17
views
0
recommends
+1 Recommend
1 collections
    0
    shares
      • Record: found
      • Abstract: found
      • Article: found
      Is Open Access

      Translated title: Tunnelling in urban areas by EPB machines: technical evaluation of the system

      research-article

      Read this article at

      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Abstract

          The paper refers to the methods adopted for building a high-speed railway tunnel system between Bologna and Firenze (Italy), focusing attention on the Bologna node which represents the heart of the system, connecting the high speed network's main lines. The project includes 9 tunnels, accounting for 73 km of the 78 km route crossing below the Apennines. The paper pays attention to the main aspects to be taken into consideration for correctly choosing the tunnel boring machinery (TBM) to be used in urban areas. The fundamental point in analysing technical aspects regarding an earth pressure balance (EPB) machine concerned storing the main excavation parameter values; having collected and organised such data, statistical methods were used for processing it, the instantaneous velocities attained were empirically estimated and idle times were evaluated. The evaluation was made by calculating excavation specific energies (during different excavation phases) to find a satisfactory correlation with the type of ground crossed. Interesting results have been found by comparison with other excavation parameters; in particular, a better understanding of an earth pressure balance shield's working phases has been reached thanks to an experimental study conducted during the construction of tunnels for a high-speed railway system in Italy. The paper contains details collected regarding the operation of two different EPB machines.

          Translated abstract

          Este artículo se refiere a los métodos utilizados para la construcción de túneles para un sistema de trenes de alta velocidad entre Bolognay Firenze (Italia), elpunto de interés está sobre el nodo de Bologna, como el corazón de sistema, conectando las líneas principales de la red de alta velocidad. El proyecto incluye nueve túneles, con 73 de los 78 km cruzando por debajo de los Apeninos. Este artículo presenta los principales aspectos a tener en consideración para la correcta selección de máquinas tuneladoras (TBM) utilizadas en las áreas urbanas. El fundamento en el análisis de los aspectos técnicos consiste en un balance de presión de tierra (EPB) de la máquina relacionado a los principales parámetros en la excavación; una vez recogido y organizado los datos, se realizaron análisis estadísticos, se estimaron las velocidades empíricamente y evaluaron los tiempos de espera. La evaluación fue realizada para el cálculo de las energías específicas de excavación (en diferentes fases de perforación) para encontrar una correlación satisfactoria con el tipo de terreno atravesado. Los resultados obtenidos son interesantes en comparación con parámetros de otras excavaciones; en particular, una mejor compresión en el balance de la presión de tierra en cada fase de trabajo, ha sido descrita gracias a un estudio experimental realizado durante la construcción de túneles para un sistema de trenes de alta velocidad en Italia. Este artículo contiene información detallada recogida de la operación de dos maquinas EPB diferentes.

          Related collections

          Most cited references36

          • Record: found
          • Abstract: not found
          • Article: not found

          The concept of specific energy in rock drilling

          R. Teale (1965)
            Bookmark
            • Record: found
            • Abstract: not found
            • Article: not found

            Correlation of specific energy with rock brittleness concepts on rock cutting

              Bookmark
              • Record: found
              • Abstract: not found
              • Article: not found

              A fuzzy logic model to predict specific energy requirement for TBM performance prediction

                Bookmark

                Author and article information

                Journal
                esrj
                Earth Sciences Research Journal
                Earth Sci. Res. J.
                Universidad Nacional de Colombia (Bogotá, Distrito Capital, Colombia )
                1794-6190
                June 2011
                : 15
                : 1
                : 5-11
                Affiliations
                [01] Torino orgnamePolitécnico di Torino orgdiv1Environment and Geo-Engineering Department Italy marilena.cardu@ 123456polito.it
                Article
                S1794-61902011000100001 S1794-6190(11)01500101
                1694e8cb-781a-47ee-8918-ce26f1f3ca55

                This work is licensed under a Creative Commons Attribution 4.0 International License.

                History
                : 15 May 2011
                : 13 January 2011
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 30, Pages: 7
                Product

                SciELO Colombia

                Categories
                Originals Articles

                balance presión tierra (EPB),tunnelling,tunnel,excavation parameter,specific energy,earth pressure balance (EPB),túnel,parámetro excavación,energía especifica

                Comments

                Comment on this article