ABSTRACT
The Swedish Museum of natural History is today housed in several buildings. Now the museum must expand with 12,000 – 14,000 m2 The only way of maintaining the museum in its present location is an underground expansion project. The bedrock consists of hard rock-granite and gneiss. The store is planned to be constructed as a 200 m long cavern, 18 m wide and 19 m high. The total excavated volume will be approximately 70,000 m3 In the cavern a four-storey concrete structure will house the store. At the top of the building a fifth storey with smaller wide will be added for housing research rooms, conference rooms etc for scientists, students and visitors. The fifth storey is constructed in order to use the gallery in the cavern in the most effective way.
