JPH02157306A - Corrosion preventing method for movable steel part steel of structure - Google Patents
Corrosion preventing method for movable steel part steel of structureInfo
- Publication number
- JPH02157306A JPH02157306A JP63309807A JP30980788A JPH02157306A JP H02157306 A JPH02157306 A JP H02157306A JP 63309807 A JP63309807 A JP 63309807A JP 30980788 A JP30980788 A JP 30980788A JP H02157306 A JPH02157306 A JP H02157306A
- Authority
- JP
- Japan
- Prior art keywords
- elastic material
- resin
- based elastic
- movable part
- steel
- 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.)
- Granted
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 32
- 239000010959 steel Substances 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000005260 corrosion Methods 0.000 title claims abstract description 8
- 230000007797 corrosion Effects 0.000 title claims abstract description 7
- 229920005989 resin Polymers 0.000 claims abstract description 51
- 239000011347 resin Substances 0.000 claims abstract description 51
- 239000013013 elastic material Substances 0.000 claims abstract description 49
- 239000003973 paint Substances 0.000 claims abstract description 10
- 238000009415 formwork Methods 0.000 claims description 22
- 239000000463 material Substances 0.000 claims description 5
- 238000012423 maintenance Methods 0.000 abstract description 3
- 238000004804 winding Methods 0.000 abstract 1
- 238000005536 corrosion prevention Methods 0.000 description 5
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 5
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 4
- 239000012528 membrane Substances 0.000 description 4
- 230000008439 repair process Effects 0.000 description 4
- 239000011701 zinc Substances 0.000 description 4
- 229910052725 zinc Inorganic materials 0.000 description 4
- 230000008602 contraction Effects 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Bridges Or Land Bridges (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
（発明の目的）
（産業上の利用分野）
本発明は、支承や碇着ヒンジ部等の構造物の鋼製可動部
の防蝕方法、特に、後に生ずる補修の容易さを考慮した
防蝕方法に関する。[Detailed Description of the Invention] (Objective of the Invention) (Industrial Application Field) The present invention relates to a method for preventing corrosion of steel movable parts of structures such as bearings and anchoring hinges, and in particular, to improve the ease of subsequent repairs. This article relates to a corrosion prevention method that takes into consideration the following.
（従来の技術）
土木構造物、特に橋梁の支承、碇着ヒンジ部、ケーブル
がアイバーに移る個所、ケーブルサドル部等の鋼製可動
部は、応力がかたよらないように工夫されている。たと
えば、支承は橋梁上部下面、下部上面に設置され、上部
工部材の温度変化による伸縮挙動に追随できるように形
成されている。(Prior Art) Civil engineering structures, especially steel movable parts such as bridge supports, anchorage hinges, cable transfer points, cable saddles, etc., are devised to prevent stress from shifting. For example, the bearings are installed on the lower surface of the upper part of the bridge and the upper surface of the lower part, and are formed so that they can follow the expansion and contraction behavior of the superstructure members due to temperature changes.
この鋼製可動部の維持管理は、管理者にとって非常に重
要である。Maintenance of these moving steel parts is very important for managers.
桁が鋼材である鋼橋の場合には、上部工部材については
、定期的に塗替が実施されているが支承部の塗替は十分
に行われていないのが実情である。In the case of steel bridges whose girders are made of steel, the superstructure members are regularly repainted, but the reality is that the bearing parts are not repainted sufficiently.
方、ＲＣ橋やＰＣ橋においては、塗装を行うことがなく
、鋼製支承でも設置時に防舷塗装が行われるだけで定期
的に防蝕防止のための塗替はほとんどなされていない。On the other hand, RC bridges and PC bridges are not painted, and steel bearings are only painted on the fender at the time of installation, and are rarely repainted regularly to prevent corrosion.
また、塗装を行うにしても支承の場合は作業空間が十分
でないため手の届く節回しか手直しができないのが現状
である。Furthermore, even if painting is done, the current situation is that in the case of bearings, there is not enough work space, so it is only possible to modify the joints that are within reach.
これらの対策として亜鉛溶射したり、鋼製以外の支承を
採用したりしているが、亜鉛溶射は現場作業なので、前
記の作業空間の問題や予想しない冷えた部材に熱い熔融
亜鉛を吹き付けるため、密着性が本来性能に比べ数段劣
り、耐久性が十分と言いがたい。しかも支承の場合には
作業的空間から全面の溶射は困難である。As a countermeasure to these problems, zinc spraying and the use of non-steel bearings are used, but since zinc spraying is on-site work, there are problems with the work space mentioned above and the fact that hot molten zinc is sprayed onto unexpectedly cold parts. The adhesion is much lower than its original performance, and it is difficult to say that its durability is sufficient. Moreover, in the case of bearings, it is difficult to thermally spray the entire surface from the working space.
そのため最近になって、鋼製可動部を樹脂系弾性材で包
み込むことにより空気、水、塩分を遮断することにより
、さらに詳しくは低モジュラスでかつ高透明度を有する
樹脂系弾性材料で鋼製可動部を包み込むことにより上記
欠点を解決する方法が提案されるようになった（特開昭
６３−１７６５０５号公報参照）。Therefore, recently, the steel movable parts are wrapped in a resin-based elastic material to block air, water, and salt. A method has been proposed to solve the above-mentioned drawbacks by enclosing (see Japanese Unexamined Patent Publication No. 176505/1983).
（発明が解決しようとする課題）
この方法によると、支承部等の鋼製可動部は、５川の樹
脂系弾性材料で封入される。これは支承部等の鋼製可動
部の伸縮機能、防錆効果保持、伸縮移動による樹脂系弾
性材料の破損、型枠の保護のためで、特に防錆効果は完
璧に近い状態に維持される。(Problems to be Solved by the Invention) According to this method, the steel movable parts such as the bearing parts are encapsulated with a five-layer resin-based elastic material. This is to maintain the expansion and contraction function of steel movable parts such as bearings, to maintain the rust prevention effect, and to prevent damage to the resin-based elastic material due to expansion and contraction movement, and to protect the formwork.In particular, the rust prevention effect is maintained in a near-perfect state. .
しかしながら、将来、支承部等の損傷や摩耗、不等法下
等により補修することが考えられる。However, in the future, it may be necessary to repair the bearing parts due to damage or wear, or under the Unequal Law.
通常のコンクリート、ポリエステル樹脂、エポキシ樹脂
等を解体する場合は、電動ビック等で簡ｒｌに斬れるが
、この方法に用いられる樹脂系弾性材料は、低モジュラ
スの弾性体のため、ノミの刃がたたず、カッターナイフ
の使用も樹脂系弾性材料が刃に巻き付き、樹脂系弾性材
料の切断は非常に困難である。When dismantling ordinary concrete, polyester resin, epoxy resin, etc., it can be easily cut with an electric bin, etc., but the resin-based elastic material used in this method is a low modulus elastic material, so a chisel blade cannot cut it easily. However, when using a cutter knife, the resin-based elastic material wraps around the blade, making it extremely difficult to cut the resin-based elastic material.
本発明は、このような点に鑑み、以下述べる構成により
、補修時等に樹脂系弾性材料の除去を容易に行うことの
できる構造物の鋼製可動部の防蝕方法を提供せんとする
ものである。In view of these points, the present invention aims to provide a corrosion prevention method for a steel movable part of a structure, which allows easy removal of resin-based elastic material during repair, etc., with the configuration described below. be.
（課題を解決するための手段）
上記目的を達成するために、樹脂系弾性材料で鋼製可動
部を包み込むにあたり、樹脂系弾性材料が型枠内に充填
される前に樹脂系弾性材料が充填されたとき、樹脂系弾
性材料を巻回する線材を型枠内に端部を残して配置して
おき、それから型枠内に樹脂系弾性材料を充填するよう
にしたものであり、さらに好ましくは、予め鋼製可動部
にストリップペイントを塗布し、その後に上記手段を施
すものである。(Means for solving the problem) In order to achieve the above objective, when wrapping the steel movable part with a resin-based elastic material, the resin-based elastic material is filled before the resin-based elastic material is filled into the formwork. When the resin-based elastic material is wound, the wire rod around which the resin-based elastic material is wound is placed in the formwork with its ends left open, and then the resin-based elastic material is filled into the formwork. , a strip paint is applied to the steel movable part in advance, and then the above method is applied.
（作用）
上記手段において、補修時に樹脂系弾性材料を除去する
際に樹脂系弾性材料に巻回された線材の端部を引張るこ
とによって、樹脂系弾性材料をばらばらにし、ストリッ
プペイントの塗布されている部分では樹脂系弾性材料は
ストリップペイントとともに剥離される。(Function) In the above means, when removing the resin-based elastic material during repair, by pulling the end of the wire wound around the resin-based elastic material, the resin-based elastic material is broken up and the strip paint is applied. The resin-based elastic material is peeled off together with the strip paint in the areas where the strip is attached.
（実施例） つぎに本発明の実施例を図面に塞いて説明する。(Example) Next, embodiments of the present invention will be described with reference to the drawings.
まず、第１図において、上沓２が桁４の下面に、下沓３
が橋台５の上面に位置してなる可動部としての支承１に
、予め亜鉛溶射又は防錆塗装等の公知の支承防錆処理を
行い、ついで必要により支承１全体と支承１周辺の桁４
下面と橋台５の上面にストリップペイントを塗布する。First, in Fig. 1, the upper shoe 2 is placed on the lower surface of the girder 4, and the lower shoe 3
The support 1, which is a movable part and is located on the upper surface of the abutment 5, is subjected to a known anti-corrosion treatment such as zinc spraying or anti-rust coating in advance, and then, if necessary, the entire support 1 and the girder 4 around the support 1 are coated.
Apply strip paint to the lower surface and the upper surface of the abutment 5.
ストリップペイントは厚膜の被膜となるが、塗布された
支承部１からは容易に剥離される性質を有している。ス
トリップペイントを塗布後、第２図に示すように支承１
の周りを型枠６で囲撓し、パテ状シール材７でシールす
る。この実施例では内部が見えるように透明のアクリル
板からなる型枠を使用している。Although the strip paint forms a thick film, it has the property of being easily peeled off from the applied support portion 1. After applying the strip paint, install the bearing 1 as shown in Figure 2.
It is surrounded by a formwork 6 and sealed with a putty-like sealing material 7. In this embodiment, a formwork made of a transparent acrylic plate is used so that the inside can be seen.
型枠６の内面には型枠６を後に脱形し易いようにポリエ
チレンテープを貼着しておくとよい。型枠６内には、第
３図及び第４図に示すように樹脂系弾性材料９が充填さ
れて支承部１が包み込まれたときこの樹脂系弾性材料９
を巻回する複数の線材８が、型枠６、橋台５の上面、桁
４の下而に沿って配置される。この実施例では、線材８
はまずａ、ｂ、ｃｌｄが敷設され、つぎにクロスしてｅ
ｌｆが敷設され、いずれも端部は型枠６の外に出でいる
。線材８は錆びない材質のたとえばステンレス線が用い
られる。ついで、樹脂系弾性材料９を注入する。樹脂系
弾性材料９は低モジュラスでかつ高透明度を有する公知
のものが使用できる。型枠６は樹脂系弾性材料９の養生
後に膜形しても、あるいは、そのままにしておいてもい
ずれでもよい。It is preferable to attach polyethylene tape to the inner surface of the formwork 6 so that the formwork 6 can be easily removed later. The mold 6 is filled with a resin-based elastic material 9 as shown in FIGS. 3 and 4, and when the support portion 1 is wrapped, this resin-based elastic material 9
A plurality of wire rods 8 are arranged along the formwork 6, the upper surface of the abutment 5, and the lower part of the girder 4. In this example, the wire rod 8
First, a, b, cld are laid, then they are crossed and e
lf is laid, and both ends are exposed outside the formwork 6. The wire rod 8 is made of a material that does not rust, such as a stainless steel wire. Then, resin-based elastic material 9 is injected. As the resin-based elastic material 9, known materials having low modulus and high transparency can be used. The formwork 6 may be formed into a membrane shape after the resin-based elastic material 9 is cured, or may be left as is.
型枠６を膜形しないときは内部が透視できるように透明
材質のものが用いられる。When the formwork 6 is not in the form of a membrane, a transparent material is used so that the inside can be seen through.
このようにして、樹脂系弾性材料で鋼製可動部を包み込
むことによる防錆方法が実施される。In this way, a rust prevention method is carried out by wrapping the steel movable part with a resin-based elastic material.
本発明は、このようにしてなるので、樹脂系弾性材料９
の解体はつぎのようにして行われる。Since the present invention is made in this way, the resin-based elastic material 9
The disassembly is carried out as follows.
まず、第５図に示すように型枠６の膜形を行う。First, as shown in FIG. 5, the formwork 6 is shaped into a membrane.
型枠６の膜形を行うと支承１を包み込んでいる樹脂系弾
性材ＩＩ９が露出する。露出した樹脂系弾性材料９は第
７図に示すように線材８によって巻回されているので線
材８をｅ、ｆついでａ、ｂ、ｃｌｄの順に引張り除去す
ると第８図に示すようにばらばらとなり、第６図に示す
ように支承１の周りの一部を残して容易に除去される。When the formwork 6 is shaped into a membrane, the resin-based elastic material II9 surrounding the support 1 is exposed. The exposed resin-based elastic material 9 is wound around the wire rod 8 as shown in FIG. 7, so when the wire rod 8 is pulled and removed in the order of e, f, then a, b, and cld, it falls apart as shown in FIG. , as shown in FIG. 6, it is easily removed leaving a part around the support 1.
残りの樹脂系弾性材料９は支承１及びその周辺にストリ
ップペイントが塗布されているため剥離し易い状態とな
っているのでヘラ等で簡単に除去できる。The remaining resin-based elastic material 9 is easily peeled off because the strip paint is applied to the support 1 and its surroundings, so it can be easily removed with a spatula or the like.
なお、この実施例では、もっばら支承を対象として説明
してきたが、本発明は、たとえば斜張橋碇着部のヒンジ
部やケーブルがアイパーに移る個所、ケーブルサドル部
等種々の鋼製可動部に有効であることはもちろんである
。Although this embodiment has mainly been described with reference to bearings, the present invention can also be applied to various steel movable parts such as the hinge part of a cable-stayed bridge anchorage part, the part where the cable moves to the eyeper, and the cable saddle part. Of course, it is effective.
本発明は上述のようにしてなるので、つぎの効果を有す
る。Since the present invention is constructed as described above, it has the following effects.
すなわち、樹脂系弾性材料に線材が巻回されているので
、樹脂系弾性材料が低モジュラスの弾性体であっても、
この線材を引張ることにより解体がきわめて容易であり
、また鋼製可動部にストリップペイントを塗布しておけ
ば大まかに除去された樹脂系弾性材料のわずかの残余に
ついても簡単に剥離できる。In other words, since the wire rod is wound around the resin-based elastic material, even if the resin-based elastic material is an elastic body with a low modulus,
It is extremely easy to disassemble by pulling this wire, and if strip paint is applied to the steel movable part, even the slightest residue of the resin-based elastic material that has been roughly removed can be easily peeled off.
したがって、ｕ７４製可動部を困難を伴わずに表出する
ことができるので、鋼製可動部を樹脂系弾性材料で包む
ことによる防蝕方法の欠点である樹脂系弾性材料の除去
の困難さを解消することができる。Therefore, the U74 movable part can be exposed without difficulty, which eliminates the difficulty in removing the resin-based elastic material, which is a disadvantage of the corrosion prevention method of wrapping the steel movable part with a resin-based elastic material. can do.
第１図から第４図は、本発明の防蝕方法の施工過程を示
す説明図、第５図から第８図は本発明の防蝕方法の施工
後の樹脂系弾性材料の解体要領を示す説明図である。
図面において、１は支承、２は上沓、３は下沓、６は型
枠、８は線材、９は樹脂系弾性材料である。
第１図
特許出願人 ショーボンド建設株式会社代理人弁理士
宇 野 晴 海第３図
第
図
第
図
第
図
第
図
〆イFigures 1 to 4 are explanatory diagrams showing the construction process of the corrosion prevention method of the present invention, and Figures 5 to 8 are explanatory diagrams showing the procedure for dismantling the resin-based elastic material after the corrosion prevention method of the present invention has been applied. It is. In the drawings, 1 is a support, 2 is an upper shoe, 3 is a lower shoe, 6 is a formwork, 8 is a wire rod, and 9 is a resin-based elastic material. Figure 1 Patent applicant: Shobond Construction Co., Ltd., agent and patent attorney
Harumi Uno Figure 3 Figure Figure Figure End of Figure A
Claims (2)
料を充填するための型枠を設置するとともに樹脂系弾性
材料が型枠内に充填されて鋼製可動部が包み込まれたと
き、この樹脂系材料を巻回する線材を型枠内に配置し、
型枠内に樹脂系弾性材料を充填して樹脂系弾性材料で鋼
製可動部を包み込むことを特徴とする構造物の鋼製可動
部の防蝕方法。(1) When a formwork is installed to fill the steel movable part with a resin-based elastic material that wraps around the steel movable part, and the resin-based elastic material is filled into the formwork to enclose the steel movable part. , place the wire rod around which this resin material is wound inside the formwork,
A method for preventing corrosion of a steel movable part of a structure, characterized by filling a mold with a resin-based elastic material and wrapping the steel movable part with the resin-based elastic material.
とともに鋼製可動部に鋼製可動部を包み込む樹脂系弾性
材料を充填するための型枠を設置するとともに樹脂系弾
性材料が型枠内に充填されて鋼製可動部が包み込まれた
とき、この樹脂系材料を巻回する線材を型枠内に配置し
、型枠内に樹脂系弾性材料を充填して樹脂系弾性材料で
鋼製可動部を包み込むことを特徴とする構造物の鋼製可
動部の防蝕方法。(2) Apply strip paint to the steel movable part in advance, install a formwork to fill the steel movable part with a resin-based elastic material that wraps the steel movable part, and fill the resin-based elastic material inside the formwork. When the steel movable part is surrounded by the resin material, the wire around which the resin material is wound is placed in the formwork, the resin-based elastic material is filled in the formwork, and the steel movable part is wrapped with the resin-based elastic material. A method for preventing corrosion of a steel movable part of a structure, characterized by wrapping the part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63309807A JPH02157306A (en) | 1988-12-09 | 1988-12-09 | Corrosion preventing method for movable steel part steel of structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63309807A JPH02157306A (en) | 1988-12-09 | 1988-12-09 | Corrosion preventing method for movable steel part steel of structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02157306A true JPH02157306A (en) | 1990-06-18 |
| JPH0415329B2 JPH0415329B2 (en) | 1992-03-17 |
Family
ID=17997485
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63309807A Granted JPH02157306A (en) | 1988-12-09 | 1988-12-09 | Corrosion preventing method for movable steel part steel of structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02157306A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100453746B1 (en) * | 2002-05-31 | 2004-10-20 | 유니슨 주식회사 | Restoration method and apparatus of bridge bearing |
| JP2007332564A (en) * | 2006-06-12 | 2007-12-27 | West Nippon Expressway Co Ltd | Rust prevention method and rustproof structure of support of bridge |
| JP2010048017A (en) * | 2008-08-22 | 2010-03-04 | Central Japan Railway Co | Filling method of filling material |
| JP2010190029A (en) * | 2009-01-26 | 2010-09-02 | Oiles Ind Co Ltd | Bearing device |
| ES2379819A1 (en) * | 2010-09-13 | 2012-05-04 | Mariano Ribón Sánchez | Replacement procedure of elastic supports on bridges and viaducts, and substitute support. (Machine-translation by Google Translate, not legally binding) |
| JP2013100700A (en) * | 2011-11-09 | 2013-05-23 | Central Nippon Highway Maintenance Hokuriku Co Ltd | Repair method for joint gap inner face at end of concrete floor slab |
| CN106381816A (en) * | 2016-09-08 | 2017-02-08 | 河北省高速公路青银管理处 | Repairing and processing method for corrosion expansion type breakage of bridge member reinforcing bars |
| JP2018009296A (en) * | 2016-07-11 | 2018-01-18 | ショーボンド建設株式会社 | Sealing structure and sealing method |
-
1988
- 1988-12-09 JP JP63309807A patent/JPH02157306A/en active Granted
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100453746B1 (en) * | 2002-05-31 | 2004-10-20 | 유니슨 주식회사 | Restoration method and apparatus of bridge bearing |
| JP2007332564A (en) * | 2006-06-12 | 2007-12-27 | West Nippon Expressway Co Ltd | Rust prevention method and rustproof structure of support of bridge |
| JP2010048017A (en) * | 2008-08-22 | 2010-03-04 | Central Japan Railway Co | Filling method of filling material |
| JP2010190029A (en) * | 2009-01-26 | 2010-09-02 | Oiles Ind Co Ltd | Bearing device |
| ES2379819A1 (en) * | 2010-09-13 | 2012-05-04 | Mariano Ribón Sánchez | Replacement procedure of elastic supports on bridges and viaducts, and substitute support. (Machine-translation by Google Translate, not legally binding) |
| JP2013100700A (en) * | 2011-11-09 | 2013-05-23 | Central Nippon Highway Maintenance Hokuriku Co Ltd | Repair method for joint gap inner face at end of concrete floor slab |
| JP2018009296A (en) * | 2016-07-11 | 2018-01-18 | ショーボンド建設株式会社 | Sealing structure and sealing method |
| CN106381816A (en) * | 2016-09-08 | 2017-02-08 | 河北省高速公路青银管理处 | Repairing and processing method for corrosion expansion type breakage of bridge member reinforcing bars |
| CN106381816B (en) * | 2016-09-08 | 2019-01-18 | 河北省高速公路青银管理处 | The repair process method of bridge member rebar corrosion class breakage |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0415329B2 (en) | 1992-03-17 |
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