agi – The static testing of the new Genoa bridge has started with 8 trucks. The load tests will reach up to 25 thousand tons. The operations will take up to 54 articulated lorries, in addition to the 4 spmt modules for the tests on the slip ramp with the A7 motorway and can last up to 6 days, according to the technicians’ estimates. The procedures, defined by Anas, Rina and PerGenova, will give the green light to the viability of the new viaduct on the Polcevera.
From the last few hours, the tractor-trailers have been loaded and weighed, which will move in different ways on the bridge to test its settling, torsion and load capacity. The articulated lorries are filled with aggregates: each of the vehicles must weigh from 40 to 50 tons. From the “control room”, the technicians will view the status of the tests and proceed with the interpretation of the data. If the new infrastructure passes all the tests, it will be declared ready.
The load tests began around 8 am and at the moment the so-called “zero phase” is taking place: it foresees a first transit in ‘tight formation’ of the trucks (a weight of about 25 thousand tons) in slow gear to allow settling structural of the deck. Then some vehicles will travel, always in slow gear, the north carriageway and then, following, the south carriageway to test the ‘twisting’ capacity of the deck itself.
Finally, the braking test is foreseen; some vehicles will ‘plant’ the brakes simultaneously at a defined point to test the ability of the bridge to withstand large weights horizontally. There will then be a break to bring other vehicles to the bridge and the first static tests are scheduled in the afternoon. Articulated lorries are used for the bridge, while remote-controlled trolleys (Spmt) are used for the eastern ramp.