Аңдатпа
The article proposes a new type of transport equipment that is a mobile overpass. The proposed design is used during underground repairs of urban utility networks and is a prefabricated modular bridge structure equipped with its own chassis. The overpass structure is installed through open repair trenches on highways, which will ensure continuous traffic through repair sections. The overpass is equipped with its own chassis and is mobile. The use of the overpass improves the city transport logistics during repair work: eliminates traffic jams due to the lack of need to detour repair sections, reduces the accident rate, distributes traffic flows, improves the environment, etc. It can also be used during emergency situations where it is necessary to overcome various landslides, ditches, trenches, etc. After the end of operation, the overpass structure is dismantled and can be used multiple times. The aim of the study is to calculate the deformed state of the structurally orthotropic slab of the roadway of a mobile overpass with a check for standard rigidity. Calculations of the roadway for rigidity from moving motor vehicles are performed by means of the Bubnov-Galerkin variational method. The final results include calculations of deflections in the center of the slab clamped along the contour, as well as the conditions for implementing the deflection limitation according to the standards of automobile bridge construction. Based on the results obtained, the design parameters of the slab satisfying the rigidity and strength condition are determined. The studies and calculations conducted allow for the practical design of the roadway structure of the overpass