A Column Apparatus for Investigation of 1-D Unsaturated-Saturated Response of Sand-Geotextile Systems

This paper focuses on details of an experimental device used to investigate the transient unsaturated-saturated hydraulic response of sand-geotextile layers under conditions of 1-D constant head surface infiltration. The column was instrumented with inexpensive tensiometer-transducer devices to measure pore water pressures and conductivity probes to measure wetting front migration. Results of 2 tests are given to demonstrate the use of the apparatus. One test was conducted using a sand column; the second test was nominally identical but included a horizontal woven geotextile layer at mid-depth. Results demonstrate the apparatus can detect differences in the unsaturated response of the 2 systems (e.g., transient ponding of water was measured above the surface of geotextile layer commencing from an initial unsaturated condition despite relatively high saturated permeability of the woven material). There was a small but detectable delay in hydraulic flow after the wetting front reached the geotextile layer.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/01496115
• Authors:
  • Bathurst, Richard J
  • Ho, Alvin F
  • Siemens, Greg
• Publication Date: 2007-11

Language

• English

Media Info

• Media Type: Print
• Features: Figures; Photos; References; Tables;
• Pagination: pp 433-441
• Serial:
  • Geotechnical Testing Journal
  • Volume: 30
  • Issue Number: 6
  • Publisher: ASTM International
  • ISSN: 0149-6115
  • EISSN: 1945-7545
  • Serial URL: https://www.astm.org/products-services/standards-and-publications/geotechnical-testing-journal.html

Subject/Index Terms

• TRT Terms: Foundation soils; Geotechnical engineering; Geotextiles; Sandy soils; Soil science; Soil tests; Soil water
• Uncontrolled Terms: Soil column tests
• Subject Areas: Geotechnology; Highways; I42: Soil Mechanics;

Filing Info

• Accession Number: 01082454
• Record Type: Publication
• Files: TRIS
• Created Date: Dec 18 2007 11:28AM