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 19, 2018
Structural engineered wood products exempt from new EPA formaldehyde ruling
Exempt products include structural plywood, oriented strand board (OSB).
Codes and Standards | Jun 18, 2018
Seattle City Council repeals controversial new per-worker tax on large employers
Measure was aimed at raising $50 million for homeless services, affordable housing.
Codes and Standards | Jun 14, 2018
Hardscape from development makes ‘1,000-year’ flood in Maryland worse
Impermeable concrete made it easier for water to overwhelm drainage system.
Codes and Standards | Jun 13, 2018
United States Resiliency Council announces support for Calif. earthquake resiliency bill
Measure would help cities identify structures that could fail in major quake.
Codes and Standards | Jun 12, 2018
Congestion pricing for cars is effective in reducing traffic, but a difficult sell
After three years, traffic congestion declined by 30% in London.
Codes and Standards | Jun 11, 2018
First RFP requiring modular construction on New York City housing project issued
Part of Housing 2.0 modular construction initiative.
Codes and Standards | Jun 6, 2018
Buffalo, N.Y., contractor exec pleads guilty to fraud for bid rigging on $750 million contract
LPCiminelli stops functioning as GC in fallout from the case.
Codes and Standards | Jun 6, 2018
LEED should be updated to combat climate change
Hasn’t kept pace with urgency of problem, says clean energy investor.
Codes and Standards | Jun 5, 2018
Sports stadiums and arenas showcase sustainability features
Green venues save owners money, gain positive publicity.
Codes and Standards | Jun 4, 2018
L.A. must transition to cleaner energy, boost transit to reach sustainability goals
City aims to reduce GHGs 60% by 2035 and 80% by 2050.
