Sea outlet - discharge of stream water into the Gdańsk Bay, Sopot, Poland
Sea outlet - discharge of stream water into the Gdańsk Bay
The seaside town of Sopot, located on the southern shores of the Baltic Sea is one of Poland’s major tourist destinations. This health-spa and bathing resort town has attracted visitors ever since its first spa opened in the 16th century. Ever since then, the rich and famous have built their mansions in Sopot and still today the town has the highest property prices in Poland, apart from the capital Warsaw. Intense development is taking place on the waterfront, with new spa resorts and luxurious hotels being built. Like any other tourist destination, Sopot needs to invest in infrastructure to protect the environment.
There are eleven small streams in the Sopot area, which have a total length of 21 kilometres and incorporate seventeen ponds. Their estuary sections consist of concrete canals (Ø1000), which have their outlets on the beach. The existing storm water drainage system is connected to the streams flowing through the city. When it is raining, storm waters wash out waste and pollutants from the Sopot area and discharge them directly to the coastal zone, resulting in periodical failure to meet the standards for bathing water quality. Consequently, public swimming and recreational areas must temporarily be closed, which deteriorates the value and reputation of Sopot as a health and seaside resort.
Another major frustration is the flooding of streets and buildings located in the lower part of the city, due to the insufficient capacity of storm water interceptors and collecting pipes, and an inadequate number of retention tanks and reservoirs which could alleviate the storm water drainage system during flash storms.
A project to convey Sopot area stream waters further out in the Gdańsk Bay was initiated. It is yet another of the many environmentally friendly projects that have recently been carried out in Poland. Like other projects aiming to make local water and sewer systems compliant with strict EU standards, the success of this project also depended heavily upon the quality of the materials used, as well as the reduction of cost and construction time. The use of WehoPipe PE-HD pipes made it possible to fulfil all of the requirements.
Construction of a marine outfall is the first and most vital stage of a larger project called “Protection of Gdańsk Bay waters – construction and modernisation of the storm water drainage system in Sopot”. The project, which is worth 18 million euros and is 20% co-financed by the European Union’s Cohesion Fund and 80% by local funds, is mainly aimed at the protection of homes in the lower part of Sopot against flooding. Another goal is the improvement in water quality and clarity in the city’s public swimming and recreational areas.
Three separate collecting systems will be created for Sopot streams and three double-pipe discharge pipelines will be installed deep into Gdańsk Bay, 345 – 375 metres away from the outfalls located on the beach. In the first phase of the project, two outfall systems – conveying water from six streams – will be constructed, while the second phase – planned in the upcoming years – involves pipe systems for the remaining streams. Uponor Infra was chosen as the supplier of piping solutions for both outfall systems.
PE-HD WehoPipe (DN/OD 1600mm PN6 SDR26) pipes were used to build the discharge pipelines and WehoPipe pipes (DN/OD 1200 – 1600) were used to construct the land section of the pipeline. Uponor Infra also supplied a wide range of non-standard inspection chambers, sedimentation chambers and special fittings. The contract also obliged the company to provide welding machines and installation crew, who made most of the joints.
Having been manufactured in the Uponor Infra factory in Kleszczów near Bełchatów, the pipes were transported to the construction site in 15-metre segments, which were joined by butt welding on the Sopot beach. These several tens of metres long welded, ready-to-install segments were then moved to the construction site and lowered into trenches by pipe layers equipped with lifting slings. In the trenches, individual segments were connected with one another using flange joints.
The pipeline project also included inspection and sedimentation chambers, which were made – as prefabricated components – of pressure pipes with eccentric manhole risers (inspection chambers) or symmetrical ones with straight stubs (sedimentation chambers). They are equipped with hermetic polyethylene hatches of 800 mm in diameter, which are installed by means of flange joints secured with screws. The hatches were installed 80 cm below beach level.
The discharge pipelines – two of which are each 345 metres long and two 375-metre ones (DN/OD 1600 mm) were butt welded directly next to the river Martwa Wisła (Dead Vistula), 15 kilometres away from the construction site. The pipelines were then fitted with end closures, ballasted with reinforced concrete weights and towed by tugboats to Gdańsk Bay. The trenches had been dug in Gdańsk Bay and water was pumped into the pipelines in order to sink them. The last installation phase was under water and involved joining the pipelines with outlet chambers and receiving tanks, which connect outlets with the pipelines installed on the beach. In spite of periodically unfavourable weather conditions, the whole operation was smooth and easy. The first phase of the project was finished in December 2009, over a dozen or so months after the first work had begun.
Excellent properties of PE pipes
Polyethylene pipes are flexible, which makes them easily adaptable in various soil conditions and increases their resistance to vibrations, load and soil movement. Due to their low weight, PE pipes are easy and quick to install. They can be manufactured in considerably longer lengths than traditional pipes, which significantly shortens the installation time. What’s more, polyethylene pipes have superior chemical resistance and don’t corrode, which is a key factor when it comes to applications in salt water. Therefore, PE-HD pipes are the perfect solution for marine projects.
Municipality of the city of Sopot
Consortium of comapnies: Hydrobudowa S.A. Gdańsk/PRCIP Sp. z o.o. Gdańsk
Massiivinen jätevesiviemäri Harjavallasta Poriin
Porin ja Harjavallan välille valmistui massiivinen jätevesien siirtoviemäri.
Kestävyyttä ja laatua tieinfraan Uponor IQ-hulevesijärjestelmällä
Kuokkalaan avattiin marraskuussa 2013 kehäväylä. Väylälle asennettiin 2 kilometriä Uponorin IQ-hulevesiputkea, 250 kaivoa ja 5 kilometriä salaojaputkea.
Vesijohto mökkiläisille vesiosuukunnan turvin
Turvallista, nopeaa ja helppoa
Nyt on NOPEAA
Palojätevedet turvallisesti talteen
Hyvä on harjuksen hyppiä puhtaassa Ounasjoessa
Lämmitettävät putket takaavat sammutusveden
Euroopan suurin muovinen tierumpu Norjaan
Weholitesta ilmastussäiliö Iisalmeen
Kurikka sujuttaa vanhat viemärilinjat
Antaa sataa vaan
Puhdasta juomavettä 17 000 partiolaiselle
Uponorin uusin järjestelmä, Ultra Double, korvasi Raahen vanhan betoniputken
Ympäristöystävällistä lämmitystä ja vedenkäsittelyä Launosten päiväkodissa
Hulevedet ja epäpuhtaudet fiksusti haltuun
Varmuutta tunneleiden runkolinjoihin
Hulevedet haltuun helposti ja nopeasti
Kajaanissa sujuu, kun sujutetaan
Virtausmittaus paljastaa vesijohtoverkoston vuodot
Hybridiratkaisuja hulevesien hallintaan
Helppo ja luotettava hulevesiratkaisu
Suoraa hyötyä kaarista
Lahti Energia käyttää työmaillaan ensimmäisenä Suomessa kaariputkia. Kokemukset ovat olleet erittäin hyviä.
Lahden Vipusenkadulla uusittiin kaukolämpöverkkoa. Kaivantoon on laskettu isoja kahdentoista ja kuudentoista metrin DN 300 -putkia. Hitsaajat ovat ryhtymässä töihin. Jokin jää kuitenkin askarruttamaan ohikulkijan mieltä.
Samaan aikaan toisaalla, keskustasta Launeelle johtavalla kaukolämpölinjalla operoidaan hieman tuhdimpien DN 400 -putkien kanssa. Täälläkin sama juttu. Aivan kuin kaikki putket eivät olisi ihan suoria?
Iisalmen Vesi saneerasi runkolinjan sujuttamalla
Tuplasti varmuutta Pohjavesialueelle
Turvallinen juomavesiverkko entiselle teollisuusalueelle
Plastic ensures condensation-free ventilation at new hospital and research facility
Pump structure secures stormwater system’s long life
Drinking water passing through contaminated area in Thisted
Intake pipeline for seawater in Copenhagen Harbour
Butt welding by night of 900 mm pipes ensures stable operation of a district cooling solution in Copenhagen Harbour.
Weholite limits overflows and pollution in London
Weholite installed in Valdemarsvik Sweden
Uponor Vault cleans the storm water
Fighting against an ecological disaster in a world-record time
Rapid action was critical when a sewage collector broke in Warsaw, Poland, causing a massive waste spill into the Vistula River. Uponor Infra’s crew worked 24 hours a day in order to stop the pollution of the river. A temporary pipeline was produced, delivered and connected in just eight days.
Sewage pipelines to sewage treatment plant - HDD method
Collectors for sewage treatment plant
Renovation of reinforced concrete sewer - relining method
Sewage retention chanel
Renovation of cast iron water supply pipeline - swagelining
Thanks to swagelining technology, it was possible to carry out most of the water line modernisation works in the centre of the city of Łódź, in a built-up area, along traffic lanes with heavy traffic of motor vehicles and trams.
Sea outlet - discharge of stream water into the Gdańsk Bay part 2
Renovation of damaged stoneware collector – cracking/short relining
Sewage separation system
Construction of storm water collectors in Nowe Polkowice is one of the stages of a big investment concerning the drainage of the district.
Sea outlet of treated wastewater
A sea outlet of treated wastewater was initiated in Swarzewo. It is yet another of the many environmentally friendly projects that have recently been carried out in Poland where PE pipes were used.
Uponor pressure pipe system Profuse in Borås town
Uponor Infra culverts in major investment at Skåne University Hospital in Malmö
A test installation of an infra culvert with great potential
Strong, Safe and Flexible
Innovative, reliable - and installed in 11 days
Uponor soil drainage system Ultra Rib 2 in Kungälv
Infratunnel protects pipes and cables in new residential area
Focus on sustainability
Flow measurement reveals leaks in the water supply network
Quick installation in the Konotopa channel
Weholite tanks have multiple uses
Water supply in very demanding terrain in Norway
A smart retention system for an anti-flooding solution
September 2018 saw the launch of the project for a stormwater drainage system in Rzeszów, almost 26 kilometres long, in the residential District of Budziwój, which partially coincides with the floodplain of the River Wisłok. One of the elements of this system is the retention canal. The project, scheduled for delivery by May 2020, will help to finally solve flooding problems which have been plaguing the residents of this region of Poland.