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The new development is able to remain fluid for more than 6 hours and is intended for delivery without use of concrete mixing plants at long distances. According to the project, the navigational beacon foundations were embedded in concrete in the water area of the Gulf, 7 km off shore, where concrete was supplied on barge continuously, during 3 days for each beacon. It took the total of 450 cubic meters of concrete mixture that cost over RUB 2 million. The customer of work was Rosmorport (federal state-owned enterprise). The turkey contractor and project developer is GT Morstroy ZAO .
The beacons will serve as navigational landmark indicating the approach channel to the St. Petersburg marine passenger terminal that is being built on the Vassilievsky Island. The beacons had to be installed in the open water area of the gulf because it was impossible to build them on the opposite shore where the Peterhof quay is located. Similar projects are very rare, due to complexities with their implementation. For instance, there are just 10 leading beacons in the high sea in Russia.
According to Mr. Andrey Bibikov, Manager of Obiedinenie 45 OAO , «the complexity of work consisted in delivery of concrete without mixers across the sea for 2 hours. Moreover, the mixture should have remained fluid till arrival of the next consignment to ensure adhesion of the material. We were able to fulfill these requirements by applying special additives in concrete production. The mixture was selected together with the Vedeneev Institute during a month.»
The cost of the new development is by 15% higher than that of ordinary concrete. To carry out supplies, the contract was awarded to Obiedinenie 45 OAO in a tender held by GT Morstroy ZAO , before the start of construction. The four leading commodity concrete manufacturers from St. Petersburg participated in the tender. The key advantages of the winner became: precision equipment that enables to strictly comply with the required composition of the material in production and experience of participation in complex projects.
Navigational landmarks are located at 15 km off the Vassilievsky Island and 5 km off Peterhof. They are called leading beacons because they are placed along one straight line, showing directions to ships. The height of the back beacon is 33.5 meters over the sea level; that of the front beacon is 22.5 meters over the sea level. The piled foundations of the leading beacons go 38 meters down under water, including 31 meters into the land. A distance between beacons is 2 km. The light optical equipment of the leading beacons operates automatically, by turning on at sunset and by turning off at dawn. The power supply is autonomous, from batteries. The leading beacons are visible at a distance of 8-9 miles.
The structures represent a reinforced concrete grillage on a hydro-technical foundation out of 12 bent bored piles of 1,220 mm in diameter, 38.5 meters and 28.0 meters long, filled with monolith concrete. The foundations are designed to withstand wind with pulse and seismic impact of 9 on Richter scale. At first, the bored piles were hammered into the ground, then they were filled with concrete mixture, by applying consolidation by vibration using immersion vibrator. The total construction period is 3 months.
Obiedinenie 45 OAO (www.045.ru) is an enterprise of Russia's No.1 construction holding — LSR Group. The company manufactures concrete for all types of construction — housing, industrial, commercial, road construction — and it supplied its products to such facilities as the Ladoga Terminal, a complex of buildings of the Russian State Historic Archive, South-Western Treatment Facilities, The Hermitage repository, overhauling of Sadovaya Street and Engels Prospect, the interchange of Vantovy Bridge in the range of Obukhovskoy Oborony Prospect, dam construction (AFS), different sections of the St. Petersburg Highway etc.
LSR Group (www.lsrgroup.ru) was established in 1993. It is the major player in the Russian construction industry. The core lines of business for the Group are production of construction materials, real estate construction and development. The Group includes such industry leaders as Obiedinenie 45 OAO , Pobeda LSR ZAO , Barrikada Production Association, Vozrozhdenie Sankt Peterburga Construction Corporation OAO , Block DSK (House Building Factory) ZAO , Gatchinsky DSK ZAO , Rudas OAO , Granit Kuznechnoye OAO etc.
GT Morstroy ZAO has been operating on the market for design and construction of port facilities, site survey and engineering surveys. The company was established by specialists in design and construction — 23rd National Marine Design Institute of the Russian Defense Ministry and the Northern Fleet Construction Department. The line of business is as follows: design and construction of military marine bases in the CIS and non-CIS foreign countries, participation in all of the major projects of port facilities in the Russian Federation. By developing and expanding the range of provided services, GT Morstroy ZAO has gradually become one of the biggest industry companies in Russia.
The objectives of ROSMORPORT (federal state-owned unitary enterprise) include: sound operation of the facilities and technical systems of the port infrastructure, such as hydro-technical facilities, channels, water areas, navigational security systems, ice-breakers and auxiliary fleet and other facilities. It takes steps to implement federal targeted programs for marine transport development. Construction of new port infrastructure facilities and reconstruction, upgrading and refurbishment of the existing ones, including navigational security systems, is carried out taking into account international obligations of the Russian Federation. It expands the revenue base by comprehensive maintenance of ships in marine ports. It raises private investments into development of marine ports.
B. E. Vedeneev VNIIG OAO is the biggest scientific center in Russia for comprehensive research and development in order to substantiate design, construction and operation of hydro-technical and special facilities and equipment for hydro-, thermal and N-plants. The key objectives of research and technical developments performed by the institute: the Bureiskaya hydro power plant, the Ust Srednekamsky hydrosystem, the Boguchany hydro plant, the Irganay hydro plant, the Turukhanskaya hydro plant, the Zaramagskaya hydro plant, the Nizhny Novgorod hydro plant, the Narva hydro plant No. 13 of Lenenergo OAO, etc.
For more information and pictures please contact Yekaterina Kuzmina, PR Specialist at Obiedinenie 45, LSR Group, telefax: 071 (from St. Petersburg), +7 812 99-071-11 — for calls from Moscow and regions; mobile: +7 812 940-95-51, e-mail:firstname.lastname@example.org www.045.ru, www.lsrgroup.ru
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