JPH0663302B2 - PC steel rod fixing part - Google Patents
PC steel rod fixing partInfo
- Publication number
- JPH0663302B2 JPH0663302B2 JP20633083A JP20633083A JPH0663302B2 JP H0663302 B2 JPH0663302 B2 JP H0663302B2 JP 20633083 A JP20633083 A JP 20633083A JP 20633083 A JP20633083 A JP 20633083A JP H0663302 B2 JPH0663302 B2 JP H0663302B2
- Authority
- JP
- Japan
- Prior art keywords
- steel rod
- fixing
- cap
- nut
- fixing part
- 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
- 229910000831 Steel Inorganic materials 0.000 title claims description 19
- 239000010959 steel Substances 0.000 title claims description 19
- 238000003825 pressing Methods 0.000 claims description 2
- 239000011513 prestressed concrete Substances 0.000 claims description 2
- 239000004570 mortar (masonry) Substances 0.000 description 12
- 239000000853 adhesive Substances 0.000 description 5
- 230000001070 adhesive effect Effects 0.000 description 5
- 239000004567 concrete Substances 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000013535 sea water Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005536 corrosion prevention Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Reinforcement Elements For Buildings (AREA)
Description
【発明の詳細な説明】 《技術分野》 本発明はプレストレストコンクリート構造物（以下ＰＣ
構造物と称する）に用いられる緊張材であるＰＣ鋼棒の
定着端部の防食処理に関するものである。DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a prestressed concrete structure (hereinafter PC
The present invention relates to anticorrosion treatment of a fixing end portion of a PC steel rod which is a tension material used for a structure).
《発明の背景》 ＰＣ構造物に用いられるＰＣ鋼棒は、使用時、その材料
のもつ強度のかなり高い比率まで緊張されるので、腐食
環境に曝らされると通常の腐食よりきわめて早い速度で
断面欠損が生じ、ＰＣ鋼棒の破断に至るので、防食処理
を十分にする必要がある。<< Background of the Invention >> PC steel rods used for PC structures are strained to a considerably high ratio of the strength of the material when used, and therefore, when exposed to a corrosive environment, they are much faster than normal corrosion. Since a cross-section loss occurs and the PC steel rod is broken, it is necessary to perform sufficient anticorrosion treatment.
通常、ＰＣ鋼棒は、定着部以外では、ひび割れの入りに
くいコンクリート並びにモルタルで被われ腐食に対して
保護された構造になっているが、定着部特に定着板より
外側の定着具を取り付ける部分は、コンクリート打設、
硬化後、緊張する為に、切欠部があるが、この部分の腐
食に対する保護がＰＣ構造物にとって重要な事である。
従って、この切欠空間部には何らかの防食処理を施す必
要がある。このため従来次に列記する様な防食方法がと
られていた。Normally, the PC steel rod has a structure that is protected from corrosion by being covered with concrete and mortar that are resistant to cracking, except for the fixing part, but the fixing part, especially the part where the fixing tool outside the fixing plate is attached. , Concrete pouring,
There is a notch due to tension after hardening, but protection of this part against corrosion is important for PC structures.
Therefore, it is necessary to perform some kind of anticorrosion treatment on the cutout space. For this reason, conventionally, the following corrosion prevention methods have been taken.
(1)空間部周辺にモルタル接着剤を塗布した後、無収縮
モルタルを充填する。(1) After applying a mortar adhesive around the space, it is filled with non-shrink mortar.
(2)ナット周辺に樹脂を塗布、乾燥後、空間部周辺にモ
ルタル接着剤を塗布し、無収縮モルタルを充填する。(2) After the resin is applied around the nut and dried, the mortar adhesive is applied around the space to fill the non-shrink mortar.
(3)空間部に樹脂モルタルを充填する。(3) Fill the space with resin mortar.
しかし乍ら、これらの方法のみでは、長年月の間に空間
部周辺のコンクリートと無収縮モルタルの境界部から腐
食液が浸透してきて、定着部が腐食環境に曝らされるこ
ともあった。更に近年、ＰＣ構造物が海洋構造物等の如
く、常時、苛酷な環境条件に曝らされるような構造物に
用いられることが多くなってきたが、この海洋構造物等
は、常時、腐食環境としてはきわめて厳しい海水、また
は海水の飛沫に曝らされる上に、波浪等の機械的な作用
も受ける為、従来の防食方法では、充分な防食効果を発
揮することの出来ないおそれが大となって来ている。However, with these methods alone, the corrosive liquid may permeate from the boundary between the concrete and the non-shrink mortar around the space for many years, and the fixing part may be exposed to the corrosive environment. Furthermore, in recent years, PC structures have been increasingly used for structures that are constantly exposed to harsh environmental conditions such as marine structures. However, these marine structures are always corroded. As it is exposed to seawater, which is extremely harsh as an environment, or seawater splashes, it is also mechanically affected by waves and the like, so there is a large possibility that conventional anticorrosion methods may not exhibit sufficient anticorrosion effect. Has become.
《発明の構成》 本発明は、上記の点に鑑み、従来の切欠空間部に充填物
を充填する前に、ＰＣ鋼棒定着用ナツトの周囲に環状の
弾性体とＰＣ鋼棒のネジを利用して、ナットを完全に包
みこむような形にキヤップを取り付けることによって定
着端部の完全な防食処理を行なわしめようとするもので
ある。<Structure of the Invention> In view of the above points, the present invention utilizes an annular elastic body and a screw of a PC steel rod around the PC steel rod fixing nut before filling the conventional cutout space with a filler. Then, the cap is attached to the nut so as to completely wrap it, so that the fixing end portion is completely anticorrosive.
《実施例》 以下、本発明の実施例を図に拠って説明する。第１図に
おいて、１はＰＣ鋼棒で、２はＰＣ鋼棒を緊張定着する
為の切欠部である。この切欠部２に於いて、ＰＣ鋼棒１
は、定着板３とナット４で定着される。この緊張定着さ
れたナットの外周に環状のゴム等の弾性体５を配置し、
片端底版部１０にネジを設けるか、底版に接して比較的
薄肉のナット状のもの１１を取り付けた円筒管キヤップ
６をＰＣ鋼棒１の端部のねじを利用して、回転させ、弾
性体５が変形するまでねじ込みねじ部の一部を含む定着
ナットは完全に密封され外からの腐食環境を遮断する。
この円筒管キヤップ６は非透水性のもので例えば亜鉛メ
ッキ、粉体塗装等の防食加工された鋼製か、プラスチッ
ク製のものが用いられる。そして、このような円筒管キ
ヤツプ６を取り付けた後、切欠部の周辺にモルタル接着
剤７を塗布し、その上に無収縮モルタル８を充填する。
斯く構成することによってＰＣ鋼棒定着部を完全に外部
の環境から遮断することが出来る。«Examples» Examples of the present invention will be described below with reference to the drawings. In FIG. 1, 1 is a PC steel rod, and 2 is a notch portion for fixing the PC steel rod under tension. In this notch 2, PC steel rod 1
Is fixed by the fixing plate 3 and the nut 4. An elastic body 5 such as an annular rubber is arranged on the outer circumference of the tension-fixed nut,
A cylindrical pipe cap 6 provided with a screw on the one-end bottom plate portion 10 or having a relatively thin nut-shaped member 11 attached to the bottom plate is rotated by using the screw on the end portion of the PC steel rod 1 to produce an elastic body. The fixing nut including a part of the threaded screw portion is completely sealed until 5 is deformed, and the corrosive environment from the outside is blocked.
The cylindrical tube cap 6 is made of a water impermeable material, and is made of, for example, galvanized, powder coated or other anticorrosive steel or plastic. Then, after mounting the cylindrical tube cap 6 as described above, a mortar adhesive 7 is applied to the periphery of the notch, and non-shrink mortar 8 is filled on the mortar adhesive 7.
With this configuration, the PC steel rod fixing portion can be completely shielded from the external environment.
また、円筒管キヤップ６の空間内に予め樹脂等の充填物
を充填することによって、より一層確実な防食効果を奏
することが出来る。Further, by filling the space of the cylindrical tube cap 6 with a filling material such as resin in advance, a more reliable anticorrosion effect can be achieved.
尚実施例ではキヤップを円筒形状で且つ底版の中心溝に
ＰＣ鋼棒のねじに螺合するねじを設けたものについて示
したが、円筒形状でなくても、またねじを省略し、補助
ナットをねじ込んで、キヤップを中心溝の外側か押付締
付てもよい。In the embodiment, the cap has a cylindrical shape and the center groove of the bottom plate is provided with a screw to be screwed into the screw of the PC steel rod. However, the cap may be omitted and the auxiliary nut may be omitted. The cap may be screwed in and the cap may be clamped outside the center groove or by pressing.
上記実施例によって説明した様に、本発明によれば従来
法に比し格段の防食効果を有すると共に、その構成が比
較的簡単で容易に施工出来る上に安価で、極めて実用的
である。As described in the above embodiments, according to the present invention, the anti-corrosion effect is remarkably higher than that of the conventional method, and the construction is relatively simple and easy to construct, inexpensive and extremely practical.
第１図は本発明の一実施例を示す一部縦断説明図であ
る。 １…ＰＣ鋼棒、２…切欠部、３…定着板、４…ナット、
５…弾性体、６…円筒管キヤップ、７…モルタル接着
剤、８…無収縮モルタル、９…グリース又は樹脂、１２
…コンクリート。FIG. 1 is a partially longitudinal explanatory view showing an embodiment of the present invention. 1 ... PC steel rod, 2 ... Notch, 3 ... Fixing plate, 4 ... Nut,
5 ... Elastic body, 6 ... Cylindrical tube cap, 7 ... Mortar adhesive, 8 ... Non-shrink mortar, 9 ... Grease or resin, 12
…concrete.
Claims (1)
るＰＣ鋼棒の定着部において、定着用ナットの外周に環
状の弾性体を配置し、円筒状キャップをＰＣ鋼棒の端部
のねじを利用してナットにより締め付けて上記弾性体に
押し付けるか、もしくはキャップの頂部にＰＣ鋼棒のね
じに対応するめねじを刻設してねじ込むことによりキャ
ップを前記弾性体に押し付けて、定着ナットを包被密封
してなることを特徴とするＰＣ鋼棒定着部。1. In a fixing portion of a PC steel rod in a prestressed concrete structure, an annular elastic body is arranged on the outer periphery of a fixing nut, and a cylindrical cap is formed by a nut using a screw at the end portion of the PC steel rod. The cap is pressed against the elastic body by tightening and pressing it against the elastic body, or by engraving and screwing a female screw corresponding to the screw of the PC steel rod on the top of the cap to seal the fixing nut. PC steel rod fixing part characterized by.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20633083A JPH0663302B2 (en) | 1983-11-01 | 1983-11-01 | PC steel rod fixing part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20633083A JPH0663302B2 (en) | 1983-11-01 | 1983-11-01 | PC steel rod fixing part |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6098048A JPS6098048A (en) | 1985-06-01 |
| JPH0663302B2 true JPH0663302B2 (en) | 1994-08-22 |
Family
ID=16521509
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20633083A Expired - Lifetime JPH0663302B2 (en) | 1983-11-01 | 1983-11-01 | PC steel rod fixing part |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0663302B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63188072A (en) * | 1987-01-30 | 1988-08-03 | Hitachi Ltd | Platen roller for thermal transfer printer and its manufacturing method |
| JPH0723460Y2 (en) * | 1987-02-09 | 1995-05-31 | 住友電気工業株式会社 | Prestressed concrete fixing device with protective cover |
| JPH0723461Y2 (en) * | 1987-02-24 | 1995-05-31 | 住友電気工業株式会社 | Prestressed concrete tightening device with leak prevention tool |
-
1983
- 1983-11-01 JP JP20633083A patent/JPH0663302B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6098048A (en) | 1985-06-01 |
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