Foundation Design
The Geology of Central Texas, or Why Foundations Do Funny Things
Introduction Central Texas has one of the most geologically diverse small regions to be found anywhere in the world. The many geologic layers, folds and faults cause different types of soil to outcrop in great profusion in this region. Many people have heard of the Balcones Fault. This is a system of many faults that…
Read MoreDefining Foundation or Structural Failure
When has a foundation or any other structural unit failed? There are three categories in which a structure could be placed with regard to structural performance: Obvious failure: Collapse Major distress and distortion Functionality Impairment Obvious non-failure: No distress No distortion Not so obvious: Some distress Some distortion Partial functionality impairment Case I and case…
Read MoreShrinkage Crack Considerations for Post-Tensioned Foundations
Shrinkage cracks in concrete slab-on-ground foundations are a significant public relations problem to home builders. All concrete will shrink during the curing process which lasts up to a year after the time concrete is placed in the forms. Curing involves loss of water from within the concrete, both when it is in a plastic state…
Read MoreGeological Faults and Foundation Design
Austin and Central Texas abounds with geologic faults, the most prominent of which is the Balcones Fault, or “fault system”. These faults are especially common in a band, which runs north and south through Austin and similar areas in Georgetown, Round Rock, Buda, Kyle, San Marcos, New Braunfels and parts of San Antonio. The band…
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