Singapore is a country of small land but large population. The population density is close to 10000 per square kilometre. With a severe lack of land resource in Singapore, the government pays a great attention to the development and utilization of the urban underground space. From the 80's in the 20th century, a series of underground space projects in its technical and developmental level have been completed in Singapore. For example, the metro, the underground commercial street, the underground parking, the underground pipe network system, the underground storage cavern, the large public underground space. The development of underground space projects in Singapore has made a remarkable progress both in theory and in practice. The paper first reviews some successful underground space projects and then discusses the technical difficulties encountered in the construction process. The purpose of the paper is to highlight some valuable experiences in both theoretical and practical fields in the urban underground projects. Within the context of the current urban underground space development of large cities in China, some suggestions are made.

Singapore  /  urban underground space  /  metro  /  tunnel  /  underground storage cavern