Grout plant for tunnel project
A grout plant for tunnel projects is a specialized system used in underground construction, especially in Tunnel Boring Machine (TBM) or shielded TBM operations. Its primary function is to prepare and supply grout mixtures used to fill the annular space between the tunnel lining (segments) and the surrounding ground.
A grout plant for tunnel projects is a high-capacity, automated system designed to produce, store, and pump large volumes of grout (cementitious, chemical, or resin-based) for critical tunneling applications. These plants ensure consistent mix quality, rapid delivery, and precise injection – vital for ground stabilization, waterproofing, and segment sealing.

Applications of grout plant for tunnel project:
Shield TBM Tunneling
Pipe Jacking / Microtunneling
Ground Improvement Works
Underground Metro Projects
Mine Tunneling
Sewer & Utility Tunneling

Types of Grout Used in Tunnel Projects:
Type | Composition | Use Case |
---|---|---|
Cement-based Grout | Cement, sand, water, bentonite, additives | Most common; fills annulus behind segments |
Bentonite-based Grout | Bentonite, CMC, polymers | Low strength, self-leveling; used in soft ground |
Two-component Chemical Grout | Epoxy, polyurethane, acrylate | High-strength sealing; used for water cutoff |
Microfine Cement Grout | Ultra-fine cement particles | For fine cracks and seepage prevention |