Installation of a laminated fabric subsurface drainage system

This short report describes the solution to an instability problem in the embankment of a section of a recently constructed freeway in New South Wales. The steep batter (1 in 1) was considered to be the main cause of instability. Therefore a berm was placed against the embankment slope, effectively reducing the batter slope to 1 in 1.5. To avoid a possible increase in soil moisture, a laminated artificial fabric was placed at the interface of the existing and the new construction. Any water which is collected is fed into a conventional 100 mm diameter, slotted, corrugated plastic drainage pipe for disposal into the armco culvert which was extended through the widened embankment. The report discusses the reasons behind the installation and design selection and the construction process, but does not give any post installation experience (a).

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  • Corporate Authors:


    Melbourne, Victoria  Australia 
  • Authors:
    • Gerke, R J
  • Publication Date: 1981-7


  • English

Media Info

  • Pagination: 13P
  • Serial:
    • Issue Number: AIR 317-5

Subject/Index Terms

Filing Info

  • Accession Number: 01438611
  • Record Type: Publication
  • Source Agency: ARRB
  • Files: ATRI
  • Created Date: Aug 24 2012 9:38PM