COMBINED DRAINAGE OF EARTHWORKS Russian patent published in 2017 - IPC E02B11/00 E02B3/12 

FIELD: construction.

SUBSTANCE: combined drainage containing two types of drains, consisting of interconnected flexible and gabion mattresses made of dense rows of light fascines, perforated pipes and lattice shells. One of these types - the batter drainage 1 is arranged in staggered stacked gabion mattresses 3 with drainage devices and flexible meshes 8 of fiberglass materials reinforcing the ground mass. Gabion mattresses 3 are made of light fascines and perforated pipes, which are laid in alternating rows into gabion mesh shell to which along the base 3 of the mattresses and throughout their length the flexible reinforcing meshes 8 of fiberglass material are attached. The flexible reinforcing fiberglass meshes 8 of gabion mattresses 3 in step manner are cut into the soil mass of lower slope at the altitude of drainage to form reinforced ground structure. The second kind of drainage - horizontal 2 - is arranged at the base of the lower slope with access to the downstream along its bottom and is made of two layers of mattresses, the first layer - water intake part 9 of flexible mattresses 4, laid horizontally along the base of the lower slope and the bottom of the downstream, and the second layer of gabion mattresses 3 is laid above rows of the first layer of flexible mattresses 4 along the normal line to it and along the seepage output line. At the foot of batter drainage 1 at the bottom and on top of the output end of the horizontal drainage 2 the stone backfill 11 is arranged. the combined drainage can be most effectively used in critical conditions of rivers of plains and foothill areas, where low pressure earthen dams and dikes of fine sand and clay soils are erected.

EFFECT: improved operating efficiency of the drainage device.

5 dwg