EP0417111A1 - Procede de formation de piliers de consolidation et de fondation avec armatures incorporees - Google Patents

Procede de formation de piliers de consolidation et de fondation avec armatures incorporees

Info

Publication number
EP0417111A1
EP0417111A1 EP19890904201 EP89904201A EP0417111A1 EP 0417111 A1 EP0417111 A1 EP 0417111A1 EP 19890904201 EP19890904201 EP 19890904201 EP 89904201 A EP89904201 A EP 89904201A EP 0417111 A1 EP0417111 A1 EP 0417111A1
Authority
EP
European Patent Office
Prior art keywords
procedure
pipe
consolidation
reinforcement
type embodiment
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.)
Withdrawn
Application number
EP19890904201
Other languages
German (de)
English (en)
Inventor
Dino Canepari
Cesare Melegari
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.)
INIECTOJET SpA
Original Assignee
INIECTOJET 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.)
Filing date
Publication date
Application filed by INIECTOJET SpA filed Critical INIECTOJET SpA
Publication of EP0417111A1 publication Critical patent/EP0417111A1/fr
Withdrawn legal-status Critical Current

Links

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
    • E02D5/385—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

Definitions

  • the invention relates to a procedure for in-situ casting of consolidation and foundation piles with embedded reinforcements.
  • the prior art embraces methods of consolidating the soil that consist essentially in preparing a liquid mix of concrete and binders and injecting it into the ground at ultra-high pressure.
  • the mix is injected by sinking a rod into the earth to the envisaged consolidation depth.
  • a rod is provided with a special boring head, and with a injection valve carrying one or more nozzles disposed at right angles to the rod axis, substantially within the same transverse plane.
  • the rod is mounted to a device by which it is rotated and traversed along its own axis.
  • Ultra-high pressure injection of the mix occurs as the rod is withdrawn, rotating about its axis.
  • the conventional method thus outlined is beset by certain drawbacks in given applications such as those, for example, where a reinforcement has to be embedded axially in the concrete. This is achieved, conventionally, by casting the consolidation pile and then positioning tubular or other reinforcing members in a separate operation: such a procedure involves a considerable waste of time, and cannot ensure coaxial alignment between the reinforcement and the cast; the reinforcement can in fact become deflected uncontrollably during the positioning step, occasioning a subsequent loss of performance in terms of strength specifications.
  • the object of the invention is to set forth a procedure that will permit of positioning any given reinforcement of tubular or cage type embodiment in a consolidation pile cast in-situ using high pressure injection techniques, ensuring coaxial alignment between the reinforcement and the cast, and of accomplishing such operations swiftly and inexpensively.
  • figs 1...4 illustrate four steps of the casting procedure disclosed
  • figs 5 and 6 are sectional illustrations of the consolidation pile showing two different types of reinforcement
  • figs 7 and 8 are sectional illustrations of the consolidation pile showing two different types of pipe, seen during the withdrawal step.
  • the first step of the procedure is that of sinking a bore in the ground 1 down to a prescribed consolidation depth 2, using conventional mechanical equipment 3 by means of which a pipe 5 is driven straight into the soil, traversing along its own axis.
  • 6 denotes a rotatable rod inserted into the pipe 5, the end of which carries a drill head. With the spoil removed and the pipe 5 firmly in position, the rod 6 is withdrawn (fig 2) , and the pipe left
  • the side wall of the pipe 5 is perforated to enable the passage of liquid concrete from inside to ' outside, as will occur in a subsequent step of the procedure.
  • the third step of the procedure (fig 3) consists in positioning a reinforcement 7 in the bore; such a reinforcement might be tubular, as illustrated in fig 5, or composed of single bars or wires arranged to coincide with the generators of an imaginary
  • the final step of the procedure is one of pumping liquid concrete into the bore at high pressure and withdrawing the perforated pipe 5 at one and the same time, thereby consolidating the soil around a
  • Fig 7 illustrates a pipe 5a affording an annular cavity
  • the pipe 5b illustrated in fig 8 affords a set of channels arranged to coincide with
  • the reinforcement might be embodied as a cage, or tubular, or as a rod, or indeed as a simple pole, without any difficulty as regards its embedding in and alignment with the cast.
  • Casting pressure may vary between 300 and 800 bar, according to requirements, without affecting the position of the reinforcement inside the pipe 5.
  • the cavity of a pipe 5 as in fig 7 can be used to pump in back-fill material or to pump out spoil: materials pumped in could be concrete, mortar or any filling considered suitable for the purpose; in the case of materials pumped out, control will be provided over any excess pressure occasioned by the high injection pressure and disposal of the spoil.

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

Le domaine d'application de la présente invention est celui du coulage de piliers de consolidation et de fondation in situ, obtenus au moyen de procédés de coulage par injection de béton liquide sous ultra-haute pression. Dans le procédé décrit, on installe une armature métallique (7) avant d'effectuer le coulage.
EP19890904201 1989-03-22 1989-03-22 Procede de formation de piliers de consolidation et de fondation avec armatures incorporees Withdrawn EP0417111A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IT1989/000020 WO1990011412A1 (fr) 1989-03-22 1989-03-22 Procede de formation de piliers de consolidation et de fondation avec armatures incorporees

Publications (1)

Publication Number Publication Date
EP0417111A1 true EP0417111A1 (fr) 1991-03-20

Family

ID=11331347

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890904201 Withdrawn EP0417111A1 (fr) 1989-03-22 1989-03-22 Procede de formation de piliers de consolidation et de fondation avec armatures incorporees

Country Status (2)

Country Link
EP (1) EP0417111A1 (fr)
WO (1) WO1990011412A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BR9007509A (pt) * 1989-07-06 1992-06-23 Egorov Alexei L Processo de moldagem de estacas e conjunto de aparelhamento para moldagem de estacas
IT1254303B (it) * 1992-02-07 1995-09-14 Procedimento per la realizzazione di un micropalo per fondazioni di edifici adatto a terreni con caratteristiche meccaniche scadenti.
FR2708947B1 (fr) * 1993-08-09 1995-11-03 Intrafor Dispositif pour précontraindre un micropieu destiné à soutenir une fondation et micropieu ainsi précontraint.
IT1286418B1 (it) 1996-12-02 1998-07-08 Uretek Srl Procedimento per incrementare la portanza di terreni di fondazione per costruzioni edili
DE19721361C2 (de) * 1997-05-22 2001-01-04 Zueblin Ag Verfahren zur Herstellung von Pfählen und solchermaßen hergestellte Pfähle
DE19744322C1 (de) * 1997-10-08 1999-01-28 Juergen Kretschmar Verfahren und Vorrichtung zum Einbringen von Ankern in sandigen, kiesigen oder bindigen Böden
SG93217A1 (en) * 1999-10-15 2002-12-17 Abv Engineering Pte Ltd Bored piles
DE10338171B4 (de) * 2003-08-20 2007-10-25 Keller Grundbau Gmbh Verfahren zum Einbringen eines schlanken Bodenpfahls und nach diesem Verfahren hergestellter Bodenpfahl

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH466997A (de) * 1964-05-13 1968-12-31 Failla Ignazio Verfahren zur Erzeugung von Baustrukturen im Erdreich
DE2120691A1 (de) * 1971-04-27 1972-11-09 Jebens, Claus, Dipl.-Ing., 2000 Hamburg Verfahren zur Herstellung eines Verbundpfahles
EP0151389B1 (fr) * 1984-01-11 1990-07-25 Stump Bohr GmbH Méthode et dispositif pour la réalisation d'éléments de construction dans le sol tels que pieux, ancrages injectés, murs souterrains ou similaires
GB2154630B (en) * 1984-02-24 1986-09-17 Matsuzawa Kiko Kabushiki Kaish Construction method for foundation piling

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9011412A1 *

Also Published As

Publication number Publication date
WO1990011412A1 (fr) 1990-10-04

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