No document
Search & filter
Search for a publication
Search & filter
List of products by author: D. G. G. de Oliveira
-
EPB Conditioning of Mixed Transitional Ground: Investigating Preliminary Aspects
Abstract: Challenging conditions are often encountered while excavating mixed transitional ground with Earth Pressure Balance Machines. Soil conditioning plays a key role in understanding and potentially overcoming several of the common issues. This paper summarizes the main aspects of this scenario, and investigates some particularities of the soil that might be vital to the excavation and operation of...
0,00 € -
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...
0,00 € -
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...
0,00 € -
Proposed Methodology for Clogging Evaluation in EPB Machines
Abstract: Clogging occurrence has long been an issue for EPB drives, through not only pure clay soils, but also in mixed soils with sufficient clay content for clogging to happen. It occurs when clay particles adhere to metal surfaces of excavation tools because of the attractive forces of the clay particles and the presence of water between the clay-metal surface. The occurrence of clogging in Earth...
0,00 €
