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Application of a sensitivity analysis procedure to interpret uniaxial compressi...

Jet Grouting (JG) technology, one of the most efficient soft soils improvement methods, has been widely applied in important geotechnical works due to its versatility. However, there is still an important limitation to overcome related with the absence of rational approaches for its design. In the present work, three different Data Mining (DM) techniques, i.e., Artificial Neuronal Networks (ANN), Support Vector...

Previsão do comportamento mecânico de formulações laboratoriais de solo-cimento...

Atualmente, no âmbito dos métodos de tratamentos de solos, o jet grouting (JG) é uma das tecnologias mais utilizadas, nomeadamente em importantes obras geotécnicas, caracterizando-se pela sua grande versatilidade. No entanto, no que respeita à previsão das propriedades mecânicas do novo material resultante do tratamento, a heterogeneidade dos solos e o elevado número de parâmetros envolvidos são os fatores que ...

Utilização de máquina de vetores de suporte na previsão do comportamento mecâni...

Seminário aspectos geotécnicos do projecto, construção, exploração e análise de...

O Seminário apresenta duas componentes principais. Por um lado, dá a conhecer um importante conjunto de obras subterrâneas, que estão presentemente em curso ou em fase de projecto, quer associadas aos grandes empreendimentos hidroeléctricos, quer associadas às redes de transportes ferroviários e rodoviários. Trata-se de obras de grandes dimensões e complexidade, como sejam os reforços de potência de vários empr...

Application of data mining techniques in the estimation of the uniaxial compres...

Jet grouting (JG) is a soil treatment technique which is the best solution for several soil improvement problems. However, JG lacks design rules and quality controls. As a result, the main JG works are planned from empirical rules that are too conservative. The development of rational models to simulate the effects of the different parameters involved in the JG process is of primary importance in order to satis...

Support vector machines in mechanical properties prediction of jet grouting col...

Strength and stiffness are the mechanical properties currently used in geotechnical works design, namely in jet grouting (JG) treatments. However, when working with this soil improvement technology, due to its inherent geological complexity and high number of variables involved, such design is a hard, perhaps very hard task. To help in such task, support vector machine (SVM), which is a data mining algorithm es...

The cyclic triaxial test as tool to quantify coarse non-conventional materials ...

Sustainable waste management requires efficient dealing to protect landfill and reduce waste deposits. For that it becomes necessary to improve material characterization, using performance based tests, to estimate waste reuse as construction material. Several mechanical tests exist which make possible to use numerical tools to estimate reversible and irreversible behaviour of non-conventional coarse material, a...

Valuable information from reliability analysis of pile foundation

The work presented in this paper was developed under the PhD thesis entitled “Reliability and Cost Models of Pile Foundations”. Our main goal is to present guidelines for geotechnical engineers to carry out reliability based designs (RBD). This analyses help evaluate the probability of a particular behavior in a time period, with the knowledge of the input parameters randomness (uncertainties). The biggest bene...

Uniaxial compressive strength prediction of jet grouting columns using support ...

Uniaxial compressive strength (UCS) is the mechanical properties currently used in geotechnical works design, namely in jet grouting (JG) treatments. However, when working with this soil improvement technology, due to its inherent geological complexity and high number of variables involved, such design is a hard, perhaps very hard task. To help in such task, a support vector machine (SVM), which is a data minin...

Application of data mining techniques in the estimation of mechanical propertie...

Sometimes, the soil foundation is inadequate for constructions purpose (soft-soils). In these cases there is need to improve its mechanical and physical properties. For this purpose, there are several geotechnical techniques where Jet Grouting (JG) is highlighted. In many geotechnical structures, advance design in- corporates the ultimate limit state (ULS) and the serviceability limit state (SLS) design criteri...