Question

A factory contacted a Geotechnical consultant to design foundation of the tall chimney to take care of flue gases formed during the tiles production. As per design of the Geotechnical Engineer, the chimney should have a square footing of 3.0 m side constructed at a depth of 2.50 m in the sub soil. It was found from the results of the laboratory test on the sample of sub-soil that the shear strength parameters in the form of angle of internal resistance and the cohesion intercept are 36’ and 5 N/m respectively. The moist unit weight is equal to 18.0 kN/m . The chimney is carrying a concentrated load of 5000kN and two horizontal components of load of 200 kN acting at the height of 4.5 m perpendicular to length of the footing and 3.5 m perpendicular to the width of the footing measured from the base of footing.

. Calculate the ultimate bearing capacity of the soil and factor of safety by using the above suggested analysis.

Answer 1