Heavy transport – For the expansion of the road capacity of highway A6 (running North-South through Flevoland) the junction with highway A1 needed to be rearranged. For this expansion and a smooth connection of the new A6 the nearby concrete railway bridges needed to be replaced by a new steel bridge with a record breaking span of 255 m. To minimize obstruction and road closures, the new bridge was assembled next to the highway, transported over the highway by SPMT’s and later shifted into position.
Crossing a highway with a load of more than 8500 t without any damage to the road and the bridge itself is not as easy as “crossing the street”. Especially below the surface of the highway, partly consisting out of peat, was reason for concerns.
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The offered solution was to transport the assembled steel bridge over the highway to a temporary location along the existing rail way bridge. Next step was to complete the bridge assembly with a concrete deck, demolish the existing railway bridges and skid the new bridge into the final location.
For crossing the highway a reinforced SPMT track was made, compacted and partly excavated. This in combination with almost 500 lines of SPMT and an extensive monitoring system on the bridge itself and also real time water pressure meters deeper underground. During the second phase, skidding the bridge into final position, the bridge weight was grown up to a massive 15700 t.
Heavy transport specialist
Eager.one participated in the reviewing committee, checking the prepared plans and project schedule.
The bridge was transported and skidded within the planned time window without any setbacks!
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