Soil Mixing Wall (RSW)
RSW uses multiple augers and paddle shafts rotating in alternating directions to mix in-situ soil with cement grout, bentonite slurry, clay slurry, or other stabilizing reagent slurries to install continuous subsurface soil-cement walls for excavation support and groundwater or underground pollutants control, or ground reinforcement; column blocks, lattice, or areal patterns for stabilization. The soil cement is usually reinforced with steel H-piles for excavation support and groundwater control. Applicable subsurface soils are soft to stiff silt and clay, loose to very dense sand, gravel, cobble soils, cobble and boulder soil, and bedrock with predrilling.
RSW shoring installations facilitate sheer excavation for grade separation or underground construction in dense urban environments where there isn’t enough room for sloping, and low-noise/low-vibration construction may be required. The RSW method offers advantages over traditional pile and lagging methods by providing groundwater cutoff in high water table environments.
Application & Design
The high demand for space and constantly rising land costs in significant cities increase the construction of multiple-level basements underneath new buildings. RSW is the most effective method for this.
Excavation Support Wall
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RSW walls constructed with wide flange or soldier pile steel beams are very stiff and offer a cost-effective alternative to slurry and secant pile walls.
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Steel H-pile or other reinforcement members are installed inside the soil-cement wall to resist the lateral forces before the soil-cement hardens. The reinforced soil mix wall becomes a structural wall for excavation support and groundwater control.
Cutoff Wall
RSW method installs soil-cement-bentonite walls or soil-bentonite walls for use as barriers to contain groundwater or underground pollutants.
Ground Reinforcement
RSW also installs a soil-cement wall, panel, grid, or block to maintain ground stability, control ground movement, or prevent liquefaction.
