Consolidated-Undrained Triaxial Creep Tests of St. Charles Parish Lakefront Foundation Clays.
ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MISS
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The design, construction, and maintenance of levees on the soft plastic clay soils of the Atchafalaya River floodway have posed a problem for many years because of large settlements on the order of 10 to 20 ft. Some settlement is attributed to consolidation by dissipation of excess pore water pressure, but a substantial amount results from creep, a continuous no volume change, time-dependent deformation under a sustained shearing stress. Preliminary long-term creep tests were performed on specimens of the St. Charles Parish Lakefront soils to evaluate testing equipment and to determine general trends in long-term creep behavior. The tests were performed in standard triaxial cells with some modifications. Results of the tests indicated that the temperature control system to reduce temperature-induced variations in pore water pressures was satisfactory. The frictionless seals adopted to minimize friction between the loading rod and the piston housing of the chamber were also satisfactory.
- Soil Mechanics
- Civil Engineering