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
  • E02F3/907—Measuring or control devices, e.g. control units, detection means or sensors
• • E—FIXED CONSTRUCTIONS
  • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
  • E02F—DREDGING; SOIL-SHIFTING
  • E02F1/00—General working methods with dredgers or soil-shifting machines
• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
  • G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
  • G01C21/38—Electronic maps specially adapted for navigation; Updating thereof
  • G01C21/3863—Structures of map data
  • G01C21/387—Organisation of map data, e.g. version management or database structures
  • G01C21/3878—Hierarchical structures, e.g. layering

Definitions

• the invention relates to a method for the automatic adjustment of ground profiles in waters, in particular in a gravel pit to be sunk, by means of floating conveying devices.
• DE-A 199 42 472 discloses a method for the cartographically controlled sinking of waters by means of floating conveying devices.
• at least one base map on the base of a screen or vector map is produced from an existing water area map, in that the water is scanned by means of suitable devices for producing a three-dimensional depth profile.
• the position and orientation of the floating conveying device typically a floating dredger, is determined and marked in the base map.
• the so formed base map is stored in the computer of the system.
• the water ground and, if necessary, the water bank are scanned in short intervals in the near environment of the conveying device.
• the data which have been obtained thereby form a depth profile.
• On the base of the depth profile an updated base map will be made.
• Such map elements, for which the depth lines have changed due to the sinking of the water ground will be adapted, wherein the depth profile is preferably produced as colour running profile.
• Floating conveying devices in particular floating dredgers, can have different extraction means. These ones are preferably clams, cutting wheels, bucket chains or suction pipes, wherein the material layers present on the water ground, such as for example slush or gravel, are received by the respective extraction means and brought to their further destination.
• service staff For operating a floating conveying device, in particular for changing the position, service staff is required.
• the staff changes the length of the traction ropes, such that the floating conveying device is brought from a first extraction position into another extraction position.
• This aim is achieved by a method for the automatic adjustment of ground profiles in waters, in particular in a gravel pit to be sunk, by means of floating conveying devices, in that at least one base map is produced from an existing water area map, the water is scanned by means of suitable devices for obtaining a depth profile, the position as well as the orientation of the conveying device is determined, a cyclic updating of the actual water depth and a comparison with a desired depth profile are realized, wherein pre-determinable parameters of the extraction means of the conveying device are measured in the course of a layer-wise sinking operation and supplied to a control unit, and that in case of divergences from the parameters, the position of the conveying device will be changed.
• parameters such as the negative pressure, which is for example comprised between 0.5 and 0.8 bar, can be a corresponding threshold value. If the values remain under this threshold value, for example because no mixture, but only water is still extracted, this is a possible criterion for the fact that the position of the conveying device has to be changed.
• the extraction means has then namely either reached a depth, on which it must not further be lowered because of respecting a pre-determined desired depth, or it is on a mechanically maximum lowering depth thereof.
• Another parameter could be for example the performance characteristics of the used pump, in particular a vacuum pump, with respect to the rotational speed, performance and efficiency thereof. If, for example, the receiving area of the extraction means is clogged, this can lead to the cavitation of the pump as well as to the breakdown thereof.
• Another parameter is also the flow rate of the water-solid-mixture after passage through the pump, i.e. in the subsequent pipeline.
• control unit decides that the extraction at the given position has to be terminated.
• the position of the conveying device is modified automatically by the control unit which acts upon the mooring winches.
• control unit brings the floating conveying device into a new extraction position, where material which is worth to be extracted is present according to the base map.
• the subject of the invention furthermore allows to produce complex harmonious ground profiles depending on the requirements of the authorizing agencies and the operators. This ability is of a special importance, since at least in the filed of wet extraction of gravel and sand, more and more ecological requirements with respect to flat water zones as spawning or brooding zones and the like have to be met.

Landscapes

• Engineering & Computer Science (AREA)
• Remote Sensing (AREA)
• Radar, Positioning & Navigation (AREA)
• General Engineering & Computer Science (AREA)
• Mining & Mineral Resources (AREA)
• Structural Engineering (AREA)
• Civil Engineering (AREA)
• Physics & Mathematics (AREA)
• Mechanical Engineering (AREA)
• Automation & Control Theory (AREA)
• Databases & Information Systems (AREA)
• General Physics & Mathematics (AREA)
• Excavating Of Shafts Or Tunnels (AREA)
• Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
• Control Of Position, Course, Altitude, Or Attitude Of Moving Bodies (AREA)
• Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
• Treatment Of Sludge (AREA)
• Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
• Underground Or Underwater Handling Of Building Materials (AREA)

Applications Claiming Priority (3)

Publications (1)

Family

ID=33482235

Family Applications (1)

Country Status (6)

Cited By (2)

Families Citing this family (4)

Citations (10)

Family Cites Families (4)

• 2003
  • 2003-05-28 DE DE10324169A patent/DE10324169B3/de not_active Expired - Fee Related
• 2004
  • 2004-05-21 EP EP04738529A patent/EP1627114B1/fr not_active Revoked
  • 2004-05-21 CA CA002526945A patent/CA2526945A1/fr not_active Abandoned
  • 2004-05-21 DE DE502004004888T patent/DE502004004888D1/de not_active Revoked
  • 2004-05-21 AT AT04738529T patent/ATE372422T1/de not_active IP Right Cessation
  • 2004-05-21 US US10/558,531 patent/US20080016726A1/en not_active Abandoned
  • 2004-05-21 DE DE112004001422T patent/DE112004001422D2/de not_active Expired - Fee Related
  • 2004-05-21 WO PCT/DE2004/001059 patent/WO2004106643A2/fr active IP Right Grant

Patent Citations (10)

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