prefabricated reinforced concrete element for the construction of olympic is vibrated or universal for firing flight

摘要

the invention relates to an element for the construction of the olympic or was universal for firing flightconsisting of a single body (10) assemblabile prefabricated reinforced concrete vibrated with a plurality of other elements the same aligned to form the hole the length desired.at least a part of the plurality of elements aligned with extreme applied a ladder access to the pit.the opposite ends of the plurality of elements aligned with the walls of the closure reported head (20, 21).fig. 2