Each year, billions of dollars in damage to building foundations and structures is caused by shrinking and swelling behavior caused by clay soil.
In fact, expansive clay soil is the most predominant geologic hazard across the U.S. Several geotechnical solutions can alleviate these problems. On new construction, the options are: removal and replacement, capping or burying the expansive material, and treatment with hydrated lime. Structural solutions in new construction include upgraded structural slabs (post-tension, waffle, mat) or elevated slabs supported on deep foundations.
For an existing structure, a forensic geotechnical study is needed to identify and quantify damages, assign causation, and make appropriate recommendations for remediation. Moisture control may be a suitable option for remediation and it is a design requirement for new construction.
In extreme cases, helical anchors and slab (mud) jacking or removal and reworking of soil below an existing structure is necessary. For paved surfaces, expansive clay soils can be remediated with thicker sections of asphalt, reinforced concrete pavements, and lime treatment.
Related Stories
Codes and Standards | Feb 8, 2019
Oslo, Norway’s downtown goes virtually car-free
Parking spots converted to bike lanes, transit is fast and easy.
Codes and Standards | Feb 7, 2019
New North Carolina energy code has extensive lighting control requirements
Includes automatic shut offs for buildings of all sizes.
Codes and Standards | Feb 6, 2019
Solar carports can help with California’s Title 24 mandates
Can be combined with virtual net-metering software and tax-enabled financing.
Codes and Standards | Feb 5, 2019
Milwaukee board approves rezoning for Western Hemisphere’s tallest mass timber building
Mixed-use tower would rise 21 stories high.
Codes and Standards | Feb 1, 2019
Mass. governor proposes real estate transfer fee hike for climate resiliency projects
Opposed by real estate and trade groups, plan could generate $1 billion in next decade.
Codes and Standards | Jan 31, 2019
New York City will reform construction bid process
Streamlined process intended to improve efficiency, reduce hassle for bidders.
Codes and Standards | Jan 30, 2019
New AGC program aims to diversify construction workforce
More diversity needed to keep pace with demand for workers.
Codes and Standards | Jan 29, 2019
Registration now open for LEED v4.1 for New Construction and Interior Spaces
Emphasizes human health and integrative building design.
Codes and Standards | Jan 25, 2019
AEC professionals should push for net zero projects
Educate and lead clients to more sustainable choices, says LEED fellow.
Codes and Standards | Jan 24, 2019
OSHA unaffected by federal government shutdown
Agency fully funded for first nine months of 2019.