Abstract
Miocene volcanic rocks are widely exposed in the eastern Taurids, Turkey. The geomechanical properties and weathering degree of the Middle–Upper Miocene basalts were determined at the Boztepe dam site in Malatya, eastern Turkey. An engineering geology map of the Boztepe dam site was made and the joint sets and the degree of weathering determined in the field. The degree of weathering and RQD values were obtained on some 1,195 m of core which was then compared with a series of geomechanical tests including unit weight, porosity, water absorption, uniaxial compressive strength and compressive wave velocity. The geomechanical properties were compared with the weathering classifications of ISRM (Rock characterization, testing and monitoring, p 211, 1981) and Kilic (Environ Eng Geosci 4:475–483, 1999)
Résumé
Les roches volcaniques miocènes affleurent largement dans l’est des chaînes du Taurus en Turquie. On s’est intéressé aux propriétés géomécaniques et au degré d’altération des basaltes du Miocène moyen et supérieur sur le site du barrage de Botzepe à Malatya, dans l’est de la Turquie. Une carte de géologie de l’ingénieur du site du barrage a été réalisée, les familles de discontinuités et les degrés d’altération étant étudiés sur le terrain. Le degré d’altération et les valeurs de RQD ont été obtenus à partir de 1195 m de carottes qui ont alors été comparés à une série de résultats d’essais géomécaniques : densité, porosité, absorption d’eau, résistance à la compression simple et vitesse des ondes de compression. Les propriétés géomécaniques ont été mises en rapport avec les classes d’altération de l’ISRM (1981) et de Kilic (1999).
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Gurocak, Z., Kilic, R. Effect of weathering on the geomechanical properties of the Miocene basalts in Malatya, Eastern Turkey. Bull Eng Geol Environ 64, 373–381 (2005). https://doi.org/10.1007/s10064-005-0005-2
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DOI: https://doi.org/10.1007/s10064-005-0005-2