Drilled shaft resistance based on diameter, torque and crowd (drilling resistance vs. rock strength) phase II [summary].
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2016-05-01
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Abstract:Over the past 20 years, drilled shafts have demonstrated increasing popularity over driven
precast piles. Drilled shafts can accommodate a wider range of sizes, and noise and vibration
during construction are significantly reduced. On the other hand, when installing driven piles, a
large amount of data is collected which gives engineers greater knowledge of the soil and rock
that the pile is being set in. This allows them to adjust designs to create a more secure foundation.
Obtaining this information when using drilled shafts is more complicated and expensive. Because
structure and strength of bearing layers vary so much in Florida, increased knowledge of the
material that will support a drilled shaft, acquired as part of the drilling process, would be very
helpful for designers and construction. In field and laboratory investigations, University
of Florida researchers focused on developing and
evaluating drilling parameter data as a means of
estimating rock strength.
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