Tunnel Crack Repair Method

In the field of building waterproofing and engineering maintenance, water-soluble polyurethane plugging agents are gradually becoming the new favorite of the industry with their unique performance and environmental advantages. Whether it is basement seepage, tunnel cracks or roof leaks, this material can provide efficient and lasting solutions. This article will deeply analyze its basic principles, core parameters and application scenarios to help you fully understand this revolutionary material.   Why can water-soluble polyurethane plug leaks efficiently? Water-soluble polyurethane plugging agent is a polymer material with water as the dispersion medium. Its plugging principle can be divided into three steps:   Penetration and diffusion: After the liquid plugging agent is injected into the crack, it quickly penetrates into the fine pores, even into the 0.1mm crack.   Reaction with water: The active ingredients in the material undergo polymerization reaction after contact with water to generate an elastic gel with an expansion rate of 200%-300%, which can tightly fill the cracks.   Elastic sealing: After curing, a highly elastic and highly adhesive waterproof layer is formed to adapt to structural deformation (such as thermal expansion and contraction) and prevent leakage for a long time.   Technical highlights:   Environmentally friendly and non-toxic: no solvent, VOC content close to zero, safe construction.   Quick response: adjustable gel time (3 minutes to 1 hour) to meet the needs of different working conditions.   Application scenarios: Where is water-soluble polyurethane plugging agent needed? Underground engineering   Basement seepage: repair wall cracks and joints leakage to resist groundwater pressure.   Underground garage: solve the problems of ground moisture and structural cracks.   Municipal and transportation facilities   Tunnel plugging: repair lining cracks to prevent water seepage from causing structural corrosion.   Bridge joint sealing: adapt to expansion and contraction deformation under dynamic loads.   Industrial and civil buildings   Roof waterproofing: quickly repair roof cracks and resist rain erosion.   Pipeline well plugging: seal the leakage points around the water supply and drainage pipelines.   Water conservancy project   Dam crack repair: long-term waterproofing to ensure the safety of water conservancy facilities.   Practical application effect Case 1: Leakage control of a subway tunnel   Problem: Cracks in the tunnel lining lead to serious water seepage in the rainy season.   Solution: Inject water-soluble polyurethane plugging agent, and set the gel time to 15 minutes.   Effect: Leakage is completed within 24 hours, and there is no recurrence in 3 years.   Case 2: Waterproof renovation of the basement in an old community   Problem: There are many cracks on the basement wall, and the depth of water accumulation in the rainy season reaches 10cm.   Solution: Use low-viscosity water-soluble polyurethane to penetrate and repair fine cracks.   Effect: Dry and leak-free after construction, highly praised by residents.   Why choose water-soluble polyurethane plugging agent？ Efficient and convenient: single-component material, no mixing, direct grouting construction.   Durable: The elastic sealing layer can resist structural deformation and has a lifespan of more than 10 years.   Environmentally friendly and safe: no toxic volatiles, suitable for use in confined spaces.