Question

In: Civil Engineering

A 3 meter-thick layer of clay, with a void ratio of 1.4 and compression index, recompression...

A 3 meter-thick layer of clay, with a void ratio of 1.4 and compression index, recompression index, and coefficient of consolidation of 0.35, 0.02, and 0.5 m2/year, respectively, carries an effective overburden pressure of 85 kPa. The clay layer is located between two sand layers. Calculate the change (reduction) in thickness of the clay layer if pressure is increased to 105 kPa considering the following conditions: 1- Clay is normally consolidated. 2- Clay has an OCR of 1.15. 3- Clay has an OCR of 1.25 -Determine the time needed to reach 50% degree of consolidation. -What would be the reduction in thickness after 8 months of the loading increase in case “1”?

Solutions

Expert Solution


Related Solutions

(a) At a reclamation site, a 6-m thick sand layer overlies a 5.8-m thick clay layer,...
(a) At a reclamation site, a 6-m thick sand layer overlies a 5.8-m thick clay layer, which is underlain by impermeable rock stratum. The water level is initially 2.5 m above the ground surface. The saturated unit weights of sand and clay are 19 kN/m3 and 17 kN/m3, respectively. A 5-m thick layer of fill will be placed on the original ground surface, and the unit weights of fill are 19 kN/m3 and 20 kN/m3 above and below water table,...
A 20 m thick saturated clay layer is normally consolidated. At mid-depth in this layer, the...
A 20 m thick saturated clay layer is normally consolidated. At mid-depth in this layer, the void ratio (e) is 1.110, the coefficient of compressibility (av) is 5.74 x103 cm2=N. Recall that w = 9.81 kN/m3. a) Assuming that a 122 cm lowering of the ground water table (GWT) occurs in the soil overlying the clay layer, what settlement will occur in the soil overlying the clay layer because of the ultimate primary consolidation of the clay layer? Express your...
A clay layer in field is 3-m thick and is sandwiched between two sand layers (drained...
A clay layer in field is 3-m thick and is sandwiched between two sand layers (drained from top and bottom). The saturated stratum of clay is under a surcharge loading and underwent 90% primary consolidation in 75 days. The time required in minutes for a 30 mm thick undisturbed clay sample obtained from the field to undergo 90% consolidation in laboratory is most nearly equal to Select one: a. 28 b. 67.5 c. 100 d. 10
An ideal dual cycle has a compression ratio of 15 and a cutoff ratio of 1.4....
An ideal dual cycle has a compression ratio of 15 and a cutoff ratio of 1.4. The pressure ratio during constant-volume heat addition process is 1.1. The state of the air at the beginning of the compression is P1 = 98 kPa and T1 = 24°C. Calculate the cycle’s net specific work, specific heat addition, and thermal efficiency. Use constant specific heats at room temperature.
A layer of soft, normally consolidated clay is 15 m thick and lies under a newly...
A layer of soft, normally consolidated clay is 15 m thick and lies under a newly constructed building. The overburden pressure of the sand overlying the clay layer is 500 kN/m2 and the new construction increases it by 180 kN/m2. If the compression index is 0.25 and the recompression index is 0.015, compute the settlement of the building. The water content of the clay is 30%, the specific gravity of the soil grains is 2.7, and the clay is fully...
The clay layer of 6 m thick is located under the gravel ground of 12 m...
The clay layer of 6 m thick is located under the gravel ground of 12 m thick. The water table lies 4m below the ground surface. It is because the bag is 0.30 for dry gravel floor, the dry unit volume weight is 16.2 kN / m3, the undrained shear strength for clay floor is 20 kPa, 24o for friction and 17.6 kN / m3 for saturated unit volume. According to doing; Based on the shear strength of the ground...
The soil profile at a site consists of a clay layer 10 m thick, sandwich between...
The soil profile at a site consists of a clay layer 10 m thick, sandwich between two sand layers. The top sand layer has a density of 1.9 Mg/m3 and is 5 m thick. Below this layer is a 10 m thick clay layer with a saturated density of 1.8 Mg/m3 and a saturated water content 42%. The deeper sand layer has a saturated density of 1.9 Mg/m3 and extend to the depth investigated at the site. The water table...
The soil profile at a site consists of a clay layer 10 m thick, sandwich between...
The soil profile at a site consists of a clay layer 10 m thick, sandwich between two sand layers. The top sand layer has a density of 1.9 Mg/m3 and is 5 m thick. Below this layer is a 10 m thick clay layer with a saturated density of 1.8 Mg/m3 and a saturated water content 42%. The deeper sand layer has a saturated density of 1.9 Mg/m3 and extend to the depth investigated at the site. The water table...
The soil profile at a site consists of a clay layer 10 m thick, sandwich between...
The soil profile at a site consists of a clay layer 10 m thick, sandwich between two sand layers. The top sand layer has a density of 1.9 Mg/m3 and is 5 m thick. Below this layer is a 10 m thick clay layer with a saturated density of 1.8 Mg/m3 and a saturated water content 42%. The deeper sand layer has a saturated density of 1.9 Mg/m3 and extend to the depth investigated at the site. The water table...
3 Question 3: In an air standard Diesel cycle with compression ratio 14, the conditions of...
3 Question 3: In an air standard Diesel cycle with compression ratio 14, the conditions of the air at the start of compression stroke are 1 bar and 300 K. After addition of heat at constant pressure, the temperature rises to 2774 K. Determine: a) the thermal efficiency of the cycle b) the net work done per kg of air and the c) mean effective pressure
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT