Flood protection in Saxony
Inauguration of the Döbeln flood channel

On behalf of the German state of Saxony’s dam management authority, the flood protection measures along the Freiberger Mulde river in Döbeln have been expanded and renovated in order to properly protect the surrounding residential and urban areas. The completion of the project was celebrated at the end of October 2021 with an inauguration ceremony. With responsibility for two sections of the project, covering a total length of 650 m, Inros Lackner provided the required planning and design services for a substantial part of the expansion works and of the flood channel’s flooding protection measures. Among other things, the work included the design of a flood protection wall, as an overlapping/secant bored pile wall with facing concrete, connecting to three existing bridges.

The hydraulically required widening of the flood channel by up to 9 m also necessitated the modification of traffic infrastructure, the relocation of service pipes and cables, the redesign of outdoor installations and the stabilisation of a number of buildings. Most significantly, the work included the renovation of the bus station while it remained in service and the replacement of the bridge“Strasse des Friedens”. Due to its geometry, the existing bridge from 1916 would restrict the flow of water in the event of a flood, and thus reduce the flood channel’s effectiveness. The required new structure was designed and built as a prestressed concrete bridge with a total span length of 38 m. 

The nearby control weir is designed to regulate the outflows from the Freiberger Mulde river and the flood channel in the event of a flood, as happened in the summer of 2021. The weir, which was completed in 2016, was opened several times during the construction work - a possibility that had to be taken into account in developing the flood protection proposals.

Source: www.hochwasserschutz-doebeln.de