Underwater Bridge Pier 2/8 Method Reinforcement Fiberglass Sleeve Supporting Technical Solution

The fiberglass sleeve hydraulic anti-corrosion reinforcement protection technology is a technique for anti-corrosion, strengthening, and reinforcement in the field of hydraulic concrete, developed by Zhongda Hengjian Company by integrating relevant domestic and international technologies and considering China's national conditions. This technology is commonly referred to as the "Two-Eight Method."

I. This technology has the following significant characteristics:

1. It can resist the interactive effects caused by climate cycles, such as drying and wetting, heating and cooling, freezing and thawing, as well as continuous or intermittent corrosive actions from water flow, ocean tides, wastewater, electrolytes, etc., with excellent durability.

2. Due to the inertness of fiberglass sleeves to chemical reactions, they can resist various chemical agents, exhibit strong acid and alkali resistance, and can withstand seawater corrosion.

3. Due to their insensitivity to water, they maintain ultra-strong and tight bonding strength (bond strength up to 2.5 MPa) even during underwater construction. Particularly, the ability to perform "underwater construction" without the need to build cofferdams or invest in expensive drainage equipment makes this an anti-corrosion system that saves time, labor, and costs.

4. The epoxy grout can penetrate into cracks in the base material, forming a dowel structure to better repair and reinforce the original structure.