EP0417111A1 - Verfahren zur herstellung von verfestigungs- und gründungspfählen mit eingebetteter bewehrung - Google Patents
Verfahren zur herstellung von verfestigungs- und gründungspfählen mit eingebetteter bewehrungInfo
- 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- Withdrawn
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- Ultra-high pressure injection of the mix occurs as the rod is withdrawn, rotating about its axis.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)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/IT1989/000020 WO1990011412A1 (en) | 1989-03-22 | 1989-03-22 | A procedure for the forming of consolidation and foundation piles with embedded reinforcements |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0417111A1 true EP0417111A1 (de) | 1991-03-20 |
Family
ID=11331347
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19890904201 Withdrawn EP0417111A1 (de) | 1989-03-22 | 1989-03-22 | Verfahren zur herstellung von verfestigungs- und gründungspfählen mit eingebetteter bewehrung |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0417111A1 (de) |
WO (1) | WO1990011412A1 (de) |
Families Citing this family (8)
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)
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 (de) * | 1984-01-11 | 1990-07-25 | Stump Bohr GmbH | Verfahren und Vorrichtung zum Herstellen von Bauelementen im Baugrund, wie Pfählen, Injektionsankern, Schlitzwänden oder dergleichen |
GB2154630B (en) * | 1984-02-24 | 1986-09-17 | Matsuzawa Kiko Kabushiki Kaish | Construction method for foundation piling |
-
1989
- 1989-03-22 WO PCT/IT1989/000020 patent/WO1990011412A1/en not_active Application Discontinuation
- 1989-03-22 EP EP19890904201 patent/EP0417111A1/de not_active Withdrawn
Non-Patent Citations (1)
Title |
---|
See references of WO9011412A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO1990011412A1 (en) | 1990-10-04 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 19901206 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE DE FR GB NL SE |
|
17Q | First examination report despatched |
Effective date: 19920219 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 19921104 |