Case study of multi-stage braced excavation in Sofia region

The paper examines a retaining wall used for excavation in Sofia region, Bulgaria. The excavation has an average depth of about 8 m and dimensions in plan 29/32 m. Due to the narrow conditions and the impossibility of placing materials outside the property, the execution of the excavation and the construction of the building was carried out in two stages, which also represents a challenge in the calculation. Different calculation methods are proposed, as well as monitoring results.