1 Overview Figure 1 Concept of Beijing South Railway Station The design of the landscape lighting of Beijing South Railway Station is based on the characteristics and functional requirements of the whole building. From the overall nightscape planning and layout of Beijing, the characteristics of the building are fully displayed, highlighting the main body of the building and forming the iconic landscape of the city. The most important task of landscape lighting design is to modify and beautify buildings according to people's visual needs, with the ingenious movement of light and shadow, to create a beautiful and comfortable visual environment for people, and finally form a complete architectural image. Its design follows the following main principles.
Beijing South Railway Station is located in the south of Dongbinhe Road, You'anmen, South Second Ring Road, north of South Third Ring Road, west of Majiapu East Road, east of Majiapu West Road, southwest corner of Chongwen District and Right of Fengtai District. The junction of the gate area. Above the ground, it consists of a main station building, a canopy, an independent comprehensive building on both sides of the north and south, and a viaduct. The rain canopy on both sides forms a cascading structure with the main station building. The building area of ​​the station building is 226 333 m2. Beijing South Railway Station is a large-scale comprehensive transportation hub integrating national iron, intercity railway, urban rail transit, public transportation and rental.
2 Design principles
As a large-scale comprehensive transportation hub, Beijing South Railway Station is influenced by regional culture and surrounding construction conditions. The overall concept of station design is derived from the preservation of elliptical form and the extension of the concept of the Temple of Heaven. In the design of Beijing South Railway Station, the circular plane of the triple raft is applied to the plane of the ellipse. The highest eaves are transformed into curved roofs. The canopy of the two wings of the station can be formed by the changes of the two eaves. The concept of Beijing South Railway Station is shown in Figure 1. 
(1) The overall style should be compatible with the function and environment of the railway station building, embodying the grand momentum and the characteristics of the capital cultural center and transportation hub.
(2) The color tone should be based on plainness, local color enhancement, and rendering the overall effect.
(3) Coordinate with the architectural form and form an organic combination with the building.
(4) The levels are distinct, the points, lines and faces are combined, and the songs and straights are combined, and the color temperature and the architectural style are matched with each other.
(5) Set the necessary scene mode to fully consider the viewing effect at each viewing position.
(6) It is necessary to meet the requirements of high efficiency, energy saving and environmental protection, while ensuring the service life of the lamp, the reliability of the effect conversion and ensuring the stable operation of the lighting system, and controlling the investment within the predetermined range.
3 lamps, light source selection and effects
The design of landscape lighting in Beijing South Station mainly focuses on the central skylight, roof triple raft and stacking level as the key performance parts, and expresses the streamlined feeling of the viaduct; the peripheral cornice is the focus of horizontal vision and is also focused on. The range and position of floodlighting, contour lighting, and internal light transmission are reasonably determined during design, focusing on the ground viewing effect, taking into account the aerial overhead effect.
Ground effect: fully embody the architectural appearance characteristics of the combination of steel structure and large-area glass curtain wall, reflecting the metal texture of steel and the transparent texture of glass; the key parts create the facade effect, and the landscape design is partially based on the nature of the building, and the lighting and lighting are achieved. The architectural form here has the same effect, while paying attention to the local effect and the overall effect.
Aerial overhead effect: The whole building is mainly made up of light inside, supplemented by LED light strips and floodlighting means to make the whole body bright, and finally should form a point, line, surface exquisite and transparent and very impactful visual effect. According to the requirements of the landscape lighting scheme, the location where the luminaire needs to be installed is selected, and then the lamp position in the actual situation can be determined according to the plan of each floor, the elevation plan, the canopy node of the canopy, the node of the central roof, and the large sample of the viaduct node. Implementability.
3.1 Central skylight
Under normal circumstances, the internal light transmission effect of the central skylight is mainly realized by the external light generated by indoor lighting. However, considering that during the low-end operation period, the actual use may turn off most of the indoor lighting, thus losing the natural light transmission effect. To this end, 1ç›1 800W of gold halide 138 lights were installed on the inclined columns on both sides of the central waiting hall. According to the light distribution curve of the luminaire, the light projection angle of the luminaire can be adjusted twice according to the actual situation. In order to ensure the anti-glare requirements of the lamps, professional anti-glare devices are installed on the reflectors of the lamps to ensure the light efficiency and longevity. When the light is thrown into the central skylight, the indoor space has a feeling of rising and high at night, and the effect of the overflowing and atmospheric atmosphere is formed outward.
From the actual use effect after the operation, only turning on the up-lighting can meet the needs of the landscape, and can also take into account the basic needs of indoor lighting, which is very conducive to energy saving.
3.2 Roofing
The landscape lighting of the roof uses the prominent edge of the triple crepe contour on the roof, and the LED point light source is installed. The power of the single lamp is 5W, the spacing is 015m, and the point effect is outlined to form a bead of light and highlight the outer contour. A 70-150W metal halide floodlight is installed in the lower part of the three-layer concrete with a spacing of 4 m. The lines formed by the contoured beads are used to create a three-layered curved surface.
The 70W small metal halide floodlight is used, and each set of two lamps is one set, which is installed according to the steel beam structure interval of about 7-8 m. The floodlights illuminate the inner upper side, illuminating the outer structure of the canopy and the louver details, thus shaping the grand and smooth effect of the station on the pedestrian's point of view. 313 The facade has a viaduct or a yard on the east and west sides, and the ground viewing effect is limited. Therefore, only the integrated building and the north-south entrance are used as the main façade. The 150W metal halide buried light is used to illuminate the façade along the ground. The interior and exterior of the façade are combined to highlight the key points and the nighttime image is more abundant.