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Cut-Off Wall Construction

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What is Cut-Off Wall Construction?

Cut-off wall construction involves creating impermeable underground barriers that block groundwater migration and prevent soil erosion. Using trenchless polymer injection, cut-off walls are installed without open excavation, protecting infrastructure from water infiltration and foundation instability.

Problems Solved

  • Groundwater migration causing erosion or instability
  • Seepage through levees, dams, and embankments
  • Soil loss beneath structures from water infiltration
  • Cracking or displacement in walls, foundations, and subgrades
  • High costs and risks from traditional excavation methods

Types of Polymers Used

High-Density Polyurethane Foams

  • Expands to densify and stabilize loose backfill soils
  • Provides lightweight reinforcement without added soil pressure
  • Cures rapidly to minimize operational disruption

Structural Polyurethane Resins

  • Creates rigid reinforcement zones behind walls and utilities
  • Transfers structural loads to stable ground layers
  • Extends service life of supported structures

Hydro-Insensitive Polymers

  • Expands and cures in wet or groundwater conditions
  • Seals voids and prevents erosion in saturated soils
  • Provides long-term durability in challenging sites
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Watertight Barriers for Long-Term Groundwater Control

Cut-off wall construction with polymer injection provides a trenchless method to stop groundwater migration and protect infrastructure. These solutions are fast, durable, and cost-effective compared to traditional methods.

Restore Stability to Critical Backfill Zones

  • Blocks groundwater infiltration and soil erosion
  • Creates watertight, long-lasting underground barriers
  • Requires no open excavation or extended downtime
  • Protects infrastructure foundations and embankments

Key Applications

Levees & Dams

Stops seepage and protects water-control structures

Flood Protection Systems

Creates watertight barriers beneath embankments

Underground Facilities

Seals groundwater away from basements and tunnels

Utility Corridors

Prevents infiltration into pipelines and vault structures

Tank Farms & Pads

Protects containment areas from groundwater migration

Transportation Corridors

Stops erosion and seepage beneath highways and rail embankments

Services

Cut-off wall construction is supported by these services:

Chemical Grouting

Chemical Grouting

Seals seepage paths and stabilizes soils to control groundwater movement

Soil Stabilization

Soil Stabilization

Reinforces weak soils around cut-off wall systems

Void Filling

Void Filling

Eliminates cavities contributing to groundwater flow

Waterproofing & Leak Sealing

Waterproofing & Leak Sealing

Creates watertight barriers against infiltration

Structural Reinforcement

Structural Reinforcement

Restores long-term durability in compromised foundations

Grout Curtain Barrier Systems

Grout Curtain Barrier Systems

Forms continuous subsurface barriers to block seepage and protect structures from groundwater intrusion

How the Process Works

1

Investigation

Sites inspected for seepage, soil loss, or infiltration risks

2

Planning

Cut-off wall design developed based on site and hydrogeology

3

Access

Small-diameter injection points installed with minimal disruption

4

Injection

Expanding polymers form impermeable barriers in soil zones

5

Monitoring

Placement tracked in real time to ensure continuous cutoff walls

6

Validation

Final inspection confirms watertight, reinforced performance

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