EP2241677B1 - Dispositif pour la consolidation d'un sol - Google Patents

Dispositif pour la consolidation d'un sol Download PDF

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Publication number
EP2241677B1
EP2241677B1 EP20100159117 EP10159117A EP2241677B1 EP 2241677 B1 EP2241677 B1 EP 2241677B1 EP 20100159117 EP20100159117 EP 20100159117 EP 10159117 A EP10159117 A EP 10159117A EP 2241677 B1 EP2241677 B1 EP 2241677B1
Authority
EP
European Patent Office
Prior art keywords
caisson
door
hopper
ground
inert materials
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP20100159117
Other languages
German (de)
English (en)
Other versions
EP2241677A2 (fr
EP2241677A3 (fr
Inventor
Alessandro Ditillo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Soilmec SpA
Original Assignee
Soilmec SpA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Soilmec SpA filed Critical Soilmec SpA
Publication of EP2241677A2 publication Critical patent/EP2241677A2/fr
Publication of EP2241677A3 publication Critical patent/EP2241677A3/fr
Application granted granted Critical
Publication of EP2241677B1 publication Critical patent/EP2241677B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
    • E02D3/02—Improving by compacting
    • E02D3/08—Improving by compacting by inserting stones or lost bodies, e.g. compaction piles
    • 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
    • E02D5/66—Mould-pipes or other moulds
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
    • E02D7/02—Placing by driving
    • E02D7/06—Power-driven drivers
    • E02D7/14—Components for drivers inasmuch as not specially for a specific driver construction
    • E02D7/16—Scaffolds or supports for drivers
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
    • E02D7/18—Placing by vibrating

Definitions

  • the present invention is inserted into the field of technologies of ground compaction by means of compaction and in particular refers to a device for the supply of inert materials to vibrating systems for ground compaction.
  • ground compaction through induced vibration can be carried out by means of vibrating systems for ground compaction operating on one or more holes in the ground.
  • the compaction of sandy-gravel soils requires the use of systems operating at low frequency, whose action produces the better possible grade of self-thickening. This is due to the fact that the typologies of granulated soils, subject to vibration, tend to self-thicken.
  • the system can be hanging from a cableway exavator or directed along a mast (guiding tower).
  • Both the piling and the ground compaction are favored by water jets adjustable in flow rate and pressure, whose supplying is carried out through pumps and dedicated lines within the system itself.
  • the compaction is carried out from the bottom upwards, with fixed rising intervals and treatment times.
  • the filling ground also known as carried inert material, is inserted by the opening of the hole (generally with a conical opening) with the aid of operator means, such as gummed blades.
  • operator means such as gummed blades.
  • the final result of the treatment depends on the right choice of the compaction system, adapted to the type of ground present in the place of operation.
  • the vibration produces a settlement of the granules composing the ground after which these arrange themselves in a thicker layer.
  • the radium of vibro-compaction reachable starting from the axis of the hole depends on the ground, on the compaction system used and on the procedure chosen. In some types of ground and for elevated treatment intensity it is possible to see reductions of the deposit volume up to 10%.
  • the action of a thrusting winch causes an optimal compaction of the column and an in-depth extension of the thickening further than the maximum reached depth.
  • the column of compacted inert material within the hole in the ground is then formed by subsequent steps of extraction, output and compression of the inert materials both downwards and laterally in the ground. In this way columnar elements which, by interacting with the ground, support the loads, can be obtained.
  • This last technique provides for carrying out the filling of the hole within which it is inserted the vibrating tool with ground drawn in situ or by means of inert material introduction which is inserted from the opening of the hole with appropriate mechanical means (gummed blades).
  • the two systems of vibro-compaction previously described comprise the loading of a movable hopper upon the guiding tower which brings the inert material (generally gravel with different particle size) from the basis height wherein it is loaded by the gummed blade, up to the top of the system itself.
  • the inert material generally gravel with different particle size
  • the mode with which the inert materials are inserted within the vibrating tool takes generally place by overturning the hopper.
  • This overturning can be carried out either in mechanical way or in hydraulic way.
  • the system presents an operating machine equipped with a guiding vertical tower, to which is constrained a drill battery provided with an ending vibrating tool (vibro) of ground compaction and, sometimes, with a container arranged on the upper part of the vibro. To the latter, it is fixed a "hook"-type mechanical coupling, which acts as seat upon which a roller integral with the hopper slides and which constrains the structure to the overturning.
  • the hopper discharges the inert material directly within the battery.
  • the hydraulic actuation can be operated with a manual activation carried out by the operator, who generally has to suspend the treatment operations for dedicating to this operation.
  • the systems of known kind, and in particular the ones described, present some disadvantages.
  • the main disadvantage is constituted by the relevant supporting structure which must support the overturning loads of the entire hopper filled with inert material
  • the systems of known kind are not efficient from the point of view of the optimization of the supply cycle of the hopper, and present high loading times, particularly if considered in comparison with other operations.
  • the loads on the system, owing to the arms of relevant size are elevated, and furthermore the number of interventions that they have to carry out still remains relevant.
  • the Patent EP 1367180 A1 discloses a caisson positioned in the upper part of the vibro tool.
  • This caisson has two charging door, positioned at two different height (one on the bottom and one slanded on the top - front side).
  • the inert material can be loaded from the higher one, while the lower is closed. This permit to continue maintain the pressure of the fluids inside the battery of the vibro. Then is possible to close the higher one and opening the lower leaving the new inert material goes inside the battery.
  • This device and method doesn't relate nor describe how to supply the inert material from the hopper to the caisson and is not described how the hopper represented is used. This patent solve the problem to maintain the pressure inside the vibro string, during the refilling phase.
  • the hopper used for lifting the inert material to the caisson is not guided directly on it, or on the tower or on the battery but is freely just lifted from a winch. This may cause problems while loading the inert material from the hopper to the caisson. In fact if the hopper moves too much this may cause some inert material loss during the operation and may be dangerous for the personnel on the ground. If no interaction between the caisson and the hopper is described, nor if no openable door is inserted on the hopper, than only the state of the art could be considered as known, so a folding system for overturning the caisson should be considered for discharging the material.
  • the patent DE 29716935 A1 discloses a different type of charging door, mounted on the caisson of the vibro string and it has the same function of the discharging door of the previous patent EP 1367180 A1 .
  • the problem regarding how to transfer the inert material from the hopper to the caisson is not tackled. Also in this patent it is not explained how to guide the hopper properly and how to avoid the risk of inert material loss. More is not described any system for discharging the material from hopper to the caisson, and due to the fact that no openable door is inserted on the hopper, it has to be considered only the possibility to discharge the gravel from the top opening of the hopper, for example with an overturning movement.
  • the purpose of the present invention is to describe a device for the supply of inert materials to vibrating systems for ground compaction which is free from the above described inconvenients.
  • a device for the supply of inert materials to vibrating systems for ground compaction is made as claimed in the first claim.
  • the device for the supply of inert materials to vibrating systems for ground compaction according to the invention is generally designated with 10.
  • Device 10 is installed on board of an equipment 20 for vibrating ground compaction 100.
  • Equipment 20 for ground compaction 100 comprises:
  • One or more hydraulic pistons 25 fixed to the body of operating machine 21 and to a support 26 of tower 22 and to the tower itself, keep this last one in the wanted position during the operation, generally in vertical position with respect to ground 100.
  • An upper head 27 of tower 22, permits the hinge of a plurality of pulleys 31, upon which slides a traction cable or rope handled by a winch 24 positioned upon a rear part of tower 22; this winch 24 permits to lift up or down the drill battery 22a within the hole in ground 100, and acts with a return of second lower pulleys positioned near the basis of tower 22.
  • To upper head 27 is also fixed a first end of a tensioning cable 29, whose second end is instead constrained to a winch positioned on operating machine 21.
  • canalization 30 To caisson 23 is connected a canalization 30; this canalization runs in parallel with drill battery 22a for substantially all of its length, ending with an opening in correspondence with the lower end near a tip of the vibrating tool comprised in drill battery 22a.
  • an air compressor 40 In a rear part of operating machine 21, opposed to the part upon which is constrained tower 22, is present an air compressor 40, needed for permitting the carrying out of the vibro-compression technology of the equipment.
  • Device 10 which is present in the form of a hopper, is constrained to tower 22 through a plurality of guides 41, arranged in parallel to tower 22 itself and along which slides a double basket frame 50, fixed to plates 16, 17 of body 10 of the device; in detail plates 16, 17 are of removable type.
  • These guides 41 permit to device 10 to move along tower 22, starting substantially from a first lower height in proximity of ground 100 and reaching a second upper height where caisson 23 finds.
  • the device 10 has a discharging door 11 movable from a first open position to a second closed position; in this last one it permits to discharge the inert materials contained inside of it in caisson 23 positioned on the top of tower 22.
  • the discharging door when closed, acts as wall of a tank 13 of pyramidal shape with V-type transversal section, whose vertex is directed downwards.
  • Bars 14 present each one a first and a second end; the first end of each of bars 14 is constrained to a spring 12, whereas the second end of each of bars 14 is provided with a roller 14b pivoted on an axis Y orthogonal with respect to axis X and to the plane upon which rotate bars 14 themselves.
  • Springs 12 are also fixed to a respective lateral wall 10a, 10b of the device 10.
  • a movable locking pin 15 is also fixed to each of bars 14, in proximity of springs 12, in parallel with respect to them.
  • Each of locking pins 15 passes in a respective hole of lateral walls 10a, 10b and extends behind the discharging door 11, in such a way as to lock it in position when closed.
  • Hopper 10 is loaded when it finds in proximity of the ground with supports 51 and 51', height-adjustable, suitable for being also leaned against the ground.
  • hopper 10 is lifted up making frame 50 sliding along guides 41 till rollers 14b of levers 14 find strikers 52 of upper fixed caisson 23.
  • Levers 14 are then automatically rotated in contrast to springs 12, by drawing retaining means 15 from the respective holes.
  • discharging door 11 when opened, rotates by an angle such that to form continuity with end wall 56 for enabling the complete descent of the inert materials within caisson 23 and from here in conduct 30 associated to drill battery 22a.
  • the step of the descent of the hopper can begin; the couple of spring pushers 57 positioned on caisson 23 knocks against the free end of door 11 moving it again toward the closed position.
  • a camera 58 positioned on the top of caisson 23 displays the presence of inert material or the need of carrying out a new charge.
  • the top of drill battery 22a finds at different heights and it is not defined a position of unique charge, but only a relative one.
  • leverage system 14, 14b, 15 actuated by the same hoisting arrangement of the hopper, automatically activates the opening of door 11 and the consequent exit of the inert material.
  • rollers 14b and strikers 52 are not to be intended in a limiting way; in fact, the inversion of the positioning of rollers 14b with strikers 52 (that is the application of the rollers on caisson 23 and of the strikers on hopper 10) represent a solution equivalent to the one described.
  • a stop buffer positioned on the guide carriages upperly locks the ascent of the hopper with respect to the top of the part connected to the vibrator and permits to keep the parts referred between them (hopper and caisson).
  • Guides 59 positioned on caisson 23 have a reference function between the two faced particular hopper-caisson.
  • caisson 23' loses its main function of storing of the inert material, but leaving unaltered both the function of conveying the inert material itself to canalization 30 and the one of activation of the opening of door 11.
  • Caisson 23' comprises lateral containing walls which protrude outwards of canalization 30; these containing walls are positioned in proximity of trunk 54 of opening and are characterized by a tapered tract (chute) which permits to discharge the material inside canalization 30.
  • a tapered tract chlorute
  • caisson 23' On caisson 23' are then mounted the guiding devices 59 to hopper 10, stops 52 for the activation of the unlock of the door which takes place by acting on leverage 14 present on the hopper, and pushers 57 for favouring the closing of the door once the step of charging is terminated.
  • This solution can be used when the capacity of canalization 30 is suitable for keeping stored a sufficient quantitative of inert material.
  • device 10 can be also installed on equipments 20 wherein drill battery 22a is hanging in the vacuum, deprived of lateral guides, being fixed only in its upper part by one or more traction ropes.
  • excavation equipment 20 is a crane provided with an inclinable arm 50 (of lattice shape, as shown in figure, or telescopic, not shown) and fixed upon a first end of operating machine 21 and having upon a second end a plurality of pulleys 51, 31 upon which slide the traction ropes which hang drill battery 22a.
  • inclinable arm 50 of lattice shape, as shown in figure, or telescopic, not shown
  • the second end of arm 50 possesses also an extension directed outwards (technically known with the name of derrick), upon which is present a further pulley 52, upon which slides a traction cable 60 of device 10 independent from the traction rope of drill battery 22a.
  • Device 10 is fixed in such a way as to, when drawn by traction cable 60, proceed along a vertical path parallel to the direction detected by drill battery 22a.
  • the opening of door 11 is exerted by the inner pressure of the inert materials contained in the hopper, which, laterally exiting, find a simple escape way in the passing from the hopper to caisson 23.
  • the truncated conical inner shape of the hopper helps the discharge of the inert material.
  • actuator means e.g. hydraulic jacks
  • the system would anyway be advantageous in terms of structural lightening since it would not be required the overturning of the hopper charged with inert material, but it would leave unaltered the complication issues of the systems and of the interventions required to the operator.

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Civil Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Agronomy & Crop Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Soil Sciences (AREA)
  • Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
  • Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)
  • Road Paving Machines (AREA)

Claims (10)

  1. Dispositif (10) pour délivrer des matériaux inertes à des systèmes vibrants pour le compactage des sols, ledit dispositif étant installé sur un équipement de compactage (20) du sol (100), ledit équipement de compactage comprenant :
    - une machine d'exploitation motorisée (21) dotée d'une tour (22) ou d'un bras (50) pour supporter une batterie de tige de forage (22a) comprenant un outil vibrant pour le compactage du sol ; et
    - un caisson (23) (23') pour acheminer des matériaux inertes devant être délivrés, au moyen d'une canalisation (30), à ladite batterie de tige de forage (22a) dans un trou dans le sol (100),
    le dispositif (10) présentant sensiblement une forme de trémie et glissant entre une première hauteur inférieure près du sol (100) et une seconde hauteur, supérieure à la première, où le caisson se trouve (23, 23'), et dans lequel le matériau inerte y étant contenu glisse automatiquement dans le coffre (54) dudit caisson afin d'entrer directement dans la canalisation (30) qui l'amènera à la base du trou,
    le dispositif (10) étant caractérisé en ce qu'il est doté d'une porte d'évacuation (11) desdits matériaux inertes y étant contenus, mobile entre une première position fermée et une seconde position ouverte dans laquelle il permet d'évacuer les matériaux inertes contenus à l'intérieur de ce dernier dans le caisson 23, l'ouverture de la porte d'évacuation (11) ayant lieu au moyen de l'activation de moyens mécaniques associés au dispositif (10) et au caisson (23) (23').
  2. Dispositif selon la revendication 1, caractérisé en ce qu'il est guidé entre ladite première hauteur et ladite seconde hauteur par une pluralité de guides (41) de la tour (22).
  3. Dispositif selon la revendication 1, caractérisé en ce que la porte d'évacuation (11) est temporairement enclenchée en position fermée par au moins une butée mécanique en contraste avec un moyen élastique (12).
  4. Dispositif selon la revendication 1, caractérisé en ce que la porte d'évacuation (11), lorsqu'elle est fermée, constitue au moins une portion de paroi latérale dudit dispositif (10) de forme effilée, ayant une pluralité de parois agencées de telle sorte que cela permet l'évacuation du matériau contenu vers ladite canalisation (30).
  5. Dispositif selon la revendication 1, caractérisé en ce que les moyens mécaniques associés au dispositif (10) et au caisson (23) (23') sont constitués d'au moins un couple de barres (14) ; chaque barre (14) pivotant de façon centrale sur un axe (14a) par rapport au dispositif (10) et articulée à une extrémité à des moyens de retenue (15) pour ladite porte (11), et à l'autre extrémité à au moins un rouleau (14b) ; l'action d'au moins une butée (52) du caisson (23) (23') sur le rouleau (14b) provoquant la rotation des barres (14) et la libération du moyen de verrouillage de la porte (11) en contraste avec le moyen élastique (12) avec l'ouverture consécutive de la porte elle-même.
  6. Dispositif selon la revendication 1, comprenant en outre une paroi d'extrémité (56) et dans lequel la porte (11), une fois ouverte, tourne selon un angle de façon à former une continuité avec la paroi d'extrémité (56) elle-même.
  7. Dispositif selon la revendication 6, dans lequel au moins un poussoir à ressort (57) positionné sur le caisson (23) (23'), se heurte contre la porte (11), la déplaçant à nouveau vers la position fermée, activée par le mouvement de descente de la trémie effectué à la fin de l'évacuation, alors que le moyen élastique (12), lorsqu'il n'est pas tendu, pousse le moyen de butée (15) jusqu'au blocage de la porte (11) en position fermée.
  8. Dispositif selon la revendication 1, comprenant en outre une caméra (58) positionnée sur le dessus du caisson (23) (23') pour afficher la présence de matériaux inertes à l'intérieur de la trémie (10) ou pour signaler le besoin d'une nouvelle charge.
  9. Dispositif selon la revendication 1 caractérisé en ce que le transfert des matériaux inertes de la trémie (10) au caisson (23) (23') a lieu via l'ouverture automatique de la porte (11) lorsque la trémie (10) a atteint la hauteur relative de charge par rapport au-dessus de la batterie de tige de forage (22a).
  10. Dispositif selon la revendication 1, dans lequel ledit équipement de compactage (20) sur lequel il est installé est doté d'un bras inclinable (50) sur le dessus duquel ladite batterie de tige de forage (22a) est suspendue, libre de guides latéraux et dotée de moyens de traction pour sa manipulation verticale ; ledit dispositif (10) étant déplacé indépendamment de ladite batterie de tige de forage (22a) au moyen d'un câble de traction (60) respectif.
EP20100159117 2009-04-10 2010-04-06 Dispositif pour la consolidation d'un sol Not-in-force EP2241677B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITTO2009A000282A IT1393586B1 (it) 2009-04-10 2009-04-10 Dispositivo per l'alimentazione di materiali inerti a sistemi di compattazione a vibrazione del terreno.

Publications (3)

Publication Number Publication Date
EP2241677A2 EP2241677A2 (fr) 2010-10-20
EP2241677A3 EP2241677A3 (fr) 2010-12-29
EP2241677B1 true EP2241677B1 (fr) 2012-11-21

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ID=41152179

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20100159117 Not-in-force EP2241677B1 (fr) 2009-04-10 2010-04-06 Dispositif pour la consolidation d'un sol

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EP (1) EP2241677B1 (fr)
ES (1) ES2401165T3 (fr)
IT (1) IT1393586B1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016113140A1 (de) * 2016-07-15 2018-01-18 Alexander Degen Rüttleranordnung zum Herstellen von Stopfsäulen
EP3911801B1 (fr) 2019-01-18 2023-09-13 Keller Holding GmbH Vibro-flottation pour compactage d'un sol
EP4098803A1 (fr) * 2021-05-31 2022-12-07 ABI Anlagentechnik-Baumaschinen-Industriebedarf Maschinenfabrik und Vertriebsgesellschaft mbH Lance de bourrage vibrante et procédé d'équipement d'un mât d'une lance de bourrage vibrante

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58185819A (ja) * 1982-04-26 1983-10-29 Taisei Corp 砕石パイル工法
DE19707687C1 (de) * 1997-02-26 1998-10-15 Wilhelm Dr Degen Vorrichtung zum Herstellen von Materialsäulen im Boden
DE29716935U1 (de) * 1997-09-20 1998-02-12 Keller Grundbau Gmbh Vorrichtung zum Einbringen von Zusatzmaterial
DE19814021A1 (de) * 1998-03-30 1999-10-14 Degen Wilhelm Gerät zum Einbringen eines Fremdstoffes in Böden oder zur Verdichtung des Bodens
DE19941302C2 (de) * 1999-08-31 2003-06-26 Alois Robl Vorrichtung und Verfahren zur Herstellung von im Boden versenkten Tragsäulen
DE102005001227A1 (de) * 2005-01-10 2006-07-20 Keller Grundbau Gmbh Baugrundverbesserung durch Hybrid- Säulen

Also Published As

Publication number Publication date
EP2241677A2 (fr) 2010-10-20
EP2241677A3 (fr) 2010-12-29
ITTO20090282A1 (it) 2010-10-11
ES2401165T3 (es) 2013-04-17
IT1393586B1 (it) 2012-04-27

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