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Faculty of Mining, Geology and Civil Engineering , University of Tuzla , Tuzla , Bosnia and Herzegovina
Motorways of FBiH, Public Company , Mostar , Bosnia and Herzegovina
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Faculty of Mining, Geology and Civil Engineering , University of Tuzla , Tuzla , Bosnia and Herzegovina
Faculty of Mining, Geology and Civil Engineering , University of Tuzla , Tuzla , Bosnia and Herzegovina
The seismic refraction method belongs to the group of non-destructive testing techniques and represents an efficient geophysical approach for determining the propagation velocity of seismic waves through different geological environments. This allows for the assessment of key geomechanical parameters of the terrain. In this study, measurements were conducted along three profiles in the excavation zone of the Vranduk tunnel, located on the Corridor Vc route, with the aim of characterizing the rock mass and determining its condition before the commencement of construction work. Analysis of the obtained data defined the velocities of seismic waves, which were used to assess rock mass quality, classify materials, and identify potential discontinuities and weakened zones. The results indicated that in the upper zone, at a depth of 6–8 meters, the rock mass is weathered, whereas in deeper layers, the rock mass is more intact and only slightly fragmented. Since this method is entirely non-destructive, it enables rapid and reliable terrain investigation without disturbing its structure. The results were compared with in-situ geotechnical investigations, confirming the method’s reliability in determining the mechanical properties of rocks. The obtained data served as a foundation for optimizing design solutions, adjusting excavation techniques, and improving the stability of the tunnel structure.
seismic refraction, geomechanical parameters, Vranduk tunnel, Corridor Vc route, longitudinal wave velocity
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