Real-time monitoring of bluff stability at Woodway, Washington, USA
By: R.L. Baum, E. L. Harp, W.J. Likos, P. S. Powers, and R.G. LaHusen
Edited by: Evangelista A.Picarelli L.Evangelista A.Picarelli L.
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Abstract
On January 15, 1997, a landslide of approximately 100,000-m3 from a coastal bluff swept five cars of a freight train into Puget Sound at Woodway, Washington, USA, 25 km north of downtown Seattle. The landslide resulted from failure of a sequence of dense sands and hard silts of glacial and non-glacial origin, including the Lawton Clay, a hard, jointed clayey silt that rarely fails in natural slopes. Joints controlled ground-water seepage through the silt and break-up of the landslide mass. During September of 1997, the US Geological Survey began measuring rainfall, ground-water pressures, and slope movement at the bluff where the landslide occurred. Data are collected every 15 minutes and updated hourly on the World-Wide-Web. Pore pressures observed from September 1997 to February 1998 generally were low and pressures near the bluff face, in the upper few meters of the hard clayey silt, increased gradually.
| Publication type | Conference Paper |
|---|---|
| Publication Subtype | Conference Paper |
| Title | Real-time monitoring of bluff stability at Woodway, Washington, USA |
| ISBN | 9058090183 |
| Year Published | 1998 |
| Language | English |
| Publisher location | A.A.Balkema |
| Larger Work Title | The geotechnics of hard soils - soft rocks. Proceedings of the second international symopsium on hard soils-soft rocks, Naples, October 1998. (Two volumes). |
| First page | 1057 |
| Last page | 1065 |
| Conference Title | Proceedings of the second international symposium on hard soils-soft rocks 1998. |
| Conference Location | Naples |
| Conference Date | 12 October 2098 through 14 October 2098 |
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