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<br />Foundations <br />Foundation elements such as driven piles, augercast piles, and drilled shafts will be compared in <br />the BDR. One of the key considerations for the choice of foundation element is the <br />minimization of construction-related vibrations. The project site is within 200 feet of the <br />Chateau Beach Residences, Double Tree Resort, and the Winston Tower Condominiums - all of <br />which are high value properties. <br />FDOT Standard Specifications 108 requires “qualified Specialty Engineer to continuously monitor <br />and record vibration levels. Upon either detecting vibration levels reaching 0.5 inches per second <br />or damage to the structure the source of vibrations is to be stopped immediately.” Based on this <br />construction risk and our preliminary calculations, we propose to use 24-inch augercast piles <br />as the bridge foundation system. <br />Benefits of Augercast Pile foundations include: <br />• Induce virtually no vibration or noise during installation <br />• Proven track record supporting the tallest buildings in the <br />City of Sunny Isles Beach <br />• Provide soil improvement by injecting grout to cemented <br />sand and weak limestone resulting in high shear values <br />• More economical foundation system with quicker <br />installation relative to driven piles or drilled shaft foundation <br />systems <br />• Provide a higher capacity in a single unit when compared to <br />driven pile or drilled shaft of same diameter <br />• Provide the same uplift resistance as compressive resistance <br />• Allow Automated Monitoring Equipment (AME) to be used <br />during installation to control quality of foundation element <br />• Require smaller pile cap due to fewer piles <br /> Augercast Pile Installation <br />D-18