Abutment (bridge construction)

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Bridge abutments before backfilling
Fighter foundation or abutment of the arch of the Froschgrundsee viaduct

In bridge construction, an abutment is a component that creates the transition between the bridge structure and the earth dam .


The abutment carries the end of the bridge superstructure and diverts the vertical and any horizontal forces from the bridge superstructure into the subsoil. In addition, it secures the earth dam in its position in the transition area to the bridge superstructure by absorbing earth pressure forces .

Abutments of girder bridges usually consist of the foundation and the abutment walls , possibly with a support bank for the bearings and mostly with side wing walls.

The name originates from the arch bridges , in which the arch end for removal of the horizontal and vertical forces from the vault thrust abutment, usually today fighters foundations called, supported on the ground.

Support cuboid

An abutment made of a natural stone for bridges is called a support cuboid . It is a stone block that takes the load of a steel or wooden bridge, for example. This stone of the historical bridge construction is subject to particularly high requirements in terms of pressure and weather resistance . The size of the cuboid must be determined according to the forces to be expected.

Individual evidence

  1. ^ A b c Gerhard Mehlhorn, Ekkehard Fehling, Walter Schreiber: Massivbrücken . University of Kassel, lecture reprint SS1999, p. 179 ff.
  2. ^ Albrecht Germann, Ralf Kownatzki, Günter Mehling (eds.): Natural stone lexicon. P. 29., 5. completely revised. and act. Ed., Callwey, Kempten 2003. ISBN 978-3-7667-1555-5