COMPARISON OF TUNNELLING METHODS NATM AND ADECO-RS Article Swipe
YOU?
·
· 2015
· Open Access
·
· DOI: https://doi.org/10.14311/cej.2015.01.0003
· OA: W2562050461
The New Austrian Tunnelling Method (NATM) has been often used in the CzechRepublic in last two decades. One of the methods, without application in the Czech Republic,is an Italian method called ADECO-RS, which has reached significant use in Italy and someother countries. It is the method of controlled deformation, which uses mainly the horizontalanchoring of the tunnel face to reinforce the area in front of the face (advance core). Thistechnology is especially important in weak and soft rocks where is necessary to excavatequickly and smoothly with minimum disruption of initial stress state of the rock mass in thevicinity of the excavation. The use of NATM can be in some cases uneconomical andtechnically inadequately challenging and in such cases would be appropriate to chooseanother technology.Given the facts above, in the Czech environment there is no data available forcomparison of these methods not only in terms of numerical modelling, but also in terms offeasibility and usability.The paper summarizes history of the tunnelling methods and it is closer devoted toNATM and ADECO-RS tunnelling approaches. The basic principles of both methods are setand further the comparison of these methods is made on a theoretical level.The paper hereinafter includes the analysis of fibreglass face anchors applicationduring the construction of three-aisled Veleslavín Station and the impact assessment of tunnelface anchoring during the excavation of ventilation tunnel on the newly built part of the PragueMetro „V.A“.The paper also deals with practical knowledge gained during the technical visit of ItalianVal di Sambro Tunnel which is built according to ADECO-RS approach. These findings areessential for the correct interpretation of Lunardi method.
