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NEW APPLICATIONS OF THE EXCAVABILITY INDEX FOR SELECTION OF TBM TYPES AND PREDICTING THEIR PERFORMANCE (2008)
The paper describes the selected significant developments, with the emphasis on the following findings: Charts are presented for more accurate determination, of the five input parameters of the RME, using graphical representation. New expressions to evaluate the influence of the efficiency of the TBM crew and the tunnel diameter are formulated. Specific correlations between RMR and the ARA are proposed for Open TBMs and Single Shield BMs. Specific criteria are established to select the most suitable type of a TBM when planning tunnelconstruction.
ITA-AITES World Tunnel Congress 2008, Agra, India
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