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Vietnam - A better bridge for a better life


Located in North Vietnam, Haiphong is the third largest city of Vietnam counting over 2 million people. At the end of January, in a pleasant spring atmosphere, a new flyover at the intersection of Le Hong Phong and Nguyen Binh Khiem Street was inaugurated, after only 7 months from the beginning of its construction, with an official ceremony attended by all the most important local authorities. 
 
Meeting the most demanding engineering as well as aesthetical expectations, this work sets an accent on the most advanced urban architecture, adding value to the innovation and development process currently pervading the city. Aimed at constantly improving people’s life conditions within this huge metropolitan area, the project was successfully completed according to the planned schedule, while respecting the quality assurance requirements and expressing the utmost determination of the local authorities to implement an array of projects improving the transportation net in the province of Haiphong.
 
THE FLYOVER
The flyover has been erected in just 7 months in order to reduce the superfast and dangerous traffic causing frequent jams on the so-called roundabout of death. The intersection between Le Hong Phong and Nguyen Binh Khiem Street collects a high density traffic, mainly involving container vehicles, trucks from and to the seaport, as well as the everyday urban traffic. Due to the fast growing level of congestion, the frequent accidents convinced the appointed authorities to solve the problem implementing a flyover on what are considered the most beautiful roads in Hai Phong.
 
The 267,6m long structural steel arch bridge with one nearly 100m long span is based on 2 conjugated concrete pillars which sustain 4 motor lanes for a total width of 16m, including lane separators and safety passages. Inspired by the Fehmarnsun Bridge’s design (Germany), the upper part of Le Hong Phong bridge is fitted with a cable-stayed structure, carried out by leading experts from Japan. Two large steel arches, which converge at their top and are connected by a series of parallel steel tubes of different lenghts, support a network of oblique, pre-stressed cables building a diamond shaped pattern. With their functional and at the same time decorative purpose, these crossed cables deliver a totally new appearance to this road intersection. Green lawns, multi-flower fields and flowerbeds have also been settled close to the bridge to create a beautiful, relaxing space, at least for the eyes, in a hectic urban area that otherwise could have offered only the sky above to look at.
 
THE LIGHTING SCHEME
Conceived and fulfilled by PhuThanh JSC, leading company in the installation of LED technology in Vietnam, the lighting scheme of the bridge is concentrated on the central part of the bridge where the complex structure stands out in its full essence. In order to enhance the different parts of the bridge, lighting fixtures with different light emission and power were required according to the scheme arranged by the appointed lighting designers of PhuThanh. The steel arches needed powerful, long-throw luminaires to be full lit up. To To do so, Powershine MK2 D RGBW units have been hung on sturdy metal supports located at the base of the arches in order to light up the external part of the structure. The single bank version, Powershine MK2 S RGBW, was used to enlighten the internal part of the cable-stayed structure, delivering a tridimensional perspective to the entire bridge at night. Moreover, owing to their compact, easy-to-install body, Jade 9 RGB units were fixed on the upper part of the bridge with the help of special fixing brackets to enhance the steel tubes which connect the two arches. Last but not least, 64 Dune MK2 in RGBW colour configuration have been embedded all around the basement of the piers, which support the bridge span, to enhance their shape in lively, bright colours. 
 
The beautiful dynanamic colour changing effect, which enliven the whole structure at night, delivers a new consistency to the bridge, already become a symbol of innovation and progress for the city and of cheering atmosphere for the citizens. 
DUNE MK2 RGBW is a highly performing LED colour changer specifically designed for exterior recessed applications.  Newly restyled, DUNE MK2 RGBW is now based on a combination of RGBW LEDs offering an unprecedented astonishing white light output quality as well as a wider variety of intermediate colour hues for an even broader range of application purposes. Narrow aperture spot lenses and wide elliptical distribution are part of the optional selection of optics groups available. A 2000 Kg deadweight load capacity makes this IP67 rated colour changer suitable for ground mounting applications even in vehicled areas. This versatile fixture also allows beam positioning through 10° moving capability. 
 
Credits:
Design and installation: PhuThanh JSC- Hanoi
Pictures: PhuThanh JSC- Hanoi 

Products installed:
48x Dune MK2 RGBW with medium optics
16x Dune MK2 RGBW with wide optics
20x Jade 9 RGB Narrow
4x Powershine MK2 D narrow
4x Powershine MK2 S medium
12x Antiglare for Powershine 
 

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