Quickerde
Quickerde describes a soil whose consistency ranges between plastic and liquid. When subjected to mechanical stress, it can liquefy immediately, only to be quasi-solid again in the next moment. The cause of soil liquefaction is - as with Quickton and quicksand - the phenomenon of thixotropy . Such ground movements can cause great damage.
The term was coined in 1948 by Ernst Ackermann , who examined several ground fractures during his stay in Norway . He was able to trace a ground fracture in the Lerkedal railway cut near Trondheim to the liquefaction of a thin Quicker earth horizon, which served as a sliding layer. The landslide was triggered by the vibrations from overburden trains and excavators.
literature
- Ernst Ackermann : Quick earths and flow movements in landslides . In: Journal of the German Geological Society . tape 100 (1948) , October 25, 1950, pp. 427-466 .
- Hans Murawski : Quickerde . In: Geological Dictionary . 9th edition. Enke, Stuttgart 1992, p. 160 .