JP2508677B2 - Reinforcement method of bridge reinforced concrete slab - Google Patents
Reinforcement method of bridge reinforced concrete slabInfo
- Publication number
- JP2508677B2 JP2508677B2 JP62002935A JP293587A JP2508677B2 JP 2508677 B2 JP2508677 B2 JP 2508677B2 JP 62002935 A JP62002935 A JP 62002935A JP 293587 A JP293587 A JP 293587A JP 2508677 B2 JP2508677 B2 JP 2508677B2
- Authority
- JP
- Japan
- Prior art keywords
- floor slab
- reinforced concrete
- concrete floor
- steel
- reinforcing
- 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.)
- Expired - Lifetime
Links
Landscapes
- Bridges Or Land Bridges (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は、橋梁鉄筋コンクリート床版の補強方法に関
するものである。TECHNICAL FIELD The present invention relates to a method of reinforcing a bridge reinforced concrete floor slab.
［従来の技術］ 橋梁等を形成する鉄筋コンクリート床版は、長期間の
使用により老朽化して内部に亀裂を生ずるため、補強す
る必要がある。[Prior Art] Reinforced concrete slabs that form bridges, etc., must be reinforced because they deteriorate over a long period of time and cause internal cracks.
従来の橋梁鉄筋コンクリート床版の補強方法を第３図
及び第４図により説明する。A conventional method of reinforcing a bridge reinforced concrete floor slab will be described with reference to FIGS. 3 and 4.
第３図は、鋼板接着による橋梁鉄筋コンクリート床版
の補強方法の説明図である。FIG. 3 is an explanatory view of a method for reinforcing a bridge reinforced concrete floor slab by bonding steel plates.
所要間隔を置いて複数配置した橋軸方向へ延びるＩ型
鋼から成る主桁１上に鉄筋コンクリート床版２を構築
し、鉄筋コンクリート床版２上にアスファルト３を敷設
して成る橋梁が老朽化して、内部に亀裂４が生じた場
合、鉄筋コンクリート床版２に対し、鉄筋コンクリート
床版２の下面に橋軸方向へ延びる鋼板５をエポキシ樹脂
系の接着剤等を用いて接着し、或いは更に、アンカーボ
ルト６をエポキシ樹脂系の接着剤等を用いて鉄筋コンク
リート床版２内部に埋め込む。A bridge made by constructing a reinforced concrete floor slab 2 on a main girder 1 made of I-shaped steel extending in the axial direction of the bridge arranged at required intervals and laying an asphalt 3 on the reinforced concrete floor slab 2 is aging and When a crack 4 occurs in the reinforced concrete floor slab 2, a steel plate 5 extending in the bridge axis direction is bonded to the lower surface of the reinforced concrete floor slab 2 by using an epoxy resin adhesive or the like, or an anchor bolt 6 is further attached. It is embedded in the reinforced concrete floor slab 2 using an epoxy resin adhesive or the like.
このように鋼板５を下面に接着することにより、鉄筋
コンクリート床版２は補強される。By adhering the steel plate 5 to the lower surface in this manner, the reinforced concrete floor slab 2 is reinforced.
第４図は、鋼板５に替え、Ｉ型鋼７を主桁１の中間位
置で且つ橋軸方向へ向け配設して鉄筋コンクリート床版
２を下面から部分的に支持補強し、Ｉ型鋼７と主桁１間
に橋軸方向と直角方向へ延びるサポート材８を溶接し或
いはＩ型鋼７及び主桁１に取り付けたブラケット９にボ
ルト10で止めてＩ型鋼７を接続、固定した縦桁補強法の
説明図である。FIG. 4 shows that, instead of the steel plate 5, an I type steel 7 is arranged at an intermediate position of the main girder 1 and in the bridge axial direction to partially support and reinforce the reinforced concrete floor slab 2 from the lower surface. A support member 8 extending in the direction perpendicular to the bridge axis direction is welded between the girders 1 or fixed to the bracket 9 attached to the I-shaped steel 7 and the main girder 1 with bolts 10 to connect and fix the I-shaped steel 7. FIG.
このようにＩ型鋼７で主桁１の中間位置を下面から部
分的に支持することにより、鉄筋コンクリート床版２は
補強される。In this way, the reinforced concrete floor slab 2 is reinforced by partially supporting the intermediate position of the main girder 1 from the lower surface with the I-shaped steel 7.
［発明が解決しようとする問題点］ しかしながら、上記従来の橋梁鉄筋コンクリート床版
の補強方法では、補強後の強度を鉄筋コンクリート床版
２自体の強度に依存するようにしているため、橋梁の老
朽化が更に進むと、例えば、第３図の鋼板接着方法で
は、鉄筋コンクリート床版２の脆弱化と共に鋼板５がは
がれたり、或いは、鋼板５の側端部分の鉄筋コンクリー
ト床版２内部に亀裂（図中亀裂ａ）が生じ鋼板５ごとに
鉄筋コンクリート床版２が脱落する畏れがあり、第４図
の縦桁補強法では、主桁１とＩ型鋼７の中間部に亀裂
（図中亀裂ｂ）が生じて該部分の鉄筋コンクリート床版
２が陥没する畏れがある。[Problems to be Solved by the Invention] However, in the above-described conventional method for reinforcing a bridge reinforced concrete floor slab, since the strength after reinforcement depends on the strength of the reinforced concrete floor slab 2 itself, deterioration of the bridge may occur. Further progressing, for example, in the steel plate bonding method shown in FIG. 3, the steel plate 5 is peeled off along with the weakening of the reinforced concrete floor slab 2, or a crack (a crack a in the drawing a in the figure) inside the reinforced concrete floor slab 2 at the side end portion of the steel plate 5. ) Occurs, and there is a fear that the reinforced concrete floor slab 2 falls off for each steel plate 5, and in the longitudinal girder reinforcement method of FIG. 4, a crack (crack b in the figure) occurs in the intermediate portion between the main girder 1 and the I-type steel 7, There is a fear that the part of the reinforced concrete floor slab 2 will be depressed.
従って、鋼板接着或いは縦桁補強法も根本的な補強手
段ではなく、上記補強法の施工後に鉄筋コンクリート床
版２の老朽化が更に進んだときには、鉄筋コンクリート
床版２は張替えねばならない。又張替工事は交通を遮断
して行う必要があるため、近年の交通事情を考えた場合
に重要な問題となる。Therefore, the steel plate bonding or the longitudinal girder reinforcement method is not a fundamental reinforcement means, and when the reinforced concrete floor slab 2 is further deteriorated after the above reinforcement method is applied, the reinforced concrete floor slab 2 must be replaced. Also, since the replacement work needs to be performed with the traffic blocked, it becomes an important issue when considering recent traffic conditions.
本発明は上述の実情に鑑み、鉄筋コンクリート床版の
全面を下面から支持可能な鋼床版を主桁に取り付けるこ
とにより鉄筋コンクリート床版の張替えを不要とするこ
とができるようした橋梁鉄筋コンクリート床版の補強方
法を提供することを目的とするものである。In view of the above situation, the present invention is to reinforce the bridge reinforced concrete floor slab so that it is not necessary to replace the reinforced concrete floor slab by attaching a steel floor slab capable of supporting the entire surface of the reinforced concrete floor slab to the main girder. It is intended to provide a method.
［問題点を解決するための手段］ 本発明は、鉄筋コンクリート床版下面のほぼ全面を覆
い得る形状をした補強鋼板を、格子状に組んだ補強強鋼
と縦補強リブによって支持補強して高い曲げ鋼性を有す
る鋼床版を形成すると共に、鉄筋コンクリート床版を支
持する主桁における、隣接する主桁の上端間を、上記高
い曲げ剛性を有する鋼床版で連結することにより、各主
桁を一体化させると共に、鋼床版の上面を構成する前記
補強鋼板により鉄筋コンクリート床版下面のほぼ全面を
下方から直接支持させることを特徴とする橋梁鉄筋コン
クリート床版の補強方法にかかるものである。[Means for Solving the Problems] The present invention provides high bending by supporting and reinforcing a reinforcing steel plate having a shape capable of covering almost the entire lower surface of a reinforced concrete floor slab with reinforcing strong steel and vertical reinforcing ribs assembled in a grid pattern. While forming a steel deck with steel properties, in the main girder supporting the reinforced concrete floor slab, by connecting the upper ends of adjacent main girders with the steel deck having the high bending rigidity, each main girder is A reinforcing method of a bridge reinforced concrete floor slab is characterized in that almost the entire lower surface of the reinforced concrete floor slab is supported directly from below by the reinforcing steel plate constituting the upper surface of the steel floor slab.
［作用］ 従って本発明では、鉄筋コンクリート床版を、鉄筋コ
ンクリート床版の下面の全面をほぼ覆うように当接配置
した高い剛性を有する鋼床板で直接支持させ、且つ、鋼
床版で主桁間を連結させるようにしているため、鉄筋コ
ンクリート床版が老朽化した場合でも鉄筋コンクリート
床版の脱落は防止される。[Operation] Therefore, in the present invention, the reinforced concrete floor slab is directly supported by the steel floor plate having a high rigidity that is disposed so as to abut so as to substantially cover the entire lower surface of the reinforced concrete floor slab, and the main girder space between the steel floor slabs is set. Since they are connected, even if the reinforced concrete floor slab is deteriorated, the reinforced concrete floor slab is prevented from falling off.
［実 施 例］ 以下、本発明の実施例を図面を参照して説明する。[Examples] Examples of the present invention will be described below with reference to the drawings.
第１図及び第２図は、本発明の一実施例の説明図であ
る。1 and 2 are explanatory views of an embodiment of the present invention.
本発明では、鉄筋コンクリート床版２下面のコンクリ
ート露出部分全面を、ブロック化した鋼床版11で覆い、
該鋼床床版11を主桁１に接合する。In the present invention, the entire exposed concrete portion of the lower surface of the reinforced concrete floor slab 2 is covered with a blocked steel floor slab 11,
The steel deck slab 11 is joined to the main girder 1.
上記鋼床床版11は、以下の如く構成されている。 The steel floor slab 11 is configured as follows.
即ち、鉄筋コンクリート床版２下面のコンクリート露
出部分と同形状に形成され、且つ、橋横方向へ延びる縦
補強リブ12を所要間隔を置いて複数取付けられた補強鋼
版13を用いて、各主桁1,1間の鉄筋コンクリート床版２
下面のコンクリート露出部分を橋軸方向全面に渉って覆
う。That is, each main girder is formed by using a reinforcing steel plate 13 which is formed in the same shape as the exposed concrete portion on the lower surface of the reinforced concrete floor slab 2 and in which a plurality of vertical reinforcing ribs 12 extending in the bridge lateral direction are attached at required intervals. Reinforced concrete floor slab between 1 and 1 2
Cover the exposed concrete part of the lower surface across the entire bridge axis direction.
橋軸方向と直角方向へ延び補強鋼板13下面に当接する
と共に縦補強リブ12に嵌合する上端14を有し、且つ、主
桁１との接合部を形成する両端15を有する逆Ｔ字状をし
た横補強鋼16を、橋軸方向へ所要間隔を置き複数設けて
前記補強鋼板13下面を一体的に支持し、横補強鋼16の両
端15を主桁１に直接溶接若しくは主桁１に設けたブラケ
ット17にボルト18で止めて固定する。An inverted T-shape having an upper end 14 that extends in the direction orthogonal to the bridge axis direction and that abuts the lower surface of the reinforcing steel plate 13 and that fits into the vertical reinforcing ribs 12, and that has both ends 15 that form a joint with the main girder 1. A plurality of horizontal reinforcing steels 16 having the above-mentioned structure are provided at required intervals in the bridge axis direction to integrally support the lower surface of the reinforcing steel plate 13, and both ends 15 of the horizontal reinforcing steel 16 are directly welded to the main girder 1 or to the main girder 1. It is fixed by fixing it to the provided bracket 17 with bolts 18.
このように鉄筋コンクリート床版２の下に、補強鋼板
13を、格子状に組んだ縦補強リブ12と横補強鋼16で支持
して成る高い曲げ剛性を有する鋼床版11を設け、鋼床版
11の各横補強鋼16を主桁１に取り付けたことにより、鉄
筋コンクリート床版２は鋼床版11上に積置されることに
なり、鉄筋コンクリート床版２自体に強度がなくても鉄
筋コンクリート床版２は鋼床版11と主桁１によって支持
される。In this way, under the reinforced concrete floor slab 2, a reinforcing steel plate
A steel floor slab 11 having a high bending rigidity is formed by supporting 13 with vertical reinforcing ribs 12 and lateral reinforcing steel 16 assembled in a grid pattern.
By attaching each horizontal reinforcing steel 16 of 11 to the main girder 1, the reinforced concrete floor slab 2 is stacked on the steel floor slab 11, and even if the reinforced concrete floor slab 2 itself does not have strength, the reinforced concrete floor slab 2 is supported by steel deck 11 and main girder 1.
従って、鉄筋コンクリート床版２は老朽化した場合で
も脱落しないので、張替える必要がなくなり、補修は亀
裂により生じた隙間を埋める程度で済む。Therefore, since the reinforced concrete floor slab 2 does not fall off even when it is deteriorated, it is not necessary to re-cover it, and repairing can be performed only by filling the gap created by the crack.
又、鉄筋コンクリート床版２に荷重が作用すると、鋼
床版11がその高い曲げ剛性で荷重に抵抗すると共に、荷
重が各横補強鋼16を介して各主桁１へと分配されること
となるので、特定の主桁１に応力が集中するのを防止す
ることができる。Further, when a load acts on the reinforced concrete floor slab 2, the steel floor slab 11 resists the load due to its high bending rigidity, and the load is distributed to each main girder 1 through each lateral reinforcing steel 16. Therefore, it is possible to prevent stress from concentrating on the specific main girder 1.
尚、本発明は上述の実施例に限定されるものでなく、
コンクリート床版と鋼床版との間に間隙が生じた場合に
は間隙にセメントグラウトやエポキシグラウトなどを充
填しても良いこと、その他、本発明の要旨を逸脱しない
範囲内で種々変更を加え得ることは勿論である。Note that the present invention is not limited to the above-described embodiment,
When a gap occurs between the concrete floor slab and the steel floor slab, the gap may be filled with cement grout or epoxy grout, and other various changes are made within the scope not departing from the gist of the present invention. Of course you can get it.
［発明の効果］ 上記したように、本発明の橋梁鉄筋コンクリート床版
の補強方法によれば、鉄筋コンクリート床版下面のほぼ
全面を覆い得る形状をした補強鋼板を、格子状に組んだ
補強強鋼と縦補強リブによって支持補強して高い曲げ剛
性を有する鋼床版を形成すると共に、鉄筋コンクリート
床版を支持する主桁における、隣接する主桁の上端間
を、上記高い曲げ剛性を有する鋼床版で連結することに
より、各主桁を一体化させると共に、鋼床版の上面を構
成する前記補強鋼版により鉄筋コンクリート床版下面の
ほぼ全面を下方から直接支持させているため、鉄筋コン
クリート床版に荷重が作用した時に、鋼床版が格子状の
補強部材などによる高い曲げ剛性によって荷重に抵抗す
るため鉄筋コンクリート床版の撓みが鋼床版を設ける前
の1/5〜1/6にまで軽減され鉄筋コンクリート床版の負担
を大幅に軽減させることができるようになると共に、荷
重が各鋼床版を介して各主桁へと分配されることとなる
ので、特定の主桁に応力が集中するのを防止することが
でき、同時に、鉄筋コンクリート床版を鋼床版で直接支
持させることにより、鉄筋コンクリート床版は老朽化し
た場合でも損壊或いは脱落することがなく、従って、交
通を遮断しての床版の張替えを行う必要がなくなる等の
種々の優れた効果を奏し得る。[Effect of the Invention] As described above, according to the method for reinforcing a bridge reinforced concrete floor slab of the present invention, a reinforcing steel plate having a shape capable of covering almost the entire lower surface of the reinforced concrete floor slab is reinforced with a grid-like reinforcing steel. A steel deck having a high bending rigidity is formed by supporting and reinforcing the longitudinal reinforcing ribs to form a steel deck having a high bending rigidity, and between the upper ends of adjacent main girders in the main girder supporting the reinforced concrete deck. By connecting, each main girder is integrated, and since almost the entire lower surface of the reinforced concrete floor slab is directly supported from below by the reinforcing steel plate that constitutes the upper surface of the steel floor slab, the load is applied to the reinforced concrete floor slab. When it acts, the steel deck will resist the load due to the high bending rigidity due to the grid-shaped reinforcing member, etc. The load on the reinforced concrete floor slab can be greatly reduced by 1/6 and the load is distributed to each main girder through each steel floor slab. It is possible to prevent stress concentration on the girder, and at the same time, by supporting the reinforced concrete floor slab directly with the steel floor slab, the reinforced concrete floor slab will not be damaged or fallen even when it is deteriorated, and therefore, the transportation It is possible to achieve various excellent effects, such as eliminating the need to cut off the floor to replace the floor slab.
第１図は本発明の一実施例の説明図、第２図は第１図の
II−II矢視図、第３図は従来例の説明図、第４図は他の
従来例の説明図である。 図中、１は主桁、２は鉄筋コンクリート床版、11は鋼床
版を示す。FIG. 1 is an explanatory view of an embodiment of the present invention, and FIG. 2 is a view of FIG.
II-II arrow view, FIG. 3 is an explanatory view of a conventional example, and FIG. 4 is an explanatory view of another conventional example. In the figure, 1 is a main girder, 2 is a reinforced concrete slab, and 11 is a steel slab.
Claims (1)
い得る形状をした補強鋼板を、格子状に組んだ補強強鋼
と縦補強リブによって支持補強して高い曲げ剛性を有す
る鋼床版を形成すると共に、鉄筋コンクリート床版を支
持する主桁における、隣接する主桁の上端間を、上記高
い曲げ剛性を有する鋼床版で連結することにより、各主
桁を一体化させると共に、鋼床版の上面を構成する前記
補強鋼板により鉄筋コンクリート床版下面のほぼ全面を
下方から直接支持させることを特徴とする橋梁鉄筋コン
クリート床版の補強方法。1. A steel floor slab having high bending rigidity is obtained by supporting and reinforcing a reinforcing steel plate having a shape capable of covering substantially the entire lower surface of a reinforced concrete floor slab with reinforcing strong steel and vertical reinforcing ribs assembled in a grid pattern. In addition, in the main girder supporting the reinforced concrete floor slab, by connecting the upper ends of adjacent main girders with the steel deck having the above-mentioned high bending rigidity, the respective main girders are integrated and the upper surface of the steel deck A reinforcing method for a bridge reinforced concrete floor slab, wherein almost the entire lower surface of the reinforced concrete floor slab is directly supported from below by the reinforcing steel plate constituting the above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62002935A JP2508677B2 (en) | 1987-01-09 | 1987-01-09 | Reinforcement method of bridge reinforced concrete slab |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62002935A JP2508677B2 (en) | 1987-01-09 | 1987-01-09 | Reinforcement method of bridge reinforced concrete slab |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63171906A JPS63171906A (en) | 1988-07-15 |
| JP2508677B2 true JP2508677B2 (en) | 1996-06-19 |
Family
ID=11543209
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62002935A Expired - Lifetime JP2508677B2 (en) | 1987-01-09 | 1987-01-09 | Reinforcement method of bridge reinforced concrete slab |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2508677B2 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2645445B2 (en) * | 1988-03-17 | 1997-08-25 | 義之 大串 | Reinforcement method of floor slab by steel plate |
| JPH01239208A (en) * | 1988-03-17 | 1989-09-25 | Yoshiyuki Ogushi | Method for reinforcing floor board by means of steel plate |
| JP4037862B2 (en) * | 2004-01-30 | 2008-01-23 | 三菱重工橋梁エンジニアリング株式会社 | Steel slab and method of reinforcing the same |
| JP6660646B2 (en) * | 2015-12-16 | 2020-03-11 | 日本鉄塔工業株式会社 | Steel slab bridge |
| JP2017214699A (en) * | 2016-05-30 | 2017-12-07 | 東日本旅客鉄道株式会社 | Girder reinforcement structure |
| JP6700989B2 (en) * | 2016-06-09 | 2020-05-27 | 東日本旅客鉄道株式会社 | Girder reinforcement structure |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6164907A (en) * | 1984-09-05 | 1986-04-03 | 日本コンクリ−ト工業株式会社 | Repairing of concrete floor panel by curved plate |
-
1987
- 1987-01-09 JP JP62002935A patent/JP2508677B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63171906A (en) | 1988-07-15 |
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