Abstract: The construction risk early warning of the deep excavation is an important task to ensure the safe construction of the excavation. However, the existing deep excavation’s early warning idea is based on the failure of one or more monitoring points as the instability of the deep excavation. Using the principles of ensuring the safety of the deep excavation, the safety early warning of the excavation is carried out from the safety of the excavation monitoring points and the safety of the entire excavation system. The early warning for the safety of the deep excavation monitoring points is realized by using the established safety early warning classification. The early warning of the safety and stability of the excavation system is to achieve a qualitative and quantitative evaluation of the safety and stability of the entire system by establishing an Analytic Hierarchy Framework (AHP) between monitoring data and the stability of the entire system throughout the monitoring project safety early warning grading table. The early warning method effectively combines the monitoring and the early warning and transforms the fuzzy relationship between the two into a clear and quantitative mathematical relationship, which provides a new idea to effectively solve the deep excavation safety early warning problem.

Key words: Excavated Area, Early Warning, Safety Warning Classification, Analytical Hierarchy Framework