Questions from Geotechnical Engineering

Q: A shallow foundation supported by a silty sand is shown in Figure

A shallow foundation supported by a silty sand is shown in Figure 11.6. Given: Length: L = 3 m Width: B = 3 m Depth of foundation: Df = 1.5 m Thickness of foundation: t = 0.25 m Load per unit area: ...

Q: Following are the results of a laboratory consolidation test on a sample

Following are the results of a laboratory consolidation test on a sample of undisturbed clay obtained from the field The height of the specimen at the beginning of the test was 1.9 cm, and the diame...

Q: Refer to Problem 12.6. Given: cv = 2

Refer to Problem 12.6. Given: cv = 2.8 × 10– 6 m2 /min. How long will it take for 60% consolidation to occur?

Q: Following are the relationships of e and ’for a clay soil

Following are the relationships of e and ’for a clay soil. For this clay soil in the field, the following values are given: H = 4.5 ft, â&...

Q: The coordinates of two points on a virgin compression curve are as

The coordinates of two points on a virgin compression curve are as follows. e1 = 1.7 ’ 1 = 150 kN/m2 e2 = 1.48 ’ 2 = 400 kN/m2 Determine the coefficient of volume compressibility for the pres...

Q: The moist unit weights and degrees of saturation of a soil are

The moist unit weights and degrees of saturation of a soil are given in the table. Determine: e Gs

Q: The time for 50% consolidation of a 1 in. thick

The time for 50% consolidation of a 1 in. thick clay layer (drained at top and bottom) in the laboratory is 2 min, 20 s. How long (in days) will it take for an 8 ft thick layer of the same clay in the...

Q: For a normally consolidated clay, the following are given.

For a normally consolidated clay, the following are given. ’ o = 2 ton/ft2 e = eo = 1.21 ’ o + ’ = 4 ton/ft2 e = 0.96 The hydraulic conductivity k of the clay for the preceding loading rang...

Q: For a laboratory consolidation test on a clay specimen (drained on

For a laboratory consolidation test on a clay specimen (drained on both sides), the following were obtained. Thickness of the clay layer = 25 mm ’ 1 = 200 kN/m2 e1 = 0.73 ’ 2 = 400 kN/m2 e2 = 0....

Q: The time for 50% consolidation of a 25 mm thick clay

The time for 50% consolidation of a 25 mm thick clay layer (drained at top and bottom) in the laboratory is 225 s. How long (in days) will it take for a 2 m thick layer of the same clay in the field (...