For a rock mass: RQD=80, J₁ = 4, J₁ = 1, and: Ja 1 Jw 0.33 a) Calculate the rock mass number ( b) We want to construct a circular tunnel with diameter of 10 m in the depth of 200 m below the ground surface in this rock mass. If the rock mass is not squeezing, determine the roof support pressure? c) If we want to use steel fiber reinforced shotcrete (SFRS)with shear strength of 5.5 MPa for the support of this tunnel, what would be the required thickness of the SFRS? (*

For a rock mass: RQD=80, J₁ = 4, J₁ = 1, and: Ja 1 Jw 0.33 a) Calculate the rock mass number ( b) We want to construct a circular tunnel with diameter of 10 m in the depth of 200 m below the ground surface in this rock mass. If the rock mass is not squeezing, determine the roof support pressure? c) If we want to use steel fiber reinforced shotcrete (SFRS)with shear strength of 5.5 MPa for the support of this tunnel, what would be the required thickness of the SFRS? (*

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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