DRAINAGE SYSTEM Russian patent published in 2012 - IPC E02B11/00 

FIELD: construction, road engineering.

SUBSTANCE: invention relates to the field of construction under complicated natural-climatic and engineering-geological conditions, including permafrost, and may be used to construct and reconstruct any structures, for instance, buildings, earth beds of railway and motor rods, manifold pipelines, weirs and dams on loose bases and eroded soils. The drainage system comprises an upper longitudinal drain trench with a drain pipe filled with a macroporous draining material and arranged outside the drained area perpendicularly to an upland part of the relief for the depth of the seasonal freezing layer and a water impermeable screen arranged in the lowland part of the drainage trench below the seasonal freezing depth. The drainage system is equipped with a lower longitudinal drainage trench made within the borders of the drained area at the depth of the seasonal freezing layer and filled with a coarse-fraction draining material and transverse drainage trenches that connect both longitudinal drainage trenches in the drainage strips arranged below the seasonal freezing layer depth and filled with a disperse adsorbing material.

EFFECT: prolonged service life of an earth bed, higher stability and strength of an earth bed.

4 cl, 1 tbl, 2 dwg