2019 - 2023 Study on the formation and expansion of subsurface cavity due to internal erosion and evaluation of potential risk of ground cave-in
2019 - 2022 Development of 4G soil testing system with NI-NC measurement
2017 - 2019 Experimental and numerical assessment of sinkhole formation and evaluation of cavity growth
2016 - 2018 Study on microscopic mechanisms inducing shear failure behavior of geo-materials using high-accuracy AE measurements
2015 - 2018 Risk assessment associated with geotechnical problems Pokhara City, Nepal
2014 - 2018 Evaluation of earth structure deterioration due to internal erosion
2013 - 2017 Risk evaluation and early warning for slope disaster induced by earthquake and rainfall
2010 - 2014 Efficient maintenance technology with a reliable evaluation of earth structure deterioration
2008 - 2009 微生物機能を利用した既存土構造物の耐災性向上技術の評価手法の開発
2007 - 2009 Development of efficient construction, maintenance and renewal methods to reduce life cycle cost of buried pipes
2004 - 2004 国際シンポジウムIS-Georgiaの企画とTC29国際連携研究
2002 - 2002 地盤材料の変形特性に関するTC29国際連携研究
2000 - 2001 硬質地盤材料の変形特性の除荷過程での時間効果の観測とモデル化
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Papers (95):
Sanjei Chitravel, Masahide Otsubo, Reiko Kuwano. The effect of suffusion on small strain shear modulus of gap-graded soil under principal stress rotation. Soils and Foundations. 2024. 64. 6. 101518-101518
Sanjei Chitravel, Masahide Otsubo, Reiko Kuwano. Hydro-mechanical response of volcanic ash on removal of fines: Shear stiffness to critical state mechanics. Soils and Foundations. 2024. 64. 4. 101478-101478
Masahide Otsubo, Yang Li, Reiko Kuwano. Sensitivity of G0 and stress-strain relation of geomaterials to grain shape and surface roughness. E3S Web of Conferences. 2024. 544. 05006-05006
Itsuki Sato, Reiko Kuwano, Masahide Otsubo. Contractancy and shear behavior of extremely loose structure soils with particle breakage in saturated and unsaturated conditions. E3S Web of Conferences. 2024. 544. 14008-14008
Junming Liu, Masahide Otsubo, Reiko Kuwano. Characterization of soil stiffness anisotropy at small strains based on phase velocities of shear waves measured by novel testing apparatus. E3S Web of Conferences. 2024. 544. 01008-01008
Experimental Investigation on Mechanism of Internal Erosion and Development of Underground Cavities
(7th International Symposium on Deformation Characteristics of Geomaterials, IS Glasgow2019, 2019)
2020/03 - Japan Geotechnical Society Distinguished contribution award
2010/05 - Japan Geotechnical Society Best Paper Award Aging effects on small strain shear moduli and liquefaction properties of in-situ frozen and reconstituted sandy soils
Association Membership(s) (4):
Womens Society of Civil Engineers
, JAPAN SOCIETY OF DAM ENGINEERS
, THE JAPANESE GEOTECHNICAL SOCIETY
, JAPAN SOCIETY OF CIVIL ENGINEERS