Accession Number : AD0715977

Title :   Study of Clay Shale Slopes Along the Panama Canal. Report 1. East Culebra and West Culebra Slides and the Model Slope,

Corporate Author : ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MISS

Personal Author(s) : Lutton,Richard J. ; Banks,Don C.

Report Date : NOV 1970

Pagination or Media Count : 385

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)

Descriptors :   (*TERRAIN, STABILITY), (*INLAND WATERWAYS, AVALANCHES), CLAY, SHALE, PANAMA, SHEAR STRESSES, ENGINEERING GEOLOGY, STRUCTURAL GEOLOGY, FAULTS(GEOLOGY), DEFORMATION, PLASTIC PROPERTIES, TABLES(DATA), REVIEWS

Subject Categories : Soil Mechanics
      Civil Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE