EP3172383B1 - Vorrichtung zur verankerung in mehrschichtigem boden mit verbindungsring - Google Patents

Vorrichtung zur verankerung in mehrschichtigem boden mit verbindungsring Download PDF

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Publication number
EP3172383B1
EP3172383B1 EP15741173.7A EP15741173A EP3172383B1 EP 3172383 B1 EP3172383 B1 EP 3172383B1 EP 15741173 A EP15741173 A EP 15741173A EP 3172383 B1 EP3172383 B1 EP 3172383B1
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EP
European Patent Office
Prior art keywords
end portion
hollow rod
connecting ring
casing tube
upper layer
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EP15741173.7A
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English (en)
French (fr)
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EP3172383A1 (de
Inventor
Christian Meline
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Industrielle de Produits Mecaniques Ancr'est Ste
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Industrielle de Produits Mecaniques Ancr'est Ste
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Publication of EP3172383A1 publication Critical patent/EP3172383A1/de
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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/74—Means for anchoring structural elements or bulkheads
    • E02D5/80—Ground anchors
    • E02D5/801—Ground anchors driven by screwing
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/74—Means for anchoring structural elements or bulkheads
    • E02D5/80—Ground anchors
    • E02D5/808—Ground anchors anchored by using exclusively a bonding material

Definitions

  • the present invention also relates to a method of setting up such an anchoring device.
  • a hollow rod provided with a cutter and extending into the lower layer, or second monolithic layer, and a casing tube extending around the hollow rod in the upper layer, or first layer of loose soil.
  • the casing tube comprises a plurality of force disks increasing the anchoring force of the device in the ground and positioned on the casing tube according to the ground breaking pressure limit to the right of each disk.
  • the hollow stem is first driven into the ground by means of its self-drilling cutting edge until it extends into the lower layer and then the casing tube is screwed into the upper layer around the hollow stem thanks to a penetration disc and the force discs, until the penetration disc bears on the lower layer.
  • each force disk is positioned and sized according to the ground breaking pressure limit to the right of each disk. It is therefore important that each disk is at the depth in the ground for which has been planned so as to fulfill its function optimally.
  • the precise positioning of the envelope tube can be made difficult. Indeed, the surface of the lower layer is often not perfectly flat and the depth of the lower layer can vary locally. Thus, even if depth measurements have been made, it may be that the position of the interface between the lower layer and the upper layer changes locally and varies in a range around the measurement made.
  • the anchoring device in the ground by injecting a sealing material, such as cement or resin into the hollow hollow rod, this material flowing into the ground from the ground. end of the hollow rod present in the lower layer and in the inner volume of the casing tube around the hollow rod.
  • a sealing material such as cement or resin
  • the injected material can leak in the upper layer between the internal volume of the envelope tube and the surface of the lower layer because the envelope tube does not take full support on the lower layer of the soil, which causes a loss of the injected material.
  • One of the aims of the invention is to overcome these disadvantages by proposing an anchoring device in the ground in which the exact positioning of the casing tube in the upper layer is guaranteed and to prevent leakage of sealing material.
  • the invention relates to an anchoring device of the aforementioned type, further comprising a connecting ring extending between the hollow rod and the second end portion of the casing tube, said ring providing a tight connection between said hollow rod. and said second end portion being intended to extend at the interface between the lower layer and the upper layer of the ground.
  • the connecting ring By positioning the connecting ring so that it extends at the interface between the upper layer and the lower layer of soil, it is possible to correctly position the jacket tube since it is put in place relative to at the position of the ring and not with respect to the exact position of the interface between the upper layer and the lower layer of soil.
  • the ring thus makes it possible to override the irregularity of the ground.
  • the ring ensures sealing between the hollow rod and the jacket tube at the interface between the upper layer and the lower layer. Thus, sealing material leaks can be avoided.
  • the terms “lower” and “upper” are defined relative to the direction of penetration of the anchoring device into the ground, i.e. the elements designated as lower extend to a depth larger than the elements designated as being higher.
  • the term “external” is defined by what is turned outward, that is, turned towards the ground when the anchoring device is fixed in the ground, and the term “internal” is defined by what is turned inwardly of the anchoring device, that is to say towards the axis A of the anchoring device.
  • the anchoring device 1 comprises a hollow rod 2 and a casing tube 4 forming two concentric cylindrical elements extending along an axis which is vertical when the anchoring device is installed in the ground.
  • Such an anchoring device is intended to be fixed in a multilayer floor formed of several layers of distinct compositions comprising at least one upper layer 6 and one lower layer 8 of different hardness.
  • the upper layer 6 is formed of a loose material, for example sediments, sand, chippings and more generally unconsolidated materials.
  • the upper layer 6 rests on the lower layer 8 which is formed for example of rocks, such as granite, limestone or hardened concrete and more generally monolithic or consolidated materials.
  • the lower layer 8 thus extends to a greater depth than the upper layer 6 and the surface of the lower layer forms the interface 10 between the upper layer 6 and the lower layer 8, as shown in particular on the Fig. 2 .
  • the hollow rod 2 comprises at least one metal section formed in one piece.
  • the hollow rod 2 is formed of several sections assembled to each other, for example by welding or otherwise.
  • the outer wall of the hollow rod 2 is for example threaded over its entire length.
  • the hollow rod 2 comprises a first end portion 12, or upper end portion with respect to the direction of penetration of the hollow rod 2 into the ground, and a second end portion 14 opposite, said lower end portion with respect to the direction of penetration of the stem in the soil.
  • the length of the hollow rod 2 measured along the axis A depends on the ground in which the anchoring device 1 is intended to be fixed, as will be described later.
  • the first end portion 12 is intended to receive attachment means, not shown, of a structure or a building to anchor in the ground.
  • the second end portion 14 is provided with a 16 self-drilling cutter welded or screwed on this end portion 14 and which has the rigidity characteristics necessary to be able to drill in a rock layer.
  • the diameter of the cutter 16 is greater than the outside diameter of the hollow rod 2.
  • the cutter 16 comprises for example at least one channel 18 placing the internal volume of the hollow rod 2 in fluid communication with the outside of the cutter 16.
  • the self-drilling cutter 16 is known per se and is for example a button cutter hardened steel or carbide or any other cut suitable for drilling in a rocky layer.
  • the casing tube 4 comprises at least one metal section formed in one piece.
  • the casing tube 4 is formed of several sections assembled to each other, for example by welding or otherwise.
  • the casing tube 4 comprises a first end portion 20, or upper end portion, and a second end portion 22, or lower end portion.
  • the casing tube 4 extends around the hollow rod 2 and has an inner diameter substantially equal to the diameter of the cutter and therefore greater than that of the hollow rod 2 so that a space 24 extends between the inner wall of the tube casing 4 and the outer wall of the hollow rod 2.
  • the diameter of the casing tube 4 is not constant and increases in the vicinity of the first end portion 20, the internal diameter of the second end portion 22 remaining substantially equal to the diameter of the cutter 16.
  • the first end portion 20 of the casing tube 4 extends in the vicinity of the first end portion 12 of the hollow rod 2 and the second end portion 22 of the casing tube 4 extends around a predetermined zone 25 of the hollow rod 2 located at a distance from the first end portion 12 of the hollow rod 2 substantially equal to the thickness of the upper layer 6 of the ground as will be described later.
  • the length of the casing tube 4 measured along the axis A depends on the floor in which the anchoring device is intended to be fixed, as will be described later.
  • the envelope tube 4 comprises, at its second end portion 22, a helical penetration disk 26 and, between its first end portion 20 and its second end portion 22, at least one helical stress disk 28.
  • the helical penetration disk 26 and the helical stress disk (s) 28 extend radially outwardly from the outer wall of the casing tube 4.
  • the number of helical stress disks 28 as well as their diameter depends on the ground in which the device anchoring is intended to be fixed, as will be described later.
  • the casing and the helicoidal disks 26 and 28 are for example made of reinforced steel and the disks are for example welded to the casing tube 4.
  • the envelope tube further comprises at its first end portion 20, a fixing plate 30 intended to rest on the ground, that is to say on the surface of the upper layer 6.
  • the first end portion 12 of the hollow rod 2 receives a complementary fixing plate 32 aimed on the hollow rod 2 so as to press the mounting plate 30 of the casing tube 4 against the ground.
  • the complementary mounting plate 32 is for example provided with at least one vent 34 placing the space 24, or internal volume of the casing tube 4, in fluid communication with the atmosphere.
  • the second end portion 22 is fixed to the predetermined zone 25 of the hollow rod 2 by means of a connecting ring 36 fixed on the one hand to the outer wall of the hollow rod 2 and on the other hand to the wall internal wall tube 4. Therefore, the connecting ring 36 comprises an inner wall 38 of a diameter substantially equal to the outer diameter of the hollow rod and an outer wall 40, at least a portion of which has a diameter substantially equal to internal diameter of the casing tube 4.
  • the connecting ring 36 is fixed permanently, for example by welding, on the predetermined zone 25 of the hollow rod 2, respectively in the second end portion 22 of the casing tube, and is received for example by plugging in the second end portion 22 of the casing tube, respectively on the predetermined zone 25 of the hollow rod 2.
  • the connecting ring 36 has a length, measured along the axis A, equal to at least twice have larger outer diameter, preferably at least four times are larger outer diameter.
  • the connecting ring 36 comprises a first zone 42, or upper zone, on which is fixed the second end portion 22 of the casing tube 4 and a second zone 44, or lower zone, extending the first zone 42 downwards and whose wall external 40 is left free, that is to say that the second zone 44 is not surrounded by the casing tube 4, as shown in the figures.
  • the connecting ring 36 is thus arranged to allow, in line with the first zone 42, a hermetic connection between the hollow rod 2 and the casing tube 4.
  • the connecting ring 36 comprises at least one channel 46 extending over the entire length of the connecting ring 36 in a direction parallel to the axis A between its inner wall 38 and its outer wall 40 of so as to place in fluid communication the space 24 with the volume surrounding the free portion of the hollow rod 2 extending from the second zone 44 of the connecting ring to the second end portion 14 of the hollow rod 2.
  • the connecting ring 36 comprises a plurality of channels 46 regularly distributed over the circumference of the connecting ring 36.
  • the connecting ring 36 has a constant outer diameter equal to the inner diameter of the second end portion 22 of the casing tube 4.
  • the first zone 42 and the second zone 44 has a constant diameter.
  • the second zone 44 has a diameter smaller than the diameter of the first zone 44, which is equal to the internal diameter of the second end portion 22 of the envelope tube 4.
  • the first zone 42 is connected to the second zone 44 by a junction zone 48 frustoconical and whose diameter decreases progressively from the diameter of the first zone 42 to the diameter of the second zone 44.
  • the connecting ring 36 comprises a radial shoulder 50 extending radially outwardly of the outer wall of the connecting ring 36 at the junction between the first zone 42 and the second zone 44 of the connecting ring. 36.
  • the shoulder 50 has an annular shape and comprises a first face 52, or upper face, on which rests the end of the second end portion 22 of the casing tube 4.
  • the shoulder 50 comprises a second face 54, or face lower, opposite the first face 52, and comprising drilling elements 56 for drilling the lower layer 8, as will be described later.
  • drilling elements 56 are for example formed by drilling plates.
  • the soil intended to receive the anchoring device comprises at least one upper layer 6 and one lower layer 8. It is however understood that the soil may comprise more than two layers of variable hardness and / or that the soil of the upper layer is not necessarily homogeneous.
  • the development and implementation of the anchoring device 1 begins with an analysis of the soil in which the anchoring device is to be fixed.
  • This analysis may be carried out by any appropriate means, such as coring or excavation, physical probing, by means of a pressuremeter or penetrometer, by electronic sounding using a multi-beam bathymetric sounder for upper layer 6 and by coring for the lower rock layer 8 for example.
  • This analysis aims at determining the thickness of the upper layer 6 and the depth of the interface 10 between the upper layer 6 and the lower layer 8, as well as the density of the upper layer 6 and the cohesion of the lower layer 8.
  • the length of the hollow rod 2 is determined to extend through the upper layer 6 and to penetrate into the lower layer 8 over a drilling depth determined by calculation according to the functions of the soil analysis including the cohesion of the lower layer.
  • the hollow rod 2 is provided to emerge from the ground over a predetermined length.
  • the diameter of the cutter 16 is also determined to form a cavity 58 in the lower layer 8 around the hollow rod 2, this cavity 58 being intended to be filled with sealing material as will be described later.
  • the diameter and the depth of the cavity 58 are chosen as a function of the coefficients of friction between the rock of the lower layer 8 and the sealing material which fills the cavity 58 and between the sealing material and the steel of the hollow rod 2 to provide an adequate sealing force depending on the nature of the soil and the structure to anchor in the ground.
  • the predetermined zone 25 of the hollow rod 2 is identified and selected to extend to the depth of the interface 10 between the lower layer 8 and the upper layer 6.
  • the connecting ring 36 is fixedly fixed to the hollow rod 2
  • the connecting ring 36 is fixed on the predetermined zone 25 and the length of the connecting ring 36 is chosen so that it extends with respect to the interface 10 and extends into the lower layer 8 and into the upper layer of the ground, as shown in FIGS. Fig. 2 , 3 , 5 and 7 .
  • the casing tube 4 is also made according to the soil analysis.
  • the casing tube 4 has a length substantially equal to the thickness of the upper layer 6 of the soil. More specifically, the length of the casing tube 4 is substantially equal to the depth, previously defined as mentioned above, to which the predetermined zone 25 of the hollow rod 2 must extend.
  • the number and dimensions of the helical force disks 28 are also determined. The number as well as the spacing of the helical stress disks 28 are chosen as a function of the thickness of the upper layer 6 as well as its density, the increase in the number of helical disks of effort 28 making it possible to increase the anchoring force of the anchoring device.
  • the diameter of the helical discs is chosen to prevent the recovery torques of forces are too important depending on the ground breaking pressure limit to the right of each disc.
  • the diameter of the discs is not necessarily constant.
  • the distance between two consecutive effort discs 28 is also determined as a function of the diameter of these discs. This distance is between two and five times the diameter of the disk and, advantageously, between three and four times this diameter.
  • the total or cumulative surface of the helical stress disks 28 determines the bearing capacity of the anchoring device 1 in the upper layer 6.
  • the diameter of the helical penetration disk 26 is, for its part, chosen to be equal to or less than the diameter of the helical stress disks 28 so that the helical stress disks can be in engagement with the corresponding layer of the ground.
  • the hollow rod 2 is put in place by screwing, for example using a roto-striker.
  • the hollow rod 2 passes through the upper layer 6 to the lower layer 8 which is pierced by the cutter 16 to the drilling depth determined by calculations. as previously described.
  • the cutter 16 forms a cavity 58 around the hollow rod 2, which has a diameter smaller than that of the cutter 16.
  • the dimensioning of the connecting ring 36 as well as its positioning in the predetermined zone 25 of the hollow rod 2 make the connecting ring closes the cavity 58 when the hollow rod 2 reaches the desired depth in the lower layer 8, as shown in FIGS. Fig. 2 and 3 . In this position, the first zone 42 of the connecting ring 36 extends in the upper layer 6 and the second zone 44 of the connecting ring 36 extends in the lower layer 8.
  • the casing tube 4 is then also put in place by screwing, for example using a roto-striker.
  • the casing tube 4 is screwed into the upper layer 6 by its helical penetration disc 26 and by its helicoidal stress disc (s) 28 around the hollow rod 2 until its second end portion 22 engages on the first region 42 of the connecting ring 36, as shown in FIGS. Fig. 2 and 3 .
  • the connecting ring 36 thus serves as a stop for fixing the casing tube 4 which is positioned in the upper layer 6 referenced with respect to the connecting ring 36. In this position, the casing tube 4 rests on the interface 10 between the upper layer 6 and the lower layer 8 and its fixing plate 30 rests on the surface of the upper layer 6. It should be noted that the locking of the casing tube 4 in this position can be improved thanks to the fixing plate supplementary 32 ( Fig. 6 ) which is screwed on the hollow rod 2 until it bears against the fixing plate 30.
  • a sealing material is injected into the hollow rod 2 by its first end portion 12.
  • a sealing material is for example cement or resin.
  • the sealing material flows in the hollow rod 2 to its second end portion 14 and is injected into the cavity 58 via the channel 18 provided in the cutting edge 16. It should be noted that instead of or in addition to a channel in the cutter, the flow could be through orifices provided in the second end portion 14 of the hollow rod.
  • the sealing material fills the cavity 58 and passes into the space 24 inside the casing tube 4 through the channel (s) 46 provided in the connecting ring 36.
  • the connecting ring 36 prevents leakage of sealing material.
  • the sealing material fills the casing tube 4 and exits outwards through the first end portion 20 of the casing tube 4 or through the vent 34 of the complementary fixing plate 32.
  • the anchoring device 1 is thus perfectly fixed in the ground and positioned optimally.
  • the method of setting up the anchoring device 1 is the same as that described above, by lowering the ring connection 36 along the hollow rod 2 during screwing of the casing tube 4 until the connecting ring enters the cavity 58 and that its second zone 42 extends into the cavity 58.
  • This step can be accompanied of an injection of pressurized water into the casing tube 4 so that this water under pressure is injected along the hollow rod 2 by the channel or channels 46 of the connecting ring 36 to release from this rod 2 the sediments which could have been deposited during the screwing of the hollow rod 2.
  • the connecting ring 36 When the connecting ring 36 is in accordance with the second embodiment shown on the Fig. 4 and 5 , the closing of the cavity 58 and the positioning of the connecting ring 36 is facilitated by the frustoconical shape of the junction zone 48 which abuts against the edge of the cavity 58, as shown in FIG. Fig. 5 .
  • This embodiment is particularly advantageous when the interface 10 between the upper layer 6 and the lower layer 8 has irregularities along the edge of the cavity 58, as shown in FIG. Fig. 5 . Indeed, in this case, it is ensured that the junction zone 48 is in contact with the entire edge of the cavity, even if this edge does not extend to a constant level, as shown in FIG. Fig. 5 .
  • the connecting ring 36 When the connecting ring 36 is in accordance with the third embodiment shown on the Fig. 6 and 7 the positioning of the casing tube 4 is even more precise since its end abuts against the shoulder 50 of the connecting ring 36 and not against the interface 10 between the upper layer 6 and the lower layer 8, as shown in FIG. Fig. 7 . Thus, the possible irregularities of this interface 10 are completely overcome.
  • the depth of the connecting ring 36 can moreover be perfectly adjusted since the connecting ring 36 is able to drill the layer. lower 8 by its drilling elements 56. This improves the anchoring of the connecting ring 36 in the ground and makes the positioning of the reinforcing tube 4 independent of the exact position of the interface 10.
  • the anchoring device combining the anchoring characteristics by drilling and screwing, makes it possible to take into account, in a single device, all the anchoring forces, namely the extraction forces. and attachment on the one hand, and compression and buckling on the other.
  • This anchoring device is suitable for soils having a rocky layer of hardness varying from friable to very hard, located one or more meters deep.
  • the anchoring device described above is particularly advantageous when it is used in a soil comprising as bottom layer 8 a layer of rock of magmatic or sedimentary origin and as upper layer 6 a sedimentary layer of variable hardness.
  • the anchoring force of the anchoring device results from the addition of the sealing forces of the hollow rod 2 in the lower layer 8 by means of the sealing material and the lift forces due to the helical disks. 28 in the upper layer 6.
  • the connecting ring ensures a certain sealing of the anchoring device by avoiding leakage of the sealing material in the upper layer, as described above. This certain seal can be identified when the pressure of the sealing material injected at the end of the injection operation of the sealing material is equal to the pressure at which this material has been injected. Such verification makes it possible to ensure the proper installation of the anchoring device in the ground.

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Piles And Underground Anchors (AREA)

Claims (11)

  1. Vorrichtung zum Verankern (1) in einem mehrschichtigen Boden, der mindestens eine obere Schicht (6) und eine untere Schicht (8) aufweist, wobei die Schichten (6, 8) unterschiedliche Härten haben, wobei die Vorrichtungen mindestens zwei zylinderförmige und konzentrische Elemente aufweist:
    - einen hohlen Schaft (2), aufweisend mindestens einen Abschnitt, der vorgesehen ist, um sich in der oberen Schicht (6) und in einem Teil der unteren Schicht (8) zu erstrecken, wobei der hohle Schaft (2) einen ersten Endabschnitt (12), der mit Befestigungsmitteln versehen ist, und einen zweiten dem ersten Endabschnitt (12) entgegengesetzten Endabschnitt (14) aufweist, der mit einer Schneide (16) ausgestattet ist,
    - ein Mantelrohr (4), aufweisend mindestens einen Abschnitt, der sich um einen Teil des hohlen Schaftes (2) herum erstreckt und vorgesehen ist, um sich in der oberen Schicht (6) zu erstrecken, aufweisend einen ersten Endabschnitt (20), der sich benachbart zu dem ersten Endabschnitt (12) des hohlen Schaftes (2) erstreckt, und einen dem ersten Endabschnitt (20) entgegengesetzten zweiten Endabschnitt (22), der mit einer schraubenförmigen Eindringscheibe (26) versehen ist, wobei das Mantelrohr (4) zwischen dem ersten und dem zweiten Endabschnitt (20, 22) mindestens eine schraubenförmige Kraftscheibe (28) aufweist,
    wobei die Vorrichtung dadurch gekennzeichnet ist, dass sie ferner einen Verbindungsring (36) aufweist, der sich zwischen dem hohlen Schaft (2) und dem zweiten Endabschnitt (22) des Mantelrohres (4) erstreckt, wobei der Ring (36) eine dichte Verbindung zwischen dem hohlen Schaft (2) und dem zweiten Endabschnitt (22) sicherstellt und vorgesehen ist, um sich an der Grenzfläche (10) zwischen der unteren Schicht (8) und der oberen Schicht (6) des Bodens zu erstrecken.
  2. Verankerungsvorrichtung gemäß Anspruch 1, dadurch gekennzeichnet, dass der Verbindungsring (36) an dem hohlen Schaft (2) befestigt ist, wobei der zweite Endabschnitt (22) des Mantelrohres (4) auf hermetische Weise auf den Ring (36) gepasst ist.
  3. Verankerungsvorrichtung gemäß Anspruch 1, dadurch gekennzeichnet, dass der Verbindungsring (36) in dem zweiten Endabschnitt (22) des Mantelrohres (4) befestigt ist, wobei der Verbindungsring (36) auf hermetische Weise auf den hohlen Schaft (2) gepasst ist.
  4. Verankerungsvorrichtung gemäß irgendeinem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass der Verbindungsring (36) mindestens einen Kanal (46) aufweist, der den Verbindungsring (36) entlang einer Richtung im Wesentlichen parallel zu der Achse (A) des hohlen Schaftes (2) und des Mantelrohres (4) durchquert, wobei der Kanal (46) das Innenvolumen des Mantelrohres (4) und das Volumen, das sich um den zweiten Endabschnitt (14) des hohlen Schaftes (2) herum erstreckt, in Fluidkommunikation bringt.
  5. Verankerungsvorrichtung gemäß irgendeinem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass der Verbindungsring (36) einen ersten Bereich (42) mit einem ersten Außendurchmesser, der vorgesehen ist, um sich in der oberen Schicht (6) zu erstrecken, und einen zweiten Bereich (44) mit einem zweiten Außendurchmesser, der vorgesehen ist, um sich in der unteren Schicht (8) zu erstrecken, aufweist, wobei der erste Außendurchmesser größer als der zweite Außendurchmesser ist, wobei sich der zweite Endabschnitt (22) des Mantelrohres (4) über den ersten Bereich (42) des Verbindungsrings (36) erstreckt.
  6. Verankerungsvorrichtung gemäß Anspruch 5, dadurch gekennzeichnet, dass der Verbindungsring (36) einen Verbindungsbereich (48) aufweist, der sich zwischen dem ersten Bereich (42) und dem zweiten Bereich (44) erstreckt, wobei der Verbindungsbereich (48) einen vom ersten Durchmesser zum zweiten Durchmesser abnehmenden Durchmesser aufweist, wobei der Verbindungsbereich (48) vorgesehen ist, um sich an der Grenzfläche (10) zwischen der unteren Schicht (8) und der oberen Schicht (6) des Bodens zu erstrecken.
  7. Verankerungsvorrichtung gemäß irgendeinem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass der Verbindungsring (36) einen radialen Ansatz (50) aufweist, der sich um den Ring (36) herum erstreckt, wobei das Ende des zweiten Endabschnitts (22) des Mantelrohres (4) auf dem Ansatz (50) liegt.
  8. Verankerungsvorrichtung gemäß Anspruch 7, dadurch gekennzeichnet, dass der Ansatz (50) eine erste Seite (52), auf der das Ende des zweiten Endabschnitts (22) des Mantelrohres (4) liegt, und eine zweite Seite (54) aufweist, die der ersten Seite (52) entgegengesetzt ist, wobei die zweite Seite mit Bohrelementen (56) versehen ist.
  9. Verfahren zum Einsetzen einer Verankerungsvorrichtung (1) gemäß irgendeinem der Ansprüche 1 bis 8 in einem mehrschichtigen Boden, der mindestens eine obere Schicht (6) und eine untere Schicht (8) aufweist, wobei die Schichten (6, 8) unterschiedliche Härten haben, wobei das Verfahren die folgenden Schritte aufweist:
    - Ermitteln der Dicke der oberen Schicht (6) und der Tiefe der unteren Schicht (8),
    - Bereitstellen eines hohlen Schaftes (2) mit einer Länge, die größer als die Dicke der oberen Schicht (6) ist, und Eintreiben des hohlen Schaftes (2) in den Boden mithilfe der Schneide (16), so, dass dieser die obere Schicht (6) durchquert und sein erster Endabschnitt (14) in die untere Schicht (8) eindringt,
    - Bereitstellen eines Mantelrohres (4) mit einer Länge, die im Wesentlichen gleich der Dicke der oberen Schicht (6) ist, und Eintreiben des Mantelrohres (4) in den Boden mithilfe der schraubenförmigen Eindringscheibe (26) bis zu der Grenzfläche (10) zwischen der oberen Schicht (6) und der unteren Schicht (8),
    dadurch gekennzeichnet, dass der Verbindungsring (36) mit einer derartigen Länge auf dem hohlen Schaft (2) positioniert ist, dass sich der Verbindungsring (36) zu der Grenzfläche (10) zwischen der oberen Schicht (6) und der unteren Schicht (8) erstreckt.
  10. Verfahren zum Einsetzen gemäß Anspruch 9 unter Verwendung einer Verankerungsvorrichtung gemäß Anspruch 4, dadurch gekennzeichnet, dass es einen Versiegelungsschritt aufweist, bei dem ein Versiegelungsmaterial durch seinen ersten Endabschnitt (12) hindurch in den hohlen Schaft (2) eingespritzt wird, wobei das Material durch den zweiten Endabschnitt (14) des hohlen Schaftes (2) in das Volumen um den zweiten Endabschnitt (14) des hohlen Schaftes (2) herum und in das Innenvolumen des Mantelrohres (4) strömt, wobei es den Kanal (46) des Verbindungsrings (36) durchquert, um ein Versiegeln der Verankerungsvorrichtung im Boden sicherzustellen.
  11. Verfahren zum Einsetzen gemäß Anspruch 10, dadurch gekennzeichnet, dass die untere Schicht (8) eine Felsschicht magmatischen oder sedimentären Ursprungs ist, und dass die obere Schicht (6) eine Sedimentschicht ist, so dass sich die Verankerungskraft der Verankerungsvorrichtung (1) aus der Summe der Versiegelungskräfte des hohlen Schaftes (2) in der Felsschicht und der Tragfähigkeitskräfte der schraubenförmigen Scheiben des Mantelrohres (4) in der Sedimentschicht ergibt, wobei der Verbindungsring (16) ein sicheres Versiegeln in der Felsschicht sicherstellt.
EP15741173.7A 2014-07-21 2015-07-21 Vorrichtung zur verankerung in mehrschichtigem boden mit verbindungsring Active EP3172383B1 (de)

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FR1457035A FR3023857B1 (fr) 2014-07-21 2014-07-21 Dispositif d'ancrage dans un sol multicouches comprenant une bague de liaison
PCT/EP2015/066678 WO2016012463A1 (fr) 2014-07-21 2015-07-21 Dispositif d'ancrage dans un sol multicouches comprenant une bague de liaison

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WO2016012463A1 (fr) 2016-01-28
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ES2704483T3 (es) 2019-03-18
FR3023857B1 (fr) 2016-08-26

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