A square foundation is 3mx3m in plan. The soil supporting the foundation has a friction angle of Phi =21 degrees and C= 22 KN/m^2. The depth of foundation (Df) is 1.8 m and general shear failure occurs in the soil. If the water table is located at a depth of 2.5 m from the ground surface. Use the unit weight of soil (gamma) above the water, table as 17.5 KN/m^3 and the saturated unit weight of soil (gamma_Sat) is 19.5 KN/m^3. Use FS=4; Determine the maximum allowable load on the foundation using VESIC's Recommendations for water table correction.
A square foundation is 3mx3m in plan. The soil supporting the foundation has a friction angle of Phi =21 degrees and C= 22 KN/m^2. The depth of foundation (Df) is 1.8 m and general shear failure occurs in the soil. If the water table is located at a depth of 2.5 m from the ground surface. Use the unit weight of soil (gamma) above the water, table as 17.5 KN/m^3 and the saturated unit weight of soil (gamma_Sat) is 19.5 KN/m^3. Use FS=4; Determine the maximum allowable load on the foundation using VESIC's Recommendations for water table correction.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:A square foundation is 3mx3m in plan. The soil supporting the foundation has a
friction angle of Phi =21 degrees and C = 22 KN/m^2. The depth of foundation (Df) is
1.8 m and general shear failure occurs in the soil. If the water table is located at a depth
of 2.5 m from the ground surface. Use the unit weight of soil (gamma) above the water,
table as 17.5 KN/m^3 and the saturated unit weight of soil (gamma_Sat) is 19.5
KN/m^3. Use FS=4;
Determine the maximum allowable load on the foundation using VESIC's
Recommendations for water table correction.
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Step 1: Given:
VIEWStep 2: Calculate the effective unit weight of soil below the water table:
VIEWStep 3: Calculate the effective overburden pressure (sigma') at the depth of the foundation:
VIEWStep 4: Calculate the corrected cohesion (C'c):
VIEWStep 5: Calculate the corrected angle of internal friction (phi'):
VIEWStep 6: Calculate the corrected bearing capacity factor (Nc'):
VIEWStep 7: Calculate the corrected bearing capacity (q_ult'):
VIEWStep 8: Calculate the maximum allowable load (Q_ult):
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