Bridge bearing steel backing plate is the stepping stone that plays the role of slope regulation on the bearing, mainly plays the role of leveling bearing, in bridge engineering, the bridge bearing backing plate is generally located between the upper and lower steel plates of the bearing, the position of the bridge bearing leveling steel plate bridge, each bridge has a different longitudinal slope, when the longitudinal slope slope of the bridge is not greater than 1, the plate rubber bearing can be directly arranged on the pier abutment, but the thickness required for the influence of the longitudinal slope should be considered. When the longitudinal slope slope is greater than 1, a wedge-shaped steel plate is added between the embedded steel plate and the steel plate on the bearing to level the beam bottom. The longitudinal slope of the wedge-shaped steel plate must be consistent with the longitudinal slope of the bridge required by the design, to ensure that the bearing is in a horizontal state after the beam is installed, if the longitudinal slope is not accurate, it will cause the bearing bias, premature damage, and cause hidden dangers to the operation of the bridge, and it will be more troublesome to deal with it later.
The thickness of the two sides of the bridge bearing wedge-shaped steel backing plate is not the same, according to the actual operation of the designer, the wedge-shaped steel plate is designed to be of appropriate thickness, thereby reducing the damage of the bearing, the method of adjustment is to add the wedge-shaped steel plate consistent with the slope of the bridge between the wedge-shaped steel plate and the top of the bearing, the stepping stone height is the same, the wedge-shaped steel plate with the same central thickness is adopted, and the stepping stone height is not the same, the leveling steel plate with the same central thickness is adopted.
In the actual engineering, the common wedge-shaped steel plate has square, rectangular, trapezoidal, diamond-shaped, circular, etc., and the main function of the wedge-shaped steel backing plate is to connect the beam and the bearing, so that the bearing can play a better role. The rubber bearing is in the important position of the connection point of the upper and lower structures of the bridge, and is the intermediate link that transmits the vehicle load and structural load of the upper part to the lower structure, and its reliability directly affects the degree and durability of the bridge structure. The wedge-shaped leveling steel plate of the bearing is actually the bearing steel plate, which is literally understood to be the steel plate matched with the bridge bearing, and is the embedded part used when the bridge bearing is installed.