Grenzen der Anwendbarkeit der DIN 4019 für geschichtete Böden

Limits of the applicability of DIN 4019 for layered soils.

Conventional calculations of settlement and rotation of foundations are based on solution of linear elasticity. It is assumed that the distribution of vertical stresses in the soil is independent of the constrained modulus and the Poisson's ratio. For soils with irregular stratigraphy and a stiffer upper layer, as this may occur after ground improvement, these solution algorithms yield inaccurate results leading to uneconomical design. The paper elucidates the background by means of a calculation example.