Experimentelle und numerische Untersuchungen zum Kompressionsverhalten von Sand‐Schluff‐Gemischen.

Compression behavior of sand‐silt mixtures The choice of an appropriate material model for mixed‐grained soils is crucial for the design of a challenging geotechnical structe. For the development of an accurate material model, the experimental investigation of the soil is indispensable. Hereby, the compression behavior of sand‐clay mixtures is investigated on the basis of oedometer tests of mixtures with different fines contents. It can be observed that with increasing fines content, the compressibility of the material increases significantly. Nevertheless, an exponential relationship between equivalent void ratio e* and vertical strain has been established independently of the fines content. On this course, the deformation model of Ohde (1939) was generalized to mixtures by considering e*. The simulations with hypoplasticity for granular soils and with the AVISA‐model for fine‐grained soils show a need for the coupling of the preconsolidation pressure as well as the normal consolidation line at a 1:1 ratio of sand to silt depending on the fines content. [ABSTRACT FROM AUTHOR]