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List of products by author: F. L. Gonçalves
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Challenges in a great diameter tunnel excavation in sandy soil
Abstract: An 84 m long conventional tunnel with 117 m² tunnel cross section is under constructed in layered soil, which ranges from sandy soil with high permeability to clayey soil with low permeability. High groundwater pressures in the excavation of the crown and invert have been experienced. The tunnel concept had a pre-support in Jet Grouting executed from surface. This solution allowed a faster...
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Development of a new design for Metro Stations
Abstract: The concept for Brooklin Station consists of five circular intersecting shafts, with a diameter of 35m, 30m in depth, and a total excavation surface of 4250 m². Water control and management is fundamental as the entire Brooklin Station area is near a contaminated zone, making any dewatering process impossible to execute. Since the water level is near the surface, structural demand is also very...
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Segmental concrete tunnel lining design for two 6.9 m EPB TBM machines
Abstract: Precast segmental linings for shield driven tunnels are designed as both initial ground support and final tunnel lining in modern projects. The parameters of tunnel lining such as dimensions, thickness and strength of materials are related not only to ground-lining interaction, but also to construction conditions. In current case, both conventional steel cage and steel fiber reinforcement were...
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Twin tunnels excavated in sandy soils in a density urban area
Abstract: The Line 5 Extension is being the major government investment for the public transport in São Paulo/ Brazil. It will connect the São Paulo south area to its central area, with a whole extension of 11 kilometres, including 11 new stations. The first stretch consists of two single tunnels with 4 kilometres long each, which will be executed by two 6,86 m EPB Shields. The two machines will bore...
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