Foreword <br> Kunshan Qianjin West Road is an important trunk road that expands to the west of the city. It extends from the city center to the outer ring road of the city. It is designed as a two-way six-lane road with a width of 60 meters. The Weihe River flowing through the city is an important waterway for shipping. Intersecting with the westward direction of the road, the Yufeng Bridge is the bridge that crosses the Weihe River on the westward road.
Building <br> Yufeng Bridge adopts a new type of thrust-free reclining arch bridge with a total length of about 330 meters, of which the main span is 110 meters and the height is about 27 meters. The span is the highest of the same type of bridge in the world. The design of the Yufeng Bridge breaks through the traditional bridges simply crossing the river and purely structural mechanics calculations. More is from an aesthetic point of view and an artistic point of view. The architectural design concept of Yufeng Bridge is “open Kunshanâ€. The shape of the bridge is dominated by the word "K". Double K-shaped main, oblique arch; K-shaped beam bottom arch ring, and so on.
Elevation plan
Landscape <br> The bridge is a special space with a small horizontal, deep and wide, and rich layers. Or stop or go, the scenery changes; people flow, traffic, ships, water, natural scenery on both sides of the river, the form of the structure, together form the special environment and space of the bridge, constitute the imagination of spatial transformation processing.
The bridge landscape is a scientific, systematic and standardized design and research on the special environment and space of the bridge; the design and research results are applied to the actual project, making it more integrated with the surrounding environment to become a new landmark and landscape. building.
The landscape design of Yufeng Bridge is detailed and comprehensive planning for the surrounding environment of the bridge, bridge color scheme, painting process, protective railing, ground paving, utilization of the space under the bridge and greening. Road lighting, ground paving Construction drawings and construction work for projects such as loading and railing
Lighting <br> Lighting refers to functional lighting and landscape lighting. Functional lighting is necessary to meet the needs of the vehicle for pedestrian safety. Landscape lighting is an important component of landscape design. The lighting design of Yufeng Bridge not only pays attention to the functionality of lighting, but also pays more attention to the cultural, professional, permanent, maintenance and energy-saving aspects of lighting.
First, traffic lighting <br> Traffic lighting is a functional lighting, is no longer simply to illuminate the road surface, to meet the norms and indicators of road traffic, but should be combined with the building, pay attention to the overall landscape planning of the building. The traffic lighting of Yufeng Bridge is divided into three parts: motor vehicle road, non-motor vehicle lane and sidewalk lighting. Lighting focuses on the needs of the building structure and landscape, the combination of road lighting and safety facilities, and organic integration of the two. For example, the main bridge traffic lighting, if the traditional pole lighting is used, the spatial relationship between the main arch and the inclined arch, the main arch and the main arch is interrupted, the natural connection is split, and the landscape nature is impossible to talk about. We choose linear spotlights on the motorway, the light source uses T5 fluorescent tube, the color temperature is 4200K; the non-motor vehicle lane uses the buried wall lamp, which is placed in the isolation pier, the light source is energy-saving lamp; the sidewalk lighting is to hide the fluorescent lamp in the pedestrian guardrail Inside, the white light of the main bridge and the yellow light of the high-pressure sodium lamp of the approach bridge have significant visual effects, and the main bridge has outstanding status.
Second, landscape lighting <br> Landscape lighting is not to light the building as bright as possible, but according to the architectural characteristics of the building, with the appropriate brightness of the appropriate combination of light and shadow to express the theme of culture. The Yuqiao Bridge "double K" shaped arch bridge is like a huge shell lying on the blue waves. The slings of the arch bridge are like the ridges of the shell. Therefore, the concept of landscape lighting is the theme of “Silver Bayâ€, which fully demonstrates the modeling characteristics of the bridge.
In line with the theme of “Silver Shellâ€, the anti-corrosion coating of the bridge is silver-white; the protective railing adopts the shape of an arc and matt stainless steel; the streetlight of the approach bridge also adopts a curved pole.
The main objects of landscape lighting are the main arch, the inclined arch, the boom, the cross beam, the under arch of the bridge and the bridge outline. The luminaire is selected from floodlights, floodlights, and fluorescent lamps depending on the shape, height, installation position, and intention of expression of the object to be illuminated. For example, the Yufeng Bridge boom lighting fixtures use GE's Beam Trimmer low-power floodlights. It is because the number of booms is large, the diameter is thin, the length is too long, the light receiving surface is narrow and narrow, and the light distribution curve and power configuration of the illumination lamps are high, and the consistency of light color is high. GE's luminaires meet these requirements. Each boom uses a set of spotlights, the power configuration is from 35W to 150W, and the light source is equipped with a single-ended ceramic metal halide lamp, which ensures the light color consistency of the entire boom and achieves the expected effect. From the perspective of energy saving, the Kunshan Tongfeng Bridge, which is also an arch bridge, uses three sets of 400W~1000W floodlights for each boom lighting, while the Yufeng Bridge uses only one set of 35W~150W lamps. The power is only 2.9% to 5%. Energy conservation is self-evident. For example, the outer edge of the main bridge is a circular arc surrounded by a stainless steel plate, and the ribs form a square space, illuminated with a 70W high-pressure sodium lamp, projected onto the water surface, creating a beautiful golden reflection, emphasizing light and dark. The change in level has created a more peaceful night scene.
The design life of the bridge has exceeded seventy years. Although the current lighting scheme may not be used for a long time, in the current lighting scheme, some holes will be opened on the bridge; some components are welded and pre-embedded to ensure the lamps. Installation and maintenance, cable laying. These components will remain permanently on the bridge and become part of the bridge. In the landscape, these components and holes are required to be relatively concealed and beautiful, and do not affect the daytime landscape effect. On the other hand, the location, installation, anti-corrosion methods of these components need to be recognized by the architects, and also reflect the professionalism and extensiveness of lighting.
If the equipment is inevitably damaged during operation and the light source is damaged, maintenance personnel are required to perform maintenance. For those luminaires installed in the project, especially bridges, maintenance access is even more essential. There should be a quick and easy access to maintenance personnel and safety during the repair process. For example, we installed waterproof and dustproof fluorescent lamps on the main and inclined arches of the bridge to outline the arch bridge. On the arch we welded the ladder, which not only provided access to the service, but also became the platform for the installation of the lamps. From the perspective of anti-corrosion, the ladder is made of stainless steel carbon steel composite pipe.
Conclusion:
The location of the building in the city determines its landscape status. The Yufeng Bridge, woven with nature, buildings, clear water and light, pays attention to lines, colors and brightness, and its lighting is meticulous, exquisite, bright and comfortable. It has become a familiar part of people's urban life and naturally integrates into the urban environment. People can see it from different angles and heights in the nearby buildings - the beautiful arch ring, the white approach bridge, the golden main beam, the bridge line, such as the crystal clear beads, embedded in the Weihe River. The stretch of the curve and the simplicity of the line make you marvel at the connotation and richness of it. Stop on the bridge, your sight is full of dazzling shadows. The linear lights on the anti-collision piers, the wall lights on the non-motorized roads, and the fluorescent lights in the curved railings all attract you with their unique charm. The big stage where the light and shadow show vividness has captured your gaze.
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