A foundation connects a structure to the ground—or, in some cases, to water—and transfers the structure’s loads safely to its supporting surface. This lesson explains why foundations are essential and the basic requirements that help them remain stable over time.
A foundation is the element at the base of a structure that connects it to the ground. In most buildings, it transfers loads into soil or rock. Some structures, such as floating buildings and certain bridges, are supported by a foundation on water.
All flashcards
What is a foundation in engineering?
It is the element that connects a structure to the ground, or sometimes to water, and transfers the structure’s loads to that support.
What is foundation engineering?
It is the application of soil mechanics and rock mechanics, within geotechnical engineering, to the design of foundation elements.
What is bearing capacity?
Bearing capacity describes the ability of the supporting soil or rock to carry the loads applied by a foundation.
How does differential settlement differ from uniform settlement?
Differential settlement is uneven: one part of the foundation settles more than another. Uniform settlement is movement that occurs more evenly across the foundation.
Name four purposes of foundations.
They distribute structural weight, help anchor structures against natural forces, provide a level construction surface, and can limit lateral movement. They may also help address ground-related effects such as frost heave.
Quiz questions
Which description best characterizes a shallow foundation?Answer: It transfers loads to soil or bedrock near the ground surface.
What is the main function of a deep foundation?Answer: To carry loads through weaker upper soil to a stronger layer below.
Which statement describes a floating foundation?Answer: It is supported by a body of water rather than dry land.
Which feature is characteristic of a rubble-trench foundation?Answer: A shallow trench is filled with rubble or stones and extends below the frost line.
Which task is most directly associated with a geotechnical engineer in foundation design?Answer: Evaluating the ground and the capacity of the foundation support.