Building Construction
During percussion drilling

All listed here
The soil to a considerable depth below the bottom of the hole gets disturbed
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
Grillage foundation

Is used to transfer heavy structural loads from steel columns to a soil having low bearing capacity
Is light and economical
All listed here
Does not require deep cutting as the required base area with required pressure intensity is obtained at a shallow depth

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