Development Status and Trend of Urban Underground Space from Perspective of Patent

Based on the analysis of patent big data, combined with the research on the development of the industry, the article systematically sorts out the application trend, distribution of main application scenarios, IPC technical field distribution, major foreign countries and chinese major cities distribution of patent applications in the field of urban underground space at home and abroad. From the analysis results, China has become an important force leading the development of underground space technology; rail transit is an important factor in promoting the development of urban underground space; China has a large number of patents, but the quality needs to be further improved; the technical field layout of patents at home and abroad is highly similar. China has advantages in the field of underground parking and integrated pipe corridors. Foreign countries has advantages in sewage treatment and intelligent technology; the intelligent, integrated, and green development of urban underground space has become a consensus and future direction at home and abroad.