At Rest Pressure
At rest lateral earth pressure, represented as K0, is the in situ lateral pressure. It can be measured directly by a dilatometer test (DMT) or a borehole pressuremeter test (PMT). As these are rather expensive tests, empirical relations have been created in order to predict at rest pressure with less involved soil testing, and relate to the angle of shearing resistance. Two of the more commonly used are presented below.
Jaky (1948) for normally consolidated soils:
Mayne & Kulhawy (1982) for overconsolidated soils:
The latter requires the OCR profile with depth to be determined.
To estimate K0 due to compaction pressures, refer Ingold (1979)
Read more about this topic: Lateral Earth Pressure
Famous quotes containing the words rest and/or pressure:
“I have had the accomplishment of something like this at heart ever since I was a boy.... So I feel tonight like the man who is lodging happily in the inn which lies half way along the journey and that in time, with a fresh impulse, we shall go the rest of the journey and sleep at the journey’s end like men with a quiet conscience.”
—Woodrow Wilson (1856–1924)
“Amid the pressure of great events, a general principle gives no help.”
—Georg Wilhelm Friedrich Hegel (1770–1831)