JP3330107B2 - Structure of anchoring part of PC steel and method of injecting buffer material in anchoring part of PC steel - Google Patents
Structure of anchoring part of PC steel and method of injecting buffer material in anchoring part of PC steelInfo
- Publication number
- JP3330107B2 JP3330107B2 JP29103299A JP29103299A JP3330107B2 JP 3330107 B2 JP3330107 B2 JP 3330107B2 JP 29103299 A JP29103299 A JP 29103299A JP 29103299 A JP29103299 A JP 29103299A JP 3330107 B2 JP3330107 B2 JP 3330107B2
- Authority
- JP
- Japan
- Prior art keywords
- steel
- hole
- resin
- steel material
- grip
- 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
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)
- Bridges Or Land Bridges (AREA)
- Piles And Underground Anchors (AREA)
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、PC鋼材の定着部構造の発明が、外周被膜
を剥離したPC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、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。また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含む。また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含む。またアン
カーヘッドはカプラーにねじ込まれたことを含む。また
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
つけられたことを含む。また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
ことを含む。またPC鋼材の定着部における緩衝材の注
入方法は、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。またアンカーヘッドのP
C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。また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
であることを含む。また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
ことを含む。また圧着グリップを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
入することを含む。 Means for solving the above-mentioned problems are as follows. The invention of the anchoring structure of the PC steel material is based on the fact that the end of the PC steel material from which the outer peripheral coating has been peeled off is the outlet of the PC steel material hole of the anchor head. It is drawn out from the part, and is fitted into the fitting hole of the crimping grip via an insert, the fitting hole and the hole for the PC steel are filled with a cushioning material, and the entrance of the hole for the PC steel is
A spacer is fitted between a PC steel material and the spacer.
Is pushed into the hole for PC steel by a plate . PC steel materials are PC steel strand, PC steel wire, PC
Including any of the steel bars. Also PC steel
The outer surface of the core wire and side wire of the lead wire, the outer surface of the PC steel wire,
The outer surfaces each include a coating. Also Ann
The car head includes being screwed into the coupler. Also
The crimp grip is pushed to the anchor head by the end plate
Including what was attached. The cushioning material is epoxy resin,
Urethane resin, polybutadiene resin, unsaturated polyester
Tell resin, vinyl ester resin, silicone resin, metal
Ryl resin or polyolefin resin
Including. In addition, note that cushioning material should be
The insertion method involves removing the end of the PC steel material from which the outer peripheral coating has been peeled off.
From the exit of the PC steel hole in the car head
Fitted into the fitting hole of the wearing grip via an insert,
After press-fitting the cushioning material into the fitting hole of the crimping grip,
Fits the press-fit grip into which the PC steel material is inserted
At the same time, buffer material is inserted into the PC steel hole from the entrance.
Is press-fitted. Also the anchor head P
Apply a cushioning material to the inner surface of the C steel material hole and peel the outer coating.
Out the end of the PC steel from the exit of the hole for PC steel
Into the insertion hole of the crimp grip via the insert,
After press-fitting the cushioning material into the fitting hole of the crimping grip,
Crimping grip with impact material pressed into the exit of PC steel hole
It is characterized by being fitted. The cushioning material is epoxy tree
Fat, polyurethane resin, polybutadiene resin, unsaturated resin
Ester resin, vinyl ester resin, silicone resin,
One of methacrylic resin and polyolefin resin
Including that Also buffered from the entrance to the hole for PC steel
After press-fitting the material, insert a spacer into the entrance
Including. In addition, the crimp grip is used for the exit of the hole
After fitting, the fitting of the spacer to the inlet portion of the PC steel material for a hole
Including entering.
【0008】PC鋼材の引張疲労強度が上昇する。また
PC鋼より線、PC鋼線、PC鋼棒の引張疲労強度が大
きくなる。またPC鋼より線の芯線と側線との外面、P
C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P
C鋼より線に作用する切欠力を弱くする。また圧着グリ
ップがカプラーで保護される。またスペーサによって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。また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。PC鋼材をせん断応力や摩擦熱から保護で
きる。また圧着グリップの嵌入孔とアンカーヘッドのP
C鋼材用孔とに緩衝材を確実かつ簡単に圧入できる。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。またPC鋼材をせん断応力や摩擦
熱から保護できる。また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。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。 [0008] The tensile fatigue strength of PC steel increases. Also
High tensile fatigue strength of PC steel strand, PC steel wire and PC steel rod
It will be good. In addition, the outer surface of the core wire and side wire of the PC steel stranded wire, P
By coating the outer surface of C steel wire and the outer surface of PC steel rod,
And stress acting on the PC steel at the entrance of the fitting hole and the fitting hole
Absorbs frictional heat and is generated between the core wire and the side wire.
Protect them from frictional heat. Also of the crimp grip
P at the insertion hole and the hole for PC steel of the lower head
Reduces the notch force acting on C steel strand. Also crimping tool
The tip is protected with a coupler. Also, P
Alignment between C steel and PC steel hole is reliable and easy.
Wear. Also, fix the crimp grip to the anchor head.
Can be. Protection of PC steel from shear stress and frictional heat
Wear. In addition, the insertion hole of the crimping grip and the P of the anchor head
The cushioning material can be securely and easily pressed into the hole for the C steel material. A
Reliable and easy cushioning material for PC steel hole of anchor head
You can enter. In addition, shear stress and friction of PC steel
Can protect from heat. Also, press the buffer material into the hole for PC steel.
After that, the center of the PC steel material and the hole for the PC steel material is aligned with the spacer.
Can be performed reliably and easily. Spacer and PC steel
Alignment with the hole for PC steel can be performed reliably and easily.
【0009】[0009]
【0010】[0010]
【0011】[0011]
【0012】[0012]
【0013】[0013]
【0014】[0014]
【0015】[0015]
【0016】[0016]
【0017】[0017]
【0018】[0018]
【0019】[0019]
【0020】[0020]
【0021】[0021]
【0022】[0022]
【0023】[0023]
【0024】[0024]
【0025】[0025]
【0026】[0026]
【0027】[0027]
【0028】[0028]
【0029】[0029]
【0030】[0030]
【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 achieved.
【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 inlet 9a of the PC steel hole to align the core of the PC steel strand 4 with the hole 9 of the PC steel, and the plate 21 is attached to the anchor head 3 with bolts 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 stranded wire 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 wire 5, 17 Core wire 6, 18 Side wire 7 Coating 8 Outer 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
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7,DB名) E04C 5/00 - 5/20 E04G 21/12 104 ──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. 7 , DB name) E04C 5/00-5/20 E04G 21/12 104
Claims (11)
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、
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. cushioning material is filled into a steel hole,
Spacer between PC steel and inlet of PC steel hole
Are fitted, and the spacer is placed in the hole for PC steel.
Fixing part structure of PC steel material, characterized in that it was pushed in .
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.
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. An outer surface of a core wire and a side wire of a PC steel stranded wire,
3. The fixing part structure of a PC steel material according to claim 2, wherein the outer surface of the steel wire and the outer surface of the PC steel bar are coated respectively.
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.
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-Characterized by being pressed against the head
記載のPC鋼材の定着部構造。A fixing part structure of the PC steel material described in the above.
脂、ポリブタジェン樹脂、不飽和ポリエステル樹脂、ビFat, polybutadiene resin, unsaturated polyester resin,
ニルエステル樹脂、シリコン樹脂、メタクリル樹脂、ポNylester resin, silicone resin, methacrylic resin,
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Characterized in that it is one of the polyolefin resins
する請求項1に記載のPC鋼材の定着部構造。The fixing part structure of a PC steel material according to claim 1.
アンカーヘッドのPC鋼材用孔の出口部から導出し、かDerived from the outlet of the PC steel hole in the anchor head,
つ圧着グリップの嵌入孔にインサートを介して嵌合し、Fits through the insert into the insertion hole of the crimp grip,
前記圧着グリップの嵌入孔に緩衝材を圧入した後、該緩After press-fitting the cushioning material into the fitting hole of the crimping grip,
衝材が圧入された圧着グリップをPC鋼材用孔の出口部The crimped grip with the impact material pressed into the exit of the hole for PC steel
に嵌入するとともに、前記PC鋼材用孔に入口部から緩Into the PC steel material hole from the entrance.
衝材を圧入することを特徴とするPC鋼材の定着部におIn the anchoring part of PC steel, which is characterized by press-fitting impact material
ける緩衝材の注入方法。How to inject buffer material.
緩衝材を塗布し、外周被膜が剥離されたPC鋼材の端部End of PC steel material with buffer material applied and outer coating removed
をPC鋼材用孔の出口部から導出して圧着グリップの嵌From the exit of the hole for PC steel material and fit the crimp grip
入孔にインサートを介して嵌合し、前記圧着グリップのFit the insertion hole through the insert,
嵌入孔に緩衝材を圧入した後、該緩衝材を圧入した圧着After press-fitting the buffer into the fitting hole, press-fit the buffer
グリップをPC鋼材用孔の出口部に嵌入Insert the grip into the exit of the hole for PC steel することを特徴Features to do
とするPC鋼材の定着部における緩衝材の注入方法。A method of injecting a buffer material into a fixing portion of a PC steel material.
脂、ポリブタジェン樹脂、不飽和ポリエステル樹脂、ビFat, polybutadiene resin, unsaturated polyester resin,
ニルエステル樹脂、シリコン樹脂、メタクリル樹脂、ポNylester resin, silicone resin, methacrylic resin,
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Characterized in that it is one of the polyolefin resins
する請求項7または8に記載のPC鋼材の定着部におけ9. The fixing part of the PC steel material according to claim 7 or 8.
る緩衝材の注入方法。Buffer material injection method.
入した後に、前記入口部にスペーサーを嵌入することをAfter insertion, it is necessary to insert a spacer into the entrance.
特徴とする請求項7に記載のPC鋼材の定着部におけるThe fixing part of the PC steel material according to claim 7, wherein
緩衝材の注入方法。How to inject cushioning material.
に嵌入した後、PC鋼材用孔の入口部にスペーサーを嵌After inserting into the hole, insert the spacer into the entrance of the PC steel hole.
入することを特徴とする請求項8に記載のPC鋼材の定9. The PC steel according to claim 8, wherein
着部における緩衝材の注入方法。A method of injecting a cushioning material at the attachment portion.
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 JP2001107507A (en) | 2001-04-17 |
JP3330107B2 true 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 (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2817566B1 (en) * | 2000-12-04 | 2003-02-07 | Freyssinet Int Stup | INDIVIDUALLY PROTECTED CORD, USE THEREOF IN CONSTRUCTION, AND MANUFACTURING METHOD |
DE20205149U1 (en) | 2002-04-03 | 2002-07-04 | DYWIDAG-Systems International GmbH, 85609 Aschheim | Corrosion-protected tension member, especially stay cable for a stay cable bridge |
KR101008128B1 (en) * | 2009-07-09 | 2011-01-13 | 이영희 | Cuff for blood-pressure measurement |
GB2514621B (en) * | 2013-05-31 | 2020-04-15 | 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 |
-
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 (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
Also Published As
Publication number | Publication date |
---|---|
JP2001107507A (en) | 2001-04-17 |
KR20010039481A (en) | 2001-05-15 |
KR100378705B1 (en) | 2003-04-07 |
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