Research & Innovation Centre building, Munich

During May to September 2021, PORR built the construction pit for the new building of the Research and Innovation Centre (Forschungs- & Innovationszentrum, FIZ) in the north of Munich. What makes the specialist civil engineering work of the PORR subsidiary so special is that it is a prime example of how construction pits can be produced both ecologically and economically. Our colleagues from PORR Spezialtiefbau Planung provided support for the structural engineering, which was carried out with lean construction management tools.

A first-class ecological and economical solution: shoring the construction pit with a soil mixing wall

The construction pit enclosure essentially consisted of 3,100m² of soil mixing wall with steel profiles and anchors. The environmentally friendly and low-vibration soil mixing process involves adding cement slurry to the existing soil in situ, and mixing them together. The reinforcement elements are inserted into the fresh soil and concrete body, which is up to 13.4m deep.

In addition, 630m² of secant anchored bored pile wall and 200m² of contiguous pile wall with jetcrete infill were constructed in those areas where this was structurally necessary. A total of 1,200m of temporary grouted anchors secured the construction pit and a closed dewatering system prevented groundwater from seeping in.

Lean construction management ensured optimised processes

The highly efficient lean construction project management tool is appreciated by all departments. The trades involved in producing the construction pit for the building on the grounds of the FIZ and the client benefited from a transparent overview of the processes. The individual work steps for each day were scheduled at the joint weekly meetings. Everyone knew which activities were planned for what times, and when which trade had to be present on the construction site. This facilitated a timely handover of the construction pit.