EP0411560B1 - Appareil pour consolider le sol - Google Patents

Appareil pour consolider le sol Download PDF

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Publication number
EP0411560B1
EP0411560B1 EP19900114666 EP90114666A EP0411560B1 EP 0411560 B1 EP0411560 B1 EP 0411560B1 EP 19900114666 EP19900114666 EP 19900114666 EP 90114666 A EP90114666 A EP 90114666A EP 0411560 B1 EP0411560 B1 EP 0411560B1
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EP
European Patent Office
Prior art keywords
shaft
tube
duct
water
disaggregation
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Application number
EP19900114666
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German (de)
English (en)
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EP0411560A3 (en
EP0411560A2 (fr
Inventor
Giuseppe Botto
Davide Trevisani
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Trevi SpA
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Trevi SpA
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Priority claimed from IT8903592A external-priority patent/IT8903592A0/it
Priority claimed from IT00348890A external-priority patent/IT1242644B/it
Application filed by Trevi SpA filed Critical Trevi SpA
Publication of EP0411560A2 publication Critical patent/EP0411560A2/fr
Publication of EP0411560A3 publication Critical patent/EP0411560A3/en
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Publication of EP0411560B1 publication Critical patent/EP0411560B1/fr
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    • 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
    • E02D3/12—Consolidating by placing solidifying or pore-filling substances in the soil
    • E02D3/126—Consolidating by placing solidifying or pore-filling substances in the soil and mixing by rotating blades

Definitions

  • the present invention relates to an apparatus for consolidating predominantly cohesive, soft and dry soil.
  • This consolidation method has the substantial disadvantage that a large amount of water is required for preparing the binary mixture and for setting with the soil on-site.
  • a device for soil stabilization by jetting a powdery stabilizing agent into the ground is known form US-A-4 606 675.
  • US-A-4 606 675 In order to achieve soil stabilization cement or an other stabilizing agent is supplied into the ground, while mixing and agitating the same with the soil for chemical solidification in-situ.
  • the known device of US-A-4 606 675 while working reliably as a soft soil mixer, fails to provide for a satisfactory solution for drilling and consolidating hard soils.
  • the device of US-A-4 606 675 also requires a large amount of water to achieve soil consolidation.
  • US-A-4 302 132 A method for injecting grout into the ground by using a rod with a single injection nozzle situated at the tip of the rod is disclosed by US-A-4 302 132. Two liquids of curable grout are mixed within a chamber (also situated at the tip of the rod) and ejected through the nozzle into the ground. However, the method of US-A-4 302 132 also proves, in a similar manner to the foregoing techniques, to be water consuming.
  • a simple earth drill having a single duct supplying only a concrete based agent is shown by DE-A-29 38 564.
  • the single duct opens at the top of the drilling shaft.
  • the consolidating effect achieved by the device of DE-A-29 38 564 is rather inefficient, inasmuch as there is no humidification of the soil.
  • the aim of the present invention is therefore to obviate the described disadvantages by providing an apparatus for consolidating soil which allows to overcome 25 such limitations imposed by the method hitherto used, due to its way of operating with the disaggregation tool, providing consolidations in predominantly cohesive, soft, dry soil or in soil which has dry intercalated layers or in cohesive soil in which the surface crust is insufficiently humidified to ensure hydration.
  • a further object of the invention is to provide an apparatus for performing the consolidating process which allots to introduce the consolidating agent and the amount of water required for hydration.
  • the apparatus is generally indicated by the reference numeral 1 and comprises a self-propelled tracked vehicle 2 provided with a control and operation cabin in which an operator is accommodated.
  • An arm 3 is frontally mounted on the vehicle 2, is supported by tension elements 4 and supports a tower 5.
  • the vertical elevation of the tower 5 is controlled by arms 6 which connect its lower end to the vehicle 2.
  • a shaft 7 is slidably and rotatably supported on the tower 5; during the operating steps, said shaft is actuated by means of a motorization unit 8 which is slidable along the tower 5.
  • the shaft 7 is composed of a plurality of individual tubular sections 9 which are mutually connected longitudinally.
  • the sections as can be seen in figure 2, are composed of an outer tube 10 inside which an inner tube 11 is arranged coaxially.
  • the ends of the section 9 are shaped so as to constitute couplings 11a, 11b which allow the axial connection of various sections.
  • the tubes 10, 11 thus define an outer duct 12 and an inner duct 13 which are mutually separated.
  • a disaggregation-mixing tool is rigidly associated with the lower end of the shaft 7 by means of a coupling 14.
  • the disaggregation tool comprises a pair of diametrically opposite lower blades 16 and a tubular element 17, which constitutes the central part of said tool and has a cutting head 17a at its lower end.
  • the blades 16 are tile-shaped and teeth 18, suitable for excavating and moving the soil, are rigidly associated with their lower edge. Said teeth are arranged tangentially with respect to the axis of rotation of the shaft 7. Holes 19 are defined below the blades 16 and are connected to the inner duct 13, whereas holes 20 are defined above the blades and are connected to the outer duct 12.
  • a pair of radial wings 21 is fixed on the element 17 above the blades 16, and their function is to keep the soil under agitation during the perforation step, as will become apparent hereinafter.
  • a further pair of blades 22 is arranged above the wings 21.
  • Said upper blades have the same structure as the blades 16, and holes 23, 24, respectively connected to the ducts 12, 13, are defined above and below them.
  • the inner duct 13 of the shaft 7 is fed from above, through the external tube 25, with the consolidating agent, in particular pulverized cement, by the unit 26 which is formed by a cement silo 27 and by an air compressor 28.
  • the outer duct 12 of the shaft 7 is fed, in an upward position, with water through the tube 29.
  • the water is drawn from a storage tank 30 by means of a pump 31 which sends the excess water of the hydration process back to the tank by means of a return tube 32.
  • the described apparatus operates in the following manner.
  • the disaggregation tool is placed on the region of the soil to be treated and the verticality of the tower is checked.
  • perforation of the soil begins with the preset rotation and advancement parameters, rotating the tool 15 with a rotation and advancement rate which is a function of the consistency of the soil.
  • the compressor 28 While the tool 15 penetrates into the soil, the compressor 28 initially sends air through the tube 25 and the duct 13. The air enters the soil through the holes 19 and 24, facilitating the penetration of the tool and keeping the duct 13 free.
  • the amount of pumped water must be such as to provide the necessary humidification of the dry layers being traversed and thus allow the subsequent hydration of the consolidating agent.
  • the feeding of the consolidating agent starts; said agent passes through the tube 25 and the inner duct 13 and enters the soil through the holes 19 and 24.
  • the lifting of the tool begins, reversing the direction of rotation.
  • the humidified soil is mixed with the pulverized cement, so that preset speed parameters, as a function of existing stoichiometric ratios, are respected in the lifting step as well.
  • the advantage of this process is that the amount of water used reacts entirely with the consolidating agent and therefore greater stability is given to the treated soil by leaving no free water in the soil or on the surface.
  • the reference numerals start from 101 to indicate a self-propelled tracked vehicle provided with a control and operation cabin 102 in which the operator is accommodated.
  • An arm 103 is articulately mounted frontally to the vehicle 101 and is supported by tension elements 104.
  • a slider 105 is mounted at the top of the arm 103 and slidably supports a tower 106.
  • the tower rests on the ground and is suspended from the slider 105 by means of a hydraulic jack 107.
  • By inclining the arm 103 by means of the tension elements 104 it is possible to position the tower 106 with respect to the vehicle 101, whereas by actuating the jack 107 it is possible to raise and lower the tower to allow the vehicle to move to a new work site or to allow the spacing of the tower with respect to the vehicle when the arm 103 is inclined outward.
  • a shaft, generally indicated by the reference numeral 108 extends frontally to the tower, i.e. on the opposite side with respect to the slider 105, and is rotatably suspended, with its upper end, from a ledge 109 which is guided on the tower 106.
  • the shaft 108 is guided, in a median position, within a guiding element 110 which is suspended from the ledge 109 by means of a cable (or chain) 110a and is also guided along the tower 106.
  • the shaft 108 is rotationally coupled, in a downward position, to a rotary motorization element 111 which can be raised and lowered by a certain extent by means of a pair of jacks 112 mounted to the sides of the tower 106.
  • the disaggregation-mixing tool is applied to the lower end of the shaft 108 below the motorization element 111.
  • the motorization element is guided along the tower 106 and is connected to the vehicle by a bridge 114 on which two winches 115, 116 are located; said winches, by means of a double cable system, raise or lower the ledge 109 with a closed-loop and synchronized traction and therefore raise or lower the shaft 108.
  • the ledge 109 is constituted by a plate 117 which is traversed by a sleeve 118 which is rigidly associated with the plate 117 by ribs 119.
  • a sleeve 120 is arranged coaxially inside the sleeve 118 and is rotatably supported by means of a pair of thrust bearings 121, 122.
  • the upper bearing 121 is retained between an internal shoulder of the sleeve 118 and a pair of rings 123 which are screwed on a threaded portion of the sleeve 120.
  • a cylindrical body 125 is centered on the top of the sleeve 118 and has a flange 126 which is traversed by bolts 127 which engage in a collar 128 of the sleeve for the mechanical coupling of the two parts 125, 118.
  • the cylindrical body 125 has a lower seat 129 in which the tapered end portion 131 of the sleeve 120 sealingly rotates by virtue of the interposition of a gasket 130.
  • the sleeve 120 has, in a downward position, a flange 132 which defines the seat for the bearing 122 and extends externally to the sleeve 118.
  • a disk 133 is centered on the flange 132 and centrally comprises a tube 134 which rises coaxially inside the sleeve 120 and delimits therewith an annular chamber or interspace 135.
  • the flange 136 of a male element 137 of a coupling of the shaft 108 is associated with the disk 133 in a downward position.
  • the disk 133 is secured between the flanges 132 and 136 by bolts 138.
  • Rubber rings 139, 140 ensure the necessary outward seal.
  • a cavity 141 is defined in the disk 133 and is connected, through passages 142, to the annular chamber 135.
  • a channel 143 extends from the cavity 141 and, by means of a connection 144 fitted in the flange 136, leads outward so as to connect to a duct 165 which is specified hereinafter.
  • the tube 134 extends upward beyond the tapered portion 131 of the sleeve 120 with a reduced-diameter portion 145 which sealingly rotates in two seats 146 and 147 of the cylindrical body 125 which are termed respectively intermediate seat and upper seat.
  • Sealing gaskets 148, 149 are interposed between the outer surface of the portion 145 and the seats 146, 147, whereas openings 150 are defined between the seats 146, 147 in the wall of the cylindrical body and directly connect to the outside the annular chamber comprised between the gaskets 148, 149 and the opposite walls of the cylinder 125 and of the portion 145 of the tube 134.
  • the tube 134 is connected to a supply of compressed air and to a supply of a consolidating agent (for example cement) by means of a stationary tube 151 which has a flange 152 bolted on the head of the cylindrical body 125.
  • a consolidating agent for example cement
  • the annular chamber 135 is connected to a water supply through a hole 154 defined radially in the body 125 between the lower seat 130 and the intermediate seat 146.
  • the shaft 108 which is to be connected to the male element 137, is constituted by a plurality of tubular sections 155, one of which is shown in figures 8 and 9.
  • Said section comprises an external tube 156 which has a square cross section with rounded corners; a female element 157, shaped complementarily with respect to the male element 137, is inserted at the top of said tube 156.
  • the female element 157 has a cavity in which a cylindrical seat 158 is defined for accommodating a cylindrical portion 159 of the male element 137 and a square seat 160 for receiving the square portion 161 of the male element 137.
  • a prismatic coupling is defined between the seat 160 and the portion 161 and allows the rotary coupling between the section 155 and the element 137
  • a hydraulic coupling is defined between the seat 158 and the portion 159 and is sealed by sealing rings 162.
  • semi-cylindrical grooves 163, 164 are defined in the inner and outer opposite walls of the seat 160 and respectively of the portion 161; when the elements 157 and 137 are inserted in one another, said grooves form holes for the accommodation of lugs which act as keys.
  • a duct 165 is welded externally to the tube 156 along a median line of a face and extends substantially along the entire length of the section 155.
  • the duct 165 is connected to the union 144 in an upward position with the addition of a sleeve 166, and is connected to the duct 165 of the subsequent sections in a downward position by means of further sleeves 167.
  • a cylindrical tube 168 is arranged in tangential contact inside the square tube 156, and a further coaxial tube 169 is arranged inside it.
  • Said tube 169 is centered, in an upward position, in a bush 170 which is inserted in the female element 157 and is centered, in a downward position, in a bush 171 which is inserted in a male element 172 which closes the section 155 downward.
  • the bushes 170, 171 are axially locked by Seeger rings 170a and 171a and are sealingly coupled in the respective seats by rubber rings 170b and 171b.
  • the male element 172 is fully similar to the male element 137 described above and is therefore shaped so as to mechanically and hydraulically couple to a successive female element.
  • the disaggregation-mixing tool 113 is associated with the end of the last of the sections 155 which compose the shaft 108 and comprises a tubular element which is provided, in an upward position, with a female coupling element 173 (see figures 12-14) suitable for coupling to a male element 172.
  • a sleeve 174 is rigidly associated with the element 173 and extends downward with a cylindrical jacket 175 in which a further sleeve 176 is centered.
  • a cylindrical shaft 177 is inserted in the sleeves 174 and 176, and the cutting head 178 is fixed to the lower end of said shaft.
  • the shaft 177 is keyed in the sleeve 176 by a through pin 179, whereas it defines, at the top, a cylindrical cup 180 which is open toward the cavity 181 of the element 173, with which it is connected by means of a bush 180a.
  • the bush 180a is retained by a Seeger ring 180b and is sealingly inserted in its seat by means of rubber rings 180C, so that when the male element 172 of the overlying section 155 is inserted in the cavity 182 a connection with the tube 169 is provided.
  • Two radial holes 182 extend from the cup 180 and traverse the wall of the sleeve 174; respective nozzles 183 are inserted in said holes.
  • a pair of blades 184 is welded to the sleeve 174; said blades are arranged diametrically and are inclined forward and downward with respect to a counterclockwise direction of rotation.
  • a plurality of disaggregation teeth 185 is welded on the front edge of the blades 184, and respective wings 186 are welded on the rear edge and delimit a cavity 187 which is open downward and at which the nozzles 183 are located.
  • a similar pair of blades 188 with teeth 189 is welded diametrically to the sleeve 176 but is angularly offset by 90 degrees with respect to the blades 184, so that the blades 184 and 188 form a cross in plan view.
  • the duct 165 is connected through a sleeve 167 to a tubular element 190 which is rigidly associated externally to the element 173 and ends with a nozzle 191 which is directed downward and is located at the level of the pair of upper blades 184.
  • the motorization or propulsion element 111 (see figure 10) comprises a slider 192 which is guided along the tower 106 and is movable by means of jacks 112.
  • An annular ledge 193 is protrudingly mounted on the slider 192 and a motor unit 194, which is axially traversed by the shaft 108, is applied thereto in an upward position.
  • the motor unit 194 which is not illustrated in detail since it is of a conventional hydraulically-operated type, comprises a traction block 195 which axially guides and exerts a traction on the shaft 108.
  • the traction block 195 is composed of a fifth wheel 196 (see figure 11) on which pairs of wings 197 are welded at the faces of the tube 156.
  • Each pair of wings 197 rotatably supports, by means of the interposition of bearings, a roller 198 which is slightly cambered at the center.
  • the roller 198 which is opposite to the duct 165, has a median groove 199 which allows the passage of said duct.
  • a dome 200 is rigidly associated with the ledge 193 in a downward position and encloses the disaggregation-mixing tool 113, with respect to which is can be raised and lowered when the slider 192 is actuated by the jack 112.
  • the top of the dome 200 is constituted by a plate 201 which defines a cylindrical seat 202 for the rotatable accommodation of two rings 203 which circumscribe the tube 156 with a prismatic engagement.
  • the rings 203 have the function of scraping any material which adheres to the walls of the shaft 108 when said shaft is caused to slide through the motorization unit 111.
  • a double cable system is provided for the lifting and lowering of the shaft 108 and can be actuated, as mentioned, by means of two winches 115, 116 which are mounted on the bridge 114.
  • the winch 116 acts on a cable 204 which is wrapped around a plurality of pulleys 205-210 and has its end connected to the tower 106.
  • the pulley 205 is rotatably supported on the slider 105, whereas the pulleys 206-208 are mounted at the top of the tower 106 and form a tackle with the pulleys 209-210 which are mounted on the ledge 109.
  • the winch 115 acts on the cable 211, the end whereof is connected to the base of the tower.
  • the cable 211 is wrapped around a pair of transmission pulleys 212, 213 and around two pairs of pulleys 214-217.
  • the pulleys 212, 213 are supported respectively on the slider 105 and at the lower end of the tower 106.
  • the pair of pulleys 214, 215 is mounted under the ledge 109 and forms a further tackle together with the pair of pulleys 216, 217 which is mounted at the lower end of the tower 106.
  • the described apparatus operates in the same manner as the preceding one, the only difference being that the compressed air, the humidification water and the consolidating agent are injected into the soil during the perforation and the rise of the tool, through the same nozzles 183.
  • a considerable advantage of the apparatus of figures 6-15 is the fact that the ducts for the water and air and for the consolidating agent remain constantly separated, so that there is no possibility of mixing the two flows. If wear should occur at the seals 148, 149, the bled fluid (water or air or consolidating agent) can flow directly outward through the openings 150 of the cylindrical body 125 and be detected by the assigned personnel.
  • the structure of the sections 155 and of the rotatable coupling, by means of which the ducts for water, air and consolidating agent are connected to stationary ducts, is particularly important.
  • the inner ducts 169 and 134 in case of wear, can in fact be easily replaced, since it is sufficient, for this purpose, to remove the disk 133 or the ring 171b in order to extract the tubes 134 or 169. It is similarly possible to remove cloggings in the region of the nozzles 183 by removing the pin 179 and then extracting the cylindrical shaft 177 from below.
  • a further advantage of the present invention is constituted by the dome 200, by virtue of which it is possible to prevent the dust produced when the disaggregation-mixing tool approaches the surface of the soil during its upward stroke from being scattered around with considerable disadvantages from the point of view of environmental impact.
  • the dome can be raised by means of the jacks 112 to allow, if required, inspection of the disaggregation-mixing tool 113.
  • the tube 156 provides, for the tube 156, a non-square cross section, for example a triangular or hexagonal or even circular one with outer longitudinal strips acting as keys.
  • the duct 165 is located inside the tube 156 at the chambers defined between the inner tube 168 and the tube 156.

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  • 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)
  • Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
  • Earth Drilling (AREA)
  • Shovels (AREA)

Claims (12)

  1. Appareil pour consolider le sol comprenant: un ensemble (26) pour stocker un agent de consolidation; un arbre (7; 108) qui est supporté en vue de son coulissement par une tour sensiblement verticale (5; 106), ledit arbre (7; 108) étant formé par une pluralité de sections tubulaires (9; 155) qui sont mutuellement raccordées dans le sens longitudinal afin de définir au moins deux conduites (12, 13; 165, 169); et un outil de désagrégation-mélange (15; 113) monté à l'extrémité inférieure de l'arbre (7, 108), ledit outil (15; 113) comprenant des lames radiales inférieures (16; 188), des orifices (19, 20; 183) étant définis sur ledit arbre (7; 108) à proximité des lames (16; 188), caractérisé en ce que l'ensemble (26) se compose d'un silo (27) pour l'agent de consolidation, d'un compresseur d'air (28) et d'un réservoir d'eau (30); en ce qu'aux moins deux desdites conduites (12, 13; 165, 169) définies dans ledit arbre (7; 108) comprennent une conduite (12, 165) pour l'eau et une conduite (13; 169) pour l'agent de consolidation et pour l'air comprimé, lesdites conduites (12, 13; 165, 169) étant alimentées depuis le sommet de l'arbre (7; 108) à travers les tubes (25, 29) qui sont raccordés au réservoir d'eau (30) et respectivement au compresseur d'air (28) et à l'ensemble de stockage (26), lesdites conduites (12, 13; 165, 169) s'étendant vers l'extrémité inférieure de l'arbre (7, 108); et en ce que lesdites lames radiales (16; 188) dudit outil de désagrégation-mélange (15; 113) sont pourvues de dents d'excavation (18; 189), lesdits orifices (19, 20; 183) dudit outil de désagrégation-mélange (15; 113) pouvant être raccordés auxdites conduites (12, 13; 165, 169) de manière à introduire, de manière sélective, dans le sol, de l'eau et de l'air comprimé pendant la pénétration dudit outil (15; 113), et un agent de consolidation lorsqu'une profondeur requise a été atteinte, des moyens formant pompes (31) étant placés au niveau de la conduite (12; 165) pour contrôler la quantité d'eau et renvoyer l'excès d'eau dans la cuve de stockage (30) au moyen d'un tube de retour (32).
  2. Appareil selon la revendication 1, caractérisé en ce que chaque section tubulaire (155) se compose d'un tube (168) prévu pour transporter l'agent de consolidation et l'air comprimé, ledit tube (168) étant placé de manière coaxiale à l'intérieur d'un tube polygonal (156), la conduite (165) prévue pour transporter l'eau étant associée d'une manière séparée, d'un point de vue hydraulique, audit tube polygonal (156), ledit arbre (108) ayant une extrémité supérieure qui est supportée, en vue de sa rotation, dans une corniche (109) qui est guidée le long de ladite tour (106) et comporte des accouplements rotatifs (130, 148, 149, 153) prévus pour être raccordés à l'alimentation en air comprimé et en agent de consolidation, ainsi qu'en eau, ledit arbre (108) étant couplé à un élément de motorisation rotatif (111) dans une position vers le bas qui est bloqué en rotation, mais peut coulisser dans le sens axial.
  3. Appareil selon la revendication 2, caractérisé en ce que chaque dit tube polygonal (156) comprend, inséré au niveau de son sommet, un élément femelle d'accouplement (157), ledit accouplement (157) comportant un siège cylindrique (158) et un siège polygonal (160) pour recevoir une partie cylindrique et respectivement une partie polygonale (159, 161) d'un élément mâle (137) d'une section contigüe, ledit tube (168) présentant une section transversale cylindrique et étant placé en contact tangentiel à l'intérieur dudit tube polygonal (156), ladite conduite (169) prévue pour l'agent de consolidation et l'air comprimé, étant placée de manière coaxiale dans ledit tube cylindrique (168), ladite conduite (169) prévue pour l'agent de consolidation et l'air comprimé étant centrée dans des anneaux (171, 170) qui sont insérés dans lesdits éléments mâle et femelle (137, 157), ladite conduite (165) prévue pour l'eau étant associée, de manière rigide, à l'extérieur, à chaque dit tube polygonal (156) et s'étendant le long d'une ligne médiane de l'une des faces.
  4. Appareil selon l'une quelconque des revendications 2 à 3, caractérisé en ce qu'un manchon (118) prévu pour le support, en vue de sa rotation, de l'arbre (108) est fixé sur la corniche (109), un autre manchon (120) étant placé de manière coaxiale à l'intérieur dudit manchon (118) et étant supporté, en vue de sa rotation, au moyen de paliers de butée (121, 122), un corps cylindrique (125) étant centré et fixé au sommet dudit manchon (118), ledit corps cylindrique (125) définissant un siège inférieur (129) dans lequel le sommet dudit autre manchon (120) tourne de manière étanche, ledit appareil comprenant en outre un siège intermédiaire (146) et un siège supérieur (147) dans lesquels tourne la partie terminale d'un tube de raccordement (134) de manière étanche, ledit tube de raccordement (134) étant raccordé à l'alimentation en air et en agent de consolidation, placé de manière coaxiale par rapport audit manchon (120) et associé de manière rigide à un disque d'accouplement (133) pour l'élément mâle (137), une chambre annulaire (135) étant définie entre ledit autre manchon (120) et ledit tube de raccordement (134), ladite chambre (135) étant raccordé à l'alimentation en eau d'un côté et à ladite conduite (165) prévue pour l'eau de l'autre côté, des ouvertures (150) étant prévues entre le siège intermédiaire (146) et le siège supérieur (147), lesdites ouvertures (150) étant directement raccordées à l'extérieur.
  5. Appareil selon l'une quelconque des revendications 2 à 4, caractérisé en ce que ledit élément de motorisation (111) comprend un bloc de traction (195) qui se compose d'une cinquième roue (196) qui encercle ledit arbre (108), des paires d'ailes (197) étant soudées sur ladite cinquième roue (196) au niveau des faces dudit tube polygonal (156), chacune desdites ailes (197) supportant un galet correspondant (198) qui se met en prise de manière tangentielle avec la face correspondante dudit tube polygonal (156), un desdits galets (198) comportant une rainure annulaire (199) pour permettre le passage de ladite canalisation (165) prévue pour l'eau.
  6. Appareil selon la revendication 5, caractérisé en ce que lesdits galets (198) sont bombés.
  7. Appareil selon l'une quelconque des revendications 5 à 6, caractérisé en ce que ledit bloc de traction (195) comprend une plaque (201) qui définit un siège cylindrique (202) pour recevoir en vue de leur rotation des ailes de râclage (203) qui encerclent ledit arbre (108) par une mise en prise de type prismatique.
  8. Appareil selon une ou plusieurs des revendications précédentes, caractérisé en ce que ledit outil de désagrégation-mélange (15; 113) comprend un élément tubulaire (17; 174, 175, 176) qui comporte, au niveau de son sommet, un élément (14; 173) pour assurer l'accouplement à l'arbre (7; 108) et est pourvu, à l'extérieur de deux paires de lames de désagrégation (16, 22; 184, 188) décalées dans le sens longitudinal, une tête de coupe (17a; 178) étant fixée dans une position vers le bas audit élément tubulaire (17; 174, 175, 176).
  9. Appareil selon la revendication 8, caractérisé en ce que ladite tête de coupe (178) est associée, de manière rigide, dans une position vers le bas, à un arbre (177) qui est claveté à l'intérieur dudit élément tubulaire (174, 175, 176) et définit, dans une position vers le haut, une coupelle (180) qui est raccordée à ladite conduite (169) prévue pour l'agent de consolidation et pour l'air comprimé, ladite tête de coupe (178) comportant des orifices (182) qui sont raccordés à l'extérieur au moyen de buses (183) placées au-dessous de la paire de lames supérieures.
  10. Appareil selon la revendication 9, caractérisé en ce que lesdites lames (184) définissent, dans une position vers le bas, des cavités (187) qui sont ouvertes vers le bas et au niveau desquelles sont placées lesdites buses (183).
  11. Appareil selon une ou plusieurs des revendications 2 à 10, caractérisé en ce que ladite corniche (109) prévue pour supporter l'arbre (108) peut être levée et abaissée au moyen d'un double système de câbles (204, 211) qui peut être actionné au moyen d'une paire de treuils (116, 115), lesdits câbles formant deux palans respectifs dont une extrémité est fixée à la tour (106) et l'extrémité opposée est fixée à ladite corniche (109).
  12. Appareil selon une ou plusieurs des revendications précédentes, caractérisé en ce qu'un dôme (200) est associé de manière rigide, dans une position vers le bas, audit élément de motorisation (111), ledit dome (200) pouvant être superposé sur ledit outil de désagrégation-mélange (113), ledit élément de motorisation (111) étant fixé sur une autre corniche (193) et une pièce coulissante (192) qui est guidée le long de ladite tour (106) et peut se déplacer au moyen de vérins actionnés par fluide (112), entre une position baissée pour recouvrir ledit outil de désagration-mélange (113) et reposant sur le sol, et une position levée permettant de contrôler ledit outil (113).
EP19900114666 1989-08-03 1990-07-31 Appareil pour consolider le sol Expired - Lifetime EP0411560B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
IT359289 1989-08-03
IT8903592A IT8903592A0 (it) 1989-08-03 1989-08-03 Procedimento per il consolidamento di terreni
IT348890 1990-05-08
IT00348890A IT1242644B (it) 1990-05-08 1990-05-08 Attrezzatura per attuare il consolidamento di terreni.

Publications (3)

Publication Number Publication Date
EP0411560A2 EP0411560A2 (fr) 1991-02-06
EP0411560A3 EP0411560A3 (en) 1991-03-13
EP0411560B1 true EP0411560B1 (fr) 1994-05-04

Family

ID=26325411

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900114666 Expired - Lifetime EP0411560B1 (fr) 1989-08-03 1990-07-31 Appareil pour consolider le sol

Country Status (3)

Country Link
EP (1) EP0411560B1 (fr)
DE (1) DE69008641T2 (fr)
ES (1) ES2055835T3 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006014926A1 (fr) * 2004-07-26 2006-02-09 Gunther Johan M Procede pour preparer des pilots de construction dans un sol argileux
WO2007095123A2 (fr) 2006-02-13 2007-08-23 Gunther Johan M pilotis in situ avec des propriétés cohérentes de haut en bas et des vides minimaux
CN107476774A (zh) * 2017-08-28 2017-12-15 中国葛洲坝集团基础工程有限公司 一种钻孔灌注施工过程中孔内埋钻的处理方法

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1246612B (it) * 1991-03-08 1994-11-24 Sicapi Italiana Spa Sistema ed impianto per consolidare colonne di terreno mediante la immissione forzata di elementi inerti anche granulari, principalmente sabbia o ghiaino, ed agenti consolidanti a secco.
SE469177B (sv) * 1991-07-18 1993-05-24 Bpa Bygg Ab Redskap foer infoerande av markstabiliserande aemne
ES2125116B1 (es) * 1992-01-28 1999-10-16 Sicapi Italiana Spa Instalacion para consolidar columnas de terreno mediante la introduccion forzada de elementos inertes
FI116632B (fi) * 1998-10-30 2006-01-13 Junttan Oy Menetelmä maan stabiloimiseksi ja laitteisto menetelmän soveltamiseksi
US6517292B1 (en) * 1999-09-01 2003-02-11 Richard E Landau Apparatus to form columns of granular material
ITTO20050503A1 (it) * 2005-07-22 2007-01-23 Soilmec Spa Dispositivo e metodo di miscellazione di terreno in sito per la formazione di muri o diaframmi sotterranei.
EP2395153B1 (fr) * 2010-06-11 2013-03-27 Bauer Spezialtiefbau GmbH Procédé et dispositif de fabrication de lamelles murales dans le sol

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1374705A (en) * 1971-05-11 1974-11-20 Linden Alimak Ab Implement for stabilising cohesive and friable earths
JPS5532849A (en) * 1978-08-30 1980-03-07 Sato Kogyo Kk Grouting method
DE2938564A1 (de) * 1979-09-24 1981-04-09 Sanwa Kizai K.K., Tokyo Erdbohrer
JPS60164509A (ja) * 1984-02-02 1985-08-27 Kobe Steel Ltd 粉体噴射撹拌地盤改良方法及び装置

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006014926A1 (fr) * 2004-07-26 2006-02-09 Gunther Johan M Procede pour preparer des pilots de construction dans un sol argileux
US7090436B2 (en) * 2004-07-26 2006-08-15 Gunther Johan M Process to prepare in-situ pilings in clay soil
EP1771627A1 (fr) * 2004-07-26 2007-04-11 Johan M. Gunther Procede pour preparer des pilots de construction dans un sol argileux
EP1771627A4 (fr) * 2004-07-26 2009-04-15 Johan M Gunther Procede pour preparer des pilots de construction dans un sol argileux
CN1973091B (zh) * 2004-07-26 2010-05-05 约翰·M·冈瑟 在粘土中制备原位桩的方法
WO2007095123A2 (fr) 2006-02-13 2007-08-23 Gunther Johan M pilotis in situ avec des propriétés cohérentes de haut en bas et des vides minimaux
US7341405B2 (en) 2006-02-13 2008-03-11 Gunther Johan M In-situ pilings with consistent properties from top to bottom and minimal voids
WO2007095123A3 (fr) * 2006-02-13 2008-12-24 Johan M Gunther pilotis in situ avec des propriétés cohérentes de haut en bas et des vides minimaux
CN107476774A (zh) * 2017-08-28 2017-12-15 中国葛洲坝集团基础工程有限公司 一种钻孔灌注施工过程中孔内埋钻的处理方法
CN107476774B (zh) * 2017-08-28 2019-10-25 中国葛洲坝集团市政工程有限公司 一种钻孔灌注施工过程中孔内埋钻的处理方法

Also Published As

Publication number Publication date
ES2055835T3 (es) 1994-09-01
DE69008641D1 (de) 1994-06-09
EP0411560A3 (en) 1991-03-13
DE69008641T2 (de) 1994-08-25
EP0411560A2 (fr) 1991-02-06

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