Choose the correct statement.
a. Alpha method is used for short-term analysis while beta method is used for long-term analysis.
b. Both alpha method and beta method can be used for long-term analysis.
c. Gamma method is used for short-term analysis while alpha or beta method is used for long-term analysis.
d. Alpha method is used for long-term analysis while beta method is used for short-term analysis.
e. Gamma method is used for long-term analysis while alpha or beta method is used for short-term analysis.
f. Both alpha method and beta method can be used for short-term analysis. End-bearing piles are to be constructed ina site with soil stratigraphy as follows (starting from the ground surface):
3 m layer of new fill, followed by 9 m layer of soft clay, followed by a deep layer of dense sand. The GWT is 2m below the ground surface. When we calculate the ultimate capacity of the pile, we should
a. Use the frictional capacity from all the layers in downword direction.
b. Use the frictional capacity from all the layers in upward direction.
c. Use the frictional capacity from the fill layer and the soft clay layer in downward direction but that from the dense sand layer in upward direction.
d. Use the frictional capacity from the fill layer in downward direction but that from the soft clay layer and dense sand layer in upward direction.
e. Use the frictional capacity from the the soft clay layer in downward direction but that from the fill layer and dense sand layer in upward direction.