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 | Nov 6, 2020
Jobsite injuries in New York City decline 20% since 2017
Safety training cited as a cause of improvement.
Codes and Standards | Nov 4, 2020
Commercial building owners having tougher time securing insurance policies and renewals
Insurers’ fears of civil unrest in wake of election prompt builder’s risk coverage moratoriums.
Codes and Standards | Nov 4, 2020
Turn rooftops into revenue generators with solar arrays
Lease or ownership models for PVs make more sense than ever.
Codes and Standards | Nov 3, 2020
The argument against gas stoves includes degraded indoor air quality
Asthma seems to be aggravated by cooking with flame.
Codes and Standards | Nov 2, 2020
Wildfires can make drinking water toxic
Updated building codes could mitigate the danger.
Adaptive Reuse | Oct 26, 2020
Mall property redevelopments could result in dramatic property value drops
Retail conversions to fulfillment centers, apartments, schools, or medical offices could cut values 60% to 90%.
Codes and Standards | Oct 26, 2020
New seismic provisions for the National Earthquake Hazards Reduction Program released
The provisions present a set of recommended improvements to the ASCE/SEI 7-16 Standard.
Codes and Standards | Oct 22, 2020
More than 130 building projects have engaged LEED’s Safety First Credits in response to COVID-19
Best practices helping companies develop and measure healthy, sustainable, and resilient reopening efforts.
Codes and Standards | Oct 21, 2020
New technologies and techniques can ‘future-proof’ buildings
Net-zero principles may give buildings longer lives.
Codes and Standards | Oct 20, 2020
Updated AIA Contractor’s Qualification Statement and Warranty Bond documents available
Statement now includes safety protocols and plans, sustainability, and BIM experience.