Under reamed piles are normally bored _ piles.Ĭlarification: Under reamed piles are bored cast-in-situ concrete piles having one or more bulbs formed by enlarging the bore hole.Ĩ.

The maximum spacing of the under-reamed pile should not normally exceed _Ĭlarification: The maximum spacing of the under-reamed pile should not normally exceed 2½ m as to avoid heavy capping beams.ħ. The under-reamed piles are connected by a beam known as _Ĭlarification: The under-reamed piles are connected by a reinforced concrete beam, known as capping beam or grade beam.Ħ. The load carrying capacity of a under-reamed pile may be determined by _Ĭlarification: The load carrying capacity of an under-reamed pile may be determined from safe load test, in the absence of actual test.ĥ. Under-reamed pile foundation is most suitable for _ type of condition.Ĭlarification: The under-reamed pile foundation find application in widely varying situations in a type of soils where foundation are required to laid on undesirable effect of seasonal moisture change as in expansive soils.Ĥ. However, it may vary from 2 to 3 times the stem diameter of pile steam.ģ. The diameter of the under-reamed pile is kept equal to _ times the diameter of pile steam.Ĭlarification: Generally the diameter of the under-reamed pile bulb is kept equal to 2.5 times the diameter of pile steam. When the under-reamed pile has only one bulb, it is called _Ĭlarification: When the pile has only one bulb, it is known as single-under reamed pile, while the pile with more than one bulb is known as multi-under reamed pile.Ģ. Geotechnical Engineering Multiple Choice Questions on “Under-Reamed Pile Foundations”.ġ.

Under reamed pile foundation