If you are a small partner in Shanghai, you must have walked here; if you are a small partner outside, today you can harvest a bridge and a penny from here. Anyway, you must be worthwhile… Today, Ting Niu will take you to take one of the famous bridges in Shanghai-Shanghai Lupu Bridge, to feel the beauty of Shanghai bridge at night!

Total number of this text: 3300 words
Pictures: 18 photos
Estimated rough reading time: 9 minutes (excluding thinking time)

First of all, we can see that this bridge, which was built in 2003 and has a total length of about 3.8 kilometers, lies quietly on the Huangpu River during the day. It is thick and lonely… The main bridge of Lupu is a full-rigid half-through tied arch bridge. The diameter is set to 100+550+100=750 meters, which is the second longest steel arch bridge in the world today, and the world’s first large arch bridge that is completely connected by welding technology. The bridge body is beautifully curved, such as Changhong lying wave, The flying frame is above the Pujiang River.

In 2018, in order to welcome the Shanghai Import Expo, the Shanghai Municipal Government carried out large-scale upgrading and reconstruction of some key engineering projects. The landscape improvement of the Shanghai Lupu Bridge was carried out on this basis. The scope of the Lupu Bridge landscape improvement project mainly includes:
(1) The main bridge is 750 meters (including the main bridge arch, wind bracing, bridge belly, main bridge pier triangle area);
(2) 780 meters of Puxi approach bridge within the visual range of the riverside (including upstream and downstream approach bridge side facades);
(3) There are 920 meters of Pudong approach bridge (including upstream and downstream approach bridge side elevations) in three sections.

 

 

1. Lighting Technical Index
1. The main arch of the bridge (including the main arch extension)
2. Adopt cantilever lamp steel structure lamp pole bracket, the bracket extends 2.8 meters outside the main arch eaves, each type of lamp pole is installed with 2 types of lamps:
3. ①LED digital color-changing flood light (486 sets)
Color temperature: R+G+B+A;
Power: 150W;
Beam angle: 45°;
Input voltage: AC220V;
Control method: DMX12+RDM)
② Customized LED special effect rainbow flood light (486 sets)
Color temperature: RGB;
Power: 150W;
Beam angle: 30° electric focusing;
Input voltage: AC220V;
Control mode: DMX12+RDM).

It should be noted that if the usual light-on mode, only the LED digital color-change floodlights are turned on; in the festive mode and major holidays, the LED digital floodlights and the customized LED special effect rainbow lights are turned on at the same time to realize the “changhong lying wave” light Show performance.

 

 

2. Wind bracing parts
Using customized steel structure brackets, install high-power LED wall washer lights (396 sets) symmetrically on both sides of each wind brace:
Color temperature: RGBA;
Power: 54W;
Beam angle: 30°;
Input voltage: DC24V;
Control mode: DMX512+RDM).

3. Zipper parts
Adopt customized lamp post, install high-power LED flood light (56 sets) on the post
Color temperature: 4500K;
Power: 54W;
Beam angle: 10°*60°;
Input voltage: AC220V;
Control mode: DMX512+RDM
4. Side elevation of main bridge
Use customized lamp brackets, each set of brackets is equipped with 2 sets of LED digital color-changing flood lights (204 sets)
Color temperature: R+G+B+A;
Power: 150W;
Beam angle: 45°;
Input voltage: AC220V;
Control mode: DMX12+RDM

 

 

5. Column position of bridge pier in triangle area
Install 4 sets of LED spotlights (96 sets) symmetrically with a customized steel structure lamp bracket on the east and west sides of each pier column
Color temperature: A+A+A+W;
Power: 300W/150W;
Beam angle: 30°;
Input voltage: AC220V;
Control mode: DMX512+RDM

6. Reverse arch in the triangle area
Adopt cantilever lamp steel structure light pole bracket, the bracket extends 2.8 meters outside the arch of the eaves, and each set of LED poles (120 sets)
Color temperature: R+G+B+A;
Power: 150W;
Beam angle: 45°;
Input voltage: AC220V;
Control mode: DMX12+RDM

 

 

7, the abdomen of the bridge
(1) Install 10 laser projection lights respectively on the river embankment in Pudong and Puxi triangle area; (2) Symmetrically install LED high-power cut-off anti-glare projection lights (472 set)
Color temperature: R+G+B+W;
Power: 150W;
Beam angle: 30°;
Input voltage: AC220V;
Control mode: DMX512+RDM

8. Location of approach bridge in Puxi and Pudong
Install high-power LED wall washer (3402 sets) on both sides of the approach bridge (upstream and downstream)
Color temperature: RGBA;
Power: 54W;
Beam angle: 30°;
Input voltage: DC24V;
Control mode: DMX512+RDM

 

 

2. Energy-saving measures and effects

It is worth noting that all the lamps and lanterns of this bridge landscape improvement project are energy-saving, environmentally friendly and long-life LED lamps. The lamp control is the most advanced: DMX512+RDM system;

The brightness and chromaticity of the lamps and lanterns can be programmed and controlled according to different time periods of daily lighting; the system uses signal monitoring and feedback technology: the intelligent control system provides real-time data feedback and accurate management of each lamp in the system without loss of display. Greatly improve the management efficiency.

1. Reasonably choose the lighting method of night scene lighting

The construction of large-span bridges must be considered from the perspective of economy and advanced structure. The characteristics of such bridges are high and narrow, thin, lightweight, concise and beautiful. Night scene lighting should not use floodlights with a large area regardless of primary or secondary area, and project a lot of invalid light into the sky to cause light pollution.

The lighting needs to be targeted by a combination of extremely narrow-angle LED spotlight projection, close-range light control lighting, horizontally stretched planar lighting, wall washing lighting, and projection lighting. The focus is on highlighting, improving light efficiency and controlling glare. Preference is given to high-efficiency energy-saving light sources and high-efficiency lamps. For example, the 2000W metal halide lamp used in the original projection tower is planned to be replaced by a 600W 2.5-degree angle extremely narrow-angle LED spotlight. Energy consumption is only equivalent to 30% of the previous.

2. The efficiency of LED lamps is not less than 90%, and the power factor is not less than 90%

In addition to the above two points, during the upgrade of the Lupu Bridge, Lai Yiting is committed to the maximum working voltage drop of the main power line of the bridge should not be greater than 2%, and the maximum working voltage drop of the branch line should not be greater than 3%.

More importantly, the following four control modes are set: normal mode, holiday mode, major event mode and late night mode. Strictly control the opening time, brightness, range, switching frequency, etc., not only to establish a practical and effective energy-saving management mechanism. And harmonious with the surrounding landscape lighting.

 

 

 

3. Innovations in lighting design

For the abdomen of the bridge, laser projection with higher brightness and longer life is used. All lamps of the main bridge and the approach bridge adopt energy-saving, environmentally friendly and long-life LED lamps.

Lamp control system: DMX512+RDM main arch lamp bracket adopts a hinge structure that can rotate, which makes lamp maintenance more convenient and safe and reliable.

1. Technical improvement of lamp mounting bracket scheme

The largest part of the Lupu Bridge’s landscape improvement plan is the cantilevered floodlight and cantilevered rainbow light. For the convenience of installation, the reliable operation and the convenience of the owner’s management and maintenance, this part of the lamp support is optimized in the previous stage. A rotatable bracket is used for installation.

2. Advanced technology of lamps

(1) The choice of parameters: its light distribution, light efficiency, and service life must meet or exceed national standards.
(2) The choice of the lamp structure: light weight, small windward surface, waterproof lamp structure, and protection grade up to IP66.
(3) Electronic components adopt well-known brands, industrial grade, high stability and long service life.
(4) The shell material is made of high-purity aluminum, and the surface is anodized (or according to the body color of the Lupu Bridge). It has a strong sense of technology and can withstand the corrosion of the external environment.
(5) The bracket is tailored according to the actual situation on site, which is safe and reliable, and easy to disassemble.
(6) The internal system is equipped with voltage and current feedback control, overvoltage and overcurrent protection, short circuit and open circuit protection, LED open circuit detection, and is equipped with thermal sensor overheat protection to ensure the high reliability and stability of LED smart lamps;
(7) It has strong applicability to ambient temperature and can work continuously at an ambient temperature of minus 40 degrees to 60 degrees.
(8) The lens angle and the light emitting angle should be customized according to the different installation occasions of each location of the Lupu Bridge, and the light control mask should be appropriately configured.

 

 

3. Advanced control scheme

(1) DMX512+RDM system is adopted for the dynamic control system of night scene lighting fixtures. RDM is a two-way feedback control protocol for remote equipment: two-way data transmission (two-way feedback of control system and lamps), and can remotely detect the lamp status, change the lamp setting address code, channel mode adjustment, provide lamp equipment fault list report, etc., which is convenient for daily lamps. Maintenance, reduce maintenance costs.

(2) The LED dynamic control system is controlled in a unified and centralized manner, and the maximum number of points of each main (sub)control controller is reserved with 20% capacity. There are three kinds of light switch modes: normal mode, holiday mode, late night mode, and can preset to automatically play different dynamically changing programs.

(3) The plug-in connector and signal line of the control system transmission signal use general standard products. Avoid the phenomenon that the LED lamps are not controlled due to the quality of the LED signal line or signal connector.

Optimize and improve the construction method of the control system circuit. The connection method of all control system circuits adopts the factory-produced high-protection plug-in technology to prevent the occurrence of corrosion and oxidation on-site welding, and improve the reliability and stability of the control system signal transmission quality. Sex.

 

 

Project actual operation evaluation

The lighting design of the Lupu Bridge landscape improvement project was constructed on the basis of structural safety, implementation safety, and operation safety, which meets and meets the overall landscape effect of the Binjiang Through Project.
The project focuses on the main bridge landscape lighting including the main arch side and main bridge side landscape lighting, cable lighting, wind bracing lighting, bridge belly lighting, bridge name lighting and bridgehead interior lighting, as well as major holidays and major events on the main arch side and Performance lighting of the bridge belly. After the construction is completed, the overall appearance effect meets the requirements of the design assumption and design plan, and the quality is qualified after testing.

——From owner evaluation

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