Abstract

The prototype of a friction pile-box foundation, one of the supports of an urban bridge, was instrumented in order to learn more about the performance of this usual type of foundation in the difficult soft clayey soils of Mexico City. Load-transfer mechanisms that develop at pile-soil and slab-soil interfaces during construction stage and the beginning of bridge operation are discussed in this paper, taking into account the measured applied loads on friction piles, pressure distribution at the raft-soil interface, piezometric heads in the subsoil water, and the foundation movements.

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