EP0411560B1 - Bodenverfestigungsgerät - Google Patents

Bodenverfestigungsgerät 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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EP19900114666
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English (en)
French (fr)
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EP0411560A2 (de
EP0411560A3 (en
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/de
Publication of EP0411560A3 publication Critical patent/EP0411560A3/en
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Publication of EP0411560B1 publication Critical patent/EP0411560B1/de
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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.

Claims (12)

  1. Bodenverfestigungsgerät, gebildet aus einer Einheit (26) zur Speicherung einer Verfestigungssubstanz; einem Strang (7; 108) welcher verschiebbar an einem im wesentlichen senkrechten Turm (5; 106) gehalten wird, wobei der Strang (7; 108) aus einer Vielzahl von rohrförmigen Abschnitten (9; 155) gebildet wird, welche der Länge nach wechselseitig so miteinander verbunden sind, daß sie mindestens zwei Leitungen (12, 13; 165, 169) bilden; und einem grabenden Mischwerkzeug (15; 113), das am unteren Ende des Stranges (7; 108) befestigt ist, wobei das Werkzeug (15; 113) aus unteren radialen Schaufeln (16; 188) und Öffnungen (19, 20; 183), die am Strang (7; 108) nahe den Schaufeln (16; 188) angeordnet sind, besteht, dadurch gekennzeichnet, daß die Einheit (26) aus einem Speicher (27) für die Verfestigungssubstanz, einem Luftkompressor (28) und einem Wasserbehälter (30) gebildet wird, daß die mindestens zwei im Strang (7; 108) angeordneten Leitungen (12, 13; 165, 169) aus einer Leitung (12; 165) für Wasser und einer von der ersten Leitung (12, 165) getrennten Leitung (13; 169) für die Verfestigungssubstanz und für Preßluft besteht, wobei die Leitungen (12, 13; 165, 169) von der Oberseite des Stranges (7; 108) dadurch Rohre (25, 29) gespeist werden, welche mit dem Wasserbehälter (30), mit dem Luftkompressor (28) und der Speichereinheit (26) verbunden sind, daß sich die Leitungen (12, 13; 165, 169) abwärts zum unteren Ende des Stranges (7; 108) erstrecken und daß die radialen Schaufeln (16; 188) des grabenden Mischwerkzeuges (15; 113) mit Grabezähnen (18; 189) versehen sind, daß die Öffnungen (19, 20; 183) des grabenden Mischwerkzeuges (15; 113) mit den Leitungen (12, 13; 165, 169) verbindbar sind, so daß während des Eindringens des Werkzeuges (15; 113) in den Boden wahlweise Wasser und Preßluft und, wenn eine erforderliche Tiefe erreicht wurde, eine Verfestigungssubstanz in den Boden eingeführt werden kann, und eine Pumpeinrichtung (31) für das Wasser an der Leitung (12; 165) angeschlossen wird, um die Menge des Wassers zu steuern und überschüssiges Wasser mittels des Rückflußrohres (32) in den Speicherbehälter (30) zurückzuführen.
  2. Gerät nach Anspruch 1, dadurch gekennzeichnet, daß jeder rohrförmige Abschnitt (155) aus einem Rohr (168) für den Transport der Verfestigungssubstanz und für Druckluft besteht, daß das Rohr (168) koaxial innerhalb eines polygonalen Rohres (156) angeordnet ist, daß die Leitung (165) zum Transport des Wassers in einer das Wasser abtrennenden Weise mit dem polygonalen Rohr (156) verbunden wird, daß der Strang (108) ein oberes Ende aufweist, welches in einem Lager (109), das entlang des Turmes (106) gefuhrt wird, drehbar gestützt ist und drehbare Kupplungen (130, 148, 149, 153) zur Verbindung mit den Versorgungsanschlüssen für Preßluft und Verfestigungssubstanz sowie Wasser aufweist, und daß der Strang (108) mit einem rotierenden Motorelement (111) in nach unten gerichteter Lage in für rotierende Bewegungen starrer, für axiale Bewegungen jedoch verschieblicher Weise verbunden ist.
  3. Gerät nach Anspruch 2, dadurch gekennzeichnet, daß jedes polygonale Rohr (156) ein an seinem oberen Ende angefügtes Kupplungs-Buchsenteil (157) enthält, daß die Kupplung (157) einen zylindrischen Sitz (158) und einen polygonalen Sitz (160) zur Aufnahme eines zylindrischen bzw. eines polygonalen Abschnittes (159, 161) eines Steckerelementes (137) eines benachbarten Abschnittes aufweist, daß das Rohr (168) einen zylindrischen Querschnitt aufweist und tangential in Kontakt mit der Innenseite des polygonalen Rohres (156) ist, daß die Leitung (169) für die Verfestigungssubstanz und für Druckluft koaxial im zylindrischen Rohr (168) angeordnet ist, daß die Leitung (169) für die Verfestigungssubstanz und für Druckluft in Ringen (171, 170) zentriert wird, welche in die Stecker- und Buchsenelemente (137, 157) eingefügt sind, und daß die Leitung (165) für das Wasser fest mit der Außenseite jedes polygonalen Rohres (156) verbunden ist und sich entlang der Mittellinie einer der Außenseiten erstreckt.
  4. Gerät nach einem der Ansprüche 2 oder 3, dadurch gekennzeichnet, daß eine Buchse (118) zur drehbaren Abstützung des Stranges (103) an dem Lager (109) befestigt ist, eine weitere Buchse (120) koaxial innerhalb der Buchse (118) angeordnet ist und mittels Drucklagern (121, 122) drehbar abgestützt wird, daß ein zylindrischer Körper (125) an der Oberseite der Buchse (118) zentriert und befestigt ist, daß der zylindrische Körper (125), einen unteren Sitz (129) bildet, in welchem sich die Oberseite der weiteren Buchse (120) abgedichtet dreht, daß das Gerät weiterhin, einen Zwischensitz (146) und einen oberen Sitz (147) enthält, in welchem sich der Endabschnitt eines Verbindungsrohres (134) abgedichtet dreht, daß das Verbindungsrohr (134) mit der Zuführung für Druckluft und Verfestigungssubstanz verbunden und koaxial zur Buchse (120) angeordnet ist und fest mit einer Kupplungsscheibe (133) für das Steckerelement (137) verbunden ist, daß sich eine ringförmige Kammer (135) zwischen der weiteren Buchse (120) und dem Verbindungsrohr (134) ausbildet, daß die Kammer (135) mit dem Wasserenschluß an einer Seite und mit der Leitung (165) für das Wasser an der anderen Seite verbunden ist, woran Öffnungen (150) zwischen dem mittleren Sitz (146) und dem oberen Sitz (147) vorgesehen sind, und die Öffnungen (150) direkt mit der Außenseite verbunden sind.
  5. Gerät nach einem der Ansprüche 2 bis 4, dadurch gekennzeichnet, daß das Motorelement (111) einen Kupplungsblock (195) enthält, welcher aus einem Drehschemelring (196), der den Strang (108) umgibt, und einem Paar von Flügelteilen (197), die an dem Drehschemelring (196) an der Außenseite des polygonalen Rohres (156) angeschweißt sind, besteht, wobei jedes der Flügelteile (197) eine entsprechende Walze (198) abstützt, welche tangential an der entsprechenden Außenfläche des polygonalen Rohres (156) angreift und eine der Walzen (198) eine ringförmige Ausnehmung (199) aufweist, die den Durchtritt der Leitung (165) für das Wasser ermöglicht.
  6. Gerät nach Anspruch 5, dadurch gekennzeichnet, daß die Walzen (198) gewölbt sind.
  7. Gerät nach einem der Ansprüche 5 und 6, dadurch gekennzeichnet, daß der Kupplungsblock (195) eine Platte (201) enthält, welche einen zylindrischen Sitz (202) für die drehbare Aufnahme der Abstreifringe (203) darstellt, welche den Strang (108) mit einem prismenartigen Eingriff umgeben.
  8. Gerät nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das grabende Mischwerkzeug (15; 113) ein rohrförmiges Element (17; 174, 175, 176) enthält, welches an seiner Oberseite ein Element (14; 173) zur Kopplung mit dem Strang (7; 108) enthält und an seiner Außenseite mit zwei Paaren von längsseitig versetzten, grabenden Schaufeln (16, 22; 184, 188) versehen ist und ein Schneidkopf (17a; 178) nach unten gerichtet an dem rohrförmigen Element (17, 174, 175, 176) befestigt ist.
  9. Gerät nach Anspruch 8, dadurch gekennzeichnet, daß der Schneidkopf (178) in abwärts gerichteter Position mit einem Strang (177) fest verbunden ist, welcher innen mit dem rohrförmigen Element (174, 175, 176) verrastet ist und welcher in nach oben gerichteter Position einen Becher (180) bildet, welcher mit der Leitung (169) für die Verfestigungssubstanz und für die Preßluft verbunden ist, und der Schneidkopf (178) Öffnungen (182) aufweist, welche durch unterhalb des oberen Schaufelpaares (184) angeordnete Düsen (183) mit der Außenseite verbunden sind.
  10. Gerät nach Anspruch 9, dadurch gekennzeichnet, daß die Schaufeln (184) in abwärts gerichteter Position Hohlräume (187) aufweisen, welche nach unten offen sind, und an denen die Düsen (183) angeordnet sind.
  11. Gerät nach einem oder mehreren der Ansprüche 2 bis 10, dadurch gekennzeichnet, daß das Lager (109) zur Abstützung des Stranges (108) durch ein Seil-Doppelsystem (204, 211), welches durch ein Paar von Hebezeugen (116, 115) bewegt werden kann, angehoben und abgesenkt werden kann, wobei die Seile zwei entsprechende Seilzüge bilden, deren eines Ende am Turm (106) und deren entgegengesetztes Ende am Lager (109) befestigt ist.
  12. Gerät nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß eine Haube (200) in abwärts gerichteter Position fest mit dem Motorelement (111) verbunden ist, daß die Haube das grabende Mischwerkzeug (113) überspannend angeordnet ist, daß das Motorelement (111) an einem weiteren Lager (193) befestigt ist und ein Schieber, welcher am Turm (106) geführt wird und durch fluidbetriebene Kolben (112) zwischen einer unteren Stellung, bei der das grabende Mischwerkzeug (113) abdeckt und auf dem Erdboden aufsitzt, und einer angehobenen Stellung, die eine Untersuchung des Werkzeuges (113) ermöglicht, bewegbar ist.
EP19900114666 1989-08-03 1990-07-31 Bodenverfestigungsgerät Expired - Lifetime EP0411560B1 (de)

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
IT00348890A IT1242644B (it) 1990-05-08 1990-05-08 Attrezzatura per attuare il consolidamento di terreni.
IT348890 1990-05-08

Publications (3)

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EP0411560A2 EP0411560A2 (de) 1991-02-06
EP0411560A3 EP0411560A3 (en) 1991-03-13
EP0411560B1 true EP0411560B1 (de) 1994-05-04

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EP19900114666 Expired - Lifetime EP0411560B1 (de) 1989-08-03 1990-07-31 Bodenverfestigungsgerät

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EP (1) EP0411560B1 (de)
DE (1) DE69008641T2 (de)
ES (1) ES2055835T3 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006014926A1 (en) * 2004-07-26 2006-02-09 Gunther Johan M Process to prepare in-situ pilings in clay soil
WO2007095123A2 (en) 2006-02-13 2007-08-23 Gunther Johan M In-situ pilings with consistent properties from top to bottom and minimal voids
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 (de) * 2010-06-11 2013-03-27 Bauer Spezialtiefbau GmbH Verfahren und Vorrichtung zum Herstellen von Wandlamellen im Boden

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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 (en) * 2004-07-26 2006-02-09 Gunther Johan M Process to prepare in-situ pilings in clay soil
US7090436B2 (en) * 2004-07-26 2006-08-15 Gunther Johan M Process to prepare in-situ pilings in clay soil
EP1771627A1 (de) * 2004-07-26 2007-04-11 Johan M. Gunther Verfahren zur herstellung von pfeilern in situ auf lehmboden
EP1771627A4 (de) * 2004-07-26 2009-04-15 Johan M Gunther Verfahren zur herstellung von pfeilern in situ auf lehmboden
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 (en) 2006-02-13 2007-08-23 Gunther Johan M In-situ pilings with consistent properties from top to bottom and minimal voids
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 (en) * 2006-02-13 2008-12-24 Johan M Gunther In-situ pilings with consistent properties from top to bottom and minimal voids
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
EP0411560A2 (de) 1991-02-06
EP0411560A3 (en) 1991-03-13
DE69008641D1 (de) 1994-06-09
DE69008641T2 (de) 1994-08-25
ES2055835T3 (es) 1994-09-01

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