TECHNICAL CONDITION OF THE REINFORCED CONCRETE BRIDGE ON THE Т-14-04 CHERVONOGRAD – RAVA-RUSSKA ROAD

Abstract

The article considers the results of examination and diagnostics of the technical state of the reinforced concrete bridge. The purposes and tasks of examination, results of visual inspection, instrumental investigations and calculations of constructions of the artificial structures are stated. Their technical state and residual resource are estimated; the conclusions are made.

 Works on examination and diagnostics of the technical state of the bridge on the public road of national importance T-14-04 Chervonohrad - Rava-Ruska, km. 44 + 158 were performed according to the contract in June and July 2019. The central part of the bridge before widening was built in 1956, the widening (finishing constructing) of the bridge was carried out in 1968. The purpose of the examination is to determine the technical state and the possibility of further operation of the bridge. The type of construction is beam, the longitudinal scheme of the bridge is single-span. According to the design standards, groups of structural members of the bridge, namely, bridge deck, supports, baulk structures, underbridge area, approaches were considered. The technical state of the bridge deck and walkway  slabs generally corresponds to state 4 - limited operable. The technical state of the load-bearing structures of the bridge supports corresponds to state from 2 - limited serviceability to 4 - limited operable, some structures of the supports require repairing and strengthening. The technical state of the baulk  structures of the bridge corresponds to the state from 3 - operable to 4 - limited operable, baulk structures need repairing and strengthening. The technical state of the bridge area corresponds to state 4 - limited operable. According to the results of the examination and calculations, the operational states of the structural members of the bridge and the rate of their wear were determined according to the qualification tables. After making calculations according to the design standards, the residual life of the bridge structures was determined, which amounted to 0 years. The final assessment of the technical state of the bridge was carried out according to the indicators: the lowest of the indicators of operational state and a formalized rating E. The technical state of the bridge as a whole corresponds to condition 4 - limited operable. It is recommended to strengthen the longitudinal beams of the artificial structure in the lower zone of the beam seats with carbon bands or liners according to the technology of Sika-Ukraine and to strengthen the beams in the upper zone with different types of reinforced concrete ribbed slab