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9/2022. Featuring presentations of master's theses from the Master's Programme in Geoengineering
Entrance to the rock engineering laboratory.
Picture: Unto Rautio

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Programme 23.9.2022

The length of each presentation is 15 minutes, with an additional 5 minutes reserved for discussion.

  • 14:00-14:20 : Taavi-Waltteri Valjakka Environmental effects of column stabilization on surface- and  groundwater       

  • 14:20-14:40: Angela Quintero Martinez  Assessment of the values of dynamic factors based on data from the Kokemäki-Pori railway section

Prof. Wojciech Solowski, Director of the Master's Programme in Geoengineering

 

Wojciech Solowski

Wojciech Solowski

Associate Professor
T214 Civil Engineering
Leena Korkiala-Tanttu

Leena Korkiala-Tanttu

Professori (Associate professor)
T214 Civil Engineering

Theses presented

Environmental effects of column stabilization on surface- and groundwater

Author: Taavi-Waltteri Valjakka
Supervisor: Professor Leena Korkiala-Tanttu
Advisors: DI Juha Forsman & TkT Inka Reijonen
Funding:

Abstract:

Assessment of the values of dynamic factors based on data from the Kokemäki-Pori railway section

Author: Angela Quintero Martinez
Supervisor: Professor Wojciech Sołowski
Advisors: Mauri Kulman, Lic. Sc. (Tech.)
Funding: Väylävirasto

Abstract:

Traditionally, pseudo-static analyses have been used to evaluate the influence of dynamic forces on structures. In this approximation, a static force is amplified by a dynamic factor. Then it is assumed that the effects on the structure due to a pseudo-static load are equivalent to the real effect of a dynamic force. However, pseudo-static approximation may constitute an oversimplification of dynamic problems and result in overdesigning. With the new developments in the numerical methods field, we could more accurately analyse the impact of dynamic loadings using advanced computational tools such as FEM models. In this work, using FEM models, a comparison between pseudo-static and dynamic analysis was done to evaluate the influence of railway traffic on nearby structures.

A total of 40 simulations were run corresponding to 10 modelling cases (6 pseudo-static, 4 dynamic) and 4 cross-sections (without structures, with slabs under railway line and retaining walls).

The results showed that the pseudo-static approach might be appropriate to assess the influence of railway traffic on nearby structures, with some limitations regarding the estimation of displacements. In other words, it may not be necessary to do a dynamic model to evaluate the effects of traffic loadings on structures.

Geoengineering master's theses
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