Bibliographic Details
| Title: |
Retrogressive slope failure in glaciolacustrine clays: Sauga landslide, western Estonia |
| Authors: |
Kohv, Marko1 marko.kohv@ut.ee, Talviste, Peeter2, Hang, Tiit1, Kalm, Volli1 |
| Source: |
Geomorphology. Dec2010, Vol. 124 Issue 3/4, p229-237. 9p. |
| Subjects: |
Slopes (Physical geography), Clay, Landslides, Borehole gravimetry, Geology, Vane shear tests, Topographical surveying |
| Geographic Terms: |
Estonia |
| Abstract: |
Abstract: The largest recent landslide in Estonia (ca 60000m3), which occurred on 19 December 2005, has been investigated, modelled and monitored. Eight boreholes, geotechnical sampling and nine vane shear tests provided data on the geological setting, soil strength parameters and location of the rupture zones. Topographic surveys were carried out twice a year from April 2006 to April 2009 to monitor the evolution of the slope. Limit equilibrium modelling displayed a complex of six separate retrogressive failures, beginning near to the Sauga River and ending 75m from the former river channel. Modelling results are in agreement with the actual morphology of the multiple landslides. Monitoring records the enlargement of the landslide as the Sauga River downcuts through the slide and erodes its toe. Strength loss in the varved clays underlying the slope is a key factor in failure development. [Copyright &y& Elsevier] |
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| Database: |
Engineering Source |
