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Geomechanics Lab
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The lab studies the mechanical behavior of ground, the foundation that underpins infrastructure.
AboutAbout the lab
The mechanics of the ground that quietly supports infrastructure.
The Geomechanics Lab studies the mechanics of the ground that quietly supports civil infrastructure structures from below.
Building safe infrastructure requires an accurate understanding of how geomaterials respond to external actions such as earthquakes and rainfall.
It is also important to clarify the complex interaction between ground and structures and to reveal their mechanical behavior.
Using both experiments and numerical analysis, the lab investigates everything from the mechanical properties of ground as a "material" to ground-structure interaction.
Key terms
- Multiphase mixture
- A material made of solid soil particles mixed with water and air in the voids between them. Soil is a typical example, and its overall strength and permeability depend on its microscopic behavior.
- X-ray micro-CT
- A device that takes cross-sectional X-ray images of the interior, making it possible to see the arrangement of grains and water inside soil in 3D without destroying the sample.
- Discontinuum
- A body that is not continuous, made up of many blocks or rock masses that touch, separate, and slide against each other. Masonry structures and heavily fractured rock masses are examples.
NewsLab news
Professor Higo and colleagues' paper published in Computers and Geotechnics
Assistant Professor Eshiro received the Outstanding Presenter Award at the 61st Japan National Conference on Geotechnical Engineering (Japanese Geotechnical Society)
Professor Higo and colleagues' paper published in Géotechnique
Research results on hydraulic fracturing of porous media published in Comput. Methods Appl. Mech. Engrg.
Research results on large-deformation analysis of unsaturated soil published in Computers and Geotechnics
ResearchResearch themes
Ground supports infrastructure structures. The lab clarifies how geomaterials respond to various external actions and how ground and structures interact, by combining laboratory tests, model experiments, and field measurements with numerical analysis.
*Illustrative imageMultiscale behavior of geomaterials
Soil is a multiphase mixture made of soil particles of varied sizes and shapes, with water and air in the voids between them. Using X-ray micro-CT to visualize the interior and numerical simulation, the lab interprets macroscopic phenomena from a microscopic perspective.
*Illustrative imageComputational mechanics simulation for ground
The lab develops analysis techniques for a wide range of problems, including ground-structure and ground-fluid interaction and the seismic behavior of rock slopes.
*Illustrative imageModeling the failure of geomaterials
Using multiphysics computational methods, the lab simulates phenomena in which fracture and stress waves, fluid-solid interaction, and heat transfer are intertwined.
*Illustrative imageProtecting historic masonry structures
Applying the discontinuum numerical analysis techniques it is developing, the lab is working to clarify how masonry structures become unstable and to develop methods for evaluating their stability. One of its targets is the Angkor monuments, a World Heritage site.
MembersFaculty
The members of the Geomechanics Lab consist of faculty, secretaries, and doctoral, master's, and undergraduate students.
- ProfessorYosuke Higo
- Associate ProfessorZHU Fan
- Associate ProfessorRyota Hashimoto
- Assistant ProfessorShizuka Eshiro
- Program-Specific Assistant ProfessorLU Zirui
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Soil sample Château d’Yquem, Sauternes” Megan Mallen / CC BY 2.0 (cropped)
- Multiscale behavior of geomaterials: “Icelandic Sand µCT” SecretDisc / CC BY-SA 3.0 (cropped)
- Computational mechanics simulation for ground: “Rockfall slope at the Old Stone Quarry, Sevastopol, Door County, Wisconsin” BobbbyLight / CC BY 2.0 (cropped)
- Modeling the failure of geomaterials: “Plumose Fracture 2” Michael C. Rygel / CC BY-SA 3.0 (cropped)
- Protecting historic masonry structures: “Kanazawa Castle stone wall 1” Asanagi / CC0 (cropped)
- Related lab (地震ライフライン工学): “Water supply pipeline crossing the Canning River from Shelley to Wilson, June 2021 02” Calistemon / CC BY-SA 4.0 (cropped)
- Related lab (土木施工システム工学): “Kazan Tunnel Kyoto JPN 004” Ignis / CC BY-SA 4.0 (cropped)
- Related lab (構造ダイナミクス): “Earthquake proof! (mcpherson-fig2)” ESO / CC BY 4.0 (cropped)
- Related lab (社会基盤創造工学): “General Rafael Urdaneta Bridge view from the lake to Cabimas side” Wilfredor / CC0 (cropped)
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