DEEP COMPACTION WITH VIBRO-WING METHOD

The article describes the construction of an extension of the harbour at Rostock, German Democratic Republic and suggests other possible applications of the method. Some 1.2 million m3 of hydraulic fill was compacted to a maximum depth of 15 m using a long steel rod provided with a number of wings welded to the rod. The unit is driven down into the fill using a high capacity vibrating hammer and then slowly pulled out during continued vibration. Pore water pressure increases rapidly during the compaction around the unit as it is driven into the soil, effectively reducing the effective stress displacing individual sand particles producing a higher relative density. A liquified zone exists around the vibro-wing whose size depends upon the relative density. The greatest advantage of the method is the speed and low cost compared with other deep compaction methods; the thickness of the poorly compacted surface layer is also relatively small. A limitation is that water may have to be added above ground water level. Possible applications described include foundations, harbours, hydraulic fills, dams, especially tailings dams subjected to earthquakes, machine foundations and special structures where compaction has to be done below water. (TRRL)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00174653
• Corporate Authors:

  Foundation Publications Limited

  7 Ongar Road
  Brentwood CM15 9AU, Essex,   England 
• Authors:
  • BROMS, B B
  • Hansson, O E
• Publication Date: 1984-7

Media Info

• Features: Figures; Tables;
• Pagination: p. 34-36
• Serial:
  • GROUND ENGINEERING
  • Volume: 17
  • Issue Number: 5
  • Publisher: EMAP CONSTRUCT LIMITED
  • ISSN: 0017-4653

Subject/Index Terms

• TRT Terms: Compaction; Costs; Dams; Density; Depth; Earthquake resistant design; Earthquake resistant structures; Effective stress; Equipment; Foundations; Harbors; Hydraulic fills; Liquefaction; Marine terminals; Methodology; Pore water pressures; Soils; Specific gravity; Vibration; Vibratory equipment
• Uncontrolled Terms: Quick
• Geographic Terms: Germany
• Old TRIS Terms: Harbor structures; Vibrating equipment
• ITRD Terms: 3085: Bearing capacity; 5900: Brittleness; 6486: Chart; 4177: Clay; 3686: Compaction; 6430: Correction; 224: Cost; 5595: Deformation; 5907: Degree of saturation (mater); 5908: Density; 6499: Depth; 9011: Design (overall design); 3674: Equipment; 5520: Failure; 8029: Germany, Democratic Republic of; 2802: Hydraulic fill; 6237: Laboratory (not an organization); 5567: Load; 6473: Mathematical model; 9102: Method; 5483: Movement; 5762: Pore water pressure; 1098: Port; 9064: Quick; 3397: Shallow foundation; 5531: Shear; 5544: Strength (mater); 5575: Stress (in material); 5558: Vibration
• Subject Areas: Construction; Finance; Geotechnology; Highways; Marine Transportation; Terminals and Facilities;

Filing Info

• Accession Number: 00393286
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD, TRIS
• Created Date: Jun 30 1985 12:00AM