of the present invention, the end of the existing bridge is widened by at least one lane. At this time, the abutment supporting the end of the existing bridge can be supported corresponding to the widened portion, and a lower chord material for widening is provided between the abutment capable of supporting the widened portion and the widened base end of the existing bridge. After bridging and providing a reinforcing member between the lower chord for widening and the existing bridge to reinforce, the members of the existing bridge that hinder traffic are removed, so that the abutment portion of the existing bridge is used. The widened portion can be supported, and the widened lower chord material is supported on the widened portion and reinforced with the reinforcing member, so that the work on the existing bridge can be eliminated, and the widened portion can be widened in a used state.
【0034】また、この発明の請求項2記載の既設橋の
端部拡幅方法によれば、前記既設橋の端部を支持する前
記橋台部を拡げて橋台拡幅部を構築して前記拡幅部に対
応して支持可能としたので、既設橋の外側に橋台拡幅部
を構築し、これに拡幅用下弦材を支持して補強用部材で
補強することで、既設橋上での作業を無くし、使用状態
のまま拡幅することができる。
According to the method for widening the end of an existing bridge according to a second aspect of the present invention, the abutment supporting the end of the existing bridge is expanded to form an abutment widening part, and the widening part is constructed. Since it was possible to support it, an abutment widening part was constructed outside the existing bridge, and the lower chord material for widening was supported on it and reinforced with reinforcing members, eliminating work on the existing bridge and using it It can be widened as it is.
【0035】さらに、この発明の請求項3記載の既設橋
の端部拡幅方法によれば、前記既設橋を下路トラス橋と
し、前記補強用部材をトラス構造として補強する一方、
交通の支障となる当該下路トラス橋の橋門構や垂直材や
斜材を除去するようにしたので、下路トラス橋であって
も補強用部材をトラス構造とすることで、トラス橋とし
たまま拡幅することができる。
Further, according to the method for widening the end of an existing bridge according to a third aspect of the present invention, the existing bridge is a lower truss bridge, and the reinforcing member is reinforced by a truss structure.
The truss bridge and the vertical and diagonal members of the lower truss bridge, which are obstacles to traffic, are removed. It can be widened while keeping it.
【0036】また、この発明の請求項4記載の既設橋の
端部拡幅方法によれば、前記既設橋の拡幅部を含む端部
の路面を鋼床版で構成するようにしたので、拡幅に伴う
死荷重をコンクリート床版等に比べて小さくすることが
できる。
According to the method for widening the end of an existing bridge according to a fourth aspect of the present invention, since the road surface at the end including the widened portion of the existing bridge is formed of a steel deck, The accompanying dead load can be reduced as compared with a concrete slab or the like.
【0037】さらに、この発明の請求項5記載の既設橋
の端部拡幅方法によれば、前記拡幅用下弦材や前記補強
用部材を箱形構造材で構成するようにしたので、拡幅に
伴う死荷重をできるだけ小さくすることができる。
Further, according to the method for widening the end of an existing bridge according to claim 5 of the present invention, the lower chord material for widening and the reinforcing member are formed of a box-shaped structural material. Dead load can be minimized.
【図面の簡単な説明】[Brief description of the drawings]
【図1】この発明の既設橋の端部拡幅方法を下路トラス
橋に適用して右折車線を拡幅する場合の一実施の形態に
かかる前半の2工程を示す概略斜視図である。
FIG. 1 is a schematic perspective view showing the first two steps according to an embodiment of widening a right turn lane by applying an end widening method of an existing bridge according to the present invention to a lower truss bridge.
【図2】この発明の既設橋の端部拡幅方法を下路トラス
橋に適用して右折車線を拡幅する場合の一実施の形態に
かかる後半の2工程を示す概略斜視図である。
FIG. 2 is a schematic perspective view showing the latter two steps according to an embodiment in the case where the method for widening the end of an existing bridge of the present invention is applied to a lower truss bridge to widen a right-turn lane.
【図3】この発明が適用される既設橋の概略正面図およ
び路面の概略平面図である。
FIG. 3 is a schematic front view of an existing bridge to which the present invention is applied and a schematic plan view of a road surface.
【符号の説明】[Explanation of symbols]
1 下路トラス橋 1a 端部 10 主構 11 下弦材 12 上弦材 13 斜材 14 垂直材 15 橋門構 16 床桁 17 上横構 18 橋台 20 拡幅後の下路トラス橋 21 橋台拡幅部 22 枝桁 23 拡幅用下弦材 24 拡幅用主構 25 拡幅用斜材 26 拡幅用垂直材 27 拡幅用上弦材 28 拡幅用床桁 29 拡幅用橋門構 30 拡幅用上横構 31 鋼床版 L 拡幅必要部分(端部) DESCRIPTION OF SYMBOLS 1 Lower truss bridge 1a End part 10 Main structure 11 Lower chord material 12 Upper chord material 13 Diagonal material 14 Vertical material 15 Bridge gate 16 Floor girder 17 Upper horizontal structure 18 Abutment 20 Lower truss bridge after widening 21 Abutment widening part 22 Branch Girder 23 Wider lower chord material 24 Widening main structure 25 Wider diagonal material 26 Wider vertical material 27 Wider upper chord material 28 Wider floor girder 29 Wider bridge structure 30 Wider upper horizontal structure 31 Steel slab L Widening required Part (end)
───────────────────────────────────────────────────── フロントページの続き (72)発明者 杉崎 守 東京都江東区東陽五丁目30番13号 株式会 社イスミック内 Fターム(参考) 2D059 AA01 BB33 GG39 GG55  ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Mamoru Sugisaki 5-30-13, Toyo, Koto-ku, Tokyo F-term in Ismic Co., Ltd. 2D059 AA01 BB33 GG39 GG55

Claims (5)

    【特許請求の範囲】[Claims]
  1. 【請求項1】 既設橋の端部を少なくとも1車線分拡幅
    するに際し、既設橋の端部を支持する橋台部を拡幅部に
    対応して支持可能とし、この拡幅部を支持可能な橋台部
    と前記既設橋の拡幅基端部との間に拡幅用下弦材を架け
    渡し、この拡幅用下弦材と前記既設橋との間に補強用部
    材を設けて補強した後、交通の支障となる前記既設橋の
    部材を除去するようにしたことを特徴とする既設橋の端
    部拡幅方法。
    When widening the end of an existing bridge by at least one lane, an abutment supporting the end of the existing bridge can be supported corresponding to the widened portion, and an abutment capable of supporting the widened portion is provided. After extending the lower chord material for widening between the base end of the widening of the existing bridge and providing a reinforcing member between the lower chord material for widening and the existing bridge, the existing bridge which becomes a hindrance to traffic is provided. A method for widening an end of an existing bridge, wherein a member of the bridge is removed.
  2. 【請求項2】 前記既設橋の端部を支持する前記橋台部
    を拡げて橋台拡幅部を構築して前記拡幅部に対応して支
    持可能としたことを特徴とする請求項1記載の既設橋の
    端部拡幅方法。
    2. The existing bridge according to claim 1, wherein the abutment supporting the end of the existing bridge is expanded to form an abutment widened portion and can be supported corresponding to the widened portion. End widening method.
  3. 【請求項3】 前記既設橋を下路トラス橋とし、前記補
    強用部材をトラス構造として補強する一方、交通の支障
    となる当該下路トラス橋の橋門構や垂直材や斜材を除去
    するようにしたことを特徴とする請求項1または2記載
    の既設橋の端部拡幅方法。
    3. The existing bridge is a lower truss bridge, and the reinforcing member is reinforced by a truss structure, while removing a bridge structure, a vertical member, and a diagonal member of the lower truss bridge that hinder traffic. 3. The method for widening an end of an existing bridge according to claim 1, wherein the width of the end is increased.
  4. 【請求項4】 前記既設橋の拡幅部を含む端部の路面を
    鋼床版で構成したことを特徴とする請求項1〜3のいず
    れかに記載の既設橋の端部拡幅方法。
    4. The method for widening an end of an existing bridge according to claim 1, wherein the road surface at the end including the widened portion of the existing bridge is formed of a steel slab.
  5. 【請求項5】 前記拡幅用下弦材や前記補強用部材を箱
    形構造材で構成したことを特徴とする請求項1〜4のい
    ずれかに記載の既設橋の端部拡幅方法。
    5. The method of widening an end of an existing bridge according to claim 1, wherein the lower chord material for widening and the reinforcing member are formed of a box-shaped structural material.
JP2001029499A 2001-02-06 2001-02-06 End section widening method for existing bridge Pending JP2002227131A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2001029499A JP2002227131A (en) 2001-02-06 2001-02-06 End section widening method for existing bridge

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2001029499A JP2002227131A (en) 2001-02-06 2001-02-06 End section widening method for existing bridge

Publications (1)

Publication Number Publication Date
JP2002227131A true JP2002227131A (en) 2002-08-14

Family

ID=18893842

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2001029499A Pending JP2002227131A (en) 2001-02-06 2001-02-06 End section widening method for existing bridge

Country Status (1)

Country Link
JP (1) JP2002227131A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007321473A (en) * 2006-06-01 2007-12-13 Mitsubishi Heavy Industries Bridge & Steel Structures Engineering Co Ltd Rebuilding method for bridge
CN103290785A (en) * 2013-06-30 2013-09-11 中铁一局集团有限公司 Closure method for height variable continuous steel truss girder
CN104929053A (en) * 2015-07-03 2015-09-23 金少平 Connecting box for rhombic construction frame

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007321473A (en) * 2006-06-01 2007-12-13 Mitsubishi Heavy Industries Bridge & Steel Structures Engineering Co Ltd Rebuilding method for bridge
JP4671912B2 (en) * 2006-06-01 2011-04-20 三菱重工鉄構エンジニアリング株式会社 Bridge replacement method
CN103290785A (en) * 2013-06-30 2013-09-11 中铁一局集团有限公司 Closure method for height variable continuous steel truss girder
CN103290785B (en) * 2013-06-30 2015-07-01 中铁一局集团有限公司 Closure method for height variable continuous steel truss girder
CN104929053A (en) * 2015-07-03 2015-09-23 金少平 Connecting box for rhombic construction frame

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