- Please Solve In 30 Minute 1 (46.5 KiB) Viewed 32 times
please solve in 30 minute
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answerhappygod
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please solve in 30 minute
please solve in 30 minute
A tunnel of 10 m span is driven through slightly weathered granite with a dominant joint set dipping perpendicular to tunnel axis at 45° with the direction of the drive. Uniaxial compressive strength is 75 MPa and average RQD value is 60%. The slightly rough and slightly weathered joints with a separation of 0.5 mm are spaced at 800 mm and the length of discontinuities are 1-3 m. The tunnelling conditions are anticipated to be wet. Find the rock mass class based on the given information. What is a stand up time for this tunnel?
A tunnel of 10 m span is driven through slightly weathered granite with a dominant joint set dipping perpendicular to tunnel axis at 45° with the direction of the drive. Uniaxial compressive strength is 75 MPa and average RQD value is 60%. The slightly rough and slightly weathered joints with a separation of 0.5 mm are spaced at 800 mm and the length of discontinuities are 1-3 m. The tunnelling conditions are anticipated to be wet. Find the rock mass class based on the given information. What is a stand up time for this tunnel?
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