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Badania charakterystyk odkształceniowych gruntów słabonośnych

Drożdż A.

Przegląd Naukowy Inżynieria i Kształtowanie Środowiska

2006

Vol. 15, No. 1

53--63

Construction of structures on soft organic soils gives rise to special problems. The most obvious ones are large deformations that may occur during and after the construction period, both vertically and horizontally. The settlements often appear quickly but may also continue for very long time periods due to secondary compression. In this paper the results of laboratory tests of peat and calcareous soil samples to define deformation characteristics are presented. Laboratory tests were com prised of oedometer and triaxial tests. Deformation characteristics obtained in laboratory tests were used for determination of variability in deformation modulus describing the deformation process in soft soils. The results of laboratory tests perform ed for organic soils indicate the different character of variation in parameters values which depends on effective stress components. It is important to know that the rate of strain can inereasing or decreasing during the creep phase. It depends on level of deviatoric stress. In final effect the inereasing of rate can lead to soil failure.