Application of Modified Epoxy Grouting Fluid for Leakage Repair in Tunnel Engineering: A Breakthrough Solution of High-Pressure Grouting Technology

In tunnel engineering, leakage problems have always been a technical problem that plagues the construction team. The modified epoxy grouting fluid launched by Nanjing KEZU provides an efficient and lasting solution for tunnel leakage repair with its high-pressure grouting technology and 0.02mm micro-crack penetration ability. This technology not only breaks through the limitations of traditional repair methods, but also demonstrates excellent performance advantages through strict durability verification.

Analysis of high-pressure grouting technology

1. Technical principle

Nanjing KEZU's modified epoxy grouting fluid adopts high-pressure grouting technology to inject slurry into the depth of the crack through special equipment. The slurry penetrates rapidly under high pressure, fills micro-cracks and forms a solid waterproof layer.

This technology can handle cracks as low as 0.02mm in width, far exceeding the penetration limit of traditional grouting materials.

2. Construction process

Crack positioning: Use professional equipment to detect the location and depth of the crack.

Grouting preparation: Install the high-pressure grouting needle to ensure a tight connection with the crack.

High-pressure grouting: Inject the modified epoxy grouting liquid into the crack with a pressure of up to 70MPa.

Curing inspection: After the slurry is cured, conduct a waterproof performance test to ensure no leakage.

0.02mm micro-crack penetration: a breakthrough in technical barriers

1. Low viscosity formula

The initial viscosity of the modified epoxy grouting liquid is ≤190MPa·s, which enables it to easily penetrate deep into the micro-cracks to ensure full sealing.

Laboratory tests show that the penetration rate of the slurry in 0.02mm cracks is as high as 95%, far exceeding the industry average.

2. Fast curing and high strength

The slurry cures quickly after contact with moisture, and the initial setting time can be controlled between 40 minutes and 2 hours.

After full curing, the compressive strength is ≥70MPa and the tensile strength is ≥15MPa, ensuring the structural strength and waterproof performance after repair.

Durability verification: guarantee of long-term performance

1. Laboratory test

In the durability test simulating the tunnel environment, the modified epoxy grouting fluid still had no cracking or falling off after 1,000 freeze-thaw cycles.

The anti-seepage pressure is ≥1.2MPa, far exceeding the industry standard, ensuring long-term waterproofing effect.

2. Actual project verification

In a subway tunnel project in Nanjing, KEZU modified epoxy grouting fluid successfully repaired multiple leakage points. After two years of follow-up monitoring, no leakage problems occurred in the repaired area, proving its excellent durability.

Technical advantages and market competitiveness

1. Efficient construction

High-pressure grouting technology greatly shortens the construction time. It only takes 1-2 hours to repair a single crack, which significantly improves the project efficiency.

2. Cost-effectiveness

Compared with traditional repair methods, KEZU modified epoxy grouting fluid reduces material waste and labor costs, and reduces the overall construction cost by 15%-20%.

3. Environmental protection and safety

The grout adopts an environmentally friendly formula, is non-toxic and odorless, and no harmful gas is emitted during the construction process, which meets the green building standards.

Nanjing Kezu's modified epoxy grouting liquid has redefined the standard of tunnel leakage repair with its high-pressure grouting technology, 0.02mm micro-crack penetration ability and excellent durability. Whether in terms of technical performance or economic benefits, this solution has demonstrated strong market competitiveness. Choosing KEZU is not only choosing a grouting material, but also choosing an efficient and lasting engineering future.