JPH0663305B2 - Method and apparatus for fixing PC steel strands - Google Patents
Method and apparatus for fixing PC steel strandsInfo
- Publication number
- JPH0663305B2 JPH0663305B2 JP63259846A JP25984688A JPH0663305B2 JP H0663305 B2 JPH0663305 B2 JP H0663305B2 JP 63259846 A JP63259846 A JP 63259846A JP 25984688 A JP25984688 A JP 25984688A JP H0663305 B2 JPH0663305 B2 JP H0663305B2
- Authority
- JP
- Japan
- Prior art keywords
- tension
- connector
- anchor
- steel
- opening groove
- 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)
- Reinforcement Elements For Buildings (AREA)
Description
【発明の詳細な説明】 (産業上の利用分野) 本発明は、道路橋の橋桁、桁、ロックアンカー又は建築
物の梁、プレキャスト材等のプレストレストコンクリー
ト構造物に定着具を埋設して使用するPC鋼より線類の
定着方法並びに該方法の実施に好適な定着装置に関す
る。DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention is used by embedding a fixing tool in a bridge girder of a road bridge, a girder, a lock anchor or a beam of a building, a prestressed concrete structure such as a precast material. The present invention relates to a fixing method for PC steel strands and a fixing device suitable for carrying out the method.
(従来技術) 道路橋の橋桁、桁、ロックアンカー又は建築物の梁、プ
レキャスト材等のプレストレストコンクリート構造物に
おいて、該構造物にプレストレスを与える場合には、構
造物の両端に定着装置を配置し、緊張材を配置して一端
又は両端から緊張材に緊張力を与える方法が一般に採用
されている。(Prior Art) In a prestressed concrete structure such as a bridge girder of a road bridge, a girder, a lock anchor or a beam of a building, and a precast material, when prestressing the structure, a fixing device is arranged at both ends of the structure. However, a method in which a tension member is arranged and a tension force is applied to the tension member from one end or both ends is generally adopted.
そして、緊張材としてPC鋼線又はPC鋼棒等のPC鋼材が用
いられ、その端部を冷間加工にて製頭加工し、PC鋼線径
とほヾ同径若しくはそれより体系の溝を有する金属製ア
ンカーに取りつけ、更に、該金属製アンカーをコネクタ
ーに螺着させ、そして、緊張材を緊張装置によって緊張
し、その後、定着ナットでアンカーを構造物に定着する
装置が特公・昭45-7494号公報に開示されている。Then, PC steel wire or PC steel rod or other PC steel material is used as a tension material, and the end of the PC steel wire is subjected to head forming by cold working to form a groove with a diameter almost equal to or larger than the PC steel wire diameter. A device for attaching the metal anchor to the connector, screwing the metal anchor to the connector, tensioning the tensioning member with a tensioning device, and then fixing the anchor to the structure with a fixing nut is disclosed in JP-B-45. -7494.
即ち、上記公報に記載された定着装置は、PC鋼線の頭形
状を第11図の正面図に示される通り、PC鋼線(P)の端
部(Pa)を偏平にプレス加工し、漸次拡大する方向の傾斜
面(Pb)を該PC鋼線(P)と一体的に形成し、上記偏平端部
(Pa)の幅bをPC鋼線(P)の径dよりも大きくし、又偏平
端部(Pa)の厚さを緊張材(P)の径dと同等に成形し、こ
れを数本束ねたPC鋼線束とし、そして、第12図A〜D
に示す通り、支圧板(1)の外へ引き出し、PC鋼線束にコ
ネクター(2)を貫通させ、このPC鋼線束を、グラウト孔
(3)を穿設すると共に外周に複数個の開口溝(4)を形成し
たアンカー(5)(第13図参照)の各開口溝(4)に取りつ
け(第12図A参照)、次に、アンカー(5)はコネクタ
ー(2)に螺入してセットし(第12図B参照)、そし
て、この状態で反対側にPC鋼線束を引き戻し、これを反
復して定着具の組立を終了する(第12図B参照)。That is, in the fixing device described in the above publication, as shown in the front view of FIG. 11, the head shape of the PC steel wire is flattened by pressing the end portion (Pa) of the PC steel wire (P), and gradually. An inclined surface (Pb) in the expanding direction is integrally formed with the PC steel wire (P), and the flat end portion is formed.
The width b of (Pa) is made larger than the diameter d of the PC steel wire (P), and the thickness of the flat end (Pa) is formed to be equal to the diameter d of the tension member (P). Bundled PC steel wire bundles, and FIGS. 12A to 12D
As shown in, pull it out of the pressure plate (1), insert the connector (2) through the PC steel wire bundle, and insert the PC steel wire bundle into the grout hole.
Attach (3) to each opening groove (4) of the anchor (5) (see FIG. 13) that has a plurality of opening grooves (4) formed on the outer periphery and is formed on the outer periphery (see FIG. 12A), and then , The anchor (5) is screwed into the connector (2) and set (see Fig. 12B), and in this state, the PC steel wire bundle is pulled back to the other side, and this is repeated to complete the assembly of the fixing device. (See FIG. 12B).
その後、コネクター(2)に緊張装置(6)のテンションロッ
ド(7)を装着し、所定の緊張力に達した時に締めつけナ
ット(8)をコネクター(2)に外周に螺着してPC鋼線束を構
造物に定着する。After that, attach the tension rod (7) of the tensioning device (6) to the connector (2), and when the predetermined tension is reached, tighten the tightening nut (8) around the connector (2) around the PC steel wire bundle. Is fixed to the structure.
定着後、アンカー(5)のグラウト孔(3)からPCグラウトの
注入を行い、後埋コンクリートを施して作業を完了す
る。After fixing, PC grout is injected from the grout hole (3) of the anchor (5), and post-filling concrete is applied to complete the work.
以上の通り、従来の定着手段によれば緊張材としてPC鋼
線或いはPC鋼棒等のPC鋼材を使用する他、そのPC鋼材の
製頭加工をプレス等によって冷間加工を施し、一個のア
ンカーによって定着するようにしていた。As described above, according to the conventional fixing means, a PC steel material such as a PC steel wire or a PC steel rod is used as a tension material, and the heading of the PC steel material is cold-worked by a press or the like to form one anchor. I was trying to fix it.
(発明が解決しようとする課題) 前掲の通り、従来のコンクリート構造物の緊張材の定着
装置にあっては、緊張材としてPC鋼材を使用し、このPC
鋼材の製頭加工をプレス等で前述のような形状に冷間加
工し、それを一個のアンカーに取りつけ、これをコネク
ター(2)にセットし、そして、PC鋼材の緊張作業が完了
後、グラウチング、支圧板の締着を行うようにしたもの
であるが、この従来例によれば、緊張材としてPC鋼材を
使用し、又その端部を冷間で加工することによって埋殺
し使用可能な定着部となるい製頭部を形成していたが、
この種緊張材が適用される構造部には高強度が要求され
ており、この要求を満足する為にはPC鋼材(線、鋼棒)
の太径化、高強度化を図る必要があるが、この種PC鋼材
では限度がある。(Problems to be Solved by the Invention) As described above, in the conventional fixing device for the tension material of the concrete structure, the PC steel material is used as the tension material.
Cold heading of steel material to the above-mentioned shape with a press etc., attach it to one anchor, set this to the connector (2), and after completing the tensioning work of PC steel material, grouting In this conventional example, a PC steel material is used as a tension material, and its end portion is cold-worked so that it can be buried and used. The head was made as a part,
High strength is required for the structural parts to which this kind of tension material is applied, and in order to satisfy this requirement, PC steel materials (wires, steel bars)
It is necessary to increase the diameter and increase the strength, but there is a limit for this type of PC steel material.
この為、緊張材としてPC鋼線を適用する場合には、素線
径5〜7mmの鋼線を多数本使用して高強度化を図るよう
にしているが、アンカーにPC鋼線を取り付ける場合に鋼
線自他に捩りや曲がりの癖があると、その取り付けに多
大な労力と時間を要していた。For this reason, when applying PC steel wire as a tension material, we are trying to increase strength by using many steel wires with a diameter of 5 to 7 mm, but when attaching PC steel wire to the anchor. If the steel wire has a tendency to be twisted or bent, it requires a lot of labor and time to install it.
また、緊張材としてのPC鋼材の容量が多くなれば、それ
らを取りつけるアンカーの外径も大きくしなければなら
ず、定着装置全体の大型化並びにその製作コストの増大
化を招くこととなり、好ましくない。Further, if the capacity of the PC steel material as a tension material increases, the outer diameter of the anchor for mounting them must also be increased, which leads to an increase in the size of the fixing device as a whole and an increase in its manufacturing cost, which is not preferable. .
更に、上記PC鋼材の製頭加工にあっても、プレス等の冷
間加工の手段によっている為、加工圧が高く、加工治具
の破損や製頭加工形状が左右不対称となる等、形状不良
となる場合が多々生じていた。Further, even in the heading process of the above PC steel material, because of the cold working means such as pressing, the processing pressure is high, the damage of the processing jig and the heading process shape become asymmetrical, etc. There were many cases where it became defective.
本発明は上述の観点に鑑み成されたものであって、緊張
材として上記PC鋼材よりも太径化、高強度化が図れるPC
鋼より線を使用し、緊張材の使用本数の低減化を図り、
それによって緊張材のアンカーへの取りつけ作業を簡便
にし、似てアンカー外径の小径化、小型化による定着構
造のコンパクト化を図らせ得るPC鋼より線類の定着方
法並びにその装置を提供することを目的とするものであ
る。The present invention has been made in view of the above-mentioned viewpoint, and a PC having a larger diameter and higher strength than the PC steel material as a tension material can be achieved.
We use steel strands to reduce the number of tendons used.
To provide a fixing method for a PC steel wire and a device therefor, which can simplify the work of attaching the tension material to the anchor, and can similarly reduce the outer diameter of the anchor and the fixing structure by downsizing. The purpose is.
(課題を解決するための手段) 前掲の課題を解決する為に本発明は、そのPC鋼より線の
定着方法として、PC鋼より線類から成る複数本の緊張
材の端末を製頭加工し、構造物に配置した後、支圧板の
外へ引出し、内・外面にねじが刻まれた円筒体からなる
コネクターに貫通させる一方、外周に緊張材を収納する
ための複数個の開口溝が設けられ、かつスリーブが取り
付けられる側の端部に飛び出し防止用の鍔部が外周面の
延長方向に延びて設けられてなる複数個のアンカーを、
開口溝の位相をずらして同軸に直列方向に連結一体化さ
せて、各開口溝に前記緊張材のより線端部分を収納し
て、その周りにコネクターを螺合装置させた後、構造物
内の金属製シース端部内側に位置させ、該コネクター内
に緊張装置のテンションロッドを螺着し、該テンション
ロッドを介して緊張装置で前記緊張材に所定の緊張力を
付与した状態で該コネクター端部外側に締め付けナット
等で支圧板に係止した後、テンションロッドをこのコネ
クターより除去することにより、該緊張材を構造物に定
着するようにしたものである。(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention uses, as a method for fixing the PC stranded wire, a heading process for a plurality of tension material terminals made of PC steel stranded wire. After it is placed on the structure, it is pulled out to the outside of the bearing plate and penetrated through the connector consisting of a cylindrical body with internal and external threads, while a plurality of opening grooves for accommodating the tension material are provided on the outer periphery. And a plurality of anchors, each of which has a collar portion for preventing popping out, which extends in the extension direction of the outer peripheral surface, is provided at the end portion on the side where the sleeve is attached,
After shifting the phase of the opening groove and coaxially connecting and integrating them in the serial direction, the stranded wire end portion of the tension member is housed in each opening groove, and the connector is screwed around it, and then inside the structure. Located inside the metal sheath end of the connector, the tension rod of the tensioning device is screwed into the connector, and the tensioning device applies a predetermined tension force to the tensioning member through the tension rod to end the connector end. The tension member is fixed to the structure by removing the tension rod from the connector after locking the pressure plate to the outside of the portion with a tightening nut or the like.
また本発明は、PC鋼より線の定着装置として、PC鋼
より線類から成り、その端部に製頭部を形成された複数
本の緊張材と、グラウティングのための中心孔が設けら
れ、外周面部にねじが刻まれる円柱状体から成り、前記
緊張材を収納するための開口溝が外周縁部に沿った分周
位置に軸線方向に延びて複数個設けられ、スリーブ飛び
出し防止用の鍔部が前記開口溝のより線製頭部が収まる
側端部の隣合う口縁間に亘って外周面の延長方向に延び
て設けられる複数個のアンカーと、内・外面にねじが刻
まれた円筒体から成り、前記各アンカーがねじ嵌挿され
るコネクターとを備え、複数個のアンカーによって開口
溝の位相をずらして同軸に直列方向に連結一体化され、
各開口溝に緊張材のより線端部分が収納され、さらに各
アンカーがコネクターに螺合装着され、締め付けナット
などの締結具によって構造物に定着されてなる構成とし
たものである。Further, according to the present invention, as a fixing device for a PC steel wire, a plurality of tension members made of PC steel wires and having heads formed at the ends thereof and a center hole for grouting are provided. A cylindrical body having an outer peripheral surface on which a screw is engraved, and a plurality of opening grooves for accommodating the tension member are provided at a dividing position along the outer peripheral edge extending in the axial direction to prevent the sleeve from popping out. A plurality of anchors, each of which has a flange extending in the extension direction of the outer peripheral surface between the adjacent rims of the side ends of the opening groove where the twisted head is accommodated, and screws are engraved on the inner and outer surfaces. And a connector into which each of the anchors is screwed and inserted, the openings are shifted in phase by a plurality of anchors and are coaxially connected and integrated in a serial direction,
The twisted wire end portion of the tension member is housed in each opening groove, each anchor is screwed to the connector, and is fixed to the structure by a fastener such as a tightening nut.
(作用) 本発明のPC鋼より線類の定着方法並びにその装置によ
れば、緊張材としてPC鋼より線を使用するようにしたの
で、PC鋼線より太径化、高強度化が可能となり、従来使
用していたPC鋼線に比較して緊張材の使用本数が1/3
程度に減少し、それに起因してアンカーの外径も小径化
することが可能となり、従って、アンカーをセットする
コネクターも小径化できるので定着具の製造コストが低
減できる。更に、緊張材の使用本数の低減化によってア
ンカーへの取りつけ作業も特別な治具を要せず、省力化
が達成できる。(Operation) According to the method and apparatus for fixing PC stranded wire of the present invention, since the PC stranded wire is used as the tension material, it is possible to increase the diameter and strength of the PC steel wire. , 1/3 the number of tension materials used compared to PC steel wire used conventionally
The anchor diameter can be reduced to a small extent, and the outer diameter of the anchor can be reduced accordingly. Therefore, the connector for setting the anchor can also be reduced in diameter, so that the manufacturing cost of the fixing device can be reduced. Further, since the number of tension members used is reduced, the attachment work to the anchor does not require a special jig, and labor saving can be achieved.
また本発明によれば、同じ形状の複数個のアンカーを同
軸に多段に連結して使用することによって、定着装置全
体の形状を小型化しながら高強度を維持させることが可
能である。Further, according to the present invention, by using a plurality of anchors having the same shape by coaxially connecting them in multiple stages, it is possible to reduce the size of the entire fixing device while maintaining high strength.
(実施例) 以下本発明の実施例を第1図乃至第6図に基づき説明す
る。(Embodiment) An embodiment of the present invention will be described below with reference to FIGS. 1 to 6.
第1図は本発明の緊張材として使用するPC鋼より線Pの
製頭加工の工程を示す模式工程図であって、JIS G3536
SWPR7B12.7mmφのPC鋼より線Pをチャッキングとダイス
とで構成されるプレス(10)に装着し(同図A)、通電し
て400℃以下の温度まで昇温させ(同図B)、その後、
ヘッドダイス(9)を押圧して温間加工を行い(同図C、
D)、第2図に示す通りの製頭形状を形成する。FIG. 1 is a schematic process diagram showing a process of heading processing of a PC steel strand P used as a tension material of the present invention, which is JIS G3536.
SWPR7B 12.7mmφ PC stranded wire P is attached to a press (10) consisting of a chucking and a die (Fig. A), and is energized to raise the temperature to 400 ° C or less (Fig. B). afterwards,
Press the head die (9) to perform warm working (Fig. C,
D), a heading shape as shown in FIG. 2 is formed.
製頭形状は、PC鋼より線Pの線径をd(12,7mm)とする
と、製頭部幅bを1.5d(19.05mm)に形成し、2b(25.4m
m)径の鋼製スリーブ(以下、単にスリーブとする。)
(11)を増摩剤を装填させて製頭部から2.9d(36.83mm)の
範囲に渡って定着する。As for the heading shape, if the diameter of the PC steel wire P is d (12,7mm), the heading width b is 1.5d (19.05mm) and 2b (25.4m).
m) steel sleeve (hereinafter simply referred to as sleeve)
(11) is loaded with a lubricant and fixed over a range of 2.9d (36.83 mm) from the head.
このように製頭加工した8本のPC鋼より線Pを後述する
如く構造物内に配置した後、支圧板の外へ引き出し、コ
ネクター2を貫通させて第3図及び第4図に示すアンカ
ー(5)に取りつける。After arranging the eight PC steel strands P that have been head-machined in this way in the structure as described later, they are drawn out of the pressure bearing plate, and the connector 2 is penetrated to the anchor shown in FIGS. 3 and 4. Attach to (5).
アンカー(5)は同図にある通り、全体を円形状に形成
し、その外周に螺子部(51)を形成し、外周に向けて開口
した開口溝(4)を円周上等間隔に8個穿設し、又前記外
周螺子部(51)の側端には製頭部に装着したスリーブ(11)
飛出し防止要の鍔部(53)を設けた構成としている。As shown in the figure, the anchor (5) is formed into a circular shape as a whole, and a screw portion (51) is formed on the outer periphery thereof, and opening grooves (4) opening toward the outer periphery are formed at equal intervals on the circumference. A sleeve (11) which is pierced individually and is attached to the head-making part at the side end of the outer peripheral screw part (51).
The collar portion (53) that is required to prevent popping out is provided.
アンカー(5)にPC鋼より線Pの取りつけが完了すれば、
該アンカー(5)をコネクター(2)内に螺入し、セット状態
にする。そして、構造物(15)内の金属製シース(12)内に
前記コネクター(2)を位置させ、その後、緊張装置(6)の
テンションロッド(7)を前記コネクター(2)内に螺着し、
PC鋼より線Pに緊張力を付与する(第5図参照)。Once the attachment of the PC steel strand P to the anchor (5) is completed,
The anchor (5) is screwed into the connector (2) to set it. Then, the connector (2) is positioned in the metal sheath (12) in the structure (15), and then the tension rod (7) of the tensioning device (6) is screwed into the connector (2). ,
Tension is applied to the PC steel strand P (see Fig. 5).
尚、図示は省略するが、テンションロッド(7)の先端に
ブッシングを取りつけ、これをコネクター(2)内に螺入
して直接締めつけナット(13)をテンションロッド(7)に
螺着させる場合には、コネクター(2)の外周の螺子部を
不要とすることができ、該コネクター(2)の小径化がよ
り図れ、併せて支圧板(1)の小径化もできる。Although illustration is omitted, when attaching a bushing to the tip of the tension rod (7) and screwing this into the connector (2) to directly tighten the nut (13) to the tension rod (7), Can eliminate the need for a screw part on the outer periphery of the connector (2), further reduce the diameter of the connector (2), and also reduce the diameter of the bearing plate (1).
緊張力が所定値に達したら、締めつけナット(13)をコネ
クター(2)の外周に螺着させ、PC鋼線Pを構造物(15)に
定着させる(第6図参照)。When the tension reaches a predetermined value, the tightening nut (13) is screwed onto the outer periphery of the connector (2) to fix the PC steel wire P to the structure (15) (see FIG. 6).
本発明の定着装置の構成並びに定着法の基本的な態様に
ついては上述の通りであるが、この場合、緊張材として
使用するPC鋼より線Pが多数本の時には第7図乃至第1
0図に示す如く、複数個のアンカー(5)(5)を連結膨張(1
4)で連結して一体化する。The configuration of the fixing device of the present invention and the basic aspect of the fixing method are as described above, but in this case, when the number of the PC steel strands P used as the tension material is many, FIG. 7 to FIG.
As shown in Fig. 0, connect and expand multiple anchors (5) (5) (1
4) Connect and integrate.
即ち、第7図に示す様に前述の実施例で使用した同構造
のアンカー(5)の開口溝(4)に4本のPC鋼より線Pを90度
位相差でもって取りつけ、その後、第8図に示す4個の
開口溝(4)を形成した別のアンカー(5)を連結ボルト(14)
で直列に締着一体化し(第9図参照)、次いで、別のア
ンカー(5)の4個の各開口溝(4)に4本のPC鋼より線Pを
取りつける(第10図参照)。That is, as shown in FIG. 7, four PC steel wires P are attached with a 90-degree phase difference in the opening groove (4) of the anchor (5) of the same structure used in the above-mentioned embodiment, and then, Attach another anchor (5) with four open grooves (4) shown in Fig. 8 to the connecting bolt (14).
Then, they are fastened and integrated in series with each other (see FIG. 9), and then four PC steel strands P are attached to each of the four opening grooves (4) of another anchor (5) (see FIG. 10).
以後、前述の工程に従ってPC鋼より線Pの定着作業を行
う。After that, the fixing work of the PC steel wire P is performed according to the above-mentioned process.
本発明の実施例は以上の通りであるが、以下に従来例と
本発明との比較例を記述する。The embodiment of the present invention is as described above, but a comparative example between the conventional example and the present invention will be described below.
比較例 比較例は、コンクリート高架橋に下記の条件で実施した
ものである。Comparative Example A comparative example was carried out on a concrete viaduct under the following conditions.
従来例 緊張材……PC鋼線(7.0mm×28本) JIS G3536 SWPR1 引張荷重…167t アンカー外径……98mmφ コネクター外径…130mmφ 補助治具…特殊治具要 引張荷重…178t(母材部破断) 製頭加工…冷間加工(形状不良1本発生) 本発明 緊張材……PC鋼より線(12.7mm×9本) JIS G3536 SWPR7B 引張荷重…168t アンカー外径……82mmφ コネクター外径…106mmφ 補助治具…特殊治具不要 引張荷重…180t(母材部破断) 製頭加工…温間加工(形状不良無) 比較結果 緊張材……PC鋼線本数1/3に減少 引張荷重…同等 アンカー外径……83%に減少 コネクター外径…82%に減少 補助治具…特殊治具不要 引張荷重…緊張材強度上問題無 製頭加工…温間加工(形状不良無) (発明の効果) 本発明のPC鋼より線類の定着方法並びにその装置によ
れば、緊張材としてPC鋼線より線を使用するようにした
ので、PC鋼線よりも太径化、高強度化が可能となり、従
来使用していたPC鋼材に比較して緊張材の使用本発明
が1/3程度に減少し、それに起因してアンカーの外径も
小径化することが可能となる。Conventional example Tension material: PC steel wire (7.0 mm x 28) JIS G3536 SWPR1 Tensile load: 167 t Anchor outer diameter: 98 mmφ Connector outer diameter: 130 mmφ Auxiliary jig: Special jig required tensile load: 178 t (base material part) Fracture) Heading process ... Cold working (1 defective shape occurred) The present invention Tension material ... PC steel stranded wire (12.7mm x 9) JIS G3536 SWPR7B Tensile load ... 168t Anchor outer diameter ... 82mmφ Connector outer diameter ... 106mmφ Auxiliary jig… No special jig required Tensile load… 180t (breaking of base material) Head manufacturing… Warm working (no defective shape) Comparison results Tensile material… PC steel wire number reduced to 1/3 Tensile load… equal Anchor outer diameter …… Reduced to 83% Connector outer diameter ・ ・ ・ Reduced to 82% Auxiliary jig… No special jig required Tensile load… No problem in tension material strength Heading process… Warm working (no defective shape) (Effect of the invention According to the method and apparatus for fixing PC stranded wire of the present invention, the PC stranded wire is used as a tension material. As a result, it is possible to make the diameter and strength higher than PC steel wire, and the use of the tension material is reduced to about 1/3 compared to the PC steel material that was conventionally used. The outer diameter of the anchor can be reduced.
従って、アンカーをセットするコネクターも小径化でき
るので定着具の製造コストが低減できる。更に、緊張材
の使用本数の低減化によってアンカーへの取りつけ作業
も特別な治具を要せず、簡便となり、省力化が達成でき
る。Therefore, the diameter of the connector for setting the anchor can be reduced, so that the manufacturing cost of the fixing device can be reduced. Further, since the number of tension members used is reduced, the work of attaching to the anchor does not require a special jig and is simple, and labor saving can be achieved.
そして、緊張材の製頭加工を400℃以下の温間加工で行
うようにしたので、従来の冷間加工に見られる緊張材端
部の製頭形状不良の発生も皆無とった。Further, since the heading process of the tendons is performed by the warm working at 400 ° C. or less, the heading shape defect of the ends of the tendons, which is seen in the conventional cold working, does not occur at all.
さらに本発明によれば、同じ形状の複数個のアンカーを
同軸に多段に連結して使用し、そしてスリーブ飛び出し
防止用の鍔部が外周面の延長方向に延びて設けられる構
造であるため、複数本の緊張材を互いに接するように集
束して張設することが可能であって、しかも定着装置の
外径が1個のアンカーの外径に相当する小径で済み、小
径化されながら高強度が維持される装置を低コストで提
供し得る優れた効果が奏される。Further, according to the present invention, since a plurality of anchors of the same shape are coaxially connected in multiple stages and used, and a collar portion for preventing the sleeve from protruding is provided so as to extend in the extension direction of the outer peripheral surface, a plurality of anchors are provided. It is possible to bundle and tension the tension members of the book so that they are in contact with each other, and the outer diameter of the fixing device may be a small diameter corresponding to the outer diameter of one anchor. The excellent effect that the device to be maintained can be provided at low cost is exhibited.
第1図は本発明の緊張材として使用するPC鋼より線Pの
製頭加工の工程を示す模式工程図、第2図は本発明の緊
張材として使用するPC鋼より線Pの製頭形状を示す断面
図、第3図乃至第6図は本発明の定着装置の実施例を示
すものであって、第3図はPC鋼より線Pをアンカーに取
りつけた状態の端面図、第4図はアンカーの断面図、第
5図及び第6図は本発明の定着装置における定着工程の
断面図、第7図乃至第10図は複数個のアンカーを使用
した場合の本発明の他の実施例を示す定着工程図、第1
1図は従来の定着装置によるPC鋼線の製頭形状を示す正
面図、第12図A〜Dは従来の定着装置による定着工程
を示す模式断面図、第13図は従来の定着装置に適用す
るアンカーの端面図である。 符号の名称は以下の通りである。 (1)…支圧板、(2)…コネクター、(3)…グラウト孔、(4)
…開口溝、(5)…アンカー、(6)…緊張装置、(7)…緊張
装置のテンションロッド、(8)(13)…締めつけナット、
(9)…ヘッドダイス、(10)…プレス、(11)…鋼製スリー
ブ、(12)…金属製シース、(14)…連結ボルト、(15)…構
造物。FIG. 1 is a schematic process diagram showing a step of heading processing of a PC steel wire P used as a tension material of the present invention, and FIG. 2 is a heading shape of a PC steel wire P used as a tension material of the present invention. FIGS. 3 to 6 show an embodiment of the fixing device of the present invention. FIG. 3 is an end view showing a state in which a PC steel strand P is attached to an anchor, and FIG. Is a cross-sectional view of the anchor, FIGS. 5 and 6 are cross-sectional views of the fixing process in the fixing device of the present invention, and FIGS. 7 to 10 are other embodiments of the present invention when a plurality of anchors are used. Fixing process diagram showing the first
FIG. 1 is a front view showing a heading shape of a PC steel wire by a conventional fixing device, FIGS. 12A to 12D are schematic sectional views showing a fixing process by the conventional fixing device, and FIG. 13 is applied to a conventional fixing device. It is an end view of the anchor to do. The names of the symbols are as follows. (1) ... Pressure plate, (2) ... Connector, (3) ... Grout hole, (4)
... Opening groove, (5) ... Anchor, (6) ... Tensioning device, (7) ... Tensioning device tension rod, (8) (13) ... Tightening nut,
(9) ... head die, (10) ... press, (11) ... steel sleeve, (12) ... metal sheath, (14) ... connecting bolt, (15) ... structure.
Claims (2)
端末を製頭加工し、構造物に配置した後、支圧板の外へ
引出し、内・外面にねじが刻まれた円筒体からなるコネ
クターに貫通させる一方、外周に緊張材を収納するため
の複数個の開口溝が設けられ、かつスリーブが取り付け
られる側の端部に飛び出し防止用の鍔部が外周面の延長
方向に延びて設けられてなる複数個のアンカーを、開口
溝の位相をずらして同軸に直列方向に連結一体化させ
て、各開口溝に前記緊張材のより線端部分を収納して、
その周りにコネクターを螺合装着させた後、構造物内の
金属製シース端部内側に位置させ、該コネクター内に緊
張装置のテンションロッドを螺着し、該テンションロッ
ドを介して緊張装置で前記緊張材に所定の緊張力を付与
した状態で該コネクター端部外側に締め付けナット等で
支圧板に係止した後、テンションロッドをこのコネクタ
ーより除去することにより、該緊張材を構造物に定着す
ることを特徴とするPC鋼より線類の定着方法。1. A cylindrical body in which a plurality of ends of a tension material made of PC steel wires are subjected to heading processing, placed on a structure, and then drawn out of a bearing plate, and screws are engraved on the inner and outer surfaces. While having a plurality of opening grooves for accommodating the tension material on the outer circumference, a flange part for preventing popping out extends in the extension direction of the outer peripheral surface while being penetrated through the connector consisting of A plurality of anchors provided by shifting the phase of the opening groove and coaxially connecting and integrating in a serial direction, and storing the twisted wire end portion of the tension member in each opening groove,
After screwing the connector around it, position it inside the end of the metallic sheath in the structure, screw the tension rod of the tensioning device into the connector, and use the tensioning device to insert the tension rod through the tension rod. The tension member is fixed to the structure by removing the tension rod from this connector after locking the tension member to the bearing plate with a tightening nut or the like on the outside of the end of the connector while applying a predetermined tension force to the tension member. A method for fixing wires of PC steel, which is characterized in that
部を形成された複数本の緊張材と、グラウティングのた
めの中心孔が設けられ、外周面部にねじが刻まれる円柱
状体から成り、前記緊張材を収納するための開口溝が外
周縁部に沿った分周位置に軸線方向に延びて複数個設け
られ、スリーブ飛び出し防止用の鍔部が前記開口溝のよ
り線製頭部が収まる側端部の隣合う口縁間に亘って外周
面の延長方向に延びて設けられる複数個のアンカーと、
内・外面にねじが刻まれた円筒体から成り、前記各アン
カーがねじ嵌挿されるコネクターとを備え、複数個のア
ンカーによって開口溝の位相をずらして同軸に直列方向
に連結一体化され、各開口溝に緊張材のより線端部分が
収納され、さらに各アンカーがコネクターに螺合装着さ
れ、締め付けナットなどの締結具によって構造物に定着
されたことを特徴とするPC鋼より線類の定着装置。2. A circle which is made of PC stranded wire and has a plurality of tension members having heads formed at its ends, a center hole for grouting, and a screw thread on the outer peripheral surface. A plurality of opening grooves, each of which is formed of a columnar body, for accommodating the tension member are provided extending in the axial direction at a dividing position along the outer peripheral edge portion, and a collar portion for preventing the sleeve from protruding is provided with a twisted line of the opening groove. A plurality of anchors provided extending in the extension direction of the outer peripheral surface across the adjacent rims of the side end portion where the head manufacturing part fits,
It consists of a cylindrical body with threads engraved on the inner and outer surfaces, and each anchor is provided with a connector into which a screw is inserted, and the phase of the opening groove is shifted by a plurality of anchors to be coaxially connected and integrated in series. The strand end of the tension material is stored in the opening groove, each anchor is screwed to the connector, and is fixed to the structure by a fastener such as a tightening nut. apparatus.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63259846A JPH0663305B2 (en) | 1988-10-14 | 1988-10-14 | Method and apparatus for fixing PC steel strands |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63259846A JPH0663305B2 (en) | 1988-10-14 | 1988-10-14 | Method and apparatus for fixing PC steel strands |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH02108751A JPH02108751A (en) | 1990-04-20 |
JPH0663305B2 true JPH0663305B2 (en) | 1994-08-22 |
Family
ID=17339797
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP63259846A Expired - Fee Related JPH0663305B2 (en) | 1988-10-14 | 1988-10-14 | Method and apparatus for fixing PC steel strands |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0663305B2 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6193091B2 (en) * | 2013-10-29 | 2017-09-06 | オリエンタル白石株式会社 | Repair method of PC structure |
JP6339486B2 (en) * | 2014-11-25 | 2018-06-06 | 首都高速道路株式会社 | Tensile connecting and fixing devices |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59141338A (en) * | 1983-01-31 | 1984-08-14 | Shinko Kosen Kogyo Kk | Construction of fixing part for pc steel stranded wire or the like |
-
1988
- 1988-10-14 JP JP63259846A patent/JPH0663305B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPH02108751A (en) | 1990-04-20 |
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