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Abstract: The advance of a TBM during the excavation process is guaranteed by means of the thrust of the jacks over the last placed ring, which acts as a reaction frame. These loads generate bursting stresses that might crack the precast segments during this phase. In this regard, the width of these cracks usually reduces once the soil pressure is applied; however, sometimes these cracks can lead to the...
Abstract: The use of structural fiber as replacement of the traditional reinforcement in precast concrete segmental linings is becoming a widespread practice. Prove of this are the more than forty examples of application in tunnels and vertical shafts that are already constructed or under construction in different countries all over the world. The success of using fibers in these structural elements lies...