Planning and Design of Night Lighting for Guanyinqiao Commercial Circle in Chongqing

I. Project background
Guanyinqiao Business Circle is located in Jiangbei District of Chongqing City and is one of the top ten famous commercial streets in China. In the overall planning orientation of Chongqing, Guanyinqiao Business Circle is positioned as “Chongqing Business Card, Urban Living Room, Civic Paradise, Consumer Paradise”. The business district landscape and building carrier are good, but its night scenes have always been in disorder and chaos. The plan is to re-plan and control the lighting of the key buildings in the business district, so that it can present an overall picture with appropriate brightness and quietness. The planning scope includes the detailed planning of night lighting in the business circle (including lamp recommendations and construction drawings) and the design of night lighting construction drawings for five key buildings such as CITIC Building and Future International.

Second, planning and design ideas
The image of the night illumination of the Guanyinqiao shopping district in Jiangbei, Chongqing is positioned as an eco-city park business circle with the theme of “ecological and cultural business circles”, focusing on reflecting the characteristics of ecology, culture and modern high technology, and striving to create a business circle. The commercial atmosphere, the green ecology of the business district park and the urban night scene form of the Bayu culture make it a true Chongqing business card.

Third, planning and design features
The planning is based on road lighting, with Guanyinqiao Square and surrounding architectural lighting as the core. The future international landmarks and key high-rise buildings are the highlights, decorated with squares and landscape green lighting, and the residential lighting is the background. The image of nightscape lighting with outstanding characteristics and vivid image; combined with the current situation of the layout of the Guanyinqiao commercial circle in Jiangbei, the framework of “One Heart, Two Parks, Three Streets and Five Nodes” was extracted for planning and design. According to the requirements of "Chongqing City Night Lighting Technical Specifications", the urban night lighting planning and design is carried out by vertical stratification, horizontal zoning, brightness grading, light classification and management central control.

1. The illumination of each carrier in the stratified business circle is roughly divided into four levels in the urban form:
(1) The lighting of roads, greening and public facilities constitutes the "bottom" of the night scene of the business district;
(2) The lower part of the street building is illuminated by the shop lighting and the store advertising lighting, forming a bright line of the business circle;
(3) Landmark lighting of landmark buildings is the transitional lighting of the bottom and top lighting of the building in the night scene, which plays an important role in connection. Its brightness and chroma are slightly lower than the bottom and top of the building;
(4) The top lighting of landmark buildings is the most prominent part of the city's night scenes. The plan is to outline the city skyline and highlight the characteristics of the night scene.

2. Planar zoning According to the characteristics of the Jiangbei business district and the different functions of each region, the important night scene nodes within the planning scope are summarized, divided into 6 nodes, and the role of each node in the urban night scene is carried out. Explain, the recommended lighting scheme is given for reference in the implementation.

3. Brightness classification The planned brightness is divided into four relative levels, with a maximum of 4 and a minimum of 1. The absolute value of the corresponding brightness (maintenance value) of the brightness level 4 is 25 cd/m2, and the absolute values ​​of the brightness corresponding to the 3rd, 2nd, and 1st levels are 15cd/m2, 10cd/m2, and 5cd/m2, respectively. The brightness control value refers to the limit value of the highest brightness of all buildings in this brightness area). Compared with the national standards being developed, we have added one level, namely level 3, which is more in line with the actual situation of foggy and high background brightness in Chongqing.

4. Classification by light In this lighting plan, according to the characteristics of urban carriers and strict environmental protection and energy conservation requirements, different types and types of buildings/structures are classified by light.
The light color of the plan is mainly yellow and white. There are only a few buildings on the building. According to the inherent color of the building, a light blue color is used locally. Except for the dynamic images of the four most important landmarks in the future, such as International and CITIC, the rest of the architectural lighting is static to highlight the key points and avoid excessive visual noise.