EP2683878A1 - Procédé d'excavation tix - Google Patents
Procédé d'excavation tixInfo
- Publication number
- EP2683878A1 EP2683878A1 EP12703693.7A EP12703693A EP2683878A1 EP 2683878 A1 EP2683878 A1 EP 2683878A1 EP 12703693 A EP12703693 A EP 12703693A EP 2683878 A1 EP2683878 A1 EP 2683878A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- deposit
- water
- silty
- sandy
- hydropneumatic
- 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.)
- Withdrawn
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/88—Dredgers; Soil-shifting machines mechanically-driven with arrangements acting by a sucking or forcing effect, e.g. suction dredgers
- E02F3/90—Component parts, e.g. arrangement or adaptation of pumps
- E02F3/92—Digging elements, e.g. suction heads
- E02F3/9287—Vibrating suction heads
Definitions
- the invention relates to a method and a device for removal
- water is injected under pressure into the surface layer of the waterbed to be removed in order to reduce the viscosity of the same
- the layer thus treated (also referred to as a density layer) can flow off over a suitable level difference at the bottom of the water.
- Fine sands are common because of the naturally occurring longitudinal classification in waters. They are difficult to mobilize with the known hydropneumatic process mentioned above.
- Dredging impedes what statistically leads to a greater risk of accidents.
- a method is defined for better mobilization of fine-grained, sandy and / or silty sediments in bodies of water during the rearrangement, which makes use of the thixotropic properties of such sediments.
- thixotropy refers to a state in fine-grained, mostly sandy / clayey sediments in which reversible viscosity differences occur due to mechanical stress. Typical is a change from solid to liquid by vibration with subsequent return to the solid state.
- Grain packets are reduced by induced water.
- the Reynolds number provides information about the flow state. Physically important is the boundary layer analysis of the solid-liquid phase. Within longitudinal flowed Walls (particle walls) act in a very thin layer, the boundary layer or friction layer, strong frictional forces.
- the boundary layer thickness is essential for the frictional forces that must be expended when transporting the sediments.
- the kinematic and dynamic viscosity of the semi-stable sediment is significantly reduced in the short term by targeted mechanical forces acting on the thixotropic medium before the hydropneumatic action by the aforementioned dredging method on the sediment.
- the mechanical force is preferably applied by shearing and shaking on the sediment surface.
- a resonance is sought in the relocated sediments. The optimal parameters can be easily determined by preliminary tests.
- Influence on the physical boundary layers reduces the energy input as the stability and the inertia of the sediments to be relieved are reduced.
- shocks and shears in thixotropic sediments temporarily and partially decrease their viscosity, which makes them difficult to remove by conventional excavator methods
- Deposits can be done faster and more energy efficient.
- the technical device for reducing the viscosity is preferably installed on water injection dredgers, hopper dredgers and tractors. It consists of an example bar-like lowerable
- Different equipment depends on the sediment quality to be processed and is selected according to the best efficiency.
- the device is z. B. in the water injection process in
- An advantage of this combination method is that, compared to the known WI and Hopper method, significantly more thixotropic sediment per unit time can be mobilized.
- Impact number term from physical chemistry; a mathematical formula by which the frequency of two or more chemical reactants can be calculated.
- V volume [m 3 ]
- n number [1]
- T temperature in ° Kelvin
- ⁇ kinematic viscosity [m 2 / s]
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Treatment Of Sludge (AREA)
Abstract
L'invention concerne un procédé destiné à retirer des dépôts de sable et/ou de limon sur des surfaces de cours d'eau au moyen de procédés hydropneumatiques, en particulier d'injection d'eau, d'un dragage suceur ou similaire, caractérisé en ce qu'on expose le dépôt de sable/de limon à retirer à l'exercice d'une force diminuant la viscosité du dépôt, avant d'appliquer le procédé de retrait hydropneumatique.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP12703693.7A EP2683878A1 (fr) | 2011-02-08 | 2012-02-01 | Procédé d'excavation tix |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP11153674A EP2484838A1 (fr) | 2011-02-08 | 2011-02-08 | Procédé d'excavation |
EP12703693.7A EP2683878A1 (fr) | 2011-02-08 | 2012-02-01 | Procédé d'excavation tix |
PCT/EP2012/000449 WO2012107180A1 (fr) | 2011-02-08 | 2012-02-01 | Procédé d'excavation tix |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2683878A1 true EP2683878A1 (fr) | 2014-01-15 |
Family
ID=44201175
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11153674A Withdrawn EP2484838A1 (fr) | 2011-02-08 | 2011-02-08 | Procédé d'excavation |
EP12703693.7A Withdrawn EP2683878A1 (fr) | 2011-02-08 | 2012-02-01 | Procédé d'excavation tix |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11153674A Withdrawn EP2484838A1 (fr) | 2011-02-08 | 2011-02-08 | Procédé d'excavation |
Country Status (2)
Country | Link |
---|---|
EP (2) | EP2484838A1 (fr) |
WO (1) | WO2012107180A1 (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2016055119A1 (fr) * | 2014-10-10 | 2016-04-14 | Egon Prexl | Procédé de dragage par érosion |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2256627A1 (de) * | 1972-11-17 | 1974-05-22 | Held & Francke Bau Ag | Verfahren zum mischen von schlammartigen medien mit wasser und zum transport solcher mischungen und vorrichtung zur durchfuehrung solcher verfahren |
US5146699A (en) * | 1991-12-05 | 1992-09-15 | Ellicott Machine Corporation | Auger dredge specially adapted to removal of toxic sediment |
FR2860532B1 (fr) * | 2003-10-03 | 2007-04-27 | Michel Poteur | Dispositif pour le devasement sans pollution ni consommation d'eau notables |
DE202009018834U1 (de) | 2009-06-12 | 2014-02-21 | Thorsten Bolls | Schleppkopfsaugbagger zur Durchführung der Sediment-Transport-Baggerung |
-
2011
- 2011-02-08 EP EP11153674A patent/EP2484838A1/fr not_active Withdrawn
-
2012
- 2012-02-01 WO PCT/EP2012/000449 patent/WO2012107180A1/fr active Application Filing
- 2012-02-01 EP EP12703693.7A patent/EP2683878A1/fr not_active Withdrawn
Non-Patent Citations (1)
Title |
---|
See references of WO2012107180A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP2484838A1 (fr) | 2012-08-08 |
WO2012107180A1 (fr) | 2012-08-16 |
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Legal Events
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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Effective date: 20131105 |
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DAX | Request for extension of the european patent (deleted) | ||
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 20180901 |