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Disaster Prevention Geotechnical Engineering Lab
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The lab studies geotechnical disaster prevention to protect everyday life from earthquakes and heavy rain.
AboutAbout the lab
Learning geotechnical disaster prevention to protect lives from disasters.
The Disaster Prevention Geotechnical Engineering Lab conducts research and education aimed at preventing natural disasters such as earthquakes and heavy rain before they occur and minimizing the damage they cause.
Students learn theories for understanding disaster phenomena and predicting damage, and acquire knowledge of urban design that is resilient to disasters.
The lab was established in April 1998 as one of the geotechnics chairs in the Social Infrastructure Division of the Faculty of Engineering, and since April 2021 it has continued its research and education in the Department of Civil Engineering.
Lab visits are accepted at any time.
Key terms
- Critical Line for Sediment Disaster Alerts (CL)
- A criterion for issuing sediment disaster warning information, set on the basis of past disasters. It does not take into account factors other than rainfall, such as topography and geology
- Reinforced soil method
- A method that stabilizes an entire earth structure by laying or inserting reinforcing materials such as steel members and geotextiles into the soil
- Geotextile
- A reinforcing material made of synthetic polymers. Woven fabrics, nonwovens, nets, geogrids, and others have been used
NewsLab news
The professor and colleagues won the Digital Twin and DX Works Award from the Japan Society of Civil Engineers
A paper by the professor and colleagues won the Japan Society of Civil Engineers Paper Award for fiscal 2023 (Reiwa 5)
A student won the Excellent Student Award from the Kyushu Branch of the Japanese Geotechnical Society
ResearchResearch themes
To prevent disasters before they occur and minimize damage, the lab teaches theories for understanding disaster phenomena and predicting damage, along with knowledge of disaster-resilient urban design. On that basis, it works on research such as building real-time disaster warning systems that predict the occurrence of disasters and proposing risk management methods that reduce damage.
*Illustrative imageEstimating New Sediment Disaster Warning Criteria
The Critical Line (CL) for sediment disaster alerts, which is the criterion for issuing sediment disaster warning information, does not take topography, geology, or vegetation into account. Targeting Fukuoka Prefecture, the lab estimated the 60-minute cumulative rainfall and the Soil Water Index, which form the vertical and horizontal axes of the CL, using three types of machine learning and compared their accuracy.
*Illustrative imageNew Reinforcement Technology for Expressway Slopes
Reinforced soil methods stabilize an entire earth structure by laying or inserting reinforcing materials such as steel members and geotextiles into the soil. This research is developing a new reinforcement technology for expressway slopes that can withstand earthquakes and sudden localized torrential downpours.
*Illustrative imageSelf-Healing Ground Improvement Technology
The lab aims to develop a ground improvement technology in which ground that has once undergone shear failure from localized torrential rain or a major earthquake heals and repairs its own shear surface, recovering by itself to more than 90% of its original shear stiffness and strength within three days. The goal is to accelerate and enhance the self-hardening properties of construction by-products and the strength recovery characteristics provided by microorganisms to a level that can be used in practice.
*Illustrative imageSolidification Treatment to Recycle Dredged Sediment
The lab is developing a treatment method that recycles dredged sediment into construction materials and other products that have a reduced volume and strength comparable to concrete. It uses a low-cost, low-energy forming technology that does not use heat, and is carried out as joint research with the Joint Research Division of Marine Port Environment and Disaster Prevention, Faculty of Engineering, Kyushu University.
MembersFaculty
The members of the Disaster Prevention Geotechnical Engineering Lab consist of faculty, technical staff, administrative assistants, and doctoral, master's, and undergraduate students.
- ProfessorKiyonobu Kasama
- Assistant ProfessorLi Yang
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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: “Road failure from slope instability in Shasta-Trinity National Forest” Shopstone / CC0 (cropped)
- Estimating New Sediment Disaster Warning Criteria: “ElSalvadorslide” USGS / Public domain (cropped)
- New Reinforcement Technology for Expressway Slopes: “1261Views of Maasim River walls-slope protection construction 01” JFVelasquez Floro / CC BY-SA 4.0 (cropped)
- Self-Healing Ground Improvement Technology: “Soil nail installation for a highway abutment” AppalachianCentrist / CC BY 4.0 (cropped)
- Solidification Treatment to Recycle Dredged Sediment: “Sédiments de dragage d'une darse du port de Marseille (Ifremer )” Stephane Lesbats (IFREMER, Pôle Images, Centre Bretagne - ZI de la Pointe du Diable - CS Plouzané, France) / CC BY 4.0 (cropped)
- Related lab (地盤工学研究室): “Geotechnical equipment in Bellevue, WA” SounderBruce / CC BY-SA 4.0 (cropped)
- Related lab (災害数理研究室): “Tsunami simulations Ofunato City” Ōfunato City, Prefecture Iwate, Japan / CC BY 3.0 igo (cropped)
- Related lab (沿岸海洋工学研究室): “Seawall-large(USGS)” USGS / Public domain (cropped)
- Related lab (水圏環境工学研究室): “Pentwyn Reservoir in drought (geograph 7271833)” Martin Laverty / CC BY-SA 2.0 (cropped)
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