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Geotechnical Engineering Lab
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A lab tackling disasters and environmental problems related to the ground.
AboutAbout the lab
Exploring the relationship among people, the ground, and society, and thinking about coexistence between people and the Earth
The Geotechnical Engineering Lab conducts research to solve engineering problems related to the ground, which is where people live and which supports social infrastructure from the foundation up.
In addition to fundamental research for building safe and reliable infrastructure, the lab also conducts applied research on disasters and environmental problems that are becoming more severe due to climate change.
Research is carried out broadly, from both theoretical and experimental sides and from both fundamental and applied sides.
As project research, the lab also works on desertification control technology that supports local self-reliance, through joint surveys with the Mongolian Academy of Sciences, and on ground disasters in Kyushu and Okinawa associated with climate change and measures to adapt to them.
Key terms
- Unsaturated soil
- Soil in which the spaces between soil particles contain both water and air
- Ground improvement
- Techniques that harden or reinforce the ground so that it can better support structures
- Piping failure
- A phenomenon in which water flows through the foundation ground of an embankment, carries soil particles away, and causes the embankment to fail
NewsLab news
View More ↗ResearchResearch themes
The Geotechnical Engineering Lab conducts research to solve problems related to the ground that supports infrastructure from the foundation up. In addition to fundamental research, the lab also conducts applied research on disasters and environmental problems that are becoming more severe due to climate change.
*Illustrative imageGround Stabilization Technology for Advanced Land Use
The lab aims to develop a new ground improvement technique that combines mattress reinforcement with floating-type ground improvement, in which the improved ground does not reach the bearing layer. It also aims to use granulated blast furnace slag and recycled aggregate that has fixed CO2 in low-replacement-ratio SCP (sand compaction pile) technology, a ground improvement method.
*Illustrative imageEvaluating the Moisture and Strength of Unsaturated Soil
To evaluate slope stability under rainfall, the lab studies the water retention characteristics and strength characteristics of unsaturated soil in relation to each other. It is working to build a laboratory test system (the One-Sample System) that can evaluate infiltration characteristics and strength characteristics in a short time.
*Illustrative imageEvaporation of Water from Soil
In arid regions, drought and desertification are problems because of high evaporation rates and little rainfall. Using dry column tests and image analysis, the lab studies how evaporation proceeds, aiming to propose an environmentally friendly soil cover system that maximizes water retention.
*Illustrative imageAssessing the Risk of River Embankments in Preparation for Heavy Rain
To detect signs of slip failure of embankments caused by seepage, the lab is developing sheet-type sensors that can measure changes such as the degree of saturation, and is studying where to place them optimally. For piping failure of the embankment foundation ground, it is creating an index to evaluate the hazardous zones where sand boils and leakage occur, and verifying the index by comparing it with past damage cases.
MembersFaculty
The members of the Geotechnical Engineering Lab are faculty, academic researchers, administrative assistants, and master's and undergraduate students.As of 2026
- Associate ProfessorRyohei Ishikura
- Assistant ProfessorAdel Alowaisy
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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: “Geotechnical equipment in Bellevue, WA” SounderBruce / CC BY-SA 4.0 (cropped)
- Ground Stabilization Technology for Advanced Land Use: “20230107 Construction Site Nuremberg” Flocci Nivis / CC BY 4.0 (cropped)
- Evaluating the Moisture and Strength of Unsaturated Soil: “Chang'e-5 soil samples” Hui Ren / CC BY 4.0 (cropped)
- Evaporation of Water from Soil: “Incorporate Mulching, conserve soil moisture” Beendy234 / CC0 (cropped)
- Assessing the Risk of River Embankments in Preparation for Heavy Rain: “09509jfFlood Control Cut-Off Channelling Dike Embankment Sheet Pile Candaba, Pampangafvf 08” Judgefloro / CC0 (cropped)
- Related lab (建設材料システム工学研究室): “Kintsugi on broken Kyūsu lid-bottom PNr°1259” D-Kuru / CC BY-SA 4.0 (cropped)
- Related lab (防災地盤工学研究室 グローバル地盤災害環境適応学グループ): “Liquefaction,Hinode,Itako-city,Japan” Katorisi / CC BY-SA 3.0 (cropped)
- Related lab (防災地盤工学研究室): “Road failure from slope instability in Shasta-Trinity National Forest” Shopstone / CC0 (cropped)
- Related lab (地圏環境システム工学研究室): “Outcrop in Nagoe Kiridoshi Pass” Osumi Akari / CC BY-SA 4.0 (cropped)
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