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Abstract: Uskudar-Umraniye–Cekmekoy-Sancaktepe metro line of 20 km having two tubes is recently commissioned to Doğuş Construction Company by Istanbul Metropolitan Municipality authorities. The geology is complex consisting of sandstone, arcosic sandstone mudstone, siltstone, shale, limestone, andesite, and quartzitic conglomerate. The geologic units are frequently cut by...