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This article presents a case of application of geostatistical methods in geotechnical engineering: There is a railway platform, going to be built on compressible soils which presents important settlement. Geotechnical data were analyzed by a geostatistical approach using GIS software to characterize the spatial variability of the thickness of the compressible soils and their deformation Module. Then these data were crossed with settlement calculations by oedometer method to estimate the distribution of soil compaction on the entire site. I. INTRODUCTION Soil, whatever their nature, are deformed under the effect of loads applied to them with highly variable amplitudes. And it is this degree of deformability that allows classifying soils into highly compressible soils (soils that may undergo significant settlements) and slightly compressible soils. A calculation of the settlements is then necessary to ensure that they are acceptable for structures to be built. This paper presents a geostatistical approach to estimate the settlements of compressible soils located below a platform for a High-Speed Line (HSL). First, we present an approach for estimating an elastic Module of compressible soils by using the results of odometer tests performed on samples taken by core drilling. Then these values are used to calculate soil compaction, based on the compressibility characteristics obtained from odometer tests. The settlement values obtained depend on the geology of the site; lithological variability is therefore taken into account. A geostatistical treatment of these values allows finally to establish a map showing the spatial distribution of the settlements across the study site.

Geostatistical approach to the estimation of the uncertainty and spatial variability of soil settlements in the region of Kenitra (Morocco)