Statistical analysis of site investigation data to find irregular zones and layers
Statistical analysis of site investigation data to find irregular zones and layers
The layers in a soil stratum are normally idealized to a uniform continuum. However, irregular inclusions of material in such layers can influence the geotechnical behavior of the soil layers significantly. This includes the presence of boulders in glacial till, which can be very detrimental to pile drivability in such layers, as well as silt inclusions in clay, which can drastically increase the horizontal hydraulic conductivity. The latter can also increase the risk of slope instability since silt layers constitute zones where the localized sliding can occur. Herein, a statistical approach is demonstrated to conduct a synthetic site investigation, in which the presence of irregular zones is simulated with Monte-Carlo simulation, which is subsequently compared to the real site investigation. This is demonstrated for boulders in a glacial clay, and the expansion of the method to an assessment of the presence of continuous drained layers of silts and sands in clay, and other irregular zones in soils, is elaborated. The suitable extent of a site investigations and the need for furthers tests can then be determined based on a comparison between the simulations and the actual site investigation.
Maedeh Alinejad; Anders Beijer Lundberg
28th European Young Geotechnical Engineers Conference (EYGEC2024)
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