JP2001107507A - Fixing part structure of pc steel product and buffer material injection method in fixing part of pc steel product - Google Patents
Fixing part structure of pc steel product and buffer material injection method in fixing part of pc steel productInfo
- Publication number
- JP2001107507A JP2001107507A JP29103299A JP29103299A JP2001107507A JP 2001107507 A JP2001107507 A JP 2001107507A JP 29103299 A JP29103299 A JP 29103299A JP 29103299 A JP29103299 A JP 29103299A JP 2001107507 A JP2001107507 A JP 2001107507A
- Authority
- JP
- Japan
- Prior art keywords
- steel
- hole
- fitted
- steel material
- resin
- 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
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/08—Members specially adapted to be used in prestressed constructions
- E04C5/12—Anchoring devices
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/12—Mounting of reinforcing inserts; Prestressing
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
- E02D5/80—Ground anchors
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Reinforcement Elements For Buildings (AREA)
- Piles And Underground Anchors (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明はＰＣ鋼材の定着部構
造およびＰＣ鋼材の定着部における緩衝材の注入方法に
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 material and a method for injecting a buffer material into a fixing portion for a PC steel material.
【０００２】[0002]
【従来の技術】従来、プレストレストコンクリート構造
物や鋼構造物のケーブルにはＰＣ鋼より線、ＰＣ鋼線、
ＰＣ鋼棒などのＰＣ鋼材が使用されているが、このＰＣ
鋼材の定着部構造は、図９に示すように、アンカーヘッ
ド２５のＰＣ鋼材用孔２６にＰＣ鋼材２７の端部が挿入
されて圧着グリップ２８で定着されている。この圧着グ
リップ２８は構造物やＰＣ鋼材２７の繰返荷重が作用し
ないようにコンクリート内に埋め込むか、カプラー２９
内にグラウトを充填していた。2. Description of the Related Art Conventionally, cables for prestressed concrete structures and steel structures have been used for PC steel strands, PC steel wires, and the like.
PC steel materials such as PC steel bars are used.
As shown in FIG. 9, an end portion of a PC steel material 27 is inserted into a PC steel hole 26 of an anchor head 25 and is fixed by a crimping grip 28. The crimping grip 28 is embedded in the concrete or a coupler 29 so that the repetitive load of the structure or the PC steel 27 is not applied.
The inside was filled with grout.
【０００３】ところが斜張橋、橋梁、膜構造および吊り
屋根におけるＰＣ鋼材の定着部構造はカプラー２９内に
グラウトを充填しないため、圧着グリップ２８に繰返荷
重が直接作用するようになる。このため前記のＰＣ鋼材
の定着部構造における圧着グリップ２８には繰返荷重に
対する安全性能および定着性能が要求され、この確認に
は圧着グリップ２８に所定の応力振幅を与えながら２０
０万回の繰返荷重を作用させる引張疲労強度試験を実施
することが義務づけられている。However, in the cable stayed bridge, the bridge, the membrane structure, and the anchoring structure of the PC steel material in the suspension roof, since the grout is not filled in the coupler 29, the repetitive load directly acts on the crimping grip 28. For this reason, the crimping grip 28 in the above-described PC steel fixing portion structure is required to have safety performance and fixing performance against repetitive loads, and this is confirmed by applying a predetermined stress amplitude to the crimping grip 28.
It is required to carry out a tensile fatigue strength test in which a repeated load of 100,000 times is applied.
【０００４】[0004]
【発明が解決しようとする課題】しかし、上記のような
ＰＣ鋼材の定着部構造は、下記の表１に示す条件では引
張疲労強度試験において要求されている２００万回の繰
返荷重に耐えられず、十分な安全性能および定着性能を
確保することができなかった。However, the anchoring structure of the PC steel material as described above can withstand the repetitive load of 2 million times required in the tensile fatigue strength test under the conditions shown in Table 1 below. Therefore, sufficient safety performance and fixing performance could not be secured.
【０００５】[0005]
【表１】 [Table 1]
【０００６】本発明は上記のような問題に鑑みてなされ
たものであり、その目的は、引張疲労強度試験に対する
十分な安全性能および定着性能が確保できるＰＣ鋼材の
定着部構造およびＰＣ鋼材の定着部における緩衝材の注
入方法を提供することである。SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a fixing structure of a PC steel material and a fixing of the PC steel material, which can secure sufficient safety performance and fixing performance for a tensile fatigue strength test. The purpose of the present invention is to provide a method of injecting a cushioning material in a part.
【０００７】[0007]
【課題を解決するための手段】以上の課題を解決するた
めの手段は、請求項１の発明が、外周被膜を剥離したＰ
Ｃ鋼材の端部がアンカーヘッドのＰＣ鋼材用孔の出口部
から導出され、かつ圧着グリップの嵌入孔にインサート
を介して嵌合され、前記嵌入孔とＰＣ鋼材用孔とに緩衝
材が充填されたことを特徴とする。Means for solving the above problems are as follows. The invention according to claim 1 is a method in which the outer peripheral coating is peeled off.
An end of the C steel material is led out from an outlet of the PC steel material hole of the anchor head, and is fitted into the fitting hole of the crimping grip via an insert. The buffer material is filled in the fitting hole and the PC steel material hole. It is characterized by having.
【０００８】請求項１の発明によれば、ＰＣ鋼材の引張
疲労強度が上昇する。According to the first aspect of the present invention, the tensile fatigue strength of the PC steel increases.
【０００９】また請求項２の発明が、請求項１におい
て、ＰＣ鋼材はＰＣ鋼より線、ＰＣ鋼線、ＰＣ鋼棒のう
ちのいずれかであることを特徴とする。A second aspect of the present invention is characterized in that, in the first aspect, the PC steel material is any one of a PC steel stranded wire, a PC steel wire, and a PC steel rod.
【００１０】請求項２の発明によれば、ＰＣ鋼より線、
ＰＣ鋼線、ＰＣ鋼棒の引張疲労強度が大きくなる。According to the second aspect of the present invention, a PC stranded wire,
The tensile fatigue strength of PC steel wires and PC steel bars increases.
【００１１】また請求項３の発明が、請求項２におい
て、前記ＰＣ鋼より線の芯線と側線の外面、ＰＣ鋼線の
外面、ＰＣ鋼棒の外面にはそれぞれ被膜が施されたこと
を特徴とする。According to a third aspect of the present invention, in the second aspect, a coating is applied to an outer surface of a core wire and a side wire of the PC steel stranded wire, an outer surface of the PC steel wire, and an outer surface of the PC steel rod. And
【００１２】請求項３の発明によれば、ＰＣ鋼より線の
芯線と側線との外面、ＰＣ鋼線の外面、ＰＣ鋼棒の外面
の被膜により、ＰＣ鋼材用孔と嵌入孔との入口部のＰＣ
鋼材に作用する応力および摩擦熱を吸収するとともに、
芯線と側線との間に発生する摩擦熱からこれらを保護す
る。また圧着グリップの嵌入孔と、アンカーヘッドのＰ
Ｃ鋼材用孔とにおけるＰＣ鋼より線に作用する切欠力を
弱くする。According to the third aspect of the present invention, the outer surface of the core wire and the side wire of the PC steel stranded wire, the outer surface of the PC steel wire, and the outer surface of the PC steel rod are coated to form the entrance between the hole for the PC steel material and the fitting hole. PC
While absorbing the stress and frictional heat acting on the steel,
These are protected from frictional heat generated between the core wire and the side wire. In addition, the insertion hole of the crimping grip and the P of the anchor head
The notch force acting on the PC stranded wire in the hole for the C steel material is reduced.
【００１３】また請求項４の発明が、請求項１におい
て、アンカーヘッドがカプラーにねじ込まれたことを特
徴とする。According to a fourth aspect of the present invention, in the first aspect, the anchor head is screwed into the coupler.
【００１４】請求項４の発明によれば、圧着グリップが
カプラーで保護される。According to the fourth aspect of the present invention, the pressure grip is protected by the coupler.
【００１５】また請求項５の発明が、請求項１におい
て、ＰＣ鋼材用孔の入口部にはＰＣ鋼材との間にスペー
サーが嵌合され、該スペーサーがＰＣ鋼材用孔内にプレ
ートで押し込まれたことを特徴とする。According to a fifth aspect of the present invention, in the first aspect, a spacer is fitted between the inlet of the PC steel material and the PC steel material, and the spacer is pushed into the PC steel material hole by a plate. It is characterized by having.
【００１６】請求項５の発明によれば、スペーサによっ
てＰＣ鋼材とＰＣ鋼材用孔との芯合わせが確実かつ簡単
にできる。According to the fifth aspect of the invention, the alignment between the PC steel material and the hole for the PC steel material can be reliably and easily performed by the spacer.
【００１７】また請求項６の発明が、請求項１におい
て、圧着グリップはエンドプレートでアンカーヘッドに
押しつけられたことを特徴とする。According to a sixth aspect of the present invention, in the first aspect, the pressure grip is pressed against the anchor head by the end plate.
【００１８】請求項６の発明によれば、圧着グリップを
アンカーヘッドに固定することができる。According to the invention of claim 6, the pressure grip can be fixed to the anchor head.
【００１９】また請求項７の発明が、請求項１におい
て、緩衝材はエポキシ樹脂、ポリウレタン樹脂、ポリブ
タジェン樹脂、不飽和ポリエステル樹脂、ビニルエステ
ル樹脂、シリコン樹脂、メタクリル樹脂、ポリオレフィ
ン樹脂のうちのいずれかであることを特徴とする。According to a seventh aspect of the present invention, in the first aspect, the buffer material is any one of an epoxy resin, a polyurethane resin, a polybutadiene resin, an unsaturated polyester resin, a vinyl ester resin, a silicone resin, a methacryl resin, and a polyolefin resin. It is characterized by being.
【００２０】請求項７の発明によれば、ＰＣ鋼材をせん
断応力や摩擦熱から保護できる。According to the invention of claim 7, the PC steel material can be protected from shear stress and frictional heat.
【００２１】また請求項８の発明が、外周被膜が剥離さ
れたＰＣ鋼材の端部をアンカーヘッドのＰＣ鋼材用孔の
出口部から導出し、かつ圧着グリップの嵌入孔にインサ
ートを介して嵌合し、前記圧着グリップの嵌入孔に緩衝
材を圧入した後、該緩衝材が圧入された圧着グリップを
ＰＣ鋼材用孔の出口部に嵌入するとともに、前記ＰＣ鋼
材用孔に入口部から緩衝材を圧入することを特徴とす
る。According to the invention of claim 8, the end of the PC steel from which the outer peripheral coating has been peeled is led out from the outlet of the PC steel hole of the anchor head, and fitted into the fitting hole of the crimping grip via an insert. Then, after press-fitting the cushioning material into the fitting hole of the crimping grip, the crimping grip into which the cushioning material is press-fitted is fitted into the outlet of the PC steel hole, and the cushioning material is inserted into the PC steel hole from the entrance. It is characterized by press-fitting.
【００２２】請求項８の発明によれば、圧着グリップの
嵌入孔とアンカーヘッドのＰＣ鋼材用孔とに緩衝材を確
実かつ簡単に圧入できる。According to the invention of claim 8, the cushioning material can be securely and easily press-fitted into the fitting hole of the crimping grip and the PC steel hole of the anchor head.
【００２３】また請求項９の発明が、アンカーヘッドの
ＰＣ鋼材用孔の内面に緩衝材を塗布し、外周被膜が剥離
されたＰＣ鋼材の端部をＰＣ鋼材用孔の出口部から導出
して圧着グリップの嵌入孔にインサートを介して嵌合
し、前記圧着グリップの嵌入孔に緩衝材を圧入した後、
該緩衝材を圧入した圧着グリップをＰＣ鋼材用孔の出口
部に嵌入することを特徴とする。According to a ninth aspect of the present invention, a cushioning material is applied to the inner surface of the PC steel material hole of the anchor head, and the end of the PC steel material from which the outer peripheral coating has been peeled is led out from the outlet portion of the PC steel material hole. After fitting into the fitting hole of the crimping grip via the insert and pressing the cushioning material into the fitting hole of the crimping grip,
The crimping grip into which the cushioning material is press-fitted is fitted into the outlet of the PC steel hole.
【００２４】請求項９の発明によれば、アンカーヘッド
のＰＣ鋼材用孔に緩衝材を確実かつ簡単に入れることが
できる。According to the ninth aspect of the present invention, the cushioning material can be securely and easily inserted into the hole for the PC steel of the anchor head.
【００２５】また請求項１０の発明が、請求項７または
８において、緩衝材はエポキシ樹脂、ポリウレタン樹
脂、ポリブタジェン樹脂、不飽和ポリエステル樹脂、ビ
ニルエステル樹脂、シリコン樹脂、メタクリル樹脂、ポ
リオレフィン樹脂のうちのいずれかであることを特徴と
する。According to a tenth aspect of the present invention, in the seventh or eighth aspect, the buffer material is an epoxy resin, a polyurethane resin, a polybutadiene resin, an unsaturated polyester resin, a vinyl ester resin, a silicone resin, a methacryl resin, or a polyolefin resin. It is one of the features.
【００２６】請求項１０の発明によれば、ＰＣ鋼材をせ
ん断応力や摩擦熱から保護できる。According to the tenth aspect, the PC steel can be protected from shear stress and frictional heat.
【００２７】また請求項１１の発明が、請求項７におい
て、ＰＣ鋼材用孔に入口部から緩衝材を圧入した後に、
前記入口部にスペーサーを嵌入することを特徴とする。According to an eleventh aspect of the present invention, in the seventh aspect, after the cushioning material is press-fitted into the hole for the PC steel from the inlet,
A spacer is fitted into the entrance.
【００２８】請求項１１の発明によれば、ＰＣ鋼材用孔
に緩衝材を圧入した後に、スペーサーでＰＣ鋼材とＰＣ
鋼材用孔との芯合わせが確実かつ簡単にできる。According to the eleventh aspect of the present invention, after the buffer material is press-fitted into the hole for the PC steel material, the PC steel material and the PC
Alignment with the steel hole can be performed reliably and easily.
【００２９】また請求項１２の発明が、請求項８におい
て、圧着グリップをＰＣ鋼材用孔の出口部に嵌入した
後、ＰＣ鋼材用孔の入口部にスペーサーを嵌入すること
を特徴とする。A twelfth aspect of the present invention is characterized in that, in the eighth aspect, the spacer is fitted into the inlet portion of the PC steel material hole after the pressure grip is fitted into the outlet portion of the PC steel material hole.
【００３０】請求項１２の発明によれば、スペーサでＰ
Ｃ鋼材とＰＣ鋼材用孔との芯合わせが確実かつ簡単にで
きる。According to the twelfth aspect of the invention, P
Alignment of the C steel material with the hole for the PC steel material can be performed reliably and easily.
【００３１】[0031]
【発明の実施の形態】以下、本発明のＰＣ鋼材の定着部
構造（以下、定着部構造という）およびＰＣ鋼材の定着
部における緩衝材の注入方法（以下、緩衝材の注入方法
という）の実施の形態を図面に基づいて詳細に説明す
る。はじめに定着部構造を説明し、その後に緩衝材の注
入方法について説明する。BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a fixing structure of a PC steel material according to the present invention (hereinafter referred to as a fixing portion structure) and a method of injecting a buffer material into a fixing portion of a PC steel material (hereinafter referred to as a method of injecting a buffer material). Will be described in detail with reference to the drawings. First, the structure of the fixing unit will be described, and then, a method of injecting a buffer material will be described.
【００３２】図１の（１）は定着部構造の第１の実施の
形態を示す断面図、（２）は（１）のＡ−Ａ線断面図、
（３）は（１）のＢ−Ｂ線断面図であり、前記定着部構
造１はカプラー２がにねじ込まれたアンカーヘッド３に
複数のＰＣ鋼より線４が定着されて構成されている。FIG. 1A is a cross-sectional view showing a first embodiment of the fixing unit structure, FIG. 1B is a cross-sectional view taken along line AA of FIG.
(3) is a cross-sectional view taken along the line BB of (1). The fixing unit structure 1 is configured by fixing a plurality of PC steel strands 4 to an anchor head 3 into which a coupler 2 is screwed.
【００３３】前記ＰＣ鋼よリ線４は、中心部の芯線５の
外周に複数の側線６が螺旋状に巻き付けられ、これら芯
線５と側線６との外面に合成樹脂製の被膜７が施され、
さらに被膜７の上に外周被膜８が施されている。このＰ
Ｃ鋼より線４の先端部が外周被膜８を剥離してアンカー
ヘッド３のＰＣ鋼材用孔９に挿入され、この入口部９ａ
に嵌入されたスペーサー１０でＰＣ鋼材用孔９との芯合
わせをしている。A plurality of side wires 6 are spirally wound around the outer periphery of the core wire 5 at the central portion of the PC steel wire 4, and a coating 7 made of a synthetic resin is applied to the outer surface of the core wire 5 and the side wire 6. ,
Further, an outer peripheral coating 8 is provided on the coating 7. This P
The distal end of the C steel strand 4 peels off the outer peripheral coating 8 and is inserted into the PC steel hole 9 of the anchor head 3.
The core 10 is aligned with the hole 9 for the PC steel material by the spacer 10 inserted into the hole.
【００３４】また出口部９ｂから導出された先端部には
圧着グリップ１１が引抜圧着され、その下端部がＰＣ鋼
材用孔の出口部９ｂに嵌合されてエンドプレート１２で
アンカーヘッド３に押しつけられている。前記圧着グリ
ップ１１の嵌入孔１３には楔片であるインサート１４が
嵌入され、その内面および外面に形成された断面鋸歯状
の突条１４ａがＰＣ鋼より線４の外面と嵌入孔１３の内
面に食い込んで、圧着グリップ１１から引き抜けないよ
うになっている。Further, a crimping grip 11 is pulled out and crimped to the distal end portion led out from the outlet portion 9b, and the lower end portion is fitted into the outlet portion 9b of the hole for PC steel, and is pressed against the anchor head 3 by the end plate 12. ing. An insert 14 which is a wedge piece is fitted into the fitting hole 13 of the crimping grip 11, and a ridge 14 a having a sawtooth cross section formed on the inner surface and the outer surface thereof is formed on the outer surface of the PC steel strand 4 and the inner surface of the fitting hole 13. It does not bite and pull out from the crimping grip 11.
【００３５】前記嵌入孔１３とＰＣ鋼材用孔９とにはエ
ポキシ樹脂、ポリブタジェン樹脂、不飽和ポリエステル
樹脂、ポリウレタン樹脂、ビニルエステル樹脂、シリコ
ン樹脂、メタクリル樹脂、ポリオレフィン樹脂などの緩
衝材１５が充填され、特にインサート１４とＰＣ鋼より
線４の間の緩衝材１５はＰＣ鋼より線４を二重に保護す
る役割を果たしている。この緩衝材１５はインサート１
４とＰＣ鋼材用孔９との内面に予め塗布するか、圧着グ
リップ１１を圧着した後に嵌入孔１３およびＰＣ鋼材用
孔９に圧入する。The fitting hole 13 and the hole 9 for PC steel material are filled with a buffer material 15 such as epoxy resin, polybutadiene resin, unsaturated polyester resin, polyurethane resin, vinyl ester resin, silicone resin, methacryl resin, polyolefin resin and the like. In particular, the cushioning material 15 between the insert 14 and the PC stranded wire 4 serves to double protect the PC stranded wire 4. This cushioning material 15 is the insert 1
4 or the inner surface of the PC steel hole 9 or press-fit into the fitting hole 13 and the PC steel hole 9 after crimping the crimping grip 11.
【００３６】図３は、第２の実施の形態の定着部構造１
６を示し、前記のＰＣ鋼より線４に代えて、芯線１７と
側線１８の外面に被膜７が施されていない裸のＰＣ鋼よ
り線１９を使用したものであり、この点以外は第１の実
施の形態の定着部構造１と同じ構成である。このような
裸のＰＣ鋼より線１９であっても緩衝材１５で保護され
ることにより、第１の実施の形態の定着部構造１と同じ
効果を奏することができる。FIG. 3 shows a fixing unit structure 1 according to the second embodiment.
6, a bare PC stranded wire 19 in which the outer surfaces of the core wire 17 and the side wire 18 are not coated 7 is used in place of the PC stranded wire 4 described above. This is the same configuration as the fixing unit structure 1 of the embodiment. Even if such a bare PC steel strand 19 is protected by the cushioning material 15, the same effect as the fixing part structure 1 of the first embodiment can be obtained.
【００３７】またＰＣ鋼材は第１および第２の実施の形
態のほかに、被膜を施したＰＣ鋼線やＰＣ鋼棒（図示せ
ず）、または被膜を施さないＰＣ鋼線やＰＣ鋼棒（図示
せず）を使用することもでき、これらも前記と同様の効
果を奏することができる。In addition to the first and second embodiments, the PC steel material may be a coated PC steel wire or a PC steel rod (not shown) or an uncoated PC steel wire or a PC steel rod (not shown). (Not shown) can also be used, and these can also provide the same effects as described above.
【００３８】次に、図４および図５に基づいて緩衝材の
注入方法の第１の実施の形態を詳細に説明する。本実施
の形態においては前記の第１の実施の形態のＰＣ鋼より
線４が使用され、まず、図４に示すように、先端部の外
周被膜が剥離されたＰＣ鋼より線４が、アンカーヘッド
３のＰＣ鋼材用孔９に挿入され、その出口部９ｂから導
出された部分に圧着グリップ１１が引抜圧着される。そ
して、この圧着グリップ１１の頂部に注入治具２０を押
し当ててエポキシ樹脂などの緩衝材１５を嵌入孔１３に
圧入すると、前記の緩衝材１５がインサート１４とＰＣ
鋼より線４の外面および嵌入孔１３の内面との間に充填
される。この緩衝材１５は各圧着グリップ１１ごとに充
填されてＰＣ鋼より線４やインサート１４を引張荷重や
錆から保護する。Next, a first embodiment of the method for injecting a cushioning material will be described in detail with reference to FIGS. In the present embodiment, the PC steel strand 4 of the first embodiment is used, and first, as shown in FIG. The crimping grip 11 is inserted into the PC steel hole 9 of the head 3, and is pulled out and crimped to a portion derived from the outlet 9 b. When the injection jig 20 is pressed against the top of the crimping grip 11 to press the cushioning material 15 such as epoxy resin into the fitting hole 13, the cushioning material 15 is inserted into the insert 14 and the PC.
The space between the outer surface of the steel strand 4 and the inner surface of the fitting hole 13 is filled. The cushioning material 15 is filled for each crimping grip 11 to protect the PC stranded wire 4 and the insert 14 from tensile load and rust.
【００３９】次に、図５に示すように、圧着グリップ１
１の下端部をＰＣ鋼材用孔９の出口部９ａに嵌入すると
ともに、圧着グリップ１１の頂部にエンドプレート１２
を取り付け、これをボルト２２でアンカーヘッド３に固
定する。このときＰＣ鋼より線４の外周被膜が剥離され
た部分８ａと、外周被膜が施された部分８ｂの一部がＰ
Ｃ鋼材用孔９内に挿入された状態になる。そして、この
孔の入口部９ａから前記と同様に緩衝材１５を圧入し、
これが出口部９ｂから漏出したところでその充満を確認
する。Next, as shown in FIG.
1 is fitted into the outlet 9a of the hole 9 for PC steel, and the end plate 12
And fix it to the anchor head 3 with bolts 22. At this time, the part 8a of the PC steel wire 4 from which the outer peripheral coating has been peeled off and a part of the part 8b to which the outer peripheral coating has been applied are P
It is inserted into the hole 9 for the C steel material. Then, the cushioning material 15 is press-fitted from the inlet portion 9a of the hole as described above,
When this leaks from the outlet 9b, the filling is confirmed.
【００４０】次に、ＰＣ鋼材用孔の入口部９ａにスペー
サー１０を嵌入してＰＣ鋼より線４とＰＣ鋼材用孔９と
の芯合わせをするとともに、プレート２１をアンカーヘ
ッド３にボルト２３で固定する。したがって外周被膜が
剥離された部分８ａもＰＣ鋼材用孔９内においては緩衝
材１５で被覆された状態になり、この緩衝材１５はＰＣ
鋼材用孔９から圧着グリップの嵌入孔１３にかけて充填
された状態になる。Next, a spacer 10 is inserted into the entrance 9a of the hole for the PC steel to align the core of the PC steel strand 4 with the hole 9 for the PC steel, and the plate 21 is attached to the anchor head 3 with the bolt 23. Fix it. Therefore, the portion 8a from which the outer peripheral coating has been peeled is also covered with the cushioning material 15 in the hole 9 for PC steel, and this cushioning material 15
The state is filled from the steel material hole 9 to the fitting hole 13 of the crimping grip.
【００４１】図６および図７は緩衝材の注入方法の第２
実施の形態であり、図６に示すように、まずアンカーヘ
ッド３のＰＣ鋼材用孔９の内面に予めエポキシ樹脂など
の緩衝材１５を塗布する。次に、図７に示すように、緩
衝材１５が塗布されたＰＣ鋼材用孔９に、先端部の外周
被膜８が剥離されたＰＣ鋼より線４が挿入され、その出
口部９ｂから導出された部分に圧着グリップ１１が引抜
圧着される。次に、圧着グリップ１１の嵌入孔１３にエ
ポキシ樹脂などの緩衝材１５を圧入し、この圧入が完了
したら前記と同様の方法で圧着グリップ１１をアンカー
ヘッド３に固定してＰＣ鋼材用孔９に緩衝材１５を圧入
する。FIGS. 6 and 7 show the second method of the buffer material injection method.
In the embodiment, as shown in FIG. 6, first, a buffer material 15 such as an epoxy resin is applied to the inner surface of the PC steel hole 9 of the anchor head 3 in advance. Next, as shown in FIG. 7, the PC steel stranded wire 4 from which the outer peripheral coating 8 has been peeled is inserted into the PC steel material hole 9 to which the cushioning material 15 has been applied, and is drawn out from the outlet 9b. The crimping grip 11 is pulled and crimped to the bent portion. Next, a cushioning material 15 such as an epoxy resin is press-fitted into the fitting hole 13 of the crimping grip 11. When the press-fitting is completed, the crimping grip 11 is fixed to the anchor head 3 in the same manner as described above, and is inserted into the PC steel material hole 9. The buffer material 15 is press-fitted.
【００４２】また上記の第１および第２の実施の形態に
おいてＰＣ鋼材は上記のほかに、被膜を施したＰＣ鋼線
やＰＣ鋼棒（図示せず）、または被膜を施さないＰＣ鋼
より線、ＰＣ鋼線、ＰＣ鋼棒（図示せず）を使用するこ
ともでき、これらも前記と同様の効果を奏することがで
きる。In the first and second embodiments, in addition to the above, the PC steel material may be a coated PC steel wire or a PC steel rod (not shown), or a non-coated PC steel stranded wire. , PC steel wire, and PC steel rod (not shown) can also be used, and these can also provide the same effects as described above.
【００４３】次に、第１および第２の実施の形態の定着
部構造１、１６におけるＰＣ鋼より線４、１９の引張疲
労強度試験について説明する。前記ＰＣ鋼より線４、１
９は７本よりで１５．２ｍｍ径であり、第１の実施の形
態の定着部構造１は芯線５と側線６との外面に被膜７が
施されたＰＣ鋼より線４を使用し、第２の実施の形態の
定着部構造１６は芯線１７と側線１８の外面に被膜７が
施されていない裸のＰＣ鋼より線１９を使用する。Next, a description will be given of a tensile fatigue strength test of the PC steel strands 4 and 19 in the fixing part structures 1 and 16 of the first and second embodiments. The PC steel strand 4, 1
9 is a 15.2 mm diameter from seven wires, and the fixing part structure 1 of the first embodiment uses a PC steel stranded wire 4 in which a coating 7 is applied to the outer surfaces of a core wire 5 and a side wire 6. The fixing portion structure 16 of the second embodiment uses a bare PC steel strand 19 in which the outer surfaces of the core wire 17 and the side wire 18 are not coated.
【００４４】この引張疲労強度試験は、上記の定着部構
造１、１６を両端部に備えたＰＣ鋼より線４、１９を、
図８に示すように、引張疲労試験機２４に取り付けて、
それに所定の繰返荷重を与えて引張疲労強度を調べるも
のである。この際、ＰＣ鋼より線４、１９の標点距離を
１０００ｍｍとした場合の繰返し上限応力時の伸び、お
よび下限応力時の伸びは以下の表２に示すようになっ
た。In this tensile fatigue strength test, PC steel stranded wires 4 and 19 having the above-mentioned fixing portion structures 1 and 16 at both ends were used.
As shown in FIG. 8, attached to the tensile fatigue tester 24,
A predetermined repetitive load is applied thereto to check the tensile fatigue strength. At this time, the elongation at the time of repeated upper limit stress and the elongation at the lower limit stress when the gauge length of the PC steel strands 4 and 19 was 1000 mm were as shown in Table 2 below.
【００４５】[0045]
【表２】 [Table 2]
【００４６】また、引張疲労強度の応力振幅を２５ｋｇ
／ｍｍ2または３０ｋｇ／ｍｍ2として２００万回の繰返
荷重をＰＣ鋼より線４、１９が受けた場合、これに耐え
る最低条件としてＰＣ鋼より線が平行部で破断すること
が必要であるが、第１および第２の実施の形態の定着部
構造１、１９を備えたＰＣ鋼より線４、１９は、この条
件を満たしている。The stress amplitude of the tensile fatigue strength is 25 kg.
/ 2 or 30 kg / mm 2 , when the PC steel strands 4 and 19 are subjected to a repetitive load of 2,000,000 times, it is necessary that the PC strands break at the parallel part as the minimum condition to withstand this. However, the PC steel strands 4 and 19 having the fixing unit structures 1 and 19 of the first and second embodiments satisfy this condition.
【００４７】表３は、第１および第２の実施の形態の定
着部構造１、１６を備えたＰＣ鋼より線４、１９の破断
状況を示し、表４はその引張疲労強度試験の結果を示し
たものである。この結果、これらのＰＣ鋼より線４、１
９は２００〜３００万回の繰返荷重でも破断しないこと
を確認することができた。Table 3 shows the breaking conditions of the PC steel strands 4 and 19 provided with the fixing part structures 1 and 16 of the first and second embodiments, and Table 4 shows the results of the tensile fatigue strength test. It is shown. As a result, these PC steel strands 4, 1
It was confirmed that No. 9 did not break even with a repeated load of 2 to 3 million times.
【００４８】[0048]
【表３】 [Table 3]
【００４９】[0049]
【表４】 [Table 4]
【００５０】[0050]
【発明の効果】ＰＣ鋼より線、ＰＣ鋼線、ＰＣ鋼棒の引
張疲労強度が大きくなる。As described above, the tensile fatigue strength of the PC steel strand, the PC steel wire, and the PC steel rod is increased.
【００５１】ＰＣ鋼より線の芯線と側線との外面、ＰＣ
鋼線の外面、ＰＣ鋼棒の外面の被膜により、ＰＣ鋼材用
孔と嵌入孔との入口部のＰＣ鋼材に作用する応力および
摩擦熱を吸収するとともに、芯線と側線との間に発生す
る摩擦熱からこれらを保護する。また圧着グリップの嵌
入孔と、アンアーヘッドのＰＣ鋼材用孔とにおけるＰＣ
鋼より線に作用する切欠力を弱くする。The outer surface of the core wire and side wire of the PC steel stranded wire, PC
The coating on the outer surface of the steel wire and the outer surface of the PC steel rod absorbs the stress and frictional heat acting on the PC steel at the entrance of the hole for the PC steel and the insertion hole, and friction generated between the core wire and the side wire. Protect these from heat. In addition, the PC in the insertion hole of the crimping grip and the hole for the PC steel material of the lower head is provided.
Reduces notch force acting on steel strands.
【００５２】圧着グリップがカプラーで保護される。The crimp grip is protected by the coupler.
【００５３】スペーサでＰＣ鋼材とＰＣ鋼材用孔との芯
合わせが確実かつ簡単にできる。The alignment between the PC steel material and the hole for the PC steel material can be reliably and easily performed by the spacer.
【００５４】圧着グリップをアンカーヘッドで支持する
ことができる。The crimp grip can be supported by the anchor head.
【００５５】圧着グリップの嵌入孔とアンカーヘッドの
ＰＣ鋼材用孔とに緩衝材を確実かつ簡単に圧入できる。The cushioning material can be securely and easily pressed into the fitting hole of the crimping grip and the hole for the PC steel of the anchor head.
【００５６】ＰＣ鋼材をせん断応力や摩擦熱から保護で
きる。The PC steel can be protected from shear stress and frictional heat.
【００５７】ＰＣ鋼材用孔に緩衝材を圧入した後に、ス
ペーサーでＰＣ鋼材とＰＣ鋼材用孔との芯合わせが確実
かつ簡単にできる。After press-fitting the cushioning material into the hole for the PC steel material, the alignment between the PC steel material and the hole for the PC steel material can be reliably and easily performed by the spacer.
【図１】（１）は第１の実施の形態の定着部構造の断面
図、（２）は（１）のＡ−Ａ線断面図、（３）は（１）
のＢ−Ｂ線断面図である。FIGS. 1A and 1B are cross-sectional views of a fixing unit structure according to a first embodiment, FIG. 1B is a cross-sectional view taken along line AA of FIG. 1A, and FIG.
FIG. 7 is a sectional view taken along line BB of FIG.
【図２】図１の（１）における要部の断面図、（２）は
（１）のＣ−Ｃ線断面図、（３）は同Ｄ−Ｄ線断面図、
（４）は同Ｅ−Ｅ線断面図である。FIG. 2 is a cross-sectional view of a main part in (1) of FIG. 1, (2) is a cross-sectional view taken along line CC of (1), (3) is a cross-sectional view taken along line DD of FIG.
(4) is a sectional view taken along the line EE.
【図３】（１）および（２）は第２の実施の形態の定着
部構造のＰＣ鋼より線の断面図である。FIGS. 3 (1) and (2) are cross-sectional views of a PC steel stranded wire of a fixing portion structure according to a second embodiment.
【図４】第１の実施の形態の緩衝材の注入方法の断面図
である。FIG. 4 is a cross-sectional view of a method of injecting a cushioning material according to the first embodiment.
【図５】第１の実施の形態の緩衝材の注入方法の断面図
である。FIG. 5 is a cross-sectional view of a method for injecting a cushioning material according to the first embodiment.
【図６】第２の実施の形態の緩衝材の注入方法の断面図
である。FIG. 6 is a cross-sectional view of a buffer material injection method according to a second embodiment.
【図７】第２の実施の形態の緩衝材の注入方法の断面図
である。FIG. 7 is a cross-sectional view of a buffer material injection method according to a second embodiment.
【図８】引張試験機の正面図である。FIG. 8 is a front view of the tensile tester.
【図９】従来の定着部構造の断面図である。FIG. 9 is a cross-sectional view of a conventional fixing unit structure.
１、１６ 定着部構造 ２、２９ カプラー ３、２５ アンカーヘッド ４、１９ ＰＣ鋼より線 ５、１７ 芯線 ６、１８ 側線 ７ 被膜 ８ 外周被膜 ９、２６ ＰＣ鋼材用孔 １０ スペーサー １１、２８ 圧着グリップ １２ エンドプレート １３ 嵌入孔 １４ インサート １５ 緩衝材 ２０ 注入治具 ２１ プレート ２２、２３ ボルト ２４ 引張疲労試験機 ２７ ＰＣ鋼材 1,16 Fixing part structure 2,29 Coupler 3,25 Anchor head 4,19 PC steel strand 5,17 Core wire 6,18 Side wire 7 Coating 8 Outer peripheral coating 9,26 PC steel material hole 10 Spacer 11,28 Crimping grip 12 End plate 13 Insertion hole 14 Insert 15 Buffer material 20 Injection jig 21 Plate 22, 23 Bolt 24 Tensile fatigue tester 27 PC steel
Claims (12)
ンカーヘッドのＰＣ鋼材用孔の出口部から導出され、か
つ圧着グリップの嵌入孔にインサートを介して嵌合さ
れ、前記嵌入孔とＰＣ鋼材用孔とに緩衝材が充填された
ことを特徴とするＰＣ鋼材の定着部構造。1. An end portion of a PC steel material from which an outer peripheral coating has been peeled is led out from an outlet portion of a PC steel material hole of an anchor head, and fitted into a fitting hole of a crimping grip via an insert. An anchoring structure for a PC steel material, wherein a buffer material is filled in a hole for the steel material.
Ｃ鋼棒のうちのいずれかであることを特徴とする請求項
１に記載のＰＣ鋼材の定着部構造。2. PC steel material is PC steel strand, PC steel wire, P steel
The fixing part structure of a PC steel material according to claim 1, wherein the fixing part is any one of C steel bars.
ＰＣ鋼線の外面、ＰＣ鋼棒の外面にはそれぞれ被膜が施
されたことを特徴とする請求項２に記載のＰＣ鋼材の定
着部構造。3. The outer surface of a core wire and a side wire of the PC steel stranded wire,
3. The fixing part structure of a PC steel material according to claim 2, wherein a coating is applied to an outer surface of the PC steel wire and an outer surface of the PC steel rod.
たことを特徴とする請求項１に記載のＰＣ鋼材の定着部
構造。4. The fixing part structure for a PC steel according to claim 1, wherein the anchor head is screwed into the coupler.
間にスペーサーが嵌合され、該スペーサーがＰＣ鋼材用
孔内にプレートで押し込まれたことを特徴とする請求項
１に記載のＰＣ鋼材の定着部構造。5. The PC steel material according to claim 1, wherein a spacer is fitted between the PC steel material hole and an inlet portion of the PC steel material material, and the spacer is pushed into the PC steel material hole by a plate. The fixing structure of PC steel material.
ーヘッドに押しつけられたことを特徴とする請求項１に
記載のＰＣ鋼材の定着部構造。6. The fixing structure according to claim 1, wherein the pressure grip is pressed against the anchor head by an end plate.
脂、ポリブタジェン樹脂、不飽和ポリエステル樹脂、ビ
ニルエステル樹脂、シリコン樹脂、メタクリル樹脂、ポ
リオレフィン樹脂のうちのいずれかであることを特徴と
する請求項１に記載のＰＣ鋼材の定着部構造。7. The method according to claim 1, wherein the buffer material is any one of an epoxy resin, a polyurethane resin, a polybutadiene resin, an unsaturated polyester resin, a vinyl ester resin, a silicone resin, a methacrylic resin, and a polyolefin resin. A fixing part structure of the PC steel material described in the above.
アンカーヘッドのＰＣ鋼材用孔の出口部から導出し、か
つ圧着グリップの嵌入孔にインサートを介して嵌合し、
前記圧着グリップの嵌入孔に緩衝材を圧入した後、該緩
衝材が圧入された圧着グリップをＰＣ鋼材用孔の出口部
に嵌入するとともに、前記ＰＣ鋼材用孔に入口部から緩
衝材を圧入することを特徴とするＰＣ鋼材の定着部にお
ける緩衝材の注入方法。8. An end portion of the PC steel material from which the outer peripheral coating has been peeled is led out from an outlet portion of the PC steel material hole of the anchor head, and fitted into an insertion hole of the crimping grip via an insert.
After press-fitting the cushioning material into the fitting hole of the crimping grip, the crimping grip into which the cushioning material is press-fitted is fitted into the outlet of the PC steel material hole, and the cushioning material is press-fitted into the PC steel material hole from the entrance. A method for injecting a cushioning material into a fixing section of a PC steel material, characterized in that:
緩衝材を塗布し、外周被膜が剥離されたＰＣ鋼材の端部
をＰＣ鋼材用孔の出口部から導出して圧着グリップの嵌
入孔にインサートを介して嵌合し、前記圧着グリップの
嵌入孔に緩衝材を圧入した後、該緩衝材を圧入した圧着
グリップをＰＣ鋼材用孔の出口部に嵌入することを特徴
とするＰＣ鋼材の定着部における緩衝材の注入方法。9. A buffer material is applied to the inner surface of the hole for the PC steel of the anchor head, and the end of the PC steel from which the outer peripheral coating has been peeled is led out from the outlet of the hole for the PC steel to be inserted into the fitting hole of the crimping grip. The fixing of the PC steel material, wherein after the buffer material is press-fitted into the fitting hole of the crimp grip, the crimp grip into which the buffer material is press-fitted is fitted into the outlet of the PC steel material hole. How to inject buffer material in the part.
樹脂、ポリブタジェン樹脂、不飽和ポリエステル樹脂、
ビニルエステル樹脂、シリコン樹脂、メタクリル樹脂、
ポリオレフィン樹脂のうちのいずれかであることを特徴
とする請求項８または９に記載のＰＣ鋼材の定着部にお
ける緩衝材の注入方法。10. The buffer material is epoxy resin, polyurethane resin, polybutadiene resin, unsaturated polyester resin,
Vinyl ester resin, silicone resin, methacrylic resin,
The method for injecting a cushioning material in a fixing section of a PC steel material according to claim 8 or 9, wherein the method is one of a polyolefin resin.
入した後に、前記入口部にスペーサーを嵌入することを
特徴とする請求項８に記載のＰＣ鋼材の定着部における
緩衝材の注入方法。11. The method for injecting a cushioning material into a fixing portion of a PC steel according to claim 8, wherein after a cushioning material is press-fitted into the hole for the PC steel from the entrance, a spacer is fitted into the entrance. .
に嵌入した後、ＰＣ鋼材用孔の入口部にスペーサーを嵌
入することを特徴とする請求項９に記載のＰＣ鋼材の定
着部における緩衝材の注入方法。12. The buffer in the anchoring section of the PC steel according to claim 9, wherein after inserting the pressure grip into the outlet of the hole for the PC steel, a spacer is inserted into the inlet of the hole for the PC steel. How to inject the material.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29103299A JP3330107B2 (en) | 1999-10-13 | 1999-10-13 | Structure of anchoring part of PC steel and method of injecting buffer material in anchoring part of PC steel |
| KR10-1999-0050177A KR100378705B1 (en) | 1999-10-13 | 1999-11-12 | A fixing portion structure of pc steel and pouring method of buffing materials at the fixing portion of pc steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29103299A JP3330107B2 (en) | 1999-10-13 | 1999-10-13 | Structure of anchoring part of PC steel and method of injecting buffer material in anchoring part of PC steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001107507A true JP2001107507A (en) | 2001-04-17 |
| JP3330107B2 JP3330107B2 (en) | 2002-09-30 |
Family
ID=17763571
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29103299A Expired - Fee Related JP3330107B2 (en) | 1999-10-13 | 1999-10-13 | Structure of anchoring part of PC steel and method of injecting buffer material in anchoring part of PC steel |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP3330107B2 (en) |
| KR (1) | KR100378705B1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100513357B1 (en) * | 2000-12-04 | 2005-09-07 | 프레이씨네 엥떼르나씨오날(에스떼위뻬) | Individually protected strand, its use in construction, and manufacturing process |
| CN103924516A (en) * | 2014-04-21 | 2014-07-16 | 江苏法尔胜缆索有限公司 | Novel and durable combined type suspension bridge main cable |
| GB2514621A (en) * | 2013-05-31 | 2014-12-03 | Vsl Int Ag | Cable anchorage |
| JP7348450B2 (en) | 2019-09-30 | 2023-09-21 | 住友電気工業株式会社 | Tensile anchoring structure |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101008128B1 (en) * | 2009-07-09 | 2011-01-13 | 이영희 | Cuff for blood-pressure measurement |
-
1999
- 1999-10-13 JP JP29103299A patent/JP3330107B2/en not_active Expired - Fee Related
- 1999-11-12 KR KR10-1999-0050177A patent/KR100378705B1/en not_active IP Right Cessation
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100513357B1 (en) * | 2000-12-04 | 2005-09-07 | 프레이씨네 엥떼르나씨오날(에스떼위뻬) | Individually protected strand, its use in construction, and manufacturing process |
| GB2514621A (en) * | 2013-05-31 | 2014-12-03 | Vsl Int Ag | Cable anchorage |
| GB2514621B (en) * | 2013-05-31 | 2020-04-15 | Vsl Int Ag | Cable anchorage |
| CN103924516A (en) * | 2014-04-21 | 2014-07-16 | 江苏法尔胜缆索有限公司 | Novel and durable combined type suspension bridge main cable |
| JP7348450B2 (en) | 2019-09-30 | 2023-09-21 | 住友電気工業株式会社 | Tensile anchoring structure |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20010039481A (en) | 2001-05-15 |
| JP3330107B2 (en) | 2002-09-30 |
| KR100378705B1 (en) | 2003-04-07 |
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