JP2522943Y2 - Concrete slab reinforcement structure - Google Patents
Concrete slab reinforcement structureInfo
- Publication number
- JP2522943Y2 JP2522943Y2 JP3215391U JP3215391U JP2522943Y2 JP 2522943 Y2 JP2522943 Y2 JP 2522943Y2 JP 3215391 U JP3215391 U JP 3215391U JP 3215391 U JP3215391 U JP 3215391U JP 2522943 Y2 JP2522943 Y2 JP 2522943Y2
- Authority
- JP
- Japan
- Prior art keywords
- concrete slab
- concrete
- reinforcing
- slab
- lightweight aggregate
- 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 - Fee Related
Links
Landscapes
- Bridges Or Land Bridges (AREA)
Description
【0001】[0001]
【産業上の利用分野】本考案は、高速道路の橋梁等に使
用されているコンクリート床版が老朽化した場合に適用
するコンクリート床版の補強構造に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete slab reinforcement structure used when a concrete slab used for a highway bridge or the like is deteriorated.
【0002】[0002]
【従来の技術】高速道路の橋梁等に使用されているコン
クリート床版が経年劣化して来た場合には、コンクリー
ト床版を支持している主桁の中間においてコンクリート
床版の裏面に補強桁を取付けてコンクリート床版の強度
が低下しないようにしている。2. Description of the Related Art When a concrete slab used for a highway bridge or the like has deteriorated over time, a reinforcing girder is attached to the back of the concrete slab in the middle of a main girder supporting the concrete slab. Is installed so that the strength of the concrete slab does not decrease.
【0003】ところがコンクリート床版の劣化がさらに
進むと、コンクリート床版の裏面にひび割れが生じてコ
ンクリート床版が抜け落ちてしまうようになる。However, when the concrete slab further deteriorates, cracks occur on the back surface of the concrete slab, and the concrete slab comes off.
【0004】このようなコンクリート床版が劣化して裏
面のコンクリートが抜け落ちるのを防止するため従来
は、コンクリート床版の裏面において、主桁と補強桁と
の間、並びに補強桁相互の間に鋼板を取付け、これらの
鋼板とコンクリート床版の裏面との間に、エポキシ樹脂
を充填して、鋼板とコンクリート床版とを接着させて、
コンクリート床版裏面の抜け落ちを防止していた。Conventionally, in order to prevent the concrete slab from deteriorating and the concrete on the back side from falling off, conventionally, a steel plate is provided between the main girder and the reinforcing girder and between the reinforcing girders on the back side of the concrete slab. Attach, between these steel plate and the back of the concrete floor slab, fill the epoxy resin, glue the steel plate and the concrete floor slab,
The back of the concrete slab was prevented from falling off.
【0005】[0005]
【考案が解決しようとする課題】ところで、このような
鋼板接着構造では、鋼板を取付けた後に鋼板とコンクリ
ート床版との間にエポキシ樹脂を充填する作業が大変
で、施工が困難になる問題を有し、又コンクリート床版
を支持している鋼桁との結合がないため、いつかは接着
が切れてバラバラになる恐れがあった。このため補強後
も完全にコンクリート床版が抜け落ちることを防止する
ことは出来なかった。またコンクリートの劣化が進んだ
床版では、接着がすぐに剥がれて、補強効果がない欠点
もあった。However, in such a steel plate bonding structure, it is difficult to fill an epoxy resin between the steel plate and the concrete slab after the steel plate is attached, which makes the construction difficult. And there was no connection with the steel girder supporting the concrete floor slab, so there was the danger that someday the adhesive would break and break apart. For this reason, it was not possible to completely prevent the concrete slab from falling off even after reinforcement. In addition, in the case of floor slabs in which the deterioration of concrete has progressed, there was a disadvantage that the adhesion was immediately peeled off and there was no reinforcing effect.
【0006】本考案はこのような従来の欠点を除去し、
コンクリートの劣化が進んだ床版でも有効な補強構造を
提供するものである。[0006] The present invention eliminates such conventional disadvantages,
This provides an effective reinforcing structure even for floor slabs in which concrete has deteriorated.
【0007】[0007]
【課題を解決するための手段】本考案のコンクリート床
版の補強構造は、コンクリート床版の裏面に、一方の面
は床版に密着し、他方の面は中央が脹らんでいる軽量骨
材入成型体を取付け、該成型体表面を紐または帯状の補
強繊維でくるみ、該補強繊維がコンクリート床版を支持
している鋼桁と結合していることより成ることを特徴と
するものである。The reinforcing structure of the concrete slab of the present invention is a lightweight aggregate in which one surface is in close contact with the slab and the other surface is inflated at the center on the back surface of the concrete slab. Mounting the molded body, wrapping the surface of the molded body with a string or a band-like reinforcing fiber, and connecting the reinforcing fiber to a steel girder supporting a concrete floor slab. .
【0008】[0008]
【作用】コンクリート床版に作用する車輌などの荷重
は、該コンクリート床版下に取付けられた軽量骨材入成
型体にそのまま伝わる。該軽量骨材入成型体の中央は脹
らんでいるため、該軽量骨材入成型体の表面にある補強
繊維には膜力として、引張力が作用する。該補強繊維の
引張力を該コンクリート床版を支持している鋼桁に伝え
る。このようにして、コンクリート床版に作用していた
荷重を桁に伝える。中央が脹らんだ軽量骨材入成型体と
補強繊維が主に荷重の伝達を分担するため、コンクリー
ト床版が劣化しても抜け落ちる心配のない構造になる。[Function] The load of a vehicle or the like acting on the concrete slab is directly transmitted to the lightweight aggregate-containing molded body attached under the concrete slab. Since the center of the lightweight aggregate-containing molded body is inflated, a tensile force acts as a membrane force on the reinforcing fibers on the surface of the lightweight aggregate-containing molded body. The tensile force of the reinforcing fibers is transmitted to the steel girders supporting the concrete slab. In this way, the load acting on the concrete slab is transmitted to the girder. Since the lightweight aggregate containing the expanded material at the center and the reinforcing fibers mainly share the load transmission, there is no fear of falling off even if the concrete slab is deteriorated.
【0009】[0009]
【実施例】以下、本考案の実施例を図面に基づいて説明
する。DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings.
【0010】図1は本考案による補強構造を取付けたコ
ンクリート床版1の側面図であって、2はコンクリート
床版1を支持する主桁(鋼桁)、3は補強のためにコン
クリート床版1の裏面に後に取付けた補強桁(鋼桁)で
ある。コンクリート床版1の裏面に沿うように、補強繊
維4の両端が主桁2及び補強桁3の各上フランジ5に固
定され、補強繊維4とコンクリート床版1の裏面との間
には、発泡スチロール等の軽量骨材入成型体6が設置さ
れている。軽量骨材入成型体6は容積がかさむ割に重量
が軽く、圧縮に耐えることができるため、コンクリート
床版1裏面に当接した状態で、コンクリート床版1裏面
のひび割れた部分が抜け落ちるのを防止することができ
る。FIG. 1 is a side view of a concrete slab 1 to which a reinforcing structure according to the present invention is attached, 2 is a main girder (steel girder) supporting the concrete slab 1, and 3 is a concrete slab for reinforcement. 1 is a reinforcing girder (steel girder) attached later to the back surface of 1. Both ends of the reinforcing fiber 4 are fixed to the upper flanges 5 of the main girder 2 and the reinforcing girder 3 along the back surface of the concrete slab 1, and styrofoam is provided between the reinforcing fiber 4 and the back surface of the concrete slab 1. A lightweight aggregate-containing molded body 6 is installed. Since the lightweight aggregate-containing molded body 6 is light in weight despite its bulk and can withstand compression, it is possible to prevent the cracked portion of the back surface of the concrete floor slab 1 from falling off while in contact with the back surface of the concrete floor slab 1. Can be prevented.
【0011】又、上記軽量骨材入成型体6は、上面がコ
ンクリート床版1の裏面に密着する平面形状を有し、下
面中央が脹らんだ形状を有している。The lightweight aggregate-containing molded body 6 has a planar shape in which the upper surface is in close contact with the back surface of the concrete floor slab 1 and has a shape in which the lower center is expanded.
【0012】施工の手順を説明すると、図2に示すよう
に、床版1に穴12をあけ、コンクリートアンカーボル
ト8を挿入する。The procedure of the construction will be described. As shown in FIG. 2, a hole 12 is made in the floor slab 1 and a concrete anchor bolt 8 is inserted.
【0013】一方、図3に示すように、該コンクリート
アンカーボルト8が貫通出来る孔13を持った、軽量骨
材入成型体6を製作しておく。この軽量骨材入成型体6
は、発泡スチロールや、パーライトや、発泡ガラスビー
ズなどの軽量骨材と、エポキシ樹脂やアクリル樹脂や、
セメントモルタルなどで固めたもので、軽くて圧縮に強
い性質を持っている。On the other hand, as shown in FIG. 3, a lightweight aggregate-containing molded body 6 having a hole 13 through which the concrete anchor bolt 8 can pass is manufactured. This molded body with lightweight aggregate 6
Is a lightweight aggregate such as styrofoam, perlite, or foamed glass beads, epoxy resin, acrylic resin,
Hardened with cement mortar, etc., it is light and has strong resistance to compression.
【0014】該軽量骨材入成型体6の上面に接着剤10
を塗り、コンクリート床版1の下面に取付ける。軽量骨
材入成型体6が落ちないように、コンクリートアンカー
ボルト8で固定する。An adhesive 10 is provided on the upper surface of the lightweight aggregate-containing molded body 6.
And attach it to the lower surface of the concrete slab 1. The lightweight aggregate-containing molded body 6 is fixed with concrete anchor bolts 8 so as not to fall.
【0015】次に、図4に示すように、軽量骨材入成型
体6と上フランジ5の隙間に、エポキシモルタルなど
の、隙間充填材7を下面から充填する。Next, as shown in FIG. 4, a gap filler 7 such as epoxy mortar is filled into the gap between the lightweight aggregate-containing molded body 6 and the upper flange 5 from below.
【0016】次に、図5に示すように、補強繊維4で上
フランジ5のスタッドボルト9を編み上げるように結合
する。この補強繊維4は図8に示すような、ガラス繊維
を編んだテープ状のものや、カーボンファイバーを編ん
だロープ状のものを使用する。これらの補強繊維4は軽
くて、錆びることが無く、引張力に耐える性質があるの
で、重量を増やしたくなく、漏水が心配なコンクリート
床版の補強に適している。Next, as shown in FIG. 5, the stud bolts 9 of the upper flange 5 are joined with the reinforcing fibers 4 so as to be knitted. As shown in FIG. 8, the reinforcing fiber 4 is a tape-shaped fiber woven from glass fiber or a rope-shaped fiber woven from carbon fiber. Since these reinforcing fibers 4 are light, do not rust, and have the property of withstanding tensile force, they are suitable for reinforcing concrete floor slabs that do not want to increase in weight and are concerned about water leakage.
【0017】図5に、補強繊維4でスタッドボルト9を
編み上げるように結合する様子を示す。図6は下から補
強部分を見た様子である。スタッドボトル9の周りを補
強繊維4で巻く様子を図7に示す。補強繊維4が落ちな
いように、座金14とナット15で固定する。FIG. 5 shows a state in which the stud bolts 9 are joined by the reinforcing fibers 4 so as to knit. FIG. 6 is a view of the reinforcing portion viewed from below. FIG. 7 shows a state in which the reinforcing fiber 4 is wound around the stud bottle 9. It is fixed with a washer 14 and a nut 15 so that the reinforcing fiber 4 does not fall.
【0018】[0018]
【考案の効果】上記したように本考案では、コンクリー
ト床版の裏面に軽量骨材入成型体を取付け、且つ該軽量
骨材入成型体を鋼桁に補強繊維で縛り付けるようにして
いるので、施工が容易で、しかも既設の桁が設計通りに
なっていなくても自由に施工できるという汎用性を有し
ている等の優れた効果を奏し得る。[Effect of the Invention] As described above, in the present invention, the lightweight aggregate-containing molded body is attached to the back surface of the concrete floor slab, and the lightweight aggregate-containing molded body is tied to the steel girder with the reinforcing fiber. Excellent effects such as easiness of construction and versatility that the existing girder can be freely constructed even if it is not as designed can be obtained.
【図1】本考案の一実施例の側面図である。FIG. 1 is a side view of an embodiment of the present invention.
【図2】軽量骨材入成型体の取付状態を示す側面図であ
る。FIG. 2 is a side view showing a mounted state of a lightweight aggregate-containing molded body.
【図3】軽量骨材入成型体の斜視図である。FIG. 3 is a perspective view of a lightweight aggregate-containing molded body.
【図4】図2の構造において隙間充填材を充填する状態
を示す側面図である。FIG. 4 is a side view showing a state in which a gap filling material is filled in the structure of FIG. 2;
【図5】図4の構造において補強繊維を取付ける状態を
示す側面図である。FIG. 5 is a side view showing a state in which reinforcing fibers are attached in the structure of FIG.
【図6】図5のVI−VI方向より見た下面図である。FIG. 6 is a bottom view as seen from a VI-VI direction in FIG. 5;
【図7】図5の補強繊維の固定部の拡大側面図である。FIG. 7 is an enlarged side view of a fixing portion of the reinforcing fiber of FIG.
【図8】補強繊維の一例を示す平面図である。FIG. 8 is a plan view showing an example of a reinforcing fiber.
【符号の説明】 1 コンクリート床版 2 主桁(鋼桁) 3 補強桁(鋼桁) 4 補強繊維 6 軽量骨材入成型体[Explanation of Signs] 1 Concrete floor slab 2 Main girder (steel girder) 3 Reinforcement girder (steel girder) 4 Reinforcement fiber 6 Lightweight aggregated molded body
Claims (1)
床版に密着し、他方の面は中央が脹らんでいる軽量骨材
入成型体を取付け、該成型体表面を紐または帯状の補強
繊維でくるみ、該補強繊維がコンクリート床版を支持し
ている鋼桁と結合していることより成ることを特徴とす
る、コンクリート床版の補強構造。1. A lightweight aggregate-containing molded product having one surface in close contact with the floor slab and the other surface inflated at the center is attached to the back surface of the concrete slab. A reinforcing structure for a concrete slab, characterized in that it is wrapped with reinforcing fibers and the reinforcing fibers are connected to a steel girder supporting the concrete slab.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3215391U JP2522943Y2 (en) | 1991-04-10 | 1991-04-10 | Concrete slab reinforcement structure |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3215391U JP2522943Y2 (en) | 1991-04-10 | 1991-04-10 | Concrete slab reinforcement structure |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH04119809U JPH04119809U (en) | 1992-10-27 |
JP2522943Y2 true JP2522943Y2 (en) | 1997-01-22 |
Family
ID=31915178
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3215391U Expired - Fee Related JP2522943Y2 (en) | 1991-04-10 | 1991-04-10 | Concrete slab reinforcement structure |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2522943Y2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6211731B1 (en) * | 2017-05-26 | 2017-10-11 | 朝日エンヂニヤリング株式会社 | Concrete pressure receiving plate and pressure receiving structure using the pressure receiving plate |
-
1991
- 1991-04-10 JP JP3215391U patent/JP2522943Y2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPH04119809U (en) | 1992-10-27 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
LAPS | Cancellation because of no payment of annual fees |