| Cutlery two beams in the central part of the second batch of 29 of the A28 viaduct, on the director Vittorio Veneto-Pordenone. Map of the ongoing work Shipyard floodlit for the installation of two beams in the central part of the second batch of 29 of the A28 viaduct, the director Vittorio Veneto-Pordenone. The operation, which took place overnight between Wednesday 25 and Thursday 26 February, closed at Highway, saw two cranes involved 400 tons needed to raise the two beams of reinforced concrete 24 meters long, weighing 70 metric tons 'a, cutlery to complete the second of two viaducts that insist on the node of Conegliano. Each beam has a series of identification codes which set forth the technical characteristics of the materials used and the production methods used, the codes that go to compose the data base covering all the work. The beams were bedded between two "sticks", a sort of huge concrete artifacts mounted on the battery (bases) for the positioning of which have been used cranes from 800 tonnes (in Italy will operate three only). Above the beams in the coming days, will be made of scaffolding (support structures) stabilized with special steel cables that ensure its soundness. Technique, called "post-tension", which allows for wider spans between a pylon and another. Not only has this advanced methodology used in the construction of this highway section, since for most of the artefacts has been used for the first time in a structure so complex, innovative technology. The perfect stability of operations is guaranteed a series of cables of a type of special steel, made in Sweden, which maintain the tension. The yard on the active node of Conegliano, where he realizes the interconnection between A28 and A27, is the most challenging part of Lot 29 since it must ensure, by a wide margin of safety and liquidity, rigging interchange between different directions. The "branches" of the node, run for about half their length on two bridges, the first length of 534 meters and the second 460 meters and the height varies from 7 to 10 meters. Their construction has been particularly complex process in terms of organization. All phases, transport of materials, assembly cranes, from installation to completion, must be organized inserts, also from the perspective of time, just think that the passage of trucks carrying these kinds of artifacts, can pass from Mestre just after 19.00, while the huge cranes used to lift the beams must be booked well in advance because in Italy they operate only three. And again: the closure of the motorway is carried out only in cases of absolute necessity, so that in case of a 29 lot of the poses was made open to traffic. In two years of work, the highway was closed only three times and the same station in Conegliano. WORK IN PROGRESS - continuing, instead, work on the motorway network managed by Autovie Venetian. On the A4 Venice Trieste, in the square of the toll of S. Stino Livenza continuing to work on the construction of an underpass to connect the provincial road 59. Into and exit from the motorway is expected narrowing of the roadway. Also on the A4, between San Stin and Latisana towards Trieste, to allow maintenance of the pavement during the night will close all traffic lanes and emergency. Still on the A4, the section between the barrier and Trieste Lisert Redipuglia, towards Venice, continued assistance for the construction of retaining walls of the cliff. During the day will close all lanes of emergency and travel (excluding public holidays). On the question of Palmanova A23 Tarvisio, finally, between Udine and Palmanova South, in both directions, closing traffic lanes and emergency restoration of the sidebar. |
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