Abstract:
This presentation describes the recent advances in design of micropile-to-footing connections. Following extensive testing programs in the US and Portugal, a draft design procedure was developed for connections between micropiles and existing footings. The method considers the cases of micropiles installed through and bonded to reinforced and unreinforced footings, and addresses various connection techniques available to contractors. The draft design procedure also addresses external reinforcement to supplement the connection capacity in cases where the footing is unreinforced or slightly reinforced and the solicitations on the connection are significant.
The presentation will include a brief summary of the investigations performed, and will describe the formulations used for the various cases and examples of application. This investigation and research were performed as part of the DFI Committee Project Fund.Â