JP3379450B2 - Anticorrosion structure - Google Patents
Anticorrosion structureInfo
- Publication number
- JP3379450B2 JP3379450B2 JP30838498A JP30838498A JP3379450B2 JP 3379450 B2 JP3379450 B2 JP 3379450B2 JP 30838498 A JP30838498 A JP 30838498A JP 30838498 A JP30838498 A JP 30838498A JP 3379450 B2 JP3379450 B2 JP 3379450B2
- Authority
- JP
- Japan
- Prior art keywords
- sheet material
- bridge
- shape
- present
- anticorrosion
- 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)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、橋梁等のように外
気に曝され腐食が問題となる構造物に関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure, such as a bridge, which is exposed to the outside air and has a problem of corrosion.
【０００２】[0002]
【従来の技術】架設された橋梁を長期間使用するために
は、各種のメンテナンスが必要である。近年、橋梁のメ
ンテナンスコストを最小にするとか、メンテナンスの行
い易い橋梁が要請されており、構造材の材質面、構造面
から種々の検討がなされている。2. Description of the Related Art In order to use an erected bridge for a long time, various kinds of maintenance are required. In recent years, there have been demands for bridges that can be easily maintained or that minimize the maintenance cost of the bridges, and various studies have been made from the viewpoints of material and structural aspects of structural materials.
【０００３】鋼製橋梁においては、橋梁の長寿命化に対
し、最大のネックは、鉄錆であり、海岸近傍に架設され
た橋梁は、山間部の橋梁より錆が促進されることが報告
されている。With respect to steel bridges, iron rust is the largest neck in order to prolong the life of bridges, and it is reported that bridges built near the coast are promoted to rust more than those in mountainous areas. ing.
【０００４】この防錆対策として、一般的に塗料を塗布
する方法があり、また、材質面からの防錆対策として耐
候性鋼材を橋梁の構成部材として使用し、耐候性鋼材の
表面に生成する安定錆により腐食の進行を防止する方法
がある。As a rust preventive measure, there is generally a method of applying a paint, and as a rust preventive measure from the material side, a weather resistant steel material is used as a constituent member of a bridge and is formed on the surface of the weather resistant steel material. There is a method to prevent the progress of corrosion by stable rust.
【０００５】しかし、塗料を塗布する方法は、数年毎に
塗り替えを行う必要があり、その際の足場架設費用等が
多大となるコスト面での問題がある。However, in the method of applying the paint, it is necessary to repaint every few years, and there is a problem in terms of cost that the scaffolding construction cost and the like at that time are great.
【０００６】また、耐候性鋼材は、塗料を塗布する方法
に比べ、メンテナンス費用が安価であるため、近年、盛
んに使用されているが、耐候性鋼材の表面に安定した錆
を発生させるためには、日照／雨洗の繰り返しが必要で
あり、また、海面からの飛来塩分量の多い環境では、安
定錆が生成し難いという問題がある。[0006] Further, since the maintenance cost of the weather resistant steel material is lower than that of the method of applying a paint, it has been widely used in recent years, but in order to generate stable rust on the surface of the weather resistant steel material. Has a problem that it is difficult to generate stable rust in an environment in which the amount of salt coming from the sea surface is large, because repeated sunshine / rain washing is required.
【０００７】このようなことから、塗料の塗布および耐
候性鋼材の使用に代わるものとして、特表平９−５００
６９８号が提案されている。Therefore, as an alternative to the coating of paint and the use of weather-resistant steel, Japanese Patent Publication No. 9-500
No. 698 is proposed.
【０００８】この公報には、橋梁の下部構造体の外殻を
ガラス繊維強化プラスチックのパネルを多数連結したハ
ウジングで覆い、下部構造体の防食を行うことが開示さ
れている。This publication discloses that the outer shell of the lower structure of the bridge is covered with a housing to which a large number of glass fiber reinforced plastic panels are connected to protect the lower structure from corrosion.
【０００９】[0009]
【発明が解決しようとする課題】しかしながら、特表平
９−５００６９８号の防食構造は、多数のガラス繊維強
化プラスチックパネルを連結し、構造体を構成する部材
に吊持体を多数取付けて連結されたパネルを吊持するも
のである。このため、ハウジングを構成するパネルが大
掛かりとなり、製造、取付け、取替えコストが高価にな
り、また形成できるハウジングの形状は、簡単な形状に
限定される。However, in the anticorrosion structure of Japanese Patent Publication No. 9-500698, a large number of glass fiber reinforced plastic panels are connected, and a large number of suspension members are attached to the members constituting the structure to be connected. The panel is suspended. Therefore, the panel forming the housing becomes large in size, the manufacturing, mounting, and replacement costs are high, and the shape of the housing that can be formed is limited to a simple shape.
【００１０】本発明は、構造物への防食手段の取付け、
取替えコストが安価で、形状が複雑な構造物でも防食手
段の取付けが可能な防食構造物を提供することを目的と
する。The present invention relates to the attachment of anticorrosion means to a structure,
It is an object of the present invention to provide an anticorrosion structure that can be attached with an anticorrosion means even in a structure having a low replacement cost and a complicated shape.
【００１１】[0011]
【課題を解決するための手段】本発明は、上記目的を以
下の構造物によって達成する。The present invention achieves the above object by the following structures.
【００１２】第１の構造物は、複数のＩビーム材等の部
材から構成される構造物であって、構造物の外面に可撓
性かつ、気密性のシート材を張って設け、内部を気密構
造とした後、内部に空気圧をかけ、シート材を膨張させ
たことを特徴とする防食構造物である。 The first structure comprises a plurality of I-beam members and the like.
A structure made of wood, which is flexible on the outer surface of the structure
And airtight sheet material is stretched and the inside is airtight
After building, apply air pressure to expand the sheet material
It is an anticorrosion structure characterized by that.
【００１３】この構造物は、その外面に可撓性があり、
かつ気密性のシート材を張り、内部を気密構造とし、内
部に空気圧をかけ、シート材を膨張させている。 The structure has a flexible outer surface,
In addition, an airtight sheet material is stretched to make the inside airtight,
Air pressure is applied to the part to expand the sheet material.
【００１４】従って、大気中の水分や塩分がシート材に
より、遮断され、構造物の構成部材に水分や塩分が付着
せず、発錆が防止される。さらに、シート材が外側に膨
らみ、一定の形状が保持される。これにより、風による
シート材のバタツキが防止され、シート材の固定部に余
分な荷重がかかるのを防止することができる。また、内
部空気圧による通風効果、除湿、乾燥効果により、防食
性能が向上する。 Therefore, the water content and salt content in the atmosphere can affect the sheet material.
Shut off and moisture and salt adhere to the structural members
Without, rusting is prevented. In addition, the sheet material expands outward.
As a result, a constant shape is maintained. This causes the wind
Flapping of the sheet material is prevented, and there is no
It is possible to prevent a sufficient load from being applied. Also, within
Corrosion protection due to ventilation effect, dehumidification and drying effect due to partial air pressure
Performance is improved.
【００１５】第２の構造物は、第１の構造物において、
シート材の形状を保持するための形状保持材を設けた防
食構造物である。 The second structure is the same as the first structure.
A protective material that holds the shape of the sheet material is provided.
It is a food structure.
【００１６】この構造物によれば、断面形状を任意に選
択できるため、長大橋のように断面形状が耐風安定性に
重大な影響を与える構造物にも適用可能である。 According to this structure, the cross-sectional shape can be arbitrarily selected.
Since it can be selected, the cross-sectional shape becomes wind resistant stability like a long bridge
It is also applicable to structures that have a significant impact.
【００１７】[0017]
【００１８】[0018]
【発明の実施の形態】本発明の実施の形態を図面に基づ
いて以下に説明する。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.
【００１９】図１は、本発明を適用した橋梁の断面図で
ある。１は床版、２は主桁でこの例ではＩビ−ムを使用
している。３は、可撓性を有し、かつ気密性のあるシ−
ト材である。シ−ト材としては、ド−ム球場の天井を覆
っている膜材、テント用膜材やグラスファイバ−製帆材
等が使用される。FIG. 1 is a sectional view of a bridge to which the present invention is applied. 1 is a floor slab, 2 is a main girder, and an I beam is used in this example. 3 is a flexible and airtight sheet.
It is a wood material. As the sheet material, a film material that covers the ceiling of the dome stadium, a film material for a tent, a glass fiber-made sail material, or the like is used.
【００２０】シ−ト材３は、その一端を床版１の一端の
上面１ａおよび側面１ｂに接着材で接着し、その上に当
て板を当てボルトで固着する。そして、シ−ト材３を各
主桁２〜２の下部フランジ２ａの下面に沿って展開し、
他端を床版１の他端の側面１ｂおよび上面１ａに接着材
で接着し、その上に当て板を当てボルトで固着する。シ
−ト材３は、規定幅のものを使用するので、橋梁の長さ
方向において側縁同士を気密に接続されねばならない。
この接続方法としては、側縁同士を重ねて縫合し、シ−
ル材を塗布する等の気密処理を施すことによって行われ
る。One end of the sheet material 3 is adhered to the upper surface 1a and the side surface 1b at one end of the floor slab 1 with an adhesive material, and a backing plate is fixed thereto by a backing bolt. Then, the sheet material 3 is developed along the lower surface of the lower flange 2a of each main girder 2 to 2,
The other end is bonded to the side surface 1b and the upper surface 1a at the other end of the floor slab 1 with an adhesive material, and a backing plate is fixed thereon with a backing bolt. Since the sheet material 3 has a specified width, the side edges must be airtightly connected to each other in the length direction of the bridge.
The connection method is as follows.
It is carried out by performing an airtight treatment such as applying a ruling material.
【００２１】上記のように展開、固定したシ−ト材３で
も、撓みを無くすことはできない。このような撓みのあ
るシ−ト材に沿って風が吹くと、撓み個所にバタツキが
生じ、シ−ト材の固定部にバタツキによる余分な荷重が
かかり、シ−ト材を短命にする。Even with the sheet material 3 expanded and fixed as described above, the bending cannot be eliminated. When wind blows along such a flexible sheet material, fluttering occurs at the flexing points, and an extra load due to the fluttering is applied to the fixing portion of the sheet material, which shortens the life of the sheet material.
【００２２】このシ−ト材のバタツキを防止するために
は、シ−ト材３で囲われた空間４に送風機１０により空
気を供給し、シ−ト材を膨張させればよい。空間の空気
圧は、３０〜５０ｍｍＡｑ程度に維持しておけばよい。
なお、この場合、橋梁の長さ方向端部が、開放されてい
る場合は、その開放面をシ−ト材で閉塞することが必要
である。また、この構造では、内部空気圧による通風効
果、除湿、乾燥効果により防食性能が、さらに向上す
る。In order to prevent the fluttering of the sheet material, air may be supplied to the space 4 surrounded by the sheet material 3 by the blower 10 to expand the sheet material. The air pressure in the space may be maintained at about 30 to 50 mmAq.
In this case, when the lengthwise end of the bridge is open, it is necessary to close the open surface with a sheet material. Further, in this structure, the anticorrosion performance is further improved by the ventilation effect by the internal air pressure, the dehumidification, and the drying effect.
【００２３】図２は、床版１端部に取付けた支持鋼管６
および端部の主桁の下部フランジ２ａに取付けた支持鋼
管７により、橋梁の両側部に橋梁の長さ方向に平行して
延びる鋼管５を支持させ、橋梁の両側部の断面を側方に
向かって尖った三角形に形成した形状保持材を設けた例
を示す。この例では、シ−ト材３を右側の形状保持材５
〜７、主桁のフランジ２ａ〜２ａの下面、左側の形状保
持材５〜７に沿ってシ−ト材３を展開し、シ−ト材の両
端を、それぞれ、床版の上面１ｂに固定している。かく
することによって、橋梁の主桁の腐食防止を図るととも
に、この形状保持材は、シ−ト材の取付け、取替え時や
橋梁の検査補修時の足場として利用することもできる。
また、橋梁の耐風安定性を向上させる。FIG. 2 shows a supporting steel pipe 6 attached to the end of the floor slab 1.
And the supporting steel pipes 7 attached to the lower flanges 2a of the main girders of the ends support the steel pipes 5 extending in parallel to the length direction of the bridge on both sides of the bridge, and the cross sections of both sides of the bridge are directed to the side. An example in which a shape-retaining material formed in a sharp triangle is shown. In this example, the sheet material 3 is replaced by the shape-retaining material 5 on the right side.
~ 7, the sheet material 3 is developed along the lower surfaces of the main girder flanges 2a to 2a and the left shape-retaining materials 5 to 7, and both ends of the sheet material are fixed to the upper surface 1b of the floor slab, respectively. is doing. By doing so, the main girder of the bridge can be prevented from being corroded, and the shape-retaining material can be used as a scaffold at the time of attaching or replacing the sheet material or at the time of inspection and repair of the bridge.
It also improves the wind stability of the bridge.
【００２４】図３は、橋桁の一部に本発明を適用した例
を示す。橋桁の主桁のうち、両端部にある主桁の外面お
よび床版の端部下面は、海からの塩分、湿気を吹くんだ
風に曝され、最も腐食の激しいところである。この例
は、この腐食の激しい端部の主桁の防食を行うために、
本発明を適用したものである。即ち、床版１の端部上面
１ｂおよび端部側面１ａにシ−ト材３の一端を固定し、
シ−ト材で端部主桁２の下部フランジ２ｂを囲うように
展開し、その他端を端部主桁のウエブ２ｂの内面に固定
している。FIG. 3 shows an example in which the present invention is applied to a part of a bridge girder. Out of the main girders of bridge girders, the outer surface of the main girders at both ends and the lower surface of the end part of the deck are exposed to salt from the sea and wind blowing with humidity, and are the most corrosive places. In this example, in order to prevent corrosion of the main girder at the end of this severe corrosion,
The present invention is applied. That is, one end of the sheet material 3 is fixed to the upper end surface 1b and the end side surface 1a of the floor slab 1,
The sheet material is developed so as to surround the lower flange 2b of the end main girder 2, and the other end is fixed to the inner surface of the web 2b of the end main girder.
【００２５】上記の例は橋梁について述べたが、海岸近
くに建設された塔や構造物（形鋼や鋼管で構成されたも
の）の腐食の激しい個所にも適用できる。Although the above example describes a bridge, it can also be applied to a severely corroded portion of a tower or a structure (formed of shaped steel or steel pipe) constructed near the coast.
【００２６】[0026]
【発明の効果】本発明は以上のとおりであり、以下の効
果が得られる。As described above, the present invention has the following effects.
【００２７】請求項１の発明によれば、大気中の水分や
塩分がシ−ト材によって遮断されるから、構造物の腐食
を防止することができる。According to the first aspect of the present invention, since moisture and salt in the atmosphere are blocked by the sheet material, corrosion of the structure can be prevented.
【００２８】請求項２の発明によれば、構造物の腐食を
防止するとともに、シ−ト材の固定部にバタツキによる
余分な荷重がかかるのを防止することができる。また、
内部空気圧による通風効果、除湿乾燥効果により防食性
能が、さらに向上する。According to the second aspect of the present invention, it is possible to prevent the structure from being corroded and prevent an excessive load due to the flap from being applied to the fixing portion of the sheet material. Also,
The anti-corrosion performance is further improved by the ventilation effect by the internal air pressure and the dehumidifying and drying effect.
【００２９】請求項３の発明によれば、さらに、構造物
の断面形状を耐風安定性のよいものにすることができ
る。According to the third aspect of the invention, the cross-sectional shape of the structure can be made to have good wind resistance stability.
【図１】本発明を適用した橋梁の断面図である。FIG. 1 is a cross-sectional view of a bridge to which the present invention has been applied.
【図２】側面に形状保持材を取付け本発明を適用した橋
梁の断面図である。FIG. 2 is a cross-sectional view of a bridge to which a shape-retaining material is attached to the side surface and the present invention is applied.
【図３】橋桁の一部に本発明を適用した橋梁の断面図で
ある。FIG. 3 is a cross-sectional view of a bridge to which the present invention has been applied to a part of a bridge girder.
１ 床版 ２ 主桁 ２ａ 下部フランジ ２ｂ ウエブ ３ シ−ト材 ６〜７ 形状保持部材 １０ 送風機 1 floor slab 2 main girders 2a Lower flange 2b web 3 sheet materials 6 to 7 shape retention member 10 blower
フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) C23F 15/00 E01D 1/00 E01D 2/00 Continuation of front page (58) Fields surveyed (Int.Cl. 7 , DB name) C23F 15/00 E01D 1/00 E01D 2/00
Claims (2)
構造物であって、構造物の外面に可撓性かつ、気密性の
シート材を張って設け、内部を気密構造とした後、内部
に空気圧をかけ、シート材を膨張させたことを特徴とす
る防食構造物。 1. Comprised of a plurality of members such as I-beam material
A structure that is flexible and airtight on the outer surface of the structure
After stretching the sheet material to make the inside airtight structure,
Is characterized by expanding the sheet material by applying air pressure to the
Anticorrosion structure.
部材を設けた請求項１記載の防食構造物。 2. A shape retaining device for retaining the shape of a sheet material.
The anticorrosion structure according to claim 1, wherein a member is provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30838498A JP3379450B2 (en) | 1998-10-29 | 1998-10-29 | Anticorrosion structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30838498A JP3379450B2 (en) | 1998-10-29 | 1998-10-29 | Anticorrosion structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000129475A JP2000129475A (en) | 2000-05-09 |
| JP3379450B2 true JP3379450B2 (en) | 2003-02-24 |
Family
ID=17980428
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30838498A Expired - Fee Related JP3379450B2 (en) | 1998-10-29 | 1998-10-29 | Anticorrosion structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3379450B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4876211B2 (en) * | 2001-04-19 | 2012-02-15 | 株式会社横河ブリッジ | Ventilator for closed section of steel bridge |
-
1998
- 1998-10-29 JP JP30838498A patent/JP3379450B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2000129475A (en) | 2000-05-09 |
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