Introduction to Deep Foundations
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Questions and Answers

What is the purpose of deep foundations?

To transfer loads to deeper hard strata

How do deep foundations differ from shallow foundations?

Deep foundations extend into deeper, more stable layers, unlike shallow foundations that rely on surface soils.

What are the types of deep foundations mentioned in the text?

Piles, drilled piers, or caissons

When is a bored-cast-in-situ pile sometimes referred to as a drilled pier?

<p>When its diameter is greater than about 0.75 m</p> Signup and view all the answers

Why are deep foundations important in construction?

<p>To ensure the stability and safety of structures</p> Signup and view all the answers

What are driven piles made of?

<p>Concrete, steel, timber, etc.</p> Signup and view all the answers

What is a pier generally termed as if it has a diameter greater than 0.6m?

<p>Pier</p> Signup and view all the answers

When is a pier belled to increase load-bearing capacity?

<p>When the stratum doesn’t have adequate bearing capacity, especially in cohesive soils</p> Signup and view all the answers

What type of soils can undergo significant volume changes with variations in moisture content?

<p>Soils with high clay content</p> Signup and view all the answers

Why are deep foundations necessary in urban environments?

<p>To offer a practical solution for constructing stable and tall structures due to limited space and uncertain load-bearing capacity of surface soils</p> Signup and view all the answers

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