Translartion. Region: Russians Fedetion –
Source: Moscow Government – Government of Moscow –
The second stage of the major repairs of the Krasnopresnensky overpass has begun. About 100 workers and specialists are employed at the site. Excavators, loaders, manipulators, rollers, asphalt pavers, a beam dismantling unit, compressors and generators are involved in the work.
There are currently four lanes for cars: two each in the direction of Begovaya Street and 1905 Street. A temporary dividing barrier with red signal lights has been installed between the oncoming directions. Fences, information boards and temporary road signs have also been erected in the work area. Pedestrians can use the sidewalk located outside the work boundaries. The speed limit on the overpass is 40 kilometers per hour.
“The dismantling of the bridge deck has now been completed. Specialists have begun dismantling the beams of the superstructure. A total of 90 beams will be dismantled. Each weighs over 50 tons, and is 24.3 to 33.7 meters long. The work is being carried out at night and during the day, depending on the process windows, in agreement with the railway workers. At present, 14 beams have already been dismantled, located on the side of 1905 Goda Street and above the railway tracks,” said the deputy head of the capital’s Department of Capital Repairs.
To determine which technology to use for the safe dismantling of each beam, specialists conduct laboratory testing of its condition. For this purpose, special openings are made to provide access. If the defects are significant, the beam will be sawn into pieces and dismantled. In this case, supporting underbridge elements can also be used. If the beam is strong, it can be dismantled entirely.
To dismantle the beams of the superstructure, an assembly unit is used. This is a specially designed lifting crane that moves along the rails laid on the overpass. After the beams are disconnected using a diamond cutting machine, the unit lifts them with special grips and takes them to the storage site. The dismantled beams are crushed and disposed of at special landfills.
Anton Akulov added that 60 beams out of 90 will be dismantled using an assembly unit. Then the rails will be dismantled, and the remaining beams will be dismantled using truck cranes. After the repair of the bridge structure supports is completed, they will begin installing new beams that meet modern requirements for strength and load resistance. They will be protected from corrosion using special means. Then they will install expansion joints and begin forming the bridge deck. The beams will be covered with monolithic slabs, leveling layers will be applied, and then waterproofing and asphalt will be performed.
At the final stage, the builders will install a curb and equip sidewalks, along which they will install lighting poles and put the railings in order. In addition, it is planned to repair the staircases and the granite cladding of the overpass. Specialists will also reconstruct the exit onto Bryansky Post Street.
Tests were successfully conducted on the Krasnopresnensky overpassMajor repairs of Krasnopresnensky overpass are already half complete
Krasnopresnensky overpass runs over the railway tracks of the Smolensk direction of the Moscow Railway and connects 1905 Goda and Begovaya streets with Khoroshevskoye Highway. It is part of an important city road. It was decided to carry out major repairs in stages, without closing the bridge completely. The first stage was completed in January of this year.
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