Inventory and assessment: Site drainage Historische Stadthalle Wuppertal
Work on the listed town hall in Wuppertal
As part of a planned and extensive renovation of the Historische Stadthalle Wuppertal, IWR GmbH was commissioned by Gebäudemanagement Wuppertal (GMW) to examine the components of the site drainage system of the Historische Stadthalle, which are used to drain rainwater. Both the condition and the hydraulic performance of all components were determined and the flood damage potential of the building was investigated. This work laid a further foundation stone for the further renovation, including the site drainage.
Inspection of the roof drainage system
Built at the end of the 19th century in the Neo-Renaissance style, the town hall has complex roof structures and handcrafted roof drainage components. These were inspected using a cherry picker, which allowed information on the condition and catchment areas of the copper gutters and downpipes to be determined. The data obtained could be used to calculate the hydraulic performance of the roof drainage system in accordance with DIN EN 12056-3 for various precipitation frequencies.
TV inspection in the underground pipe network
During the camera inspections carried out by Börsch GmbH, the previously undocumented, approx. 520-metre-long underground pipe network was recorded, which, in addition to the purpose of assessing the condition, enabled flow paths and catchment areas within the property drainage system to be completed. Based on this, IWR GmbH carried out a condition assessment with subsequent rehabilitation recommendations for all connection and underground pipes in accordance with DIN EN 1986-30 based on the DWA-M 149-2 and DWA-M 149-3 information sheets, as well as hydraulic performance verifications in accordance with the DWA-A 110 worksheet and DIN EN 1986-100 for all underground pipes.
Damage potential and maintenance recommendations
On-site surveys and the use of a digital terrain model (DTM) made it possible to analyze the topographical conditions on the“Historische Stadthalle Wuppertal” property and identify risks with regard to heavy rainfall events. In addition, the relevance of regular maintenance and servicing of all components of the site drainage system to ensure proper functionality was pointed out and specified by the findings of this work. —
WDR report on the overall project at the Historische Stadthalle Wuppertal