NL2018132B1 - Method and equipment for compacting soil - Google Patents

Method and equipment for compacting soil Download PDF

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Publication number
NL2018132B1
NL2018132B1 NL2018132A NL2018132A NL2018132B1 NL 2018132 B1 NL2018132 B1 NL 2018132B1 NL 2018132 A NL2018132 A NL 2018132A NL 2018132 A NL2018132 A NL 2018132A NL 2018132 B1 NL2018132 B1 NL 2018132B1
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Netherlands
Prior art keywords
gravel
stone
vibroflot
funnel
brick
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NL2018132A
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Dutch (nl)
Inventor
De Gier Arend
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Dieseko Group B V
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Priority to NL2018132A priority Critical patent/NL2018132B1/en
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Publication of NL2018132B1 publication Critical patent/NL2018132B1/en

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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
    • E02D3/02—Improving by compacting
    • E02D3/10—Improving by compacting by watering, draining, de-aerating or blasting, e.g. by installing sand or wick drains

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Structural Engineering (AREA)
  • Agronomy & Crop Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Soil Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)

Abstract

Method and equipment for compacting soil using a vibroflot to introduce and build up a column of stone gravel into the soil, wherein the vibroflot is introduced to a lowest point into the soil and stone gravel is continuously trans- ported to an inlet manifold of the vibroflot starting when the vibroflot is at its lowest point in the soil, and wherein the stone gravel is arranged to exit the vibroflot from a bottom feed of the vibroflot, wherein after start of the transportation of the stone gravel the vibroflot is gradually retracted from the soil, leaving a gradually growing column of stone gravel in the soil. The method and equipment is applied for building up a column of stone gravel into a soil which is underwater, wherein stone gravel is provided to the inlet manifold of the vibroflot in a mixture with water through a transport hose by providing the stone gravel to a stone dump funnel having an opening above the waterline and by providing a water suction funnel with an opening below the waterline, and wherein the stone dump funnel and the water dump funnel are arranged to feed the transport hose.

Description

Octrooicentrum
Nederland
© 2018132 © Aanvraagnummer: 2018132 © Aanvraag ingediend: 05/01/2017 © BI OCTROOI © Int. Cl.:
E02D 3/10 (2017.01)
© Aanvraag ingeschreven: © Octrooihouder(s):
25/07/2018 Dieseko Group B.V. te Sliedrecht.
© Aanvraag gepubliceerd:
- © Uitvinder(s):
Arend de Gier te Arkel.
© Octrooi verleend:
25/07/2018
© Gemachtigde:
© Octrooischrift uitgegeven: mr. ir. J. van Breda c.s. te Amsterdam.
25/07/2018
© Method and equipment for compacting soil © Method and equipment for compacting soil using a vibroflot to introduce and build up a column of stone gravel into the soil, wherein the vibroflot is introduced to a lowest point into the soil and stone gravel is continuously transported to an inlet manifold of the vibroflot starting when the vibroflot is at its lowest point in the soil, and wherein the stone gravel is arranged to exit the vibroflot from a bottom feed of the vibroflot, wherein after start of the transportation of the stone gravel the vibroflot is gradually retracted from the soil, leaving a gradually growing column of stone gravel in the soil. The method and equipment is applied for building up a column of stone gravel into a soil which is underwater, wherein stone gravel is provided to the inlet manifold of the vibroflot in a mixture with water through a transport hose by providing the stone gravel to a stone dump funnel having an opening above the waterline and by providing a water suction funnel with an opening below the waterline, and wherein the stone dump funnel and the water dump funnel are arranged to feed the transport hose.
NL Bl 2018132
Dit octrooi is verleend ongeacht het bijgevoegde resultaat van het onderzoek naar de stand van de techniek en schrifteiijke opinie. Het octrooischrift komt overeen met de oorspronkelijk ingediende stukken.
Method and equipment for compacting soil
The invention relates to a method and to equipment for compacting soil using a vibroflot to introduce and build up a column of stone gravel into the soil, wherein the vibroflot is introduced to a lowest point into the soil and stone gravel is continuously transported to an inlet manifold of the vibroflot starting when the vibroflot is at its lowest point in the soil, and wherein the stone gravel is arranged to exit the vibroflot from a bottom feed of the vibroflot, wherein after start of the transportation of the stone gravel the vibroflot is gradually retracted from the soil, leaving a gradually growing column of stone gravel in the soil.
Such a method and equipment are known for use on shore from WO2012/136207 .
Deep vibratory techniques using vibroflots are generally known as vibro-compaction and vibro-replacement. The techniques are used for densifying granular soils, as well as for realizing stone columns into the soil.
Vibro-compaction is a deep compaction technique for densifying granular soils with less than 10 - 15% silt present. The process is done 'in situ', using a vibroflot. Water under high pressure is jetted sideways and downwards from the vibroflot to assist the penetration process. Under the influence of simultaneous vibration and saturation, loose sand and/or gravel particles are repacked into a denser state and lateral confining pressure within the soil mass is increased. As an option, additional extension tubes can be added to allow the vibroflot to do its work to depths of more than 25 meter.
According to the invention the method is now applied for building up a column of stone gravel into a soil which is underwater, wherein stone gravel is provided to the inlet manifold of the vibroflot in a mixture with water through a transport hose by providing the stone gravel to a stone dump funnel having an opening above the waterline and by providing a water suction funnel with an opening below the waterline, and wherein the stone dump funnel and the water dump funnel are arranged to feed the transport hose.
Accordingly the equipment used in the invention comprises a vibroflot to introduce and build up a column of stone gravel into the soil, wherein the vibroflot is provided with an inlet manifold for stone gravel, and wherein the vibroflot is arranged with a bottom feed to enable that the stone gravel exits the vibroflot, wherein the vibroflot is connected with a transport hose for providing the stone gravel to the vibroflot in a mixture with water, and wherein the equipment is provided with a stone dump funnel for receipt of stone gravel and provided with a water suction funnel for receipt of water, and wherein the stone dump funnel and the water dump funnel are arranged to feed the transport hose.
Beneficially the stone dump funnel receives and transfers the stone gravel to the water dump funnel by gravity.
It is further preferable that a dredging pump is provided between the water suction funnel and the transport hose in order to provide a negative pressure at the water suction funnels exit. This provides that water is introduced at the entrance of the transport hose.
Advantageously the dredging pump is arranged to transport the mixture of gravel stone and water through the transport hose to the inlet manifold of the vibroflot.
In a preferred embodiment a support for the vibroflot is arranged on a floating structure which floats on the water above the soil, which floating structure is further provided with conveying means for conveying stone gravel to the stone dump funnel.
In one embodiment the conveying means comprises a stone gravel transport belt which is arranged between a storage of stone gravel, which is placed on the floating structure, and a stone gravel dump plate which is positioned above the stone dump funnel to restrict horizontal displacement of the stone gravel beyond the stone gravel dump plate. This arranges that the stone gravel will enter the stone dump funnel in a vertical motion.
The invention will hereinafter be further elucidated with reference to the drawing of an exemplary embodiment of equipment according to the invention that is not limiting as to the appended claims.
In the drawing the figure shows a series of devices making up the equipment according to the invention.
With reference to the figure it shows soil compacting equipment comprising a vibroflot 9 to introduce and build up a column 11 of stone gravel into the soil 13. The vibroflot 9 is provided with an inlet manifold 8 for stone gravel, and the vibroflot 9 is further arranged with a bottom feed 10 to enable that the stone gravel can exit the vibroflot 9.
The vibroflot 9 is connected with a transport hose 7 for providing the stone gravel to the vibroflot 9 in a mixture with water, to which end the equipment is provided with a stone dump funnel 4 for receipt of stone gravel and is further provided with a water suction funnel 5 for receipt of water, wherein the stone dump funnel 4 and the water dump funnel 5 are arranged to feed the transport hose 7.
The stone dump funnel 4 is arranged to receive and transfer the stone gravel to the water dump funnel 5 by gravity.
Further preferably a dredging pump 6 is provided between the water suction funnel 5 and the transport hose 7. This dredging pump 6 is arranged to transport the mixture of gravel stone and water through the transport hose 7 towards the inlet manifold 8 of the vibroflot 9.
A support for the vibroflot 9 is arranged on a floating structure 12, such as a barge, which floating structure 12 is further provided with conveying means 2, preferably in the form of a conveyor belt, for conveying stone gravel to the stone dump funnel 4.
The conveying means 2 is arranged between a storage 1 of stone gravel on the floating structure 12, and a stone gravel dump plate 3 which is positioned above the stone dump funnel 4 to restrict horizontal displacement of the stone gravel beyond the stone gravel dump plate 3 so as to arrange that the stone gravel supplied by the stone gravel transport belt 2 enters the stone dump funnel 4 in a vertical motion.
Using the above discussed equipment, the method of compacting soil according to the invention can be elucidated as follows.
Before feeding the bottom feed vibroflot 9 with a stone water mixture, the bottom feed vibroflot 9 is used to create a bottom cavity 16 into the soil 13 with the correct depth. Therefore the dredging pump 6 is started to pump water via the stone/water transport hose 7 towards the vibratory inlet manifold 8, where it will exit at the nose 10 of the bottom feed vibroflot 9. When waterflow is established, the bottom feed vibroflot 9 is started to create a cavity 16 with the correct dimensions into the soil 13 using standard vibration techniques .
When the bottom feed vibroflot 9 has reached its lowest position, stone gravel transport can start. To entertain the stone gravel transport during building of the stone column 11 in the soil 13, a stone gravel load 1 is provided on a support structure 12, such as a barge, which gravel load 1 will the sufficient for the volume of a predefined amount of single stone columns to be provided into the soil 13.
The stone gravel will be taken from the gravel stone load 1 and with means known to the artisan, such as grippers, be placed on the stone transport belt 2, which will subsequently transport the stone gravel towards the stone dump plate 3. The stone transport belt 2 speed is adjustable to assure a correct flow speed of stone gravel which correlates with the required stone volume per column 11 to be provided in the soil 13, and corresponding with the retraction speed of the bottom feed vibroflot 9 at which it is retracted from the soil 13.
At the end of the transfer belt 2 the stone gravel will hit the stone dump plate 3 which removes the horizontal component in the movement of the stone gravel, in order to have the stone gravel thereafter fall in a vertical direction towards the stone dump funnel 4 under the influence of gravity.
In the stone dump funnel 4, the opening of which is positioned above the waterline 15, the stone gravel is gathered and transferred to the water suction funnel 5 again under the influence of gravity. In the water suction funnel 5, which is completely submerged under the waterline 15, water will ingress due to the positive water pressure outside of the water suction funnel 5 and the negative pressure created inside the water suction funnel 5 by the suction head of the dredging pump 6 which is connected to the outlet of the water suction funnel 5. In this way water and stone gravel will mix inside the water suction funnel 5 and be pumped into the stone water transport hose 7 by the dredging pump 6. In this process the dredging pump 6 will deliver sufficient discharge head pressure to overcome the counter pressure due to the highest possible position of the vibroflot inlet manifold 8 during operation. The water/stone gravel mixture will thus be transported by the stone water transport hose 7 towards the vibroflot inlet manifold 8. Via the stone pipe of the bottom feed vibroflot 9 the stones are dumped inside the cavity 16 created by the bottom vibroflot 9. By gradual retraction of the bottom feed vibroflot 9, while assuring a continuous feed of stone/water mixture towards the vibroflot inlet manifold 8, the stone column 11 is effectively created in the cavity 16 in the soil 13.
It is remarked that the stone gravel feed to the stone dump funnel 4 can also be established without using a stone transport means 2, such as the shown conveyor belt. It is for instance possible to dump the stone gravel directly into the stone dump funnel 4 by an excavator (not shown).
Although the invention has been discussed in the foregoing with reference to an exemplary embodiment of the equipment of the invention, the invention is not restricted to this particular embodiment which can be varied in many ways without departing from the invention. The discussed exemplary embodiment shall therefore not be used to construe the appended claims strictly in accordance therewith. On the contrary the embodiment is merely intended to explain the wording of the appended claims without intent to limit the claims to this exemplary embodiment. The scope of protection of the invention shall therefore be construed in accordance with the appended claims only, wherein a possible ambiguity in the wording of the claims shall be resolved using this exemplary embodiment.

Claims (13)

CONCLUSIESCONCLUSIONS 1. Werkwijze voor het compacteren van grond (13) gebruikmakend van een vibroflot (9) voor het inbrengen en opbouwen van een kolom (11) van steengravel in de grond (13), waarbij de vibroflot (9) ingebracht wordt tot een laagste punt in de grond (13) en steengravel continu getransporteerd wordt naar een inlaatspruitstuk (8) van de vibroflot (9) waarmee wordt begonnen wanneer de vibroflot (9) haar laagste punt in de grond (13) heeft bereikt, en waarbij het steengravel is ingericht om de vibroflot (9) te verlaten via een bodemvoeder (10) van de vibroflot (9), waarbij na start van het transport van het steengravel de vibroflot (9) geleidelijk uit de grond (13) wordt teruggetrokken, daarbij een groeiende kolom steengravel in de grond (13) achterlatend, met het kenmerk, dat de werkwijze toegepast wordt voor het opbouwen van een kolom steengravel in de grond (13) welke zich onder water (14) bevindt, waarbij steengravel door een transportbuis (7) wordt gevoerd naar het inlaatspruitstuk (8) van de vibroflot (9) in een mengsel met water door het toevoeren van steengravel aan een steenopvangtrechter (4) met een opening boven de waterlijn (15), en door het voorzien in een waterzuigtrechter (5) met een opening onder de waterlijn (15), en waarbij de steenopvangtrechter (4) en de waterzuigtrechter (5) zijn ingericht om de transportbuis (7) te voeden.A method for compacting soil (13) using a vibroflot (9) for introducing and building a column (11) of rock gravel into the soil (13), wherein the vibroflot (9) is introduced to a lowest point in the ground (13) and brick gravel is continuously transported to an inlet manifold (8) of the vibroflot (9) which is started when the vibroflot (9) has reached its lowest point in the ground (13), and wherein the brick gravel is arranged to leave the vibroflot (9) via a bottom feed (10) of the vibroflot (9), wherein after the start of the transport of the rock gravel the vibroflot (9) is gradually withdrawn from the soil (13), thereby a growing column of rock gravel leaving behind in the ground (13), characterized in that the method is used for building up a column of stone gravel in the ground (13) which is under water (14), whereby stone gravel is passed through a transport pipe (7) to the intake manifold (8) from the vibroflot (9) in a mixture with water by supplying stone gravel to a stone collection funnel (4) with an opening above the waterline (15), and by providing a water suction funnel (5) with an opening below the waterline (15) and wherein the stone collection funnel (4) and the water suction funnel (5) are adapted to feed the transport tube (7). 2. Werkwijze volgens conclusie 1, met het kenmerk, dat de steenopvangtrechter (4) het steengravel ontvangt en overbrengt naar de waterzuigtrechter (5) door middel van de zwaartekracht.Method according to claim 1, characterized in that the stone receiving funnel (4) receives the stone gravel and transfers it to the water suction funnel (5) by means of gravity. 3. Werkwijze volgens conclusie 1 of 2, met het kenmerk, dat een baggerpomp (6) voorzien is tussen de waterzuigtrechter (5) en de transportbuis (7) teneinde te voorzien in een negatieve druk bij een uitvoer van de waterzuigtrechter (5) .Method according to claim 1 or 2, characterized in that a dredging pump (6) is provided between the water suction funnel (5) and the transport tube (7) to provide a negative pressure at an outlet of the water suction funnel (5). 4. Werkwijze volgens conclusie 3, met het kenmerk, dat de baggerpomp (6) is ingericht voor het transporteren van het mengsel van gravelsteen en water door de transportbuis (7) naar het inlaatspruitstuk (8) van de vibroflot (9).Method according to claim 3, characterized in that the dredging pump (6) is arranged for transporting the mixture of gravel stone and water through the transport tube (7) to the inlet manifold (8) of the vibroflot (9). 5. Werkwijze volgens één der voorgaande conclusies 15. Method according to one of the preceding claims 1 - 3, met het kenmerk, dat een steun voor de vibroflot (9) is ingericht op een drijvende structuur (12), welke drijvende structuur verder voorzien is van transportmiddelen (2) voor het overbrengen van steengravel naar de steenopvangtrechter (4) .- 3, characterized in that a support for the vibroflot (9) is arranged on a floating structure (12), which floating structure is further provided with transport means (2) for transferring rock gravel to the rock receiving funnel (4). 6. Werkwijze volgens conclusie 5, met het kenmerk, dat erin voorzien wordt dat de transportmiddelen (2) een steengravel-transportband omvatten welke is ingericht tussen een opslag (1) voor steengravel en een steengravel-keerplaat (3) welke gepositioneerd is boven de steenopvangtrechter (4) voor het beperken van een horizontale verplaatsing van het steengravel voorbij de steengravel-keerplaat (3) teneinde te bewerkstelligen dat het steengravel de steenopvangtrechter (4) ingaat.Method according to claim 5, characterized in that it is provided that the transport means (2) comprise a brick gravel conveyor belt which is arranged between a brick gravel storage (1) and a brick gravel baffle plate (3) which is positioned above the stone collection funnel (4) for limiting horizontal movement of the stone gravel past the stone gravel baffle plate (3) to cause the stone gravel to enter the stone collection funnel (4). 7. Grond-compacteerapparatuur omvattende een vibroflot (9) voor het inbrengen en opbouwen van een kolom (11) van steengravel in de grond (13), waarbij de vibroflot (9) voorzien is van een inlaatspruitstuk (8) voor steengravel, en waarbij de vibroflot (9) is ingericht met een bodemvoeder (10) teneinde mogelijk te maken dat het steengravel de vibroflot (9) verlaat, met het kenmerk, dat de vibroflot (9) verbonden is met een transportbuis (7) voor het verschaffen van het steengravel aan de vibroflot (9) in een mengsel met water, en dat de apparatuur voorzien is van een steenopvangtrechter (4) voor het ontvangen van steengravel en voorzien is van een waterzuigtrechter (5) voor ontvangst van water, en waarbij de steenopvangtrechter (4) en de waterzuigtrechter (5) zijn ingericht om de transportbuis (7) te voeden.A soil compacting apparatus comprising a vibroflot (9) for introducing and building a column (11) of brick gravel into the ground (13), wherein the vibroflot (9) is provided with an inlet manifold (8) for brick gravel, and wherein the vibroflot (9) is arranged with a bottom feeder (10) to enable the brick gravel to leave the vibroflot (9), characterized in that the vibroflot (9) is connected to a transport tube (7) for providing the stone gravel on the vibroflot (9) in a mixture with water, and that the equipment is provided with a stone collection funnel (4) for receiving stone gravel and is provided with a water suction funnel (5) for receiving water, and wherein the stone collection funnel (4) ) and the water suction funnel (5) are adapted to feed the transport tube (7). 8. Grond-compacteerapparatuur volgens conclusie 7, met het kenmerk, dat de steenopvangtrechter (4) is ingericht voor het ontvangen en overbrengen van het steengravel naar de waterzuigtrechter (5) door middel van de zwaartekracht.Ground compacting equipment according to claim 7, characterized in that the stone collection funnel (4) is adapted to receive and transfer the stone gravel to the water suction funnel (5) by means of gravity. 9. Grond-compacteerapparatuur volgens conclusie 7 of 8, met het kenmerk, dat een baggerpomp (6) voorzien is tussen de waterzuigtrechter (5) en de transportbuis (7).Ground compacting equipment according to claim 7 or 8, characterized in that a dredging pump (6) is provided between the water suction funnel (5) and the transport pipe (7). 10. Grond-compacteerapparatuur volgens conclusie 9, met het kenmerk, dat de baggerpomp (6) is ingericht voor het transporteren van het mengsel van gravelsteen en water door de transportbuis (7) en naar het inlaatspruitstuk (8) van de vibroflot (9) .Ground compacting equipment according to claim 9, characterized in that the dredging pump (6) is adapted to transport the mixture of gravel stone and water through the transport pipe (7) and to the inlet manifold (8) of the vibroflot (9) . 11. Grond-compacteerapparatuur volgens één der voorgaande conclusies 7 - 10, met het kenmerk, dat een steun voorGround compacting apparatus according to one of the preceding claims 7 to 10, characterized in that a support for 5 de vibroflot (9) is ingericht op een drijvende structuur (12), welke drijvende structuur verder voorzien is van transportmiddelen (2) voor het overbrengen van steengravel naar de steenopvangtrechter (4) .The vibroflot (9) is arranged on a floating structure (12), which floating structure is further provided with transport means (2) for transferring brick gravel to the brick receiving funnel (4). 12. Grond-compacteerapparatuur volgens conclusie 11,12. Ground compacting equipment according to claim 11, 10 met het kenmerk, dat de transportmiddelen (2) een steengraveltransportband omvatten welke is ingericht tussen een opslag (1) voor steengravel en een steengravel-keerplaat (3) welke gepositioneerd is boven de steenopvangtrechter (4) voor het beperken van een horizontale verplaatsing van het steengravelCharacterized in that the conveying means (2) comprise a stone-gravel conveyor belt which is arranged between a stone-gravel storage (1) and a stone-gravel baffle plate (3) which is positioned above the stone collection funnel (4) for limiting a horizontal displacement of the stone gravel 15 voorbij de steengravel-keerplaat (3) teneinde te bewerkstelligen dat het door de steengravel-transport-band (2) aangevoerde steengravel de steenopvangtrechter (4) ingaat.15 past the brick gravel baffle plate (3) to cause the brick gravel supplied by the brick gravel conveyor belt (2) to enter the brick receiving funnel (4). 1/11/1
NL2018132A 2017-01-05 2017-01-05 Method and equipment for compacting soil NL2018132B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111593725A (en) * 2020-05-15 2020-08-28 北京市政建设集团有限责任公司 Vibroflotation gravel pile and construction method thereof

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2311083A (en) * 1996-03-15 1997-09-17 Dredging Int Inserting a column of stabilising material into the ground
EP0861944A1 (en) * 1997-02-26 1998-09-02 Wilhelm Dr. Degen Device for making a column in the ground
WO2012136207A1 (en) * 2011-04-04 2012-10-11 Wilhelm Degen Device for producing a material column in the ground

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2311083A (en) * 1996-03-15 1997-09-17 Dredging Int Inserting a column of stabilising material into the ground
EP0861944A1 (en) * 1997-02-26 1998-09-02 Wilhelm Dr. Degen Device for making a column in the ground
WO2012136207A1 (en) * 2011-04-04 2012-10-11 Wilhelm Degen Device for producing a material column in the ground

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111593725A (en) * 2020-05-15 2020-08-28 北京市政建设集团有限责任公司 Vibroflotation gravel pile and construction method thereof

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