Solution
The project adopted Mankate’s Pre-Tensioned CFRP Plate Prestressing System to reinforce the basement slab through active strengthening. This solution enhances load-bearing capacity and overall structural stiffness without damaging the original structure.
To overcome the limitations of traditional methods, such as structural damage and long construction periods, the project implemented the Pre-Tensioned CFRP Plate Prestressing System.
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Ultra-thin bonding between the anchorage and the concrete substrate is achieved through a corrugated-tooth anchorage system, eliminating the need for large-scale slot cutting and minimizing secondary damage to the slab.
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The carbon fiber plates are manufactured from high-strength materials, offering tensile strength over 10 times that of conventional steel. Combined with detachable aluminum-magnesium alloy anchors, prestress is progressively applied using hydraulic tensioning equipment, inducing pre-strain before external loading. This effectively suppresses crack propagation and enhances structural stiffness.
During installation, cracks were first sealed by grouting. Hydraulic jacks were then used to precisely align and tension the system, ensuring coordinated load transfer between the CFRP plates and the structure.
After reinforcement, the anchorage ends were coated with epoxy adhesive and sealed for protective treatment. The plate surfaces were treated with appropriate bonding materials and epoxy mortar, forming a multi-layer protective system against groundwater corrosion and UV aging.
Project Results
The load testing results confirm a significant
improvement in load-bearing capacity. Crack
development was effectively controlled, meeting
long-term safety requirements for commercial and
traffic use.
