What is the term for the continued driving of piles after they have reached an obstruction or impenetrable layer?

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Multiple Choice

What is the term for the continued driving of piles after they have reached an obstruction or impenetrable layer?

Explanation:
Continued driving after a pile hits a hard obstruction or impenetrable layer is called overdriving. When the pile refuses, pushing it further can drive the tip into the hard layer, causing excessive penetration, possible pile damage, and disturbance of the surrounding soil, which can actually reduce or unpredictably alter the pile’s bearing capacity. The other terms don’t describe this behavior: an overlay is a pavement surface layer, NCHRP is an organization/program, and “on the overpass” is not a technical term for pile driving.

Continued driving after a pile hits a hard obstruction or impenetrable layer is called overdriving. When the pile refuses, pushing it further can drive the tip into the hard layer, causing excessive penetration, possible pile damage, and disturbance of the surrounding soil, which can actually reduce or unpredictably alter the pile’s bearing capacity. The other terms don’t describe this behavior: an overlay is a pavement surface layer, NCHRP is an organization/program, and “on the overpass” is not a technical term for pile driving.

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