ERECTION METHOD OF COMBINED DRAINAGE EARTH STRUCTURES Russian patent published in 2016 - IPC E02B11/00 

FIELD: construction.

SUBSTANCE: invention relates to drainage devices and can be used for protection of low-pressure earth dams and dams banking from possible filtration deformations of soil and structures foundations. Method involves erection of combined drainage consisting of batter drainage 1 and horizontal draining 2, made from gabion matrasses 3 and flexible mattresses 4, connected to each other and made from dense rows of light fascines, perforated pipes and mesh shells. Batter drainage 1 is made from a stepwise stacked gabion mattresses 3 with drain devices and flexible reinforcing soil massifs meshes 8 of glass fibre materials. Gabion mattresses 3 is made of light fascines, perforated pipes and metal mesh, to mattrasses over the entire length are attached flexible reinforcing meshes 8 of glass fibre materials width in 3 times and more larger width mattresses. Flexible reinforcing fiberglass meshes 8 of gabion mattresses 3 stepwise cut in soil massif of downstream face by drainage height so, that the depth of cuttings reached further than depression curve line of filtration flow. Horizontal drainage 2 arranged in the base downstream slope to the output of the tail bay at its bottom, and is made of two layers of mattresses. First layer - water intake part 9 of flexible mattresses made of light fascines and geo mesh, is laid horizontally along the base of bottom slope and the bottom of the tail bay. From above of water intake part 9 is carried out the second drainage layer 2 of gabion mattresses 3, laid normally to rows of the first layer of water intake part 9 and towards outlet line of filtration flow. In bottom batter drainage 1 at the bottom and on top of the output end part of the horizontal drainage 2 arranged gravel or gravel-pebbly filling 11. Increases workability of construction and efficiency of the drainage device.

EFFECT: combined drainage can most effectively be used in difficult conditions in the rivers at their plains and foothill areas, where erected low-pressure earthing dams and dams of fine sand and clay soils.

1 cl, 5 dwg