Rückverankerte Betonsohlen - Nachweise in den Grenzzuständen UPL, GEO-2 und STR

Anchored concrete base slabs - Structural analysis in limit states UPL, GEO-2 and STR

Anchored concrete base slabs are used as base sealing against pressurized groundwater e. g. at watertight excavations. Anchored concrete base slabs allow a minimum effect on groundwater.
Anchored concrete base slabs are sophisticated engineering structures. The ultimate limit states by loss of static equilibrium due to uplift as well as anchorage failure are based on DIN EN 1997-1. The ultimate limit state of structural failure considering the concrete base slab is based on DIN EN 1992-1-1.
In this paper the normative basics are compiled and their application is illustrated with an example. Besides the analysis based on the currently valid regulations a mechanical model for the load transfer in the concrete base is shown. The structural behavior of the generally non-reinforced base slabs is shown taking stabilizing effects along the edges as well as the distinction between peripheral and central region and the results from the slenderness ratio of the base slab into consideration.
This paper refers to a paper from 2008 in this journal [3]. It features the changes through the introduction of the Eurocodes and the ultimate limit state of the concrete base.