| Autor: |
Kraft Jr., Leland M., Gavin, Thomas M., Bruton, Jon C., Kraft Jr., Leland M., Gavin, Thomas M., Bruton, Jon C. |
| Zdroj: |
Journal of Geotechnical Engineering; October 1992, Vol. 118 Issue: 10 p1577-1591, 15p |
| Abstrakt: |
In December 1985, construction began on the offshore portion of the Renton Effluent Transfer System. Under the auspices of the Municipality of Metropolitan Seattle Metro, treated effluent is pumped to Duwamish Head where the flow is separated into two 1.63mdiameter steel pipes that extend about 3,050 m offshore into Puget Sound. A 155m long diffuser section at the end of each pipe rests in about 185 m of water. A submarine slide occurred in Puget Sound during the dredging operation for the construction of the offshore portion of the pipeline. The slide occurred during low tide and involved 400,000m3of mediumdense sands to a thickness of up to 12 m. The failure and an evaluation of the contributing causes are described in this paper. The failure is attributed to a collapse mechanism in the soil causing liquefaction as a result of low tidal conditions combined with details of the dredging operations. |
| Databáze: |
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