Determine the load to be imposed on foundation - using

Question

Question 1:

A 2-m by square footing is located 1.5 m below the ground surface, as shown Figure

1. The groundwater table is located 2.5 m below the ground level. The subsoil consist of a uniform deposit of a uniform deposit of sand with Υ = 16 kN/m³

Υsat = 18.5 N/m³ a, c' = 0 and Φ = 38^o.

Determine the allowable load to be imposed on this foundation:

a) Using Meyerhof's method.

b) Using Terzaghi's method by considering General Shear Failure mode.

c) Using Terzadn's method by considering Local Shear Failure mode.

Question 2

Consider the combined footing shown in Figure below where column no. 1 (200mm x. 200mm) is located 240mm of a property line and column no 2 (250mm x 250mm) is at a dicrtance of 6.8 m, (center to center) from column 1. Column Loads; Colums no 1 = 500 kN column no.2 = 660 kN. Assume the calculated ultimate bearing, capacity is 180 kPa and a factor of saftey is 2.5

a.) Calculate the size of the required rectangular combined -footing.

b) Draw the shear force diagram and bending moment diagram for your footing.

c) Check if there exists any unbalanced moment.

Question 3

The cross section of a cantilever retaining wall is shown in Figure 3 below. Calculate the factors of safety with respect to overturning, sliding, and bearing capacity.