Page 248 - 360.revista de Alta Velocidad - Nº 5

López-Bachiller Fernández, Miguel. Sampedro Rodríguez, Ángel. Díaz Minguela, Jesús.

Its advantages are:

• A reduction of 31.10 % in deflection.
• A reduction of 8.88 % in tension.

• An important height reduction.
• A 17% higher stiffness increase.
• A substantial reduction of the condition of the environment to avoid transport and
manipulation of materials extracted in other areas and the poured eventually to landfill.
• Use of local soils of the working place (excavation and materials from the tunnels, with
reduced technical limitations).
• Obtaining layers with more stable materials and greater life cycle.
• Reduction in the requirement for maintenance and repair work and its high cost that
they hinder and restrict the exploitation of the railway traffic.
• It is possible to obtain the desired stiffness and even, this rigidity can change in the path
depending on the soil characteristics and the dosage of binder (modulus variable in the
material). It is more, the rigidity is more homogeneous than in the case of use only soil
without binder.

8. Appendix 1: stabilizations in the spanish high speed railway

8.1 Stabilization with cement

• High speed Atlantic axis. Cerceda‐Meirama, access Sogama branch section.
Stabilization of formation layer and replacement of the Sub‐ballast by a soilcement
done on‐site with the same equipment or larger percentage of cement stabilized soil.
Company Ferrovial

• New railway access to the North and Northwest of Spain, Madrid ‐ Valladolid.
• Tramo: Valdestillas‐River Duero, stabilized with lime formation layer and stabilized
with cement service roads, and stabilization of technical structures in Valdestillas
blocks. Company: AZVI
• Tramo: Segovia‐Valladolid. Work: Stabilized in slabs beside structures with cement
and lime. Thickness 30 cm, April 2002. Company: Ute Valdestillla(Collosa‐Comsa).
Property: Entity manager of railway infrastructure
• Work: Ave Segovia source of this cross. Area 6,000 m2. Work: Stabilized with cement
through the dry. Thickness 30 cm, July 2005. Company: Vias y Construcciones.
• Work: Segovia AVE station. Stabilization of the platform of the track shoulders.
• New railway access to the Northest of Spain, Madrid ‐ Zaragoza ‐ Barcelona:

• Ave L' Arboç (Tarragona). Work: Stabilized with cement. Thickness 30 cm, September
2002. Company: Ute Ave L' Arboç (Dragdos‐Tecsa).

• Zaragoza ‐ Lerida. Stabilization of a layer of the platform in deforestation between
NII motorway towards Lleida to increase some capacity after spending the winter.

• AVE 350, Tr. Zaragoza. Area 165.000 m2. Work: Stabilized platform. Thickness 30 cm,
March 2001. Company: Ute AVE350 (Tecsa, Guinovart, Coprosa).

246 360.revista de alta velocidad