JP2534195B2 - Fixing device for hollow PC steel rod with prestress - Google Patents
Fixing device for hollow PC steel rod with prestressInfo
- Publication number
- JP2534195B2 JP2534195B2 JP5308539A JP30853993A JP2534195B2 JP 2534195 B2 JP2534195 B2 JP 2534195B2 JP 5308539 A JP5308539 A JP 5308539A JP 30853993 A JP30853993 A JP 30853993A JP 2534195 B2 JP2534195 B2 JP 2534195B2
- Authority
- JP
- Japan
- Prior art keywords
- steel rod
- hollow
- locking piece
- rod
- steel
- 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
Landscapes
- Reinforcement Elements For Buildings (AREA)
Description
【発明の詳細な説明】Detailed Description of the Invention
【０００１】[0001]
【産業上の利用分野】本発明は、コンクリート部材にプ
レテンション方式によりプレストレスを与える場合に使
用するプレストレスを導入された中空ＰＣ鋼棒の定着装
置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fixing device for a hollow PC steel rod into which a prestress is introduced, which is used when prestressing a concrete member by a pretensioning method.
【０００２】[0002]
【従来の技術】強固なアバットを使用することなく、プ
レテンション方式によりコンクリート部材にプレストレ
スを導入する方式の一つとして、コンクリート打設現場
において、特願平４−１５２９８８号に示されているよ
うに、中空ＰＣ鋼棒の中に従来のＰＣ鋼棒（充実ＰＣ鋼
棒）を挿通し、このＰＣ鋼棒を反力支承部材として利用
して、ジャッキにより前記中空ＰＣ鋼棒に引張力を与
え、その引張力を与えた中空ＰＣ鋼棒を、コンクリート
部材の所定の位置に配置した後、コンクリートを打設
し、そのコンクリートが所定の強度に発現した後、前記
中空ＰＣ鋼棒を開放してコンクリートにプレストレスを
導入する方式が知られている。2. Description of the Related Art As one of the methods of introducing prestress to a concrete member by a pretensioning method without using a strong abutment, it is disclosed in Japanese Patent Application No. 4-152988 at a concrete pouring site. As described above, a conventional PC steel rod (solid PC steel rod) is inserted into the hollow PC steel rod, and this PC steel rod is used as a reaction force bearing member, and a tensile force is applied to the hollow PC steel rod by a jack. The hollow PC steel rod to which the tensile force is applied is placed at a predetermined position of the concrete member, concrete is poured, and the concrete develops to a predetermined strength, and then the hollow PC steel rod is opened. A method of introducing prestress into concrete is known.
【０００３】[0003]
【発明が解決しようとする課題】前記従来のプレストレ
ス導入方式の場合は、コンクリート打設現場において、
中空ＰＣ鋼棒内に挿入されたＰＣ鋼棒を反力支承部材と
して利用して、中空ＰＣ鋼棒に引張力を与えてプレスト
レスを導入する必要があるので、コンクリート打設現場
における施工能率が上がらず、かつ配等の作業も行なえ
ないので、構築施工能率がさらに低下するという欠点が
ある。したがって、中空ＰＣ鋼棒に対し専用の場所でプ
レストレスを導入したのち、そのプレストレスを導入し
た中空ＰＣ鋼棒をコンクリート打設現場まで運搬する必
要がある。In the case of the above-mentioned conventional prestress introduction method, at the concrete pouring site,
The PC steel rod inserted in the hollow PC steel rod is used as a reaction force bearing member to apply a tensile force to the hollow PC steel rod to introduce prestress, so that the construction efficiency at the concrete pouring site is improved. There is a drawback in that the construction work efficiency is further reduced because the work cannot be done and the work such as distribution cannot be performed. Therefore, it is necessary to introduce prestress to the hollow PC steel rod at a dedicated place and then transport the prestressed hollow PC steel rod to the concrete pouring site.
【０００４】前記の問題を有利に解決するために、本発
明のプレストレスを導入された中空ＰＣ鋼棒の定着装置
は中空ＰＣ鋼棒１の一端部に、その中空鋼棒１内に挿入
されたＰＣ鋼棒２の一端部を係合するストッパ３を固定
し、前記中空ＰＣ鋼棒１の他端部の外周に設けた雄ねじ
４に、支承筒５の一端部に設けた雌ねじ６を螺合し、前
記支承筒５の他端部に設けた雌ねじ７に、環状係止片８
の雄ねじ９を螺合し、前記支承筒５内において、ＰＣ鋼
棒２の端部に当接した押圧係止片１０を前記環状係止片
８と係合可能に設け、かつ中空ＰＣ鋼棒１に係止した支
圧板２２に反力をとった押圧部材３９の先端押圧杆４０
を、前記環状係止片８の挿通孔１７に挿通して杆先端で
前記押圧係止片１０を押圧したうえ、支承筒５を推進回
転可能に構成したことを特徴とする。In order to advantageously solve the above problems, the prestressed fixing device for a hollow PC steel rod of the present invention is inserted into one end of the hollow PC steel rod 1 and into the hollow steel rod 1. The stopper 3 for engaging one end of the PC steel rod 2 is fixed, and the female screw 6 provided at one end of the support cylinder 5 is screwed into the male screw 4 provided at the outer periphery of the other end of the hollow PC steel rod 1. And the annular locking piece 8 is attached to the female screw 7 provided at the other end of the support cylinder 5.
Male screw 9 is screwed into the support cylinder 5, and a pressing locking piece 10 abutting against the end of the PC steel rod 2 is provided in the supporting cylinder 5 so as to be engageable with the annular locking piece 8 and a hollow PC steel rod. 1. The tip pressing rod 40 of the pressing member 39 that has a reaction force to the bearing plate 22 locked to
Is inserted into the insertion hole 17 of the annular locking piece 8 to press the pressing locking piece 10 with the rod end, and the supporting cylinder 5 can be propelled and rotated.
【０００５】[0005]
【実施例】次に本発明を図示の例によって詳細に説明す
る。図１ないし図４は本発明の実施例に係るプレストレ
スを導入された中空ＰＣ鋼棒の定着装置を示し、図５は
中空ＰＣ鋼棒１を示し、図６はＰＣ鋼棒２を示してい
る。また図７および図８は支承筒５を示し、図９および
図１０は押圧係止片１０を示し、かつ図１１および図１
２は環状係止片８を示している。The present invention will now be described in detail with reference to the examples shown in the drawings. 1 to 4 show a fixing device for a prestressed hollow PC steel rod according to an embodiment of the present invention, FIG. 5 shows a hollow PC steel rod 1 and FIG. 6 shows a PC steel rod 2. There is. 7 and 8 show the support cylinder 5, FIGS. 9 and 10 show the pressure locking piece 10, and FIGS.
Reference numeral 2 denotes an annular locking piece 8.
【０００６】図５は本発明の実施例において用いられる
中空ＰＣ鋼棒１を示すものであって、断面円形の鋼管か
らなる中空ＰＣ鋼棒１の一端部の外周に雄ねじ１１が設
けられ、かつ前記中空ＰＣ鋼棒１の他端部の外周に雄ね
じ４が設けられている。FIG. 5 shows a hollow PC steel rod 1 used in the embodiment of the present invention. A male screw 11 is provided on the outer periphery of one end of the hollow PC steel rod 1 made of a steel pipe having a circular cross section, and A male screw 4 is provided on the outer periphery of the other end of the hollow PC steel rod 1.
【０００７】図６は本発明の実施例において用いられる
ＰＣ鋼棒２を示すものであって、丸鋼棒からなるＰＣ鋼
棒２の一端部の中心に雌ねじ孔１２が設けられている。FIG. 6 shows a PC steel rod 2 used in an embodiment of the present invention. A female screw hole 12 is provided at the center of one end of the PC steel rod 2 made of a round steel rod.
【０００８】図７および図８は支承筒５を示すものであ
って、６角形の外面１３と円形の中心孔１４とを備えて
いる鋼製筒体の一端部に、小径の雌ねじ６が設けられ、
かつ前記他端部に大径の雌ねじ７が設けられている。FIGS. 7 and 8 show the support cylinder 5, in which a small diameter female screw 6 is provided at one end of a steel cylinder having a hexagonal outer surface 13 and a circular center hole 14. The
Moreover, a large-diameter female screw 7 is provided at the other end.
【０００９】図９および図１０は押圧係止片１０を示す
ものであって、円筒状の外面を有する鋼材の前部に、Ｐ
Ｃ鋼棒挿込孔１５が設けられ、かつ前記鋼材の後部に凹
部１６が設けられている。図１１および図１２は環状係
止片８を示すものであって、円形の挿通孔１７を有する
環状係止片８の外周に雄ねじ９が設けられている。FIG. 9 and FIG. 10 show a pressing locking piece 10, in which P is provided on the front part of a steel material having a cylindrical outer surface.
A C steel rod insertion hole 15 is provided, and a recess 16 is provided at the rear portion of the steel material. 11 and 12 show the annular locking piece 8, in which a male screw 9 is provided on the outer circumference of the annular locking piece 8 having a circular insertion hole 17.
【００１０】図１ないし図４は、本発明を実施して、Ｐ
Ｃ鋼棒２を反力支承部材として利用して、中空ＰＣ鋼棒
１に引張りプレストレスを与えた状態を示すものであっ
て、中空ＰＣ鋼棒１の一端部の雄ねじ１１に、ナット１
８が螺合され、前記中空ＰＣ鋼棒１の一端部から突出し
ているナット１８内に、外周面に雄ねじを有するストッ
パ３が螺合され、かつそのストッパ３に挿通された固定
用ボルト１９は、ＰＣ鋼棒２の雌ねじ孔１２に螺合さ
れ、さらに中空ＰＣ鋼棒１の一端部のナット１８の前方
（中空ＰＣ鋼棒１の中間側）において、支圧板２０が嵌
設され、その支圧板２０はナット１８により支承され
る。1 through 4 show the implementation of the present invention, P
1 shows a state in which a C steel rod 2 is used as a reaction force bearing member to apply tensile prestress to the hollow PC steel rod 1, in which the male screw 11 at one end of the hollow PC steel rod 1 is attached to the nut 1
8 is screwed into a nut 18 projecting from one end of the hollow PC steel rod 1, a stopper 3 having a male screw on the outer peripheral surface is screwed, and the fixing bolt 19 inserted into the stopper 3 is , The internal threaded hole 12 of the PC steel rod 2 is screwed, and further, in front of the nut 18 at one end of the hollow PC steel rod 1 (the intermediate side of the hollow PC steel rod 1), the pressure support plate 20 is fitted and supported. The pressure plate 20 is supported by the nut 18.
【００１１】前記中空ＰＣ鋼棒１の他端部に設けられた
雄ねじ４に、ナット２１が螺合され、前記中空ＰＣ鋼棒
１に、ナット２１の前方（中空ＰＣ鋼棒１の中間側）に
おいて、支圧板２２が嵌設され、その支圧板２２はナッ
ト２１により支承される。A nut 21 is screwed into a male screw 4 provided at the other end of the hollow PC steel rod 1, and the hollow PC steel rod 1 is provided in front of the nut 21 (the intermediate side of the hollow PC steel rod 1). At, the pressure bearing plate 22 is fitted and the pressure bearing plate 22 is supported by the nut 21.
【００１２】中空ＰＣ鋼棒１の他端部に、支承筒５の一
端部の雌ねじ６が螺合され、かつ前記支承筒５の他端部
の雌ねじ７に環状係止片８の雄ねじ９が螺合され、さら
にＰＣ鋼棒２の他端部に嵌合された押圧係止片１０は、
前記環状係止片８に係合されている。この状態では、Ｐ
Ｃ鋼棒２に圧縮力が与えられると共に、中空ＰＣ鋼棒１
に引張力によるプレストレスが導入されている。A female screw 6 at one end of the support cylinder 5 is screwed into the other end of the hollow PC steel rod 1, and a male screw 9 of an annular locking piece 8 is attached to the female screw 7 at the other end of the support cylinder 5. The pressure locking piece 10 screwed and further fitted to the other end of the PC steel rod 2 is
It is engaged with the annular locking piece 8. In this state, P
A compressive force is applied to the C steel rod 2 and the hollow PC steel rod 1
Pre-stress due to tensile force has been introduced into.
【００１３】次に中空ＰＣ鋼棒１およびＰＣ鋼棒２とこ
れらに付属する部材を、コンクリート打設現場に運搬し
て、中空ＰＣ鋼棒１の端部を除く部分をコンクリート中
に埋め込む。Next, the hollow PC steel rod 1 and the PC steel rod 2 and the members attached thereto are transported to a concrete pouring site, and the portion of the hollow PC steel rod 1 excluding the end portion is embedded in concrete.
【００１４】前述のようにして、中空ＰＣ鋼棒１に引張
力を与えると共に、ＰＣ鋼棒２に圧縮力を与えたのち、
ＰＣ鋼棒セットを１単位とし、コンクリート部材の所定
の位置に、所定数のＰＣ鋼棒セットを配置し、そのＰＣ
鋼棒セットを埋め込むようにコンクリートを打設する。
そのコンクリートが所定の強度に達した後、支承筒５を
レンチにより回動して中空ＰＣ鋼棒１から外し、かつ中
空ＰＣ鋼棒１の表面とコンクリートとの付着を介して、
コンクリート部材に圧縮力を与える。As described above, after the tensile force is applied to the hollow PC steel rod 1 and the compressive force is applied to the PC steel rod 2,
PC steel rod set as one unit, a predetermined number of PC steel rod set is arranged at a predetermined position of the concrete member, and the PC
Pour concrete to embed the steel rod set.
After the concrete reaches a predetermined strength, the supporting cylinder 5 is rotated by a wrench to remove it from the hollow PC steel rod 1, and the surface of the hollow PC steel rod 1 is adhered to the concrete.
Apply compressive force to concrete members.
【００１５】次に本発明を実施する場合に使用する中空
ＰＣ鋼棒の緊張装置について説明する。水平な支持台２
３の一端部の上面に、上向きに開口する中空ＰＣ鋼棒嵌
入溝４１を有する支承台４２が固定され、前記支持台２
３の他端部の上面に液圧式押込用ジャッキ２６のシリン
ダ２７を支持しているジャッキ受台２８が固定され、前
記支持台２３の中間部の上面に、上向きに開口する中空
ＰＣ鋼棒嵌入溝２９を有する支承台２５が固定されてい
る。Next, the tensioning device for the hollow PC steel rod used when carrying out the present invention will be described. Horizontal support 2
A support base 42 having a hollow PC steel rod fitting groove 41 opening upward is fixed to the upper surface of one end of the support base 2.
The jack receiving base 28 supporting the cylinder 27 of the hydraulic pushing jack 26 is fixed to the upper surface of the other end of the No. 3, and the hollow PC steel rod fitting upwardly is inserted into the upper surface of the intermediate portion of the supporting base 23. A support 25 having a groove 29 is fixed.
【００１６】前記ジャッキ受台２８の内面に、環状支持
板３０が当接され、かつ前記押込用ジャッキ２６におけ
る支承筒５の先端側にピストン杆ガイド部材３１が配置
され、前記環状支持板３０とピストン杆ガイド部材３１
との間に、複数の管体からなるスペーサ３２が介在さ
れ、前記スペーサ３２と環状支持板３０およびピストン
杆ガイド部材３１とは溶接により結合されている。An annular support plate 30 is in contact with the inner surface of the jack receiving base 28, and a piston rod guide member 31 is arranged at the tip end side of the support cylinder 5 of the pushing jack 26, and the annular support plate 30 and Piston rod guide member 31
A spacer 32 made up of a plurality of pipes is interposed between and, and the spacer 32, the annular support plate 30, and the piston rod guide member 31 are joined by welding.
【００１７】前記支承台２５の両側面に、それぞれ上向
きに開口する中空ＰＣ鋼棒嵌入溝３３を有する一対のボ
ルト保持板３４，３５が当接され、４本のボルト３６
は、ジャッキ受台２８およびその両側面に当接されたナ
ット３７，環状支持板３０と、ピストン杆ガイド部材３
１およびスペーサ３２と、支承台２５およびその両側面
に当接されたボルト保持板３４，３５とにわたって挿通
され、各ボルト３６の端部にナット３７が螺合されてい
る。A pair of bolt holding plates 34, 35 each having a hollow PC steel rod fitting groove 33 opening upward are respectively brought into contact with both side surfaces of the support base 25, and four bolts 36 are provided.
Is a jack pedestal 28, a nut 37 abutting on both side surfaces thereof, an annular support plate 30, and a piston rod guide member 3.
1 and the spacer 32, and the support base 25 and the bolt holding plates 34 and 35 that are in contact with both side surfaces of the support base 25, and the nuts 37 are screwed onto the ends of the bolts 36.
【００１８】前記ボルト保持板３５の外面に係合する支
圧板２２は中空ＰＣ鋼棒１に嵌設され、前記支圧板２２
を支承するナット２１は、中空ＰＣ鋼棒１の他端部の雄
ねじ４に螺合されている。また前記押込用ジャッキ２６
におけるピストン杆３８は、ピストン杆ガイド部材３１
に嵌挿されている。A bearing plate 22 that engages with the outer surface of the bolt holding plate 35 is fitted on the hollow PC steel rod 1, and the bearing plate 22 is attached.
The nut 21 for supporting is screwed to the male screw 4 at the other end of the hollow PC steel rod 1. Also, the pushing jack 26
The piston rod 38 in FIG.
It is inserted in.
【００１９】前述のように構成された中空ＰＣ鋼棒の緊
張装置を使用して、ＰＣ鋼棒２を圧縮すると共に中空Ｐ
Ｃ鋼棒１に引張力を与える場合は、まず図２１に示すよ
うに、押圧部材３９における先端押込杆４０の先端部
を、環状係止片８内を通って押圧係止片１０に係合さ
せ、次いで押込用ジャッキ２６を伸長させることによ
り、図２２に示すように、押圧係止片１０を介してＰＣ
鋼棒２を圧縮し、押圧係止片１０を中空ＰＣ鋼棒１の他
端部に向かって移動させる。Using the hollow PC steel rod tensioning device constructed as described above, the PC steel rod 2 is compressed and the hollow P steel rod is hollowed.
When a tensile force is applied to the C steel rod 1, first, as shown in FIG. 21, the tip end portion of the tip pushing rod 40 of the pressing member 39 is passed through the annular engaging piece 8 and engaged with the pressing engaging piece 10. Then, by extending the pushing jack 26, as shown in FIG.
The steel rod 2 is compressed, and the pressing locking piece 10 is moved toward the other end of the hollow PC steel rod 1.
【００２０】次に図２３に示すように、支承筒５を中空
ＰＣ鋼棒１の中間側に向かって移動する方向Ｄに回転し
て、支承筒５の他端部に螺合されている環状係止片８
を、押圧係止片１０に係合させる。Next, as shown in FIG. 23, the support cylinder 5 is rotated in the direction D moving toward the intermediate side of the hollow PC steel rod 1, and is annularly screwed to the other end of the support cylinder 5. Locking piece 8
Are engaged with the pressing locking piece 10.
【００２１】次に必要に応じ、図２１ないし図２３に示
す動作を反復して行なわせる。Next, if necessary, the operations shown in FIGS. 21 to 23 are repeated.
【００２２】本発明によれば、中空ＰＣ鋼棒１の一端部
に、その中空鋼棒１内に挿入されたＰＣ鋼棒２の一端部
を係合するストッパ３を固定し、前記中空ＰＣ鋼棒１の
他端部の外周に設けた雄ねじ４に、支承筒５の一端部に
設けた雌ねじ６を螺合し、前記支承筒５の他端部に設け
た雌ねじ７に、環状係止片８の雄ねじ９を螺合し、前記
支承筒５内において、ＰＣ鋼棒２の端部に当接した押圧
係止片１０を前記環状係止片８と係合可能に設け、かつ
中空ＰＣ鋼棒１に係止した支圧板２２に反力をとった押
圧部材３９の先端押圧杆４０を、前記環状係止片８の挿
通孔１７に挿通して杆先端で前記押圧係止片１０を押圧
したうえ、支承筒５を推進回転可能に構成したので、例
えば、数ｔ〜５０ｔという非常に大きなプレストレスを
ＰＣ鋼棒に与える場合も、支承筒５には大きな回転抵抗
が加わらず、よって、支承筒５を円滑に回転させて、前
記大きなプレストレスをＰＣ鋼棒２にスムーズに与える
と共に、中空ＰＣ鋼棒１に引張りプレストレスを与える
ことが可能であり、かつその構造がきわめて簡潔であ
る。また、本発明では、中空ＰＣ鋼棒１に引張り力によ
るプレストレスを与えた状態に保持して運搬することが
できる。According to the present invention, a stopper 3 for engaging one end of a PC steel rod 2 inserted in the hollow steel rod 1 is fixed to one end of the hollow PC steel rod 1, and the hollow PC steel rod is fixed. A male screw 4 provided on the outer circumference of the other end of the rod 1 is screwed into a female screw 6 provided on one end of the bearing cylinder 5, and an annular locking piece is attached to a female screw 7 provided on the other end of the bearing cylinder 5. A male screw 9 of 8 is screwed into the support cylinder 5, and a pressing locking piece 10 abutting against the end of the PC steel rod 2 is provided in the supporting cylinder 5 so as to be engageable with the annular locking piece 8 and is hollow PC steel. The tip pressing rod 40 of the pressing member 39 having a reaction force against the bearing plate 22 locked to the rod 1 is inserted into the insertion hole 17 of the annular locking piece 8 to press the pressing locking piece 10 with the tip of the rod. In addition, since the support cylinder 5 is configured so as to be propulsive and rotatable, for example, a very large prestress of several t to 50 t is applied to the PC steel rod. In this case, the bearing cylinder 5 is not subjected to a large rotational resistance. Therefore, the bearing cylinder 5 is smoothly rotated to apply the large prestress to the PC steel rod 2 smoothly, and the hollow PC steel rod 1 is tension-pretensioned. It can be stressed and its structure is extremely simple. Further, according to the present invention, the hollow PC steel rod 1 can be held and transported while being prestressed by the tensile force.
【図１】本発明の実施例に係るプレストレスを導入され
た中空ＰＣ鋼棒の定着装置を示す一部切欠平面図であ
る。FIG. 1 is a partially cutaway plan view showing a fixing device for a prestressed hollow PC steel rod according to an embodiment of the present invention.
【図２】本発明の実施例に係るプレストレスを導入され
た中空ＰＣ鋼棒の定着装置を示す一部切欠横断平面図で
ある。FIG. 2 is a partially cutaway cross-sectional plan view showing a fixing device for a prestressed hollow PC steel rod according to an embodiment of the present invention.
【図３】図２の左側部分を拡大して示す横断平面図であ
る。FIG. 3 is a cross-sectional plan view showing a left side portion of FIG. 2 in an enlarged manner.
【図４】図２の右側部分を拡大して示す横断平面図であ
る。FIG. 4 is a cross-sectional plan view showing a right side portion of FIG. 2 in an enlarged manner.
【図５】中空ＰＣ鋼棒の一部切欠拡大横断平面図であ
る。FIG. 5 is a partially cutaway enlarged cross-sectional plan view of a hollow PC steel rod.
【図６】ＰＣ鋼棒の一部切欠横断平面図である。FIG. 6 is a partially cutaway cross-sectional plan view of a PC steel rod.
【図７】支承筒を示す横断平面図である。FIG. 7 is a cross-sectional plan view showing a support cylinder.
【図８】支承筒を示す正面図である。FIG. 8 is a front view showing a support cylinder.
【図９】押圧係止片を示す横断平面図である。FIG. 9 is a cross-sectional plan view showing a pressure locking piece.
【図１０】押圧係止片を示す正面図である。FIG. 10 is a front view showing a pressure locking piece.
【図１１】環状係止片を示す横断平面図である。FIG. 11 is a cross-sectional plan view showing an annular locking piece.
【図１２】環状係止片を示す正面図である。FIG. 12 is a front view showing an annular locking piece.
【図１３】中空ＰＣ鋼棒の緊張装置における先端押込杆
を押圧係止片に当接した状態を示す横断平面図である。FIG. 13 is a cross-sectional plan view showing a state in which a tip pushing rod of a tensioning device for a hollow PC steel rod is brought into contact with a pressing locking piece.
【図１４】図１３に示す部分の縦断側面図である。14 is a vertical cross-sectional side view of the portion shown in FIG.
【図１５】図１３の左上側部分を拡大して示す横断平面
図である。FIG. 15 is a cross-sectional plan view showing an enlarged upper left side portion of FIG.
【図１６】図１３の左下側部分を拡大して示す横断平面
図である。FIG. 16 is an enlarged cross-sectional plan view showing the lower left portion of FIG.
【図１７】図１３の右下側部分を拡大して示す横断平面
図である。FIG. 17 is an enlarged cross-sectional plan view showing the lower right portion of FIG.
【図１８】図１５のＡ−Ａ線断面図である。18 is a cross-sectional view taken along the line AA of FIG.
【図１９】図１６のＢ−Ｂ線断面図である。19 is a cross-sectional view taken along the line BB of FIG.
【図２０】図１７のＣ−Ｃ線断面図である。20 is a sectional view taken along line CC of FIG.
【図２１】中空ＰＣ鋼棒の緊張装置の押圧部材を押圧係
止片に係合させた状態を示す横断平面図である。FIG. 21 is a cross-sectional plan view showing a state in which the pressing member of the tensioning device for the hollow PC steel rod is engaged with the pressing locking piece.
【図２２】中空ＰＣ鋼棒の緊張装置によりＰＣ鋼棒を圧
縮した状態を示す横断平面図である。FIG. 22 is a cross-sectional plan view showing a state in which a PC steel rod is compressed by a tensioning device for a hollow PC steel rod.
【図２３】中空ＰＣ鋼棒の緊張装置における支承筒を回
転して、ＰＣ鋼棒を圧縮すると共に中空ＰＣ鋼棒にプレ
テンションを与えた状態を示す横断平面図である。FIG. 23 is a cross-sectional plan view showing a state in which the support cylinder of the tensioning device for a hollow PC steel rod is rotated to compress the PC steel rod and pretension the hollow PC steel rod.
【図２４】押圧部材を示す平面図である。FIG. 24 is a plan view showing a pressing member.
【図２５】押圧部材を示す正面図である。FIG. 25 is a front view showing a pressing member.
１ 中空ＰＣ鋼棒 ２ ＰＣ鋼棒 ３ ストッパ ４ 雄ねじ ５ 支承筒 ６ 雌ねじ ７ 雌ねじ ８ 環状係止片 ９ 雄ねじ １０ 押圧係止片 １１ 雄ねじ １２ 雌ねじ孔 １３ ６角形の外面 １４ 円形の中心孔 １５ ＰＣ鋼棒挿込孔 １６ 凹部 １７ 挿通孔 １８ ナット １９ 固定用ボルト ２０ 支圧板 ２１ ナット ２２ 支圧板 ２３ 支持台 ２５ 支承台 ２６ 押込用ジャッキ ２７ シリンダ ２８ ジャッキ受台 ２９ 中空ＰＣ鋼棒嵌入溝 ３０ 環状支持板 ３１ ピストン杆ガイド部材 ３２ スペーサ ３３ 中空ＰＣ鋼棒嵌入溝 ３４ ボルト保持板 ３５ ボルト保持板 ３６ ボルト ３７ ナット ３８ ピストン杆 ３９ 押圧部材 ４０ 先端押込杆 ４１ 中空ＰＣ鋼棒嵌入溝 ４２ 支承台 1 Hollow PC Steel Rod 2 PC Steel Rod 3 Stopper 4 Male Thread 5 Bearing Tube 6 Female Thread 7 Female Thread 8 Annular Locking Piece 9 Male Thread 10 Pressing Locking Piece 11 Male Thread 12 Female Threaded Hole 13 Hexagonal Outer Surface 14 Circular Center Hole 15 PC Steel Rod insertion hole 16 Recess 17 Insertion hole 18 Nut 19 Fixing bolt 20 Pressure plate 21 Nut 22 Pressure plate 23 Support base 25 Bearing base 26 Pushing jack 27 Cylinder 28 Jack receiving base 29 Hollow PC steel rod fitting groove 30 Annular support plate 31 Piston Rod Guide Member 32 Spacer 33 Hollow PC Steel Rod Fitting Groove 34 Bolt Holding Plate 35 Bolt Holding Plate 36 Bolt 37 Nut 38 Piston Rod 39 Pushing Member 40 Tip Push Rod 41 Hollow PC Steel Rod Fitting Groove 42 Bearing Base
Claims (1)
棒１内に挿入されたＰＣ鋼棒２の一端部を係合するスト
ッパ３を固定し、前記中空ＰＣ鋼棒１の他端部の外周に
設けた雄ねじ４に、支承筒５の一端部に設けた雌ねじ６
を螺合し、前記支承筒５の他端部に設けた雌ねじ７に、
環状係止片８の雄ねじ９を螺合し、前記支承筒５内にお
いて、ＰＣ鋼棒２の端部に当接した押圧係止片１０を前
記環状係止片８と係合可能に設け、かつ中空ＰＣ鋼棒１
に係止した支圧板２２に反力をとった押圧部材３９の先
端押圧杆４０を、前記環状係止片８の挿通孔１７に挿通
して杆先端で前記押圧係止片１０を押圧したうえ、支承
筒５を推進回転可能に構成したことを特徴とするプレス
トレスを導入された中空ＰＣ鋼棒の定着装置。1. A stopper 3 for engaging one end of a PC steel rod 2 inserted in the hollow steel rod 1 is fixed to one end of the hollow PC steel rod 1, and the other end of the hollow PC steel rod 1 is fixed. A male screw 4 provided on the outer periphery of the end portion and a female screw 6 provided on one end portion of the support cylinder 5
Screwed into the female screw 7 provided at the other end of the support cylinder 5,
The male screw 9 of the annular locking piece 8 is screwed, and the pressing locking piece 10 that is in contact with the end of the PC steel rod 2 is provided in the supporting cylinder 5 so as to be engageable with the annular locking piece 8. And hollow PC steel rod 1
In addition to inserting the tip pressing rod 40 of the pressing member 39 having a reaction force against the bearing plate 22 locked to the insertion hole 17 of the annular locking piece 8 to press the pressing locking piece 10 with the rod tip. The prestressed hollow PC steel rod fixing device is characterized in that the support cylinder 5 is configured to be propulsively rotatable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5308539A JP2534195B2 (en) | 1993-11-16 | 1993-11-16 | Fixing device for hollow PC steel rod with prestress |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5308539A JP2534195B2 (en) | 1993-11-16 | 1993-11-16 | Fixing device for hollow PC steel rod with prestress |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07139094A JPH07139094A (en) | 1995-05-30 |
| JP2534195B2 true JP2534195B2 (en) | 1996-09-11 |
Family
ID=17982250
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5308539A Expired - Lifetime JP2534195B2 (en) | 1993-11-16 | 1993-11-16 | Fixing device for hollow PC steel rod with prestress |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2534195B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006233463A (en) * | 2005-02-23 | 2006-09-07 | Oriental Construction Co Ltd | Breakwater, repairing/reinforcing structure and construction method of breakwater |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7144341B2 (en) * | 2019-02-20 | 2022-09-29 | 鹿島建設株式会社 | Concrete floor slab joint structure and concrete floor slab joint method |
| CN114753238B (en) * | 2022-05-07 | 2024-03-29 | 中铁十九局集团第六工程有限公司 | Prestressed steel bar device and construction method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS426756Y1 (en) * | 1966-06-10 | 1967-03-30 |
-
1993
- 1993-11-16 JP JP5308539A patent/JP2534195B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006233463A (en) * | 2005-02-23 | 2006-09-07 | Oriental Construction Co Ltd | Breakwater, repairing/reinforcing structure and construction method of breakwater |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07139094A (en) | 1995-05-30 |
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