JPH01247659A - Tensional method for pc steel in prestressed concrete structure - Google Patents
Tensional method for pc steel in prestressed concrete structureInfo
- Publication number
- JPH01247659A JPH01247659A JP7278088A JP7278088A JPH01247659A JP H01247659 A JPH01247659 A JP H01247659A JP 7278088 A JP7278088 A JP 7278088A JP 7278088 A JP7278088 A JP 7278088A JP H01247659 A JPH01247659 A JP H01247659A
- Authority
- JP
- Japan
- Prior art keywords
- concrete
- steel
- steel material
- hole
- wedge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 47
- 239000010959 steel Substances 0.000 title claims abstract description 47
- 239000011513 prestressed concrete Substances 0.000 title claims abstract description 9
- 238000000034 method Methods 0.000 title claims description 8
- 239000004567 concrete Substances 0.000 claims abstract description 28
- 239000000463 material Substances 0.000 claims description 46
- 238000005452 bending Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 3
- 238000000605 extraction Methods 0.000 description 3
- 241000257465 Echinoidea Species 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
Landscapes
- Reinforcement Elements For Buildings (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、プレストレストコンクリート構造物におけ
るＰＣ鋼材の緊張方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] This invention relates to a method for tensioning PC steel in prestressed concrete structures.
プレストレストコンクリート構造物は、コンクリートの
内部に、ＰＣ鋼材、ＰＣ鋼より線、ＰＣ鋼捧といった鋼
材を埋設し、この鋼材に緊張力を付与してこの緊張力に
よってコンクリートに生ずる引張応力を打ち消すように
したものである。Prestressed concrete structures are constructed by burying steel materials such as prestressed steel, prestressed steel strands, and prestressed steel beams inside the concrete, and applying tension to these steel materials to cancel out the tensile stress that occurs in the concrete. This is what I did.
ところで、従来、コンクリート中に埋設したＰＣ鋼材を
緊張する方法として、コンクリートの内部にＰＣ￥Ａ材
の埋設孔を水平に設け、この埋設孔にＰＣ鋼材を挿通し
、上記埋設孔の一方の端部において上記ＰＣ鋼材をコン
クリートに固定し、上記埋設孔の他方の端部に、ＰＣｉ
材の引出し孔をコンクリートの外面から垂直方向に設け
、上記ＰＣ鋼材の自由端側を上記引出し孔内に引出して
、ＰＣＪＩｌ材の自由端を緊張装置によって引張って上
記ＰＣＥ材に緊張力を付与し、上記埋設孔の他方の端部
に定着具を嵌め、この定着具とＰＣＥ材との間にウェッ
ジを挿し込んでＰＣ鋼材を定着具に固定する方法がある
。By the way, conventionally, as a method of tensioning a PC steel material buried in concrete, a hole for burying the PC\A material is provided horizontally inside the concrete, the PC steel material is inserted into this hole, and one end of the hole is inserted. The above-mentioned PC steel material is fixed to concrete in the section, and the PCi
A pull-out hole for the material is provided in a vertical direction from the outer surface of the concrete, the free end side of the PC steel material is pulled out into the draw-out hole, and the free end of the PCJIl material is pulled by a tensioning device to apply tension to the PCE material. There is a method of fixing the PC steel material to the fixing tool by fitting a fixing tool into the other end of the buried hole and inserting a wedge between the fixing tool and the PCE material.
上記緊張装置は、上記引出し孔内に設置され、ＰＣ鋼材
をその延長線上に引出してＰＣ鋼材に緊張力を付与する
ものであり、通常、油圧ジヤツキによって構成されてい
るので、緊張装置を設置する引出し孔の大きさは、ＰＣ
Ｅ材の延長方向に、即ち、水平方向に、油圧ジヤツキの
作業空間と、緊張させた際に発生するＰＣ＠材の引出し
呈とを加えた畏さが必要となり、その大きさはがなり大
きくなる。The tensioning device is installed in the draw-out hole and applies tension to the prestressing steel material by drawing it out on its extension line, and is usually configured with a hydraulic jack, so the tensioning device is installed. The size of the drawer hole is PC
In the extension direction of the E material, that is, in the horizontal direction, it is necessary to add a working space for the hydraulic jack and the pulling out of the PC@ material that occurs when it is under tension, and its size becomes large. Become.
この大きな引出し孔によって、従来は、スラブの強度劣
化をきたすなど、コンクリート自体の品質が悪くなると
いう問題と共に、この大きな引出し孔を埋め戻すのに手
間がかがるという問題があった。Conventionally, this large extraction hole has caused problems such as deterioration of the strength of the slab and poor quality of the concrete itself, as well as the problem that it takes time and effort to backfill the large extraction hole.
そこで、この発明は、引出し孔をできるだけ小さくする
ことができる２０日材の緊張方法を提供しようとするも
のである。Therefore, the present invention aims to provide a method for tensioning 20-day lumber that can make the pull-out hole as small as possible.
この発明は、上記の課題を解消するために、−ト記引出
し孔内に引出したＰＣＥ材の自由端部を水平方向から垂
直方向湾曲せしめる湾曲ガイドを上記引出し孔内に設置
し、コンクリートの外面に緊張装置を設置し、上記湾曲
ガイドを介してコンクリートの外面に引出したＰＣＥ材
の自由端部を上記緊張装置によって引張るようにしたの
である。In order to solve the above-mentioned problems, this invention installs a curving guide in the above-mentioned withdrawal hole to curve the free end of the PCE material pulled out into the withdrawal hole from the horizontal direction to the vertical direction, and A tensioning device was installed in the concrete, and the free end of the PCE material pulled out to the outer surface of the concrete via the curved guide was pulled by the tensioning device.
上記湾曲ガイドによって、ＰＣ鋼材の自由端部が水平方
向から垂直方向に湾曲されてコンクリートの外面に引出
される。これにより、緊張装置はコンクリートの外面に
設置されるので、引出し孔の水平方向の長さに、ＰＣＥ
材の引出し量を加える必要がなくなり、引出し孔の大き
さを極力小さくすることができる。The free end of the PC steel material is bent from the horizontal direction to the vertical direction and pulled out to the outer surface of the concrete by the curved guide. This allows the tensioning device to be installed on the outer surface of the concrete, so that the horizontal length of the extraction hole is
There is no need to increase the amount of material to be drawn out, and the size of the drawing hole can be made as small as possible.
以下、この発明の実施例を添付図面に基づいて説明する
。Embodiments of the present invention will be described below with reference to the accompanying drawings.
スラブ等を構成するコンクリート１の内部には、ＰＣ＠
Ｃ２Ｏ４通する埋設孔３が水平に設置されている。上記
ＰＣ鋼材２としては、ＰＣ鋼材、ＰＣＦＩより線、ＰＣ
鋼棒等が使用されている。このＰＣ鋼材２の一端は上記
埋設孔３の一方の端部において定着具（図示せず）によ
って固定されている。上記埋設孔３の他方の端部には、
ＰＣ＠Ｃ２Ｏ４出し孔４が、コンクリート１の外面から
垂直方向に形成されている。Inside the concrete 1 that constitutes the slab etc., there is a PC@
A buried hole 3 through which C2O4 passes is installed horizontally. The above-mentioned PC steel material 2 includes PC steel material, PCFI stranded wire, PC
Steel rods etc. are used. One end of this PC steel material 2 is fixed at one end of the buried hole 3 by a fixing device (not shown). At the other end of the buried hole 3,
A PC@C2O4 outlet hole 4 is formed in a vertical direction from the outer surface of the concrete 1.
上記引出、し孔４内には、ＰＣ鋼材２を水平方向から垂
直方向に湾曲せしめる湾曲ガイド５が設置され、ＰＣＥ
材２の自由端が上記湾曲ガイド５を介してコンクリート
１の外面に引出されている。A bending guide 5 is installed in the drawer hole 4 to bend the PC steel material 2 from the horizontal direction to the vertical direction.
The free end of the material 2 is drawn out to the outer surface of the concrete 1 via the curved guide 5.
上記湾曲ガイド５のコンクリート１外面倒０：１１部に
は、ＰＣＥ材２の自由端を引張る油圧ジヤツキからなる
緊張装置６が設置されている。A tensioning device 6 consisting of a hydraulic jack for tensioning the free end of the PCE material 2 is installed at the 0:11 portion of the outside surface of the concrete 1 of the curved guide 5.
また、湾曲ガイド５の一方の端部には、埋設孔３の端部
に嵌めた定着具７との間に、ウェッジ押込み装置８が設
置されている。ウェッジ９は、定着具７の内面とＰＣ鋼
材２の外面との間に挿し込んで、ＰＣ鋼材２を定着具７
に固定するものである。このウェッジ９の押込み装置８
は、ＰＣ！！Ｅｌ材２に対して移動可能に被せられた定
着ラム１０によって構成され、この定着ラム１０は油圧
回路、あるいはスプリングによって押込み方向に移動す
るようになっている。Furthermore, a wedge pushing device 8 is installed between one end of the curved guide 5 and a fixing tool 7 fitted into the end of the buried hole 3 . The wedge 9 is inserted between the inner surface of the fixing tool 7 and the outer surface of the PC steel material 2, and the PC steel material 2 is attached to the fixing tool 7.
It is to be fixed at This wedge 9 pushing device 8
Ha, PC! ! It consists of a fixing ram 10 movably placed over the El material 2, and this fixing ram 10 is moved in the pushing direction by a hydraulic circuit or a spring.
上記緊張装置６によってＰＣ鋼材２の自由端を引張ると
、ＰＣＥＣ２Ｏ４出しに追従してウェッジＳが定着具７
から抜は出してくる。このため、ＰＣ鋼材２を緊張させ
た後、緊張装置６の引張り力を解放すると、ＰＣ鋼材２
の引戻し力によってウェッジ９が定着具７内に固定され
る位置まで戻され、これによって緊張力が減少する（セ
ンドロス）。このため、緊張装置６の引張り力を解放す
る前に、ウェッジ押込み装置８によってウェッジ９を押
し込み、ウェッジＳを定着具７内に固定しておくと、緊
張力の減少を防止することができる。When the free end of the PC steel material 2 is pulled by the tension device 6, the wedge S follows the PCEC2O4 release and the fixing tool 7
I'll bring out the excerpt. For this reason, when the tensile force of the tensioning device 6 is released after tensioning the PC steel material 2, the PC steel material 2
The pulling back force causes the wedge 9 to be returned to the position where it is fixed in the anchor 7, thereby reducing the tension (send loss). Therefore, if the wedge 9 is pushed in by the wedge pushing device 8 and the wedge S is fixed in the fixing device 7 before the tensioning force of the tensioning device 6 is released, a reduction in the tensioning force can be prevented.
この発明によれば、以上のように、コンクリートに設け
るＰＣＦＩ材の引出し孔の大きさを極力小さくすること
ができるので、プレストレストコンクリートの構造物の
強度を向上させると共に、引出し孔の埋め戻しに要する
手間も少なくなるという効果がある。According to the present invention, as described above, the size of the pull-out hole of the PCFI material provided in the concrete can be made as small as possible, so that the strength of the prestressed concrete structure is improved and the amount required for backfilling the pull-out hole is improved. This has the effect of reducing time and effort.
第１図はこの発明の実施状態を示す断面図であ１・・・
・・・コンクリート、２・・・・・・ＰＣＥ材、３・・
・・・・埋設孔、 ４・・・・・・引出し孔、５・
・・・・・湾曲ガイド、 ６・・・・・・緊張装置、７
・・・・・・定着具、 ８・・・・・・ウェッジ押
込み装置、９・・・・・・ウニソノ。
特許出願人 住友電気工業株式会社
同 代理人 鎌 １） 文 −第１図FIG. 1 is a sectional view showing the state of implementation of this invention.
...Concrete, 2...PCE material, 3...
... Buried hole, 4... Pull-out hole, 5.
...Curved guide, 6...Tension device, 7
... Fixing tool, 8 ... Wedge pushing device, 9 ... Sea urchin sono. Patent applicant: Sumitomo Electric Industries, Ltd. Agent: Kama 1) Text - Figure 1
Claims (2)
設け、この埋設孔にＰＣ鋼材を挿通し、上記埋設孔の一
方の端部において上記ＰＣ鋼材をコンクリートに固定し
、上記埋設孔の他方の端部に、ＰＣ鋼材の引出し孔をコ
ンクリートの外面から垂直方向に設け、上記ＰＣ鋼材の
自由端側を上記引出し孔内に引出して、ＰＣ鋼材の自由
端を緊張装置によって引張って上記ＰＣ鋼材に緊張力を
付与し、上記埋設孔の他方の端部に定着具を嵌め、この
定着具とＰＣ鋼材との間にウェッジを挿し込んでＰＣ鋼
材を定着具に固定するプレストレストコンクリート構造
物におけるＰＣ鋼材の緊張方法において、上記引出し孔
内に引出したＰＣ鋼材の自由端部を水平方向から垂直方
向に湾曲せしめる湾曲ガイドを上記引出し孔内に設置し
、コンクリートの外面に上記緊張装置を設置し、上記湾
曲ガイドを介してコンクリートの外面に引き出したＰＣ
鋼材の自由端部を上記緊張装置によって引張ることを特
徴とするプレストレストコンクリート構造物におけるＰ
Ｃ鋼材の緊張方法。(1) A hole for burying the PC steel material is provided horizontally inside the concrete, the PC steel material is inserted into the hole, the PC steel material is fixed to the concrete at one end of the hole, and the other end of the hole is fixed to the concrete. A pull-out hole for the PC steel material is provided at the end of the concrete in a vertical direction from the outer surface of the concrete, and the free end side of the PC steel material is pulled out into the draw-out hole, and the free end of the PC steel material is pulled by a tensioning device to tighten the PC steel material. PC in a prestressed concrete structure in which tension is applied to the hole, a fixing tool is fitted to the other end of the buried hole, and a wedge is inserted between the fixing tool and the PC steel material to fix the PC steel material to the fixing tool. In the steel material tensioning method, a curving guide that curves the free end of the PC steel material pulled out into the draw-out hole from a horizontal direction to a vertical direction is installed in the draw-out hole, and the tension device is installed on the outer surface of the concrete; PC pulled out to the outer surface of concrete via the above curved guide
P in a prestressed concrete structure characterized in that the free end of the steel material is stretched by the tensioning device described above.
Tensioning method for C steel.
み装置を設置し、上記緊張装置によってＰＣ鋼材を引張
ってＰＣ鋼材に緊張力を付与し、この緊張力を保持した
状態で上記ウェッジ押し込み装置によってウェッジを定
着具とＰＣ鋼材との間に挿し込むことを特徴とする請求
項（１）記載のプレストレストコンクリート構造物にお
けるＰＣ鋼材の緊張方法。(2) A wedge pushing device is installed between the curved guide and the fixing device, the tension device is used to pull the PC steel material to apply tension to the PC steel material, and while this tension is maintained, the wedge pushing device 2. A method for tensioning prestressed concrete steel in a prestressed concrete structure according to claim 1, characterized in that a wedge is inserted between the fixing tool and the prestressed steel by using the following steps.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7278088A JPH01247659A (en) | 1988-03-26 | 1988-03-26 | Tensional method for pc steel in prestressed concrete structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7278088A JPH01247659A (en) | 1988-03-26 | 1988-03-26 | Tensional method for pc steel in prestressed concrete structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01247659A true JPH01247659A (en) | 1989-10-03 |
| JPH0517342B2 JPH0517342B2 (en) | 1993-03-08 |
Family
ID=13499244
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7278088A Granted JPH01247659A (en) | 1988-03-26 | 1988-03-26 | Tensional method for pc steel in prestressed concrete structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01247659A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19539748A1 (en) * | 1995-10-26 | 1997-04-30 | Dyckerhoff & Widmann Ag | Stressed concrete structural part |
| KR100739879B1 (en) * | 2006-09-05 | 2007-07-16 | (주)써포텍 | Device |
| KR101288104B1 (en) * | 2011-04-13 | 2013-07-19 | 김용만 | Steel Strand Guide Holder and Steel Strand Tension Device using the same |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58191869A (en) * | 1982-05-07 | 1983-11-09 | 大成建設株式会社 | Tensioning of pc cable |
| JPS6325751U (en) * | 1986-08-01 | 1988-02-19 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5848576A (en) * | 1981-09-18 | 1983-03-22 | Hitachi Ltd | Focus voltage generating circuit for automatic focusing device |
-
1988
- 1988-03-26 JP JP7278088A patent/JPH01247659A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58191869A (en) * | 1982-05-07 | 1983-11-09 | 大成建設株式会社 | Tensioning of pc cable |
| JPS6325751U (en) * | 1986-08-01 | 1988-02-19 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19539748A1 (en) * | 1995-10-26 | 1997-04-30 | Dyckerhoff & Widmann Ag | Stressed concrete structural part |
| KR100739879B1 (en) * | 2006-09-05 | 2007-07-16 | (주)써포텍 | Device |
| KR101288104B1 (en) * | 2011-04-13 | 2013-07-19 | 김용만 | Steel Strand Guide Holder and Steel Strand Tension Device using the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0517342B2 (en) | 1993-03-08 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |