ENGINEERING PROPERTIES OF FINE-GRAINED MISSISSIPPI VALLEY ALLUVIAL SOILS MEANDER BELT AND BACKSWAMP DEPOSITS.
ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MISS
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A brief review of the geologic soil types in the Lower Mississippi Valley is presented with emphasis on the backswamp and channel-filling deposits which provide the majority of engineering data available on fine-grained alluvial soils. Information is presented concerning the variation of pertinent engineering properties with depth. Detailed data from typical borings for four projects located in backswamp deposits and for four projects located in channel-filling deposits are presented, and conclusions are drawn concerning the general character of these two types of deposits. The data indicate that backswamp deposits generally are overconsolidated, presumably because of desiccation, whereas channel-filling deposits in the zone below periodic desiccation are normally consolidated. The undrained shear strength of the backswamp deposits varies over a wide range, and is affected considerably by the amount of fissures in the soil. Author
- Soil Mechanics
- Construction Equipment, Materials and Supplies