Abutment

substructure at the ends of a bridge span or dam supporting its superstructure

In engineering, abutment refers to the substructure at the ends of a bridge span or dam.[1] This is where the structure's superstructure rests or contacts.[1] Single-span bridges have abutments at each end. These provide vertical and lateral (side to side) support for the bridge. They also act as retaining walls to resist lateral movement of the earthen fill of the bridge approach. Multi-span bridges require piers to support ends of spans that are not supported by abutments.[2] Dam abutments are generally the natural valley walls. They may also be artificial in order to support arch dams such as Kurobe Dam in Japan.[1][3]

The off-white concrete abutment gives vertical support to the small red bridge
Kurobe Dam rests on artificial concrete abutments

The term may also refer to the structure supporting one side of an arch,[4] or masonry used to resist the lateral forces of a vault.[5] The word derives from the verb "abut", meaning to "touch by means of a mutual border".

ReferencesEdit

  1. 1.0 1.1 1.2 "Glossary - "Abutment"". U.S. Bureu of Reclamation. Archived from the original on 25 December 2007. Retrieved 24 January 2015.
  2. Abbett, Robert W. (1957). American Civil Engineering Practice. Vol. III. New York: John Wiley & Sons. pp. 26-22&26-32.
  3. "関西電力 黒部川第四発電所 (Kurobe Kansaidenryoku Fourth plant)" (in Japanese). Suiryoku.com. Retrieved 24 January 2015.
  4. Beall, Christine (1987). Masonry Design and Detailing for Architects, Engineers and Builders. McGraw-Hill. p. 449. ISBN 0-07-004223-3.
  5. Pevsner, N. (1970) Cornwall; 2nd ed. Harmondsworth: Penguin; p. 245