PILES

Piles are structural members made of

• STEEL

• CONCRETE

• TIMBER

• ALL OF THE ABOVE

Which of the following foundations will have cost?

• Pile Foundation

• Strip Footing

• Square Footing

• Mat Foundation

Pile foundations may not be considered when

• upper soils layer(s) is (are) highly compressible and too weak to support the load the superstructure.

• to horizontal and uplifting forces

• bedrock is present near the ground surface

• soil is expansive and collapsible to a great depth below the ground surface

In general, the ultimate pile load is equal to

• load carried at the pile point.

• carried by skin friction developed at the side of the pile.

• load carried at the pile point and the load carried by skin friction the side of the pile.

• none of the above

The length of friction piles on

• shear strength of soil

• applied load.

• pile size

• all

Which of the following piles is a non-displacement pile?

• driven

• concrete

• closed ended

• bored

When the ultimate load is applied to the pile, the soil at the pile tip fails mostly in a ____ shear failure.

• .general

• local

• punching

• none

The factor of safety generally used to determine the allowable load-carrying capacity of a

pile form its ultimate load-carrying capacity ranges from

• 1 to 2.5

• 2.5 to 4

• 4-6

• none

For piles in saturated clays in undrained condition, the load-carrying capacity of the pile

• 
• 
• 
• 

The downward drag force exerted on the pile by the soil surrounding it is called

• drag force

• skin friction

• negative skin friction

• positive skin friction