Study of Clay Shale Slopes Along the Panama Canal. Report 1. East Culebra and West Culebra Slides and the Model Slope,
Abstract
A detailed study of the East Culebra and West Culebra slides and the Model Slope was performed as the first phase of a comprehensive study of slope failures in clay shale and of factors contributing to failure of slopes along the Gaillard Cut section of the Panama Canal. The study includes a review of historical records, geologic, field and laboratory investigations, and stability analyses. Slope indicator data proved useful in defining present depths of sliding. Piezometric levels were generally below the water level in the canal, indicating that pore pressures have not yet reached equilibrium and that a continued decrease in strength of the clay shale may occur. Stability analyses for initial slope failures at the East Culebra and West Culebra slides indicate field shear strength of 0' = 19 deg and c' nearly equal to 0 at the time of initial failure. Extrapolation of these strength parameters and of 1947 strength criteria indicates that 1947 strengths are significantly conservative for slopes on the order of 600 ft but not for slopes about 300 ft and lower. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1970
- Accession Number
- AD0715977
Entities
People
- Don C. Banks
- Richard J. Lutton