Development of a Time Domain Reflectometry System to Monitor Landslide Activity. List of Figures and Tables

Development of a Time Domain Reflectometry

System to Monitor Landslide Activity: Final Report -- FHWA/CA/TL-96/09

List of Figures and Tables

FIGURE 1-1. TDR Cable Installations in California as of 6/30/96.
FIGURE 1-2. Cross-section of Coaxial Cable FIG.
FIGURE 1-3. TDR Installed in Grouted Hole.
FIGURE 1-4. TDR Cable Signatures from Grapevine Landslide.
FIGURE 1-5. Inclinometer Profile for Levee (Kane et al.,1996).
FIGURE 1-6. Coaxial Cable in Levee Showing Development of Signature Spike (Kane et al. 1996).
FIGURE 2-1. Idealized Behavior of RG59/U Cable Ac Shear Plane.
FIGURE 2-2a. Comparison of TDR Signatures for Shear (a)
FIGURE 2-2b. and Extension (b) at Failure (Dowding et al., 1988).
FIGURE 2-3. Tensile Machine Including Cable and Extensometer Installation.
FIGURE 2-4. Typical Load-Displacement Curve Including Points where TDR Signatures were Recorded.
FIGURE 2-5. Typical TDR Signatures of a Tensile Test.
FIGURE 3-1. Aerial View of Interstate 5 Looking South into Grapevine Canyon.
FIGURE 3-2. Aerial Oblique View of Grapee Landslide.
FIGURE 3-3. Schematic of Grapevine TDR Installation.
FIGURE 3-4. Approximate Locations of TDR Cables on Grapevine Landslide (Not To Scale).
FIGURE 3-5. Photograph of Remote Data Acquisition Equipment Installed at Grapevine Site.
FIGURE 3-6. Identification of Remote Data Acquisition Components.
FIGURE 3-7. One Method to Modify NUTSA Signatures for Use in a Report Document.
FIGURE 3-8. Steps to Acquire Cable Signature Using Cable Tester and Laptop Computer.
FIGURE 3-9. Steps to Download Program to Datalogger.
FIGURE 3-10. Steps to Access Datalogger Directly.
FIGURE 3-11. TDR Signatures for Cable #1.
FIGURE 3-12. TDR Signatures for Cable #2.
FIGURE 3-13. TDR Signatures for Cable #3.
FIGURE D-1. SDM 1502 and CR10 Wiring Diagram.
FIGURE D-2. Cable Tester Power from CR10.
FIGURE D-3. Multiplexer/Datalogger Wiring.
FIGURE D-4. Datalogger/Relay Wiring.
FIGURE D-5. Cellular Phone System Wiring.
FIGURE D-6. Power Supply Wiring.
FIGURE D-7. TDR Coaxial Cable Wiring.
TABLE 2-1. Properties of RG59/U Coaxial Cable Used in Laboratory Testing.
TABLE 2-2. Tensile Test Results for Jacketed RG59/U Cable.
TABLE 2-3. Tensile Test Results for Unjacketed Cable.
TABLE 3-1. Types of Cables Used for Landslide Monitoring.
TABLE 3-2. TDR System Equipmen.
TABLE 3-3. Pin Configurations for Computer-Cable Tester Cables.
TABLE 3-4. Programs Used in TDR Data Acquisition and Reduction.

Last modified: 06-18-97