Soil Mechanics Exam 2
The total settlement of a soil is made up of various components, which are...... -
✔️✔️Secondary Settlement
Immediate Settlement
Consolidation Settlement
T/F: The increase in vertical stress due to a foundation load, Δσ, should be calculated at
the same location within the clay layer that the pre-consolidation stress, σ'p, and vertical
effective stress, σ'v, are calculated when determining settlement. - ✔️✔️True
T/F: Hydraulic gradient, i, is defined as the energy or head loss, h, per unit length, l. -
✔️✔️True
Hydraulic conductivity, or permeability, depends on the following: - ✔️✔️Degree of Soil
Saturation
Void Ratio
Grain size distribution
Pore size distribution
T/F: There is a direct relationship between porosity and hydraulic conductivity. -
✔️✔️False
T/F: Liquefaction, or quicksand, occurs when the effective stress is less than zero. -
✔️✔️False
T/F: Seepage forces, which may cause quicksand to develop, are always present in
soils where there is a gradient causing the flow of water. - ✔️✔️True
T/F: The water level in a piezometer directly reads the total head at the point of interest.
- ✔️✔️False
T/F: Most settlements that occur in fine-grained, clayey soils, are immediate. -
✔️✔️False
When a soil is loaded, it will compress because of... - ✔️✔️Compression of air and
water in the voids
Deformation of soil grains
Squeezing out of water and air from the voids
The slope of the normally consolidated portion (otherwise known as virgin compression)
of the experimental laboratory consolidation curve in the vertical strain versus long
effective consolidation stress realm is denoted as........ - ✔️✔️CR
The total settlement of a soil is made up of various components, which are...... -
✔️✔️Secondary Settlement
Immediate Settlement
Consolidation Settlement
T/F: The increase in vertical stress due to a foundation load, Δσ, should be calculated at
the same location within the clay layer that the pre-consolidation stress, σ'p, and vertical
effective stress, σ'v, are calculated when determining settlement. - ✔️✔️True
T/F: Hydraulic gradient, i, is defined as the energy or head loss, h, per unit length, l. -
✔️✔️True
Hydraulic conductivity, or permeability, depends on the following: - ✔️✔️Degree of Soil
Saturation
Void Ratio
Grain size distribution
Pore size distribution
T/F: There is a direct relationship between porosity and hydraulic conductivity. -
✔️✔️False
T/F: Liquefaction, or quicksand, occurs when the effective stress is less than zero. -
✔️✔️False
T/F: Seepage forces, which may cause quicksand to develop, are always present in
soils where there is a gradient causing the flow of water. - ✔️✔️True
T/F: The water level in a piezometer directly reads the total head at the point of interest.
- ✔️✔️False
T/F: Most settlements that occur in fine-grained, clayey soils, are immediate. -
✔️✔️False
When a soil is loaded, it will compress because of... - ✔️✔️Compression of air and
water in the voids
Deformation of soil grains
Squeezing out of water and air from the voids
The slope of the normally consolidated portion (otherwise known as virgin compression)
of the experimental laboratory consolidation curve in the vertical strain versus long
effective consolidation stress realm is denoted as........ - ✔️✔️CR
