Waugh Chapel South Building 11, Crofton, MD

  • Three-story steel framed building is situated over controlled fills and native soils at a former sand and gravel mine.
  • GTA performed design-phase exploration for the building. GTA’s exploration included two in-situ dilatometer soundings. The results of the DMT soundings allowed us to significantly increase the allowable bearing pressure that was previously assigned, based on Standard Penetration Test (SPT) data, resulting in reduced footing sizes, and construction cost savings.

Ballard Green, Baltimore County, MD

  • The development plan for the 105-acre, 521-home mixed-use community called for depths of fill up to 12-18 feet over portions of existing gas pipelines.
  • The gas company required detailed evaluation to ensure that the fill loads would not impact the pipelines.
  • DMT soundings were used to estimate the soil stiffness and resulting settlement beneath each pipeline.
  • GTA was able to more accurately estimate soil settlements resulting in a less conservative analysis.

University Terrace, Washington, D.C.

  • GTA provided value-engineering recommendations for a single-family house to be constructed at the location of a former tennis court and several retaining walls which were to be reused to support the basement walls.
  • GTA’s exploration program included excavator-pushed DMT soundings, performed adjacent to the existing retaining wall concrete footings.
  • Spread footings were recommended, thus eliminating the need for a specialty foundation system, and saving a significant cost for the project.