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[pdf] Core drill rigs, also known as core drilling rigs, are specialized machines used to extract cylindrical samples (cores) from various materials such as rock, soil, concrete, and asphalt.
[pdf] Drilled shafts are high-capacity deep foundation systems, also known as drilled piers, caissons, bored piles, or cast-in-drilled-hole piles (CIDH). Drilled shafts for structural support can be installed by the dry (open hole), stabilizing polymer slurry, or steel-cased methods.
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