Building Construction
In case of foundations on black cotton soils, the most suitable method to increase the bearing capacity of soils is to

Drain the soil
Compact the soil
Replace the poor soil
Increase the depth of foundation

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Building Construction
Grillage foundation

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

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