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Mejora de la Seguridad Vial mediante una mezcla discontinua y la tecnica de Microfresado

Improvement of the Road Security using a sand asphalt layer and using the Microgrinding tecnique

La Autovia Porrino Vigo, CN-120 es uno de los tramos con mayor volumen de trafico de Galicia. Asi en el ano 2001 registro un IMD de 51.408 con un 7,82 por cien de pesados. Entre los meses de Enero a Julio del 2003 fueron realizadas las obras de mejora de la Seguridad Vial de esta autovia entre los p.k. 655+000 al 668+000. Dada la alta intensidad de trafico, y el que las obras afectaran a la totalidad de la superficie y a la totalidad del tramo, la Direccion General de Carreteras del Ministerio de Fomento decidio que las obras se desarrollaran en horario nocturno. A finales de 2003 entro en vigor la Orden 3459/2003 de 28 de Noviembre por la que se aprobo la Norma 6.3-I.C. "Rehabilitacion de firmes" de la Instruccion de Carreteras. En dicha Norma se define microfresado, como la tecnica de fresado que afecta a una profundidad muy reducida con el objeto de mejorar significativamente la textura superficial del pavimento o colaborar en la regularizacion de la superficie a rehabilitar. En este articulo se recogen los trabajos de rehabilitacion del firme del mencionado tramo, que consistieron en un refuerzo del firme, que incluyo las demoliciones y fresados necesarios, asi como varios tramos de microfresado para aumentar la seguridad vial del tramo durante el desarrollo de las obras. Con posterioridad al refuerzo del firme, se extendio una capa de rodadura consistente en una capa de 3 cm de microaglomerado tipo M-10 con objeto de mejorar la microtextura y macrotextura del tramo. En este articulo se analizan las obras realizadas y los trabajos de seguimiento que han sido desarrollados por la Direccion de las Obras. (A). English abstract: The Porrino-Vigo, CN-120 motorway is one of the road sections with higher traffic volume in Galicia (Spain). Thus during 2001 its annual average daily traffic (AADT) reached the value of 51408 vehicles with 7,82 per cent of heavy vehicles. Between Jannuary 2003 and July 2003 there were carried out the works of improvement of the road security in this motorway, k.p. 655+000 to 668+000. Due to the high value of its traffic volume and because the works reached the whole surface and the whole road section, the Spanish Roads Administration decided that the works were to be carried out during the nights. At the end 2003 it became compulsory the Order 3459/2003 of November 28th by which it was approved the Standard 6.3-I.C. "Pavements rehabilitation" of the Spanish Road's Instruction. In this Standard we can see the definition of microgrinding technique as the grinding which affects to a very reduced depth in order to better significatevely the pavement's surface texture or contribute in the evenness of the surface to be rehabilitated. In this article we explain the pavement's works carried out in the above mentioned road section. These works, which were based on the pavement's reinforcement, included the demolition and grinding necessary, and also the microgrinding works carried out in several road sections in order to improve the road security of the road section during the above mentioned works. After the pavement's reinforcement, we laid on a M-10 sand asphalt wearing surface layer with a thickness of 3 cm, in order to improve the road's section microtexture and macrotexture. In this article we analyse the works carried out and we explain the surveillance which was done by Spanish Roads Administration. (A).

Language

  • Spanish

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Filing Info

  • Accession Number: 01179006
  • Record Type: Publication
  • Source Agency: Centro de Estudios y Experimentación de Obras Públicas (CEDEX)
  • Files: ITRD
  • Created Date: Oct 6 2010 5:16PM