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Turnkey construction pits

Research & Innovation Centre building, Munich

Munich, Germany / 05.2021 - 09.2021

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 the front part of the picture is the construction site made of sand and gravel with a yellow construction machine. On the left-hand side is the wall of the neighbouring building. Next to it you can see a grey silo. At the back of the construction site is another piece of construction equipment. There is a white office building on the horizon. A red tipper lorry is driving across the construction site.

Facts & Figures

Company

PORR Spezialtiefbau GmbH

Type

Turnkey construction pits

Runtime

05.2021 - 09.2021

Principal
BMW Group

Lean and green: a sustainable construction pit enclosure in Munich

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.

What ultimately counts in the construction business is successfully completed projects. PORR has many of these.

In the front part of the picture is the construction site made of sand and gravel with a yellow construction machine. On the left-hand side is the wall of the neighbouring building. Next to it you can see a grey silo. At the back of the construction site is another piece of construction equipment. There is a white office building on the horizon. A red tipper lorry is driving across the construction site. View of the finished and rigid construction pit walls with a depth of approx. 2 metres. At the right-hand edge of the picture, a construction machine is creating the back anchoring. The ground consists of gravel, sand and coarse stone with small puddles. At the edge of the excavation pit is a silo as well as a construction container