Introduction:

• Analyzed the Drisko Twin Tunnel using  Rock Science 2D & 3D program.

• Handled the 3D modeling and analysis.

 

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(Fig.4-1 Rock mass properties of the tunnel)

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Details:

 

• Excavation Staging (Support).

 

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(Fig.4-2 Top heading, Shorcrete, Bench, Bolts and liner)

 

• Displacement and Yield Zone.

 

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(Fig.4-3 Displacement in 2D analysis)

 

 

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(Fig.4-4 Yield zone in 2D analysis)

 

• RS3 Modeling and Meshing.

 

 

 

 

 

 

 

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(Fig.4-5 Modeling and meshing in 3D analysis)

 

• 3D displacement in different K values.

 

The increase of  K value has more impact on the overall excavation stability than the decrease of  K value.

 

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(Fig.4-6 Different displacement in 3D analysis)

 

 

• Integration analysis.

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The total displacement of inlet and outlet of the tunnels is higher than that in the mid region.

 

 

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(Fig.4-7 Integration analysis)

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Analyzed Drisko Twin Tunnel in Greece

(MNE-547, 2016 Spring)