Pressure Grouting
Pressure grouting strengthens ground, fills voids, and reduces water infiltration by injecting grout into soil, fractured rock, or void spaces. This technique supports slope stabilization, foundation improvement, landslide remediation, and structural repairs.
Understanding Pressure Grouting
Pressure grouting strengthens ground, fills voids, and reduces water infiltration by injecting grout into soil, fractured rock, or void spaces. This technique supports slope stabilization, foundation improvement, landslide remediation, and structural repairs.
By improving ground properties in-situ, grouting provides solutions where excavation and replacement are impractical.
Drilling 
Grouting Typical Applications
How It Works
Our proven methodology ensures consistent, high-quality results for every installation.
Hole Drilling
Drill injection holes into the target zone at designed spacing and depth.
Packer Installation
Install mechanical or inflatable packers to isolate treatment zones.
Grout Injection
Pump grout at controlled pressures while monitoring take and ground response.
Verification
Confirm treatment effectiveness through water testing, coring, or monitoring.
Key Advantages
In-Situ Treatment
Improves ground properties without excavation, ideal for sites with existing structures or access constraints.
Water Control
Seals fractures and voids that allow water infiltration, protecting structures and improving stability.
Void Filling
Addresses sinkholes, abandoned utilities, and subsurface voids that threaten surface structures.
Versatile Application
Multiple grout types and injection methods allow treatment of diverse ground conditions.
Immediate Results
Ground improvement is achieved during injection; results can be verified immediately.
Technical Considerations
Soil/Rock Conditions
Grout type and injection method selected based on soil/rock permeability. Fine soils require chemical or microfine grouts; coarse soils accept cement grout.
Groundwater
Grouting can seal water pathways but must account for groundwater flow during injection. Water testing verifies treatment effectiveness.
Load Capacity
Compaction grouting densifies loose soils to increase bearing capacity. Design loads verified through testing.
Spacing
Hole spacing depends on grout travel distance and treatment objectives. Typical grids range from 3-10 ft.
Installation Method
Staged injection from bottom-up controls grout placement. Pressure monitoring prevents hydraulic fracturing or unintended ground displacement.
Equipment Used
- Drill rigs for hole installation
- Grout mixing and pumping plants
- Mechanical or inflatable packers
- Pressure gauges and flow meters
- Monitoring equipment
Limitations
- Grout travel unpredictable in highly fractured rock
- Pressure limits required to prevent heave
- Temperature affects cure time
- May require multiple injection stages
Technical Specifications
System Variations
Compaction Grouting
Dense, low-mobility grout displaces and densifies loose soil without permeating the soil matrix.
Best For:
- Settlement remediation
- Sinkhole treatment
- Foundation improvement
Permeation Grouting
Low-viscosity grout permeates soil pores without displacement, strengthening the soil mass.
Best For:
- Water control
- Fine soil stabilization
- Contamination barriers
Fracture Grouting
Controlled fracturing and grout injection to improve rock mass properties and seal water paths.
Best For:
- Dam foundations
- Rock fracture sealing
- Tunnel waterproofing
Chemical Grouting
Reactive chemical grouts for fine soils and rapid water control applications.
Best For:
- Emergency water cutoff
- Fine-grained soil treatment
- Rapid-set requirements
Integration With Other Systems
Micropiles
Grouting improves ground around micropiles while piles provide structural load transfer.
Learn More
Horizontal Drains
Grouting seals water pathways while drains manage residual groundwater.
Learn More
Soil Nailing
Grouting can pre-treat weak zones before soil nail installation for improved performance.
Learn MoreExample Project Types
- Foundation repair and underpinning
- Sinkhole remediation
- Dam foundation treatment
- Tunnel waterproofing
- Landslide stabilization
- Mine void filling
- Soil improvement for construction
Our Work in Action
Why Choose Rock Supremacy for Pressure Grouting
Specialized Crews
Our grouting teams have extensive experience with controlled pressure injection in varied geological settings.
Field Instrumentation
Real-time pressure and flow monitoring ensures treatment effectiveness and prevents ground damage.
Multiple Grout Types
We select cement, microfine, or chemical grouts based on ground conditions and project objectives.
Verification Testing
Water testing, coring, and monitoring confirm treatment effectiveness before project completion.
Integrated Solutions
Grouting is combined with drainage, anchoring, and other techniques for comprehensive stabilization.
Our Work
See how we've applied this technique and others to solve real-world geotechnical challenges.
Bingham Canyon Mine Support
Highwall stabilization in one of the world's largest open-pit mines to ensure safe ongoing extraction.
I-70 Corridor Stabilization
Installed 50,000 sq ft of high-tensile mesh and performed extensive scaling after a major weather event.
Lava Hot Springs Slope Stabilization
Multi-phase slope stabilization project protecting the historic hot springs resort and Highway 30 from an active landslide.
Pressure Grouting FAQ
Client Testimonials
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Related Techniques
Explore other engineering methods we use to deliver comprehensive geotechnical solutions.
Horizontal Drains
Horizontal drains are drilled drainage systems designed to lower groundwater pressure and improve the stability of slopes, embankments, and rock faces. By relieving pore pressure, these drains significantly reduce the risk of landslides, sloughing, and long-term slope movement.
Micropiles
Micropiles are small-diameter, high-strength deep foundation elements used to transfer loads into competent ground. Their versatility makes them ideal for underpinning, slope stabilization, and situations with limited access or difficult geology.
Rock Bolting
Rock bolting stabilizes fractured, jointed, or unstable rock masses by anchoring steel bars deep into competent rock. By tying loose blocks back to stable substrate, rock bolts improve the overall strength and cohesion of slopes, cuts, tunnels, and vertical faces.
Soil Nailing
Steel bars driven into soil to reinforce and stabilize loose ground or slope faces.