Definition of load-carrying ability of supports

     The support ability of constructions which are taking place in various conditions on character of load-carrying ability of a ground , is differently loaded, that it is possible to see at realization spectrum-acoustic flaw-detection.
     The highway bridge through the river Slavjanka (Saint Petersburg) leans(bases) on 6 support which role is executed with round reinforced-concrete columns in height of 4 m. These columns, in turn, lean(base) on two reinforced-concrete horizontal beams.
     Spectral-acoustic flaw-detection was made after vibration of the bridge has increased at passage through it of machines.

     By a result of the spectral-acoustic research of supports of the bridge it was found out, the supports NN 2 and 3 have the increased sound on the frequencies appropriate to their length. It unequivocally testifies that these two supports are less pressed down by the bridge, than other four. The research of the horizontal supports has shown a fracture between supports N1 and N2. The further researches with the help of SSP method have shown, that the fracture in a horizontal supports has arisen that its site on which support NN 2 and 3 base, is in a zone of the lowered load-carrying ability of a ground.