JP3290934B2 - Anchor structure of PC steel strand - Google Patents
Anchor structure of PC steel strandInfo
- Publication number
- JP3290934B2 JP3290934B2 JP27854497A JP27854497A JP3290934B2 JP 3290934 B2 JP3290934 B2 JP 3290934B2 JP 27854497 A JP27854497 A JP 27854497A JP 27854497 A JP27854497 A JP 27854497A JP 3290934 B2 JP3290934 B2 JP 3290934B2
- Authority
- JP
- Japan
- Prior art keywords
- wires
- steel strand
- steel
- bulb
- stranded wire
- 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
Classifications
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B7/00—Details of, or auxiliary devices incorporated in, rope- or cable-making machines; Auxiliary apparatus associated with such machines
- D07B7/16—Auxiliary apparatus
- D07B7/18—Auxiliary apparatus for spreading or untwisting ropes or cables into constituent parts for treatment or splicing purposes
- D07B7/187—Auxiliary apparatus for spreading or untwisting ropes or cables into constituent parts for treatment or splicing purposes for forming bulbs in ropes or cables
Description
【０００１】[0001]
【発明の属する技術分野】この発明は複数本のＰＣ鋼よ
り線からなるＰＣケーブルの端部をＰＣ鋼より線毎に分
散させて定着するＰＣ鋼より線の定着部構造に関するも
のである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for fixing a PC steel stranded wire in which ends of a PC cable composed of a plurality of PC steel stranded wires are dispersed and fixed for each PC steel stranded wire.
【０００２】[0002]
【従来の技術及び発明が解決しようとする課題】図３に
示すように複数本のＰＣ鋼より線からなるＰＣケーブル
の、シースから突出する区間をＰＣ鋼より線毎に分散さ
せ、各ＰＣ鋼より線間にコンクリートとの付着力を得る
のに十分な距離だけ隔てて定着する方法において、特に
各ＰＣ鋼より線の末端寄りにおける付着力の増加を図る
ために、ＰＣ鋼より線を構成する複数本のワイヤから、
その一部を折り曲げて球根部を形成する方法がある。2. Description of the Related Art As shown in FIG. 3, sections of a PC cable composed of a plurality of PC steel strands, which protrude from a sheath, are dispersed for each PC steel strand. In the method of fixing the strands with a sufficient distance between the strands to obtain an adhesive force with the concrete, the PC strands are formed in order to increase the adhesive strength particularly at the end of each strand. From multiple wires,
There is a method of forming a bulb portion by bending a part thereof.
【０００３】球根部はそれよりシース寄りの部分がチャ
ックで、末端寄りの部分がプランジャーで把持された状
態で、ＰＣ鋼より線にその軸方向に圧縮力が加えられる
ことで形成されるが、形成された状態では球根部のシー
ス側はより線になったままで、各ワイヤは拘束された状
態にあるのに対し、末端側は単純に束になっただけであ
り、格別に拘束されないため、末端側から力を受ければ
各ワイヤは変形できる状態にある。[0003] The bulb portion is formed by applying a compressive force in the axial direction to a PC stranded wire in a state where a portion closer to the sheath is gripped by a chuck and a portion closer to the end is gripped by a plunger. In the formed state, the sheath side of the bulb remains stranded and each wire is in a constrained state, whereas the distal side is simply a bundle and it is not particularly constrained Each wire can be deformed by receiving a force from the distal end.
【０００４】このため、ＰＣケーブルを構造物の構築位
置に設置し、球根部を所定位置に配置する際にワイヤが
既存の鉄筋等との接触や衝突によりほぐれる可能性があ
り、それぞれの球根部の形状が不均一になる問題があ
る。For this reason, when the PC cable is installed at the construction position of the structure and the bulb portion is arranged at a predetermined position, the wires may be loosened due to contact or collision with the existing rebar or the like. There is a problem that the shape becomes uneven.
【０００５】球根部は各ワイヤ毎に分離することにより
ＰＣ鋼より線の表面積を増し、コンクリートとの付着力
を高める働きをするが、各球根部の形状が不均一になれ
ば、各ＰＣ鋼より線毎の付着耐力に差が生じ、全ＰＣ鋼
より線が一様に抵抗力を発揮できなくなるため、ＰＣケ
ーブルとしての所定の耐力が見込めなくなる不都合があ
る。[0005] The bulb portion serves to increase the surface area of the PC stranded wire by separating each wire and increase the adhesion to concrete, but if the shape of each bulb portion becomes uneven, each PC steel will A difference occurs in the adhesion strength of each stranded wire, so that all the PC stranded wires cannot exhibit a uniform resistance, so that there is an inconvenience that the predetermined proof strength as a PC cable cannot be expected.
【０００６】この発明は上記背景より、球根部を構成す
るワイヤのほぐれを防止する定着部構造を提案するもの
である。SUMMARY OF THE INVENTION In view of the above background, the present invention proposes a fixing portion structure for preventing loosening of a wire constituting a bulb portion.
【０００７】[0007]
【課題を解決するための手段】本発明では各ＰＣ鋼より
線を構成する複数本のワイヤの、球根部の末端寄りで束
になる部分をその全ワイヤが挿通可能な環状の拘束材内
に挿通し、拘束材によって全ワイヤを外周から拘束し、
束の状態を保持することにより、束になる部分が鉄筋等
との接触や衝突によってほぐれ、球根部が変形すること
を防止し、全球根部の形状を均一に保持する。According to the present invention, a portion of a plurality of wires constituting each PC steel stranded wire which is bundled near the end of a bulb portion is placed in an annular restraining member through which all the wires can be inserted. Inserting, restraining all the wires from the outer circumference with the restraining material,
By maintaining the state of the bundle, the portion to be bundled is loosened by contact or collision with a reinforcing bar or the like, and the bulb portion is prevented from being deformed, and the shape of the entire bulb portion is uniformly maintained.
【０００８】ＰＣ鋼より線を構成する複数本の各ワイヤ
は末端寄りにおいて、ＰＣ鋼より線に軸方向に圧縮力が
加えられることによりＰＣ鋼より線の軸に関して放射方
向へ屈曲させられ、互いに分離させられて球根部を形成
し、球根部の末端寄りで束になる。[0008] Each of the plurality of wires constituting the PC steel strand is bent radially with respect to the axis of the PC steel strand by applying a compressive force to the PC steel strand in the axial direction near the end thereof. The bulbs are separated to form bulbs, which are bundled near the ends of the bulbs.
【０００９】その束の部分は全ワイヤが挿通可能な環状
の拘束材内に挿通させられ、全ワイヤが束の部分で外周
から拘束された状態で、ＰＣ鋼より線がコンクリート中
に定着させられる。The bundle portion is inserted into an annular restraining member through which all the wires can be inserted, and the PC steel strand is fixed in the concrete with all the wires being restrained from the outer periphery at the bundle portion. .
【００１０】全ワイヤが束の部分で外周から拘束され、
全球根部の形状が均一に保持されることで、全ＰＣ鋼よ
り線の球根部における付着耐力が同等の大きさになり、
各ＰＣ鋼より線毎の付着耐力の差がなくなるため、全Ｐ
Ｃ鋼より線が一様に抵抗力を発揮でき、ＰＣケーブルと
しての所定の耐力が見込める。[0010] All the wires are restrained from the outer circumference at the bundle portion,
By maintaining the shape of all bulbs uniformly, the adhesion strength at the bulbs of all PC steel strands becomes the same size,
Since there is no difference in adhesion strength between wires from each PC steel, all P
The C steel stranded wire can exhibit resistance uniformly, and a predetermined strength as a PC cable can be expected.
【００１１】[0011]
【発明の実施の形態】この発明は図３に示すように複数
本のＰＣ鋼より線２からなるＰＣケーブル１の、シース
６から突出する区間をＰＣ鋼より線２毎に分散させると
共に、図１，図２に示すように各ＰＣ鋼より線２の末端
寄りにおいて、ＰＣ鋼より線２を構成する複数本のワイ
ヤ３から球根部４を形成すると共に、球根部４の末端寄
りで全ワイヤ３を束にし、束の部分を拘束材によって拘
束した状態で、ＰＣ鋼より線２をコンクリート７中に定
着させる定着部構造である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 3, the present invention disperses a section of a PC cable 1 composed of a plurality of PC steel strands 2 protruding from a sheath 6 for each PC steel strand 2. As shown in FIG. 2, a bulb portion 4 is formed from a plurality of wires 3 constituting the PC steel stranded wire 2 near the end of each PC steel stranded wire 2, and all the wires are located near the end of the bulb 4. 3 is a fixing portion structure in which the PC steel strand 2 is fixed in the concrete 7 in a state in which the bundle 3 is bound and the bundle portion is restrained by the restraining material.
【００１２】球根部４は、ＰＣ鋼より線２を構成する複
数本の各ワイヤ３を折り曲げてＰＣ鋼より線２の軸に関
して放射方向へ屈曲させ、各ワイヤ３を互いに分離させ
ることにより形成される。The bulb portion 4 is formed by bending a plurality of wires 3 constituting the PC stranded wire 2 to bend radially with respect to the axis of the PC stranded wire 2 to separate the wires 3 from each other. You.
【００１３】球根部４の末端寄りで全ワイヤ３を束に
し、その束の部分を全ワイヤ３が挿通可能な環状の拘束
材５内に挿通させることにより、全ワイヤ３が束の部分
で外周から拘束される。All the wires 3 are bundled near the end of the bulb portion 4 and the bundle is inserted into an annular restraining member 5 through which all the wires 3 can be inserted. Restrained from.
【００１４】球根部４は図４に示すようなバルブマシン
８を用い、ＰＣ鋼より線２の球根部４を形成すべき部分
よりシース６寄りの部分をチャック９で、末端寄りの部
分をプランジャー10でそれぞれ把持した状態で、プラン
ジャー10をチャック９側へ移動させ、ＰＣ鋼より線２に
その軸方向に圧縮力を加え、複数本のワイヤ３のチャッ
ク９とプランジャー10間の部分をＰＣ鋼より線２の軸に
関して放射方向へ屈曲させることで形成される。The bulb portion 4 uses a valve machine 8 as shown in FIG. 4, and a portion closer to the sheath 6 than a portion where the bulb portion 4 of the PC stranded wire 2 is to be formed is chucked 9 and a portion closer to the end is planned. The plunger 10 is moved toward the chuck 9 while being gripped by the jars 10, and a compressive force is applied to the PC stranded wire 2 in the axial direction thereof, and a portion of the plurality of wires 3 between the chuck 9 and the plunger 10 is formed. In the radial direction with respect to the axis of the PC steel strand 2.
【００１５】全ワイヤ３はプランジャー10で把持される
前に拘束材５内に挿通させられ、その状態でＰＣ鋼より
線２に圧縮力が加えられる。図１に示すように球根部４
の形成時、全ワイヤ３はその末端より球根部４寄りで束
になるが、拘束材５はこの束になる部分に配置される。The entire wire 3 is inserted into the restraining member 5 before being gripped by the plunger 10, and in this state, a compressive force is applied to the PC steel stranded wire 2. As shown in FIG.
At the time of formation, all the wires 3 are bundled near the bulb portion 4 from the end thereof, and the restraining member 5 is arranged at the portion where the bundle is formed.
【００１６】全ワイヤ３が束になる部分は拘束材５の挿
通孔51に挿通することにより外周から拘束され、球根部
４の形成後からコンクリート７中への定着まで束になっ
た状態を維持する。The portion where all the wires 3 are bundled is restrained from the outer periphery by being inserted into the insertion hole 51 of the restraining material 5, and remains in a bundle from the formation of the bulb portion 4 to the fixation in the concrete 7. I do.
【００１７】拘束材５は、全ワイヤ３が挿通可能で、そ
の全ワイヤ３が束になった状態を保持できる程度の大き
さの挿通孔51を有する環状の部材であり、束になった部
分のほぐれを拘束できれば拘束材５自身の大きさや形
状、あるいは肉厚は一切問われず、既製の座金を拘束材
５として使用することもできる。The restraining member 5 is an annular member having an insertion hole 51 large enough to allow all the wires 3 to pass therethrough and to maintain a state in which all the wires 3 are bundled. As long as the loosening can be restrained, the size, shape, or thickness of the restraining material 5 itself is not limited at all, and a ready-made washer can be used as the restraining material 5.
【００１８】[0018]
【発明の効果】各ＰＣ鋼より線を構成する複数本のワイ
ヤの、球根部の末端寄りで束になる部分をその全ワイヤ
が挿通可能な環状の拘束材内に挿通し、拘束材によって
全ワイヤを外周から拘束することで束になった状態を保
持するため、束になる部分のほぐれによる球根部の変形
を防止でき、全球根部の形状を均一に保持することがで
きる。According to the present invention, the bundles of the plurality of wires constituting each PC steel strand, which are bundled near the end of the bulb portion, are inserted into an annular restraint through which all the wires can be inserted, and all the wires are inserted by the restraint. Since the bundle is held by constraining the wire from the outer periphery, deformation of the bulb portion due to loosening of the bundle portion can be prevented, and the shape of all the bulb portions can be uniformly maintained.
【００１９】全球根部の形状が均一に保持されること
で、全ＰＣ鋼より線の球根部における付着耐力が同等の
大きさになり、各ＰＣ鋼より線毎の付着耐力の差がなく
なるため、ＰＣケーブルとしての所定の耐力を見込むこ
とができる。Since the shape of all the bulb portions is kept uniform, the adhesion strength at the bulb portion of all the PC steel strands becomes equal, and the difference in the adhesion strength between the individual PC steel wires is eliminated. A predetermined strength as a PC cable can be expected.
【図１】ＰＣ鋼より線の複数本のワイヤを拘束材に挿通
した様子を示した斜視図である。FIG. 1 is a perspective view showing a state in which a plurality of wires of a PC steel strand are inserted through a restraining member.
【図２】球根部のコンクリート中への定着状態を示した
断面図である。FIG. 2 is a sectional view showing a state in which a bulb portion is fixed in concrete.
【図３】ＰＣケーブルの端部を示した斜視図である。FIG. 3 is a perspective view showing an end of a PC cable.
【図４】球根部を形成するためのバルブマシンを示した
立面図である。FIG. 4 is an elevation view showing a valve machine for forming a bulb portion.
【符号の説明】 １……ＰＣケーブル、２……ＰＣ鋼より線、３……ワイ
ヤ、４……球根部、５……拘束材、51……挿通孔、６…
…シース、７……コンクリート、８……バルブマシン、
９……チャック、10……プランジャー。[Description of Signs] 1... PC cable, 2... PC steel strand, 3... Wire, 4... Bulb part, 5... Restraining material, 51.
... sheath, 7 ... concrete, 8 ... valve machine,
9 ... Chuck, 10 ... Plunger.
Claims (1)
ブルの、シースから突出する区間をＰＣ鋼より線毎に分
散させ、各ＰＣ鋼より線の末端寄りにおいて、ＰＣ鋼よ
り線を構成する複数本の各ワイヤを、ＰＣ鋼より線に軸
方向に圧縮力を加えてＰＣ鋼より線の軸に関して放射方
向へ屈曲させ、球根部を形成すると共に、全ワイヤを球
根部の末端寄りで束にし、その束の部分を全ワイヤが挿
通可能な環状の拘束材内に挿通し、全ワイヤを束の部分
で外周から拘束した状態で、ＰＣ鋼より線をコンクリー
ト中に定着させるＰＣ鋼より線の定着部構造。1. A section of a PC cable composed of a plurality of PC steel strands that protrudes from a sheath is dispersed for each PC steel strand, and a PC steel strand is formed near the end of each PC steel strand. Each of the plurality of wires is bent radially with respect to the axis of the PC stranded wire by applying a compressive force to the PC stranded wire in the axial direction to form a bulb portion, and all the wires are bundled near the end of the bulb portion. The PC steel strand is fixed to concrete by inserting the bundle part into an annular restraining member through which all the wires can be inserted, and fixing the PC steel strand in the concrete while all the wires are restrained from the outer periphery at the bundle part. Fixing section structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27854497A JP3290934B2 (en) | 1997-10-13 | 1997-10-13 | Anchor structure of PC steel strand |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27854497A JP3290934B2 (en) | 1997-10-13 | 1997-10-13 | Anchor structure of PC steel strand |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11117456A JPH11117456A (en) | 1999-04-27 |
| JP3290934B2 true JP3290934B2 (en) | 2002-06-10 |
Family
ID=17598745
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27854497A Expired - Lifetime JP3290934B2 (en) | 1997-10-13 | 1997-10-13 | Anchor structure of PC steel strand |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3290934B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006016863A (en) * | 2004-07-02 | 2006-01-19 | Hiromu Rokusha | Concrete pole and method of manufacturing concrete pole |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101151552B1 (en) * | 2009-11-26 | 2012-05-30 | 이민호 | Apparatus of Forming Bulbed Cable |
| GB2507089A (en) | 2012-10-18 | 2014-04-23 | Ccl Group Ltd | An anchor having expanded sections in multi wired tendons |
| JP6259807B2 (en) * | 2015-12-25 | 2018-01-10 | 株式会社ピーエス三菱 | Road bridge guard fence and its installation method |
| JP6442104B1 (en) * | 2017-07-31 | 2018-12-19 | 東京製綱株式会社 | Continuous fiber reinforced strand fixing tool |
-
1997
- 1997-10-13 JP JP27854497A patent/JP3290934B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006016863A (en) * | 2004-07-02 | 2006-01-19 | Hiromu Rokusha | Concrete pole and method of manufacturing concrete pole |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH11117456A (en) | 1999-04-27 |
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