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Egeli I.,Tehnoloski Institute u Izmiru | Kartaltepe N.,Tehnoloski Institute u Izmiru
Gradjevinar | Year: 2012

Possibilities for building the Izmir Bay Immersed Tube Tunnel are analyzed in the paper. Study results show that the tunnel construction is feasible if a particular soil improvement is conducted properly. A minimum SPT-N value, compatible with concrete to be used in construction of the immersed tube, is defined so as to enable subsequent improvement of soil density. This procedure enables achievement of the minimum post-improvement soil-structure interaction stiffness level, as well as fulfilment of all other geotechnical criteria This was demonstrated using the existing data about sub-sea soil in which the tunnel construction is planned.


Tayfur G.,Tehnoloski Institute u Izmiru | Egeli I.,Tehnoloski Institute u Izmiru
Gradjevinar | Year: 2013

The main requirement in the design of high-speed railway embankments are low values of total differential settlements. The use of cement stabilized layers in embankments, as compared to non-stabilized layers that are now most often in use, is analysed in the paper. Different cement proportions and different water/cement ratios for stabilized layers are considered. It was established that the use of cement stabilized layers in embankments can greatly reduce thickness of individual layers, while also reducing settlement. The research was conducted using the feed forward neural network.

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