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SOIL IMPROVEMENT METHODS FOR ROAD CONSTRUCTION
Abstract
Various techniques for ground improvement are in use many decades to reduce the settlement of embankments and to accelerate the consolidation settlement of soft soil layers such as preloading, soil replacement, lime/cement stabilization, dynamic consolidation, vibro-stabilization, vertical drains, deep mixing methods or reinforced soil. Moreover, other more innovative solutions recently developed are also available, including natural and synthetic fibres or tyre powder penetration. Vertical drains, stone columns, dynamic compaction, preloading, and soil replacement are commonly used in geotechnical practice in Slovakia. The most frequently used ground improvement method in Slovakia was analyzed in comparable engineering-geological and hydrogeological conditions based on the results of geotechnical monitoring in the paper. The subsoil consists of compressible soft soils with low permeability. The measured values of embankment settlements during geotechnical monitoring confirmed high efficiency of vertical drains - vibro replacement stone columns.
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