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https://canvas.instructure.com/eportfolios/2091900/knoxaefb326/The_Advantages_Of_Making_Use_Of_Micropiles_To_Repair_A_Structure

Micropiles, likewise known as minipiles, pin stacks, needle stacks, as well as root stacks, are a deep structure element built utilizing high-strength, small-diameter steel case and/or threaded bars. Screw-piles