Variability Of The Strength Of Soil-Cement Mixtures-Video

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Video Summary

The presentation describes a soil-mixing case study at Robinson Landing, a waterfront development in Alexandria, Virginia. A soil-cement wall created a groundwater cutoff and earth-retention system for underground parking, replacing the original secant-pile design with the trench-cutting remixing deep (TRD) method. The site’s variable soils, debris, and a buried 17th-century merchant ship created significant construction challenges. The speaker explains TRD operations, grout and bentonite use, beam installation, survey controls, and quality testing, including wet-grab samples, permeability tests, and a custom wet-core method. Despite difficulties aligning beams and working around the ship, test results generally exceeded strength and hydraulic-conductivity requirements. The project demonstrated the TRD method’s ability to produce a relatively uniform wall, though the speaker emphasized that TRD is suited only to appropriate site conditions.

Keywords

soil-cement wall

trench-cutting remixing deep

groundwater cutoff

Robinson Landing

soil mixing case study