If the embankment is found to be unstable, measures can then be taken to stabilize the foundation soils.Īs illustrated in Figure 1-1, there are four major types of instability that should be considered in the design of embankments over weak foundation soils. Once the soil profile, soil strengths, and depth of ground water table have been determined by field explorations and/or field and laboratory testing, the stability of the embankment can be analyzed and a factor of safety estimated. Stability problems most often occur when the embankment is to be built over soft soils such as low strength clays, silts, or peats. Problems with embankments and structures occasionally occur that could be prevented by initial recognition of the problem and appropriate design. Embankment foundation problems involve the support of the embankment by natural soil. Ground stability must be assured prior to consideration of other foundation related items. Use search to quickly locate question answers – open up a search box (ctrl+f), then enter a keyword from the question to navigate you to those terms in the course material Introduction
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