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for operation of the LR 11350 which weighs about 1,200 tonnes. Specialists believe that this crawler brings a new dimension to this class of handling equipment. Because of the use of various boom confguratons, the LR 11350 ofers high fexibility in operaton with or without a derrick system.

The crane has a 66 meter long boom with a controllable 36 m long jib extension The Superlift system uses 200-ton and 320-ton counterweights.

Daniel Skeypens, Crane Installaton Supervisor, Sarens NW says “The unique lifting crane features a flexible boom configuration, short deployment tme, easy and economical relocaton, state-of-the art electronic control system, high reliability because of redundant safety systems, and, which is highly important, high job quality. “It is true that lifting the panels that weigh up to 375 tons to the elevaton of 70 meters within the tght space conditons of the site on the Russky Island is a challenging task. But it is also true that this state-of-the art machine offers a high lifting capacity in any confguraton.”

“This crane confguraton will allow us to lif and te up together large-size panels within a short tme under the tght space conditons on the bridge construction site on the Russky Island side,” says Nikolay Rogov, General Director, USK MOST. “Ten panels of the main steel stfening girder will be lifed from the span between the pillars M8 and M7 to the design elevaton, and installaton of a rig for the next work phase to be conducted from the water in the Eastern Bosphorus Strait will be done as well using this crane.”

For more informaton > > > Liebherr LR11350

operations were conducted from the water at sea for the frst tme in bridge building in Russia. A total of 120 bored piles, each two meters in diameter, have been put in place to build the footing of each pylon. The permanent metal casing piles were bored to a depth of up to 77 meters on the Nazimov peninsula. The rock is closer to the ground surface on the island side, so the piles of the M7 pylon footng are only 40 meter deep.

The botom part of the pylons takes up the maximum load. For that reason, the design provides for heavier reinforcement of the

botom part. Self-compactng B35 concrete mix based on sulphate-resistant Portland cement was placed in the pylon grillage. The concrete will protect the footng against corrosive fuids and prevent rebars from corroding.

The total footage of the boreholes drilled at the Russky Island bridge construction project is 17,159 meters. According to professionals, dri l l ing under the weather and geological conditons are so adverse that they have never been conducted anywhere in the entre world. The 17 kilometres of boreholes were drilled through highly complicated rocks in the Eastern Bosphorus Strait, and the boreholes that were 2 m in diameter were drilled to a depth of up to 77 meters.

The pylon grillage was concreted in three sections: 2 of 9,380 m³ and one of 1,095 m³. The 9,380 m³ sectons were concreted nonstop during 4.5 days with a concrete pouring rate of 110 to 165 m³ per hour. The operations were supported by 50 concrete mixers and 4 concrete mixing plants (two plants were mainland based and the two other plants were located on the Russky island).

The concrete mixers were delivered from

Photos by Igor Lischuk / SK MOST

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Heavy-duty sea-going cranes were used to transport the bridge sectons in to positon.

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