Chlorine salt corrosion resistant prestressed concrete solid square pile and construction method thereof

By adding mineral admixtures and composite anti-corrosion and rust inhibitors to concrete piles, and combining this with grouting around the piles to form a low-permeability barrier, the problem of chloride ion corrosion was solved, the durability and safety of the concrete piles were improved, and a systematic anti-corrosion effect was achieved.

CN121675403APending Publication Date: 2026-03-17XIAMEN BRANCH OF CCCC THIRD HARBOR ENG
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Patent Information

Application Number
CN202610007306.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-01-06
Publication Date
2026-03-17

AI Technical Summary

Technical Problem

In existing technologies, concrete piles are susceptible to chloride ion corrosion in coastal, saline-alkali land, or engineering environments where de-icing salt is used, leading to steel reinforcement corrosion, which affects structural safety and durability, and there is a lack of systematic anti-corrosion solutions.

Method used

The system employs prestressed concrete solid square piles resistant to chloride salt corrosion. By adding mineral admixtures and composite anti-corrosion and rust inhibitors to the concrete body of the pile, along with polyurea waterproof coating, and pre-embedding sacrificial anode blocks and fiber optic grating sensors inside, and forming a low-permeability ring-shaped solidified barrier through grouting around the pile, a multi-layered protection system is formed.

Benefits of technology

It significantly improves the durability of concrete piles, eliminates the risk of pile perimeter liquefaction, provides a systematic solution against chloride salt corrosion, and extends the design service life.

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Abstract

The invention discloses a chlorine salt corrosion resistant prestressed concrete solid square pile and a construction method thereof, a cementing material of a pile body concrete body of the square pile comprises a mineral admixture accounting for 50%-70% of the total mass of the cementing material, and the cementing material adopts Portland cement; sacrificial anode blocks electrically connected with the main reinforcements are embedded in the pile body concrete body. The pile body concrete body is doped with a composite corrosion-resistant and rust-resistant agent; the outer surface of the pile body concrete body is coated with polyurea waterproof paint or epoxy seal primer. An electromigration type corrosion inhibitor and a microcapsule containing bacillus are doped into the pile body concrete body; the prestressed main reinforcements are steel reinforcements with anti-corrosion coatings; and fiber bragg grating sensors are pre-embedded around the prestressed main reinforcements. The mixing proportion of the concrete body of the pile body is specially designed for fixing and blocking chloride ions, an inapplicable sulfate-resistant cement scheme is abandoned, and the chlorine salt resistance is improved from the source of materials.
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