Lakhta Center is a multifunctional complex in St. Petersburg with the Gazprom headquarter and public spaces occupying a third of the area. Construction was completed in October 2018, now start work on the arrangement of business and public areas. The opening will take place in about a year, when the complex will be fully prepared to meet guests.
Noiseless Technologies. "Floating Floors"
To reduce noise of ventilation and air conditioning equipment is used with a reduced noise level, noise suppressors, equipment is placed in isolated areas with sound-proof curtain walls including “floating floors”.
Floating floors are designated to suppress vibration during the operation of equipment. A “floating” floor is a floor installed on a sound-suppressing material layer which has no rigid connections with a floor slab, walls, utilities (heating and ventilation pipes) and other structures of the building.
A high degree of isolation of a floating floor from any vibrations and structural noise is achieved because of low frequency of system installation.
The installation process of the floor system with built-in spring elements is fairly easy. Vibration isolator bodies are installed on a foundation marked in accordance with load distribution and coated with a dividing film. To achieve a wall side seam foam polystyrene rods are installed as a formwork. Then a floating slab is reinforced and concreted.
After concrete is hardened pre-stressed string elements are installed in the bodies which are subsequently released. Owning to it the slab of a floating floor rises. The closing stage is to adjust a gap under the floating slab and level it, if necessary.
Noise is reduced by vibration isolation fans coupled with air ducts with flexible connectors.
Flexible connectors suppress vibration and designed to suppress mechanical oscillations and prevent from spreading vibration noise of individual elements of operation equipment (fans) through air ducts to an overall ventilation system as well as for partial compensation of thermal deformation in an air duct and are used in ventilation units transporting air within a range of temperatures between −40°С and +80°С. Flexible connectors provide a hermetic flexible joint which endures high pressure and abrasive-resistant. The body of a connector is from galvanized steel with a cloth band (neoprene, vinyl) in the middle providing the sealing of a duct. The construction of a connector makes it possible to couple it with the ventilation system elements as a flange, cleat or nipple joint.