Erddruckmessung in einer Sandkiste nach EN 489

In the past, sand boxes were often used to investigate the interaction behavior between pipes and soil. Pipes were installed in a bedding material and the soil mechanical contact behavior was studied in experimental test series. It was assumed that the use of pipes with commercial diameters is an experimental boundary condition in which scale effects can be largely neglected. In this context, a sandbox can hardly account for the fact that a pipeline is a line structure. The reason for this lies primarily in stress redistributions, which develop differently in sandboxes than in situ due to the limited dimensions. At HafenCity University, earth pressure measurements were carried out in a sand box for standard tests according to EN489. The results show that the earth pressures are dependent on the position and the installation conditions. The reason for this is assumed to be the formation of an arching effect.