Geotehnička svojstva lesa okoline Beograda

Geological properties of Loess of the Belgrade surroundings

Abstract

The results of systematic, extensive investigations of Belgrade's loess, both from plateaus and slopes, are presented. A large number of triaxial compression (CD) tests, have been performed on representative samples. Tiie results obtained show that the mechanical behaviour of macroporous loess highly depends on the value of the consolidation pressure. So, in a case of "low" stresses its behaviour is stiff, while for "high" ones it behaves like a plastic material. In order to represent it we used two hyperbolic models: one is over a range of ”low" and the other of "high" stresses. In that way, for the first time, stress—strain relationships of macroporous loess are determined and presented by hyperbolic models. The comparison of numerical and experimental results shown that the proposed finite element procedure can accurately represent the behaviour of macroporous loess under complex stress—strain conditions.