DOUBLE-TRACK SUBWAY LINE WITH DEWATERING UNIT Russian patent published in 2021 - IPC E02D29/55 

FIELD: tunnel construction.

SUBSTANCE: invention relates to tunnel construction of the subway, and more specifically to the arrangement of a drainage system in double-track subway tunnels. A double-track subway line with a drainage installation consists of a lining of a running tunnel and two track tracks for the movement of subway trains in different directions and contains a drainage system, while drainage trays are located under the rail tracks. The drainage unit is located in the construction volume of the lining of the distillation tunnel in the base body under the rail tracks and occupies an intertrack position. The drainage unit is located at a lowered point of the running tunnel of the metro line in accordance with the profile of the route between two metro stations, the rail tracks are separated from the drainage unit by a reinforced concrete slab, through which drain channels pass at an angle, connecting the drainage trays under the rail tracks with the drainage unit. The drainage plant is equipped with submersible pumping equipment containing submersible pumps with shut-off and control valves to remove water from the distillation tunnel through pressure pipelines to the city drainage network.

EFFECT: decrease in the volume of earthworks and concrete works, as well as an increase in the speed of construction of double-track metro lines and the reliability of the drainage system in dense urban areas and difficult engineering-geological conditions of construction during the construction of double-track tunnels.

1 cl, 1 dwg