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 | Jul 12, 2017
New International Building Code allows weather-resistive barriers above 40 feet
Danger of propagating flames now deemed negligible.
Codes and Standards | Jul 10, 2017
New mass plywood panel project moves ahead with federal grant
New material is substitute for concrete and steel in multi-story projects.
Codes and Standards | Jul 6, 2017
Trump ups ante on apprenticeships, gives private sector more room to design them
Initiative aimed at alleviating construction industry worker shortage.
Codes and Standards | Jul 6, 2017
Flawed modeling to blame for green buildings failure to live up to hype on energy efficiency
Explains energy performance gap from expected savings to actual savings.
Codes and Standards | Jul 5, 2017
Research study examines tall timber buildings worldwide
Industry group developing criteria for categorizing wide range of construction approaches to tall timber buildings.
Codes and Standards | Jun 30, 2017
AAMA releases new document on aluminum fenestration and energy efficiency
The free download addresses entrances, storefront framing, curtain walls, windows and skylight fenestration systems.
Codes and Standards | Jun 29, 2017
Fire codes prevent cladding used on Grenfell Tower from being used in U.S.
Reports suggest an extra $6,300 for fire-resistant cladding could have prevented the tragedy.
Codes and Standards | Jun 28, 2017
Minimum Design Loads and Associated Criteria for Buildings and Other Structures, Standards ASCE/SEI 7-16, has been updated
The document is used for determining design loads including dead, live, soil, flood, tsunami, snow, rain, atmospheric ice, earthquake, wind, and fire.
Codes and Standards | Jun 27, 2017
Cold-formed steel framing engineering guide for building projects released
Better sound attenuation for subfloors and exterior continuous insulation are among the matters addressed.
Codes and Standards | Jun 26, 2017
L.A.’s new ordinance requires energy and water efficiency benchmarking
Structures 20,000 sf and larger must demonstrate steps to boost efficiency.
