Risk Assessment of Building Foundation Pit Construction Based on Fuzzy Hierarchical Comprehensive Evaluation Method

Table 5

Grading criteria for risk.

Scale	Risk value	Grade	Acceptance criteria	Control measures
I	[1, 3]	Slightly risk	Permissible	Strengthen daily management and timely changes
II	(3, 6]	General risk	Acceptable	Focused attention for prevention and control
III	(6, 9]	Significant risk	Unwilling to accept	Develop countermeasures for timely resolution
IV	(9, 16]	Highly risk	Unacceptable	Stop immediately, rectify, circumvent