{"id":38848,"date":"2021-09-09T07:27:16","date_gmt":"2021-09-09T07:27:16","guid":{"rendered":"https:\/\/blogs.agu.org\/landslideblog\/?p=38848"},"modified":"2021-09-20T19:57:39","modified_gmt":"2021-09-20T19:57:39","slug":"paimio-a-very-unusual-landslide-in-finland","status":"publish","type":"post","link":"https:\/\/blogs.agu.org\/landslideblog\/2021\/09\/09\/paimio-a-very-unusual-landslide-in-finland\/","title":{"rendered":"Paimio: a very unusual landslide in Finland"},"content":{"rendered":"

Paimio: a very unusual landslide in Finland<\/h4>\n

Last week a very unusual and interesting landslide occurred close to the town of Paimio in Finland.\u00a0 The image below, published on ts.fi,<\/a> provides a wonderful overview of the landslide:-<\/p>\n

\"The

The landslide at Paimio in Finland. Image published by ts.fi.<\/a><\/p><\/div>\n

.<\/p>\n

Once again I don’t think I’ve seen one quite like this before.\u00a0 The source area appears to be an aggregate storage area from a nearby quarry.\u00a0 The aggregate pile has has clearly failed – there is a scar and some tension cracks visible.\u00a0 The material in the fields appears to be clay, common in formerly glaciated areas.\u00a0 The failure of the aggregate pile has propagated through the clay substrate over a distance of perhaps 100 metres, forming a set of compressive ridges.\u00a0 This is unusual.<\/p>\n

It is interesting to ponder what might have happened here.\u00a0 My working hypothesis is that this might be a bearing capacity failure in the clay below the aggregate pile – essentially the clay did not have the shear strength to withstand the stresses imposed by the heap.\u00a0 Its failure caused the pile to collapse.<\/p>\n

The nearest comparative event I can remember of the Hatfield Colliery failure close to my now home in Sheffield, in England<\/a>.\u00a0 In this case colliery spoil was piled on gravels that subsequently failed.\u00a0 However, in the case of the landslide at Paimio the failure has propagated a relatively longer distance from the source, presumable reflecting the properties of the clay.<\/p>\n

Fortunately no-one was killed or injured in the landslide at Paimio, and only one building was damaged.<\/p>\n

The location of the landslide is, I believe, 60.434, 22.610.\u00a0 There is a Google Earth image of the site from 2018:-<\/p>\n

\"Google

Google Earth image of the site of the landslide at Paimio in Finland.<\/p><\/div>\n

.<\/p>\n

Interestingly this image does not show the large pile of aggregate that was involved in the failure, so this might be a comparatively recent addition.<\/p>\n

.<\/p>\n

Acknowledgement<\/h4>\n

Many thanks to loyal reader Tomi for highlighting this one to me.<\/p>\n","protected":false},"excerpt":{"rendered":"

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