DYNA JOURNAL ENGINEERING

Key words:

Hormigón autocompactante de alta resistencia, Tren de alta velocidad, High resistance self compacting concrete, High speed train..

Article type:

ARTICULO DE INVESTIGACION / RESEARCH ARTICLE

Section:

VARIOUS

ABSTRACT
The tunnels located in the high speed train line going from Cordoba to Malaga pass through karstics areas of approximately one kilometer-long in Valle de Abdalajís, in the municipality of Álora (Malaga). During the construction of the tunnel great infiltration water flows were detected, causing important soil draggings through diverse fault areas. The adopted solution was the construction of reinforcement rings with high resistance self compacting concretes. The most difficult areas have an 80 MPa resistance value, as for the rest the values are 50MPa and 60 MPa.
The concrete was manufactured in a plant property of Hormigones y Minas S.A., located near the entrance of the tunnels in a piece of land handed over by Adif for that purpose.
Hormigones y Minas made an investigation with more than 130 doughies and 520 tests to determine the most appropriate dosage and, as a result, 22 equations were found correct. From these 22 equations the profiles for the materials to be used for the manufacturing of the concrete were obtained, having also present technical and economical factors.
Key words: High resistance self compacting concrete, High speed train.