CONSOLIDATION OF CLAY BY BANDSHAPED PREFABRICATED DRAINS

The designing and installing of a vertical drain installation with prefab band-shaped drains is described, and the difference, if any, between these drains and the better-known cylindical sand drains is elucidated. Design considerations such as drain spacing, equivalent diameter, well resistance, effect of disturbance, filter requirements, free surface area, and free volume are detailed. The need for vertical drains is discussed. In addition to the difficulties of determining the compression modulus, the main concern in the design of a vertical drain is to find the correct value of the coefficient of consolidation with porewater flow. The results of monitoring a number of test sites to check the correlation between prediction and actual behaviour of load embankments on clay provided with prefab drains and sand drains are reported. Observations in Sweden show that the drains in question, geodrains, have functioned as expectd some 4-5 years after installation. Innovations in prefab drains that could be expected in the future are described.

• 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:
  • HANSBO, S
• Publication Date: 1979-7

Media Info

• Features: Figures; References;
• Pagination: p. 16-27
• Serial:
  • GROUND ENGINEERING
  • Volume: 12
  • Issue Number: 5
  • Publisher: EMAP CONSTRUCT LIMITED
  • ISSN: 0017-4653

Subject/Index Terms

• TRT Terms: Building; Clay; Coefficients; Compression; Consolidation; Design; Drains; Facilities; Filter drains; Flow; Installation; Modulus; Monitoring; Pore water; Prefabricated structures; Sand drains; Soils; Vertical drains
• Uncontrolled Terms: Soil consolidation
• Old TRIS Terms: Bands
• Subject Areas: Construction; Design; Geotechnology; Highways; Maintenance and Preservation;

Filing Info

• Accession Number: 00302127
• Record Type: Publication
• Files: TRIS
• Created Date: Jan 30 1980 12:00AM