LA CONSTRUCCION DEL SOTERRAMIENTO DE FERROCARRIL BAJO DIFICILES CONDICIONES POR EL AGUA FREATICA EN LA CIUDAD DE CADIZ

Se describen dos pruebas a escala real, para la construccion, en zanja con muros-pantalla, de un tunel ferroviario en la ciudad de Cadiz (Espana), excavando unos 9 metros de terreno, cuaternarios y pliocenos con cementacion variable, bajo el nivel freatico situado a unos 2 metros bajo la superficie. La primera ha consistido en un pozo rectangular, de 21,6 por 6,2 metros cuadrados, con una presolera resistente e impermeable ejecutada con columnas de jet-grouting efectuadas con diferentes parametros de inyeccion. La segunda ha comprendido un conjunto de ensayos de bombeo realizados con diez pozos para conseguir un rebajamiento del nivel freatico de unos 8 metros, asi como la puesta a punto de un modelo 3D para analisis del mismo. (A) Resumen en ingles: THE CONSTRUCTION OF A RAILWAY LINE THROUGH THE CITY OF CADIZ (SPAIN) UNDER DIFFICULT GROUNDWATER CONDITIONS. this paper describes two full-scale field tests associated with the construction, in excavation between diagraph walls, of a railway tunnel through the city of Cadiz, Spain. The excavation took place through approximately 9 metres of Quaternary and Pliocene deposits, with varying degrees of cementation, below a water table located at approximately 2 metres below the ground surface. The first triad consisted of a rectangular excavation of 21.6 by 6.2 square metres, sealed at the base with an impermeable "plug" constructed by jet grouted columns carried out using different injection techiniqies and parameters. The second trial consisted of a series of pumpings tests undertaken with ten wells to achieve a lowering of the ground water table by approximately 6 metres additionally a 3D finit difference model has also been constructed to alalyse the results obtained from the field trial. (A)

  • Authors:
    • OTEO, C S
    • DEL RIO, F
    • SOLA, P R
  • Publication Date: 2002-4

Language

  • Spanish

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Filing Info

  • Accession Number: 01191124
  • Record Type: Publication
  • Source Agency: Centro de Estudios y Experimentación de Obras Públicas (CEDEX)
  • Files: ITRD
  • Created Date: Oct 7 2010 2:25PM