Table 4 The uncertainty characteristics of parameters.

From: Fuzzy random sensitivity analysis for the overall structure reliability of reinforced concrete freezing wellbores in deep alluvium based on hidden Markov model

Uncertainty characteristic distribution

Uncertainty of compressive strength of concrete axis

Uncertainty of circumferential reinforcement ratio

Uncertainty of thickness to diameter ratio

Uncertainty of calculating coefficient

Uncertainty of soil layer depth

Mean

0.992

1.041

1.033

0.850

0.956

Standard deviation

0.185

0.074

0.254

0.217

0.032

Coefficient of variation

0.129

0.072

0.245

0.254

0.178

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