Concrete column reinforcement structure provided with prefabricated dense-hole steel plates and construction method of concrete column reinforcement structure

Abstract

The invention discloses a concrete column reinforcement structure provided with prefabricated dense-hole steel plates. The concrete column reinforcement structure comprises a high-performance cement mortar bonding layer sprayed on the side face of a to-be-reinforced concrete column, the two prefabricated dense-hole-formed L-shaped steel plates fixed to the side face of the to-be-reinforced concrete column and tightly attached to the outer side of the high-performance cement mortar bonding layer, and high-performance cement mortar protective layers sprayed on the outer sides of the prefabricated dense-hole-formed L-shaped steel plates sequentially from inside to outside. The joint of the two prefabricated dense-hole-formed L-shaped steel plates is fixed to the to-be-reinforced concrete column through lap joint angle steel and a high-strength bolt. The invention further discloses a construction method of the concrete column reinforcement structure provided with the prefabricated dense-hole steel plates. According to the concrete column reinforcement structure provided with the prefabricated dense-hole steel plates and the construction method of the concrete column reinforcement structure, the bonding capacity of the inside and outside high-performance cement mortar can be enhanced, and corrosion resistance and fire resistance of the reinforcement structure are also improved significantly. In addition, the prefabricated dense-hole-formed L-shaped steel plates have a very good restriction effect on the inside high-performance cement mortar bonding layer and a concrete beam, andthe mechanical property of the to-be-reinforced concrete column is promoted significantly.

Description

technical field [0001] The invention relates to a building reinforcement structure and a construction method thereof, in particular to a concrete column reinforcement structure of a high-performance cement mortar-prefabricated L-shaped steel plate with dense holes and a construction method thereof. Background technique [0002] Due to the aging of concrete structures, unreasonable use of structures, or changes in building functions, the stress and deformation performance of some concrete columns in the structure often cannot meet the requirements, so the reinforcement technology of concrete columns has become more and more widely used. application. [0003] Existing concrete column reinforcement methods include: enlarging section reinforcement method, replacement concrete reinforcement method, external prestress reinforcement method, outsourcing steel reinforcement method, externally bonded steel plate reinforcement method, pasting fiber composite material reinforcement meth...

AI Technical Summary

Problems solved by technology

[0005] However, the ordinary externally bonded steel plate reinforcement method requires the use of structural glue, which has poor durability, and the level of glue and construction technology determine the quality of the reinforcement effect

Therefore, it has very strict requirements on the environment. The ambient temperature should not be higher than 60°C, and the relative humidity should not be higher than 70%. If there are no special anti-corrosion measures, it is not suitable for use in high-temperature and high-humidity environments.

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