Reliable Grouting Solutions for Tunnel Support and Backfill
Grouting materials for vault backfill, void filling behind the lining, water leakage treatment and initial support anchoring, supported by on-site technical guidance.
Tunnel Grouting Solutions
Voids behind the lining, uncompacted vault backfill and water leakage are the main issues affecting structural safety and long-term durability in tunnelling. Our grouts combine high flowability, zero bleeding and micro-expansion so they fill narrow voids completely and compensate shrinkage, making them suitable for backfill, anchoring and sealing works in mountain tunnels, shield-driven metro lines and railway tunnels.
Key Parameters
- Compressive Strength (28d)
- β₯60.0 MPa
- Initial Flowability
- β₯320 mm
- Bleeding Rate
- 0%
- Vertical Expansion Rate
- β₯0.020%
- Initial Setting Time
- β₯120 min
- Test Standard
- GB/T 50448
Tunnel Engineering Applications
Covering the main grouting stages of tunnel construction
Vault Backfill & Void Grouting
Fills voids behind the lining so the support structure stays in contact with the rock mass.
Steel Arch & Anchor Anchoring
High-strength early-strength grout for rapid anchoring of initial support elements.
Water Leakage Treatment
Suitable for grouting cracks, construction joints and deformation joints in tunnel linings.
Metro & Railway Tunnels
Meets durability and impermeability requirements of metro and railway tunnel projects.
Recommended Products for Tunnel Engineering
Grouting materials for backfill, anchoring and sealing
Tunnel Vault Grouting Material
High-flow, micro-expansive grout for vault backfill and void filling behind the lining.
Learn More β
Prestressed Duct Grouting Material
Low-bleeding, micro-expansive grout for prestressed ducts in tunnel linings.
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Underwater Non-Dispersible Grouting Material
Non-dispersible, self-levelling grout for water-rich strata and underwater sealing.
Learn More βWhy Choose Jianghuai for Tunnel Grouting
Complete filling, durable performance, easier application
High Flow, Zero Bleeding
Flowability β₯320 mm with 0% bleeding fills narrow voids behind the lining completely.
Water and Freeze Resistance
Stable performance in wet strata and under freeze-thaw cycles, suitable for underwater sealing.
Micro-Expansion, No Shrinkage
Expands slightly after hardening, compensating shrinkage and keeping contact with rock and lining.
Need Grouting Materials for a Tunnel Project?
Tell us the geology and construction stage, and our technical team will recommend the mix and method.