This study investigates practical splicing methods for ultra-high-performance concrete (UHPC) piles through both analytical and experimental evaluation. Analytical results identified epoxy-bonded dowel splices as a promising option for UHPC pile connections, with the potential to develop more than the pile’s bending capacity. Experimental evaluation consisted of twenty-two pullout tests on No. 8 and No.10 reinforcing bars embedded in UHPC, with embedment length, cast or drilled hole, and epoxy type as the primary variables. Results showed that a 30 inches (76.2 cm) embedment length is appropriate for cast holes representing preplanned field conditions, while 24-30 inches (61-76.2 cm) is suitable for drilled holes representing unplanned conditions. The better performing epoxy was identified for subsequent testing; the failure mode was governed by either bar yielding or loss of bond at the epoxy bar interface. These findings support the feasibility of epoxy-bonded UHPC pile splices, although full-scale testing is still needed to confirm structural behavior and constructability.
