Soil Mechanics Questions and Answers Fully Solved 100%
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Course
Soil Mechanics
Institution
Soil Mechanics
accuracy of k determined in lab depends on 6 variables - ️️temperature of fluid,
viscosity of fluid, trapped air bubbles present in soil specimen, degree of saturation of
the soil specimen, migration of fines during testing, and duplication of field conditions in
the lab
boutwell permeamete...
Soil Mechanics
accuracy of k determined in lab depends on 6 variables - ✔️✔️temperature of fluid,
viscosity of fluid, trapped air bubbles present in soil specimen, degree of saturation of
the soil specimen, migration of fines during testing, and duplication of field conditions in
the lab
boutwell permeameter - ✔️✔️hole is drilled and casing placed in it. casing filled with
water and falling-head permeability test is conducted, hole is deepened, repeat
hydraulic gradient - ✔️✔️i = ∆h/L
Darcy's Law - ✔️✔️discharge velocity of water through saturated soils
v = ki k is hydraulic conductivity (coefficient of permeability)
seepage velocity - ✔️✔️velocity of water through void space
constant-head test - ✔️✔️laboratory determination of hydraulic conductivity where the
difference of head between inlet and outlet remains constant
falling-head test - ✔️✔️laboratory determination of hydraulic conductivity where water
from a standpipe flows through a soil. head difference and time are recorded at t1 and
t2
hydraulic conductivity and void ratio for granular soils - ✔️✔️increases linearly
3 methods to estimate in situ hydraulic conductivity of compacted clay soils -
✔️✔️boutwell permeameter, constant-head borehole permeameter, porous probes
Permeability - ✔️✔️soils permeable due to existence of interconnected voids through
which water can flow from high energy points to low energy points
constant-head borehole permeameter - ✔️✔️constant head is maintained by supplying
water, rate of flow q is measured
porous probes - ✔️✔️driven into soil, constant or falling-head permeability test is
performed
laboratory consolidation tests - ✔️✔️hydraulic conductivity of saturated cohesive soils
can be determined
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