SCIA User Contest 2017 Online Book

136 Category 4: Special Projects 4 Owner Essverk AB Architect Daniel Forsman General Contractor Flexible Engineering Engineering Office Flexible Engineering Construction Period 02/2016 - 12/2016 The project presents a very complex portal platform for tunnelling work. The upper part of it, the most mobile part, that can sweep across the tunnel roof and walls to lay membrane and reinforcement nets, was analysed using SCIA Engineer. Membrane rolls and reinforcement nets are arriving on trucks, driving/stopping under the platform to be stored on the machine. The upper parts of the machine, analysed in SCIA Engineer, can then fetch rolls/nets and apply them while sweeping along the tunnel roof and walls. The machine can also drive around by itself. When the work is finished, the machine can be folded to a smaller size and driven away on a truck. The portal platform in question was approx. 15 m long (along a tunnel), 3.5 to 7 m wide, depending on if it is folded to small size or not, and intended to reach 7 m height and to the extents over a 12.5 m wide tunnel. The membrane rolls to be applied weigh 1100 kg. 5 people can work on the platform simultaneously, along with 550 kg of equipment. SCIA Engineer was used to quickly test and evaluate hundreds of different cross-sections and different ideas. It was also used to check the important beams according to the Eurocodes. The project was a real challenge, especially as the loads and conditions changed several times during the project and that the number of possible load combinations was very large. Flexible Engineering Contact Daniel Forsman Address Tiskbergsvägen 42B 79153 Falun, Sweden Flexible Engineering is a small consultancy company, working primarily with mechanical simulations and structural calculations. In recent years, the company has successfully analysed very advanced moving mechanisms like tap-changers with finite-element-models, and qualified several machines for use in tunnels and mines using different Eurocodes for cranes, platforms and general equipment. Having access to design and analysing expertise, the company has helped to solve complex problems in a cost-effective way. Portal Platform - Grängesberg, Sweden