Research Article

Plastic Zone Analysis of Deep-Buried, Noncircular Tunnel and Application on the High-Speed Railway in the Karst Area

Table 2

Maximum stress after the excavation stability at every step.

StepStress
(Mpa)
StepStress
(Mpa)

The first up-step1.21The first down-step1.53
The second up-step1.69The second down-step1.99
The third up-step1.94The third down-step2.32
The forth up-step2.48The forth down-step2.87
The fifth up-step2.79The fifth down-step2.94
The sixth up-step2.64——