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  Recommendations for TBM-monitoring of face bentonite support

  Within the framework of the subway development strategic program more than 160 km of subway lines and 70 stations must be built during the period of 2011-2020; therefore, over 20 TBMs for the deep tunnel construction are involved [Elgaev, 2014]. Shield tunnel excavation technology contains active earth pressure balance support or face bentonite support (hydro support). Herewith it is possible to monitor the power indicators of the shield including the feed drive force of cutterhead adequate to ground resistance [Mazein, 2010]. Computer system for the collection and statistical processing of the basic technological parameters is able to backup them. This allows you to do an analysis of the TBM-boring, which has become history.

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