The construction of a new 2.2 kilometre district heating pipeline in Sempach connected two heating centres. The aim was to ensure a reliable supply with an output of up to 4.5 MW.
The construction work was carried out under the management of the Sempach Corporation in collaboration with GUNEP AG (planning), SSP Fernwärme GmbH (pipeline construction) and BRUGG Pipes (pipe supplier). The route supplies the Felsenegg substation (3.5 MW) and other consumers (1 MW), among others.
The route was characterised by complex geological and infrastructural conditions. A central element was the undercrossing of the SBB railway tracks and the Grosse Aa stream using a flush drilling method within a radius of 170 metres - without affecting rail traffic or the watercourse. Another key measure was the crossing of the Kleine Aa, where a customised culvert was installed.
The installation work was carried out with minimal disruption to Luzernerstrasse traffic. The drilling through rock to the Felsenegg school centre proved to be particularly challenging. In addition, the construction in groundwater-bearing layers required special seals, which were realised using our patented INDUCON induction welding process.
Despite the challenging conditions, the project was completed within the planned time frame and ensures a stable, efficient and environmentally friendly heat supply for Sempach in the long term.