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| Title: |
| Authors: |
Paul W. Mayne, Professor, Georgia Institute of Technology, USA (website)
| Abstract: |
A large mat foundation was constructed to support a 13-story dormitory on Piedmont
residual silty soils in Atlanta, Georgia. Prior to construction, the geotechnical consultant
of record estimated maximum expected settlements of the mat on the order of 1.8
inches (46 mm), while the building proceeded to deflect as much as 10 inches (250
mm) at the center and 5 inches (127 mm) at the corners near the end of construction.
Details on the case history are reviewed by an outside observer and placed within the
context of geotechnical practice. In addition to routine soil borings, the use of enhanced
in-situ testing (in this case, flat dilatometer tests) in concert with elastic continuum
solutions would have provided calculated values in line with the observed performance.
residual silty soils in Atlanta, Georgia. Prior to construction, the geotechnical consultant
of record estimated maximum expected settlements of the mat on the order of 1.8
inches (46 mm), while the building proceeded to deflect as much as 10 inches (250
mm) at the center and 5 inches (127 mm) at the corners near the end of construction.
Details on the case history are reviewed by an outside observer and placed within the
context of geotechnical practice. In addition to routine soil borings, the use of enhanced
in-situ testing (in this case, flat dilatometer tests) in concert with elastic continuum
solutions would have provided calculated values in line with the observed performance.
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| Keywords: |
foundations, displacements, elasticity, in-situ tests, mats, rafts, settlements
The International Journal of Geoengineering Case Histories is an independent activity hosted by the Geoengineer Website
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Unexpected but foreseeable mat settlements on Piedmont residuum
International Journal of Geoengineering Case Histories
Paper # IJGCH_1_1_3
ISSN # 1790-2045