Abstract: The massive volume of ground depot construction often has adverse effects on integrating urban traffic and public landscapes, restricting urban planning. With the increasing requirement of city development on the public environment, the multispace integrated design of the building above ground for the underground depots becomes more and more important in improving the urban public environment quality, enlarging the ground construction scale, and improving the landintensive utilization and output efficiency. In this paper, a case study is conducted on the vehicle depot design of the Shenzhen metro line 13, and the underground depot + superstructure above depot mode and the feasibility of sinking the metro depot and the multispace integrated design of the building above ground for the underground depot are discussed from the aspects of continuous design of superstructure above depot with the urban landscape and road traffic, design difficulties of underground vehicle depots, and the influence on cost and operation and maintenance. The main researches and conclusions are as follows. (1) After the depot sinks, the integrity of the urban land can be protected in maximum, the construction scheme of the property building above depot and the transportation organization design can be benefited, the adverse effects on the urban landscape fragmentation can be reduced, and the urban public environment can be improved. (2) The sunk depot can provide lateral constraints on the structure of the overlying buildings, and the development and design orientation of the overlying buildings can be more flexible, which can improve the height of the buildings and increase the utilization rate of land. (3) The firefighting in underground vehicle depot is a crucial and challenging point, whereas there is no mature experience for reference at present. The structures such as ground passageway and the fire fighting passageway have a significant influence on the integrity of the building land above the depot, hence, it needs overall planning, continuous exploration, and practice. (4) The construction of underground depot will increase the project cost and construction risk to a certain extent. (5) The planning and design of underground depot and above buildings should be fully and carefully considered. (6) In the late operation, adverse factors such as humidity, flood season, and fire should be rationally dealt with, and the health of the workers in the underground enclosure space should be guaranteed.

Key words: metro, underground depot, intensive land use, fire protection design, urban public environment, superstructure above depot