地下空间开发的实践与理论总结仍然在不断深化与完善过程中，众多城市、城市

The practice and theoretical summary of underground space development is still in the process of continuous deepening and improvement. The demand for underground space in many cities, urban core areas, and high-density development areas is urgent, and its development value has yet to be excavated and development methods need to be improved. The development concept continues to change.

The practice and theoretical summary of underground space development is still in the process of deepening and perfecting, the demand for underground space in many cities and cities, the core lot slots and high-density development lots is urgent, and the development value is yet to be excavated, the development mode needs to be perfected, and the development concept continues to change.

The practice and theoretical summary of underground space development are still in the process of deepening and improving. Many cities, core areas of cities and high-density development areas are in urgent need of underground space, while its development value remains to be explored, development mode needs to be improved, and development philosophy continues to change.<br>