The construction project allows to solve next problems:
reduce the level of groundwater in the most flooded part of the city;
- improve the reliability of urban drainage systems, water supply, electricity, communications, and improve the conditions of their operation;
- more efficient use of surface water and groundwater by increasing the amount of water suitable for irrigation.
THE VOLUME OF CONSTRUCTION:
- The total length of the tunnels – 31 520 m
- Drainage and communication tunnel with a diameter of 6 m – 17 700 m
- Two waste tunnels with diameter 3.5 m – 13 820 m
- Technological chamber The length of the “wall in the ground 24 pcs – 2 500 m
- Radial shaft wells – 76 pcs
- Radial drains-length – 32 000 m
- The total amount of concrete – 336 000 m³
Construction of drainage and communication tunnel is carried out in an area of high seismicity (up to 10 points on the Richter scale) with mining complexes with EPB produced by “Herrenknecht” AG.
Construction of process chambers with the slurry wall method is carried out by excavator -Casagrande». Trenchless technologies are conducted by Horizontal directional drilling (HDD) with rig -Robbins. Pipe filters of polymeric materials, that are resistant to corrosion, are installed into drains of 200 mm diameter
The project involves gravity-flow connection of untreated urban waste water to the sewer tunnel compartment and its gravity flow to the treatment plant.The drainage water is collected in radial drainage wells and with gravity flow sewerage flows to the process chamber.