T-beam strengthening by sticking steel

T-beam strengthening by sticking steel

Reinforcement construction: During the construction process, cracks and damaged concrete are repaired first. We are going to glue a steel plate on it. Because most of the bridge has a relatively high span, the steel plant adopts gondola engineering and fasten seat belts. The concrete engineering is divided into two parts: pre-production, steel plate and steel plate.

The preparatory work before the reinforcement of T-beam by bonding steel mainly includes the following aspects:

Bridge crack inspection;

Cleaning, sealing and gluing of cracks on the surface of parts.

Repair defects on the concrete surface to ensure that there are no impurities to repair.

Use a steel brush to remove the rusted part of the exposed steel bar surface, exposing the fresh metal part, and apply a steel bar protective agent to the treated steel bar. The protective agent can be directly applied to the surface of the steel bar, generally 1 to 2 times. Pasting steel plate mainly includes: drilling and installing bolts; steel plate production and installation; glue distribution; glue filling; steel plate anti-corrosion work.

T-beam strengthening by sticking steelThe following points must be noted.

The surface of the concrete to be bonded is smooth, hard and clean. Derust the steel plate thoroughly, and the surface also has a certain degree of roughness.

Choose the adhesive material carefully and the mix ratio must be accurate.

Before pasting, drill holes in the beam concrete and install anchor bolts (also used as fixing parts and compression parts). It is required to bury firmly and have reliable pull-out resistance to maintain effective pressure when pasting the steel plate, and also help the steel plate to overcome Shearing force is conducive to the durability of the paste.

Pay attention to the fullness of the paste when pasting.

The surface of the steel plate should be treated with rust prevention and the appearance of the beam body to be strengthened.