FIELD: bridge engineering.
SUBSTANCE: method of overpass abutment repair consists in preliminary diagnostics and subsequent repair by squeezing and concrete "jacket" device. Preliminary diagnosing of damaged sections of an overpass, in which: diagnosing condition of soils near the base; determining localization of cracks, their shape and direction; determining the reinforcement diameter and its depth, as well as its corrosion degree; determining presence of mutual displacements of parts of the foundation, which is dissected by cracks. Then, repair works are performed. First, concrete surface of abutment dummy and girder are jet-abrasive cleaned. Thereafter, channels are drilled in outermost corner monolithic areas of the abutment. Then, prestressed reinforcement is drawn into channels. Then the plug is mounted on one end of the channel and the channels are filled with injections. Then cracks are injected. Further, reinforcement anchors are installed along the perimeter of the body of the stand and reinforcement grids are installed, after which they are concreted. After that, reinforcement anchors are installed along the perimeter of cross barrel body and reinforcement grids are installed, after which they are concreted. Then, cracks are sealed. After that works on improvement are performed.
EFFECT: disclosed is method of reconstruction and strengthening of existing support of overpass.
3 cl, 7 dwg
