EP0274947A2 - Verfahren und Vorrichtung zum Anbringen eines aus Teilchen und Bindemittel bestehenden verstärkten Bodens auf einer Fläche - Google Patents

Verfahren und Vorrichtung zum Anbringen eines aus Teilchen und Bindemittel bestehenden verstärkten Bodens auf einer Fläche Download PDF

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Publication number
EP0274947A2
EP0274947A2 EP87402838A EP87402838A EP0274947A2 EP 0274947 A2 EP0274947 A2 EP 0274947A2 EP 87402838 A EP87402838 A EP 87402838A EP 87402838 A EP87402838 A EP 87402838A EP 0274947 A2 EP0274947 A2 EP 0274947A2
Authority
EP
European Patent Office
Prior art keywords
binder
rotor
treated
particulate material
rain
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
Application number
EP87402838A
Other languages
English (en)
French (fr)
Other versions
EP0274947B1 (en
EP0274947A3 (de
Inventor
Hubert Perrier
Guy Morel
Edouard Gravouille
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.)
Laboratoire Central des Ponts et Chaussees
Original Assignee
Laboratoire Central des Ponts et Chaussees
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 Laboratoire Central des Ponts et Chaussees filed Critical Laboratoire Central des Ponts et Chaussees
Priority to AT87402838T priority Critical patent/ATE66268T1/de
Publication of EP0274947A2 publication Critical patent/EP0274947A2/de
Publication of EP0274947A3 publication Critical patent/EP0274947A3/de
Application granted granted Critical
Publication of EP0274947B1 publication Critical patent/EP0274947B1/fr
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
    • 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 the installation of a particulate material reinforced with a chemical or mechanical binder. More particularly, the invention relates to the treatment of a particulate soil layer in place with a view to strengthening it with a binder.
  • the mixing of the various constituents is generally carried out by kneading inside a chamber (or bell) of all the constituents.
  • Powdered binders or solid additives are generally spread on the floor to be spread out using a powerful machine with the floor in place to the desired thickness.
  • the liquid binders can be injected directly into the mixing chamber which ensures, in all cases, the homogenization of the mixture (cf. GB-A-1 415 524).
  • the object of the invention is to remedy the aforementioned drawbacks by proposing a method, as well as a device specially designed for its implementation, making it possible to treat the floors in particular with mechanical binders and to vary the binders introduced in a variable manner.
  • the object is achieved in accordance with the invention in that the particulate material is removed from a surface layer of the soils to be treated, in that one immediately projects said material taken in rain falling on the soil to be treated, and in that one introduces the binder into the rain of particulate material.
  • the binder can be a liquid, pulverulent or mechanical binder.
  • the raining of the particulate material requires its prior spraying according to a particle size which depends on the nature of the soil and the intended use. It is particularly advantageous for the spraying and spraying in the form of rain to be carried out practically simultaneously by spraying means consisting of a horizontal rotor with blades biting into the soil to be treated over the thickness of said surface layer, animated by a general movement of translation forward (substantially perpendicular to the axis of the rotor) and rejecting by projection towards the rear the material taken from said layer.
  • the binders are also dispersed, and projected into the rain of particulate material, by pneumatic, hydraulic or mechanical means.
  • the introduction and projection means are adapted to water, sprinkle or deliver the product over the entire surface supplied with finely sprayed soil.
  • blades can be provided on the rotor; but in general, blades constituted by substantially planar radial blades appear to be the most advantageous. In the case of treatment of loose soil, the system can be supplemented with claws.
  • the rotor advantageously cooperates with adjustable elements for confining the jet of material by the rotor: a shield limits the range of the jet, a deflector confines it upwards, while a shoe serves as a springboard for projecting the material.
  • a housing is provided above the rotor to avoid returning particles of material towards other organs of the device (in particular on the organs for distributing binders).
  • the blade rotor according to the invention can advantageously be integrated into existing soil stabilization machines in place, known under the name of sprayer-mixers, in which a tractor unit drives a rotating mixing rotor, at its engaged lower part. in the ground, in the direction of travel.
  • Such machines are marketed, for example, by the companies BOMAG, RAY GO, PETTIBONE, HOES and BROS.
  • the mixing rotor is generally equipped with numerous teeth.
  • the mixing rotor is replaced by a rotor with blades, and preferably with blades, rotating in the opposite direction to the rotor of the known machine, so as to project the material backwards and upwards, so that it falls back to rain on the ground.
  • the blades are continuous across the width of the rotor so as to project the material uniformly.
  • the angular speed is variable in order to control the jet of material. It can for example be from 0 to 450 revolutions / min, which, taking into account the diameter of the rotor in an exemplary embodiment, corresponds to tangential blade speeds of the order of 0 to 13 m / s.
  • the diameter of the rotor is approximately three times the thickness of the redeposited soil layer (this thickness being for example 15 cm).
  • the forward speed is variable, for example between 1.5 and 10 m / min.
  • the process and the device of the invention are suitable for conventional binders (a sauce is then sprayed: emulsion, hydraulic binder, organo-mineral binder, chemical binder, resin, etc.), they are very advantageously associated with the projection of 'continuous linear elements according to the teaching of document FR-A-2,572,449 which will be assumed to be known here.
  • the injection ramp of the continuous linear elements (wires) is driven by a transverse movement (in the axis of the ramp) and an angular oscillation (along the axis of the ramp) at frequencies close to the hertz, these movements having for object a homogeneous distribution of linear elements in interlocking patterns on the formation surface of the treated layer.
  • the continuous linear elements are unwound from coils supported by a creel driven in translation with the entire device.
  • the projection ramps for chemical or mechanical binders are arranged either inside and in extension of the shoe, or at the intersection of the shield and the deflector, or even outside the zone delimited by the bottom of the layer, the rotor, deflector and shield.
  • the binder can advantageously be prepared before it is sprayed, for example: lime or cement milk, beam or textile roll in a coating bath.
  • a vibration compacting device can be associated with the device of the invention.
  • an original characteristic of the invention the fact that the material removed falls in rain on the soil to be treated.
  • the material falls freely and without hindrance of any kind on the ground, so that the binder can be introduced within this rain and reach the ground itself without being hindered in its path, and therefore end up on the ground in a fully controlled form.
  • the entire redeposited layer is thus controlled, whether it is the form of the deposit, its dosage, its homogeneity or its desired heterogeneity (it is possible to choose to deposit a binder only over a given thickness of the redeposited soil layer).
  • This free fall in rain implies a transport, a displacement of the soil to be treated, to project said soil away from the sampling and projection organs: this is obtained by a sufficient speed of the rotor and an appropriate adjustment of the adjustable elements for confining the jet.
  • a soil sampling rotor which cooperates with a rotor stop to disaggregate the sampled material; this pulverized material then receives a liquid binder; but instead of falling back to rain on the ground, the material passes between the pallets of two rotor-pulverizers intended to shear, crush and even further disaggregate the material in order to ensure the coating of the particles with the conditioned binder, before their redeposition .
  • Such a process is incompatible with the aims of the invention: it only makes it possible to ensure a homogeneous distribution of a liquid binder in a particulate material, but no control of this distribution; heterogeneity is not allowed.
  • a process is manifestly incompatible with the distribution of a mechanical binder such as a continuous wire, which could not pass freely between the rotor-sprayers.
  • FIG. 1 shows a layer of soil 1 (sand, for example), a thickness e of which will be milled by the rotor 2 of axis 3, equipped with blades 4.
  • the rotor 2 is rotated about its axis 3 in the direction of the arrow w, and the assembly is driven in translation in the direction of the arrow V, which corresponds to the opposite direction of the peripheral speed of the rotor at the bottom so that the rotor digs the layer 1 and rejects the material taken backwards, forming the jet 5.
  • the frame supporting the rotor 2 also supports a deflector 6, a shield 7 and a shoe 8. It also supports an arm 9 on which the projection means 10 of the binder, for example wire 11 coming from a coil 12, are arranged.
  • the purpose of the deflector 6 and the shoe 8 is to better channel the sand discharged upwards and backwards by the rotor 2, while the shield 7 limits the range of said jet. It is advantageous that these elements are adjustable, to take into account the quality of the projected sand and the desired layer profiles.
  • the spoon blades favor, at low speed of rotation (100 and 200 rpm) shots of sand in a bell, a phenomenon which is accentuated with the increase in the speed of translation V (and therefore with l 'increase in the projected flow) taking into account the greater weight of each sand packet projected with little different kinetic energy.
  • a high tendency to segregation is noted for the high rotational speeds (400 rpm), also accentuated by a higher translational speed.
  • the deflector 6 cooperates with the shoe 8 to channel the path initial material.
  • the blades can be mounted on elastic means so as to partially retract in case a too large stone is caught between the rotor 2 and the shoe 8.
  • the sand 5 projected backwards and mixed with the binder from the means 10 falls back onto the ground 1 according to a profile 13 thickening from front to back until forming the complete layer 14.
  • the exact shape of the profile 13 is influenced by the positioning of the adjustable means 6,7,8: for example, a more abrupt inclination of the shield 7 results in a more brutal thickening of the profile 13 perpendicular to said shield.
  • Figure 2 shows a practical embodiment of the device according to the invention.
  • the rotor 2 is attached to the rear of a tractor 20, by means of a lifting frame 21.
  • the rotor 2 is housed between two lateral cheeks 22 to which are attached connecting pieces 23 carrying the hinge pin 24 of the shoe 8, the inclination of which is adjustable by means of fixing bars 25 in several positions.
  • the lifting frame 21 also supports bars 26, horizontal in the lowered working position, on which are fixed in adjustable manner in translation the deflector support 27 and the shield support 28 7.
  • the deflector 6 and the shield 7 are suspended to their respective supports 27,28 by adjustable joints 29,30.
  • the wire ejection means 10 are advantageously type which is described in document FR-A-2 572 449, and are supported by the bars 26 of the lifting frame 21.
  • the ejected wires come from coils arranged on a creel 31 supported by the towing vehicle 20: taking into account the quantity high wire necessary, it can be provided to install on the vehicle 20 several creels: for example two lateral creels 32 at the front and two lateral creels 31 at the rear.

Landscapes

  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Soil Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Agronomy & Crop Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Road Repair (AREA)
  • Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
  • Floor Finish (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
EP87402838A 1986-12-15 1987-12-14 Method and apparatus for depositing on a surface a reinforced floor composed of particulate matter and a binder Expired EP0274947B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87402838T ATE66268T1 (de) 1986-12-15 1987-12-23 Verfahren und vorrichtung zum anbringen eines aus teilchen und bindemittel bestehenden verstaerkten bodens auf einer flaeche.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8617514A FR2608183B1 (fr) 1986-12-15 1986-12-15 Procede et dispositif de mise en place sur une surface d'un sol renforce constitue d'elements particulaires et d'un liant
FR8617514 1986-12-15

Publications (3)

Publication Number Publication Date
EP0274947A2 true EP0274947A2 (de) 1988-07-20
EP0274947A3 EP0274947A3 (de) 1988-07-27
EP0274947B1 EP0274947B1 (en) 1991-08-14

Family

ID=9341895

Family Applications (2)

Application Number Title Priority Date Filing Date
EP87402838A Expired EP0274947B1 (en) 1986-12-15 1987-12-14 Method and apparatus for depositing on a surface a reinforced floor composed of particulate matter and a binder
EP88900378A Pending EP0294430A1 (de) 1986-12-15 1987-12-14 Verfahren und vorrichtung zum anbringen eines aus teilchen und bindemittel bestehenden verstärkten bodens auf einer fläche

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP88900378A Pending EP0294430A1 (de) 1986-12-15 1987-12-14 Verfahren und vorrichtung zum anbringen eines aus teilchen und bindemittel bestehenden verstärkten bodens auf einer fläche

Country Status (5)

Country Link
EP (2) EP0274947B1 (de)
JP (1) JPH01501958A (de)
AT (1) ATE66268T1 (de)
FR (1) FR2608183B1 (de)
WO (1) WO1988004709A1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2644490A1 (fr) * 1989-03-15 1990-09-21 Texsol Applic Procede et machine pour realiser des zones de terrains renforcees, constituees a partir d'un melange d'un materiau granulaire et de fils textiles
DE4303285A1 (de) * 1993-02-05 1994-08-11 Weiss Gmbh & Co Leonhard Verfahren zur tiefgründigen Bodenverfestigung und Einrichtung zur Durchführung
WO1994028248A1 (fr) * 1993-06-02 1994-12-08 Orgel Materiaux granuleux pour renforcement de sols et procede d'elaboration
FR2727703A1 (fr) * 1994-12-02 1996-06-07 Orgel Procede et dispositif de renforcement des sols par des additifs fibreux

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2662193B1 (fr) * 1990-05-21 1992-10-30 Colas Sa Dispositif d'epandage d'un materiau fluide, notamment d'une emulsion d'accrochage d'enrobes bitumineux et machine de construction de chaussees comportant un tel dispositif.
FR2665717B1 (fr) * 1990-08-08 1993-08-06 Colas Sa Dispositif d'epandage d'une substance fluide et machine permettant l'application simultanee de cette substance et du revetement d'une chaussee.
FI91984C (fi) * 1992-12-10 1994-09-12 Yit Yhtymae Oy Menetelmä maahan muodostettavan rakenteen vahvistamiseksi
CN110303036B (zh) * 2019-07-15 2020-03-27 山西省交通环境保护中心站（有限公司） 一种用于土壤治理过程中的穿刺松土设备

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2424459A (en) * 1943-12-13 1947-07-22 Harnischfeger Corp Ambulant soil treating apparatus
US3224347A (en) * 1963-04-22 1965-12-21 Harry J Seaman Soil processing machine
US3732023A (en) * 1969-03-11 1973-05-08 Metradon Ass Soil stabilization apparatus

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2644490A1 (fr) * 1989-03-15 1990-09-21 Texsol Applic Procede et machine pour realiser des zones de terrains renforcees, constituees a partir d'un melange d'un materiau granulaire et de fils textiles
DE4303285A1 (de) * 1993-02-05 1994-08-11 Weiss Gmbh & Co Leonhard Verfahren zur tiefgründigen Bodenverfestigung und Einrichtung zur Durchführung
WO1994028248A1 (fr) * 1993-06-02 1994-12-08 Orgel Materiaux granuleux pour renforcement de sols et procede d'elaboration
AU680003B2 (en) * 1993-06-02 1997-07-17 Orgel Granular materials and method of soil reinforcement
FR2727703A1 (fr) * 1994-12-02 1996-06-07 Orgel Procede et dispositif de renforcement des sols par des additifs fibreux
EP0716187A1 (de) * 1994-12-02 1996-06-12 Orgel Verfahren und Vorrichtung zum Verstärken von Boden durch faserförmige Additive
AU698936B2 (en) * 1994-12-02 1998-11-12 Orgel Method and device for reinforcing the ground using fibrous additives

Also Published As

Publication number Publication date
EP0274947B1 (en) 1991-08-14
EP0274947A3 (de) 1988-07-27
EP0294430A1 (de) 1988-12-14
FR2608183A1 (fr) 1988-06-17
WO1988004709A1 (fr) 1988-06-30
JPH01501958A (ja) 1989-07-06
FR2608183B1 (fr) 1989-04-28
ATE66268T1 (de) 1991-08-15

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