JPS6078014A - Concrete pile - Google Patents

Concrete pile

Info

Publication number
JPS6078014A
JPS6078014A JP18507683A JP18507683A JPS6078014A JP S6078014 A JPS6078014 A JP S6078014A JP 18507683 A JP18507683 A JP 18507683A JP 18507683 A JP18507683 A JP 18507683A JP S6078014 A JPS6078014 A JP S6078014A
Authority
JP
Japan
Prior art keywords
pile
concrete
section
cross
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.)
Granted
Application number
JP18507683A
Other languages
Japanese (ja)
Other versions
JPS6225813B2 (en
Inventor
Minoru Yamada
実 山田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
KODAMA CONCRETE KOGYO KK
Original Assignee
KODAMA CONCRETE KOGYO KK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by KODAMA CONCRETE KOGYO KK filed Critical KODAMA CONCRETE KOGYO KK
Priority to JP18507683A priority Critical patent/JPS6078014A/en
Publication of JPS6078014A publication Critical patent/JPS6078014A/en
Publication of JPS6225813B2 publication Critical patent/JPS6225813B2/ja
Granted legal-status Critical Current

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/22Piles
    • E02D5/58Prestressed concrete piles

Landscapes

  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Piles And Underground Anchors (AREA)

Abstract

PURPOSE:To obtain a concrete pile having sufficient horizontal bearing capacity by a method in which PC steel materials of a flat cross section are radially set at intervals in the direction of paralling the radial direction of the pile and a tensile force is introduced into the PC steel materials. CONSTITUTION:PC steel materials 2 of a flat cross section are radially set at intervals in the direction of parallizing the radial direction of a pile 1 in the sectional area of the concrete layer 3 of the pile 1. After the concrete layer 3 hardens, a tensile force is introduced into the PC steel materials 2. concrete piles having a high cracking resistance and a high horizontal bearing capacity can thus be obtained.

Description

【発明の詳細な説明】 本発明はコンクリートパイルに関するものである。[Detailed description of the invention] The present invention relates to concrete piles.

従来より知られる構造物用基礎杭としては、大別してコ
ンクリート製のRCパイル、PCパイル、その外鋼管杭
及び鋼管とコンクリートとの複合パイルなどがある。コ
ンクリートパイルのうちRCパイルは製作が容易である
と共に、コンクリートの圧縮力に強いという利点を杭の
支持力として有効に活用できるという理由からさくより
大量に利用されてきた。しかしながらこのRCパイルは
支持力の点で有利である反面的げに弱くコンクリ−1・
の表面にひび割れを生じやすいという欠点がある。勿論
ひび割れが生ずるということは、その部分から座屈を生
じやすくなると共に、地下水の侵入によって内部の筋材
が腐食し、やがては杭としての機能を失うことになる。
Conventionally known foundation piles for structures can be broadly classified into concrete RC piles, PC piles, steel pipe piles, and composite piles of steel pipes and concrete. Among concrete piles, RC piles have been used in large quantities because they are easy to manufacture and the advantage of concrete's strong compressive force can be effectively utilized as the supporting force of the pile. However, although this RC pile is advantageous in terms of supporting capacity, it is weak and concrete
The disadvantage is that the surface is prone to cracking. Of course, when cracks occur, buckling becomes more likely to occur in those areas, and the internal reinforcement corrodes due to the intrusion of groundwater, eventually causing the pile to lose its function.

このようなRCパイルのひび割れが生じやすいという欠
点を補うために、鋼線の緊張力によりコンクリートにプ
レストレスを与えるPCパイルがその後提唱されるに至
ったが、PCパイルはひび割れを生じにくいという利点
を有する反面、コンクリートが鋼線による緊張力を与え
られていているだけでいわゆる粘性力に欠けるために、
所定以上の大きい曲げモーメントが作用するとPCfi
線が破断して、プレストレスを与えた意味がなくなると
いう問題点がある。
In order to compensate for the disadvantage that RC piles tend to crack easily, PC piles, which apply prestress to concrete using the tension of steel wires, were later proposed, but the advantage of PC piles is that they are less prone to cracking. On the other hand, concrete lacks so-called viscous force because it is only given tension by steel wires,
When a large bending moment greater than the specified value is applied, PCfi
There is a problem in that the wire breaks and the prestressing is meaningless.

本発明は上記の如きRCパイル及びPCパイルの問題点
を解消できる新しい型式のコンクリートパイルの提供を
目的としたものである。
The object of the present invention is to provide a new type of concrete pile that can solve the problems of RC piles and PC piles as described above.

この発明に係るコンクリートパイルは 基本的にはPC
パイルの型式によるが、PC鋼材として断面が平鋼形の
PCfl材を用いて、該平鋼形のPCl3材か緊張力を
与えられて単にコンクリートの引っ張り力をj1j償す
るという意味をもつのみならず、パイルとしての粘性を
充分に発揮させるためのコンクリート補強筋材としても
役立たせるように構成することにより、PCパイルであ
りながらパイルの機能として要求される水平耐力か充分
に得られるようにした新しい形式のコンクリートパイル
の提供を目的としたものである。
The concrete pile according to this invention is basically PC
It depends on the type of pile, but if a PCfl material with a flat steel cross section is used as the PC steel material, and tension is applied to the flat steel PCl3 material, it simply compensates for the tensile force of the concrete. First, by configuring it so that it can also be used as a concrete reinforcing reinforcing material to fully demonstrate its viscosity as a pile, it is possible to obtain sufficient horizontal strength required as a pile function even though it is a PC pile. The purpose is to provide a new type of concrete pile.

次に本発明のコンクリートパイルを図示の実施例により
説明する。第1図は抗体断面の構成を示す断面図であり
、コンクリ−j・をもって遠心成形した杭体lのコンク
リート層3断面内に、多数の断面を平鋼形に形成したP
C鋼材2が杭軸方向に!0っだ筋材として所定間隔毎に
配列されている。
Next, the concrete pile of the present invention will be explained with reference to illustrated embodiments. Figure 1 is a cross-sectional view showing the structure of the cross section of the antibody, in which a large number of cross sections are formed into flat steel shapes within the cross section of the concrete layer 3 of the pile body L centrifugally formed with concrete J.
C steel material 2 is in the direction of the pile axis! They are arranged at predetermined intervals as reinforcing bars.

これらのPCfi材2は、従来のプレストレスコンクリ
ート用のPC鋼棒と同様キルI”fflを熱間圧延して
ストレフチングなとの方法により成型されるが、断面を
板幅Wが板厚Hよりも大きい平311形に成型した点に
おいて従来の丸棒形と異るものの、降伏点荷重、引張荷
重、等の種/(の機械的性質においては従来のPC鋼材
と変りはない。なお断面形状としては第3図に示すよう
に、底端4の板厚が頂端5の板厚に比較して肉厚である
ような台形断面のものであってもよい。
These PCfi materials 2 are formed by the method of hot rolling and strefching similar to conventional PC steel rods for prestressed concrete. Although it differs from conventional round bar shapes in that it is molded into a larger flat 311 shape, its mechanical properties such as yield point load and tensile load are no different from conventional PC steel materials. Alternatively, as shown in FIG. 3, it may have a trapezoidal cross section in which the bottom end 4 is thicker than the top end 5.

これらのPC鋼材2は、いずれも成型前の工程において
+rlツ端12が杭の両端を構成する固定端板6に対し
て溶接により固定されるか、これらのPC鋼材2は、夫
々コンクリ−!・層3断面内において板幅Wを形成する
平面が杭断面の半径方向と平行な向き、即ち全体的にみ
て杭の中心に対して成用線状になるように配列されてい
る。なお第3図に示すPC鋼材2ようにtIイ端の板厚
を異ならしめた場合には、板厚の大きい底端4がコンク
リート層3の外周側に位置する向きで配列されることが
望ましい。また第3図に示すように夫々のPC鋼材2に
おける底端4の先端面は、遠心力によりコンクリート層
3が締固められる際に杭断面の中心からみて底端4の裏
側にコンクリートの未充填部分が生しないようにするた
めに円弧状に形成しておくことが望ましい。
These PC steel materials 2 are either fixed by welding so that the +rl ends 12 are fixed to the fixed end plates 6 constituting both ends of the pile in the process before forming, or these PC steel materials 2 are respectively fixed to concrete! - The planes forming the plate width W in the layer 3 cross section are arranged in a direction parallel to the radial direction of the pile cross section, that is, in a general line shape with respect to the center of the pile as a whole. In addition, when the thickness of the plate at the tI edge is made different as in the case of the PC steel material 2 shown in FIG. . In addition, as shown in Fig. 3, when the concrete layer 3 is compacted by centrifugal force, the back side of the bottom end 4 is not filled with concrete when the concrete layer 3 is compacted by centrifugal force. It is preferable to form it in an arc shape to prevent the part from growing.

これらのPCfi材2か前記のように夫々杭の両端にお
けるr、!、I定嬬板6によって放射形状配列状態を維
持するように互いに固定されたのち、PCIC2O4側
には螺旋筋7が施される。
As mentioned above, these PCfi materials 2 have r at both ends of the pile, respectively! , and are fixed to each other so as to maintain a radial arrangement state by means of an I insulating plate 6, and then a spiral reinforcement 7 is provided on the PCIC2O4 side.

PC鋼材2に対する緊張力の付与は、第4図に示すよう
に前記固定端板6における各pc鋼材2溶接部間に開設
した係止孔8に夫々緊張ポルト9を装着し、これらの緊
張ボルト9を図示外のジヤツキにより引っ張ることによ
って行はれる。
To apply tension to the PC steel material 2, as shown in FIG. This is done by pulling 9 with a jack (not shown).

本発明に係るコンクリートパイルは、上記の如くコンク
リ−I・杭体1のコンクリート層3断面内に多数の断面
を平鋼形もしくは断面を台形としたPC鋼材2を配列さ
せてこれらPC#4材2に緊張力を与えたので、コンク
リート杭体1はコンクリート層3の硬化後においてこれ
らPC鋼材2の緊4<力が伝達されることによって、ひ
び割れに対して強度のあるPCパイル本来の機能を発揮
することかできる。
The concrete pile according to the present invention is manufactured by arranging a large number of PC steel materials 2 each having a flat steel cross section or a trapezoidal cross section within the cross section of the concrete layer 3 of the concrete I/pile body 1 as described above. After the concrete layer 3 hardens, the tension force of these PC steel members 2 is transmitted to the concrete pile body 1, so that the concrete pile body 1 retains its original function of being strong against cracks. I can do what I can.

また夫々のPC鋼材2は断面が従来の丸棒形と異った平
鋼形もしくは台形であることと、該PC鋼材2をコンク
リート層3断面内において板@Wを形成する平面が杭断
面の半径方向と平行な向きで互いに間隔を置いて放射線
状に配列されるようにしたので、f31図に示すように
矢印の方向から水平力が作用した場合に、水平力の方向
と平行な向きにある部分のPC鋼材2a及び2bが特に
その水31i−力に対して強靭な抵抗力を発揮すること
となり、全てのPC鋼材が杭全体に対して強力な曲げ強
度と弾性を与えることができる。
In addition, the cross section of each PC steel material 2 is a flat steel shape or a trapezoid, which is different from the conventional round bar shape, and the plane forming the plate @W in the cross section of the concrete layer 3 is the same as the cross section of the pile. Since they are arranged radially parallel to the radial direction and spaced apart from each other, when a horizontal force is applied from the direction of the arrow as shown in figure f31, the elements are arranged in a direction parallel to the horizontal force direction. Certain portions of the PC steel materials 2a and 2b exhibit particularly strong resistance to the water 31i-force, and all of the PC steel materials can provide strong bending strength and elasticity to the entire pile.

なお前記PC鋼材2を、第3図の実施例の如く台形とし
て厚肉の底端4をコンクリート層3の外周側に位置させ
た場合には、断面としてみた場合の中心軸か中心線り上
の外側、即ちコンクリート層3の外周側に位置すること
と、更には両側面が夫々中心線りに対して等角度のテー
パー面であるために中心線りに平行な曲げに対して断面
として強度を有することなどの理由により、前記水平力
に対しては著しく強靭な抵抗力を発揮することとなる。
If the PC steel material 2 is shaped like a trapezoid and the thick bottom end 4 is located on the outer circumferential side of the concrete layer 3 as in the embodiment shown in FIG. Because it is located on the outside of the concrete layer 3, that is, on the outer circumferential side of the concrete layer 3, and because both sides are tapered at equal angles to the center line, the cross-sectional strength against bending parallel to the center line is high. Because of this, it exhibits an extremely strong resistance against the horizontal force.

以−1−に述へたように本発明のパイルでは、平鋼形P
Cfi材を使用することによってコンクリート抗体にひ
ひ割れに強いプレストレス効果を与えることができるの
みならず、該PC鋼材の選択的配列により抗体に本来の
PC杭では得ることのできなかった抗体の粘性を確実に
伺与することができるので、結果としてひび割れに強く
しかも水平耐力の充分強力なコンクリートパイルとする
ことができる。しかもPC鋼材か軸鉄筋としても作用す
るので圧縮力に強度のあるRC杭の利点をも兼ねfff
iえることもでき、極めて合理的なコンクリートパイル
を提供できるという効果を有するものである。
As mentioned above-1-, in the pile of the present invention, the flat steel shape P
By using Cfi material, it is possible not only to give the concrete pile a prestressing effect that is strong against cracking, but also because of the selective arrangement of the PC steel material, the concrete pile has a viscosity that could not be obtained with the original PC pile. As a result, it is possible to obtain a concrete pile that is resistant to cracking and has sufficient horizontal strength. Moreover, since it acts as a PC steel material or shaft reinforcing bar, it also has the advantage of RC piles that are strong against compressive forcesfff
This has the effect of providing an extremely rational concrete pile.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は本発明に係るコンクリートパイルの杭断面の構
成を示す断面図、第2図は第1図のII −11線にお
ける断面図、第3図は他の実施例における杭断面の構成
を示す断面図、第4図はPCfi材に緊張力を付与する
ための実施例を示、す部分断面図である。 図において、 ■=抗体、2:PC鋼材、3:コンクリート層、4:銅
材底端、5:鋼材頂端、6:固定端板、7:螺旋筋、8
:係止孔、9:緊張ボルト、特許出願人 児玉コンクリ
ート工業株式会社代理人 ゴ「埋土 武 1)賢 市
Fig. 1 is a cross-sectional view showing the structure of the pile cross-section of the concrete pile according to the present invention, Fig. 2 is a cross-sectional view taken along line II-11 in Fig. 1, and Fig. 3 is a cross-sectional view showing the structure of the pile cross-section in another embodiment. FIG. 4 is a partial cross-sectional view showing an embodiment for imparting tension to the PCfi material. In the figure, ■=Antibody, 2: PC steel material, 3: Concrete layer, 4: Bottom end of copper material, 5: Top end of steel material, 6: Fixed end plate, 7: Spiral bar, 8
: Locking hole, 9: Tension bolt, Patent applicant: Kodama Concrete Industry Co., Ltd. Agent, Takeshi Go 1) Kenichi

Claims (1)

【特許請求の範囲】 1、コンクリート抗体断面内における杭軸方向に、断面
を平鋼形としたPC鋼材が杭−両端の固定端板によって
夫々の鋼材平面が杭断面の半径方向と平行する向きで互
いに間隔を置いて放射状に配列され、該PC#v4材を
抗体コンクリートの補強筋材とすると共に、該PC鋼材
に引張力を導入することにより抗体コンクリートにプレ
ストレスが付与されていることを特徴としたコンクリー
トパイル。 2、PCwI材が断面台形である特許請求の範囲
[Claims] 1. In the axial direction of the pile in the cross section of the concrete body, the PC steel material with a flat steel cross section is oriented so that the plane of each steel material is parallel to the radial direction of the pile cross section by the fixed end plates at both ends of the pile. The PC#v4 materials are arranged radially at intervals from each other and are used as reinforcing bars for the antibody concrete, and prestress is applied to the antibody concrete by introducing tensile force into the PC steel materials. The characteristic concrete pile. 2. Claims in which the PCwI material has a trapezoidal cross section
JP18507683A 1983-10-05 1983-10-05 Concrete pile Granted JPS6078014A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18507683A JPS6078014A (en) 1983-10-05 1983-10-05 Concrete pile

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18507683A JPS6078014A (en) 1983-10-05 1983-10-05 Concrete pile

Publications (2)

Publication Number Publication Date
JPS6078014A true JPS6078014A (en) 1985-05-02
JPS6225813B2 JPS6225813B2 (en) 1987-06-04

Family

ID=16164393

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18507683A Granted JPS6078014A (en) 1983-10-05 1983-10-05 Concrete pile

Country Status (1)

Country Link
JP (1) JPS6078014A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6123485A (en) * 1998-02-03 2000-09-26 University Of Central Florida Pre-stressed FRP-concrete composite structural members
JP2006336217A (en) * 2005-05-31 2006-12-14 Shimizu Corp Existing concrete pile and axial shear reinforcing structure inside pile head

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102651758B1 (en) * 2022-10-05 2024-03-26 박봉근 Head Reinforcing Structure of PHC Pile with shear member to improvement of bending moment and Improve Bending Moment and Distribute Uniform Normal Load

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5249247A (en) * 1975-10-17 1977-04-20 Nippon Oil & Fats Co Ltd Vertical type continuous powder coating booth

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5249247A (en) * 1975-10-17 1977-04-20 Nippon Oil & Fats Co Ltd Vertical type continuous powder coating booth

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6123485A (en) * 1998-02-03 2000-09-26 University Of Central Florida Pre-stressed FRP-concrete composite structural members
JP2006336217A (en) * 2005-05-31 2006-12-14 Shimizu Corp Existing concrete pile and axial shear reinforcing structure inside pile head

Also Published As

Publication number Publication date
JPS6225813B2 (en) 1987-06-04

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