<p>This study aims at researching damage mechanism of tunnel portal and front slope caused by seismic excitation, while post-earthquake field investigations and shaking table tests were conducted. Seismic damage mechanism can be drawn from comparison between ...

In this paper, engineering geological properties of the entrance portal section of Konak&ouml;n&uuml; Tunnel, located on Black Sea Coastal Highway, Turkey, is studied. Moderately weathered basaltic and andesitic tuffs orderly to be driven by the entrance ...

In this study, applicability of the excavatability classification systems in underground excavations is investigated. For this purpose, the entrance portal of the Konak&ouml;n&uuml; (Araklı-Trabzon) tunnel, excavated in volcanic rocks within the scope of Black ...

<p>This paper describes the design methods and the construction techniques applied at two (2) tunnel sites in Greece, where the highway alignment runs almost parallel to very high and extremely steep mountainous cliffs and slopes in a seaside area. The project ...