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Advisor(s)
Abstract(s)
O presente trabalho tem como tema as modelações geológico-geotécnicas tridimensionais, onde
o principal objetivo era avaliar a capacidade destes modelos na limitação de ricos e otimização de
custos em projetos geotécnicos. Começou por se fazer um breve levantamento dos softwares de
modelação 3D, com maior importância no mercado atual, ilustrando-os com três aplicação reais.
O Autodesk Civil 3D foi a ferramenta selecionada para o desenvolvimento da investigação. Em
trabalhos com grandes volumes de dados, a padronização de resultados é um aspeto que revela
grande importância, permitindo harmonizar as interações entre todas as informações disponíveis.
O formato de dados da AGS foi escolhido pela sua versatilidade e suporte pelo software
selecionado. Fruto de uma exaustiva experimentação prática, desenvolveu-se um procedimento
baseado na extensão Geotechnical Modeler. Este inicia-se com o zonamento geológico geotécnico e a criação da base de dados em formato padronizado. Segue-se a criação automática
do modelo 3D, realizando-se os devidos ajustes. A campanha de prospeção geológico-geotécnica
realizada no âmbito da construção do Shopping Cidade do Porto, foi o caso de estudo aplicado.
Um total de 34 furos de sondagem complementados por ensaios SPT foram tratados de acordo
com a metodologia. Quatro zonas geológico-geotécnicas foram propostas. Um primeiro modelo
3D foi gerado, porém, devido à existência de algumas incoerências interpretativas e ao facto do
edifício em projeto ser mais abrangente que o modelo, um segundo foi elaborado. Realizaram-se
algumas correções e extrapolaram-se dados, para que o modelo envolve-se todo o edifício. A
comparação entre os perfis automáticos, conseguidos a partir do modelo gerado, e os perfis
convencionais, expôs que embora os convencionais apresentem maior pormenorização, estes não
têm qualquer influência das sondagens adjacentes. Esta revelou-se a grande vantagem da
metodologia, trabalhando os dados como um conjunto, atingindo assim maiores precisões e,
consequentemente, capaz de minorar os riscos associados, aprimorando a otimização.
This work focuses on three-dimensional geological-geotechnical modelling, where the main objective is to evaluate the capacity of these models to limit risks and optimize costs in geotechnical projects. The study began with a brief survey of today's most critical 3D modelling software, illustrating them with three real applications. Autodesk Civil 3D was the one selected for the investigation. When working with large volumes of data, the standardization of results is crucial, making it possible to harmonize the interactions between all the information available. The AGS data format was chosen for its versatility and support by the selected software. As a result of exhaustive practical experimentation, a procedure was developed based on the Geotechnical Modeler extension. It begins with geological-geotechnical zoning and the creation of the database in a standardized format. It is followed by automatically creating the 3D model and making the necessary adjustments. The case study applied was the geological-geotechnical in situ investigations campaign carried out as part of the construction of Shopping ‘Cidade do Porto’. A total of 34 boreholes complemented by SPT tests were treated according to the methodology. Four geological-geotechnical zones were proposed. A first 3D model was generated, but a second one was produced due to some interpretative inconsistencies and the building under design being more extensive than the model. Some corrections were made, and data was extrapolated so that the model included the entire building. The comparison between the automatic and conventional profiles obtained from the generated model showed that although they are more detailed, they do not influence the adjacent boreholes. This proved to be the most significant advantage of the methodology, working with the data as a whole, thus achieving greater precision and reducing the associated risks, improving optimization.
This work focuses on three-dimensional geological-geotechnical modelling, where the main objective is to evaluate the capacity of these models to limit risks and optimize costs in geotechnical projects. The study began with a brief survey of today's most critical 3D modelling software, illustrating them with three real applications. Autodesk Civil 3D was the one selected for the investigation. When working with large volumes of data, the standardization of results is crucial, making it possible to harmonize the interactions between all the information available. The AGS data format was chosen for its versatility and support by the selected software. As a result of exhaustive practical experimentation, a procedure was developed based on the Geotechnical Modeler extension. It begins with geological-geotechnical zoning and the creation of the database in a standardized format. It is followed by automatically creating the 3D model and making the necessary adjustments. The case study applied was the geological-geotechnical in situ investigations campaign carried out as part of the construction of Shopping ‘Cidade do Porto’. A total of 34 boreholes complemented by SPT tests were treated according to the methodology. Four geological-geotechnical zones were proposed. A first 3D model was generated, but a second one was produced due to some interpretative inconsistencies and the building under design being more extensive than the model. Some corrections were made, and data was extrapolated so that the model included the entire building. The comparison between the automatic and conventional profiles obtained from the generated model showed that although they are more detailed, they do not influence the adjacent boreholes. This proved to be the most significant advantage of the methodology, working with the data as a whole, thus achieving greater precision and reducing the associated risks, improving optimization.
Description
Keywords
Modelação 3D Autodesk Civil 3D Modelação Geológico-Geotécnica Formato AGS Otimização