While this building was being constructed, the adjacent Bethesda Metro Complex was being planned. One wall of Clark building is supported on deep-drilled piers in order to avoid underpinning. The rest of the building is on shallow foundations.
Mid-Rise Buildings
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A typical building with 3+ levels of parking below street level. This one is supported on normal spread footings.
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A typical residential building supported on normal spread footings.
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This building is supported on drilled piers (caissons) with bells excavated in high plasticity preconsolidated clay.
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Three buildings supported on top of a large underground garage. Part of the structure is supported on small-diameter, heavily reinforced piers socketed into rock below the subway. The rest is on normal spread footings.
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The case study below illustrates some typical construction techniques.
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A partial failure of the shoring system occurred during construction. See the case study below.
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O'Donnell's restaurant was replaced with 3 levels of underground parking that extend under the street and two roughly 8-story buildings. Spread footings are supported on a combination of weathered rock and soil for 5 to 15 ksf.