ESTIMATING MOVEMENT WITH TIME DOMAIN REFLECTOMETRY (TDR)

Time domain reflectometry (TDR) has been used in the past to locate and estimate movements in landslides encroaching highways. As part of this study, further research of TDR and landslide monitoring was performed to evaluate if readings obtained from TDR can be correlated with the amount of movement along a slide plane. Field measurements obtained using side by side or nearby slope inclinometers and TDR cables were compared. In addition, laboratory tests were carried-out using a cable shear-testing device designed to simulate the slide plane conditions found within a landslide. The following issues were examined in relation to both the field and lab studies: (1) the amount of slide plane movement required to detect a TDR reflection reading in the cable; (2) the amount of movement associated with a TDR reflection as the slide mass continues to move; and (3) the influence of installation conditions on TDR readings. Based on the results of this study, tentative relationships between slide plane movement and TDR reflection readings are discussed. However, these relationships depend upon cable type, grout strength, and soil at the shear interface.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0784407444
• Corporate Authors:

  American Society of Civil Engineers

  Geo Institute, 1801 Alexander Bell Drive
  Reston, VA  United States  20191-4400
• Authors:
  • Serafin, D C
  • Fiegel, G L
• Conference:
  • Geotechnical Engineering for Transportation Projects, Geo-Trans 2004
  • Location: Los Angeles, California
  • Date: 2004-7-27 to 2004-7-31
• Publication Date: 2004

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: 9 p.
• Serial:
  • ASCE Geotechnical Special Publication
  • Issue Number: 126
  • Publisher: American Society of Civil Engineers

Subject/Index Terms

• TRT Terms: Cables; Earth movements (Geophysics); Field tests; Highways; Inclinometers; Laboratory tests; Landslides; Measurement; Monitoring; Shear tests; Slope stability; Time domain reflectometers
• Subject Areas: Geotechnology; Highways; I42: Soil Mechanics;

Filing Info

• Accession Number: 00988675
• Record Type: Publication
• ISBN: 0784407444
• Report/Paper Numbers: Volume II
• Files: TRIS
• Created Date: Apr 18 2005 12:00AM