Tunnel Back Analysis Based on Differential Evolution Using Stress and Displacement

Table 2

DEA properties for back analysis.

Parameters	Value
Range of target variables	0.0 GPa ≤  ≤ 1.0 GPa,
	0.0 MPa ≤  ≤ 0.8 MPa,
	25°≤  ≤ 38°
Mutant constant, F	0.8 (0∼2)
Crossover constant, CR	0.8 (0∼1)
Number of population, NP	10
Maximum generation number	10