REBOUND OF A DEEP SHALE CUT

A research investigation was conducted of earth movements resulting from a deep highway cut in the Ridge Route shale formation (located 40 miles north of Los Angeles). Subsurface benchmarks and extensometers were used to measure vertical and horizontal rebound of the bottom and sides of the cut. Laboratory and field tests were run on material sampled to determine values of elastic moduli. Estimates of rebound using the Westergaard model were compared with measured rebound. Results were inconclusive due to problems in establishing boundary conditions for determining analysis of an infinite elastic system. /FHWA/

• Corporate Authors:

  California Department of Transportation

  Transportation Laboratory
  5900 Folsom Boulevard
  Sacramento, CA  United States  95819
• Authors:
  • Forsyth, R A
  • Smith, R E
  • Cortright, D J
• Publication Date: 1975-3

Media Info

• Pagination: 75 p.

Subject/Index Terms

• TRT Terms: Benchmarks; Boundary value problems; Earth movements; Excavations; Extensometers; Field tests; Geological surveying; Laboratory tests; Modulus of elasticity; Rebound; Shale
• Uncontrolled Terms: Boundary conditions; Earth movements; Field measurements
• Old TRIS Terms: Subsurface explorations
• Subject Areas: Geotechnology; Highways;

Filing Info

• Accession Number: 00098984
• Record Type: Publication
• Source Agency: Federal Highway Administration
• Report/Paper Numbers: CA-DOT-TL27220107511
• Contract Numbers: D-5-10
• Files: TRIS, USDOT, STATEDOT
• Created Date: Oct 18 1975 12:00AM