Abutment
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An abutment is an end support of a bridge superstructure.
Abutments are used for the following purposes:
- to transmit the reaction of superstructure to the foundations
- to retain the earth filling
- to connect the superstructure to the approach roads
An abutment is also, generally, the point where two structures or objects meet.
Specifically, an abutment may be:
- the part of a structure that supports an arch
- the tooth or teeth that support a fixed or removable bridge. It can be used between an implant and the crown.
Abutment is also a term used by civil engineers in dam construction; moving water from a large reservoir to a channel such as a spillway, there are smooth transition walls at both sides named abutments which minimize the water's energy loss.
Abutment is also a technical mathematical term; it means the final 'sheet' in a spectral sequence.
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