JPH0549790B2 - - Google Patents
Info
- Publication number
- JPH0549790B2 JPH0549790B2 JP26979485A JP26979485A JPH0549790B2 JP H0549790 B2 JPH0549790 B2 JP H0549790B2 JP 26979485 A JP26979485 A JP 26979485A JP 26979485 A JP26979485 A JP 26979485A JP H0549790 B2 JPH0549790 B2 JP H0549790B2
- Authority
- JP
- Japan
- Prior art keywords
- fixing
- concrete
- reinforcing bar
- main body
- bars
- 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
- 230000003014 reinforcing effect Effects 0.000 claims description 29
- 239000004567 concrete Substances 0.000 claims description 14
- 229910000831 Steel Inorganic materials 0.000 claims description 12
- 239000010959 steel Substances 0.000 claims description 12
- 238000004873 anchoring Methods 0.000 claims description 11
- 238000000034 method Methods 0.000 description 6
- 230000002787 reinforcement Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 239000011513 prestressed concrete Substances 0.000 description 4
- 238000009415 formwork Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
Landscapes
- Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
- Reinforcement Elements For Buildings (AREA)
Description
【発明の詳細な説明】
「産業上の利用分野」
本発明はプレストレスコンクリート構造物をポ
ストテンシヨン方式にて型枠成型する際に、その
型枠内に配設される各種補強筋のうち、PC鋼材
定着具直下のコンクリート内に埋設されるように
配される定着部用補強筋の取り付け構造に関する
ものである。[Detailed Description of the Invention] "Industrial Application Field" This invention is one of the various reinforcing bars installed in the formwork when forming a prestressed concrete structure using the post-tension method. , relates to a structure for attaching reinforcing bars for anchoring parts that are placed so as to be buried in concrete directly below the PC steel anchoring fixtures.
「従来の技術」
プレストレスコンクリートは、いわゆるPC鋼
材によつてコンクリートに圧縮応力を与えたもの
であつて、コンクリートの引張強度の不足を補
い、設計荷重範囲内では引張に対しても圧縮に対
しても同じ力学的性質を確保し、かつひびわれの
生じない構造ができることから、近年において
は、梁や床版などの各種コンクリート構造物に広
く適用されている。``Conventional technology'' Prestressed concrete is a method in which compressive stress is applied to concrete using so-called prestressed steel.It compensates for the lack of tensile strength of concrete, and is resistant to both tension and compression within the design load range. In recent years, it has been widely applied to various types of concrete structures such as beams and floor slabs, as it ensures the same mechanical properties and creates a crack-free structure.
このようなプレストレスコンクリート構造物
は、場所打ち及び工場生産のいずれにしても型枠
成型にて形成されるが、その際、コンクリートを
打設する前に予め、プレストレス導入用のPC鋼
材や各種補強筋を配設しておく必要がある。特
に、ポストテンシヨン方式にてプレストレスを導
入する場合、PC鋼材定着具直下のコンクリート
には大きな圧縮応力が集中するため、この部分に
いわゆる割裂補強筋などと称されている定着部用
補強筋が埋設されるように配設しておく必要があ
る。 Such prestressed concrete structures are formed by molding, whether cast in place or manufactured in a factory, but in this case, prestressing prestressing materials such as prestressing steel or It is necessary to arrange various reinforcing bars. In particular, when introducing prestress using the post-tension method, large compressive stress concentrates on the concrete directly below the PC steel anchorage, so reinforcing reinforcement for the anchorage, known as so-called split reinforcement, is placed in this area. It is necessary to arrange it so that it is buried.
「発明が解決しようとする問題点」
ところが、このような定着部用補強筋を、型枠
内の定位置に予め配設しておく場合、同位置の中
央にはPC鋼材をまず配置し、さらに緊張端側の
定着具が埋め込みタイプであればその定着具も配
設しておかなければならないため、該定着部用補
強筋を所定位置にセツトするのが困難となる場合
が多く、このような場合には、その定着部用補強
筋を吊り下げたり、セツト用補強筋を近くまで延
在させてきてこれに固定したりする方法などを採
つていたが、手間がかかるうえに精度よく配置で
きないという問題点があつた。``Problem to be Solved by the Invention'' However, when such reinforcing bars for anchorage parts are placed in advance at fixed positions within the formwork, it is necessary to first place a prestressing steel material in the center of the same position. Furthermore, if the anchoring device on the tension end side is a recessed type, that anchoring device must also be installed, which often makes it difficult to set the reinforcing bar for the anchoring part in a predetermined position. In such cases, methods such as suspending the reinforcing bar for the anchoring part, or extending the reinforcing bar for the setting part nearby and fixing it to it have been adopted, but these methods are time-consuming and inaccurate. There was a problem that it could not be placed.
「問題点を解決するための手段」
そこで、本発明では、プレストレスを導入すべ
きコンクリート構造物の端面に埋設されて使用さ
れるPC鋼材用定着具の本体部内面側に突出部を
設け、この突出部に、定着具直下のコンクリート
内に埋設するための定着部用補強筋を、該突出部
の周りに嵌合させて装着した取付筋を介して取り
付ける構造としたものである。"Means for solving the problem" Therefore, in the present invention, a protrusion is provided on the inner surface of the main body of a fixing device for prestressing steel that is used by being buried in the end face of a concrete structure to which prestress is to be introduced. The structure is such that a reinforcing bar for the fixing part, which is to be buried in the concrete immediately below the fixing tool, is attached to this protruding part via a mounting bar fitted around the protruding part.
ここで、前記突出部の周りに嵌合させて装着す
取り付け筋としては、配設すべき定着部用補強筋
の形態により、それ自体単独構成としたり、該取
り付け筋と補強筋の双方を一つの連続する鉄筋で
一体に構成したりするのが望ましい。 Here, depending on the form of the reinforcing bar for the fixing part to be provided, the attachment bar to be fitted around the protrusion may be a stand-alone structure, or both the attachment bar and the reinforcing bar may be combined together. It is preferable to construct it as one piece with two continuous reinforcing bars.
「作用」
定着部用補強筋は、定着部の本体部内面側の突
出部に取付筋を介して取り付けられるが、取付筋
は突出部外周に嵌合させて取り付ける構造となつ
ているので、その作業がきわめて容易となり、ま
た定着具自体が基準となるので、定着部用補強筋
の配設を精度良く行える。"Function" The reinforcing bars for the anchoring part are attached to the protrusion on the inner surface of the main body of the fixing part via the attachment bars, but since the attachment bars are attached by fitting into the outer periphery of the protrusion, The work becomes extremely easy, and since the fixing tool itself serves as a reference, the reinforcing bars for the fixing portion can be placed with high precision.
「実施例」
以下、本発明を図面に示す実施例に基づいて説
明する。"Embodiments" The present invention will be described below based on embodiments shown in the drawings.
第１図ないし第５図は、本発明の一実施例を示
すもので、これらの図において、符号１は、ポス
トテンシヨン方式にてプレストレスを導入する際
に適用されるキヤステイングタイプの緊張端用定
着具である。この定着具１はプレストレス導入時
にコンクリートに対する支圧板を兼ねる厚肉の本
体部２と、この本体部２の内面２ａ側に、該本体
部２と同軸的に突設された突出部３と、これらの
中心をその軸線方向に貫通するPC鋼材挿通孔４
とを備えている。前記突出部３の外周面は、その
先端部に形成された小径筒状部３ａに向かうに従
い小径となるテーパ面に形成されている。さら
に、この本体部２の外周面であつて前記本体部２
に近接した位置にはフランジ部４が形成され、こ
れによつて該フランジ部４と本体部２との間には
円形首部５が形成されている。 Figures 1 to 5 show one embodiment of the present invention, and in these figures, reference numeral 1 indicates a casting type tension applied when introducing prestress by the post tension method. It is an end fixing tool. This fixing tool 1 includes a thick main body part 2 which also serves as a bearing pressure plate for concrete when prestressing is introduced, a protrusion part 3 coaxially provided with the main body part 2 on the inner surface 2a side of this main body part 2, A PC steel material insertion hole 4 passes through the center of these in the axial direction.
It is equipped with The outer circumferential surface of the protrusion 3 is formed into a tapered surface that becomes smaller in diameter toward a small-diameter cylindrical portion 3a formed at its tip. Further, on the outer circumferential surface of this main body portion 2, the main body portion 2
A flange portion 4 is formed in the vicinity of the flange portion 4 , thereby forming a circular neck portion 5 between the flange portion 4 and the main body portion 2 .
そして、この実施例では、前記定着具１の直下
におけるコンクリートに埋設すべき定着部用補強
筋６は、前記突出部３の首部５が装着される一対
の取付筋７，８を介してその定着具１に取り付け
られ、型枠内の所定位置に配設される。該取付筋
７，８は、それぞれについて、前記円形首部５を
挟みつける形態でそこへ嵌まり込むように円弧状
に曲げ形成された対構成の嵌合部７ａ，７ａ及び
８ａ，８ａと、補強筋６が取り付けられるアーム
部７ｂ，８ｂとを有する構成となつている。取付
筋７，８のアーム部７ｂ，８ｂは、嵌合部に対し
てほぼ90度曲げられ、その装着状態においては図
示例の如くPC鋼材用挿通孔３の軸線と平行にの
び、該挿通孔３と同軸的に配設されるシース管な
どと相互干渉することのないように配慮されてい
る。なお、前記補強筋６は、アーム部７ｂ，８ｂ
に対して例えば緊結等の通常手段により固定され
る。 In this embodiment, the reinforcing bars 6 for the fixing part to be buried in the concrete directly below the fixing device 1 are fixed via a pair of attachment bars 7 and 8 to which the neck part 5 of the protruding part 3 is attached. It is attached to the fixture 1 and placed at a predetermined position within the formwork. The mounting bars 7 and 8 each have a pair of fitting portions 7a, 7a and 8a, 8a formed by bending into an arc shape so as to sandwich and fit into the circular neck portion 5, and a reinforcing portion. It is configured to have arm portions 7b and 8b to which the struts 6 are attached. The arm portions 7b and 8b of the mounting bars 7 and 8 are bent approximately 90 degrees with respect to the fitting portion, and in the attached state, they extend parallel to the axis of the insertion hole 3 for PC steel material as shown in the illustrated example, and Care has been taken to prevent mutual interference with the sheath tube etc. disposed coaxially with 3. Note that the reinforcing bars 6 are attached to the arm portions 7b, 8b.
It is fixed by conventional means such as, for example, tightening.
定着部用補強筋をこのような取付構造とした場
合、その取り付け作業がきわめて容易となるうえ
に、取り付け精度も著しく向上する。即ち、取付
筋７，８はそれぞれその嵌合部７ａ，８ａを単に
円形首部５に嵌合させるだけで定着具１に取付け
られるので、この取付筋７，８を基準としてこれ
に定着部用補強筋６を緊結等の手段にて単に取付
ければ良く、その作業がきわめて容易なものとな
る。しかも、このように取付筋は定着具に装着さ
れているので、必然的に定着部用補強筋６の取付
け精度、つまり定着部用補強筋の配設位置の精度
も向上する。 When the fixing section reinforcing bar has such a mounting structure, the mounting work becomes extremely easy, and the mounting accuracy is also significantly improved. That is, since the attachment bars 7 and 8 can be attached to the fixing device 1 by simply fitting their respective fitting portions 7a and 8a into the circular neck portion 5, reinforcement for the fixing portion is applied to the attachment bars 7 and 8 as a reference. It is sufficient to simply attach the struts 6 by means of tightening or the like, which makes the work extremely easy. Furthermore, since the attachment bars are attached to the fixing tool in this way, the accuracy of attaching the fixing section reinforcing bars 6, that is, the accuracy of the arrangement position of the fixing section reinforcing bars 6, is inevitably improved.
第６図は本発明の他の実施例を示すものであ
る。この実施例では、コンクリート内に埋設する
ための定着部用補強筋１０を螺旋状とする場合に
好適な取付け構造例を示したものであつて、その
螺旋状となつた定着部用補強筋１０の一端側に、
それよりも小径でかつ同軸的に延びる螺旋状の取
付筋１１部分を一体に形成すると共に、この取付
筋１１部分を、定着具１の小径筒状部３ａ部分に
外嵌させて取り付ける構造としたものである。 FIG. 6 shows another embodiment of the invention. This embodiment shows an example of a suitable mounting structure when the reinforcing bar 10 for the anchoring part to be buried in concrete has a spiral shape. on one end of the
A structure is adopted in which a spiral attachment strip 11 portion having a diameter smaller than that and extending coaxially is integrally formed, and the attachment strip 11 portion is fitted onto the small diameter cylindrical portion 3a of the fixing tool 1 by being attached to the outside. It is something.
このようにすると、定着部用補強筋１０の取付
作業及び取付精度のいずれをもさらに向上させる
ことができ、かつ低コスト化も図ることができ
る。 In this way, it is possible to further improve both the installation work and the accuracy of the installation of the fixing section reinforcing bar 10, and it is also possible to reduce costs.
「発明の効果」
以上説明したように、本発明にあつては、プレ
ストレスを導入すべきコンクリート構造物の端面
に埋設されて使用されるPC鋼材用定着具の本体
部内面側に突出部を設け、この突出部に、定着具
直下のコンクリート内の埋設するための定着部用
補強筋を、該突出部の周りに嵌合させて装着した
取付筋を介して取り付けた構造としたので、定着
部用補強筋を目的とする所定の位置に容易にしか
も精度良く配設して取り付けることができ、これ
によつて低コスト化さらにはプレストレストコン
クリート構造物ないし製品の品質向上などを図り
得るといつた優れた効果を奏する。"Effects of the Invention" As explained above, in the present invention, a protrusion is provided on the inner surface of the main body of a fixing device for prestressing steel that is used by being buried in the end face of a concrete structure to which prestress is to be introduced. The structure is such that reinforcing bars for the fixing part, which are to be buried in the concrete directly under the fixing device, are attached to this protruding part via mounting bars fitted around the protruding part, so that the fixing It is possible to easily and accurately arrange and attach reinforcing bars at desired locations, thereby reducing costs and improving the quality of prestressed concrete structures and products. It has excellent effects.
第１図ないし第５図は本発明の一実施例を示す
もので、第１図は斜視図、第２図は平面図、第３
図は取付筋を90度回転させた状態の側面図、第４
図は第３図の−線にそう断面図、第５図は取
付筋の斜視図、第６図は本発明の他の実施例を示
す平面図である。
１……定着具、２……本体部、３……突出部、
６，１０……定着部用補強筋、７，８，１１……
取付筋。
1 to 5 show one embodiment of the present invention, in which FIG. 1 is a perspective view, FIG. 2 is a plan view, and FIG.
The figure is a side view with the mounting bar rotated 90 degrees,
The drawings are a cross-sectional view taken along the - line in FIG. 3, FIG. 5 is a perspective view of the mounting reinforcement, and FIG. 6 is a plan view showing another embodiment of the present invention. 1... Fixing tool, 2... Main body part, 3... Protrusion part,
6, 10... Reinforcement bar for anchoring part, 7, 8, 11...
Mounting strip.
Claims (1)
物の端面に埋設されて使用されるPC鋼材用定着
具の本体部内面側に突出部を設け、この突出部
に、定着具直下のコンクリート内に埋設するため
の定着部用補強筋を、該突出部の周りに嵌合させ
て装着した取付筋を介して取り付けてなるPC鋼
材定着部の補強筋取り付け構造。 ２ 前記取付筋と定着部用補強筋とが連続する鉄
筋で構成されていることを特徴とする特許請求の
範囲第１項記載のPC鋼材定着部の補強筋取り付
け構造。[Scope of Claims] 1. A protrusion is provided on the inner surface of the main body of a fixing device for prestressing steel that is used by being buried in the end face of a concrete structure to which prestress is to be introduced, and a protrusion is provided on the inner surface of the main body of the fixing device, and a A reinforcing bar attachment structure for a PC steel fixing part, in which a reinforcing bar for the fixing part to be buried in concrete is attached via a mounting bar fitted around the protruding part. 2. The reinforcing bar attachment structure for a PC steel anchoring part according to claim 1, wherein the attachment bar and the reinforcing bar for the anchoring part are constituted by continuous reinforcing bars.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26979485A JPS62129463A (en) | 1985-11-30 | 1985-11-30 | Reinforcing steel bar mount structure of pc steel material anchoring part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26979485A JPS62129463A (en) | 1985-11-30 | 1985-11-30 | Reinforcing steel bar mount structure of pc steel material anchoring part |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62129463A JPS62129463A (en) | 1987-06-11 |
| JPH0549790B2 true JPH0549790B2 (en) | 1993-07-27 |
Family
ID=17477251
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26979485A Granted JPS62129463A (en) | 1985-11-30 | 1985-11-30 | Reinforcing steel bar mount structure of pc steel material anchoring part |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62129463A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6411225B2 (en) * | 2015-01-16 | 2018-10-24 | 株式会社長谷工コーポレーション | Reinforcing bar material for crack prevention of PC steel wire tension end and reinforcing bar using the same |
-
1985
- 1985-11-30 JP JP26979485A patent/JPS62129463A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62129463A (en) | 1987-06-11 |
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