Caisson
Caissons are cylindrical, site-cast concrete foundations used for deep foundations, penetrating weak soil to rest on stable rock or soil layers.
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Definition
A caisson is a cylindrical, site-cast concrete foundation that penetrates through unsatisfactory soil to rest upon an underlying stratum of rock or satisfactory soil. It is a type of drilled or augered piling.
Purpose
Caissons are used to create deep foundations for structures that require support in areas with weak or unstable soil. They provide stability by transferring loads to more stable soil or rock layers deeper underground.
Examples of Use
- Bridge Foundations: Supporting the piers of bridges.
- High-rise Buildings: Providing deep foundations for tall structures.
- Marine Structures: Stabilizing piers and docks in water.
Related Terms
- Piling: Long, slender columns driven into the ground to support structures.
- Foundation: The base upon which a structure is built.
- Drilled Shaft: A type of deep foundation similar to caissons but often of larger diameter.
Notes
Proper design and installation of caissons are crucial to ensure the stability and longevity of the structure they support. Geotechnical investigations are often necessary to determine the appropriate depth and specifications.
Related Terms
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