JPH0724493Y2 - PC steel edge fixing device - Google Patents
PC steel edge fixing deviceInfo
- Publication number
- JPH0724493Y2 JPH0724493Y2 JP1988074068U JP7406888U JPH0724493Y2 JP H0724493 Y2 JPH0724493 Y2 JP H0724493Y2 JP 1988074068 U JP1988074068 U JP 1988074068U JP 7406888 U JP7406888 U JP 7406888U JP H0724493 Y2 JPH0724493 Y2 JP H0724493Y2
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- steel material
- grip
- sheath
- 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.)
- Expired - Lifetime
Links
Landscapes
- Piles And Underground Anchors (AREA)
- Reinforcement Elements For Buildings (AREA)
Description
【考案の詳細な説明】 （産業上の利用分野） 本考案は、プレストレストコンクリート構造物における
PC鋼材の端部定着装置に関し、主として一端側からのみ
引張する、所謂片引工法における固定端側に圧着グリッ
プを使用し、かつ止水構造となすPC鋼材の端部定着装置
に関する。[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a prestressed concrete structure.
The present invention relates to an end fixing device for a PC steel material, which mainly uses a pressure-bonding grip on a fixed end side in a so-called one-sided construction method in which a pressure is applied only from one end side and which has a waterproof structure.
（従来の技術） 従来、圧着グリップを使用したPC鋼材の端部の定着は、
PC梁やPCスラブにおいては第５図に示すようにコンクリ
ート構造物１に支圧板２を支持させ、その支圧板２の背
面にシース３を接合させるとともに、そのシース３内に
挿通したPC鋼材４を支圧板２に貫通させ、その突出端に
円筒状の圧着グリップ５を圧着させ、これを支圧板２に
当接、支持させるものが一般的である。また、アースア
ンカーにおいては、第６図に示すようにアンカー孔６に
セメントモルタルを充填して成形したアンカーコンクリ
ート７内に支圧板２を埋設し、その支圧板２に前述と同
様にシース３、PC鋼材４及び圧着グリップ５をあらかじ
め組み立てし、これらを支圧板２とともにアンカーコン
クリート７内に埋め込んで定着させたものが一般的であ
る。(Prior art) Conventionally, the fixing of the end of PC steel using a crimp grip is
In the case of PC beams and PC slabs, as shown in FIG. 5, a concrete structure 1 supports a bearing plate 2, a sheath 3 is joined to the back surface of the bearing plate 2, and a PC steel material 4 inserted into the sheath 3 Is generally penetrated through the pressure-bearing plate 2, a cylindrical pressure-bonding grip 5 is pressure-bonded to the protruding end thereof, and the pressure-bearing plate 2 is brought into contact with and supported by the pressure-bonding grip 5. In the earth anchor, as shown in FIG. 6, the bearing plate 2 is embedded in the anchor concrete 7 formed by filling the anchor holes 6 with cement mortar, and the bearing plate 2 has the sheath 3, In general, the PC steel material 4 and the crimp grip 5 are assembled in advance, and these are embedded and anchored in the anchor concrete 7 together with the bearing plate 2.
また近年においては、プレストレストコンクリート構造
の経年的な耐力低下が問題視され、特にPC鋼材の腐食に
よる耐力低下が注目されるに到り、その防食のために、
シース内に防錆剤をグラウトするとともに、第５図に示
すように圧着グリップ５による定着端部の外側をキャッ
プ８で覆い、その中に防錆剤を充填したり、更に永久ア
ンカーのアンカー孔内側の定着部分には定着部の外側を
止水シース９で覆い、地下水が定着部まで浸透しない構
造とする等の処理が施されるに到った。Further, in recent years, the deterioration of the proof stress of the prestressed concrete structure over time has become a problem, and in particular, the decrease in the proof stress due to the corrosion of PC steel has come to the forefront, and for its corrosion protection,
In addition to grouting an anticorrosive agent in the sheath, as shown in FIG. 5, the outside of the fixing end portion by the pressure-bonding grip 5 is covered with a cap 8 and the anticorrosive agent is filled therein, and further, an anchor hole of a permanent anchor. The inner fixing portion has been subjected to treatment such as covering the outer side of the fixing portion with a water blocking sheath 9 so that ground water does not penetrate to the fixing portion.
（考案が解決しようとする課題） しかし、このような従来の防食のためのPC鋼材の端部定
着構造は、いずれも支圧板の外側を力学的な定着に必要
なもの以外の部材を使用して止水を図るものであるた
め、部品数が多くその組立に手数を要しコスト高となる
とともに、構造物の力学的性質にも悪影響を及ぼす等の
問題があった。(Problems to be solved by the invention) However, in all of the conventional PC steel end fixing structures for corrosion prevention, members other than those necessary for mechanical fixing are used on the outside of the bearing plate. Since it is intended to stop the water by using many parts, there are problems that the number of parts is large, labor is required to assemble them, the cost is high, and the mechanical properties of the structure are adversely affected.
本考案はこのような従来の問題にかんがみ、所謂片引式
のPC工法において、圧着グリップを使用した固定側端部
定着部の止水が簡単な構造で、しかも特別に多くの作業
工程を要することなく、簡単に組み立て得るPC鋼材の端
部定着装置の提供を目的としたものである。In consideration of such a conventional problem, the present invention has a structure in which the fixing side end fixing portion using a crimp grip can easily stop water in the so-called one-sided pulling PC method, and particularly requires many working steps. The present invention is intended to provide an end fixing device for a PC steel material that can be easily assembled without the need.
（課題を解決するための手段） 上述の如き従来の問題を解決し、所期の目的を達成する
ための本考案の特徴は、コンクリート構造体内に挿通さ
れて緊張定着されたPC鋼材の少なくとも一端を、圧着グ
リップを介して支圧板に支持させた圧着グリップ定着端
としてなるPC鋼材の端部定着装置において、前記圧着グ
リップ定着端を、前記コンクリート構造体に支持させた
支圧板の背面にシースを水密性を維持させて接合させる
とともに、該シース内に挿通させたPC鋼材を前記支圧板
に貫通させ、該PC鋼材の突出端部に、有底筒状をした圧
着グリップを被せて圧着させ、該圧着グリップと前記支
圧板間に止水パッキンを介在させた構造としたことにあ
る。(Means for Solving the Problems) A feature of the present invention for solving the above-mentioned conventional problems and achieving the intended purpose is that at least one end of a PC steel material that is inserted into a concrete structure and tension-fixed. In an end fixing device of a PC steel material that serves as a pressure-bonding grip fixing end supported by a pressure-supporting plate via a pressure-bonding grip, the pressure-bonding grip fixing end has a sheath on the back surface of the pressure-supporting plate supported by the concrete structure. While joining while maintaining watertightness, the PC steel material inserted in the sheath is penetrated through the pressure plate, and the protruding end portion of the PC steel material is covered with a bottomed cylindrical crimp grip to be crimped, The structure is such that a water blocking packing is interposed between the crimp grip and the pressure bearing plate.
（作用） このPC鋼材の端部定着装置は、PC鋼材に張力が加わると
圧着グリップは止水パッキンを介して支圧板に圧接さ
れ、支圧板と圧着グリップ間の止水がなされる。しかも
圧着グリップは有底筒状であるため、PC鋼材がストラン
ドであるか鋼棒であるかを問わず、その突出端側が気密
の状態に覆われ、完全な止水がなされる。(Function) In this PC steel end fixing device, when a tension is applied to the PC steel, the crimp grip is pressed against the pressure support plate through the water blocking packing to stop the water between the pressure support plate and the pressure grip. Moreover, since the crimp grip has a cylindrical shape with a bottom, regardless of whether the PC steel material is a strand or a steel rod, the protruding end side thereof is covered in an airtight state to completely stop water.
（実施例） 次に本考案の実施例を図面について説明する。(Example) Next, the Example of this invention is described about drawing.
まず第１図及び第２図について、PC梁もしくはPCスラブ
に実施した例を説明する。First, referring to FIG. 1 and FIG. 2, an example carried out on a PC beam or a PC slab will be described.
図において10はPC梁もしくはPCスラブ等のコンクリート
構造体であり、11はシース、12はシース11内に挿通し、
プレストレスを付与するためのPC鋼材である。このPC鋼
材12は、一端側からのみ引張作業を行う、所謂片引工法
のものであり、その固定側が圧着グリップを使用した圧
着グリップ定着端となっており、これに本考案に係る端
部定着装置Ａが使用されている。この端部定着装置Ａ
は、コンクリート構造体10に埋設して支持された支圧板
13を有している。支圧板13は、その背面にシース嵌合部
14が成形されており、これにシース11の先端が嵌合され
テーピング14aにより水密性が保持されている。PC鋼材1
2はシース11内から支圧板13を貫通して、その前面側に
先端部が突出され、このPC鋼材12の突出端部にはゴム製
の止水パッキン15が嵌め合わされ、その突出端側に圧着
グリップ16が圧着されている。圧着グリップ16は有底筒
状をした金属スリーブをPC鋼材12の先端に被せて嵌め合
わせ、外周面からしめてPC鋼材12に圧着させたものであ
る。この圧着グリップ16はPC鋼材12の張力によって支圧
板13側に圧接された状態でその外側が後打コンクリート
によって埋め込まれるようになっている。In the figure, 10 is a concrete structure such as a PC beam or a PC slab, 11 is a sheath, 12 is inserted into the sheath 11,
PC steel for prestressing. This PC steel material 12 is a so-called one-sided construction method that pulls only from one end side, and its fixed side is a pressure-bonding grip fixing end using a pressure-bonding grip. Device A is being used. This edge fixing device A
Is a bearing plate embedded in and supported by the concrete structure 10.
Have 13. The pressure support plate 13 has a sheath fitting portion on its rear surface.
14 is molded, and the tip of the sheath 11 is fitted into this, and the watertightness is maintained by the taping 14a. PC steel 1
2 is a sheath 11 which penetrates the pressure-bearing plate 13 and has a front end projecting from the front side thereof, and a rubber water-stop packing 15 is fitted to the projecting end of the PC steel material 12, and the projecting end is provided on the projecting end side. The crimp grip 16 is crimped. The pressure-bonding grip 16 is a metal sleeve having a bottomed tubular shape, which is fitted onto the tip of the PC steel material 12 by fitting, and is crimped onto the PC steel material 12 by tightening from the outer peripheral surface. The pressure-bonding grip 16 is embedded in the outer side of the pressure-pressing grip 16 on the pressure bearing plate 13 side by the tension of the PC steel material 12 by post-casting concrete.
PC鋼材12の他端側は、引張作業端となっており、支圧板
20に支持させたコーン21に楔22によって定着させ、その
外側をキャップ23をもって覆い、その内部に防錆剤24が
充填された構造となっている。The other end side of the PC steel material 12 is a pulling work end, and is a pressure bearing plate.
A cone 21 supported on 20 is fixed by a wedge 22, the outside is covered with a cap 23, and the inside is filled with a rust preventive agent 24.
なお、シース13内にはPC鋼材12との間にグリース等の防
錆剤を充填して防錆したものが使用されている。また、
この他PC鋼材12外にシース13とは別に樹脂コーティング
による防錆被覆を施したものを使用してもよい。It should be noted that the sheath 13 is used in such a manner that a rust preventive such as grease is filled between the sheath 13 and the PC steel 12 to prevent rust. Also,
In addition to the sheath 13, other than the PC steel material 12, a rustproof coating made of a resin coating may be used.
次に第３図及び第４図についてアースアンカーに実施し
た例について説明する。Next, an example in which the earth anchor is implemented with reference to FIGS. 3 and 4 will be described.
このアースアンカーは緊張鋼材31とアンカーコンクリー
トからなるコンクリート構造体32とにより構成されてい
る。This earth anchor is composed of a tension steel material 31 and a concrete structure 32 made of anchor concrete.
緊張鋼材31はPC鋼撚り線からなるPC鋼材33がポリエチレ
ンシース33aにグリース等を介して摺動自在に挿入さ
れ、そのシース33aの先端が支圧板34の背面に当接され
るとともに、その支圧板34に貫通させてPC鋼材33の先端
が突出され、その突出端に止水パッキン35を嵌め、その
外側に圧着グリップ36が圧着されている。圧着グリップ
36は先細りの有底筒状をなしており、前記緊張鋼材の先
端部全周を被冠するように圧着されている。As the tension steel material 31, a PC steel material 33, which is a PC steel stranded wire, is slidably inserted into a polyethylene sheath 33a through grease or the like, and the tip of the sheath 33a is brought into contact with the back surface of the pressure support plate 34 and its support is provided. The tip of the PC steel material 33 is projected by penetrating the pressure plate 34, the water blocking packing 35 is fitted to the projected end, and the crimp grip 36 is crimped to the outside thereof. Crimp grip
36 has a tapered bottomed cylindrical shape, and is crimped so as to cover the entire circumference of the front end portion of the tension steel material.
また、緊張鋼材31の後端部は耐圧盤37に穿設された調整
孔38に誘導され、該調整孔38で緊張ジャッキにより緊張
されて緊張鋼材31にプレストレスを与える。Further, the rear end portion of the tension steel material 31 is guided to the adjustment hole 38 formed in the pressure board 37, and is tensioned by the tension jack in the adjustment hole 38 to prestress the tension steel material 31.
そして該整整孔38は開口部38aに頭部キャップ39が被冠
されるとともにセメント系グラウトが充填されて防水処
理が行われている。The adjusting hole 38 is waterproofed by the opening 38a being capped with the head cap 39 and filled with cement-based grout.
なお、緊張鋼材１は複数本に限らず、一本で形成するこ
とも任意である。Note that the tension steel material 1 is not limited to a plurality, and it is also possible to form one.
アンカーコンクリート32は削孔機等により地盤に穿設さ
れた適宜長さの削孔40の下部に該削孔40よりも大径な拡
径孔40aが形成され、該拡径孔40aにセメントペーストが
注入されてコンクリート構造体となっている。The anchor concrete 32 has a diameter-expanded hole 40a having a diameter larger than that of the drilled hole 40 formed in the lower portion of the drilled hole 40 having an appropriate length formed in the ground by a drilling machine or the like, and cement paste is applied to the diameter-expanded hole 40a. Is injected into the concrete structure.
また、その注入は緊張鋼材31を削孔40に挿入するととも
に、その支圧部31を拡径孔40aの所定位置にセットした
状態にした後行う。Further, the injection is performed after the tension steel material 31 is inserted into the drilled hole 40 and the bearing portion 31 is set at a predetermined position of the expanded diameter hole 40a.
（考案の効果） 本考案のPC鋼材の端部定着装置は、上述の如く構成さ
れ、支圧板の背面にシースを水密性を保たせて接合する
とともに、その支圧板を貫通させたPC鋼材の先端に有底
筒状の圧着グリップを圧着してその外側を被覆し、その
圧着グリップと支圧板間に止水パッキンを介在させたこ
とにより、従来と同様の圧着グリップの圧着作業、シー
スの接合作業の他に止水パッキン嵌合作業を加えるのみ
でPC鋼材に対する完全な止水ができることとなり作業性
が良く経済性が向上し、しかもコンクリート構造体の力
学的性質にも何ら悪影響を及ぼすことがなくなったもの
である。(Effects of the Invention) The PC steel end fixing device of the present invention is configured as described above, and the sheath is bonded to the back surface of the pressure plate while maintaining watertightness, and the PC steel material that penetrates the pressure plate is By crimping a bottomed cylindrical crimping grip to the outside and covering the outside, and inserting a waterproof packing between the crimping grip and the pressure support plate, crimping work of the crimping grip as in the past, joining of the sheath In addition to the work, it is possible to completely stop the water on the PC steel material simply by adding the work of fitting the waterproof packing, which improves workability and economic efficiency, and also has a negative effect on the mechanical properties of the concrete structure. It's gone.
第１図は本考案の第１実施例の部分省略断面図、第２図
は同要部の拡大断面図、第３図は本考案の第２実施例の
断面図、第４図は同要部の拡大断面図、第５図、第６図
はそれぞれ別々の従来例を示す断面図である。 10、32……コンクリート構造体、11、33a……シース、1
2、33……PC鋼材、13、34……支圧板、15、35……止水
パッキン、16、36……圧着グリップ。FIG. 1 is a partially omitted sectional view of a first embodiment of the present invention, FIG. 2 is an enlarged sectional view of an essential part thereof, FIG. 3 is a sectional view of a second embodiment of the present invention, and FIG. FIG. 5 and FIG. 6 are enlarged cross-sectional views of a portion, respectively, showing different conventional examples. 10,32 …… Concrete structure, 11,33a …… Sheath, 1
2,33 …… PC steel material, 13,34 …… Bearing plate, 15,35 …… Waterproof packing, 16,36 …… Crimping grip.
Claims (2)
着されたPC鋼材の少なくとも一端を、圧着グリップを介
して支圧板に支持させた圧着グリップ定着端としてなる
PC鋼材の端部定着装置において、前記圧着グリップ定着
端を、前記コンクリート構造体に支持させた支圧板の背
面にシースを水密性を維持させて接合させるとともに、
該シース内に挿通させたPC鋼材を前記支圧板に貫通さ
せ、該PC鋼材の突出端部に、有底筒状をした圧着グリッ
プを被せて圧着させ、該圧着グリップと前記支圧板間に
止水パッキンを介在させた構造としたことを特徴として
なるPC鋼材の端部定着装置。1. A pressure-bonding grip fixing end in which at least one end of a PC steel material inserted into a concrete structure and tension-fixed is supported by a pressure plate through a pressure-bonding grip.
In the end fixing device of PC steel material, the pressure-bonding grip fixing end is joined to the back surface of the pressure bearing plate supported by the concrete structure while keeping the sheath watertight.
The PC steel material inserted in the sheath is penetrated through the pressure support plate, and the protruding end of the PC steel material is covered with a crimping grip having a cylindrical shape with a bottom to be crimped. An end fixing device for PC steel, which has a structure with a water packing interposed.
カー孔内に打設したアンカーコンクリートであり、支圧
板が該アンカーコンクリート内に埋設されアンカーPC鋼
材定着用の支圧板である実用新案登録請求の範囲第１項
に記載のPC鋼材の端部定着装置。2. A utility model registration request wherein the concrete structure is an anchor concrete placed in an anchor hole excavated in the ground, and the bearing plate is a bearing plate embedded in the anchor concrete for anchoring PC steel material anchors. 2. An end fixing device for PC steel according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988074068U JPH0724493Y2 (en) | 1988-06-03 | 1988-06-03 | PC steel edge fixing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988074068U JPH0724493Y2 (en) | 1988-06-03 | 1988-06-03 | PC steel edge fixing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01177316U JPH01177316U (en) | 1989-12-19 |
| JPH0724493Y2 true JPH0724493Y2 (en) | 1995-06-05 |
Family
ID=31299187
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1988074068U Expired - Lifetime JPH0724493Y2 (en) | 1988-06-03 | 1988-06-03 | PC steel edge fixing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0724493Y2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0621952Y2 (en) * | 1990-03-19 | 1994-06-08 | 建設基礎エンジニアリング株式会社 | Anchor head processing structure |
| JP2842761B2 (en) * | 1993-05-28 | 1999-01-06 | 住友電気工業株式会社 | Permanent anchor body and method of forming the same |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6138041A (en) * | 1984-07-25 | 1986-02-24 | フレシネ アンテルナシヨナル（エステ−ウ−ペ−） | Apparatus for anchoring prestressed reinforcing member covered with grease |
| JPS61179950A (en) * | 1985-02-04 | 1986-08-12 | 住友電気工業株式会社 | Pc steel material anchoring apparatus |
-
1988
- 1988-06-03 JP JP1988074068U patent/JPH0724493Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01177316U (en) | 1989-12-19 |
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| JPH0413497B2 (en) | ||
| JPH0322348Y2 (en) |