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Slurry Walls

Slurry Wall construction is the excavation below-grade through stabilizing slurry which supports the excavation walls and prevents caving and water intrusion and the replacement of slurry with purpose-designed backfill.

Slurry Wall Types

Cut-Off (Barrier)
Diaphragm (Structural)

Slurry Excavation Support is Provided by

Hydraulic pressure of the heavyweight slurry acting against the impermeable filter cake established on the trench walls.

Shallow Excavation

Deep Excavation

Slurry Cut-Off Wall Applications

Water control for deep excavations
Cut-off curtains for dams and levees
Contaminated groundwater control
Gas barriers for landfills

Cut-Off Wall Design Steps

Establish geotechnical conditions
Establish hydraulic conditions
Define required barrier flow rate per unit of surface area
Establish wall geometry and properties
Test design backfill mix

Diaphragm (Structural) Slurry Wall Applications

Retaining walls
Heavy foundations
Combination retaining wall-foundations
Combination retaining wall-water control
Associated with the up-down construction technique as basement walls

Diaphragm Slurry Wall Design Steps

1. Establish geotechnical conditions
2. Define adjacent foundations
3. Establish lateral load diagram
4. Define bracing-tieback scheme
5. Design wall for maximum loads
6. Plan panel sizes and sequence of construction
7. Detail reinforcing steel and breakouts
8. Predict movements
9. Plan instrumentation

Slurry Wall Quality Control

Excavation-replacement balance
Depth and width measurements
Foundation material check
Slurry quality tests
Concrete quality check

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