Grout mixer used for tunnel excavation
Grout mixer used for tunnel excavation application:
Ground Stabilization: Used to inject a stable grout mixture to improve the load-bearing capacity of weak soils and prevent ground settlement during tunneling.
Water Ingress Prevention: Essential for sealing voids and fractures in the rock formation to prevent water ingress, which can compromise the stability of the tunnel.
Rock Bolting and Anchoring: Grout is used to fill the spaces around rock bolts and anchors, enhancing their holding capacity and ensuring the structural integrity of the tunnel.
Void Filling: After excavation, grout is injected to fill voids and cavities, reducing the risk of collapse and ensuring a safe working environment.
Curtain Grouting: Creates a grout curtain around the tunnel to act as a barrier against groundwater, protecting the tunnel from water damage.
High speed shear colloidal grout mixer can produce ultra-fine, homogeneous grout, often with bentonite, micro-cement, or ultrafine cement, ideal for applications requiring deep penetration, like pre-grouting or fissure sealing.

A colloidal grout mixer used for tunnel excavation is a critical piece of equipment in underground construction projects. It prepares the grout mix that is injected into the ground to stabilize soil, seal groundwater, fill voids behind tunnel linings (like segmental lining), or support surrounding rock formations. To meet these needs, high-performance grout mixers are used to prepare consistent, pumpable, and stable grout mixtures.
In tunneling operations — especially those using Tunnel Boring Machines (TBM) — grouting is essential for:
1. Filling the annular gap between the tunnel lining and the surrounding ground
2. Ground improvement ahead of the tunnel face (e.g., face grouting)
3. Soil stabilization and water sealing

Colloidal grout mixer common applications in tunneling:
Backfill Grouting: Fill the annular space behind the tunnel segments
Face Grouting / Pre-Support: Stabilize the tunnel face before excavation
Ground Improvement: Improve weak zones ahead of the tunnel face
Water Sealing: Seal fractures and reduce seepage
Compensation Grouting: Control surface settlement during tunneling

If you’re working on a tunnel project and need help selecting or specifying a grout mixer system, I can assist based on your:
– Tunnel diameter and length
– Geological conditions
– TBM model and speed
– Grout volume requirements
– Budget and site power availability
Let me know! Email address: sales1@leadcrete.com