This kind of reason is generally caused by the thinning of steel bars or floors, which should be reinforced and thickened (designed by the original design unit or the design unit with the same qualification). ) Common methods are:

Enhanced thickening method

Generally speaking, the board surface can be treated with steel wire mesh. First, cut off the surface layer, spread steel mesh (shear wall should be reinforced, brick wall should be bored with 600mm*600mm slot longitudinally), and finally concrete pouring with the same strength as structural plate is adopted.

Strengthening force exchange and transfer direction method

The bottom of the board can be strengthened with carbon fiber.