Fig 1.
Schematic diagram of the analysis model and conformal mapping.
Fig 2.
Cross-section of horseshoe tunnel.
Table 1.
Calculation parameter values.
Fig 3.
Finite element model diagram of horseshoe tunnel.
Fig 4.
Analytical vs numerical solutions for vertical and horizontal displacements around a horseshoe tunnel.
Fig 5.
Schematic diagram of β sphere in two-dimensional case.
Table 2.
Calculates parameter statistics.
Table 3.
Comparison of the calculation results of the four reliability methods.
Fig 6.
Influence of mean of load parameters on reliability.
Fig 7.
Influence of variation coefficient of parameters on tunnel reliability.
Fig 8.
Influence of the correlation coefficient between E and μ on reliability.