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Physical modelling of shallow foundation behaviour on collapsible unsaturated silt

Explore centrifuge modelling of unsaturated soils. Review source evidence, methods and limitations for M.Tech research.

Explore centrifuge modelling of unsaturated soils through a published research reference related to Geotechnical Engineering / Soil Mechanics / Unsaturated Soil. This M.Tech resource summarizes the available source and suggests questions to validate before choosing an implementation.

Centrifuge modelling of unsaturated soils: source and project details

Research overview

This research resource provides academic guidance and structuring for investigating the hydro-mechanical response of shallow foundations on collapsible unsaturated soils. Based on the documented study, physical modelling is utilized to bridge the gap between laboratory testing and field-scale applications. Specifically, the source study details 50g centrifuge experiments conducted on a prototype shallow foundation with a 1.5 m diameter resting on a compacted unsaturated silt layer. The experimental setup evaluates wetting-induced collapse triggered by a rising water table, alongside assessing bearing capacity under both fixed water level conditions and active wetting phases. High-capacity tensiometers are employed to monitor suction profiles in flight at 50g.

The findings indicate that capillary rise-induced collapse is successfully replicated in loosely compacted silty soil, with deformation concentrated primarily in the lower region of the soil layer. Furthermore, a significant reduction in bearing capacity occurs as suction decreases. To support academic project development, this resource outlines how these physical observations can be coupled with numerical analyses to evaluate unsaturated soil mechanics, offering a structured framework for model validation and foundation design support.

Reference Paper Physical modelling of shallow foundation behaviour on collapsible unsaturated silt
Publication year (source record) 2026
Source document classification Research reference (type not independently verified)
Discovered via HAL metadata
Authors (source metadata) Francesca Casini, Juan Jorge MuΓ±oz, Sergio D.N. LourenΓ§o, Jean-Michel Pereira, Luc Thorel, Pierre Delage, Domenico Gallipoli, David Toll
Publication type (source metadata) journal-article
DOI (from source metadata) 10.1680/jphmg.25.00074
Metadata consistency check DOI registration metadata compared with indexed record; original PDF text not independently verified.
Evidence reviewed by generator Indexed abstract/description only; original full text, author names in PDF and methods require editorial verification.
Domain Civil Engineering
Sub-Domain Geotechnical Engineering / Soil Mechanics / Unsaturated Soil
Research source View research PDF
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Project or research direction

This is a source-backed research starting point, not a tested, ready-made student project. Any implementation requires independent feasibility, safety and results verification.

Possible tools or components to evaluate

Geotechnical centrifuge (50g), High-capacity tensiometers (HCTs), Finite element/finite difference coupled hydro-mechanical simulation software (e.g., PLAXIS, GeoStudio, or FLAC), Soil compaction apparatus.

Methods or operating principles to examine

Centrifuge testing at 50g scaling; 1.5 m diameter prototype shallow foundation simulation; In-flight suction monitoring using high-capacity tensiometers; Wetting-induced collapse simulation via capillary rise; Bearing capacity evaluation under variable suction states; Coupled hydro-mechanical numerical validation.

Outputs to plan and verify

Detailed suction profile evolution curves during capillary rise; Settlement versus load curves for the shallow foundation at different suction levels; Identification of deformation zones within the collapsible silt layer; Validated coupled numerical model matching the physical centrifuge boundary conditions.

Further study ideas to evaluate

Integration of different silt compaction densities to study collapse sensitivity; Evaluation of alternative foundation geometries (e.g., rectangular or raft foundations); Implementation of unsaturated soil-structure interface elements in the numerical model; Assessment of seismic loading on the partially saturated collapsible silt.

Check the complete source before describing any of these as new or absent from the original work.

Suggested verification steps

  1. Read the cited paper and check which methods, parameters and results it actually reports.
  2. Define a measurable project objective and list equipment or software you can access.
  3. Validate the proposed approach independently before claiming results, working code or experimental success.

Implementation ideas above are planning suggestions, not claims that the cited researchers built or tested those exact extensions.

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