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Construction of an approx. 1,400 metre-long surrounding cut-off wall to protect a cut in the B58n from groundwater and flooding. The wall depth varies from 18.65 m to 25.65 m. The construction was carried out as approx. 742 m single-phase and approx. 544 m two-phase diaphragm wall (D = 80 cm) as a cut-off wall. In addition, sheet piling was installed to secure the excavation pit.
