Waterproofing & Leak Sealing
Blocks groundwater infiltration in tunnels and vaults
industriestunnel underground infrastructure
Tunnel & Underground Infrastructure
What is Tunnel & Underground Infrastructure?
Tunnel and underground infrastructure includes transit tunnels, utility vaults, basements, and other subsurface facilities. These assets face constant pressure from soils and groundwater, requiring watertight sealing and stable foundations to ensure safe and reliable operations.
Challenges in Tunnel & Underground Infrastructure
- Groundwater infiltration through joints, cracks, or penetrations
- Soil erosion causing voids and instability around structures
- Settlement undermining tunnels, vaults, and underground facilities
- Cracking or displacement from soil movement or water pressure
- High operational risks and costs from tunnel closures and flooding
Types of Polymers Used
High-Density Polyurethane Foams
- Expands to fill voids beneath foundations and slabs
- Provides lightweight reinforcement without adding load
- Cures quickly to minimize business interruption
Structural Polyurethane Resins
- Strengthens soils supporting commercial structures
- Provides rigid reinforcement for pavements and parking areas
- Extends the service life of retail and office assets
Hydro-Insensitive Polymers
- Expands and cures in wet or saturated soils
- Blocks groundwater infiltration in below-grade structures
- Maintains performance in challenging site conditions
Benefits of Tunnel & Underground Infrastructure Solutions
Trenchless polymer injection provides watertight sealing and soil stabilization for underground facilities. These solutions prevent infiltration, restore stability, and extend the life of tunnels, vaults, and transit systems without disruptive excavation.
Long-Term Protection for Subsurface Structures
- Seals leaks in tunnels, vaults, and underground structures
- Stabilizes soils to prevent settlement and erosion
- Minimizes downtime with trenchless application
- Provides durable, long-term protection under pressure
Key Applications
Transit Tunnels
Seals leaks and stabilizes soils around subway and light rail systems
Utility Vaults
Protects electrical, water, and telecom vaults from infiltration and soil loss
Basements & Below-Grade Facilities
Provides watertight protection for underground commercial structures
Underground Utilities
Seals leaks and reinforces soils around water and sewer corridors
Cut-and-Cover Structures
Stabilizes soils and prevents groundwater infiltration in shallow tunnels
Culverts & Drainage Systems
Restores watertight conditions and stability in underground storm water assets
Services & Solutions
Common stabilization and repair methods applied to tunnel and underground assets include:
Void Filling
Void Filling
Eliminates subsurface cavities caused by erosion and infiltration
Soil Stabilization
Soil Stabilization
Reinforces soils surrounding underground structures
Settlement Mitigation
Settlement Mitigation
Corrects displacement in vaults, tunnels, and utilities
Structural Reinforcement
Structural Reinforcement
Provides durable support for compromised underground assets
Crack Repair
Crack Repair
Seals joints and cracks to restore watertight integrity
How the Process Works
1
Investigation
Tunnels and underground assets inspected for leaks, voids, or settlement
2
Planning
Injection design developed to restore water tightness and stability
3
Access
Small-diameter injection points installed with minimal surface disruption
4
Injection
Expanding polymers placed to seal leaks and stabilize soils
5
Monitoring
Flow and placement tracked in real time to ensure full coverage
6
Validation
Final inspection confirms watertight performance and stability
Get Started with Expert Support
Phone
800-240-7868Have a project in mind or need more details about our services? Connect with our team today to discuss your challenges and learn how URETEK solutions can deliver lasting results.