JPH0654008B2 - PC concrete pile fittings - Google Patents
PC concrete pile fittingsInfo
- Publication number
- JPH0654008B2 JPH0654008B2 JP62183572A JP18357287A JPH0654008B2 JP H0654008 B2 JPH0654008 B2 JP H0654008B2 JP 62183572 A JP62183572 A JP 62183572A JP 18357287 A JP18357287 A JP 18357287A JP H0654008 B2 JPH0654008 B2 JP H0654008B2
- Authority
- JP
- Japan
- Prior art keywords
- bottom plate
- concrete pile
- shaped
- ring
- hollow
- 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
- Piles And Underground Anchors (AREA)
- Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は中空コンクリートパイル用の継手金具に関する
ものである。TECHNICAL FIELD The present invention relates to a joint fitting for hollow concrete piles.
既製のＰＣコンクリートパイルは、通常、１本の長さ１
０ｍ〜１５ｍに構成され、これよりも長尺のパイルを必
要とするときは継手金具によって２本以上の既製ＰＣコ
ンクリートパイルを接続して用いられる。Off-the-shelf PC concrete piles are usually one length 1
When the pile is configured to have a length of 0 to 15 m and a length longer than this is required, two or more ready-made PC concrete piles are connected to each other by a joint fitting and used.
第２図は従来の継手金具１を冠着したコンクリートパイ
ル２の１例を示す断面図である。ＰＣはＰＣ鋼線でその
端部は継手金具１に取り付けてあり、その取付点は継手
金具１の底面の周の内側に、ほぼ円形に配列されてい
る。FIG. 2 is a cross-sectional view showing an example of a concrete pile 2 to which a conventional joint fitting 1 is attached. The PC is a PC steel wire, the end of which is attached to the joint metal fitting 1, and the attachment points are arranged in a substantially circular shape on the inner side of the circumference of the bottom surface of the joint metal fitting 1.
第３図は上記の継手金具１の拡大断面を示す。この継手
金具１は、中心孔を設けた座金状の底板１ａと円筒状の
リング１ｂとを別体に構成し、溶接して連結してある。
１ｃは溶接のビードである。FIG. 3 shows an enlarged cross section of the joint fitting 1. In this joint fitting 1, a washer-shaped bottom plate 1a having a central hole and a cylindrical ring 1b are separately configured and welded and connected.
1c is a weld bead.
上記のリング１ｂには２条の円周溝状の凹部１ｂ-1，１
ｂ-2を設けてある。この円周溝状凹部１ｂ-1，１ｂ-2を
設けておくと、凹部の内側面に突条が形成されてコンク
リートパイルに対する結合が強固になる。The ring 1b has two circumferential groove-shaped recesses 1b -1 , 1,
b- 2 is provided. If the circumferential groove-shaped recesses 1b- 1 and 1b- 2 are provided, a ridge is formed on the inner surface of the recess to strengthen the connection to the concrete pile.
１ａ-1は、コンクリート打設時ＰＣ鋼線ＰＣにテンショ
ンを与えるプーラ（図示せず）を取りつけるためのメネ
ジ孔、１ａ-2は同じく円錐座面である。Reference numeral 1a- 1 is a female screw hole for attaching a puller (not shown) that gives tension to the PC steel wire PC when pouring concrete, and 1a- 2 is also a conical seat surface.
材料コスト及び加工コストを低減するため、前記の継手
金具は所定の強度を満たす範囲内で、なるべく薄く構成
することが望ましい。しかし、コンクリートパイル２を
第４図に示すように継ぎ合わせて、継手金具１同志を溶
接した状態において、継手金具１の両側を支点３，３′
で支えて試験荷重Ｐ1を加えたときの破断モーメント
は、継手金具の無い個所を支点４，４′で支えて試験荷
重Ｐ2を加えたときの破断モーメントよりも小であって
はならないとされている（業界内部規定）ので、前記の
底板１ａは相応の厚さを有するように構成しなければな
らない。In order to reduce the material cost and the processing cost, it is desirable that the joint metal fitting be made as thin as possible within a range satisfying a predetermined strength. However, when the concrete piles 2 are spliced together as shown in FIG. 4 and the joint fittings 1 are welded to each other, both sides of the joint fitting 1 are fulcrums 3, 3 '.
The breaking moment when the test load P 1 is applied by supporting the joint must not be smaller than the breaking moment when the test load P 2 is applied by supporting the parts without joint fittings at the fulcrums 4, 4 ′. Since it is defined in the industry, the bottom plate 1a must be constructed to have a corresponding thickness.
第５図は、なるべく軽量に、しかも所定強度を有するよ
うに構成された従来技術に係る底板１ａ′の断面を描い
た説明図である。FIG. 5 is an explanatory view showing a cross section of a bottom plate 1a 'according to the prior art which is configured to be as lightweight as possible and to have a predetermined strength.
１ａ-3は溶接用の開先である。1a- 3 is a groove for welding.
しかし、第５図の構成を用いても、一つには底板自身の
強度保持の為、一つには充分の開先１ａ-3の寸法を得る
為（即ち溶接部強度保持の為）、肉厚寸法ｔの減少は限
界が有る。更には、メネジ孔１ａ-1に有効長さを持たせ
る為、及び、円錐座面１ａ-2に所要の強度を持たせる為
にも、前記肉厚寸法ｔの減少に限界が有る。However, even if the configuration of FIG. 5 is used, one is to maintain the strength of the bottom plate itself, and one is to obtain a sufficient size of the groove 1a -3 (that is, to maintain the strength of the welded portion). There is a limit to the reduction of the wall thickness dimension t. Further, there is a limit to the reduction of the wall thickness t in order to give the female screw hole 1a- 1 an effective length and to give the conical seat surface 1a- 2 a required strength.
本発明は上述の事情に鑑みて為されたもので、その目的
とするところは、充分な底板強度と、充分な溶接部強度
と、充分なＰＣ鋼線取付強度とを保持することができ、
しかも板厚を格段に減少せしめ得るように底板形状を改
良したＰＣコンクリートパイル用継手金具を提供しよう
とするものである。The present invention has been made in view of the above circumstances, and an object thereof is to be able to maintain sufficient bottom plate strength, sufficient welded portion strength, and sufficient PC steel wire attachment strength,
Moreover, it is an object of the present invention to provide a joint fitting for PC concrete pile in which the shape of the bottom plate is improved so that the plate thickness can be remarkably reduced.
上記の目的を達成するため、本発明の継手金具は、座金
状に中心孔を設けた底板を、円筒状リングに溶接固着し
た構造の、中空ＰＣコンクリートパイル用継手金具に適
用され、 （ａ）前記底板は、パイル中心線を含む面による断面が
Ｌ字状をなすようにプレス加工されていて、上記Ｌ字状
断面の１辺をなす底板周囲部分が折り上げられて短筒状
部分を構成しており、 （ｂ）上記短筒状部分の外径は中空ＰＣコンクリートパ
イルの外径と等しく、該筒状部分の長さ寸法（Ｌ′）は
底板の厚さ寸法（Ｔ）の約２倍であり、 （ｃ）前記座金状中心孔を設けた底板の中心孔の内径が
中空ＰＣコンクリートパイルの内径に等しく、前記円筒
状リングの厚さ寸法（ｔ1）は底板の厚さ寸法（Ｔ）に
比して格段に薄く、かつ、該円筒状リングは底板の短筒
状部分と突き合わせ溶接されており、 （ｄ）前記底板のＬ字状断面の水平な底辺に相当する面
に、複数の輪状の肉寄せ厚肉部がプレス成形されるとと
もに、該輪状厚肉部の中心にＰＣ鋼線緊張用のメネジ孔
およびＰＣ鋼線係着用の円錐面座が設けられていること
を特徴とする。In order to achieve the above object, the joint fitting of the present invention is applied to a joint fitting for hollow PC concrete pile having a structure in which a bottom plate having a washer-like center hole is welded and fixed to a cylindrical ring. The bottom plate is press-worked so that the cross section along the plane including the pile center line is L-shaped, and the peripheral portion of the bottom plate forming one side of the L-shaped cross section is folded up to form a short tubular portion. (B) The outer diameter of the short tubular portion is equal to the outer diameter of the hollow PC concrete pile, and the length dimension (L ') of the tubular portion is about 2 of the thickness dimension (T) of the bottom plate. (C) The inner diameter of the central hole of the bottom plate provided with the washer-shaped central hole is equal to the inner diameter of the hollow PC concrete pile, and the thickness dimension (t 1 ) of the cylindrical ring is the thickness dimension of the bottom plate ( It is much thinner than T), and the cylindrical ring is a short cylinder of the bottom plate. (D) a plurality of ring-shaped thickened thick portions are press-molded on the surface corresponding to the horizontal bottom of the L-shaped cross section of the bottom plate, and It is characterized in that a female screw hole for tensioning a PC steel wire and a conical seat for wearing a PC steel wire are provided at the center.
上記のように構成した継手金具は、前記の短筒状部分が
補強リブとして作用し、板厚寸法に比して大きい剛性を
示す。更に、プレス加工によって生じる曲げ部分の角の
丸味（いわゆるアール）が、溶接開先としての機能を果
たすので、板厚寸法に比して充分な開先が得られ、従っ
て、充分な溶接強度を発揮せしめ得る。In the joint fitting configured as described above, the short tubular portion acts as a reinforcing rib, and exhibits high rigidity as compared with the plate thickness dimension. Furthermore, the roundness of the corners of the bent portion (so-called radius) generated by press working functions as a welding groove, so that a sufficient groove can be obtained compared to the plate thickness dimension, and therefore sufficient welding strength can be obtained. It can be demonstrated.
更に輪状の肉寄せ厚肉部の中心にメネジ孔や円錐面座を
設けたので、該部のＰＣ鋼線取付強度が大きい（詳しく
は、底板の厚さを比して取付強度が大きい）。従って一
定の取付強度を得るための底板の厚さ寸法を減少し得
る。本発明はこのようにして底板の厚さ寸法の減少を可
能ならしめて、継手金具のプレス成形一体構成を可能な
らしめたものである。Further, since the female screw hole and the conical seat are provided at the center of the ring-shaped thickened portion, the PC steel wire attachment strength of the portion is large (specifically, the attachment strength is large compared to the thickness of the bottom plate). Therefore, it is possible to reduce the thickness dimension of the bottom plate for obtaining a constant mounting strength. The present invention makes it possible to reduce the thickness of the bottom plate in this manner, thereby enabling the press-fitting integral structure of the joint fitting.
第１図は本発明に係る継手金具の１実施例の断面を模式
的に描いた説明図である。FIG. 1 is an explanatory view schematically showing a cross section of one embodiment of a joint fitting according to the present invention.
１ｃは本発明を適用して構成した底板であって、中心孔
を有する座金状の鋼板をプレス加工して、その断面がＬ
字状をなすように（詳しくは、コンクリートパイル２の
中心線Ｙ−Ｙ′を含む面による断面がＬ字状をなすよう
に）成形し、その外周部に短筒状の折上げ縁１ｃ-1を設
けてある。Reference numeral 1c is a bottom plate constituted by applying the present invention, and a washer-shaped steel plate having a central hole is pressed to have a cross section of L
(Specifically, as a section along plane including the concrete center line Y-Y of the pile 2 'forms an L-shape) so form a shaped molded, short cylindrical folding up the edge 1c on the outer periphery - 1 is provided.
上記短筒状の折上げ縁１ｃ-1の長さ寸法Ｌ′は、底板の
厚さ寸法Ｔの約２倍に成形されている。この寸法Ｌ′が
２Ｔに比して著しく小さいと充分な強度が期待できな
い。The length dimension L'of the short tubular folding edge 1c- 1 is formed to be about twice the thickness dimension T of the bottom plate. If this dimension L'is significantly smaller than 2T, sufficient strength cannot be expected.
また、２Ｔに比して著しく大きくするとプレス成形が困
難であるに拘らず強度増加が僅少なので不経済である。Further, if it is remarkably larger than 2T, it is uneconomical because the increase in strength is slight although the press molding is difficult.
上記の短筒状の折上げ縁１ｃ-1にリング１ｂを対向せし
めて突き合わせ溶接する。上記のリング１ｂの厚さ寸法
ｔ1は底板１ｃの厚さ寸法Ｔに比して格段に薄くなって
いる。ここに格段に薄いとは、計器を用いるまでもなく
目視判断し得る程度に薄いことをいう。The ring 1b is made to face the folded-up edge 1c- 1 of the above-mentioned short cylindrical shape and butt-welded. The thickness t 1 of the ring 1b is much smaller than the thickness T of the bottom plate 1c. Here, "remarkably thin" means that it is thin enough to be visually judged without using a meter.
曲げ加工部には曲率半径ｒの丸味が自然に生じている。
１ｃ-3は底板１ｃとリング１ｂとの溶接部であって、図
示の如く突き合わせ溶接してある。A roundness with a radius of curvature r naturally occurs in the bent portion.
Reference numeral 1c- 3 is a welded portion between the bottom plate 1c and the ring 1b, which is butt welded as shown in the drawing.
本例の底板１ｃの内周１ｃ-2の径寸法は、コンクリート
パイル２の内周２ａの径寸法と等しく構成してある。必
要な強度を持たせると共に取扱いを容易ならしめ、か
つ、雨水が溜まるなどの不具合を防止したものである。The diameter of the inner circumference 1c -2 of the bottom plate 1c of this example is equal to the diameter of the inner circumference 2a of the concrete pile 2. It has the necessary strength, is easy to handle, and prevents problems such as rainwater accumulation.
仮想線で示したように、もう１本のコンクリートパイル
２′に取り付けられた底板１ｃ′を前記底板１ｃに対向
させると、前述のプレス加工による曲率半径ｒの部分が
開先を形成するので、充分な強度を持たせて溶接施工す
ることが出来る。As shown by the phantom line, when the bottom plate 1c 'attached to another concrete pile 2'is made to face the bottom plate 1c, the portion having the radius of curvature r by the press working forms the groove, Welding can be performed with sufficient strength.
また、上記の底板１ｃは、平面板的な座金形状でなく、
その外周に短筒状部１ｃ-1が一体に連設された構造であ
るため剛性が大きい。１ａ-1は、コンクリートを打設す
る際に、ＰＣ鋼線にテンションを与えるプーラ（図示せ
ず）を取り付けるためのメネジ孔、１ａ-2はＰＣ鋼線Ｐ
Ｃを取り付けるための円錐座面である。The bottom plate 1c is not a flat plate washer shape,
Since the short tubular portion 1c -1 is integrally connected to the outer periphery of the structure, the rigidity is high. 1a -1 is a female screw hole for attaching a puller (not shown) that gives tension to the PC steel wire when pouring concrete, and 1a -2 is the PC steel wire P
It is a conical seat surface for attaching C.
従来例（第３図，第５図）においては、平板状の底板１
ａ，１ａ′にメネジ孔１ａ-1，円錐座面１ａ-2が設けら
れていたが、本例（第１図）においては、メネジ孔１ａ
-1，円錐座面１ａ-2付近が厚肉となっている。これは第
６図に示すように、ダイス７を底板１ａ′に当てがって
おいて円柱状のポンチ８でプレスし、押圧された部分に
凹み１ａ−を形成するとともに、その周囲に輪状の盛
り上がりを形成せしめて厚肉部１ａ-mを構成したもので
あって、上記の凹み１ａ−と同心に円錐座面１ａ-2を
削成すと第７図の如くになる。In the conventional example (FIGS. 3 and 5), a flat bottom plate 1
Although the female screw holes 1a -1 and the conical seat surface 1a -2 are provided in a and 1a ', in the present example (Fig. 1), the female screw holes 1a -1 are formed.
-1 , and the area near the conical seat surface 1a -2 is thick. As shown in FIG. 6, the die 7 is applied to the bottom plate 1a 'and pressed by a cylindrical punch 8 to form a depression 1a- in the pressed portion, and a ring-like shape around the depression. The thick portion 1a- m is formed by forming a bulge, and the conical seat surface 1a- 2 is formed concentrically with the recess 1a- as shown in FIG.
６はＰＣ鋼線ＰＣの１端に設けた傘状の大径部、６ａは
円錐面である。９は、前記円錐座面１ａ-2を含む８の字
孔（別名ダルマ孔）である。6 is an umbrella-shaped large-diameter portion provided at one end of the PC steel wire PC, and 6a is a conical surface. Reference numeral 9 is an 8-shaped hole (also called a dharma hole) including the conical seat surface 1a -2 .
図示を省略するが、同様にして凹み１ａ−を切削して
メネジ孔１ａ-1を設ける。Although not shown, the recess 1a - is similarly cut to form the female screw hole 1a- 1 .
以上詳述したように本発明を適用すると、継手金具に充
分な剛性と、充分なＰＣ鋼線取付強度と、充分な溶接強
度とを確保しつつ、その底板部分の厚さ寸法を格段に減
少せしめることが出来るという優れた実用的効果を奏
し、コンクリートパイルの軽量化，低価格化に貢献する
ところ多大である。As described in detail above, when the present invention is applied, the thickness of the bottom plate portion is remarkably reduced while ensuring sufficient rigidity, sufficient PC steel wire mounting strength, and sufficient welding strength for the joint fitting. It has an excellent practical effect that it can be pressed and contributes to the weight reduction and cost reduction of concrete piles.
第１図は本発明の１実施例を模式化して描いた断面図で
ある。 第２図及び第３図は従来のコンクリートパイル継手金具
の説明図、第４図はコンクリートパイルの強度テストの
説明図である。 第５図は従来技術に係る継手金具における底板の説明図
である。 第６図は前記実施例における輪状厚肉部の構成方法の説
明図、第７図は同じく円錐座面付近の斜視図である。 １……継手金具、１ａ，１ａ′……底板、１ａ-1……開
先、１ａ−……凹み、１ａ-m……肉寄せ厚肉部、１ｂ
……リング、１ｃ……底板、１ｃ-1……外周の短筒状
部、１ｃ-3……溶接部、２，２′……コンクリートパイ
ル、３，３′，４，４′……支点。FIG. 1 is a sectional view schematically showing one embodiment of the present invention. 2 and 3 are explanatory diagrams of a conventional concrete pile joint fitting, and FIG. 4 is an explanatory diagram of a concrete pile strength test. FIG. 5 is an explanatory view of a bottom plate of a joint fitting according to the related art. FIG. 6 is an explanatory view of a method of forming the ring-shaped thick portion in the above embodiment, and FIG. 7 is a perspective view of the vicinity of the conical seat surface. 1 ... Fitting metal fitting, 1a, 1a '... Bottom plate, 1a- 1 ... Groove, 1a -... Recess, 1a- m ..
...... Ring, 1c ...... Bottom plate, 1c -1 ...... Short-cylindrical part on the outer periphery, 1c -3 ...... Welded part, 2,2 '...... Concrete pile, 3,3', 4,4 '...... fulcrum .
Claims (1)
リングに溶接固着した構造の、中空ＰＣコンクリートパ
イル用継手金具において、 （ａ）前記底板は、パイル中心線を含む面による断面が
Ｌ字状をなすようにプレス加工されていて、上記Ｌ字状
断面の１辺をなす底板周囲部分が折り上げられて短筒状
部分を構成しており、 （ｂ）上記短筒状部分の外径は中空ＰＣコンクリートパ
イルの外径と等しく、該筒状部分の長さ寸法（Ｌ′）は
底板の厚さ寸法（Ｔ）の約２倍であり、 （ｃ）前記座金状中心孔を設けた底板の中心孔の内径が
中空ＰＣコンクリートパイルの内径に等しく、前記円筒
状リングの厚さ寸法（ｔ1）は底板の厚さ寸法（Ｔ）に
比して格段に薄く、かつ、該円筒状リングは底板の短筒
状部分と突き合わせ溶接されており、 （ｄ）前記底板のＬ字状断面の水平な底辺に相当する面
に、複数の輪状の肉寄せ厚肉部がプレス成形されるとと
もに、該輪状厚肉部の中心にＰＣ鋼線緊張用のメネジ孔
およびＰＣ鋼線係着用の円錐面座が設けられていること
を特徴とする、中空コンクリートパイル継手金具。1. A hollow PC concrete pile joint metal fitting having a structure in which a bottom plate having a washer-like center hole is welded and fixed to a cylindrical ring, wherein: (a) the bottom plate is a surface including a pile center line. The cross-section is pressed so as to form an L-shape, and the peripheral portion of the bottom plate that forms one side of the L-shaped cross-section is folded up to form a short tubular portion. (B) The short tubular shape The outer diameter of the portion is equal to the outer diameter of the hollow PC concrete pile, and the length dimension (L ') of the tubular portion is about twice the thickness dimension (T) of the bottom plate. (C) The washer-shaped center The inner diameter of the central hole of the bottom plate provided with holes is equal to the inner diameter of the hollow PC concrete pile, and the thickness dimension (t 1 ) of the cylindrical ring is significantly smaller than the thickness dimension (T) of the bottom plate, and , The cylindrical ring is butt-welded with the short cylindrical portion of the bottom plate, (D) A plurality of ring-shaped thickened thick portions are press-molded on the surface corresponding to the horizontal bottom of the L-shaped cross section of the bottom plate, and PC steel wire tension is provided at the center of the ring-shaped thickened portions. A hollow concrete pile joint fitting, characterized in that it is provided with a female screw hole and a conical seat for wearing a PC steel wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62183572A JPH0654008B2 (en) | 1987-07-24 | 1987-07-24 | PC concrete pile fittings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62183572A JPH0654008B2 (en) | 1987-07-24 | 1987-07-24 | PC concrete pile fittings |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6429519A JPS6429519A (en) | 1989-01-31 |
| JPH0654008B2 true JPH0654008B2 (en) | 1994-07-20 |
Family
ID=16138154
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62183572A Expired - Lifetime JPH0654008B2 (en) | 1987-07-24 | 1987-07-24 | PC concrete pile fittings |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0654008B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4753136B2 (en) * | 2005-11-17 | 2011-08-24 | 三谷セキサン株式会社 | Pile connection structure, PC steel bar |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61102639U (en) * | 1984-12-12 | 1986-06-30 | ||
| JPS6241817A (en) * | 1985-08-13 | 1987-02-23 | Santeitsuku:Kk | Forming method for fixing spot of pc steel wire on end plate for concrete pile |
-
1987
- 1987-07-24 JP JP62183572A patent/JPH0654008B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6429519A (en) | 1989-01-31 |
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