Building Construction
During percussion drilling

The soil to a considerable depth below the bottom of the hole gets disturbed
All listed here
Ground water observations are hindered due to entry of the slurry in the soil below the bottom of the hole
Caving or mixing of strata are caused in soft soils or cohesion-less soils

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Building Construction
Two columns 50 cm × 50 cm and 60 cm × 60 cm carry 80 tonnes and 120 tonnes of loads respectively. The centre to centre distance between columns is 5.00 metres. The permissible bearing capacity of the soil is 20 t/m2. If the footing is not to project more than 25 cm beyond the outside of the smaller column, pick up the correct design parameters of the footing from the following:

The length of the foundation slab = 7.00 m
Distance of
All listed here
G. of the loads from the smaller column = 3.00 m
Area of footing slab = 11.00 m2

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