In-Situ Verification Of Soil-Mix Ground Modification

Ground modification by “soil-mixing” is a relatively recent development of improving/stabilizing “soft” soils and re-constituting them effectively as “cemented” materials. In-situ seismic velocity measurements by cross-hole and down-hole procedures, and by clamped techniques for exposed materials such as walls and pits, have disclosed an “S” wave velocity increase from 800 to 2000 feet per second. For excavation stability, the required increase in unconfined compressive strength, to values in the range of 80 to 300 psi, is thus assured.