01 June 2018 0 5K Report

I saw there are 2 formulas that said

1. GSI = RMR89 - 5

2. Hoek and Marinos (2000) GSI chart based on RMR89

GSI = Jconditionx1.5 + RQD/2

booth of them gives diferent result , number 2 gives GSI'value higher then the second one

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