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List of products by author: F. M. Kuwajima
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Geological and Geotechnical Aspects of Line 4S RJ - Stretch Morro do Cantagalo-Gávea
Abstract: The present paper introduces the main geological and geotechnical aspects of Line 4: Stretch South from Rio de Janeiro Metro system. Crossing several geological scenarios, from very good rock to soils formed in transitional environment, the stretch will be excavated with Tunneling Boring Machine (TBM) with a diameter greater than 10 meters. Having as main reference more than 250 boreholes, the...
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Rio de Janeiro Metro – Vibrations due to blasting in urban environment
Abstract: Rio de Janeiro Metro Line 1 is being connected to Line 4 and the excavations include several tunnels of different sizes, all of them excavated using drill and blast methodology. The vibrations due to blasting are continuously monitored, to control and, if necessary, adjust the blasting activities to levels compatible with the urban environment of Copacabana. The paper presents blasting data and...
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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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Settlements due to the Excavation of Shafts in São Paulo
Abstract: This work presents a study of the settlements registered during the excavation phase in several shotcrete supported shafts built by the São Paulo Metropolitan Company - Metrô (CMSP). Using data present in SACI: monitoring system and iterative control of instrumentation of the CMSP software, a statistical analysis and a methodology to estimate settlements are presented. The shafts under study...
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