What reasons would piles be used in the construction of a foundation for a structure rather than a shallow foundation?
1. When strata below the ground is highly compressible and weak to support load.
2.Transfer of load through deep water to a firm stratum
3.In order to reduce differential settlement ( in case of relative irregular load distribution)
4.Mostly in expansive soils with undergoes swell and shrink ,piles transfer the load below the active zone.
5.In case of erodible soils piles are more sustainable.
6.In case of tall structures subjected to horizontal loads(wind load,earthquake load)
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