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 | May 4, 2017
Millennials’ views on sustainability could influence the workplace
Nine out of ten say it is important that they work for a company committed to sustainability.
Codes and Standards | May 3, 2017
New York State extends design-build authority
The legislation includes eight additional projects.
Codes and Standards | May 2, 2017
U.S. announces preliminary tariffs on Canadian softwood lumber
The rates range from 3% to 24% per producer.
Codes and Standards | Apr 28, 2017
New York man alleged to have posed as licensed architect faces possible prison time
He is charged with defrauding construction companies, business owners, and local governments.
Codes and Standards | Apr 27, 2017
Extensive list of plug load efficiency utility incentives available for free download
The Dept. of Energy resource is a state-by-state compilation with hundreds of listings.
Codes and Standards | Apr 26, 2017
Chicago commits to 100% renewable power for all city buildings
In doing so, it becomes largest U.S. city to make such a pledge.
Codes and Standards | Apr 25, 2017
Concerns over increased construction costs following Trump executive orders
‘Buy American’ requirement and revised H-1B visa restrictions could raise prices on supplies, labor.
Codes and Standards | Apr 24, 2017
‘Staggering delays, exorbitant costs’ in New York City library, cultural building construction
Study finds significant problems with how city manages capital projects.
Codes and Standards | Apr 20, 2017
California lawmakers have had little success in attracting sports stadiums
Only one of several attempts has had an impact in recent years.
Codes and Standards | Apr 19, 2017
Dept. of Energy releases updated versions of EnergyPlus and OpenStudio building energy modeling tools
The updated versions include full support for variable speed DX coils, enhanced plant auto-sizing, new fan model, and support for non-rectangular windows.