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ThesisUniversity of Iceland>Verkfræði- og náttúruvísindasvið>Meistaraprófsritgerðir>

Please use this identifier to cite or link to this item: http://hdl.handle.net/1946/8985


Earth pressures against- and stability of retaining structures

June 2011

The objective of the presented research is to investigate methods used to calculate earth pressures against- and the stability of retaining structures.
The classical methods of calculating earth pressures are covered in detail. They are named after their creators Charles-Augustin de Coulomb and William John Macquorn Rankine. A special interest is taken in a variant of Rankine‟s theory developed at Norges teknisk- naturvitenskapelige universitet (NTNU) that incorporates cohesive properties of soils as well as roughness between the structure and the soil material. Both methods are then tested against each other in order to investigate if a clear link exists between the two. The methods are tested against proposed design values of earth pressure coefficients according to the design standard Eurocode 7.
Håndbok 016 is a design handbook published by the Norwegian Road Administration (n. Statens vegvesen). In it is a chapter dedicated to the design of retaining structures and bridge abutments. The methods proposed to design retaining structures are used to design cantilevered structures of various heights and with various foundation- and backfill materials based on a few geometrical constraints.
The structure designs created with methods in Håndbok 016 are modeled in the finite element program PLAXIS to test if the same material factors of safety could be derived that way.
The results from this study are then discussed and commented upon.

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