EARTHWORK ON PERMAFROST SOILS AND METHOD OF ITS ERECTION WITH BASE REINFORCEMENT IN AREAS OF PERMAFROST PROPAGATION Russian patent published in 2012 - IPC E02D17/18 

FIELD: construction.

SUBSTANCE: invention may be preferably used to erect high (more than 3 m) road embankments on collapsing soils as frozen soils thaw, in earthquake zones where high-temperature (-0.5…-1.5°C) unstable permafrost propagates of interrupted and island nature, under conditions of existing global warming, with optimal use of natural (ecological) mechanisms of permafrost formation and reinforcement. The earthwork contains an embankment and peripheral rock layers joined to each other with an underlying layer of rocky ground contacting with air in slope areas that are water impermeable at the bottom. On the surface of the soil base there is a layer of water-saturated, water-retaining material. In the peripheral rock layers there are air holes arranged that contact with the lower part of a connecting rock layer made in the bottom part from larger rock pieces or trapezoidal gabions (in the form of truncated pyramid) on a partial geotextile layer, submerged into the layer of the water-saturated, water-retaining material. The device is realised by the method of earthwork erection on permafrost soils with base reinforcement in the areas of permafrost propagation.

EFFECT: higher resistance and strength of the earthwork base on permafrost.

8 cl, 2 dwg