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Soil stabilization in new railway construction

4. Alternative proposals

Stabilized materials make possible those soils of the own track can be used in different areas of
the work that has to be built as the following:
• Landfills: treatment with a binder allows the reuse of the soils of the track, when their
geotechnical properties are poor, and improving its support capacity.
• Foundations for embankments or structures: stabilization of soft soils that support
embankments improves its ability to support and protect these areas of moisture, reducing
the settlements of the embankments.

• Zones of transition: the stabilization of materials in the areas beside the engineering
structures or hard points of the platform allows a gradual transition of behavior and rigidity
of the materials.
• Track bed layer: any soil may be used provided that their geotechnical characteristics
are improved. Thus, this layer will better support the solicitations during its service life,
protecting the lower ones.

• Special areas: in certain cases, the compromised situation in some areas of the fillings, as
flood areas, can be designed with some fillings stabilized with binder.

Modified of the soils characteristics in the case of using lime:

International Congress on High-speed Rail: Technologies and Long Term Impacts - Ciudad Real (Spain) - 25th anniversary Madrid-Sevilla corridor 241