KYOKOWA Hiroyuki

写真a

Affiliation Department

社会工学類 環境都市分野
社会工学専攻 環境都市分野

Contact information

Contact information

Homepage

https://kyokawa-lab.web.nitech.ac.jp/

External Link

Degree

  • Engineering ( 2011.03   Nagoya Institute of Technology )

Research Interests

  • Constitutive model

  • Geomaterials

  • Expansive soil

  • Numerical simulation

  • Element test

Research Areas

  • Social Infrastructure (Civil Engineering, Architecture, Disaster Prevention) / Disaster prevention engineering

  • Social Infrastructure (Civil Engineering, Architecture, Disaster Prevention) / Civil engineering material, execution and construction management

  • Social Infrastructure (Civil Engineering, Architecture, Disaster Prevention) / Geotechnical engineering

From School

  • Nagoya Institute of Technology   Graduate School   Architecture & Civil Engineering   Graduated

    2008.04 - 2011.03

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  • Nagoya Institute of Technology   Graduate School   Architecture & Civil Engineering   Graduated

    2006.04 - 2008.03

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  • Nagoya Institute of Technology   Department of Civil Engineering   Graduated

    2002.04 - 2006.03

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External Career

  • Nagoya Institute of Technology   Graduate School of Engineering Nagare College   Associate Professor

    2022.09

  • The University of Tokyo   The Graduate School of Engineering Department of Civil Engineering   Assistant Professor (Lecturer)

    2022.01 - 2022.08

  • The University of Tokyo   Department of Civil Engineering, Faculty of Engineering   Assistant Professor

    2017.02 - 2021.12

  • KAJIMA CORPORATION   Advanced Analysis Department, Civil Engineering Design Division

    2014.04 - 2017.01

  • Norwegian University of Science and Technology   Visiting Researcher

    2013.03 - 2013.10

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Professional Memberships

  • Japanese Society of Civil Engineering

    2007.04

  • Japanese Geotechnical Society

    2006.04

 

Papers

  • Water and soil particle movement in unsaturated bentonite with constrained and free swelling boundaries Reviewed

    Hailong Wang, Yuka Yamamoto, Hiroyuki Kyokawa, Daichi Ito, Hideo Komine

    Soils and Foundations   63 ( 4 )   101350 - 101350   2023.08

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    Publishing type:Research paper (scientific journal)   Publisher:Elsevier BV  

    DOI: 10.1016/j.sandf.2023.101350

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  • Experimental investigation of local chemo-mechanical behaviour and temporal development of osmotic consolidation in expansive clay Reviewed

    Misa Hiraga, Hiroyuki Kyokawa, Junichi Koseki

    Canadian Geotechnical Journal   2023.05

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:CANADIAN SCIENCE PUBLISHING  

    A series of one-dimensional cation infiltration tests under different drainage/infiltration conditions, infiltration times, ion concentrations (Na+), and vertical stresses were performed to comprehensively understand the osmotic consolidation of bentonite. The local behaviour of the specimen was captured on a digital camera through a transparent acrylic oedometer ring by tracking the movements of the marker sands on the side of the specimen. The Na+ concentration of the pore fluid throughout the specimen was measured after the test to investigate the spatiotemporal relationships between consolidation behaviour and cation infiltration. In the initial period of infiltration, the pore water pressure measured at the undrained bottom increased. A local swelling behaviour inside the specimen was observed during osmotic consolidation. The low permeability of expansive soils obstructs osmotically induced water drainage from the interlayer space of the expansive clay mineral, especially in regions far from the drainage boundary. This transition of pore water pressure affects the local mechanical behaviour; the dissipation of pore water pressure is followed by settlement. Therefore, the process of osmotic consolidation is totally longer than that of pure mechanical consolidation.

    DOI: 10.1139/cgj-2021-0568

    Web of Science

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  • Liquefaction characteristics in triaxial tests under various gravity environments – DEM analyses Reviewed

    Masahide Otsubo, Sanjei Chitravel, Reiko Kuwano, Hiroyuki Kyokawa, Junichi Koseki

    Computers and Geotechnics   156   105245 - 105245   2023.04

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    Publishing type:Research paper (scientific journal)   Publisher:Elsevier BV  

    DOI: 10.1016/j.compgeo.2023.105245

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  • A new index for the strength analysis and prediction of cement-mixed soils Reviewed

    Tuan A. Pham, Hiroyuki Kyokawa, Junichi Koseki, Daniel Dias

    EUROPEAN JOURNAL OF ENVIRONMENTAL AND CIVIL ENGINEERING   27 ( 4 )   1512 - 1534   2023.03

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:TAYLOR & FRANCIS LTD  

    In geotechnical projects involving soft soils, cement-mixed soils are an excellent way to improve the mechanical behaviour and engineering performance of soils. The water-to-cement ratio, cement content, and porosity are the most critical parameters impacting the strength of cement-mixed soils, but their effects are less well understood. The proportional influence of cement amount, porosity, and moisture content on cement-mixed soil strength is investigated in this research. The results showed that as the water-to-cement ratio increases, the influence of cementation and porosity on unconfined compressive strength decreases. The blended volume ratio is proposed as a new and adequate index for evaluating cement-mixed soil strength based on the experimental results. The blended volume ratio is the product of the void/cement volume ratio and the water/cement volume ratio. While the current index has not fully addressed the important effects of the water-to-cement ratio and porosity, the blended volume ratio allows describing the concurrent influences of porosity, cement amount, and water amount on the strength development. The experimental results showed that the cement-mixed soil strength is a function of the blended volume ratio. An empirical equation based on the blended volume ratio was then proposed for predicting the strength of cement-mixed soils. The validation of the proposed equation is verified by strength analysis for several different test data sets. A good agreement between measured and predicted results indicated that the proposed model is applicable to predict well the strength of cement-mixed soils.

    DOI: 10.1080/19648189.2022.2086929

    Web of Science

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  • VERIFICATION ANALYSIS ON DYNAMIC CENTRIFUGAL MODEL TEST OF AN ABUTMENT WITH EPS BACKFILL Reviewed

    Tsuyoshi NISHI, Tsuyoshi TORII, Tatsuro KUBOTA, Hiroyuki KYOKAWA, Junichi KOSEKI and Takeharu KONAMI

    37   2022.12

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

  • Experimental investigation of local chemo-mechanical behaviour and temporal development of osmotic consolidation in expansive clay Reviewed

    Misa Hiraga, Hiroyuki Kyokawa and Junichi Koseki

    Canadian Geotechnical Journal   2022.11

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: https://doi.org/10.1139/cgj-2021-0568

  • VERIFICATION ANALYSIS ON DYNAMIC CENTRIFUGAL MODEL TEST OF AN ABUTMENT WITH EPS BACKFILL

    NISHI Tsuyoshi, TORII Tsuyoshi, KUBOTA Tatsuro, KYOKAWA Hiroyuki, KOSEKI Junichi, KONAMI Takeharu

    Geosynthetics Engineering Journal   37   77 - 84   2022.10

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    Language:Japanese   Publisher:Japan Chapter of International Geosynthetics Society  

    According to a dynamic centrifugal model test of an abutment with EPS backfill, it has been reported a large force caused by collision of slabs acts on the abutment during an earthquake. This report presents the results of a 3-dimensional FEM analysis to confirm this phenomenon and to evaluate the effect of the force on the abutment. As a result, it was confirmed: the force acting on the abutment by the slabs is generated when the inertial force is directed to the back of the abutment; the behavior is similar to that of the past test; the effect of the action on the abutment was greater due to the inertial force than the earth pressure; and replacing the slabs with EPS partly is effective in mitigating the force acting on the abutment.

    DOI: 10.5030/jcigsjournal.37.77

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  • Linking inherent anisotropy with liquefaction phenomena of granular materials by means of DEM analysis Reviewed

    Masahide Otsubo, Sanjei Chitravel, Reiko Kuwano, Kevin J. Hanley, Hiroyuki Kyokawa, Junichi Koseki

    Soils and Foundations   62 ( 5 )   101202 - 101202   2022.10

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Elsevier BV  

    DOI: 10.1016/j.sandf.2022.101202

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  • Mechanical Behaviour and Stress-Strain Recovery Characteristics of Expanded Polypropylene Reviewed

    Z. Maqsood, J. Koseki, H. Kyokawa

    Geosynthetics International   2022.09

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1680/jgein.21.00061

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  • A new index for the strength analysis and prediction of cement-mixed soils Reviewed

    Pham, A. T., Kyokawa, H., Koseki, J. and Dias, D.

    European Journal of Environmental and Civil Engineering   2022.06

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: https://doi.org/10.1080/19648189.2022.2086929

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Misc

  • Constitutive modeling of slaking phenomena and deformation behavior

    59   599 - 606   2014

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    Language:Japanese  

    CiNii Articles

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  • Experimental study on the slaking phenomena and deformation behavior

    59   607 - 614   2014

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    Language:Japanese  

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  • 地盤工学会論文賞(和文部門)を受賞して

    京川 裕之, 菊本 統, 中井 照夫

    60 ( 8 )   36 - 36   2012.08

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    Language:Japanese   Publisher:地盤工学会  

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    CiNii Books

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  • Comprehensive modeling of the water retention curve considering the influences of suction histories, void ratio and temperature

    12   343 - 352   2009

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  • An elasto-plastic constitutive model for unsaturated soil unified considering the relation between suction, degree of saturation and density

    12   331 - 342   2009

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Presentations

  • Constitutive model of expansive soft rock considering cementation and swelling nature International conference

    Hiroyuki Kyokawa

    17th Asian Regional Conference on Soil Mechanics and Geotechnical Engineering 2023  2023.08  the International Society for Soil Mechanics and Geotechnical Engineering (ISSMGE)

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    Event date: 2023.08

    Language:English   Presentation type:Poster presentation  

    Venue:Astana   Country:Kazakhstan  

  • Influence of cation exchange on crystalline swelling and its modeling

    Hiroyuki Kyokawa

    2023.07 

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    Event date: 2023.07

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  • Changes in microstructural and mechanical properties of pyritic mudstone due to H2O2 oxidation

    Shotaro Hijikata

    2023.07 

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    Event date: 2023.07

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  • Analytical interpretation of swelling behavior of air-dried bentonite using double structure model based on mineral crystal phenomena International conference

    Hiroyuki Kyokawa

    9th International Congress on Environmental Geotechnics (ICEG2023)  2023.06  the International Society for Soil Mechanics and Geotechnical Engineering (ISSMGE)

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    Event date: 2023.06

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Chania   Country:Greece  

    DOI: https://doi.org/10.53243/ICEG2023-98

  • VERIFICATION ANALYSIS ON DYNAMIC CENTRIFUGAL MODEL TEST OF AN ABUTMENT WITH EPS BACKFILL

    2022.12 

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    Event date: 2022.12

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  • CAD/CAEと3D プリンターを用いた橋梁模型製作による演習型授業 ~理論と実践に橋を架ける~

    菊地由佳

    2022.09  公益社団法人土木学会

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    Event date: 2022.09

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:京都   Country:Japan  

  • Constitutive model of expansive soils considering the influence of the cation exchange on osmotic pressure International conference

    15th World Congress on Computational Mechanics (WCCM-XV); 8th Asian Pacific Congress on Computational Mechanics (APCOM-VIII) 

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    Event date: 2022.07 - 2022.08

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Yokohama   Country:Japan  

  • 結構造と膨張性を考慮した軟岩の構成モデル

    京川裕之

    第57回地盤工学研究発表会  2022.07  公益社団法人 地盤工学会

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    Event date: 2022.07

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:新潟   Country:Japan  

  • 異なる重力環境下での液状化挙動に関するDEM 解析

    大坪正英

    第57回地盤工学研究発表会  2022.07  公益社団法人 地盤工学会

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    Event date: 2022.07

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:新潟   Country:Japan  

  • 模擬膨張性土の種々条件下における膨潤挙動の再現解析

    武藤康博

    第57回地盤工学研究発表会  2022.07  公益社団法人 地盤工学会

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    Event date: 2022.07

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:新潟   Country:Japan  

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Awards

  • 令和4年度かけはし賞 受賞者

    2022.10   土木学会   CAD/CAEと3Dプリンターを用いた橋梁模型製作による演習型授業~理論と実践に橋を架ける~

    菊地 由佳、大野 元寛、京川 裕之、大岩 敬太、蘇 迪、高橋 佑弥、渡邉 健治

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  • Prize for technological development

    2020   Japan Society of Dam Engineers  

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  • Prize for excellent presentation in 53rd conference of Japanese Geotechnical Society

    2018   Japanese Geotechnical Society  

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  • Prize for excellent presentation in 70th conference of Japanese Society of Civil Engineering

    2015   Japanese Society of Civil Engineering  

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  • Prize for excellent presentation in 49th conference of Japanese Geotechnical Society

    2014   Japanese Geotechnical Society  

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  • Best Research Paper Award

    2012   Japanese Geotechnical Society   Description of stress-induced anisotropy of soils by modified stress within an Isotropic hardening elastoplastic model

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  • Prize for excellent presentation in 46th conference of Japanese Geotechnical Society

    2011   Japanese Geotechnical Society  

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  • Prize for excellent presentation in 42nd conference of Japanese Geotechnical Society

    2007   Japanese Geotechnical Society  

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Scientific Research Funds Acquisition Results

  • オゾンによる地盤の酸化促進実験と反応予測マルチフィジックス解析

    Grant number:23K17771  2023.06 - 2026.03

    日本学術振興会  科学研究費助成事業  挑戦的研究(萌芽)

    京川 裕之

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    Grant amount:\6240000 ( Direct Cost: \4800000 、 Indirect Cost:\1440000 )

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  • 膨張性地山におけるトンネル・切土の乾湿・水質変化に伴う進行性変状メカニズムの解明

    Grant number:22H01584  2022.04 - 2025.03

    日本学術振興会  科学研究費助成事業 基盤研究(B)  基盤研究(B)

    京川 裕之

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    Grant amount:\17680000 ( Direct Cost: \13600000 、 Indirect Cost:\4080000 )

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  • 乾湿に伴うコンクリート中の低結晶性水和物の結晶構造の変化の解明

    Grant number:22H01637  2022.04 - 2025.03

    日本学術振興会  科学研究費助成事業 基盤研究(B)  基盤研究(B)

    五十嵐 豪

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    Grant amount:\17550000 ( Direct Cost: \13500000 、 Indirect Cost:\4050000 )

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  • Measurement of shear properties of granular media under extremely low confining stress states aiming at drastic innovation of modelling of liquefaction characteristics of sands

    Grant number:20K20538  2020.07 - 2023.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Challenging Research (Pioneering)  Challenging Research (Pioneering)

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    Grant amount:\25740000 ( Direct Cost: \19800000 、 Indirect Cost:\5940000 )

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  • Simulation of the life of embankments from the construction process through the long-term in-service period to deformation and failure

    Grant number:19H00780  2019.04 - 2023.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (A)  Grant-in-Aid for Scientific Research (A)

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    Grant amount:\45760000 ( Direct Cost: \35200000 、 Indirect Cost:\10560000 )

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Other External Funds

  • 黄鉄鉱含有泥岩の酸化に伴う間隙構造と力学特性変化の解明

    2023.04 - 2024.03

    (一社)中部地域づくり協会  令和5年度 中部地域づくり協会研究助成事業 

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    Authorship:Principal investigator  Grant type:Competitive

    Grant amount:\996000 ( Direct Cost: \996000 )

  • 粘土鉱物の結晶表面現象に着目した膨張性地山の盤ぶくれメカニズムの解明

    2021.04 - 2022.03

    一般社団法人 上田記念財団  上田記念財団助成 

    京川裕之

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    Grant amount:\2000000 ( Direct Cost: \1840000 、 Indirect Cost:\160000 )

 

Committee Memberships

  • International Society for Soil Mechanics and Geotechnical Engineering   Nominated Member in Technical Committee on Energy Geotechnics (TC308)  

    2023.06   

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    Committee type:Academic society

  • 公益社団法人地盤工学会中部支部   企画委員会 委員  

    2023.04   

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    Committee type:Academic society

  • 中日本高速道路株式会社   のり面委員会 委員  

    2023.04   

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    Committee type:Other

  • 公益社団法人地盤工学会中部支部   セミナー部会 会員  

    2023.04   

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    Committee type:Academic society

  • 公益社団法人地盤工学会中部支部   若手技術者の会 会員  

    2023.04   

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    Committee type:Academic society

  • 公益社団法人土木学会   土木学会論文集編集委員会(部門C小委員会)委員  

    2018.06 - 2020.05   

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    Committee type:Academic society

  • 公益社団法人土木学会   Puebla地震(Mexico)による被害調査(土木学会地震工学委員会・地盤被害調査小委員会)  

    2017   

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    Committee type:Academic society

  • 公益社団法人地盤工学会   地盤工学会誌編集委員会委員  

    2014.06 - 2016.05   

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    Committee type:Academic society

  • 公益社団法人地盤工学会   アカデミックロードマップと発展史・人物史」の委員会(数値解析・構成式)委員  

    2012.04 - 2014.03   

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    Committee type:Academic society