Soil Properties I

Soil Properties I - Soil Properties I Foundation Design CE...

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Unformatted text preview: Soil Properties I Foundation Design CE 482 Impact of Soil Properties on Foundation Design Subsurface conditions geology, groundwater Strength and stress/strain properties of subsurface materials Constructability Geotechnical Engineering Properties of Soil Expensive to directly evaluate in the field or in the laboratory Particle size distribution Plasticity Compressibility Shear strength Geotechnical Properties of Soil Correlation with published data/prior experience offers alternative Soil deposits are not generally homogeneous or isotropic Limitations on relying solely on published data Importance of source, deposition, and stress history Correlation Extrapolate experience with a soil type to similar soil type Assumption Clays at my site behave like similar clays Sands at my site behave like similar sands Required information Material (soil) type Deposition and stress history Moisture content Groundwater level Clay Clay Silt Sand Gravel Cobbles Boulders Boulders Particle Size Distribution Sieve analysis: granular soils Hydrometer analysis: fine-grained soils Sieve Analysis Sieve Analysis Sieve Analysis Hydrometer Hydrometer Hydrometer Settling velocity of particles due to gravity from Stokes Law: Size Limits AASHTO, MIT Size Limits Unified Soil Classification Gradation Coefficients Weight-Volume Relationships Required information Material (soil) type Deposition and stress history Moisture content Groundwater level Weight-Volume Relationships 3-phase system solid void space water air Phase Relationships...
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Soil Properties I - Soil Properties I Foundation Design CE...

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