Researcher Database

（Last updated : 2021-03-31 20:04:15）

FUKAGAWA Ryoichi

Department / Course College of Science and Engineering Department of Civil and Environmental Engineering

Title / Position Professor

Other Affiliations
1.	Kinugasa Research Organization Institute of Disaster Mitigation for Urban Cultural Heritage
2.	Research Organization of Science and Technology Frontier Research Center for Natural Disaster Mitigation
3.	Research Organization of Science and Technology Research Centre for Palaeoclimatology

Academic background
1.		│ Kyoto University Doctor of Engineering
2.	～1977	Department of Transportation Engineering │ Faculty of Engineering │ Kyoto University
3.	～1979	Doctoral Program (1st Semester) │ Transportation and Civil Engineering │ Graduate School, Division of Engineering │ Kyoto University

Research activities
1.		Japanese Society of Terramechanics
2.		International Society for Terrain-Vehicle Systems
3.		International Society for Soil Mechanics and Foundation Engineering
4.		The Japanese Geotechnical Society
5.		Japan Society of Civil Engineers
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Subject of research
1.	Development of monitoring system for evaluation of slope stability
2.	Development of sensor system for detection of slope deformation
3.	Evaluation of soil constants obtained from pressuremeter
4.	Interaction between ground and machine system
5.	Mechanism of slope failure

Research summary
Elucidation of slope failure mechanism and development of in-situ slope stability monitoring system 　Our laboratory conducts the following studies for mitigating slope disasters. ①Elucidation of slope failure mechanism 　In Kansai, Kii Peninsula flood occurred, causing many occurrences of massive failures, surface course failures and debris flows in 2011. On the occasion, we conducted local surveys at a lot of locations. Also at Kiyomizu-dera Temple that has been operating a monitoring system for slope stability monitoring for more than 10 years, slope failures have occurred very often in recent years, for which we also conducted the field surveys. Furthermore, we have conducted failure experiments of indoor model slope using rainmaking devices, and have advanced elucidations of slope failure mechanism. ②Elucidation of variation characteristics of water amount in slope surface course 　We have established on-site fields in Kiyomizu-dera Temple, Fudoji Temple, Awaji Island and other places, and set up tensiometers and other sensors. Each sensor has continuously conducted observation, and has revealed information such as the relationship between variation of water amount and rainfalls. We also make consideration, based on the results of rainfall and failure experiments against indoor model slopes. ③Developing on-site monitoring systems for slope stability monitoring 　At the on-site fields in Kiyomizu-dera Temple and Awaji Island, we have built the sensor network that detect water amount in the slopes, and operate the slope stability monitoring system based on the detection results and rainfall observation data. We have demonstrated durability of each sensor and long-term stability of the system. ④Representing slope failure phenomena with numerical simulation 　I am working with numerical simulation with SPH (Smoothed Particles Hydrodynamics) appropriate to representation of great deformation phenomena such as slope failure. In addition, I have conducted FEM and DEM simulations, and have been multidirectionally evaluating slope failure phenomena.

Present specialized field
Geotechnical Engineering (Keyword：Geotecyhnical Engineering,Construction Engineering, Terramechanics)

Books
1.	1994	Advanced construction engineering │ (Co-authored)

Papers
1.	2015/11	A method for judging the risk of slope failure based on precipitation and soil moisture characteristics │ Proc. of the fifth Int. Conf. on Geotechnique, Construction, Materials and Environment │ ,pp.448-453 (Co-authored)
2.	2015/11	Characteristics of groundwater movement at a hillslope above Kiyomizu-dera Temple, an important cultural asset │ Proc. of the 15th Asia Regional Conf. of ICSMFE │ ,pp.6 pages (Co-authored)
3.	2015/11	Characteristics of pore subsurface water movements in soil layers on the hillslope behind Kiyomizu Temple │ Proc. of the fifth Int. Conf. on Geotechnique, Construction, Materials and Environment │ ,pp.459-464 (Co-authored)
4.	2015/11	Effect of rice straw length on mechanical properties of quick lime and rice husk ash stabilized soil │ Proc. of the fifth Int. Conf. on Geotechnique, Construction, Materials and Environment │ ,pp.159-164 (Co-authored)
5.	2015/11	Effect of soil moisture conditions on seismic stability of embankment slope │ Proc. of the fifth Int. Conf. on Geotechnique, Construction, Materials and Environment │ ,pp.442-447 (Co-authored)
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Winning science prize
1.	2005	ISTVS: Int. Society for Terrain Vehicle System 15th Int. Conf. of ISTVS Best Session Paper Award
2.	2004	ISTVS: Int. Society for Terrain Vehicle System The ISTVS Asia-Pacific Conf. Best Session Paper Award
3.	2002	ISTVS 14th Int. Conf. of ISTVS Best Session Paper Award

Acquisition patent
1.		弾性体を利用した孔内載荷試験装置（特許第2571419号）