TLAHUAC YEAR 1999: Construction of the tunnel of 220 cm (86") diameter,using concrete reinforced pipe sunk 183 cm nominal diameter with hidro-mechanic push, with a longitude of 606 mt and light-shaft construction with machiembrado profile, for collector in San José Tláhuac with an execution period from August 09th to December 07th 1999.

sewerage, shields, pipe, tunnels, microtunnels, sheet piling, tube, driving, openings, recondition, drainage, thrust, cofferdams, collector, drilling, excavation