CULVERT UNDER EMBANKMENT IN PERMAFROST SOILS AT PERIODICALLY OPERATING WATERWAY Russian patent published in 2009 - IPC E01F5/00 

FIELD: construction.

SUBSTANCE: culvert comprises culvert aqueduct made of metal corrugated sheets and coupled by means of cushion and race to foundation and embankment, and two perforated anti-aufeis pipes, which are installed in cushion one by one aside from culvert aqueduct and at the distance from it. Anti-aufeis pipes within the limits of embankment are perforated and equipped with water intake located upstream embankment in filtering water collector. Cushion and race are made of cohesionless soils, and at the bottom and at sides they are enclosed up to a certain level into common water impermeable membrane, and near bottom slope of embankment they are partitioned by diaphragm, made of filtering geotextile web and coupled with water permeable membrane, which is made of polymer film, enclosed in geotextile. Filtering water collector comprises filtering geotextile cloth, which covers on top water collector of anti-aufeis pipe. Near upper slope of embankment, cushion and race are partitioned with additional diaphragm made of filtering geotextile cloth and coupled with membrane, and cushion on top is coated with filtering geotextile cloth coupled with membrane. Size of openings in geotextile cloth provides in process of filtration through it at first for creation of transition layer in soil directly upstream geotextile cloth from cohesionless soil, and then creation of anti-filtration layer upstream transition layer from cohesionless layer.

EFFECT: preservation of permafrost soils in natural condition, prevention of aufeis in culvert aqueduct and its frozen swelling.

6 cl, 5 dwg