JPS6355379B2 - - Google Patents
Info
- Publication number
- JPS6355379B2 JPS6355379B2 JP18660381A JP18660381A JPS6355379B2 JP S6355379 B2 JPS6355379 B2 JP S6355379B2 JP 18660381 A JP18660381 A JP 18660381A JP 18660381 A JP18660381 A JP 18660381A JP S6355379 B2 JPS6355379 B2 JP S6355379B2
- Authority
- JP
- Japan
- Prior art keywords
- steel
- stranded
- grip
- crimp
- plate
- 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
Links
- 229910000831 Steel Inorganic materials 0.000 claims description 28
- 239000010959 steel Substances 0.000 claims description 28
- 238000000034 method Methods 0.000 claims description 6
- 238000002788 crimping Methods 0.000 claims description 5
- 238000003780 insertion Methods 0.000 claims 1
- 230000037431 insertion Effects 0.000 claims 1
- 239000004567 concrete Substances 0.000 description 11
- 238000005336 cracking Methods 0.000 description 2
- 238000009415 formwork Methods 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000011513 prestressed concrete Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/08—Members specially adapted to be used in prestressed constructions
- E04C5/12—Anchoring devices
- E04C5/125—Anchoring devices the tensile members are profiled to ensure the anchorage, e.g. when provided with screw-thread, bulges, corrugations
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Wire Processing (AREA)
Description
【発明の詳細な説明】
この発明は建築構造物のコンクリートスラブな
どに用いるPC鋼撚線の固定側定着端部の処理方
法に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for treating fixed-side fixed ends of stranded PC steel wires used in concrete slabs of building structures and the like.
最近建築用の各種コンクリートスラブにおい
て、ひび割れ、たるみなどの防止のためPC鋼撚
線を用いてプレストレスコンクリートとすること
が多くなつている。この場合緊張するPC鋼撚線
の配置や定着部の配置などに非常に施工性と施工
精度が要求される。一般に比較的スパンの短いス
ラブにおいては、PC鋼撚線を片側緊張すること
によつてプレストレスを導入するが、この時緊張
しない側（固定側）には施工性を良くする為、予
め工場において必要な長さにPC鋼撚線を切断し
て一端に鋼製のスリーブを圧着（以下圧着グリツ
プという）したものを使用するのが通常である。
たとえば第１図に示すようにコンクリートの型枠
１内に支圧板４を置き、これに定着に切断したポ
リエチレンシースを冠せたアンボンドPC鋼撚線
２の一端に圧着グリツプ３を圧着したものを通し
て配置し、コンクリートを流し込んで固めてコン
クリートが固化してからPC鋼撚線を他端から緊
張してプレストレスを導入する方法がある。しか
し従来の方法では支圧板と圧着グリツプが一体と
なつて固定されていない為施工性が悪く、またコ
ンクリート打設中にコンクリートをつきかためる
為のバイブレーターの振動やその他の原因によつ
て支圧板の孔とPC鋼撚線の中心のずれ、あるい
は支圧板とPC鋼撚線、圧着グリツプの直角性が
悪くなる場合がある。PC鋼撚線に与える緊張力
は圧着グリツプ、支圧板を介してコンクリートに
伝えられるが支圧板、圧着グリツプなどの配置が
正確でないと緊張力を導入した時発生する定着部
での割裂応力によりコンクリート表面にひび割れ
の発生などが生じる危険がある。 Recently, in order to prevent cracking, sagging, etc. in various types of concrete slabs for construction, prestressed concrete using prestressed steel wires has become common. In this case, extremely high workability and precision are required for the placement of the tensile PC steel strands and the placement of the anchoring parts. Generally, in slabs with relatively short spans, prestress is introduced by tensioning the PC steel strands on one side, but at this time, the side that is not tensioned (fixed side) is pre-stressed at the factory in order to improve workability. Usually, PC steel strands are cut to the required length and a steel sleeve is crimped to one end (hereinafter referred to as a crimping grip).
For example, as shown in Fig. 1, a bearing plate 4 is placed in a concrete formwork 1, and a crimp grip 3 is crimped onto one end of an unbonded PC steel strand 2 with a cut polyethylene sheath attached to it. There is a method to introduce prestress by placing the PC steel strands under tension from the other end after the concrete has hardened by pouring concrete. However, in the conventional method, the bearing plate and the crimp grip are not fixed as one unit, resulting in poor workability.Also, during concrete pouring, the vibration of the vibrator used to compact the concrete and other causes may cause the bearing plate to sag. The center of the hole and the PC steel strands may be misaligned, or the perpendicularity between the bearing plate, the PC steel strands, and the crimp grip may deteriorate. The tension applied to the PC steel strands is transmitted to the concrete through the crimp grips and bearing pressure plates, but if the bearing plates and crimp grips are not placed correctly, splitting stress at the anchorage that occurs when tension is introduced will cause the concrete to crack. There is a risk of cracks occurring on the surface.
この発明は一定の長さのPC鋼撚線の一端の圧
着グリツプと支圧板を一体化して固定するように
処理するもので上記欠点を解消したPC鋼撚線の
固定端の処理方法を提供するものである。 This invention provides a method for processing fixed ends of stranded PC steel wires, which eliminates the above-mentioned drawbacks, by processing one end of a stranded PC steel wire of a certain length so that a crimping grip and a bearing plate are integrated and fixed. It is something.
以下図面にしたがつて本発明の実施例を説明す
る。 Embodiments of the present invention will be described below with reference to the drawings.
第２図、第３図に示すように一定の長さに切断
したPC鋼撚線２の一端に鋼製スリーブすなわち
圧着グリツプ３を圧着する。その場合PC鋼撚線
の端末２′が10〜20mm圧着グリツプから突出する
ように圧着する。つぎにPC鋼撚線２を支圧板４
の孔を通し、一方PC鋼撚線２の外径より僅かに
大きな中心穴を有する支持板８を圧着グリツプの
端部に当て、先端をネジ切りした支持棒６を支圧
板４の孔に通したのちナツト７を回転して支圧板
４と支持板８を圧着グリツプ３を挟んで締めつけ
ることによつて支圧板４と圧着グリツプ３を一体
化して固定する。この場合支圧板と支持板を締め
つける支持棒としてはボルトやナツトを使用して
も良く図示の先端が曲がつた支持棒に限定される
ものではない。 As shown in FIGS. 2 and 3, a steel sleeve, ie, a crimp grip 3, is crimped onto one end of the PC steel strand 2 cut to a certain length. In this case, the PC steel strands are crimped in such a way that their ends 2' protrude from the crimping grips by 10 to 20 mm. Next, connect the PC steel strands 2 to the bearing plate 4.
On the other hand, a support plate 8 having a center hole slightly larger than the outer diameter of the PC steel stranded wire 2 is placed on the end of the crimp grip, and a support rod 6 with a threaded tip is passed through the hole in the bearing pressure plate 4. Thereafter, by rotating the nut 7 and tightening the pressure plate 4 and the support plate 8 with the crimp grip 3 in between, the pressure plate 4 and the crimp grip 3 are integrally fixed. In this case, the support rod for tightening the bearing pressure plate and the support plate may be a bolt or a nut, and is not limited to the illustrated support rod having a bent tip.
以上詳しく説明したように本発明は一定の長さ
に切断したPC鋼撚線の定着端を圧着グリツプと
支圧板が一体となるようにして固着せしめる処理
方法であり、この処理したPC鋼撚線を使用すれ
ばPC鋼撚線の定着端部を配置するとき施工性が
非常に良く、また施工精度が良くなりストレス導
入後のひび割れなどを防止できるものである。 As explained in detail above, the present invention is a processing method for fixing the fixing end of a PC steel strand cut to a certain length so that a crimp grip and a bearing plate are integrated, and the treated PC steel strand By using this method, the workability is very good when arranging the fixed end of the PC steel stranded wire, and the work accuracy is also improved and cracking after stress is introduced can be prevented.
第１図はコンクリートスラブの製造方法を示す
断面図。第２図、第３図は本発明のPC鋼撚線の
端末処理方法を示す側面図、正面図である。
１…型枠、２…PC鋼撚線、２′…突出端、３…
圧着グリツプ、４…支圧板、５…コンクリート、
６…支持棒、７…ナツト、８…支持板。
FIG. 1 is a cross-sectional view showing a method of manufacturing a concrete slab. FIGS. 2 and 3 are a side view and a front view showing the terminal treatment method for PC steel stranded wire of the present invention. 1...Formwork, 2...PC steel stranded wire, 2'...Protruding end, 3...
Crimp grip, 4... bearing plate, 5... concrete,
6...Support rod, 7...Nut, 8...Support plate.
Claims (1)
支圧板４の中心孔に挿通し、次いで圧着グリツプ
３に挿入して該圧着グリツプを圧着固定したPC
鋼撚線の定着端構造部において、PC鋼撚線の外
径より僅かに大きな中心孔を有する支持板８を圧
着グリツプ３の端面から10〜20mm突出したPC鋼
撚線の突出端２′に挿通し、支圧板４と支持板８
を圧着グリツプ３の両端を挟み込むように、一端
を螺子加工し他端を鉤状に折り曲げ加工した複数
の支持棒６を用いてネジにより締め付けて、支圧
板４を圧着グリツプ３の端面に密着固定すること
を特徴とするPC鋼撚線の定着端部処理方法。1 Insert the end of the PC steel stranded wire 2 cut to a predetermined length into the center hole of the bearing pressure plate 4, then insert it into the crimp grip 3, and fix the crimp grip by crimping the PC.
In the fixed end structure of the stranded steel wire, a support plate 8 having a center hole slightly larger than the outer diameter of the stranded PC steel wire is attached to the protruding end 2' of the stranded PC steel wire, which protrudes 10 to 20 mm from the end surface of the crimping grip 3. Insertion, bearing pressure plate 4 and support plate 8
A plurality of support rods 6, one end of which is threaded and the other end bent into a hook shape, are tightened with screws so as to sandwich both ends of the crimp grip 3, and the bearing plate 4 is tightly fixed to the end surface of the crimp grip 3. A method for processing a fixed end of a PC steel stranded wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18660381A JPS5890337A (en) | 1981-11-20 | 1981-11-20 | Treatment for fixing end of pc steel stranded wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18660381A JPS5890337A (en) | 1981-11-20 | 1981-11-20 | Treatment for fixing end of pc steel stranded wire |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5890337A JPS5890337A (en) | 1983-05-30 |
| JPS6355379B2 true JPS6355379B2 (en) | 1988-11-02 |
Family
ID=16191447
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18660381A Granted JPS5890337A (en) | 1981-11-20 | 1981-11-20 | Treatment for fixing end of pc steel stranded wire |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5890337A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0517827Y2 (en) * | 1989-10-04 | 1993-05-12 |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0275431A (en) * | 1988-09-12 | 1990-03-15 | Hokkai Koki Kk | Working method for pc steel stranded wire rolled threads |
| US7066142B2 (en) | 2002-09-11 | 2006-06-27 | Mikuni Corporation | Multiple throttle apparatus |
-
1981
- 1981-11-20 JP JP18660381A patent/JPS5890337A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0517827Y2 (en) * | 1989-10-04 | 1993-05-12 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5890337A (en) | 1983-05-30 |
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