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List of products by author: D. Soares Júnior

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    Abstract: A 139 m² tunnel excavation is analyzed, part of the Line 5 Extension of Companhia do Metropolitano de São Paulo (CMSP), excavated in gneiss residual soil, confronting instrumentation data with results from bidimensional analysis utilizing a numerical model with finite elements. The tunnel excavation was divided into three stages and the tunnel construction complete sequence is reproduced,...

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    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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    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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    Abstract: Tropical residual soils present a real challenge regarding conventional tunneling. These soils are heterogeneous, with ever-changing face conditions, non horizontal stratification and a high sensibility to water content and transient conditions. At each excavation step the face conditions change, demanding a careful approach in terms of ground treatments and dewatering systems. The...

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Showing 1 - 4 of 4 documents