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 24, 2022
Most owners adapting digital workflows on projects
Owners are more deeply engaged with digital workflows than other project team members, according to a new report released by Trimble and Dodge Data & Analytics.
Codes and Standards | Feb 21, 2022
More bad news on sea level rise for U.S. coastal areas
A new government report predicts sea levels in the U.S. of 10 to 12 inches higher by 2050, with some major cities on the East and Gulf coasts experiencing damaging floods even on sunny days.
Codes and Standards | Feb 21, 2022
New standard for ultraviolet germicidal irradiation
The Illuminating Engineering Society (IES) recently introduced the standard, ANSI/IES RP-44-21 Recommended Practice: Ultraviolet Germicidal Irradiation.
Wood | Feb 18, 2022
$2 million mass timber design competition: Building to Net-Zero Carbon (entries due March 30!)
To promote construction of tall mass timber buildings in the U.S., the Softwood Lumber Board (SLB) and USDA Forest Service (USDA) have joined forces on a competition to showcase mass timber’s application, commercial viability, and role as a natural climate solution.
Codes and Standards | Feb 18, 2022
Proposal would make all new buildings in Los Angeles carbon-neutral
Los Angeles may become the next large city to ban fossil fuels from new construction if legislation recently introduced in the city council becomes law.
Codes and Standards | Feb 18, 2022
U.S. Army outlines ambitious renewable energy and decarbonization goals
Net-zero emissions in all procurements and a microgrid at every base among aims.
Codes and Standards | Feb 17, 2022
Pandemic won’t alter urban planning
City planners focused on returning to ‘old normal’.
Codes and Standards | Feb 16, 2022
California court rules affordable housing developers exempt from local zoning
Case could set precedent on state law that overrides local rules.
Codes and Standards | Feb 15, 2022
FORTIFIED resiliency standard expanded to include multifamily sector
Voluntary, beyond-code program aims to protect buildings from severe weather.
Codes and Standards | Feb 10, 2022
Number of Americans at risk of flooding to double in 30 years
Most new risk from new development, not climate change.