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Zagreb, Croatia

Hrestak T.,Viadukt d.d. | Lazarevic A.J.,University of Zagreb | Frgic L.,Pierottijeva 6
Tehnicki Vjesnik | Year: 2015

The distribution of stresses and strains during the portal section excavation for the right tube of the Sleme Tunnel is analysed by the Finite Element Method (FEM). Results of analyses obtained using 2D and 3D models have been compared to in-situ measurements of tunnel convergence and ground surface settlements. Multistage excavations with pipe roof support of the working face were modelled. The numerical models verified that for this particular case a sufficiently safe and cost-efficient construction technology was applied. © 2015, Strojarski Facultet. All rights reserved. Source

Kolenkovic I.,Pierottijeva 6 | Saftic B.,Pierottijeva 6
Rudarsko Geolosko Naftni Zbornik | Year: 2014

Carbon dioxide geological storage represents a key segment of the carbon capture and storage system (CCS) expected to significantly contribute to the reduction of its emissions, primarily in the developed countries and in those that are currently being industrialised. This approach to make use of the subsurface is entirely new meaning that several aspects are still in research phase. The paper gives a summary of the most important recent results with a short overview the possibilities in the Republic of Croatia. One option is to construct underground carbon dioxide storage facilities in deep coal seams or salt caverns. Another would be to use the C02 in enhanced oil and gas recovery projects relying on the retention of the carbon dioxide in the deep reservoir because a portion of the injected gas is not going be produced together with hydrocarbons. Finally, the greatest potential estimated lies in depleted hydrocarbon reservoirs with significantly reduced reservoir pressure, as well as in the large regional units - layers of deep saline aquifers that extend through almost all sedimentary basins. © 2014, University of Zagreb. All rights reserved. Source

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