EP0250428B1 - Ortbetongründungspfähle mit eintreibbarer röhrenförmiger verschalung - Google Patents

Ortbetongründungspfähle mit eintreibbarer röhrenförmiger verschalung Download PDF

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Publication number
EP0250428B1
EP0250428B1 EP86901994A EP86901994A EP0250428B1 EP 0250428 B1 EP0250428 B1 EP 0250428B1 EP 86901994 A EP86901994 A EP 86901994A EP 86901994 A EP86901994 A EP 86901994A EP 0250428 B1 EP0250428 B1 EP 0250428B1
Authority
EP
European Patent Office
Prior art keywords
tube
shaped form
shaped
framework
shaped element
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
Application number
EP86901994A
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English (en)
French (fr)
Other versions
EP0250428A1 (de
Inventor
Ambrogio Fioruzzi
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ICELS PALI SpA
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ICELS PALI SpA
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.)
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Publication date
Application filed by ICELS PALI SpA filed Critical ICELS PALI SpA
Priority to AT86901994T priority Critical patent/ATE53086T1/de
Publication of EP0250428A1 publication Critical patent/EP0250428A1/de
Application granted granted Critical
Publication of EP0250428B1 publication Critical patent/EP0250428B1/de
Expired 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
    • E02D9/00—Removing sheet piles bulkheads, piles, mould-pipes or other moulds or parts thereof
    • E02D9/02—Removing sheet piles bulkheads, piles, mould-pipes or other moulds or parts thereof by withdrawing
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D15/00—Handling building or like materials for hydraulic engineering or foundations
    • E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
    • E02D15/04—Placing concrete in mould-pipes, pile tubes, bore-holes or narrow shafts
    • 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
    • E02D5/385—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds with removal of the outer mould-pipes
    • 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
    • E02D5/62—Compacting the soil at the footing or in or along a casing by forcing cement or like material through tubes

Definitions

  • the present invention relates to a method for the in-situ casting of foundation piles with a recoverable tube-shaped form, as well as to the device for carrying out said method. More particularly, the invention relates to a method for obtaining an in-situ cast foundation pile supplied with a provisional tube-shaped form, said pile being of improved and measurable foot load capacity, as well as to the device for carrying out the method itself.
  • a further drawback observed in the technology of in-situ casting foundation piles with recoverable tube-shaped forms is the lack of a method for carrying out checking or testing operations after the in-situ casting of a pile in order to know whether the drawbacks mentioned above have occurred and at what extent.
  • Said document relates not only to a method of in situ-casting foundation piles but also to a method and device for removing the driven piles from the soil, an hydraulic jack being provided is said device for measuring, by the pressure gauge, the maximum pressure at which occurs the relative movement between the pipe and core member.
  • French Patent No.2006605 describes a method and a device for removing a driven pile from the soil in a in-situ casting foundation pile.
  • the present engineering design opposes said drawback by increasing the safety coefficients to the detriment of saving of realization costs.
  • the solution proposed according to the present invention allows the load capacity of the pile tip which is on the way of forming to be increased as a result of the distribution of pressure on the bottom of the hole, so undoing the negative effect of the possible presence of soil debris on the bottom.
  • a further advantage according to the present invention consists in the possibility of blocking simultaneously on the bottom the lower end of the cage which is opportunely shaped, so as to prevent said cage as well as the fresh concrete contained within the tube-shaped form from being dragged up together with said form as a result of friction.
  • a method is defined of producing foundation piles by employing a recoverable tube-shaped form, a reinforcement cage within said form and a cylindrical tube-shaped element within said rein- formcement cage, as well as gauge means for measuring the load capacity of the pile, wherein after said recoverable tube-shaped form is driven into the soil and said reinforcement element arranged therein, the tube-shaped element is centrally placed within said reinforcement cage to have its upper portion projecting above the upper end of said tube-shaped form, a frame structure having upper and lower frameworks connected by jack means is slidably mounted on said upper portion of said tube-shaped element, said lower framework is clamped on the upper end of said tube-shaped cage and the upper framework is removably engaged with a lower one of a plurality of parallel projections provided on said upper portion of said tube-shaped element, said jack means are retracted to cause said upper framework to downwardly push said tube-shaped element to bear directly or indirectly on the lower end of the cage, to consolidate the base
  • a device comprises a recoverable tube-shaped form, a reinforcement cage within said form, a cylindrical tube-shaped element within said reinforcement cage, jack means adapted to act on said tube-shaped element and gauge means for measuring stresses exerted by said jack means, wherein said tube-shaped element at its lower end bears directly or indirectly on the lower end of the cage and has a plurality of openings for introducing the concrete into said tube-shaped form and an upper portion extending above the upper end of said tube-shaped form, said jack means is located in a framework structure having an upper framework and a lower framework, the framework structure being adapted to slide on said upper portion of said tube-shaped element, and the jack means comprising two jacks arranged between the frameworks symmetrically to said upper portion of said tube-shaped element, annular projections are provided on said upper portion parallely to one another, said upper framework has hook means adapted to engage said annular projection and said lower framework has clamping means for clamping the upper end of said tube-shaped form
  • said means for the transmission of the compressive stress are made up of a hollow column which is provided, by preference at its lower end resting on said means for the distribution of the stress, with outlets for the concrete which is introduced preferably at a point corresponding to its upper edge, enagement means being provided for the engagement with said means for generating the compressive stress at a point corresponding to its top part.
  • said means for generating the compressive stress consist of a pair of hydraulic jacks connected at their lower parts with a horizontal framework which is integral with the top part of the tube-shaped form, and at their upper parts with another horizontal framework having means for the engagement with said hollow column and in which said means for measuring the compressive stress consist of pressure gauge means.
  • a tube-shaped form 2 can be observed driven into the soil 20, in the inside of which form a cage 6 is provided wherein the longitudinal bars are bent towards the inside in correspondence to the bottom so as to form a supporting surface for an expendable plate 1 for the distribution of the compressive stress when the base of the tube-shaped form 2 reaches the depth according to the design (see also Figure 2).
  • the support for the plate 1 can be obtained by welding the longitudinal bars with coplanar transversal bars 7 in a number adequate for housing the plate 1.
  • a hollow column or tube 3 rests direct on the supporting means provided at the base of the cage 6 (see Figure 4).
  • the lower end of the hollow column member 3 rests on the plate 1, said member being provided near its lower end with openings or mouths 5 for the outlet of concrete fed at a point corresponding to its upper end 4.
  • a number of projecting parts 15, 16, 17 are provided on the upper part of the outside surface of said hollow column 3, said projecting parts being designed for successive engagement with the hooks 14 integral with a horizontal framework 13 making part of a system which generates the compressive stress and is made up of a pair of hydraulic jacks 12 operating on said horizontal framework 13 and connected at their lower parts to a horizontal framework 10 that is integral with a tightening device 11 at the top of the tube-shaped form 2.
  • the operation of the device according to the present invention occurs in the following way: when the hydraulic jacks 12 are retracted, the horizontal framework 13 is also acted upon and the same, through the hooks 14 and the projecting part 15 of which said tube 3 is provided in its upper part, puts under compression said tube 3, and simultaneously stresses the tube-shaped form 2 upwards with a force which is capable of outweighing both the frictional forces and the weight of said tube-shaped form 2 so as to extract the same from the soil by a distance corresponding to the closing stroke of jacks 12.
  • the hydraulic jacks 12 are extended and said hooks 14 go into engagement with the next projecting part 16 of the tube 3 in the upper position and so on till the tube-shaped form 2 has been extracted from the ground at least by a length such that the pile portion already formed is sufficient to ensure the absence of dragging phenomena upwards of concrete and/or of the cage.
  • the horizontal framework 10 for the connection to the tube-shaped form 2 and for supporting the hydraulic jacks 12 is made up of a rotating head unit for realizing piles with the tube-shaped form inserted into the ground with a rotohelicoidal system
  • a rotating joint can be inserted into the horizontal framework 10 or into the horizontal framework 13 or otherwise into the hollow column 3 in order to allow the lower part of the device according to the present invention to rotate or oscillate together with the tube-shaped form 2 and possibly together with the closing system 18 ( Figures 5 and 6) in any step of the procedure.
  • the tube 3 acts as an expeller of the closing system 19 or 21, outweighing automatically the forces that contrast the separation which could act in the coupling connection between the tube-shaped form 2 and the closing system 19 or 21, which forces could be present as a result of the lack of clearance at the beginning of the operation as well as because of deformations of the closing system 19 and 21 occurring during the introduction of the tube-shaped form 2 into the ground.

Landscapes

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

Claims (3)

1. Verfahren Zur Herstellung von Grundpfahlen bei Anwendung einer rueckgewinnbaren Rohrform (2), einer Verstaerkungsbewehrung (6) innerhalb der genannten Rohrform und eines rohrfoermigen Zylinderelements (3) innerhalb dieser Verstaerkungsbewehrung, sowie eines Messmittels zum Messen der Tragfaehigheit des Grundpfahles, dadurch gekennzeichnet, dass nach Einfuehren in den Boden der genannten Rohrform und des genannten Verstaerkungsbewehrung in diese Rohrform, das rohrfoermige Zylinderelement (3) mittig innerhalb der Verstaerkungsbewehrung (6) so angeordnet wird, dass sein Oberteil oberhalb des oberen Endes der Rohrform (2) vorspringt; dass ein aus einen oberen und einen unteren, miteinander durch eine Winde (12) verbundenen Rahmen (13 und 10) bestehendes Rahmenwerk auf dem oberen Teil des rohrfoermigen Elementes (3) verschiebbar angeordnet ist, wobei der untere Rahmen (10) am oberen Ende der Rohrform befestigt und der obere Rahmen (13) am untersten einer Mehrzal von an der oberen Flaeche des rohrfoermigen Elementes (3) vorgesehenen, zueinander parallelen Verspruengen (15, 16, 17) loesbar angeklinkt ist; dass die Winde den oberen Rahmen (13) nach unten verstellt, um somit das rohrfoermige Element (3) nach unten zu druecken und auf dem unteren Ende der Bewehrung direkt oder indirekt abzustuetzen, wodurch der Fuss des Pfales verfestigt und die Rohrform (2) aus dem Boden allmaehlich entfernt wird, wobei der obere Rahmen (13) mit den nachfolgenden Vorspruengen aufwaerts stufenweise gespannt wird, waehrend gleichzeitig eine Zementmischung in die Rohrform durch eine axialle Bohrung und seitlich, nahe unteren Endes der Rohrform vorgesehene Oeffnungen (5) eingegossen wird.
2. Vorrichtung zur Durchfuehrung des Verfahrens nach Anspruch 1 mit einer rueckgewinnbaren Rohrform (2), einer Verstaerkungsbewaehrung (6) innerhalb dieser Form, einem rohrfoermigen Zylinderelement (3) innerhalb der Verstaerkungsbewaehrung, einer auf das rohrfoermige Zylinderelement aufwirkenden Winde und mit Messmitteln zu Messen der durch die Winde ausgeuebten Kraft, dadurch gekennzeichnet, dass das untere Ende des rohrfoermigen Elementes (3) sich direkt oder indirekt auf dem unteren Ende der Bewaehrung abstuetzt und eine mehrzahl von Oeffnungen (5) zum Eingiessen von Beton in die Rohrform (2) aufweist, waehrend das obere Ende sich oberhalb der Rohrform (2) erstreckt; dass Windemittel (12) in einem aus einem oberen Rahmen (13) und einem unteren Rahmen (10) bestehenden und auf dem oberen Teil des rohrfoermigen Elementes verschiebbaren Rahmenwerk angeordnet sind und aus zwei Einden (12) bestehen, die zwischen den Rahmen (10, 13) symmetrisch zum oberen Teil des rohrfoermigen Elementes (3) angeordnet sind, wobei an diesem oberen Teil ringfoermige zueinander parallele Vorspruenge vorgesehen sind, der obere Rahmen (13) hakenfoermige, an diese ringfoermige Vorspruege (15, 16, 17) angreifende Elemente (14) aufweist und der untere Rahmen (10) Spannmittel (11) zum Spannen des oberen Endes der Rohrform (2) hat, wodurch bei Betaetigung der Winden (12), nach dem die hakenfoermigen Elemente (14) anfaenglich am untersten der Vorspruenge (15, 16, 17) gespannt wurden, auf das rohrfoermige Element (3) eine nach unten wirkende Kraft ausgeuebt wird, um den Fuss des Pfeiles zu verfestigen, die Rohrform (2) aus dem Boden um eine, dem Hub der Winden (12) entsprechende Strecke herauszuziehen und die hakenfoermigen Elemente (14) durch Verbreiterung der Winden (12) am naechstfolgenden Vorsprung angreifen zu lassen.
3. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, dass die hydraulischen Winden am deren unteren Teil mit einem wassgerechten Rahmenwerk verbunden sind, welches mit dem oberen Ende der Rohrform einteilig ist, und an seinem oberen Teil mit einem anderen Rahmenwerk verbunden sind, das Spannmittel zu spannen des rohrfoermigen Elements aufweist.
EP86901994A 1985-03-20 1986-03-14 Ortbetongründungspfähle mit eintreibbarer röhrenförmiger verschalung Expired EP0250428B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86901994T ATE53086T1 (de) 1985-03-20 1986-03-14 Ortbetongruendungspfaehle mit eintreibbarer roehrenfoermiger verschalung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT4783685 1985-03-20
IT8547836A IT1209942B (it) 1985-03-20 1985-03-20 Metodo per la realizzazione di pali di fondazione gettati in opera contubo-forma recuperabile e relativo dispositivo

Publications (2)

Publication Number Publication Date
EP0250428A1 EP0250428A1 (de) 1988-01-07
EP0250428B1 true EP0250428B1 (de) 1990-05-23

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ID=11262837

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86901994A Expired EP0250428B1 (de) 1985-03-20 1986-03-14 Ortbetongründungspfähle mit eintreibbarer röhrenförmiger verschalung

Country Status (5)

Country Link
EP (1) EP0250428B1 (de)
AU (1) AU5662386A (de)
DE (1) DE3671489D1 (de)
IT (1) IT1209942B (de)
WO (1) WO1986005533A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104452836A (zh) * 2014-12-10 2015-03-25 青岛理工大学 一种深基坑支护结构的稳定性检测预警方法

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10407859B2 (en) * 2016-02-22 2019-09-10 Board Of Regents Of The Nevada System Of Higher Education On Behalf Of The University Of Nevada, Reno Method and loading module to mechanically increase pile/drilled shaft end bearing stiffness
WO2017147083A1 (en) 2016-02-22 2017-08-31 Board Of Regents Of Nevada System Of Higher Education, On Behalf Of University Of Nevada, Reno Deep foundation porewater pressure dissipater
CN111519615B (zh) * 2020-04-22 2021-06-25 广东裕基建筑工程有限公司 人工挖孔桩结构以及挖孔桩灌注方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB833394A (en) * 1958-10-21 1960-04-21 Raymond Int Inc Method for making and installing concrete piles
BE670101A (de) * 1964-09-25 1966-01-17
US3316723A (en) * 1964-11-02 1967-05-02 Myles H Schutte Method and apparatus for forming foundation members
DE1759325A1 (de) * 1968-04-20 1971-06-03 Starkstrom Anlagen Gmbh Verfahren und Vorrichtung zum Ziehen des Rammkoerpers bei der Herstellung von Ortpfaehlen
US3654767A (en) * 1970-05-08 1972-04-11 Raymond Int Inc Method of forming a composite pile

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104452836A (zh) * 2014-12-10 2015-03-25 青岛理工大学 一种深基坑支护结构的稳定性检测预警方法

Also Published As

Publication number Publication date
WO1986005533A1 (en) 1986-09-25
DE3671489D1 (de) 1990-06-28
AU5662386A (en) 1986-10-13
IT8547836A0 (it) 1985-03-20
EP0250428A1 (de) 1988-01-07
IT1209942B (it) 1989-08-30

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