EP0370396B1 - Pieux de support de charge en béton armé à plusieurs branches et base élargie, et moyens pour former le pieu - Google Patents

Pieux de support de charge en béton armé à plusieurs branches et base élargie, et moyens pour former le pieu Download PDF

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Publication number
EP0370396B1
EP0370396B1 EP19890121260 EP89121260A EP0370396B1 EP 0370396 B1 EP0370396 B1 EP 0370396B1 EP 19890121260 EP19890121260 EP 19890121260 EP 89121260 A EP89121260 A EP 89121260A EP 0370396 B1 EP0370396 B1 EP 0370396B1
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EP
European Patent Office
Prior art keywords
pile
cavity
forming
branch
pressing device
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
Application number
EP19890121260
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German (de)
English (en)
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EP0370396A3 (fr
EP0370396A2 (fr
Inventor
Zhang Junsheng
Xu Yanqin
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.)
Junsheng Zhang
YANQIN, XU
Original Assignee
Individual
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Filing date
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Publication of EP0370396A2 publication Critical patent/EP0370396A2/fr
Publication of EP0370396A3 publication Critical patent/EP0370396A3/fr
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Publication of EP0370396B1 publication Critical patent/EP0370396B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/22—Piles
    • E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
    • E02D5/38—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds
    • E02D5/44—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds with enlarged footing or enlargements at the bottom of the pile

Definitions

  • This invention relates to a reinforced concrete load-bearing pile, especially used for consolidating foundations of buildings and bridges or other foundations, and to means and a method for forming the pile.
  • a concrete load-bearing foundation pile is known from US-A-1 521 522 having fins projecting radially which are integral with the pile body. These fins are arranged in groups along the axis of the pile body. Furtheron, the pile body has an enlarged footing integrated with the body.
  • a reinforced concrete load-bearing foundation pile which is considered as the nearest prior art is disclosed in FR-A-2 370 170 and comprises a pile-body, having a concrete pipe and a cast-in-place enlarged footing integrated with the body.
  • the object of the invention is to provide a reinforced concrete load-bearing pile for consolidating foundations, means and a method for forming such a pile which allow to save construction material, manpower, energy and investment costs.
  • a reinforced concrete load-bearing pile for consolidating foundations having a pile body, comprising a concrete pipe in a main pile cavity and a cast-in-place enlarged footing integrated with the body wherein the pile body comprises said concrete pipe and a concrete core, said concrete pipe having at least one branch opening thereon, and at least a concrete branch integrated with said pile body.
  • Means for forming this load-bearing pile comprises a concrete pipe (4) having at least one branch opening thereon and forming a pile cavity drilling/pressing device, a branch cavity pressing device and an enlarged footing cavity pressing device.
  • the pile cavity drilling/pressing device is firstly used to form a main pile cavity; then, the branch cavity pressing device and the enlarged footing cavity pressing device are successively used to form at least one branch cavity and enlarged footing cavity; after the whole pile cavity is completed, reinforcing steel bars may be placed into the cavity and casting is carried out.
  • Fig. 1 is a sketch of a load-bearing pile with multi-branches and enlarged footings according to the invention.
  • Fig. 2 is a sketch of a pile cavity drilling/pressing device.
  • Fig. 3. is a sketch of a modified pile cavity drilling/pressing device.
  • Fig. 4 is a sketch of a branch cavity pressing device.
  • Fig. 5 is a sketch of an enlarged footing cavity pressing device.
  • a reinforced concrete load-bearing pile comprises a pile body, at least one branch and enlarged footing which are integrated with the pile body.
  • the branches can be connected to any part of the pile body, preferably arranged in groups along the axis of the pile body.
  • the branches of each group are preferably staggered with those of adjacent groups.
  • the numbers of groups and branches in each group are determined according to the condition of ground, building, etc.
  • the pile body may consist of a concrete pipe with correspondingly arranged openings for forming branches, and a core.
  • the enlarged footings can be connected with the pile body. e.g., at the bottom end of the pile body. The enlarged footing, together with all the branches provides a larger supporting area, thus ensuring higher load-bearing capability of the pile.
  • the load-bearing pile according to the present invention can be wholly or partly casted-in-place after a corresponding cavity is formed.
  • Means for forming the pile comprises a pile cavity drilling/pressing device, a branch cavity pressing device and an enlarged footing cavity pressing device.
  • the pile cavity drilling/pressing device can be used to form a cavity for the pile body. It consists of a pipe body with a blade portion provided at one end and strengthening portion at the end part of the blade portion. There can be at least one opening provided on the pipe body used for forming branch cavities. In order to remove soil inside the pipe body to form the pile cavity, means such as an earth auger with screw blades can be provided. In case of soft ground, a movable conical head is provided at the beginning end of the pipe body forming the pile cavity without removing any soil.
  • a modified structure of the device may have a spiral cutting blade connected to the outside of the pipe body.
  • the branch cavity pressing device can be either single-armed or multi-armed.
  • Each arm has a chisel bearing, a support connected to the bearing bottom and a chisel which is arranged inside the bearing and composed of flexibly connected a chisel end, power transmitting parts and a chisel head.
  • a movable support can be futher provided at the bottoms of the supports for positioning and supporting, and the chisel bearings can be connected or integrated.
  • the said support of the device guides the direction of the chisel head.
  • the transmilting parts can be balls preferably.
  • the enlarged footing cavity pressing device comprises a column with a collar fixed at one end and two collars slidably mounted thereon, pairs of pivoted arms pivots with the collars at the same side of the column, a sleeve is slidably provided on the other end of the column.
  • two pairs of pivoted arms are arranged symmetrically.
  • branches 2 are obliquely integrated with a pile body 1, which comprises a concrete pipe 4 and a core 5.
  • the concrete pipe 4 may be embeded reinforcing steel.
  • the branches 2 are arranged in pairs along the pile body 1.
  • the two branches 2 in each pair are symmetrically arranged and staggered with those in adjacent pairs.
  • An enlarged footing 3 connects to the bottom end of the pile body 1.
  • Fig. 2 shows a pile cavity drilling/pressing device which is in the form of a pipe.
  • a blade portion 11 is provided at one end of the pipe body 14. The thickness of the pipe wall increases from the blade end.
  • a strengthening portion which is in the form of a round collar 12, is provided.
  • At least one opening 13 can be provided on the pipe body 14 for forming branch cavities.
  • the device can be used for either soft ground or stiff ground, preferably for firm ground. It can be driven into ground by pressing.
  • Fig. 3 shows a modified pile cavity drilling/pressing device, which is preferred for soft ground.
  • This device is further provided with a spiral cutting blade 23 connected to the outside of the pipe body.
  • Means for removing soil such as an earth auger or a pump (not shown) is provided; or a movable conical head 25 is provided at the blade end of the pipe body to form a pile cavity without removal of any soil.
  • This device can be driven into ground by rotating.
  • Fig. 4 shows a preferred embodiment of a branch cavity pressing device which is symmetrically twin-armed.
  • Each of the arm has a chisel bearing 30, a support 31 connected to the bearing bottom, and a chisel arranged in the cavity of the chisel bearing 30 and composed by flexibly connecting a chisel end 32, power transmitting balls 33 and a chisel head 34.
  • a movable support 35 is provided at the bottoms of the supports 31.
  • the supports 31 are obliquely arranged and can be used as guides.
  • Fig. 5 shows a preferred enlarged footing cavity pressing device.
  • a fixed collar 42 is provided at one end of a column 37.
  • Two collars 39 slidably mounted on the column 37.
  • a pair of pivoted arms 40 pivot with the movable collars 39 at the same side of the column 37, and another pair of arms 40 at the other side. The said two pairs of arms are symmetricaly arranged.
  • a sleeve 38 is slidably mounted at the other end of the column 37. As the sleeve 38 moves downwardly, the pivoted arms 40 are folded. Thus, the radial dimension of the device is increased.
  • a pile cavity is firstly formed and a concrete pipe is placed into the cavity. Then branch cavities and enlarged footing cavities are to be formed said branch cavities being formed through openings of the concrete pipe. As a cavity of the pile is completed, reinforcing steel can be put in and casting-in-place can be carried out.
  • the pile cavity drilling/pressing device can be used to form the pile cavity.
  • Either a pipe type device or a screw type device can be used according to the degree of compactness of the soil.
  • the device can be driven into the ground either vertically or at an angle of inclination.
  • An earth auger 24 is used to take out the soil (or a mud pump can be used to pump out the mud).
  • a movable conical head 25 is mounted at the beginning part of the device, a pile cavity may be formed without taking out the soil. If the ground is stiff, the pile drilling/pressing device can be taken out when the cavity is made.
  • the branch cavities can be made through the openings on the pipe body, and the enlarged footing cavities can also be made at the end of the pipe body.
  • the pile drilling/pressing device may be withdrawn first, and a precast concrete tube 4 is put in instead. Then the branch cavities and the enlarged footing cavities are made.
  • the chisel head 34 of the branch cavity pressing device is directed to either the openings 13 on the pipe body 14 of the drilling/pressing device (there may be a pair of openings at one level and another pair of openings at different positions of a different level), or to the openings provided on the precast concrete pipe 4. Pressure is applied at the chisel end 32.
  • the chisel head 34 can be taken out at any time for filling consolidating material (soilid waste, backfill, etc), so that the surroundings and base of the branch cavities can be consolidated.
  • consolidating material so that the surroundings and base of the branch cavities can be consolidated.
  • the enlarged footing cavity pressing device is introduced into the pile cavity to a predetermined depth (there can be more than one enlarged footing for one pile), then,the pressing sleeve 38 is pressed continually while the device is rotated.
  • the pivoted arms 40 may form a cavity for the enlarged footing after the device being rotated 180°.
  • Enlarged footing may also be made with the branch cavity pressing device by turning the chisel bearing 30 while pressing the chisel end 32, getting the same effect as using the enlarged footing cavity pressing device.
  • filling materials may be added, and the base may be compacted by means of rammers so as to increase the degree of compactness of the soil layer.
  • the branches and enlarged footing cavities reinforcing steel bars may be placed into the cavity and concrete may be cast.
  • Branches may be precasted. When the branch cavities are made, the precasted branches may be put into place by means of the branch cavity pressing device. The pile can finally be casted.

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  • 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)

Claims (23)

  1. Pieu de reprise de charge, en béton armé, pour consolider les fondations, comportant un corps de pieu (1), comprenant un tube en béton (4) dans un trou principal pour le pieu et une semelle agrandie (3), coulée en place et solidarisée avec le corps (1), pieu caractérisé par le fait que le corps de pieu (1) comprend ledit tube en béton (4) et un noyau en béton (5), ledit tube en béton (4) présentant sur lui au moins une ouverture pour branche et au moins une branche en béton (2) solidarisée avec ledit corps de pieu (1).
  2. Pieu selon la revendication 1, dans lequel les branches (2) sont disposées en groupes le long de l'axe du corps du pieu (1).
  3. Pieu selon la revendication 2, dans lequel il y a deux branches (2) dans un groupe.
  4. Pieu selon la revendication 2, dans lequel les branches (2) de chaque groupe sont disposées symétriquement et décalées avec celles des groupes adjacents.
  5. Pieu selon la revendication 2, dans lequel les branches (2) sont préfabriquées.
  6. Pieu selon la revendication 2, caractérisé par le fait que les trous pour les branches sont formés obliquement par rapport au trou principal pour le pieu.
  7. Moyen de formation d'un pieu conforme à la revendication 1, comportant un tube en béton (4) présentant sur lui au moins une ouverture pour branche (13) et constituant un dispositif (11-14) de forage/de pressage d'un trou pour pieu, ainsi qu'un dispositif (30-35) de pressage de trou pour branche et qu'un dispositif (37-40,42) de pressage de trou agrandi pour semelle.
  8. Moyen de formation d'un pieu conforme à la revendication 7, dans lequel ledit dispositif de pressage du trou pour branche présente un support (30) de trépan, un appui (31) relié à la partie inférieure du support et un trépan disposé dans la cavité du support de trépan (30) et composé d'une tête de trépan (34) et d'éléments (33) de transmission de la puissance reliés de façon souple à une extrémité (32) du trépan.
  9. Moyen de formation d'un pieu conforme à la revendication 7, dans lequel ledit dispositif de pressage du trou pour branche comporte plusieurs bras, chaque bras du dispositif présente un support (30) de trépan , un appui (31) relié à la partie inférieure du support et composé d'une tête de trépan (34) et d'éléments (33) de transmission de la puissance reliés de façon souple à une extrémité (32) du trépan, un appui mobile (35) est prévu aux bases des supports (31).
  10. Moyen de formation d'un pieu conforme à la revendication 8 ou 9, dans lequel lesdits éléments (33) de transmission de la puissance sont en forme de boules.
  11. Moyen de formation d'un pieu conforme à la revendication 9, dans lequel ledit dispositif de pressage du trou pour branche présente des bras jumeaux disposés symétriquement, les supports (30) de trépan sont formés solidairement.
  12. Moyen de formation d'un pieu selon la revendication 7, dans lequel ledit dispositif de forage/de pressage du trou pour pieu comporte un corps tubulaire (14), une portion en forme de lame (11,21) est prévue à l'extrémité avant du corps tubulaire (14), avec une portion de renfort (12,22) à la partie d'extrémité de la portion en forme de lame (11).
  13. Moyen de formation d'un pieu conforme à la revendication 12, dans lequel ledit dispositif de forage/de pressage du trou pour pieu présente au moins une ouverture pour branche (13) prévue sur le corps tubulaire (14).
  14. Moyen de formation d'un pieu conforme à la revendication 12, dans lequel sont prévus des moyens pour enlever le sol, par exemple une tarière (24) pour la terre, avec des filets de vis.
  15. Moyen de formation d'un pieu conforme à la revendication 12, dans lequel une lame de coupe spirale (23) est prévue à l'extérieur du corps tubulaire (14).
  16. Moyen de formation d'un pieu conforme à la revendication 12, dans lequel une tête conique amovible (25) est prévue à l'extrémité avant du corps tubulaire (14).
  17. Moyen de formation d'un pieu conforme à la revendication 7, dans lequel ledit dispositif de pressage du trou agrandi pour la semelle comporte une colonne (37) avec un collet (42) fixé à l'une des extrémités et deux colliers (39) montés sur elle avec liberté de coulissement, au moins une paire de bras pivotant (40) pivotent en étant situés du même côté de la colonne (37) que les colliers (39), un fourreau (38) est prévu, avec liberté de coulissement, sur l'autre extrémité de la colonne (37).
  18. Procédé de formation d'un pieu conforme à la revendication 1, en formant un trou pour pieu, en plaçant dans le trou un tube en béton (4), en formant au moins un trou agrandi pour semelle et en coulant le pieu, procédé caractérisé par le fait que l'on forme au moins un trou pour branche par les ouvertures du tube de béton (4) et que l'on coule la branche de béton solidairement avec ledit pieu (1).
  19. Procédé de formation d'un pieu conforme à la revendication 18, caractérisé par le fait que l'on consolide l'environnement et les bases du trou pour branche et du trou agrandi pour semelle.
  20. Procédé selon la revendication 18, comportant en outre le fait d'ajouter un matériau de charge dans le trou pour branche et dans le trou agrandi pour semelle pendant la consolidation de l'environnement et des bases des trous de façon que le matériau de charge se combine avec la terre environnant les trous et que la terre se compacte.
  21. Procédé selon la revendication 18, caractérisé par le fait que l'on forme les trous pour branche en groupes le long du trou pour pieu, les trous pour branche dans chaque groupe étant décalées par rapport à celles des groupes adjacents.
  22. Procédé selon la revendication 18, dans lequel on introduit dans le trou pour pieu, à une position prédéterminée, un dispositif (30-35), présentant un trépan, de pressage d'un trou pour branche, que l'on applique la pression sur l'extrémité (32) du trépan pour entrainer la tête (34) du trépan dans la terre.
  23. Procédé selon la revendication 18, dans lequel on introduit dans le trou pour pieu, à une position prédéterminée, le dispositif, présentant un fourreau (38), de pressage du trou agrandi pour semelle, on entraine en rotation le dispositif en même temps que l'on presse le fourreau (38) pour agrandir l'espace pour une semelle agrandie (3).
EP19890121260 1988-11-22 1989-11-17 Pieux de support de charge en béton armé à plusieurs branches et base élargie, et moyens pour former le pieu Expired - Lifetime EP0370396B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN88220149U CN2046512U (zh) 1988-11-22 1988-11-22 预制钢筋混凝土花管、分支承载桩施工装置
CN88220149 1988-11-22

Publications (3)

Publication Number Publication Date
EP0370396A2 EP0370396A2 (fr) 1990-05-30
EP0370396A3 EP0370396A3 (fr) 1991-04-03
EP0370396B1 true EP0370396B1 (fr) 1993-06-09

Family

ID=4852424

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890121260 Expired - Lifetime EP0370396B1 (fr) 1988-11-22 1989-11-17 Pieux de support de charge en béton armé à plusieurs branches et base élargie, et moyens pour former le pieu

Country Status (4)

Country Link
EP (1) EP0370396B1 (fr)
JP (1) JPH02243820A (fr)
CN (1) CN2046512U (fr)
CA (1) CA2003376C (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9724024D0 (en) * 1997-11-13 1998-01-14 Kvaerner Cementation Found Ltd Improved piling method
CN1057363C (zh) * 1998-07-10 2000-10-11 贺德新 一种液压挤扩装置
CN100393947C (zh) * 2006-06-05 2008-06-11 马金五 夯扩承力盘桩的施工方法
CN101768962B (zh) * 2009-01-05 2013-09-25 吴保全 预制花管桩
JP2019007149A (ja) * 2017-06-21 2019-01-17 菱建基礎株式会社 フリクションカットケーシング
CN113818470B (zh) * 2021-09-20 2023-05-02 肇庆市建筑工程有限公司 一种建筑施工基桩
CN114263169B (zh) * 2021-11-12 2023-06-20 中冶建筑研究总院有限公司 一种钢管桩
CN114277835B (zh) * 2022-03-07 2022-06-17 中国海洋大学 加固海床的抗拔灌注桩及其施工方法

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1443306A (en) * 1919-08-05 1923-01-23 Blumenthal Maurice Means for and method of producing concrete piles
US1521522A (en) * 1923-12-05 1924-12-30 Fowler Charles Evan Caisson and method of making the same
GB331945A (en) * 1929-04-19 1930-07-17 Callenders Cable & Const Co Improvements connected with the production of foundations for poles and the like
FR1427486A (fr) * 1965-03-24 1966-02-04 Gnii Keramzitu Dispositif pour créer des empattements locaux dans les puits à pieux coulés dans des sols liés
DE2436093A1 (de) * 1974-07-24 1976-02-12 Mannesmann Roehren Werke Ag Rammpfahl mit einbringbaren spreizgliedern
JPS5358105A (en) * 1976-11-08 1978-05-25 Nippon Concrete Ind Co Ltd Method of generating supporting force for middle excavation system
JPS5433313A (en) * 1977-08-17 1979-03-12 Marugo Kk Concrete pile
JPS54161715A (en) * 1978-06-12 1979-12-21 Kazuhiro Kawase Foundation pillar and method of executing foundation pillar
JPS55155825A (en) * 1979-05-23 1980-12-04 Marugo Kiso Kogyo Kk Burying method for pile with extension shoe
JPS5634823A (en) * 1979-08-30 1981-04-07 Touparu Gijutsu Kenkyusho:Kk Concrete pile injection constructing method
JPS57193621A (en) * 1981-05-23 1982-11-29 Tadayoshi Fujimatsu In-place reinforced concrete expanded bottom foundation pile and its construction and bit therefore
JPS6059224A (ja) * 1983-09-07 1985-04-05 Kazuhiko Kishigami 基礎杭の構築方法
JPS62160315A (ja) * 1985-12-30 1987-07-16 Kajima Corp 杭の埋込み工法
JP3573794B2 (ja) * 1994-06-20 2004-10-06 三洋電機株式会社 温風暖房機

Also Published As

Publication number Publication date
EP0370396A3 (fr) 1991-04-03
JPH02243820A (ja) 1990-09-27
CA2003376A1 (fr) 1990-05-22
EP0370396A2 (fr) 1990-05-30
CN2046512U (zh) 1989-10-25
CA2003376C (fr) 1999-07-27

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