What are the inspection items of bridge expansion device?

The inspection items of bridge expansion devices vary according to different expansion devices, and the inspection items are as follows:

Telescopic devices are divided into modular telescopic devices, comb-toothed plate telescopic devices, rubber telescopic devices and special-shaped steel single-slit telescopic devices.

The detection items of modular telescopic device include:

Tensile and compressive tests;

Longitudinal, vertical and transverse dislocation tests;

Measuring horizontal frictional resistance;

Uniformity of displacement;

According to the actual stress load, the stress and strain values of the center beam, the support beam and their connecting parts are determined;

Carry out vibration impact test on the sample;

Carry out waterproof test on rubber sealing tape.

Comb plate expansion device:

Tensile and compressive tests;

Measuring horizontal frictional resistance;

Displacement uniformity.

Rubber telescopic device:

Tensile and compressive tests;

The horizontal friction and vertical deformation were measured at 15-28℃.

Special-shaped steel single seam expansion device;

Waterproof test of rubber sealing tape.