EP0723048A1 - Procédé et dispositif de renforcement des sols par des additifs fibreux - Google Patents

Procédé et dispositif de renforcement des sols par des additifs fibreux Download PDF

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Publication number
EP0723048A1
EP0723048A1 EP96400127A EP96400127A EP0723048A1 EP 0723048 A1 EP0723048 A1 EP 0723048A1 EP 96400127 A EP96400127 A EP 96400127A EP 96400127 A EP96400127 A EP 96400127A EP 0723048 A1 EP0723048 A1 EP 0723048A1
Authority
EP
European Patent Office
Prior art keywords
fibrous additives
materials
fibers
soil
fibrous
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Withdrawn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
EP96400127A
Other languages
German (de)
English (en)
French (fr)
Inventor
Claude Choudin
Jean-Marc Letalenet
Jean-Baptiste Rieunier
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.)
Orgel
Original Assignee
Orgel
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
Priority claimed from FR9500569A external-priority patent/FR2727704B3/fr
Application filed by Orgel filed Critical Orgel
Publication of EP0723048A1 publication Critical patent/EP0723048A1/fr
Withdrawn legal-status Critical Current

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    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C21/00—Apparatus or processes for surface soil stabilisation for road building or like purposes, e.g. mixing local aggregate with binder
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
    • E02D3/005—Soil-conditioning by mixing with fibrous materials, filaments, open mesh or the like

Definitions

  • the invention relates to techniques for reinforcing soils using fibrous additives and more particularly to a method and a device making it possible to introduce determined quantities of discrete fibers into soils loosened for this purpose and to mix them uniformly.
  • the invention sets itself the task of providing a simple method and device for introducing fibrous additives and adding them to the materials constituting a soil.
  • the invention sets itself the task of providing a complete method with all the elements allowing an implementation whose results are assured, in particular the stability of the rate of fibrous additives, which makes it possible to keep the level low with a good efficiency.
  • the present invention seeks to allow the use of cut and stored yarns, which therefore have to be extracted regularly from the stock and distributed uniformly.
  • Document FR-A-2 699 945 also discloses a technique for distributing fibrous additives on a road in which a box containing a certain volume of already cut fibers is installed at the rear of a truck whose container contains gravels.
  • the box containing the fibers ends in a chute which brings the fibers so that they mix with the flow of gravel at the exit of the box, at the entry of the chute a rotating roller is provided to allow the smooth flow of the cut fibers.
  • the invention proposes to provide a method and a device which make it possible to distribute and mix fibrous additives added to the materials of a soil and which do not have the drawbacks of the preceding systems.
  • the process uses fibrous additives which are reinforcing glass fibers in the form of bundles cut to a length of 3 to 500 mm.
  • the fiber bundles were cut at the place where they are produced, immediately after their constitution, before any winding operation.
  • the fibrous additives are glass or rock fibers obtained by centrifugation and packaged in the form of nodules by passage through a plate with holes. This preparation of the insulation fibers makes their implementation according to the process of the invention, easy.
  • the invention also relates to a technique for depositing a regular layer of fibrous additives on the ground, in which apparatuses are used intended to distribute pulverulent materials on roads, in particular those suitable for treating frozen roads with various powders. such as anti-freeze salts or anti-slip powders.
  • the fiber bundles are combined to form a mat, and it is this mat which is shredded and its fragments deposited on the ground or in the soil materials.
  • the invention also relates to a device for implementing the method, it comprises, for the deposition of fibrous additives, a salt spreader using a centrifugal force ejector.
  • the device of the invention uses simple and robust means which are therefore particularly reliable.
  • the process of the invention most often takes place in two stages, the first consists in depositing on the ground the fibrous additives in a regular layer then, the second, in distributing them regularly in the soil materials which are worked with a suitable machine that performs the same function as a simple plow.
  • FIG. 3 describes this last variant
  • FIG. 2 illustrates the first step of the first variant: distribution on the ground of the fibrous additives
  • FIGS. 4 and 5 the preparatory phase for this first step.
  • FIG. 1 a self-propelled machine is seen which comprises three essential elements, a distributor of fibrous additives 1, an extractor-sprayer roller 2 and finally, a compressor roller 3.
  • the fiber distributor 1 consists of two parts, the first, at the top is a fiber reservoir 4 which here contains bundles of filaments cut in son of reinforcing glass fibers (glass E), each yarn was 25 tex , the diameter of the constituent filaments was 11 ⁇ m, that is to say that each wire had 48 elementary filaments. The length of the beam sections was 12 mm.
  • a fiber reservoir 4 which here contains bundles of filaments cut in son of reinforcing glass fibers (glass E), each yarn was 25 tex , the diameter of the constituent filaments was 11 ⁇ m, that is to say that each wire had 48 elementary filaments.
  • the length of the beam sections was 12 mm.
  • an extractor device At the bottom of the fiber reservoir, at the level marked 5 in the figure is an extractor device. Such a device must fulfill two functions, extract the fibers while preventing them from jamming at the bottom of the tank and measure the flow of fibers.
  • the extractor-pulverizer 2 When the extractor-pulverizer 2 penetrates into the soil and turns it over, kneading it, it mixes at the same time, the fibers and the soil materials reduced to powder.
  • the amount of fiber that should be introduced depends on the improvement to be obtained. If it is a question of mechanical properties alone, if it is generally necessary to improve the lift, then very small quantities are sufficient. Excellent results are obtained with rates of between 0.01 and 0.10%.
  • the last operation carried out by the self-propelled machine of FIG. 1 is the rolling.
  • the steamroller 3 crushes the loosened materials and brings the ground level 8 to the height it had before the start of work in 9.
  • fibrous additives other materials, various binders or corrective sands, for example.
  • they will preferably be deposited on the ground in the same way as the fibers.
  • the self-propelled machine of FIG. 1 groups together in a single machine the devices which make it possible to carry out the two operations of the method of the invention: regular distribution of the fibers and mixing with the loosened soil materials.
  • the rolling carried out immediately completes the work. But it is obviously possible to carry out all these operations independently, each time with an appropriate machine.
  • FIG. 2 thus represents a centrifugal salt spreader.
  • a truck on which is placed a fiber tank 11 with below, its extractor - flow regulator 12. This feeds an inclined chute not shown which deposits the fibers on a horizontal disc 13 carried by a vertical axis and driven by a rapid rotational movement.
  • the flow rate of the extractor - flow regulator devices be adapted to the forward speed.
  • a wheel 15 makes it possible to directly drive the extractors or at least to record the forward speed so that the extraction is proportional to it. It is thus obtained that, whatever the speed of the truck, the quantity of fibrous additives distributed on the ground remains constant. The speed of rotation of the disk is adjusted in order to obtain the desired deposited width.
  • Figure 3 shows a different way of bringing cut fibers into the loosened soil materials. It differs in two respects from the methods already described, by the form in which the fibers are presented and by the mode of incorporation of the fibers.
  • the fibers are in the form of a glass mat, that is to say that the continuous or cut fibers are associated and linked to form a mat 17 which is packaged in the form of a roll 16.
  • the self-propelled machine of Figure 3 is equipped with a roller holder 18 supported by the front wheels 19.
  • the mast 17 is driven by the rollers 20 at a speed related to the forward speed of the vehicle. It is indeed the ratio between these two speeds which defines the concentration of the fibrous additives with respect to the soil materials.
  • the glass fiber mat described above insofar as it consists of cut fibers is deposited directly on the ground and that the devices intended to loosen the soil and / or to mix the fibrous additives work on the mat and incorporate its components where it is.
  • FIGS. 4 and 5 To facilitate the separation and the dosing of the fiber bundles, another device represented in FIGS. 4 and 5 was also used. It is a pneumatic decompression and transport device which is powered by a hopper 120 with the fibers.
  • the device such as that described in French patent 2,557,817 shown in FIG. 4 essentially comprises a feeder 127 preceding a carding machine 121 which feeds a valve sluice 122 and it comprises a turbine with controlled flow rate not shown which supplies the orifice 125 the air necessary for the transfer of fibers.
  • the fibrous materials can be introduced in bulk, for example using a silo located above the device.
  • the overlapping of the compressed fibers is important and this is why it has been found useful to replace the blades of the demoulder 127 with two different elements, on the one hand a cutting arm 128 ( FIG. 5 ) which serves as a knife and is capable of cutting.
  • the device of FIGS. 4 and 5 thus makes it possible to regularly supply a system for distributing fibrous additives such as the salt spreader of FIG . 2 .
  • the fiber flow rate is defined by the speed of rotation of the knives 127 in FIG. 4 and therefore of the sluice valve which performs the volumetric dosing.

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Civil Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Agronomy & Crop Science (AREA)
  • Architecture (AREA)
  • Soil Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • General Engineering & Computer Science (AREA)
  • Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
  • Soil Conditioners And Soil-Stabilizing Materials (AREA)
  • Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
EP96400127A 1995-01-19 1996-01-19 Procédé et dispositif de renforcement des sols par des additifs fibreux Withdrawn EP0723048A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9500569 1995-01-19
FR9500569A FR2727704B3 (fr) 1994-12-02 1995-01-19 Procede et dispositif de renforcement des sols par des additifs fibreux

Publications (1)

Publication Number Publication Date
EP0723048A1 true EP0723048A1 (fr) 1996-07-24

Family

ID=9475277

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96400127A Withdrawn EP0723048A1 (fr) 1995-01-19 1996-01-19 Procédé et dispositif de renforcement des sols par des additifs fibreux

Country Status (6)

Country Link
EP (1) EP0723048A1 (ja)
JP (1) JPH08232258A (ja)
AU (1) AU4099896A (ja)
BR (1) BR9600130A (ja)
CA (1) CA2167451A1 (ja)
IL (1) IL116806A0 (ja)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009104009A1 (en) * 2008-02-21 2009-08-27 Balfour Beatty Plc Suction recycling arrangement
FR2963365A1 (fr) * 2010-07-29 2012-02-03 Charier Procede d'elaboration d'une couche de materiaux compactes

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AUPR909101A0 (en) * 2001-11-26 2001-12-20 Gsa Bloodstock Pty Ltd Soil based material and method for producing same
JP2014510210A (ja) * 2011-03-14 2014-04-24 ロックウール・インターナショナル・アクティーゼルスカブ ストーンファイバーの使用法
JP2013221347A (ja) * 2012-04-18 2013-10-28 Nishimatsu Constr Co Ltd 地盤構造および地盤改良方法
JP6248424B2 (ja) * 2013-06-12 2017-12-20 株式会社大林組 地盤改良方法

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4167248A (en) * 1976-07-01 1979-09-11 Haluichi Akazawa Device for disentangling and spreading short steel fibers
GB2120475A (en) * 1982-10-05 1983-12-29 Frank Brian Mercer Strengthening a matrix
FR2557817A1 (fr) * 1984-01-06 1985-07-12 Saint Gobain Isover Soufflage de materiaux fibreux foisonnants
US4645381A (en) * 1980-03-19 1987-02-24 Etienne Leflaive Building material, its application for embankment, surfacing, or as foundation mass over a loose ground, and method and installation for the production of said material
FR2646186A1 (fr) * 1989-04-20 1990-10-26 Beugnet Sa Machine de traitement en place de materiaux, tels que des limons et des craies pour la construction d'une couche de fondation de chaussee notamment de chaussee d'autoroute
FR2699945A1 (fr) * 1992-12-24 1994-07-01 Ecotec Dispositif pour répandre un mélange gravillons/fibres et un liant sur un support.
FR2700507A1 (fr) * 1993-01-20 1994-07-22 Acometis Dispositif d'épandage, notamment, de sel, de semence, d'engrais et autre.
WO1994028248A1 (fr) * 1993-06-02 1994-12-08 Orgel Materiaux granuleux pour renforcement de sols et procede d'elaboration

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4167248A (en) * 1976-07-01 1979-09-11 Haluichi Akazawa Device for disentangling and spreading short steel fibers
US4645381A (en) * 1980-03-19 1987-02-24 Etienne Leflaive Building material, its application for embankment, surfacing, or as foundation mass over a loose ground, and method and installation for the production of said material
GB2120475A (en) * 1982-10-05 1983-12-29 Frank Brian Mercer Strengthening a matrix
FR2557817A1 (fr) * 1984-01-06 1985-07-12 Saint Gobain Isover Soufflage de materiaux fibreux foisonnants
FR2646186A1 (fr) * 1989-04-20 1990-10-26 Beugnet Sa Machine de traitement en place de materiaux, tels que des limons et des craies pour la construction d'une couche de fondation de chaussee notamment de chaussee d'autoroute
FR2699945A1 (fr) * 1992-12-24 1994-07-01 Ecotec Dispositif pour répandre un mélange gravillons/fibres et un liant sur un support.
FR2700507A1 (fr) * 1993-01-20 1994-07-22 Acometis Dispositif d'épandage, notamment, de sel, de semence, d'engrais et autre.
WO1994028248A1 (fr) * 1993-06-02 1994-12-08 Orgel Materiaux granuleux pour renforcement de sols et procede d'elaboration

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009104009A1 (en) * 2008-02-21 2009-08-27 Balfour Beatty Plc Suction recycling arrangement
FR2963365A1 (fr) * 2010-07-29 2012-02-03 Charier Procede d'elaboration d'une couche de materiaux compactes

Also Published As

Publication number Publication date
CA2167451A1 (fr) 1996-07-20
BR9600130A (pt) 1998-01-27
JPH08232258A (ja) 1996-09-10
AU4099896A (en) 1996-07-25
IL116806A0 (en) 1996-05-14

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