OasisLMS

Abstract: The last ten years have seen a rapid increase in the number of public agencies applying mass concrete provisions to drilled shafts, with roughly half of state departments of transportation now considering large-diameter shafts as mass concrete. The provisions that are applied vary widely among agencies and from project to project. This paper draws from recent experience developing thermal control plans for at least eight different drilled shaft projects to document the range of practices with respect to maximum internal temperature, maximum temperature differential, monitoring requirements, and other important provisions. The paper then presents recommended practices for each of the same provisions. The recommended practices are intended to satisfy the legitimate demand for durable drilled shafts while accounting for the unique environment of underground concrete and the practical realities of drilled shaft construction.

Dr. Andrew Boeckmann; Mr. Paul Jason Axtell

Annual Conference Proceedings