SOIL DAM ON WATER-PERMEABLE FOUNDATION Russian patent published in 2009 - IPC E02B7/06 

FIELD: construction.

SUBSTANCE: invention is related to hydrotechnical construction of soil dams on water-permeable foundation. Soil dam on water-permeable foundation comprises draining part installed on water-permeable foundation on lower side from antifiltration device, foot of which is located on water-permeable foundation with creation of coupling in the form of contact of antifiltration device foot with water-permeable foundation. Dam comprises water-permeable web, which is located on water-permeable foundation on lower side from antifiltration device and is coupled with it. Water-permeable web has specified width in cross section and is made of geotextile material. Rated diametre of water-conducting (filtering) holes of water-permeable web is determined provided that at first transition layer is created directly upstream water-permeable web, within the limits of which pore space in filtering soil is mudded with non-cohesive soil according to reverse filter principle, and then antifiltration layer is created upstream this transition layer, within the limits of which pore space in filtering soil is mudded with non-cohesive soil. Rated diametre of water-conducting holes in water-permeable web satisfies condition where is maximum diametre of soil particles that may be moved by filtration flow to water-permeable web.

EFFECT: invention makes it possible to increase quality of soil dam antifiltration device coupling with water-permeable foundation.

2 dwg