EP0382774A1 - Amelioration au procede de compactage-armature-injection ou de decompactage-drainage des sols par emploi de tubes auxiliaires. - Google Patents
Amelioration au procede de compactage-armature-injection ou de decompactage-drainage des sols par emploi de tubes auxiliaires.Info
- Publication number
- EP0382774A1 EP0382774A1 EP88909551A EP88909551A EP0382774A1 EP 0382774 A1 EP0382774 A1 EP 0382774A1 EP 88909551 A EP88909551 A EP 88909551A EP 88909551 A EP88909551 A EP 88909551A EP 0382774 A1 EP0382774 A1 EP 0382774A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tubes
- injection
- auxiliary
- tube
- tool
- 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
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
- E02D5/46—Concrete or concrete-like piles cast in position ; Apparatus for making same making in situ by forcing bonding agents into gravel fillings or the soil
-
- 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
-
- 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
- the present invention relates to the improvement of the process which is the subject of French patent of invention n ° 84-18690 of
- This process relates to the field of the treatment of soils, either with a view to their consolidation, or with a view to their sealing, or with a view to their drainage, or else with a view to a combination of these different effects.
- the process described in the principal patent application, makes it possible to obtain, by the process which is the subject of the invention, either a mechanically compacted soil, treated by injection and reinforced, or a loosened soil equipped with drains, or works linear such as micropiles, tie rods or others surrounded by compacted or unpacked soils.
- an equipment or a material filling is placed in the ground by the inside of the core of a tool with a tubular core, for example a hollow auger, this tool also allowing to execute a mechanical compaction or decompaction of the ground around the structure, the installation of a sheath around the equipment, the injection of soil under pressure around it and / or the creation of bulbs made of added material.
- a tool with a tubular core for example a hollow auger
- a number of possible combinations include, in addition to the installation of the equipment - from the inside of the core tubular of the tool, the installation of a filler material or a grout, either around the equipment to constitute a sheath or a bulb, or in the ground itself surrounding the structure, ⁇ to modify its compactness, resistance or sealing characteristics. It may especially be an injection of this ground under pressure using a grout.
- the introduction of the filler material or its injection is done either by the interior of the hollow core of the tool, or by means of an auxiliary tube. attached internally or externally to the tubular core of one out l.
- the object of the present improvement of the main invention is to provide provisions at the device or procedure level to improve this placement of material or this injection, in particular to allow injections with two or more constituents. injected through different conduits.
- the auxiliary tube or tubes are attached to the main tube of the tool, that is to say that they are integral with it.
- the fixing means can be welding, but any other fixing means, for example mechanical, can be used.
- the auxiliary tube or tubes are attached to the main tube of the tool according to Tune (or more) of its generators, interior or exterior.
- These tubes can also be joined to the main tube of the tool in another way.
- one or more tubes auxiliai- res may be joined to the main tube in a helix along the helical coil, for example at the base thereof, at its junction with the main pipe.
- auxiliary tube or tubes open near the base of the main tube. They can lead to:
- the auxiliary tube or tubes open through orifices directed towards the inside or towards the outside of the tube forming the core of the tool or towards the bottom, either directly or via a distribution ramp. They can also lead to different locations of the parts of the tool other than the tube forming its core, for example in the case of an auger, at different locations of the coil, for example along or near the lower cutting edge of the turn or elsewhere on the height of the turn itself, for example near the lateral edge thereof.
- the end of the tubes can be opened. It can also be fitted with valves with a single opening direction (non-return valves), for example mechanical or with compression of a compressible, rubber or other element.
- Such valves can be provided in other places of the auxiliary tubes, other than their ends.
- valves can be rubber cuffs opening under the effect of pressure, as on the cuff tubes of conventional injections.
- valves can be multiple along the auxiliary tubes and possibly calibrated at different opening pressures.
- the auxiliary tubes can be double, riple or multiple wall tubes for injection of different fluids, or independent multiple tubes opening into the same multi ⁇ ple nozzle.
- the main tube itself, forming the core of the tool can be a double, triple or multiple wall tube, supplying, via appropriate conduits, orifices or injection nozzles at various locations of the tool.
- the injection can be carried out not only at the base of the main tube forming the core of the tool, according to the main patent, but also at the right of the cylindrical volume of the terrain surrounding this main tube , by holes opening onto other parts of the tool, for example in the case of an auger, by holes opening at various distances from the axis along the turn, as mentioned in C.5. above. This improves the dispersion of the fluid injected inside this volume of land.
- Two or more different fluids can be injected, either through the central tube or through the auxiliary tube or tubes.
- the different fluids can be injected at the same level or at different levels. D.4. They can be injected either when the tool is lowered, or when it is raised, or in a combination of the two.
- the materials expelled if there are any, can possibly go up through the main tube of the tool or through Tun . auxiliary tubes.
- Figure 1 shows the lower end of a tool consisting of an auger (1) with tubular core (2), provided with two auxiliary tubes (3) and (4) fixed along the tube (2) forming its core. These two auxiliary tubes are provided in this case up to the base of the main tube (2) forming the core of the auger, then are extended by ends (5) and (6) fixed close to the edge. cutting (7) of the auger.
- the ends (5) and (6) comprise openings (8) provided for example with non-return valves for introduction or injection of one or more fluids into the ground.
- FIG. 2 represents an example of a single opening direction injection device mounted at the end of one of the auxiliary tubes, as mentioned in paragraph C.6. above.
- This device comprises a tubular base (9) closed on one side (10) and screwed on the other side (11) to the end (12) of the auxiliary tube.
- a compressible member (14) for example rubber, is compressed under the effect of the injection pressure (P ) inside the tubular base, which clears the opening of the openings (13) and allows the passage of the injected fluid
- Figure 3 shows an example of a simple temporary plug (15) in the wall (16) d 'an auxiliary tube, made of a compressible material, for example rubber.
- FIG. 4 represents the embodiment of a micropile or a pile with an enlarged base according to the method of the main patent improved by the provisions provided above.
- the drilling tool constituted by an auger with a tubular core (19)
- auxiliary tubes (20) and (21) fixed along the main tube (19) forming the core of the auger.
- These auxiliary tubes terminate at a certain distance above the end of the main tube by two extensions (22) and (23) fixed on the turn (24) of the auger until near the edge of this turn.
- two injection valves or two injection nozzles (25) and (26) are fixed at the end of these extensions.
- Simple injection valves for example those described in Figure 2, allow for a conventional injection.
- injection nozzles 1 can be carried out injections led to high pressure ( "jet grouting").
- filler material for example grout, mortar, concrete
- the outside diameter (d 1) of this enlarged bulb (28) will depend on the radius of action of the injection thus produced.
- the final bulb obtained therefore consists of two parts: a central part (27) made of filler material and an annular periphery part (28) in ground treated by injection directed by high pressure jet.
- the improvement in the lift of the pile or of the micropile provided by the increase in the outside diameter of the bulb thus obtained can be considerable, on the one hand because of the increase in diameter itself, on the other hand to because of the compression of the ground surrounding the bulb under the effect of the injection pressure.
- the injection of the volume of land (28) can be carried out either during the descent phase of the auger, or during the ascent phase, at the same time as the setting in place of the filler material, ie during the two phases.
- FIG. 5 represents the lower part of a micropile with an enlarged base, comprising at the base an enlarged bulb (27 + 28), of diameter (d 1) greater than the diameter (d) of the auger, produced according to the improved process. Above this bulb, a zone in compacted land (29) by mechanical action of the auger is produced according to the method of the main patent. A frame (30) can be put in place according to this method.
- FIG. 6 represents the lower part of a pile with an enlarged base according to the present improvement, comprising at its base a bulb (27 + 28) of diameter (d 1) greater than the diameter of the auger.
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)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8713829 | 1987-10-07 | ||
FR878713829A FR2621627B2 (fr) | 1984-12-07 | 1987-10-07 | Amelioration au procede de compactage-armature-injection et de decompactage-drainage des sols par emploi de tubes auxiliaires |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0382774A1 true EP0382774A1 (fr) | 1990-08-22 |
EP0382774B1 EP0382774B1 (fr) | 1991-11-27 |
Family
ID=9355588
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP88909551A Expired - Lifetime EP0382774B1 (fr) | 1987-10-07 | 1988-10-04 | Amelioration au procede de compactage-armature-injection ou de decompactage-drainage des sols par emploi de tubes auxiliaires |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0382774B1 (fr) |
JP (1) | JPH03500431A (fr) |
KR (1) | KR890701848A (fr) |
DE (1) | DE3866548D1 (fr) |
WO (1) | WO1989003458A1 (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0539630A1 (fr) * | 1991-10-31 | 1993-05-05 | Beheersmaatschappij Verstraeten B.V. | Méthode pour réaliser des pieux de fondation à base élargie dans le sol |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1340087A (fr) * | 1962-12-03 | 1963-10-11 | Entpr S H Courbot | Procédé de fabrication de pieu notamment pour fondation, ainsi que les pieux conformes à ceux obtenus par le présent procédé ou procédé similaire |
DE2231923A1 (de) * | 1972-06-29 | 1974-01-17 | Siemens Ag | Gruendungspfahl, insbesondere fuer fahr- und freileitungen |
FR2246181A5 (fr) * | 1973-10-02 | 1975-04-25 | Sefi | |
DE2431113A1 (de) * | 1974-06-28 | 1976-01-15 | Takechi Komusho Kk | Verfahren und vorrichtung zum einsetzen eines ankers |
FR2566813B1 (fr) * | 1984-06-29 | 1987-02-20 | Soletanche | Dispositif et procede pour la realisation de pieux en beton dans le sol et pieux obtenus par ce procede |
FR2569816B1 (fr) * | 1984-08-31 | 1987-12-04 | Soletanche | Dispositif comportant une valve pour l'injection de coulis autour d'un pieu tubulaire enfonce dans le sol |
FR2574442B1 (fr) * | 1984-12-07 | 1987-07-31 | Crambes Michel | Procede pour le compactage des terrains et la construction d'ouvrages dans le sol enrobes de terrain compacte ou decompacte |
-
1988
- 1988-10-04 EP EP88909551A patent/EP0382774B1/fr not_active Expired - Lifetime
- 1988-10-04 JP JP63508805A patent/JPH03500431A/ja active Pending
- 1988-10-04 DE DE8888909551T patent/DE3866548D1/de not_active Expired - Lifetime
- 1988-10-04 WO PCT/FR1988/000489 patent/WO1989003458A1/fr active IP Right Grant
-
1989
- 1989-10-04 KR KR1019890701017A patent/KR890701848A/ko not_active Application Discontinuation
Non-Patent Citations (1)
Title |
---|
See references of WO8903458A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO1989003458A1 (fr) | 1989-04-20 |
DE3866548D1 (de) | 1992-01-09 |
KR890701848A (ko) | 1989-12-22 |
JPH03500431A (ja) | 1991-01-31 |
EP0382774B1 (fr) | 1991-11-27 |
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