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12 results on '"Luís Ribeiro e Sousa"'

1. Acidentes e danos associados a obras subterrâneas

Author

Luís Ribeiro e Sousa

Subjects
Obras subterrâneas, Acidentes, Incidentes, Danos, Geology, QE1-996.5, Engineering geology. Rock mechanics. Soil mechanics. Underground construction, TA703-712
Abstract

Apesar da ocorrência de acidentes ou incidentes em obras subterrâneas não ser tão pouco frequente como em outras estruturas geotécnicas, a disseminação destes eventos não e comum dados os problemas legais envolvidos. Em geral, existe a tendência para minimizar a divulgação dos danos envolvidos e das causas que os originaram. Neste artigo, e feita uma revisão dos aspectos de segurança em estruturas subterrâneas, nomeadamente dos diferentes tipos de acidentes e as suas consequências. As causas principais de acidentes e outras deteriorações são descritas e classificadas. São apresentados casos de acidentes e incidentes ocorridos em projectos hidrelétricos subterrâneos, em tuneis de redes de transporte e de metropolitanos em meio urbano. Mencionam-se, ainda, aspectos relacionados com a interacção dos túneis urbanos com as infraestruturas existentes a superfície e no interior do próprio maciço e dos danos associados.

Published
2004
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6. Soft Rock Mechanics and Engineering

Author

Milton Kanji, Manchao He, Luís Ribeiro e Sousa, Milton Kanji, Manchao He, and Luís Ribeiro e Sousa

Subjects
Rock mechanics, Mining engineering, Civil engineering
Abstract

This book offers a practical reference guide to soft rock mechanics for engineers and scientists. Written by recognized experts, it will benefit professionals, contractors, academics, researchers and students working on rock engineering projects in the fields of civil engineering, mining and construction engineering. Soft Rock Mechanics and Engineering covers a specific subject of great relevance in Rock Mechanics – and one that is directly connected to the design of geotechnical structures under difficult ground conditions. The book addresses practical issues related to the geomechanical properties of these types of rock masses and their characterization, while also discussing advances regarding in situ investigation, safety, and monitoring of geotechnical structures in soft rocks. Lastly, it presents important case histories involving tunnelling, dam foundations, coal and open pit mines and landslides.

Published
2020

7. Innovative Numerical Modelling in Geomechanics

Author

Luis Ribeiro e Sousa, Eurípedes Vargas Jr, M.M. Fernandes, Roberto Azevedo, Luis Ribeiro e Sousa, Eurípedes Vargas Jr, M.M. Fernandes, and Roberto Azevedo

Subjects
TA710
Abstract

Since the 1990s five books onApplications of Computational Mechanics in Geotechnical Engineering have been published. Innovative Numerical Modelling in Geomechanics is the 6th and final book in this series, and contains papers written by leading experts on computational mechanics. The book treats highly relevant topics in the field of geotechnic

Published
2012

8. CO2 Storage in Carboniferous Formations and Abandoned Coal Mines

Author

Manchao He, Luis Ribeiro e Sousa, Derek Elsworth, Euripedes Vargas Jr, Manchao He, Luis Ribeiro e Sousa, Derek Elsworth, and Euripedes Vargas Jr

Subjects
TD885.5.C3
Abstract

Underground geological storage of carbon dioxide (CO2) has considerable potential for mitigating climate change. CO2 can be safely injected and stored at well characterized and properly managed sites. Injecting carbon dioxide in deep geological formations can store it underground for long periods of time. Depleted oil and gas reservoirs, saline aqu

Published
2012

9. The Second Half Century of Rock Mechanics, Three Volume Set : 11th Congress of the International Society for Rock Mechanics, 3 VOLUMES + CD-ROM

Author

Luis Ribeiro e Sousa, Claudio Olalla, N. Grossmann, Luis Ribeiro e Sousa, Claudio Olalla, and N. Grossmann

Subjects
TA706
Abstract

Forty one years ago, the International Society for Rock Mechanics (ISRM) held its 1st International Congress in Lisbon, Portugal. In July 2007, the 11th ISRM Congress returned to Lisbon, where the Portuguese Geotechnical Society (SPG), the Portuguese National Group of the ISRM, hosted the meeting. The Second Half Century of Rock Mechanics comprises

Published
2007

10. Geotechnical Risk in Rock Tunnels : Selected Papers From a Course on Geotechnical Risk in Rock Tunnels, Aveiro, Portugal, 16-17 April 2004

Author

Antönio Campos e Matos, Luís Ribeiro e Sousa, Johannes Kleberger, Paulo Lopes Pinto, Antönio Campos e Matos, Luís Ribeiro e Sousa, Johannes Kleberger, and Paulo Lopes Pinto

Subjects
TA815
Abstract

Tunnels have a high degree of risk that needs to be assessed and managed. Underground works intersect and interact with natural materials, incorporating their characteristics as structural components of their own stability. For this reason geotechnical risk analyses are implemented at all phases of tunnel construction, from design through to post-c

Published
2006

11. The Use of Data Mining Techniques in Rockburst Risk Assessment

Author

Luis Ribeiro e Sousa, Tiago Miranda, Rita Leal e Sousa, and Joaquim Tinoco

Subjects
Rockburst, Data mining, Bayesian networks, In situ database, Engineering (General). Civil engineering (General), TA1-2040
Abstract

Rockburst is an important phenomenon that has affected many deep underground mines around the world. An understanding of this phenomenon is relevant to the management of such events, which can lead to saving both costs and lives. Laboratory experiments are one way to obtain a deeper and better understanding of the mechanisms of rockburst. In a previous study by these authors, a database of rockburst laboratory tests was created; in addition, with the use of data mining (DM) techniques, models to predict rockburst maximum stress and rockburst risk indexes were developed. In this paper, we focus on the analysis of a database of in situ cases of rockburst in order to build influence diagrams, list the factors that interact in the occurrence of rockburst, and understand the relationships between these factors. The in situ rockburst database was further analyzed using different DM techniques ranging from artificial neural networks (ANNs) to naive Bayesian classifiers. The aim was to predict the type of rockburst—that is, the rockburst level—based on geologic and construction characteristics of the mine or tunnel. Conclusions are drawn at the end of the paper.

Published
2017
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