Can the basement of residential engineering be divided into three construction units?

The residential basement is divided into three construction units. The construction quality of basement and ground engineering needs to be effectively controlled and guaranteed. If it is contracted by different contractors, there will be inconsistencies, which will affect the quality of the whole project. Basement and ground engineering is an important part of residential engineering, and the progress and efficiency of the project have an important impact on the whole project cycle. Contracting by different contractors will lead to low construction efficiency and affect the progress of the whole project.