The project belongs to the field of civil engineering. Rail transit is the lifeblood of Shanghai's public transportation system. With the rapid development of urban infrastructure, the urban ecological environment has also been affected that cannot be ignored. The development of economy and society and the improvement of people's living standards have put forward higher requirements for the design, construction and operation of rail transit projects. The project team cooperated in various parties to carry out in-depth, long-term and systematic research and solved a series of key technical problems in the design, construction, operation and maintenance of rail transit projects. The results were successfully applied to major projects such as Shanghai Rail Transit Line 17. This project has achieved key scientific and technological innovation results in the following four aspects: 1.& amp;ldquo; Large space, large landscape, large visionrdquo; Station design theory. For the first time, ldquo; large space, large landscape, and large vision rdquo; station design ideas and theories were proposed, and innovative design ideas such as no columns, large spans, atrium, large skylight, integration of building and environment, and minimum energy principles were established to form a station hall and platform. The large space and large vision of the station hall, platform and environmental landscape are integrated, overcoming the traditional design problems of many columns, small connected space, low fire evacuation efficiency, narrow vision, and separation of building and environment. The results were successfully applied to Zhuguang Road Station of Shanghai Rail Transit Line 17 and obtained LEED Silver Certification, filling a gap in Asia. The pillar-free width of the station hall has increased to nearly 20 meters, an increase of 219.6%, and the station hall can reach 95 meters longitudinally, forming a large connected space. 2. Green ecological parking lot construction technology. It is proposed to use plant planting and large-volume water as key elements to build an ecological parking lot design method, and use the natural rainwater purification system to pioneer the natural maintenance system technology of water ecology, which improves the quality of the ecological environment and solves the problem of poor ecological environment in traditional parking lots. When the results were applied to the Zhujiajiao Parking Lot on Line 17, the air quality was significantly improved, PM2.5 was reduced by 10-15%, and the ambient temperature was reduced by an average of 4.5 ° C. The water quality after purification by rainwater meets the national first-class water quality standard. 3. Construction technology for rail transit smart stations. The concept of ldquo; smart stationrdquo; was proposed for the first time, and intelligent station equipment was developed to improve station efficiency and optimize train speed. The holographic perception of the status of complex equipment was realized in a virtual visualization platform, and the multi-professional environment was realized. Comprehensive linkage management and control of equipment solves the problem of station life-wide health status evaluation and early detection of faults. The results were applied to Rail Transit Line 17, and the operation and maintenance efficiency was greatly improved. The original workload of 4-5 station operators working together for 2 hours was reduced to half an hour for one attendant, that is, the work of 10 person hours was compressed to 0.5 person hours. 4. Key technologies for waterproofing in underground station construction and design of long-span track bridges. Key technologies for efficient waterproofing of underground diaphragm walls have been proposed and constructed, which solves the problems of poor waterproofing effect and high cost in underground station construction, and insufficient crossing capacity of rail transit bridges. The application of the results has significantly improved the waterproofing effect. The maximum settlement of surrounding pipelines during the construction period is only 5mm, and the waterproofing cost is reduced by 24.6%. It is the first time to develop a rail transit ldquo; double U+ box-type variable cross-section large-span continuous beam. The maximum span has been greatly increased, solving the problem of limited spanning capacity. The maximum span has been increased to 70m, an increase of 100%. A total of 56 patents and software copyrights have been applied for the innovative achievements of this project, and 36 authorized patents and software copyrights have been obtained (2 for soft works), including 20 authorized invention patents. Published 58 academic papers, including 18 papers included in SCI/EI, and a total of 269 citations at home and abroad. The technical achievements achieved in this project have been successfully applied to major projects such as Shanghai Rail Transit Line 17 and Line 14, Nanjing Metro, and Ningbo Metro. The application of this project has generated economic benefits of 2.032 billion yuan in the past three years. The application of project results has also produced good social benefits.