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 | Jun 10, 2021
New York City cracks down on construction site safety
Buildings Dept. issues new safety legislation for City Council consideration.
Codes and Standards | Jun 9, 2021
ASHRAE updates health care facility ventilation standard
Includes improved guidance on thermal comfort, revisions to air filtration requirements.
Codes and Standards | Jun 8, 2021
American Wood Council releases new fire design specification
For design of wood members, assemblies, and connections to meet code requirements.
Codes and Standards | Jun 7, 2021
Guide provides strategies to overcome barriers to sustainable affordable housing
International Living Future Institute document helps with social, regulatory, and financial hurdles.
Codes and Standards | Jun 3, 2021
Conversion of large office buildings to residential will require revamped regulations
Post-1960 offices present ventilation, daylighting, and other challenges.
Codes and Standards | Jun 2, 2021
Dept. of Energy releases EnergyPlus and OpenStudio updates
New features include Python Plugin features and additional tabular reporting options.
Codes and Standards | Jun 1, 2021
Federal plan to double Canadian lumber tariffs draws intense criticism
Builders advised to stock up to deal with shortages.
Codes and Standards | Jun 1, 2021
Passive House standards proving their worth in multifamily sector
Energy performance beats conventionally built by 32% to 58%.
Codes and Standards | May 27, 2021
Pittsburgh combats construction fraud
Crackdown on tax, insurance, and workers’ comp malfeasance.
Codes and Standards | May 26, 2021
Proposal to add photovoltaic panels to the R2 Standard for electronics recycling
Hundreds of facilities in 33 countries could begin recycling PVs.
