In September 2011, the Novosibirsk MUP "Gorvodokanal" plans to launch a third sewer culvert across the river Ob. The capital city of Siberia is one of the most important sites of the city municipal infrastructure. Moreover, the object is unique. The other day in the alignment of streets and Saratov Zaobskaya began mounting thread pipeline.
Bottom pipe — this conduit equipped with pumps, designed for the obstacle (river channel, deep lake, ravine or railroad). The project is part of the investment program Gorvodocanal "The development of water and wastewater systems" for 2007-2012. The cost of the facility — about 443 million rubles. Funding is provided by the credit granted to the municipal enterprise Siberian Bank of Sberbank of the Russian Federation.
It is planned that in September 2011, the city will have an underwater pipeline with a diameter of 1.4 meters and a length of — 1.25 km (including 1,029 meters — part of the river bed, 217 m — shore). It will be the longest dyukerny transition in Russia, it will connect the right and left banks of the Ob River near Dimitrov Bridge (one of the two road bridges in Novosibirsk). Culvert construction began in April last year in the north-western part of Novosibirsk, and in March of this year, a trench at the bottom of the river, which will be laid pipeline was ready. According to the Director of MUP "Gorvodokanal" Yuri Pohila, during this week specialists general contractor — LLC "Sibpodvodstroyservis" — will mount the whip line: three river bed mounted with reinforced concrete prigruzami is being towed into place underwater pipeline laying. Then they are connected to the flanges and shipped in a trench.
How to tell the experts at the workshop, pipe sections joined in a special area, located 14 km downstream, with the use of computerized welding equipment. The prepared suspended span (the largest — more than 350 m in length) mounted with reinforced concrete prigruzami towed down the river to the place of installation. Depth of the culvert will be 6-11 meters below the water surface. Installation work will be carried out under strict control with the assistance of Finland and St. Petersburg.
"This matter has unique — said the mayor of Novosibirsk Vladimir Gorodetsky. — For the first time in the Russian practice of pipe diameter 1400 mm will be used as the main sewer pipe, it is made by the Finnish Technology from high-grade polyethylene PE100. During the construction of the trench at the bottom of Obi Contractors applied engineering solutions, as they had to pass section of rock. " Indeed, Russia has traditionally been used in steel pipelines are subject to corrosion. The project, developed by JSC "Sibgiprokommunvodokanal" used pipes made in Finland — because of their reliability and durability (service life of such materials is not less than 50 years). A feature of this object is also its high ecological safety manifested itself even in the sinking underwater trench through high-rocks on the river bottom. Typically used drilling and blasting technology, but in this case applied the new technology development of underwater trenches hydraulic hammer, eliminating damage to fisheries. Laying lashes will be made at low water level.
The new culvert across the Ob River was designed and engineered to eliminate potential accident on the existing siphon. He Gorvodokanal operated since 1972 in the trenches at the bottom of the river laid two steel "thread" with a diameter of 1200 mm each. The pipeline carries a pass to Gorvodocanal sewage treatment plant sewage main part of the right bank of Novosibirsk, including the distant Soviet district with its famous Akademgorodok, and the town of Berd and Koltsovo skip, etc. The volume of waste — about 300 thousand cubic meters per day. Construction of the third line will increase the capacity of the sewerage system Berdsk-Akademgorodok, Novosibirsk (in addition to 270 thousand cubic meters per day) and to increase the reliability of the sewer system of the city. That, in turn, will provide the opportunity to actively develop the promising areas of urban sprawl. After the commissioning of the new pipe two lines of the existing culvert will be alternately switched off for major repairs, which will prevent contamination of the Ob sewage.