JP3372522B2 - Non-pull type reaction force PC steel prestress force introduction device and prestress introduction method of concrete member using the device - Google Patents
Non-pull type reaction force PC steel prestress force introduction device and prestress introduction method of concrete member using the deviceInfo
- Publication number
- JP3372522B2 JP3372522B2 JP2000020162A JP2000020162A JP3372522B2 JP 3372522 B2 JP3372522 B2 JP 3372522B2 JP 2000020162 A JP2000020162 A JP 2000020162A JP 2000020162 A JP2000020162 A JP 2000020162A JP 3372522 B2 JP3372522 B2 JP 3372522B2
- Authority
- JP
- Japan
- Prior art keywords
- steel rod
- hollow
- reaction force
- steel
- rear end
- 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
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- Reinforcement Elements For Buildings (AREA)
Description
【0001】[0001]
【発明の属する技術分野】本発明は、コンクリート部材
またはコンクリート構造物を補強するために使用する反
力PC鋼材をノンプル方式(引き抜かない方式:換言す
ると据置方式)で使用するノンプル方式反力PC鋼材に
よるプレストレス力導入装置およびその装置を使用した
コンクリート部材等のプレストレス力導入方法に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a non-pull type reaction force PC steel material for using a reaction force PC steel material used to reinforce a concrete member or a concrete structure in a non-pull method (a non-pulling method: in other words, a stationary method). And a prestressing force introduction method for a concrete member or the like using the device.
【0002】[0002]
【従来の技術】従来、コンクリート製の柱、梁、下部構
造物、上部構造物、筒状構造物等のコンクリート部材あ
るいはコンクリート構造物を補強するために、中空PC
鋼棒とその中に配置されるPC鋼棒を使用したコンクリ
ート部材のプレストレス導入装置(登録商標:NAPP
ユニット)として、図8に示す装置が現在使用されてい
る。2. Description of the Related Art Conventionally, hollow PCs have been used to reinforce concrete members or concrete structures such as concrete columns, beams, lower structures, upper structures and tubular structures.
Prestressing equipment for concrete members using steel rods and PC steel rods placed therein (registered trademark: NAPP
The device shown in FIG. 8 is currently used as a unit.
【0003】このプレストレス導入装置(以下単にユニ
ットとも言う)は、鋼製中空PC鋼棒1の両端部外側を
ねじ切り加工して、雄ねじ部2,3を設け、前記一方の
雄ねじ部2に雌ねじ凹部15aを有するアンカー材15
を螺合固定すると共に、前記中空PC鋼棒1の他端側雄
ねじ部3の中間部にナットからなるアンカー部材25を
螺合し、中空PC鋼棒1内に中実の鋼製反力PC鋼棒4
0を挿入した後、アンカー部材25側の中空PC鋼棒1
の端部にさらに鋼製異形スリーブからなる支承筒7の前
端部の雌ねじ孔4を螺合し、押圧係止片11を前記反力
PC鋼棒40の後端に嵌装し、支承筒7の後部にストッ
パー8を螺合する構造になっている。In this prestress introduction device (hereinafter also simply referred to as a unit), the outer ends of a hollow steel steel bar 1 made of steel are threaded to provide male threads 2 and 3, and one male thread 2 is internally threaded. Anchor material 15 having a recess 15a
Is fixed by screwing, and an anchor member 25 made of a nut is screwed into an intermediate portion of the male screw portion 3 on the other end side of the hollow PC steel rod 1, so that a solid steel reaction force PC is inserted in the hollow PC steel rod 1. Steel rod 4
After inserting 0, the hollow PC steel rod 1 on the anchor member 25 side
The female screw hole 4 at the front end of the support cylinder 7 made of a deformed steel sleeve is screwed onto the end of the support cylinder 7, and the pressing locking piece 11 is fitted to the rear end of the reaction force PC steel rod 40. The structure is such that the stopper 8 is screwed into the rear part.
【0004】中空PC鋼棒1にプレストレス力を導入す
るには、図8に2点鎖線で示すように、前部フレーム4
3および後部フレーム44を複数の連結ロッド45で平
行に結合し、後部フレーム44側に油圧ジャッキ50を
備えた枠形フレーム42における前部フレーム43の透
孔に、アンカー部材25の前面(あるいは支承筒7の前
面)を、一対のフランジ付半筒状体を筒状に形成した2
分割型受片49を介して係合させて、油庄ジャッキ50
の反力をアンカー部材25の前面あるいは支承筒7の前
面にて取り、可動ピストン51の前端部に適宜アダプタ
ー46を介在させてこれに係合する押圧ロッド47の先
端部を押圧係止片11に係合し、この状態でジャッキ5
0を伸長することにより、押圧ロッド47を介して反力
PC鋼棒を押すことにより、中空PC鋼棒1を緊張し、
所定のプレストレス導入後、反力PC鋼棒40が元に戻
らないようにストッパー8を押圧係止片11の背面にま
で回動して圧着する。コンクリート部材21へのプレス
トレス導入は、上記ユニットを型枠内の所定位置に配置
し、コンクリート20を打設後、コンクリート20の強
度の発現を待って、ストッパー8を緩めることにより容
易に行われる。In order to introduce a prestressing force into the hollow PC steel rod 1, as shown by a chain double-dashed line in FIG.
3 and the rear frame 44 are connected in parallel by a plurality of connecting rods 45, and the front surface of the anchor member 25 (or the support member) is inserted into the through hole of the front frame 43 in the frame-shaped frame 42 having the hydraulic jack 50 on the rear frame 44 side. The front surface of the cylinder 7) is formed by forming a pair of flanged semi-cylindrical bodies into a cylindrical shape.
The oil type jack 50 is engaged with the split type receiving piece 49.
Is applied to the front surface of the anchor member 25 or the front surface of the support cylinder 7, and the tip end portion of the pressing rod 47 that engages with the adapter 46 at the front end portion of the movable piston 51 is pressed by the pressing locking piece 11. Engage with the jack 5 in this state
By stretching 0, the hollow PC steel rod 1 is tensioned by pushing the reaction force PC steel rod through the pressing rod 47,
After the predetermined pre-stress is introduced, the stopper 8 is rotated to the back surface of the pressing and locking piece 11 and pressure-bonded so that the reaction force PC steel rod 40 does not return to its original position. The prestress is introduced into the concrete member 21 by arranging the unit at a predetermined position in the form, placing the concrete 20, waiting for the strength of the concrete 20 to develop, and then loosening the stopper 8. .
【0005】中空PC鋼棒に導入されていた引張力は、
コンクリート20と中空PC鋼棒との付着により、その
反力をコンクリート20に伝えることで圧縮力をつくり
だす。すなわちコンクリート20にプレストレスが導入
される。The tensile force introduced into the hollow PC steel bar is
By adhering the concrete 20 and the hollow PC steel rod, the reaction force is transmitted to the concrete 20 to create a compressive force. That is, prestress is introduced into the concrete 20.
【0006】[0006]
【発明が解決しようとする課題】上記、従来のユニット
式装置では、図9に示すように、コンクリート20にプ
レストレスを導入した後、反力PC鋼棒40を抜き取
り、中空PC鋼棒1の端部にキャップ41を装冠し、モ
ルタル23を切り欠き部22に充填する際にモルタル2
3が中空PC鋼棒1内へ流入するのを防いでいる。然る
に、現場では比較的短いユニットのプレストレス力導入
装置を便用するケースが多く、反力PC鋼棒40の抜き
取りおよび撤去作業、キャップ41を装着する作業が以
外に手間が掛かり、また、ユニットの製造が現場から遠
く離れた工場で行われることから、反力PC鋼棒40の
再利用というシステムは、コスト高になることが判明し
た。In the above-mentioned conventional unit type device, as shown in FIG. 9, after the prestress is introduced into the concrete 20, the reaction force PC steel rod 40 is pulled out to remove the hollow PC steel rod 1. When the cap 41 is attached to the end and the mortar 23 is filled in the notch 22, the mortar 2
3 is prevented from flowing into the hollow PC steel rod 1. However, in the field, there are many cases where the prestressing force introduction device of a relatively short unit is used, and the work of extracting and removing the reaction force PC steel rod 40 and the work of mounting the cap 41 take time and labor, and the unit It was found that the system of reusing the reaction force PC steel bar 40 is costly because the manufacturing of the steel is performed in a factory far from the site.
【0007】さらに、施主によっては、反力PC鋼棒を
抜き取った後の中空PC鋼棒内にグラウト材を注入する
よう求める施主もあり、反力PC鋼棒40を抜き取るシ
ステムは次第に敬遠されるようになった。そこで検討の
結果、プレストレス導入後、反力PC鋼棒40をノンプ
ル方式にして(引き抜かない方式にして)そのまま中空
PC鋼棒1内に残存する(据え置く)方がコストの面で
有利であることが判明した。その際、圧縮状態から解放
された反力PC鋼棒40は、元の長さに戻り、中空PC
鋼棒1の端部から突出してしまい、キャップ41を装冠
できない状態が生ずることが分かった。また、残存する
反力PC鋼棒40の再利用の間題がある。本発明はこの
ような知見に基づいて発明を完成した。Further, some owners demand that the grout material be injected into the hollow PC steel rod after the reaction force PC steel rod is pulled out, and the system for pulling out the reaction force PC steel rod 40 is gradually shunned. It became so. Therefore, as a result of the examination, it is more advantageous in terms of cost to leave the reaction force PC steel rod 40 in the hollow PC steel rod 1 as it is (to leave it stationary) after the prestress is introduced into the non-pull type (without pulling out). It has been found. At that time, the reaction force PC steel rod 40 released from the compressed state returns to the original length, and the hollow PC
It was found that the state in which the cap 41 cannot be crowned by protruding from the end of the steel rod 1 occurs. There is also a problem of reusing the remaining reaction force PC steel rod 40. The present invention has been completed based on these findings.
【0008】本発明は、以上に述べた従来の装置(ユニ
ット)の問題点を解決せんとしたものであり、比較的長
尺の反力PC鋼棒40を引き抜くことをしないノンプル
方式とし、中空PC鋼棒1内に据え置くことができるよ
うに、またその場合にPC鋼棒を据え置いた状態におい
て有効に再利用できる装置を提供することにある。The present invention is intended to solve the above-mentioned problems of the conventional device (unit), and employs a non-pull system in which the relatively long reaction force PC steel rod 40 is not pulled out and is hollow. An object of the present invention is to provide a device that can be placed in the PC steel rod 1 and can be effectively reused in the case where the PC steel rod is placed stationary.
【0009】[0009]
【問題を解決するための手段】前記の従来の問題点を有
利に解決するために、本発明の請求項1のノンプル方式
反力PC鋼材によるプレストレス力導入装置において
は、後端部外側に雄ねじ部3を有する中空PC鋼棒1の
前記雄ねじ部3に、前後両端部に雌ねじ孔4,5を有す
ると共に多角形の回動工具係合用外面6を有する支承筒
7における前端部の雌ねじ孔4が螺合連結され、その支
承筒7の後端部の雌ねじ孔5にストッパー8が螺合さ
れ、前記ストッパー8の前端部に前記支承筒7内に配置
された押圧係止片11の後部が係合され、前記中空PC
鋼棒1に挿入配置され押圧された状態の押込み用反力P
C鋼棒14の後端部が前記押圧係止片11の前部に係合
され、前記押込み用反力PC鋼棒14の前端部が前記中
空PC鋼棒1の前端部に固定されたアンカー材15に当
接または螺合され、前記中空PC鋼棒の中間部外側にア
ンカー部材25を備えたコンクリート用プレストレス力
導入装置において、前記押込み用反力PC鋼棒14が、
前記中空PC鋼棒1内に挿入配置された前部側のノンプ
ル用反力PC鋼棒13と、前記中空PC鋼棒1内に配置
されると共にその後端部から突出するように配置された
後部側の撤去用反力PC鋼棒12とにより構成されてい
ることを特徴とする。In order to advantageously solve the above-mentioned conventional problems, in the prestressing force introduction device using the non-pull type reaction force PC steel material according to claim 1 of the present invention, the outside of the rear end portion is provided. In the male screw portion 3 of the hollow PC steel rod 1 having the male screw portion 3, female screw holes 4 and 5 are provided at both front and rear ends and a female screw hole at the front end portion of the support cylinder 7 having a polygonal rotary tool engaging outer surface 6. 4 is screwed and coupled, a stopper 8 is screwed into a female screw hole 5 at the rear end of the support cylinder 7, and a rear end of a pressing engagement piece 11 arranged in the support cylinder 7 at the front end of the stopper 8. Is engaged with the hollow PC
Pushing reaction force P inserted into the steel rod 1 and pressed
An anchor in which the rear end portion of the C steel rod 14 is engaged with the front portion of the pressing locking piece 11, and the front end portion of the pushing reaction force PC steel rod 14 is fixed to the front end portion of the hollow PC steel rod 1. in wood 15 equivalents
In the prestressing force introduction device for concrete, which is contacted or screwed and has an anchor member 25 on the outside of the middle portion of the hollow PC steel rod, the pushing reaction force PC steel rod 14 is
A front-side non-pull reaction force PC steel rod 13 inserted and arranged in the hollow PC steel rod 1 and a rear portion arranged in the hollow PC steel rod 1 and projecting from a rear end thereof. It is characterized in that it is composed of the side reaction PC steel rod 12 for removal.
【0010】また請求項2のノンプル方式反力PC鋼材
によるプレストレス力導入装置においては、請求項1の
前提とする前記コンクリート用プレストレス力導入装置
において、前記押込み用反力PC鋼棒14が、前記中空
PC鋼棒1よりも短尺のノンプル用反力PC鋼棒とさ
れ、かつ前記押圧係止片11が前記中空PC鋼棒1内に
配置されると共にその後端部から突出するように配置さ
れた前部側の棒状部分と前記ストッパー8に係合する後
部側の版状部分とにより構成されていることを特徴とす
る。さらに請求項3のノンプル方式反力PC鋼材による
プレストレス力導入装置においては、後端部外側に雄ね
じ部3を有する中空PC鋼棒1の前記雄ねじ部3に、前
後両端部に雌ねじ孔4,5を有すると共に多角形の回動
工具係合用外面6を有する支承筒7における前端部の雌
ねじ孔4が螺合連結され、その支承筒7の後端部の雌ね
じ孔5にストッパー8が螺合され、前記ストッパー8の
前端部に前記支承筒7内に配置された押圧係止片11の
後部が係合され、前記中空PC鋼棒1に挿入配置され押
圧された状態の押込み用反力PC鋼棒14の後端部が前
記押圧係止片11の前部に係合され、前記押込み用反力
PC鋼棒14の前端部が前記中空PC鋼棒1の前端部に
固定されたアンカー材15に螺合され、前記中空PC鋼
棒の中間部外側にアンカー部材25を備えたコンクリー
ト用プレストレス力導入装置において、前記押込み用反
力PC鋼棒14の前端部が前記アンカー材に螺合固定さ
れると共に後端部が前記中空PC鋼棒1の後端部から突
出するように配置され、前記押込み用反力PC鋼棒14
の後端部に、前記押込み用反力PC鋼棒固定用のナット
螺合用雄ねじ部が形成されて、前記押込み用反力PC鋼
棒14がノンプル用反力PC鋼棒とされていることを特
徴とする。Further, in the prestressing force introduction device using the non-pull type reaction force PC steel material of claim 2, in the prestressing force introduction device for concrete which is the premise of claim 1, the pushing reaction force PC steel rod 14 is , A non-pulling reaction force PC steel rod shorter than the hollow PC steel rod 1, and the pressure locking piece 11 is disposed in the hollow PC steel rod 1 and protrudes from the rear end thereof. It is characterized in that it is constituted by a bar-shaped portion on the front side that is formed and a plate-shaped portion on the rear side that engages with the stopper 8. Further, in the prestress force introduction device using the non-pull type reaction force PC steel material according to claim 3, there is a bend on the outside of the rear end portion.
In the male screw part 3 of the hollow PC steel rod 1 having the threaded part 3,
It has female screw holes 4 and 5 at both ends of the rear, and it also has a polygonal rotation.
A female at the front end of the bearing cylinder 7 having the tool engaging outer surface 6
The female hole at the rear end of the support cylinder 7 is screw-connected to the screw hole 4.
A stopper 8 is screwed into the same hole 5, and the stopper 8
At the front end of the pressure locking piece 11 arranged in the support cylinder 7,
The rear part is engaged and inserted into the hollow PC steel rod 1 and pushed.
Pushing reaction force PC steel rod 14 in the pressed state
The pushing reaction piece is engaged with the front portion of the pressing locking piece 11,
The front end of the PC steel rod 14 is the front end of the hollow PC steel rod 1.
The hollow PC steel is screwed into the fixed anchor material 15.
Concree with anchor member 25 on the outside of the middle part of the rod
In the prestressing force introduction device for the tongue, the front end portion of the pushing reaction force PC steel rod 14 is screwed and fixed to the anchor material, and the rear end portion projects from the rear end portion of the hollow PC steel rod 1. And the reaction force PC steel rod 14 for pushing.
At the rear end portion, a male screw portion for fixing the pushing reaction force PC steel rod is formed so that the pushing reaction force PC steel rod 14 is a non-pulling reaction force PC steel rod. Characterize.
【0011】さらにまた請求項4のノンプル方式反力P
C鋼材によるプレストレス力導入装置においては、後端
部外側に雄ねじ部3を有する中空PC鋼棒1の前記雄ね
じ部3に、前後両端部に雌ねじ孔4,5を有すると共に
多角形の回動工具係合用外面6を有する支承筒7におけ
る前端部の雌ねじ孔4が螺合連結され、その支承筒7の
後端部の雌ねじ孔5にストッパー8が螺合され、前記ス
トッパー8の前端部に前記支承筒7内に配置された押圧
係止片11の後部が係合され、前記中空PC鋼棒1に挿
入配置され押圧された状態の押込み用PC鋼材14の後
端部が前記押圧係止片11の前部に係合され、前記押込
み用PC鋼材14の前端部が前記中空PC鋼棒1の前端
部に固定されたアンカー材15に当接され、前記中空P
C鋼棒の中間部外側にアンカー部材25を備えたコンク
リート用プレストレス力導入装置において、前記押込み
用PC鋼材14が、前記中空PC鋼棒1よりも短尺の複
数のPC鋼線とその外周面に螺旋状に配設された螺旋状
鉄筋とにより構成されたノンプル用反力PC鋼材とさ
れ、かつ前記押圧係止片11が、ノンプル用反力PC鋼
材に係合し前記中空PC鋼棒1内に配置されると共にそ
の後端部から突出するように配置された前部側の棒状部
分と前記ストッパー8に係合する後部側の版状部分とに
より構成されていることを特徴とする。また請求項5の
ノンプル方式反力PC鋼材によるプレストレス力導入装
置においては、請求項1、2、3、4の何れかに記載の
発明において、前記中空PC鋼棒1とその内側に配置さ
れるノンプル用反力PC鋼棒等のノンプル用反力PC鋼
材との間隙に経時硬化性樹脂が充填されていることを特
徴とする。Furthermore, the non-pull type reaction force P of claim 4
In the prestressing force introduction device with C steel material, the rear end
The male part of the hollow PC steel rod 1 having the male screw part 3 on the outside of the part
The threaded portion 3 has female screw holes 4 and 5 at both front and rear ends and
In a bearing cylinder 7 having a polygonal rotary tool engaging outer surface 6
The female screw hole 4 at the front end is
A stopper 8 is screwed into the female screw hole 5 at the rear end,
A pressing member arranged in the support cylinder 7 at the front end of the topper 8.
The rear portion of the locking piece 11 is engaged and inserted into the hollow PC steel rod 1.
After the PC steel material 14 for pushing in the state of being placed and pressed
The end portion is engaged with the front portion of the pressing locking piece 11,
The front end portion of the PC steel material 14 for grinding is the front end of the hollow PC steel rod 1.
The hollow P is brought into contact with the anchor material 15 fixed to the hollow portion.
Conc with an anchor member 25 on the outside of the middle part of the C steel rod
In the pre-stress force introduction device for reed, the indenting PC steel material 14 is composed of a plurality of PC steel wires shorter than the hollow PC steel rod 1 and spiral rebars spirally arranged on the outer peripheral surface thereof. So that the pressure locking piece 11 engages with the reaction force PC steel material for non-pull and is arranged in the hollow PC steel rod 1 and protrudes from the rear end thereof. It is characterized in that it is constituted by a bar-shaped portion on the front side that is arranged and a plate-shaped portion on the rear side that engages with the stopper 8. Further, in the prestressing force introduction device using the non-pull type reaction force PC steel material according to claim 5, in the invention according to any one of claims 1, 2, 3 and 4, the hollow PC steel rod 1 and the inside thereof are arranged. It is characterized in that the time-curable resin is filled in a gap between the non-pull reaction force PC steel rod and the non-pull reaction force PC steel material.
【0012】また請求項6のノンプル方式反力PC鋼材
用プレストレス力導入装置を使用したコンクリート部材
のプレストレス導入方法においては、後端部外側に雄ね
じ部3を有する中空PC鋼棒1の前記雄ねじ部3に、前
後両端部に雌ねじ孔4,5を有すると共に多角形の回動
工具係合用外面6を有する支承筒7における前端部の雌
ねじ孔4が螺合連結され、その支承筒7の後端部の雌ね
じ孔5にストッパー8が螺合され、前記ストッパー8の
前端部に前記支承筒7内に配置された押圧係止片11の
後部が係合され、前記中空PC鋼棒1に挿入配置され押
圧された状態の押込み用反力PC鋼棒14の後端部が前
記押圧係止片11の前部に係合され、前記押込み用反力
PC鋼棒14の前端部が前記中空PC鋼棒1の前端部に
固定されたアンカー材15に当接または螺合され、前記
中空PC鋼棒の中間部外側にアンカー部材25を備えて
おり、前記押込み用反力PC鋼棒14が、前記中空PC
鋼棒1内に挿入配置された前部側のノンプル用反力PC
鋼棒13と、前記中空PC鋼棒1内に配置されると共に
その後端部から突出するように配置された後部側の撤去
用反力PC鋼棒12とにより構成されたノンプル方式反
力PC鋼材によるプレストレス力導入装置における前記
アンカー材15およびアンカー部材25をコンクリート
中に埋め込むと共に前記支承筒7をコンクリート部材の
凹部において露出するように前記中空PC鋼棒1の周り
にコンクリート20を打設し、前記コンクリート20の
養生を終了した後、前記支承筒7および撤去用反力PC
鋼棒を撤去してコンクリートにプレストレスを導入した
後、前記ノンプル用反力PC鋼棒に係合するようにキャ
ップを中空PC鋼棒1に装着し、前記キャップを埋め込
むように前記凹部にモルタルを充填することを特徴とす
る。Further, in the prestressing method for the concrete member using the prestressing force introducing device for the non-pull type reaction force PC steel material according to claim 6, the hollow PC steel rod 1 having the male screw portion 3 on the outer side of the rear end is provided. The male screw portion 3 is screw-connected to the female screw hole 4 at the front end of the bearing cylinder 7 having female screw holes 4 and 5 at the front and rear ends and having a polygonal rotary tool engaging outer surface 6. A stopper 8 is screwed into the female screw hole 5 at the rear end, and the front end of the stopper 8 is engaged with the rear part of the pressure locking piece 11 arranged in the support cylinder 7, so that the hollow PC steel rod 1 is connected to the hollow PC steel rod 1. The rear end portion of the pushing reaction force PC steel rod 14 in the inserted and pressed state is engaged with the front portion of the pressing locking piece 11, and the front end portion of the pushing reaction force PC steel rod 14 is the hollow. Anchor fixed to the front end of PC steel rod 1. Engaged abutment or screw in wood 15, wherein comprises an anchor member 25 to the intermediate portion outside of the hollow PC steel rod, said pushing reaction force PC steel bar 14, the hollow PC
Front side non-pull reaction force PC inserted into the steel rod 1
A non-pull type reaction force PC steel material composed of a steel rod 13 and a rear-side reaction force PC steel rod 12 for removal, which is disposed in the hollow PC steel rod 1 and protrudes from the rear end thereof. The anchor material 15 and the anchor member 25 in the prestressing force introduction device by the above are embedded in concrete, and concrete 20 is placed around the hollow PC steel rod 1 so that the support cylinder 7 is exposed in the recess of the concrete member. , After the curing of the concrete 20 is completed, the support cylinder 7 and the reaction force PC for removal
After removing the steel rod and introducing prestress to the concrete, a cap is attached to the hollow PC steel rod 1 so as to engage with the reaction force PC steel rod for non-pull, and the mortar is inserted into the recess so as to embed the cap. It is characterized by filling.
【0013】また請求項7のノンプル方式反力PC鋼材
用プレストレス力導入装置を使用したコンクリート部材
のプレストレス導入方法においては、後端部外側に雄ね
じ部3を有する中空PC鋼棒1の前記雄ねじ部3に、前
後両端部に雌ねじ孔4,5を有すると共に多角形の回動
工具係合用外面6を有する支承筒7における前端部の雌
ねじ孔4が螺合連結され、その支承筒7の後端部の雌ね
じ孔5にストッパー8が螺合され、前記ストッパー8の
前端部に前記支承筒7内に配置された押圧係止片11の
後部が係合され、前記中空PC鋼棒1に挿入配置され押
圧された状態のノンプル用PC鋼棒14の後端部が前記
押圧係止片11の前部に係合され、前記押込み用反力P
C鋼棒14の前端部が前記中空PC鋼棒1の前端部に固
定されたアンカー材15に当接または螺合され、前記中
空PC鋼棒の中間部外側にアンカー部材25を備えてお
り、前記中空PC鋼棒1の後端部から突出する前記押込
み用反力PC鋼棒14の後端部に雄ねじ部27が設けら
れてノンプル方式反力PC鋼材用プレストレス力導入装
置が構成され、その装置における前記アンカー材15お
よびアンカー部材25をコンクリート中に埋め込むよう
に前記中空PC鋼棒1の周りにコンクリート20を打設
し、前記コンクリート20の養生を終了した後、前記支
承筒7を撤去してコンクリートにプレストレスを導入
し、その後前記中空PC鋼棒1に支圧プレートおよび座
金を嵌設し、前記ノンプル用PC鋼棒14の後端部の雄
ねじ部27に螺合すると共に、前記中空PC鋼棒1の後
端部に係合した反力PC鋼棒定着用ナットにより、前記
ノンプル用反力PC鋼棒を緊張した状態で定着すること
を特徴とする。Further, in a prestressing method for introducing a concrete member using the prestressing force introducing device for a non-pull type reaction force PC steel material according to claim 7, the hollow PC steel rod 1 having the male screw portion 3 on the outer side of the rear end is provided. The male screw portion 3 is screw-connected to the female screw hole 4 at the front end of the bearing cylinder 7 having female screw holes 4 and 5 at the front and rear ends and having a polygonal rotary tool engaging outer surface 6. A stopper 8 is screwed into the female screw hole 5 at the rear end, and the front end of the stopper 8 is engaged with the rear part of the pressure locking piece 11 arranged in the support cylinder 7, so that the hollow PC steel rod 1 is connected to the hollow PC steel rod 1. The rear end portion of the non-pull PC steel rod 14 in the inserted and pressed state is engaged with the front portion of the pressing locking piece 11, and the pushing reaction force P
The front end portion of the C steel rod 14 is brought into contact with or screwed to the anchor material 15 fixed to the front end portion of the hollow PC steel rod 1, and an anchor member 25 is provided outside the middle portion of the hollow PC steel rod. A male screw portion 27 is provided at the rear end portion of the pushing reaction force PC steel rod 14 protruding from the rear end portion of the hollow PC steel rod 1 to form a prestress force introduction device for a non-pull type reaction force PC steel material. Concrete 20 is placed around the hollow PC steel rod 1 so that the anchor material 15 and the anchor member 25 in the apparatus are embedded in the concrete, and after the curing of the concrete 20 is completed, the support cylinder 7 is removed. Then, a prestress is introduced into the concrete, and then a bearing plate and a washer are fitted into the hollow PC steel rod 1 and screwed into the male screw portion 27 at the rear end of the non-pull PC steel rod 14. Together, by a reaction force PC steel rod fixing nut engaged with the rear end portion of the hollow PC steel bars 1, characterized in that fixing in taut reaction force PC steel bars for the Nonpuru.
【0014】[0014]
【0015】[0015]
【発明の実施の形態】次にこの発明を図示の実施形態に
基づいて詳細に説明する。図1(a)は、本発明の一実
施形態の中空PC鋼棒を使用したコンクリート用プレス
トレス力導入装置の1ユニットの一部切欠側面図を示
し、(b)はその縦断側面図を示すものであって、鋼製
中空PC鋼棒本体1aの長手方向の一端部(前端部)外
側に雄ねじ部2を有すると共に、他端部(後端部)外側
に雄ねじ部3を有する中空PC鋼棒1における前記雄ね
じ部3に、前後両端部に雌ねじ孔4、5を有すると共に
多角形の回動工具係合用外面6を有する支承筒7におけ
る前端部の雌ねじ孔4が螺合連結されている。BEST MODE FOR CARRYING OUT THE INVENTION Next, the present invention will be described in detail based on the illustrated embodiments. FIG. 1 (a) shows a partially cutaway side view of one unit of a prestressing force introduction device for concrete using a hollow PC steel rod according to an embodiment of the present invention, and FIG. 1 (b) shows a longitudinal side view thereof. Hollow PC steel having a male threaded portion 2 on the outer side of one end (front end) in the longitudinal direction of the steel hollow PC steel rod body 1a and a male threaded portion 3 on the outer end of the other end (rear end). The male screw portion 3 of the rod 1 is screw-connected to the female screw holes 4 and 5 at both front and rear ends and the female screw hole 4 at the front end of the support cylinder 7 having the polygonal rotary tool engaging outer surface 6. .
【0016】前記支承筒7の後端部の雌ねじ孔5に、鋼
製筒状の環状係止片からなるストッパー8の前部雄ねじ
部8aが螺合され、前記ストッパー8の後端部外側に
は、回動工具係合用外面9が形成され、前記ストッパー
8の前端部には、前記支承筒7の内部に配置され、前端
部に凹部10を有する押圧係止片11の後端面が係合さ
れ、前記押圧係止片11の前端部の凹部10には、中空
PC鋼棒1内に一端側が挿入され、かつ他端側が前記中
空PC鋼棒1の他端部から突出するように配置された短
尺の撤去用反力PC鋼棒12の後端部が嵌合され、前記
撤去用反力PC鋼棒12の前端部には、前記中空PC鋼
棒1内に全体が収納された状態で配置されるノンプル用
反力PC鋼棒13の後端部が当接されている。この実施
形態においては、前記撤去用反力PC鋼棒12と前記ノ
ンプル用反力PC鋼棒13とにより、押し込み用反力P
C鋼棒14が構成されている。前記中空PC鋼棒1の前
端部外側の雄ねじ2に、雌ねじ凹部15aを有するナッ
トからなるアンカー材15が着脱自在に螺合固定され、
前記ノンプル用反力PC鋼棒13の先端部は前記雌ねじ
凹部15aの底面に当接されている。A front male screw portion 8a of a stopper 8 made of a steel tubular annular locking piece is screwed into the female screw hole 5 at the rear end portion of the support cylinder 7 so that the rear end portion of the stopper 8 is outside. The rotary tool engaging outer surface 9 is formed, and the rear end surface of the pressing engagement piece 11 which is disposed inside the support cylinder 7 and has the recess 10 at the front end is engaged with the front end of the stopper 8. One end side is inserted into the hollow PC steel rod 1 and the other end side is arranged so as to project from the other end portion of the hollow PC steel rod 1 in the recess 10 at the front end portion of the pressing engagement piece 11. The short end of the reaction PC steel rod for removal 12 is fitted with the rear end thereof, and the front end of the reaction PC steel rod for removal 12 is entirely housed in the hollow PC steel rod 1. The rear end portion of the non-pull reaction force PC steel rod 13 to be arranged is in contact. In this embodiment, the pushing reaction force P is made by the removal reaction force PC steel rod 12 and the non-pull reaction force PC steel rod 13.
The C steel rod 14 is configured. An anchor material 15 made of a nut having a female screw recess 15a is detachably screwed and fixed to the male screw 2 outside the front end of the hollow PC steel rod 1.
The tip portion of the non-pulling reaction force PC steel rod 13 is in contact with the bottom surface of the female screw recess 15a.
【0017】図1に示す状態は、図8に示すような状態
に本発明の装置を枠形フレーム42に配置して、液圧ジ
ャッキ50を利用して、その可動ピストン51の先端部
に係合され、ストッパー8の中央中空部に挿入される押
し込み鋼棒16により押圧係止片11を前記中空PC鋼
棒1に向かって移動するように押圧し、前記撤去用反力
PC鋼棒12およびノンプル(据置)用反力PC鋼棒1
3を中空PC鋼棒1内に押し込むように圧縮力を導入し
た後、その状態においてフリーになっている前記支承筒
7またはストッパー8を前記押圧係止片11に向かって
接近する方向(図1の右方向)に回転させて、前記スト
ッパー8を前進移動して、ストッパー8の前端部を押し
込み係止片11に係合させ、枠形フレーム42から分離
させた状態を示した図である。In the state shown in FIG. 1, the apparatus of the present invention is placed in the frame 42 in the state shown in FIG. 8, and the hydraulic jack 50 is used to engage the tip of the movable piston 51. And the pressing locking piece 11 is pressed by the pushing steel rod 16 inserted into the central hollow portion of the stopper 8 so as to move toward the hollow PC steel rod 1, and the removal reaction force PC steel rod 12 and Non-pull (stationary) reaction force PC steel rod 1
After a compressive force is introduced so as to push 3 into the hollow PC steel rod 1, the supporting cylinder 7 or the stopper 8 which is free in that state approaches the pressing engagement piece 11 (FIG. 1). It is a diagram showing a state in which the stopper 8 is moved forward, the front end portion of the stopper 8 is pushed in and engaged with the locking piece 11, and separated from the frame frame 42 by rotating the stopper 8 forward.
【0018】この第1実施形態の場合には、前記支承筒
7を中空PC鋼棒1から取り外し、コンクリート20の
硬化した後に硬化し、中空PC鋼棒1とノンプル用反力
PC鋼棒13の一体性を高め、コンクリート部材の終局
耐力を向上させるため、適宜遅延剤を硬化型接着剤に混
合させてなる経時硬化型の合成樹脂製接着剤からなる接
着兼用防錆材48が中空PC鋼棒1の端部開口部から予
めあるいは適宜の時期に注入充填されると共に、前記P
C鋼棒12の奥側に配置される前記中空PC鋼棒1の長
さ寸法よりも短い長尺のノンプル用反力PC鋼棒13が
挿入され、次にこれに直列に係合される短寸の撤去用反
力PC鋼棒12がノンプル(据置)用反力PC鋼棒13
と直列に、かつ中空PC鋼棒1の入り口側の開口端部か
ら所定の押し込み量以上を突出するように配置した後
に、支承筒7を中空PC鋼棒1の後端部雄ねじ部3に螺
合させ、かつストッパー8を支承筒7の後部に螺合させ
る。In the case of the first embodiment, the support cylinder 7 is removed from the hollow PC steel rod 1, the concrete 20 is hardened and then hardened, and the hollow PC steel rod 1 and the non-pull reaction force PC steel rod 13 are removed. In order to enhance the integrity and improve the ultimate strength of the concrete member, the adhesive / rust preventive material 48 made of a time-curing synthetic resin adhesive obtained by appropriately mixing a retarder with the curing adhesive is a hollow PC steel rod. Injecting and filling from the end opening of No. 1 in advance or at an appropriate time, and
A long non-pull reaction force PC steel rod 13 shorter than the length dimension of the hollow PC steel rod 1 arranged on the back side of the C steel rod 12 is inserted, and then a short length is engaged in series with this. Dimension removal reaction force PC steel rod 12 is non-pull (stationary) reaction force PC steel rod 13
After being arranged in series with the hollow PC steel rod 1 so as to project from the opening end portion on the inlet side of the hollow PC steel rod 1 by a predetermined amount or more, the support cylinder 7 is screwed into the male screw portion 3 of the rear end portion of the hollow PC steel rod 1. And the stopper 8 is screwed onto the rear portion of the support cylinder 7.
【0019】この実施形態においては、長尺のノンプル
(据置)用反力PC鋼棒13と短尺撤去用反力PC鋼棒
12との長短2本のPC鋼棒により、中空PC鋼棒1内
に配置される押し込み用反力PC鋼材14が構成され、
前記ノンプル用反力PC鋼棒13の寸法と撤去用反力P
C鋼棒12の寸法の和が前記中空PC鋼棒1の寸法より
も長く構成し、前記中空PC鋼棒1の後端部外側に、前
記撤去用反力PC鋼棒12が突出するように構成されて
いる。この突出した寸法が、ジャッキ50により間接的
に押し込むことができるプレストレス量の最大値にな
る。In this embodiment, the inside of the hollow PC steel rod 1 is made up of two long and short PC steel rods, a long non-pull (stationary) reaction force PC steel rod 13 and a short length removal reaction PC steel rod 12. The reaction force PC steel material for pushing 14 arranged in
Dimensions of the non-pull reaction force PC steel rod 13 and removal reaction force P
The sum of the dimensions of the C steel rod 12 is configured to be longer than that of the hollow PC steel rod 1 so that the removal reaction force PC steel rod 12 projects to the outside of the rear end portion of the hollow PC steel rod 1. It is configured. This protruding dimension becomes the maximum value of the prestress amount that can be indirectly pushed in by the jack 50.
【0020】このように構成された多数のユニットのコ
ンクリート用プレストレス力導入装置17を搬入して、
型枠内に配設し、コンクリート20を前記プレストレス
力導入装置17を埋め込むように型枠内に打設し、中空
PC鋼棒1の外側にコンクリート製梁部材あるいはコン
クリート製スラブ部材等の躯体を構成するコンクリート
20が養生硬化した後に、電動式レンチによりストッパ
ー8が、図2の左方向に移動するように回転されて、反
力PC鋼棒の圧縮力が開放される。この時、中空PC鋼
棒1とコンクリート20との付着によって、中空PC鋼
棒1の短縮が阻まれ、これにより相対的にコンクリート
20にプレストレスが導入される。中空PC鋼棒1とコ
ンクリート20との付着が十分であれば、アンカー材1
5とアンカー部材25は、原理的には省略することもで
きる。The concrete prestressing force introducing device 17 of a large number of units thus constructed is carried in,
It is arranged in a mold and concrete 20 is placed in the mold so as to embed the prestressing force introducing device 17, and a frame such as a concrete beam member or a concrete slab member is provided outside the hollow PC steel rod 1. After the concrete 20 constituting the above is cured and hardened, the stopper 8 is rotated by the electric wrench so as to move to the left in FIG. 2, and the compressive force of the reaction force PC steel rod is released. At this time, due to the adhesion of the hollow PC steel rod 1 and the concrete 20, the shortening of the hollow PC steel rod 1 is hindered, so that the prestress is relatively introduced into the concrete 20. If the adhesion between the hollow PC steel rod 1 and the concrete 20 is sufficient, the anchor material 1
5 and the anchor member 25 can be omitted in principle.
【0021】その後前記支承筒7を取り外した後、前記
撤去用反力PC鋼棒12のみを取り外し、図2に示すよ
うに、ノンプル用反力PC鋼棒13を回収することな
く、前記中空PC鋼棒1内に据え置き、防錆を兼ねる経
時硬化製樹脂等の接着兼用防錆材48の硬化により中空
PC鋼棒1とノンプル用PC鋼棒13の一体化を図る。Then, after removing the support cylinder 7, only the removal reaction force PC steel rod 12 is removed, and as shown in FIG. 2, the hollow PC is recovered without recovering the non-pulling reaction force PC steel rod 13. The hollow PC steel rod 1 and the non-pulling PC steel rod 13 are integrated by hardening the adhesive and rust preventive material 48 such as a resin which is hardened with time and also functions as rust preventive.
【0022】押し込み用反力PC鋼棒14の圧縮力が開
放された後、前記支承筒7および短寸の撤去用反力PC
鋼棒12が抜き出されて回収した後に、前記中空PC鋼
棒1の後端部に、キャップ19の先端突部が当接するよ
うにキャップ19が嵌設されると共に、前記キャップ1
9と前記中空PC鋼棒1またはノンプル用反力PC鋼棒
13とが接着材により固着されるかまたは螺合連結され
て、中空PC鋼棒1内に据え置かられるノンプル用反力
PC鋼棒13の端部側の防錆処理が施工される。Reaction force PC for pushing After the compressive force of the steel rod 14 is released, reaction force PC for removing the support cylinder 7 and the short length
After the steel rod 12 is extracted and collected, the cap 19 is fitted to the rear end of the hollow PC steel rod 1 so that the tip projection of the cap 19 abuts, and the cap 1
9 and the hollow PC steel rod 1 or the non-pull reaction force PC steel rod 13 are fixed to each other by an adhesive material or screw-connected to each other, and the non-pull reaction force PC steel rod 13 is installed in the hollow PC steel rod 1. Rust prevention treatment is applied to the end of the.
【0023】本発明における第1実施形態では、従来の
1本もの押し込み用反力PC鋼棒40に代えて、長尺の
ノンプル用反力PC鋼棒13と、短尺の撤去用反力PC
鋼棒12とによって構成し、コンクリート部材21への
プレストレス導入が完了した後、支承筒7,押圧係止片
11および短尺の撤去用反力PC鋼棒12を抜き取りよ
うにしているので、これら支承筒7、押圧係止片11お
よび短尺の撤去用反力PC鋼棒12を再利用することが
できる。In the first embodiment of the present invention, a long reaction force PC steel rod 13 for pulling and a short reaction force PC for removal are used instead of one conventional reaction force PC steel rod 40 for pushing.
After the introduction of the prestress to the concrete member 21 is completed, the support cylinder 7, the pressing engagement piece 11 and the short reaction force for removal PC steel bar 12 are to be extracted. It is possible to reuse the support cylinder 7, the pressing engagement piece 11, and the short-length removing reaction force PC steel rod 12.
【0024】(第2実施形態)図3は本発明の第2実施
形態を示すものであって、この実施形態の場合は、従来
の1本もの反力PC鋼棒の突出部を異形押込ピースから
なる押圧係止片11で置き換えたもので、すなわち前記
第1実施形態における押圧係止片11と撤去用反力PC
鋼棒12とを一体化し、ストッパー8とノンプル用PC
鋼棒13との間に、支承筒7と共に撤去可能な挿し込み
鋼棒部分11aを有する断面倒T字状の押圧係止片11
を介在させた実施形態であるが、その他の構成および操
作施工手順については前記実施形態と同様であるので、
同様である部分については、前記実施形態と同じ符号を
付してその構造および施工手順の説明を省略する。この
場合には、ストッパー8を緩め、支承筒7と共に押圧係
止片11を取り外し、キャップ19を冠装し、切り欠き
部22にモルタル23を充填する構造になり、図2と同
じ状態になる。したがって、前記支承筒7、押圧係止片
11を再利用することができる。この場合には、押し込
み鋼棒を備えた押圧係止片11が支承筒7に組み合わさ
れているので、部品点数を少なくでき、作業効率を高め
ることができる。(Second Embodiment) FIG. 3 shows a second embodiment of the present invention. In the case of this embodiment, the projection portion of one conventional reaction force PC steel rod is deformed into a deformed pushing piece. Which is replaced by the pressure locking piece 11 made of, that is, the pressure locking piece 11 and the removal reaction force PC in the first embodiment.
Steel rod 12 is integrated, stopper 8 and non-pulling PC
A pressure locking piece 11 having an inverted T-shaped cross section, which has an insertable steel rod portion 11a which can be removed together with the support cylinder 7 between the steel rod 13 and the support rod 7.
However, since the other configurations and operation construction procedures are the same as those of the embodiment,
About the same part, the same code | symbol as the said embodiment is attached | subjected and description of the structure and construction procedure is abbreviate | omitted. In this case, the stopper 8 is loosened, the pressing locking piece 11 is removed together with the support cylinder 7, the cap 19 is capped, and the notch 22 is filled with the mortar 23, which is the same state as in FIG. . Therefore, the support cylinder 7 and the pressing locking piece 11 can be reused. In this case, since the pressing engagement piece 11 including the pushing steel bar is combined with the support cylinder 7, the number of parts can be reduced and the work efficiency can be improved.
【0025】(第3実施形態)図4は本発明のコンクリ
ート用プレストレス力導入装置17の第3実施形態を示
すものであって、前記第1実施形態、第2実施形態にお
いては、中空PC鋼棒1内において、遊嵌状態にある押
込み用反力PC鋼棒14を図5に示すように、予め押込
み用反力PC鋼棒14の両端部をねじ切り加工して、雄
ねじ部26,27を設け、先端部の雄ねじ部26をアン
カー材15における雌ねじ凹部15aの中央部に雌ねじ
孔28に螺合連結すると共に、コンクリート20が硬化
し、支承筒7を外してプレストレスを導入した後におい
て、図5に示すように、押込み用反力PC鋼棒14の後
端部の雄ねじ部27に押込み用反力PC鋼棒固定用のア
ンカーナット28を螺合して、そのアンカーナット28
の前端面を中空PC鋼棒1の後端面に加圧するように圧
着した状態で係合させることにより、押込み用反力PC
鋼棒14をアンカーナット28と反力PC鋼棒用アンカ
ー材15で固定し、コンクリート部材25にひび割れを
生じさせるような過大な荷重の作用時に、中空PC鋼棒
1と一体になって共同して抵抗するように構成したもの
である。この実施形態の場合には、過大な荷重の作用時
に、押込み用反力PC鋼棒14も中空PC鋼棒1と同時
に引張抵抗力を作用させることができるので、部材の耐
力を向上させることができる。(Third Embodiment) FIG. 4 shows a third embodiment of the prestressing force introducing device 17 for concrete of the present invention. In the first and second embodiments, a hollow PC is used. In the steel rod 1, as shown in FIG. 5, the pushing reaction force PC steel rod 14 in a loosely fitted state is preliminarily threaded at both ends of the pushing reaction force PC steel rod 14 to form the male screw portions 26, 27. Is provided, and the male screw portion 26 of the tip portion is screwed and coupled to the female screw hole 28 in the central portion of the female screw concave portion 15a of the anchor material 15, and the concrete 20 is hardened, and the support cylinder 7 is removed to introduce prestress. As shown in FIG. 5, an anchor nut 28 for fixing the pushing reaction force PC steel rod is screwed into the male screw portion 27 at the rear end of the pushing reaction force PC steel rod 14, and the anchor nut 28 is attached.
The front end face of the hollow PC steel rod 1 is engaged with the rear end face of the hollow PC steel rod in a pressure-bonded state so that the pushing reaction force PC
The steel rod 14 is fixed by the anchor nut 28 and the reaction force PC steel rod anchor member 15, and when the concrete member 25 is subjected to an excessive load such as cracking, the hollow PC steel rod 1 is integrally joined together. It is configured to resist. In the case of this embodiment, when the excessive load is applied, the pushing reaction force PC steel rod 14 can also exert the tensile resistance force at the same time as the hollow PC steel rod 1, so that the yield strength of the member can be improved. it can.
【0026】その他の構成および操作施工手順について
は、前記実施形態と同様であるので、同様である部分に
ついては、前記実施形態と同じ符号を付してその構造お
よび施工手順の説明を省略する。Since the other construction and the operation procedure are the same as those in the above-mentioned embodiment, the same parts are designated by the same reference numerals and the description of the structure and the operation procedure is omitted.
【0027】(第4実施形態)図6は、コンクリート用
プレストレス力導入装置17を配設時等において、図4
に示すコンクリート用プレストレス力導入装置17を塑
性加工により湾曲させた場合に、中空PC鋼棒1と一本
ものの押込み用反力PC鋼棒14との間の摩擦によるプ
レストレスの損失が生じる場合があり、この摩擦による
プレストレスの損失が小さくなるように工夫したもの
で、一本もののノンプル方式反力PC鋼棒の代わりにこ
れよりも細い複数本のPC鋼線35を平行に縦添えした
ノンプル方式のPC鋼線束36に置き換えて各PC鋼線
35がその長手方向に相対的に動けるようにすると共
に、さらにこのPC鋼線束36の外周面に螺旋状鉄筋3
7を巻きつけ、その両端部を適宜の固定手段によりPC
鋼線35に固定している。前記のように螺旋状鉄筋37
を巻きつけておくと、コンクリート用プレストレス力導
入装置17がその配設時において塑性加工により湾曲さ
れた場合、各PC鋼線35相互が相対的にその長手方向
に動けるので、中空PC鋼棒1の内周面との摩擦を解消
することができ、各PC鋼線35の座屈を防止しなが
ら、摩擦によるプレストレスの損失が生じる恐れを解消
することができる。また各PC鋼線35に圧縮力が付与
された際、螺旋状鉄筋37で拘束してあるので、各PC
鋼線35が座屈することはなく、圧縮力を付与させるこ
とができる。(Fourth Embodiment) FIG. 6 shows the state in which the prestressing force introducing device 17 for concrete is installed.
In the case where the prestressing force introduction device 17 for concrete shown in Fig. 1 is bent by plastic working, a prestress loss occurs due to friction between the hollow PC steel rod 1 and one pushing reaction force PC steel rod 14. In order to reduce the loss of prestress due to this friction, a plurality of thinner PC steel wires 35 are vertically installed in parallel instead of one non-pull type reaction force PC steel rod. The PC steel wire bundle 36 of the non-pull type is replaced so that each PC steel wire 35 can relatively move in the longitudinal direction thereof, and the spiral reinforcing bar 3 is further provided on the outer peripheral surface of the PC steel wire bundle 36.
Wrap 7 and PC at both ends with appropriate fixing means
It is fixed to the steel wire 35. As described above, the spiral rebar 37
If the prestressing force introduction device for concrete 17 is bent by plastic working during its installation, the respective PC steel wires 35 can move relative to each other in the longitudinal direction. The friction with the inner peripheral surface of No. 1 can be eliminated, and while preventing the buckling of each PC steel wire 35, the risk of prestress loss due to friction can be eliminated. Further, when the compressive force is applied to each PC steel wire 35, each PC steel wire 35 is constrained by the spiral reinforcing bar 37.
The steel wire 35 does not buckle and a compressive force can be applied.
【0028】その他の構成および操作施工手順について
は、前記第2実施形態と同様であるので、同様である部
分については、前記実施形態と同じ符号を付してその構
造および施工手順の説明を省略する。Since the other construction and operation procedure are the same as those in the second embodiment, the same parts are designated by the same reference numerals as those in the above embodiment and the explanation of the structure and the procedure is omitted. To do.
【0029】(第5実施形態)図7は本発明の第5実施
形態を示すものであって、この実施形態の場合は、ノン
プル方式で使用される押込み用反力PC鋼棒14を中空
PC鋼棒1よりも突出する長さにしておき、かつ前記押
込み用反力PC鋼棒14の両端部を予めねじ切り加工し
て、先端部に雄ねじ部26および後端部に雄ねじ部27
を形成し、また先端部をアンカー材15に螺合固定し、
コンクリート部材21へのプレストレス導入後、後端側
の突出した部分を利用して、中空PC鋼棒1の外径より
も大きい内径の透孔を有するアンカープレート29を中
空PC鋼棒1に嵌設すると共にコンクリート部材21に
当接させ、ワッシャー30、反力PC鋼棒定着用ナット
31を取付ける。その後、図7bに示すように、押し込
み用反力PC鋼棒14の後端部雄ねじ部27にカップラ
ー52を介して引張用螺杆53を直列に連結し、脚部5
5を有し周側面部が一部開放されている間隔保持部材5
4を前記引張用螺杆53に嵌設すると共に、脚部55を
アンカープレート29に取付け、前記引張用螺杆53に
センターホールジャッキ56を嵌設し、前記引張用螺杆
53の後端部にナット57を螺合させると共に、可動ピ
ストン58に係合させる。この状態でセンターホールジ
ャッキ56を伸長させて、引張用螺杆53を介して押し
込み用反力PC鋼棒14を図9の左方向に引張すると、
反力PC鋼棒定着用ナット31がアンカープレート29
から離れるので、前記反力PC鋼棒定着用ナット31を
アンカープレート29に接近する方向に回転させて、ア
ンカープレート29に締め付けることにより、押込み用
反力PC鋼棒14を緊張できる構造としたものである。
なお、押込み用反力PC鋼棒14を緊張した後は、セン
ターホールジャッキ56を開放して、ナット57,引張
用螺杆53,間隔保持部材54,カップラー52を撤去
し、モルタル23を切り欠き部22に充填する(図7の
状態)。前記図5の場合もこのような構造に変更するこ
とができる。(Fifth Embodiment) FIG. 7 shows a fifth embodiment of the present invention. In the case of this embodiment, the pushing reaction force PC steel rod 14 used in the non-pull method is a hollow PC. The length is set so as to project from the steel rod 1, and both ends of the pushing reaction force PC steel rod 14 are threaded in advance so that the male screw portion 26 is formed at the front end and the male screw portion 27 is formed at the rear end.
Is formed, and the tip portion is screwed and fixed to the anchor material 15,
After the prestress is introduced into the concrete member 21, the anchor plate 29 having a through hole having an inner diameter larger than the outer diameter of the hollow PC steel rod 1 is fitted to the hollow PC steel rod 1 by utilizing the protruding portion on the rear end side. Then, the washer 30 and the reaction force PC steel rod fixing nut 31 are attached. Thereafter, as shown in FIG. 7b, the pulling rod 53 is connected in series to the rear end male screw portion 27 of the pushing reaction force PC steel rod 14 via the coupler 52, and the leg portion 5 is connected.
5, the spacing member 5 having a peripheral side surface partly open
4 is fitted into the tensioning rod 53, the leg 55 is attached to the anchor plate 29, the center hole jack 56 is fitted into the tensioning rod 53, and the nut 57 is attached to the rear end of the tensioning rod 53. Is engaged with the movable piston 58. In this state, when the center hole jack 56 is extended and the pushing reaction force PC steel rod 14 is pulled to the left in FIG. 9 through the pulling rod 53,
Reaction force PC steel rod fixing nut 31 is anchor plate 29
Since it is separated from the above, the reaction force PC steel rod fixing nut 31 is rotated in a direction approaching the anchor plate 29 and tightened to the anchor plate 29, so that the pushing reaction force PC steel rod 14 can be tensioned. Is.
After tensioning the pushing reaction force PC steel rod 14, the center hole jack 56 is opened, the nut 57, the tensioning rod 53, the spacing member 54, and the coupler 52 are removed, and the mortar 23 is cut out. 22 is filled (state of FIG. 7). Also in the case of FIG. 5, the structure can be changed.
【0030】[0030]
【発明の効果】本発明は以上の構成であるので次のよう
な効果を有している。
比較的長尺の反力PC鋼棒を抜き取る手間を省き、ひ
び割れが生ずるような過大な荷重作用時には、反力PC
鋼棒が中空PC鋼棒と一体となって働くので、コンクリ
ート部材の終局耐力を増大させることができるので、工
事のトータルコストを縮減できる。
反力PC鋼棒を利用し、中空PC鋼棒によるコンクリ
ート部材へのプレストレス導入に加え、反力PC鋼棒に
よってもコンクリート部材にプレストレスを導入するこ
とができるので、従来の装置よりも中空PC鋼棒の肉厚
を薄くでき、その使用量を減らすことができ、コストを
縮減できる。
既存のプレストレス力導入装置を、押し込み用反力P
C鋼棒の切断、あるいは置き換え等の簡単な部品の変更
で、本発明の反力PC鋼棒据置式用のプレストレス力導
入装置に変更することができる。The present invention having the above-mentioned structure has the following effects. Relatively long reaction force PC It saves the labor of pulling out a steel bar, and reaction force PC can be used when an excessive load acts such as cracking.
Since the steel rod works integrally with the hollow PC steel rod, the ultimate yield strength of the concrete member can be increased, and the total cost of construction can be reduced. Using reaction force PC steel rod, in addition to introducing prestress to concrete member by hollow PC steel rod, it is possible to introduce prestress to concrete member by reaction force PC steel rod. The thickness of the PC steel bar can be reduced, the amount used can be reduced, and the cost can be reduced. Reaction force P for pushing in the existing prestress force introduction device
It is possible to change to the reaction force PC steel rod stationary prestress force introduction device of the present invention by simply changing the parts such as cutting or replacing the C steel rod.
【図1】本発明の第1実施形態に係るコンクリート用プ
レストレス導入装置を示すものであって、(a)は一部
切欠側面図であり、(b)は一部切欠縦断側面図であ
る。1A and 1B show a prestressing device for concrete according to a first embodiment of the present invention, in which FIG. 1A is a partially cutaway side view and FIG. 1B is a partially cut out vertical side view. .
【図2】本発明の第1実施形態に係るコンクリート用プ
レストレス導入装置を用いてコンクリート部材にプレス
トレスを導入した後の状態を示す一部切欠縦断側面図で
ある。FIG. 2 is a partially cutaway vertical side view showing a state after introducing prestress to a concrete member using the prestressing device for concrete according to the first embodiment of the present invention.
【図3】本発明の第2実施形態に係るコンクリート用プ
レストレス導入装置を示すものであって、(a)は一部
切欠側面図であり、(b)は一部切欠縦断側面図であ
る。3A and 3B show a prestressing introduction apparatus for concrete according to a second embodiment of the present invention, wherein FIG. 3A is a partially cutaway side view, and FIG. 3B is a partially cut out vertical side view. .
【図4】本発明の第3実施形態に係るコンクリート用プ
レストレス導入装置を示すものであって、(a)は一部
切欠側面図であり、(b)は一部切欠縦断側面図であ
る。4A and 4B show a prestressing introduction apparatus for concrete according to a third embodiment of the present invention, wherein FIG. 4A is a partially cutaway side view and FIG. 4B is a partially cut out vertical side view. .
【図5】本発明の第3実施形態に係るコンクリート用プ
レストレス導入装置を用いてコンクリート部材にプレス
トレスを導入した後の状態を示す一部切欠縦断側面図で
ある。FIG. 5 is a partially cutaway vertical side view showing a state after introducing prestress to a concrete member using the prestressing apparatus for concrete according to the third embodiment of the present invention.
【図6】本発明の第4実施形態に係るコンクリート用プ
レストレス導入装置を示すものであって、(a)は一部
切欠側面図であり、(b)は一部切欠縦断側面図であ
り、(c)は(b)のA―A線断面図である。FIG. 6 shows a prestressing device for concrete according to a fourth embodiment of the present invention, (a) is a partially cutaway side view, and (b) is a partially cutout vertical side view. , (C) are sectional views taken along the line AA of (b).
【図7】(a)は本発明の第5実施形態に係るコンクリ
ート用プレストレス導入装置を用いてコンクリート部材
にプレストレスを導入した後の状態を示す一部切欠縦断
側面図であり、(b)は反力PC鋼棒に緊張力を導入す
る場合の説明図である。FIG. 7 (a) is a partially cutaway vertical side view showing a state after introducing prestress to a concrete member using the prestressing device for concrete according to the fifth embodiment of the present invention; ) Is an explanatory view in the case of introducing a tension force into the reaction force PC steel rod.
【図8】従来のプレストレス導入装置を示す一部切欠縦
断側面図である。FIG. 8 is a partially cutaway vertical side view showing a conventional prestress introduction device.
【図9】従来のコンクリート用プレストレス導入装置を
用いてコンクリート部材にプレストレスを導入した後の
状態を示す一部切欠縦断側面図である。FIG. 9 is a partially cutaway vertical sectional side view showing a state after introducing prestress to a concrete member using a conventional prestress introducing device for concrete.
1 中空PC鋼棒 1a 鋼製中空PC鋼棒本体 2 雄ねじ部 3 雄ねじ部 4 雌ねじ孔 5 雌ねじ孔 6 回動工具係合用外面 7 支承筒 8 ストッパー(環状係止片) 9 回動工具係合用外面 10 凹部 11 押圧係止片 12 撤去用反力PC鋼棒 13 ノンプル用反力PC鋼棒 14 押し込み用反力PC鋼棒または鋼材 15 アンカー材 16 押し込み鋼棒 17 プレストレス力導入装置 18 防錆材 19 キャップ 20 コンクリート 21 コンクリート部材 22 切り欠き部 23 モルタル 24 異形押し込み部材 25 アンカー部材 26 雄ねじ部 27 雄ねじ部 28 アンカーナット 29 アンカープレート 30 ワッチャー 31 鋼棒定着用ナット 32 反力PC鋼棒定着用筒状リング 33 雌ねじ孔 35 PC鋼線 36 PC鋼線束 37 螺旋状鉄筋 40 反力PC鋼棒 41 キャップ 42 枠形フレーム 43 前部フレーム 44 後部フレーム 45 連結ロッド 46 アダプター 47 押圧ロッド 48 防錆剤 49 2分割型受け片 50 液圧ジャッキ 51 可動ピストン 1 Hollow PC steel rod 1a Steel hollow PC steel rod body 2 Male thread 3 Male thread 4 female screw holes 5 female screw holes 6 External surface for turning tool engagement 7 support cylinder 8 stopper (annular locking piece) 9 Outer surface for turning tool engagement 10 recess 11 Press locking piece 12 Reaction force PC steel rod for removal 13 Non-pull reaction force PC steel rod 14 Reaction force PC steel rod or steel for pushing 15 anchor material 16 Indented steel rod 17 Prestressing force introduction device 18 Anticorrosion material 19 cap 20 concrete 21 Concrete member 22 Notch 23 Mortar 24 Deformed member 25 anchor members 26 Male thread 27 Male thread 28 Anchor nut 29 anchor plate 30 watchers 31 Steel rod fixing nut 32 Reaction force PC steel rod fixing tubular ring 33 Female screw hole 35 PC steel wire 36 PC steel wire bundle 37 spiral rebar 40 Reaction force PC steel rod 41 cap 42 frame 43 front frame 44 rear frame 45 connecting rod 46 Adapter 47 Push rod 48 Antirust agent 49 2 split type receiving piece 50 hydraulic jack 51 movable piston
フロントページの続き (72)発明者 今井 昌文 栃木県真岡市鬼怒ケ丘5 オリエンタル 建設株式会社 技術研究所内 (72)発明者 溝口 茂 神奈川県平塚市田村5893 高周波熱錬株 式会社 平塚工場内 (56)参考文献 特開 平11−144130(JP,A) 特開 平9−221915(JP,A) (58)調査した分野(Int.Cl.7,DB名) E04C 5/08 E04G 21/12 104 Front Page Continuation (72) Inventor Masafumi Imai 5 Kinugaoka, Moka-shi, Tochigi Oriental Engineering Co., Ltd. Technical Research Institute (72) Inventor Shigeru Mizoguchi 5893 Tamura, Hiratsuka-shi, Kanagawa High-frequency smelting company Hiratsuka Factory (56) ) Reference JP-A-11-144130 (JP, A) JP-A-9-221915 (JP, A) (58) Fields investigated (Int.Cl. 7 , DB name) E04C 5/08 E04G 21/12 104
Claims (7)
C鋼棒1の前記雄ねじ部3に、前後両端部に雌ねじ孔
4,5を有すると共に多角形の回動工具係合用外面6を
有する支承筒7における前端部の雌ねじ孔4が螺合連結
され、その支承筒7の後端部の雌ねじ孔5にストッパー
8が螺合され、前記ストッパー8の前端部に前記支承筒
7内に配置された押圧係止片11の後部が係合され、前
記中空PC鋼棒1に挿入配置され押圧された状態の押込
み用反力PC鋼棒14の後端部が前記押圧係止片11の
前部に係合され、前記押込み用反力PC鋼棒14の前端
部が前記中空PC鋼棒1の前端部に固定されたアンカー
材15に当接または螺合され、前記中空PC鋼棒の中間
部外側にアンカー部材25を備えたコンクリート用プレ
ストレス力導入装置において、前記押込み用反力PC鋼
棒14が、前記中空PC鋼棒1内に挿入配置された前部
側のノンプル用反力PC鋼棒13と、前記中空PC鋼棒
1内に配置されると共にその後端部から突出するように
配置され、かつ前記ノンプル用反力PC鋼棒13と独立
した後部側の撤去用反力PC鋼棒12とにより構成され
ていることを特徴とするノンプル方式反力PC鋼材によ
るプレストレス力導入装置。1. A hollow P having a male screw portion 3 on the outside of a rear end portion.
The male screw portion 3 of the C steel rod 1 is screw-connected to the female screw hole 4 at the front end of the support cylinder 7 having female screw holes 4 and 5 at both front and rear ends and having a polygonal rotary tool engaging outer surface 6. The stopper 8 is screwed into the female screw hole 5 at the rear end of the support cylinder 7, and the rear end of the pressing engagement piece 11 arranged in the support cylinder 7 is engaged with the front end of the stopper 8, The rear end portion of the pushing reaction force PC steel rod 14 inserted into the hollow PC steel rod 1 and pressed is engaged with the front portion of the pushing engagement piece 11, and the pushing reaction force PC steel rod 14 is pressed. Of the hollow PC steel rod 1 is abutted or screwed to the anchor material 15 fixed to the front end of the hollow PC steel rod 1, and an anchor member 25 is provided outside the middle portion of the hollow PC steel rod to introduce prestressing force for concrete. In the device, the pushing reaction force PC steel rod 14 is the hollow The front side non-pull reaction force PC steel rod 13 inserted into the C steel rod 1 and the hollow PC steel rod 1 are arranged so as to project from the rear end thereof and A prestress force introduction device using a non-pull type reaction force PC steel material, characterized in that it is constituted by a reaction force reaction PC steel rod 13 and a rear side reaction force PC steel rod 12 for removal.
C鋼棒1の前記雄ねじ部3に、前後両端部に雌ねじ孔
4,5を有すると共に多角形の回動工具係合用外面6を
有する支承筒7における前端部の雌ねじ孔4が螺合連結
され、その支承筒7の後端部の雌ねじ孔5にストッパー
8が螺合され、前記ストッパー8の前端部に前記支承筒
7内に配置された押圧係止片11の後部が係合され、前
記中空PC鋼棒1に挿入配置され押圧された状態の押込
み用反力PC鋼棒14の後端部が前記押圧係止片11の
前部に係合され、前記押込み用反力PC鋼棒14の前端
部が前記中空PC鋼棒1の前端部に固定されたアンカー
材15に当接または螺合され、前記中空PC鋼棒の中間
部外側にアンカー部材25を備えたコンクリート用プレ
ストレス力導入装置において、前記押込み用反力PC鋼
棒14が、前記中空PC鋼棒1よりも短尺のノンプル用
反力PC鋼棒とされ、かつ前記押圧係止片11が前記中
空PC鋼棒1内に配置されると共にその後端部から突出
するように配置された前部側の棒状部分と前記ストッパ
ー8に係合する後部側の版状部分とにより構成されてい
ることを特徴とするノンプル方式反力PC鋼材によるプ
レストレス力導入装置。2. A hollow P having a male screw portion 3 on the outside of the rear end portion.
The male screw portion 3 of the C steel rod 1 is screw-connected to the female screw hole 4 at the front end of the support cylinder 7 having female screw holes 4 and 5 at both front and rear ends and having a polygonal rotary tool engaging outer surface 6. The stopper 8 is screwed into the female screw hole 5 at the rear end of the support cylinder 7, and the rear end of the pressing engagement piece 11 arranged in the support cylinder 7 is engaged with the front end of the stopper 8, The rear end portion of the pushing reaction force PC steel rod 14 inserted into the hollow PC steel rod 1 and pressed is engaged with the front portion of the pushing engagement piece 11, and the pushing reaction force PC steel rod 14 is pressed. Of the hollow PC steel rod 1 is abutted or screwed to the anchor material 15 fixed to the front end of the hollow PC steel rod 1, and an anchor member 25 is provided outside the middle portion of the hollow PC steel rod to introduce prestressing force for concrete. In the device, the pushing reaction force PC steel rod 14 is the hollow The front is a non-pulling reaction force PC steel rod shorter than the C steel rod 1, and the pressing locking piece 11 is arranged in the hollow PC steel rod 1 and is arranged so as to project from the rear end thereof. A prestress force introduction device using a non-pull type reaction force PC steel material, characterized in that it is configured by a rod-shaped portion on the side and a plate-shaped portion on the rear side that engages with the stopper 8.
C鋼棒1の前記雄ねじ部3に、前後両端部に雌ねじ孔
4,5を有すると共に多角形の回動工具係合用外面6を
有する支承筒7における前端部の雌ねじ孔4が螺合連結
され、その支承筒7の後端部の雌ねじ孔5にストッパー
8が螺合され、前記ストッパー8の前端部に前記支承筒
7内に配置された押圧係止片11の後部が係合され、前
記中空PC鋼棒1に挿入配置され押圧された状態の押込
み用反力PC鋼棒14の後端部が前記押圧係止片11の
前部に係合され、前記押込み用反力PC鋼棒14の前端
部が前記中空PC鋼棒1の前端部に固定されたアンカー
材15に螺合され、前記中空PC鋼棒の中間部外側にア
ンカー部材25を備えたコンクリート用プレストレス力
導入装置において、前記押込み用反力PC鋼棒14の前
端部が前記アンカー材に螺合固定されると共に後端部が
前記中空PC鋼棒1の後端部から突出するように配置さ
れ、前記押込み用反力PC鋼棒14の後端部に、前記押
込み用反力PC鋼棒固定用のナット螺合用雄ねじ部が形
成されて、前記押込み用反力PC鋼棒14がノンプル用
反力PC鋼棒とされていることを特徴とするノンプル方
式反力PC鋼材によるプレストレス力導入装置。3. A hollow P having a male screw portion 3 on the outer side of the rear end portion.
The male screw portion 3 of the C steel rod 1 is screw-connected to the female screw hole 4 at the front end of the support cylinder 7 having female screw holes 4 and 5 at both front and rear ends and having a polygonal rotary tool engaging outer surface 6. The stopper 8 is screwed into the female screw hole 5 at the rear end of the support cylinder 7, and the rear end of the pressing engagement piece 11 arranged in the support cylinder 7 is engaged with the front end of the stopper 8, The rear end portion of the pushing reaction force PC steel rod 14 inserted into the hollow PC steel rod 1 and pressed is engaged with the front portion of the pushing engagement piece 11, and the pushing reaction force PC steel rod 14 is pressed. In the prestressing force introduction device for concrete, the front end portion of which is screwed into the anchor material 15 fixed to the front end portion of the hollow PC steel rod 1, and the anchor member 25 is provided outside the middle portion of the hollow PC steel rod. The front end of the pushing reaction force PC steel rod 14 is the anchor. The hollow PC steel rod 1 is arranged so that its rear end projects from the rear end of the hollow PC steel rod 1, and the pushing reaction force PC is attached to the rear end portion of the pushing reaction PC steel rod 14. Prestressing by a non-pull reaction force PC steel material, characterized in that a male screw portion for nut screwing for fixing a steel rod is formed, and the pushing reaction force PC steel rod 14 is a non-pull reaction force PC steel rod. Force introduction device.
C鋼棒1の前記雄ねじ部3に、前後両端部に雌ねじ孔
4,5を有すると共に多角形の回動工具係合用外面6を
有する支承筒7における前端部の雌ねじ孔4が螺合連結
され、その支承筒7の後端部の雌ねじ孔5にストッパー
8が螺合され、前記ストッパー8の前端部に前記支承筒
7内に配置された押圧係止片11の後部が係合され、前
記中空PC鋼棒1に挿入配置され押圧された状態の押込
み用PC鋼材14の後端部が前記押圧係止片11の前部
に係合され、前記押込み用PC鋼材14の前端部が前記
中空PC鋼棒1の前端部に固定されたアンカー材15に
当接され、前記中空PC鋼棒の中間部外側にアンカー部
材25を備えたコンクリート用プレストレス力導入装置
において、前記押込み用PC鋼材14が、前記中空PC
鋼棒1よりも短尺の複数のPC鋼線とその外周面に螺旋
状に配設された螺旋状鉄筋とにより構成されたノンプル
用反力PC鋼材とされ、かつ前記押圧係止片11が、ノ
ンプル用反力PC鋼材に係合し前記中空PC鋼棒1内に
配置されると共にその後端部から突出するように配置さ
れた前部側の棒状部分と前記ストッパー8に係合する後
部側の版状部分とにより構成されていることを特徴とす
るノンプル方式反力PC鋼材によるプレストレス力導入
装置。4. A hollow P having a male screw portion 3 on the outside of the rear end portion.
The male screw portion 3 of the C steel rod 1 is screw-connected to the female screw hole 4 at the front end of the support cylinder 7 having female screw holes 4 and 5 at both front and rear ends and having a polygonal rotary tool engaging outer surface 6. The stopper 8 is screwed into the female screw hole 5 at the rear end of the support cylinder 7, and the rear end of the pressing engagement piece 11 arranged in the support cylinder 7 is engaged with the front end of the stopper 8, The rear end portion of the pushing PC steel material 14 inserted and arranged in the hollow PC steel rod 1 is engaged with the front portion of the pressing locking piece 11, and the front end portion of the pushing PC steel material 14 is hollow. For the anchor material 15 fixed to the front end of the PC steel rod 1.
In the prestressing force introduction device for concrete which is abutted and has an anchor member 25 on the outer side of the intermediate portion of the hollow PC steel rod, the pushing PC steel material 14 is the hollow PC steel rod.
A non-pull reaction force PC steel material composed of a plurality of PC steel wires shorter than the steel rod 1 and spiral reinforcing bars spirally arranged on the outer peripheral surface thereof, and the pressing engagement piece 11 is The rod-shaped portion on the front side, which is engaged with the non-pulling reaction force PC steel material and is arranged in the hollow PC steel rod 1 and is arranged so as to project from the rear end portion thereof, and the rear side portion which is engaged with the stopper 8. A prestress force introduction device using a non-pull type reaction force PC steel material characterized by being constituted by a plate portion.
れるノンプル用反力PC鋼棒等のノンプル用反力PC鋼
材との間隙に経時硬化性樹脂が充填されていることを特
徴とする請求項1、2、3、4の何れかに記載のノンプ
ル方式反力PC鋼材によるプレストレス力導入装置。5. A time-curable resin is filled in a gap between the hollow PC steel rod 1 and a non-pull reaction force PC steel material such as a non-pull reaction force PC steel rod arranged inside the hollow PC steel rod 1. The prestress force introduction device by the non-pull type reaction force PC steel material according to any one of claims 1, 2, 3, and 4.
C鋼棒1の前記雄ねじ部3に、前後両端部に雌ねじ孔
4,5を有すると共に多角形の回動工具係合用外面6を
有する支承筒7における前端部の雌ねじ孔4が螺合連結
され、その支承筒7の後端部の雌ねじ孔5にストッパー
8が螺合され、前記ストッパー8の前端部に前記支承筒
7内に配置された押圧係止片11の後部が係合され、前
記中空PC鋼棒1に挿入配置され押圧された状態の押込
み用反力PC鋼棒14の後端部が前記押圧係止片11の
前部に係合され、前記押込み用反力PC鋼棒14の前端
部が前記中空PC鋼棒1の前端部に固定されたアンカー
材15に当接または螺合され、前記中空PC鋼棒の中間
部外側にアンカー部材25を備えており、前記押込み用
反力PC鋼棒14が、前記中空PC鋼棒1内に挿入配置
された前部側のノンプル用反力PC鋼棒13と、前記中
空PC鋼棒1内に配置されると共にその後端部から突出
するように配置された後部側の撤去用反力PC鋼棒12
とにより構成されたノンプル方式反力PC鋼材によるプ
レストレス力導入装置における前記アンカー材15およ
びアンカー部材25をコンクリート中に埋め込むと共に
前記支承筒7をコンクリート部材の凹部において露出す
るように前記中空PC鋼棒1の周りにコンクリート20
を打設し、前記コンクリート20の養生を終了した後、
前記支承筒7および撤去用反力PC鋼棒を撤去してコン
クリートにプレストレスを導入した後、前記ノンプル用
反力PC鋼棒に係合するようにキャップを中空PC鋼棒
1に装着し、前記キャップを埋め込むように前記凹部に
モルタルを充填することを特徴とするノンプル方式反力
PC鋼材によるプレストレス力導入装置を使用したコン
クリート部材のプレストレス導入方法。6. A hollow P having a male screw portion 3 on the outer side of the rear end portion.
The male screw portion 3 of the C steel rod 1 is screw-connected to the female screw hole 4 at the front end of the support cylinder 7 having female screw holes 4 and 5 at both front and rear ends and having a polygonal rotary tool engaging outer surface 6. The stopper 8 is screwed into the female screw hole 5 at the rear end of the support cylinder 7, and the rear end of the pressing engagement piece 11 arranged in the support cylinder 7 is engaged with the front end of the stopper 8, The rear end portion of the pushing reaction force PC steel rod 14 inserted into the hollow PC steel rod 1 and pressed is engaged with the front portion of the pushing engagement piece 11, and the pushing reaction force PC steel rod 14 is pressed. Of the hollow PC steel rod 1 is abutted or screwed to the anchor material 15 fixed to the front end of the hollow PC steel rod 1, and an anchor member 25 is provided outside the middle portion of the hollow PC steel rod. The force PC steel rod 14 is inserted into the hollow PC steel rod 1 and arranged on the front side. And Le reaction force PC steel bar 13, the hollow PC steel rod 1 reaction force PC steel removal of arranged rear side so as to protrude from the rear end thereof while being placed within the rod 12
The hollow PC steel so that the anchor material 15 and the anchor member 25 in the prestress force introduction device using the non-pull type reaction force PC steel material configured by are embedded in concrete and the supporting cylinder 7 is exposed in the concave portion of the concrete member. Concrete 20 around the rod 1
After finishing the curing of the concrete 20,
After removing the support cylinder 7 and the removal reaction force PC steel rod and introducing prestress to the concrete, a cap is attached to the hollow PC steel rod 1 so as to engage with the non-pull reaction force PC steel rod, A prestressing method for a concrete member using a prestressing force introducing device using a non-pull type reaction force PC steel material, characterized in that the recess is filled with mortar so as to embed the cap.
C鋼棒1の前記雄ねじ部3に、前後両端部に雌ねじ孔
4,5を有すると共に多角形の回動工具係合用外面6を
有する支承筒7における前端部の雌ねじ孔4が螺合連結
され、その支承筒7の後端部の雌ねじ孔5にストッパー
8が螺合され、前記ストッパー8の前端部に前記支承筒
7内に配置された押圧係止片11の後部が係合され、前
記中空PC鋼棒1に挿入配置され押圧された状態のノン
プル用PC鋼棒14の後端部が前記押圧係止片11の前
部に係合され、前記押込み用反力PC鋼棒14の前端部
が前記中空PC鋼棒1の前端部に固定されたアンカー材
15に螺合され、前記中空PC鋼棒の中間部外側にアン
カー部材25を備えており、前記中空PC鋼棒1の後端
部から突出する前記押込み用反力PC鋼棒14の後端部
に雄ねじ部27が設けられてノンプル方式反力PC鋼材
用プレストレス力導入装置が構成され、その装置におけ
る前記アンカー材15およびアンカー部材25をコンク
リート中に埋め込むように前記中空PC鋼棒1の周りに
コンクリート20を打設し、前記コンクリート20の養
生を終了した後、前記支承筒7を撤去してコンクリート
にプレストレスを導入し、その後前記中空PC鋼棒1に
支圧プレートおよび座金を嵌設し、前記ノンプル用反力
PC鋼棒14の後端部の雄ねじ部27に螺合すると共
に、前記中空PC鋼棒1の後端部に係合した反力PC鋼
棒定着用ナットにより、前記ノンプル用反力PC鋼棒を
緊張した状態で定着することを特徴とするノンプル方式
反力PC鋼材によるプレストレス力導入装置を使用した
コンクリート部材のプレストレス導入方法。7. A hollow P having a male screw portion 3 on the outside of the rear end portion.
The male screw portion 3 of the C steel rod 1 is screw-connected to the female screw hole 4 at the front end of the support cylinder 7 having female screw holes 4 and 5 at both front and rear ends and having a polygonal rotary tool engaging outer surface 6. The stopper 8 is screwed into the female screw hole 5 at the rear end of the support cylinder 7, and the rear end of the pressing engagement piece 11 arranged in the support cylinder 7 is engaged with the front end of the stopper 8, The rear end portion of the non-pull PC steel rod 14 inserted and arranged in the hollow PC steel rod 1 is engaged with the front portion of the pressing engagement piece 11, and the front end of the pushing reaction force PC steel rod 14 is engaged. The portion is screwed to the anchor material 15 fixed to the front end portion of the hollow PC steel rod 1, and the anchor member 25 is provided outside the intermediate portion of the hollow PC steel rod, and the rear end of the hollow PC steel rod 1 is provided. A male screw portion 27 is provided at the rear end portion of the pushing reaction force PC steel rod 14 protruding from the portion. A pre-stress force introduction device for a non-pull type reaction force PC steel material is configured by pouring concrete 20 around the hollow PC steel rod 1 so as to embed the anchor material 15 and the anchor member 25 in the equipment. Then, after the curing of the concrete 20 is completed, the support cylinder 7 is removed to introduce prestress into the concrete, and then a bearing plate and a washer are fitted on the hollow PC steel rod 1 to remove the non-pull reaction. The reaction force PC steel rod fixing nut engaged with the male screw portion 27 at the rear end portion of the force PC steel rod 14 and engaged with the rear end portion of the hollow PC steel rod 1 causes the reaction force PC steel for non-pull Prestressing method for concrete member using prestressing force introducing device with non-pull type reaction force PC steel characterized by fixing the rod in a tensioned state .
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2000020162A JP3372522B2 (en) | 2000-01-28 | 2000-01-28 | Non-pull type reaction force PC steel prestress force introduction device and prestress introduction method of concrete member using the device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2000020162A JP3372522B2 (en) | 2000-01-28 | 2000-01-28 | Non-pull type reaction force PC steel prestress force introduction device and prestress introduction method of concrete member using the device |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2001207590A JP2001207590A (en) | 2001-08-03 |
JP3372522B2 true JP3372522B2 (en) | 2003-02-04 |
Family
ID=18546772
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Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2000020162A Expired - Lifetime JP3372522B2 (en) | 2000-01-28 | 2000-01-28 | Non-pull type reaction force PC steel prestress force introduction device and prestress introduction method of concrete member using the device |
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JP (1) | JP3372522B2 (en) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005098165A1 (en) * | 2004-04-08 | 2005-10-20 | Hong Kong Fiberglass Technology Limited | Instrumented bars and system |
KR100681070B1 (en) | 2004-07-09 | 2007-02-08 | 현대자동차주식회사 | Wiper device for automobile |
JP5551527B2 (en) * | 2010-06-30 | 2014-07-16 | 高周波熱錬株式会社 | Prestressed concrete structure and construction method thereof |
CN102587582B (en) * | 2012-03-09 | 2014-12-17 | 杭州图强工程材料有限公司 | Pre-stress tensioning clamp of hollow self-balance pre-stress steel bar |
JP6373666B2 (en) * | 2014-07-09 | 2018-08-15 | 前田建設工業株式会社 | Method for designing through hole of steel frame, and steel frame including through hole |
JP6571345B2 (en) * | 2015-02-20 | 2019-09-04 | 株式会社近畿開発 | Prestressing method for concrete structures |
JP6408397B2 (en) * | 2015-02-20 | 2018-10-17 | 株式会社近畿開発 | PC steel bar unit tightening force measuring device |
KR102399474B1 (en) * | 2020-10-29 | 2022-05-18 | 주식회사 한국방재안전기술 | Prestress introduction method of self-prestressing reinforcing member |
CN113187245B (en) * | 2021-04-29 | 2022-07-15 | 中建桥梁有限公司 | Clamping piece shifting device for prestress releasing construction and shifting method thereof |
-
2000
- 2000-01-28 JP JP2000020162A patent/JP3372522B2/en not_active Expired - Lifetime
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