SUETSUGU Daisuke

写真a

Affiliation

Engineering educational research section Department of Civil and Environmental Engineerring Program

Title

Professor

External Link

Degree 【 display / non-display

  • Doctor of Engineering ( 2004.6   Kyushu University )

  • Master of Engineering ( 1997.3   Kyushu University )

Research Areas 【 display / non-display

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

 

Papers 【 display / non-display

  • Evaluation of base course consisting of soil bags filled with fine-grained soil using the dynamic cone penetration test Reviewed

    Fukubayashi Y., Koyama A., Suetsugu D.

    E3S Web of Conferences   368   2023.2

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:E3S Web of Conferences  

    In African countries, in order to improve the trafficability of earth and gravel road, locally available material-based and labour-based approach are regarded as one of the most practical measures. As one of the approaches, a base course reinforcement method using Do-nou, which is the Japanese term for soil bag, had been developed. In this study, the bearing capacity of base course built with Do-nou has been examined through the Dynamic Cone Penetration tests (DCP). The series of full-size driving tests have been conducted with varying base structures and compaction methods. The results of the DCP tests show that, only in the case of Do-nou reinforcement base with manual compaction, the strength distribution balance at the part of base course and subgrade within 800 mm in depth from surface was shifted from average to well after being subjected to traffic load. In the other two cases, the balance remained average. It presents that by reinforcing soil material with Do-nou bags, the base course compacted manually keeps the sufficient bearing capacity and well-balanced strength profile in depth comparing with those conventionally designed and constructed with equipment.

    DOI: 10.1051/e3sconf/202336802030

    Scopus

  • 日南層群分布域の道路斜面の動態観測と地下水位推定による地すべり挙動の検討 Reviewed

    伊集院 弘尚, 福林 良典, 神山 惇, 末次 大輔

    地盤工学会災害調査論文報告集   1 ( 1 )   121 - 137   2023

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    Authorship:Last author   Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:公益社団法人 地盤工学会  

    イモ洗いのニホンザルが生息する宮崎県串間市の幸島から,南へ2.0kmほど国道448号を南下した箇所で,令和2年7月豪雨により路側構造物や道路に変状をきたす道路災害が発生した。当該箇所は,平成22年(2010年)から現在に至るまで,数回にわたり被災・復旧を繰り返している箇所であり国道448号の道路管理上の要ともいえる場所である。令和2年7月豪雨においては,擁壁の増し打ちアンカーの抜け出し,擁壁の傾倒・沈下,道路のクラック等の変状が確認され,全面通行止めによる通行規制が数か月間に渡り実施された。人的被害の発生は免れたものの,地域経済や観光業,緊急輸送道路としての機能に少なからず影響を与え,地域住民の生活に大きな制限を強いたことは言うまでもない。本事例報告においては,過去に発生した被災状況及び令和2年7月豪雨で発生した被災状況を紹介しながら,地盤工学的観点から,同じ箇所で繰り返し発生する道路災害防止に関しての1つの考えを述べるものである。

    DOI: 10.11512/jgsdr.1.1_121

    CiNii Research

  • 宮崎県西米良村における国道219号線での道路盛土の崩壊と復旧工 Reviewed

    神山 惇, 福林 良典, 伊集院 弘尚, 末次 大輔

    地盤工学会災害調査論文報告集   1 ( 1 )   115 - 120   2023

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    Authorship:Last author   Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:公益社団法人 地盤工学会  

    令和2年7月豪雨により,宮崎県西米良村にある国道219号の道路盛土が崩壊した。当該現場は令和元年台風17号においても同様な被害が生じている。本稿では,令和2年7月豪雨における当該現場での被災状況調査結果について報告するとともに,過去の豪雨による被害事例について述べる。そして,今回の被害を受け設計,施工されている復旧工の様子を示す。

    DOI: 10.11512/jgsdr.1.1_115

    CiNii Research

  • Field experiment of vibration characteristics of lightweight embankments converted from bridges using rigid polyurethane foam-filling under traffic load Reviewed

    Koyama A., Akira Y., Mitabe H., Fukubayashi Y., Suetsugu D.

    Case Studies in Construction Materials   18   2022.12

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    Authorship:Corresponding author   Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:Case Studies in Construction Materials  

    The method of filling the lower space of a bridge with rigid polyurethane foam (RPU foam) to reduce the traffic load along with seismic reinforcement has rarely been applied to extend the life of bridges in Japan. This study evaluates the reinforcement effect and change in the vibration characteristics of a bridge converted into a lightweight embankment by RPU foam filling. A truck was driven on the bridge before and after the RPU foam filling. The vibration and strain of the slab were found to have reduced at the span center. When a traffic load was applied, the predominant frequency inside the RPU foam was ∼5 Hz, and long-period vibrations relative to the slab were confirmed.

    DOI: 10.1016/j.cscm.2022.e01756

    Scopus

  • 粘性土中に打設される木杭の鉛直支持力に及ぼす杭形状の影響 Reviewed

    末次 大輔, 那須 龍斗, 神山 惇, 福林 良典

    土木学会論文集E2(材料・コンクリート構造)   77 ( 5 )   I_77 - I_83   2022.3

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    Authorship:Lead author, Corresponding author   Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: https://doi.org/10.2208/jscejmcs.77.5_I_77

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Books 【 display / non-display

  • Q&Aでわかる土木と木材

    末次大輔,他( Role: Contributor ,  第7章)

    (公社)土木学会  2023.3  ( ISBN:9784844609186

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    Language:Japanese Book type:Scholarly book

  • 土質力学

    安福 規之 , 石藏 良平 , 大嶺 聖, 笠間 清伸 , 酒匂 一成 , 蒋 宇静 , 末次 大輔 , 杉本 知史 , 林 泰弘 ( 工学), 福林 良典 , 松原 仁 , 椋木 俊文 , 村上 哲 , 山本 健太郎 ( Role: Contributor ,  第6章,他)

    理工図書  2022.9  ( ISBN:9784844609186

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    Language:Japanese Book type:Scholarly book

    CiNii Books

  • 熊本地震被災構造物の復旧に関する調査研究

    末次大輔,他( Role: Contributor)

    地盤工学会九州支部  2023.1 

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    Language:Japanese Book type:Report

  • Evaluation of the Performance of Gravel Road with Base Course Reinforced with Do-Nou

    Fukubayashi Y., Sato S., Koyama A., Suetsugu D.( Role: Sole author)

    Sustainable Civil Infrastructures  2021 

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    Language:Japanese Book type:Scholarly book

    In developing countries, improvement of trafficability of rural roads, which are generally earth or graveled, are crucial for rural development. Under the circumstances with financial constraints of those countries, locally available material-based approach towards improvement of trafficability are regarded as one of the practical measures. Do-nou, which is Japanese term for soilbag, have been utilized for reinforcing base course. Do-nou method is requiring only labor even for compaction of base material and used polyester fiber woven bags for crops, fertilizer, etc. as one of geotextile. In 29 countries of Asia, Africa and the Pacific, about 180 km rural road has been improved using the Do-nou method, by the NGO which one of the authors is belong to. Because of the easiness and effectiveness of Do-nou method, it enables minor and small enterprises, generally operated by the youth, to be involved in road construction implemented by public works. In order to improve trafficability of rural roads while solving social problem, high unemployment rate among the youth in developing countries, the method needs to be adopted by road authorities for further extension. In this study, therefore, the performance of gravel road with base course consist of Do-nou have been evaluated through the series of full-size driving tests. The settlement of road surfaces with conventionally designed base course and with that consist of Do-nou with the same thickness subjected to the traffic load were measured and compared. Dynamic cone penetration index of these base course structure was also compared. Load distribution effects were also examined using earth pressure gages located on subgrade and road surface during driving tests. The mechanism of reducing settlement of road surface with Do-nou base course were verified. The performance of base course with Do-nou are defined in comparison to conventional base course structure, which enable road authorities adopt Do-nou method.

    DOI: 10.1007/978-3-030-62586-3_4

    Scopus

  • 熊本地震による地盤構造物の被害分析および復旧に関する調査研究

    末次大輔( Role: Sole author)

    (公社)地盤工学会九州支部  2020.1 

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    Total pages:253   Responsible for pages:1-3   Language:Japanese Book type:Report

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  • 塩水浸透劣化に伴うセメント処理土の強度特性の変化

    井上徹郎、末次大輔

    第54回地盤工学研究発表会講演概要集   581 - 582   2020.7

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    Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (scientific journal)   Publisher:(公社)地盤工学会  

  • ネパール国における蛇籠擁壁の健全性評価

    原忠,柴原隆,西剛整,中澤博志,木村瞬,末次大輔,下村昭司,西村義幸

    第54回地盤工学研究発表会講演概要集   1583 - 1584   2020.7

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    Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (scientific journal)   Publisher:(公社)地盤工学会  

  • 令和元年8月豪雨により決壊した佐賀県小城市のため池被災調査報告

    工藤啓幹,神山惇,末次大輔,藤本哲生

    令和元年度土木学会西部支部研究発表会講演概要集   331 - 332   2020.3

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    Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (scientific journal)   Publisher:(公社)土木学会西部支部  

  • 熊本地震による土構造物の被災状況と被害軽減への課題

    末次大輔

    2020 全建宮崎   ( 55 )   5 - 8   2020.3

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    Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (other)   Publisher:宮崎県建設技術協会  

  • 蛇籠金網の引張強度特性に関する基礎的検討

    中澤博志,栗原裕之,中村有志,末次大輔,原忠

    第74回年次学術講演会講演概要集   III-487   2019.9

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    Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (scientific journal)   Publisher:(公社)土木学会  

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Presentations 【 display / non-display

  • 有機質系固化材を使用した固化処理土の海水による劣化

    笠師楽多朗 , 安井賢太郎 , 原 弘行,末次 大輔

    令和4年度 土木学会西部支部研究発表会  2023.3.4 

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    Event date: 2023.3.4

    Language:Japanese   Presentation type:Oral presentation (general)  

  • 粘土地盤中の丸太継杭の鉛直支持力に及ぼす杭形状の影響

    那須龍斗, 末次大輔, 神山 惇,福林良典

    令和4年度 土木学会西部支部研究発表会  2023.3.4 

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    Event date: 2023.3.4

    Language:Japanese   Presentation type:Oral presentation (general)  

  • 谷地形に造成されたため池堤体への降雨浸透挙動の解明に関する研究

    川野純也,神山 惇 ,末次大輔,福林良典, 藤本哲生

    令和4年度 土木学会西部支部研究発表会  2023.3.4 

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    Event date: 2023.3.4

    Language:Japanese   Presentation type:Oral presentation (general)  

  • 谷地形を有する模型ため池堤体の降雨浸透実験

    神山 惇 ・ 末次 大輔 ・ 福林 良典 ・ 田中 健介 ・ 藤本 哲生

    令和3年度土木学会西部支部研究発表会  2022.3.5 

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    Event date: 2022.3.5

    Language:Japanese   Presentation type:Oral presentation (general)  

  • 軟弱粘土地盤に打設される木杭の鉛直支持力に及ぼす杭形状の影響

    那須龍斗、末次大輔、神山惇、福林良典

    第20回木材工学研究発表会  2021.9.30 

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    Event date: 2021.9.29 - 2021.9.30

    Language:Japanese   Presentation type:Oral presentation (general)  

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Grant-in-Aid for Scientific Research 【 display / non-display

  • 沿岸部軟弱地盤地帯におけるセメント混合処理地盤の健全度評価手法の開発

    Grant number:21K04258  2021.04 - 2024.03

    独立行政法人日本学術振興会  科学研究費補助金  基盤研究(C)

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    Authorship:Principal investigator 

  • 沿岸部軟弱粘土地盤地帯における深層混合処理地盤の長期耐久性の解明

    Grant number:18K04348  2018.04 - 2023.03

    科学研究費補助金  基盤研究(C)

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    Authorship:Principal investigator 

    セメントならびに石灰処理土はカルシウムの溶脱に伴い徐々に軟弱化する。軟弱化の速さは地下水中(海水中)のマグネシウム濃度に依存する。沿岸部の軟弱粘土地盤地帯で施工された既設のセメント処理地盤の長期的な安定性の評価方法は確立されておらず,軟弱化による力学的不安定化メカニズムの解明が必要である。本研究では,セメント混合処理土と周辺地盤との相互作用に着目することにより,処理土-粘土間の海水の浸透特性ならびに処理土-粘土間の軟弱化に伴う力学的相互作用の変化を明らかにする。