is to be renovated. The planned new use will result in heavier loadings being imposed onto the substructure including the foundations. The building structure is in good, serviceable condition, but with evidence that some settlement of the foundations has
An existing commercial building (a relatively new structure having a storage type basement) located in an urban area is to be renovated. The planned new use will result in heavier loadings being imposed onto the substructure including the foundations. The building structure is in good, serviceable condition, but with evidence that some settlement of the foundations has occurred; if the existing foundation system is retained, the expected new and heavier loadings would cause further settlement. The existing building foundations are shallow category spread footings located slightly deeper than the basement floor and supported in a stratum of medium-strength clay type soils. Very firm glacial till soil and rock exists from 20 to 25 feet (6 to 7-m) below the basement floor slab and footing foundations. Why might micropiles be a practical choice for improving the foundation support provided for the renovated building?
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