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List of products by author: H. C. Rocha
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A simple application of probabilistic concepts as an indicator of tunnel face instability in sequential tunnels by...
Abstract: Many of sequential tunnels constructed in urban areas passes through areas where influence of excavation produces negligible consequences on near buildings or infrastructures. Under these circumstances major attention is given to the ground conditioning through a face stability analysis and too few is given to the settlements that the excavation might produce. The following paper is presented...
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Key Aspects of Tunneling in Tropical Residual Soil
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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Line Green 2 São Paulo Subway - New Stretch - Main aspects of the basic engineering design
Abstract: The new expansion of the Line 2 Green, Stretch between Vila Prudente and Dutra Station, of the São Paulo Subway, will extend this line to the northeast of the city until the neighbour county of Guarulhos, contributing to an expansion in the current system in approximately 14,5 km, with13 new underground stations (7 Conventional method and 6 Cut&Cover), 1 yard for parking and maintenance of...
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OPTV application in the Line 4 Phase 3 design at São Paulo Subway
Abstract: The optical televiewer (OPTV) is a technology introduced since 2001 in Brazil, having its considerations about this method been included only recently in the ABGE Drilling Manual (2013), without, however, presenting detailed specifications of a systematic interpretation of the data. On the other hand there was a lack of suggestions of how these data could be applied for infrastructure site...
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Two tunnel types with low soft overburden under horizontal stress
Abstract: The alignment of Lot 7 of Sao Paulo’s Metro Line 5 tunnel is 5.75 km long and comprises 6 stations. The double track tunnel is constructed by means of an EPB-shield with an excavation diameter of 10.58 m. A detailed description of the project can be found in Along the alignment a turnover-structure originally named Olimpico is located. This structure is built as a cut & cover box with...
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