FIELD: construction.
SUBSTANCE: method of strengthening involves drilling a conical opening in the crack mouth, installing a conical plug into the opening, and rigidly attaching it to the metal element. Before installing the plug in the opening, solder is applied on its conical surface, and it is fixed by means of induction soldering. The plug due to the adhesion of the solder with the base metal is included in the joint work with the main element. The cross-section of the metal element is not weakened, and while cooling, additional compressive stresses are created in the crack area, which slow down the crack development.
EFFECT: increasing the operational reliability of the span structure with a crack in the wall of the main beam.
4 dwg
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