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Development of reinforcement work for forest revegetation on steep slopes

Research Project

Project/Area Number 03556020
Research Category

Grant-in-Aid for Developmental Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field 林学
Research InstitutionTokyo University of Agriculture and Technology

Principal Investigator

TSUKAMOTO Yoshinori  Tokyo Univ.of Agric.& Tech.Dept.on Environmental Science and Ntural Resources Prof., 農学部, 教授 (60014924)

Co-Investigator(Kenkyū-buntansha) FUKUNAGA Kenji  Tokyo Univ.of Agric.Dept.of Forestry Assist.Prof., 農学部, 助手 (30147475)
YAMADERA Yoshinari  Tokyo Univ.of Agric.Dept.of Forestry Assoc.Prof., 農学部, 助教授 (60078144)
KUBOTA Jumpei  Tokyo Univ.of Agric.& Tech.Dept.on Env.Sci.& Nat.Resour.Assist.Prof., 農学部, 助手 (90195503)
MINEMATSU Hirohiko  Tokyo Univ.of Agric.& Tech.Dept.on Env.Sci.& Nat.Resour.Assoc.Prof., 農学部, 助教授 (60011988)
NAKAMURA Hiroyuki  Tokyo Univ.of Agric.& Tech.Dept.on Env.Sci.& Nat.Resour.Prof., 農学部, 教授 (90242239)
上村 恵也  日本道路公団, 技術部, 係長
Project Period (FY) 1991 – 1993
Project Status Completed (Fiscal Year 1993)
Budget Amount *help
¥5,900,000 (Direct Cost: ¥5,900,000)
Fiscal Year 1993: ¥1,600,000 (Direct Cost: ¥1,600,000)
Fiscal Year 1992: ¥1,800,000 (Direct Cost: ¥1,800,000)
Fiscal Year 1991: ¥2,500,000 (Direct Cost: ¥2,500,000)
KeywordsTree Root / Steep Slope / Forest / Reinforcement Effect / Modeling of Tree Root / Theoretical Analysis / 斜面 / 補強効果 / 根系分布 / 付着力 / 曲げ剛性 / 補強材 / 森林保存 / 基盤補強工 / 根系補強力 / 緑化基盤補強工法 / 表層土厚 / 根系 / 人工ネット / 緑化斜面 / 短杭
Research Abstract

This research addresses the role of forest roots for securing and reinforcing slope stability for the purpose of developing proper reinforcement work for revegetating forest on steep slopes. The results of this study are as follows ;
1) Field observation and modeling of root distribution
The effects of root distribution for slope stability are considered as the combination of lateral and vertical roots. The lateral roots protect soil surface from surface erosion like casting "nets" over soil surface. On the other hand, vertical roots reinforce slope stability like driving "short anchors" into grounds. The difference of root distribution between trees and grasses is that tree root grow toward upper slope.
2) Theoretical analysis on effects of tree roots for slope stability
The effects of tree roots for reinforcing slope stability are investigated theoretically and are evaluated quantitatively as compared with other artificial materials, like iron stakes, pipes and anchors. Tree roots have ideal morphology as reinforcing material. But there are some limitations. One is the shortage of strength as material itself. Also Tree roots are not strong enough to penetrate into firm soils. Slope stability decreases gradually along with plant growth.
3) A guide of reinforcement work for revegetating forests on steep slopes
It is obvious that tree roots have significant effects on slope stability, but there are some limitations. The combination of natural tree roots and other artificial materials are strongly advised. The method presented in this study evaluating reinforcing effects theoretically should be useful for designing proper work.

Report

(4 results)
  • 1993 Annual Research Report   Final Research Report Summary
  • 1992 Annual Research Report
  • 1991 Annual Research Report
  • Research Products

    (37 results)

All Other

All Publications (37 results)

  • [Publications] 塚本良則: "森林は斜面崩壊の抑止にどれだけ役立っているか" 森林科学. 3. 45-51 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 塚本良則・窪田順平: "斜面プロセスにおける森林の役割" 地形. 12-3. 245-257 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 中村浩之・星野和彦・奥田公也: "アンカーIにおける最適な初期定着力の設定" 地すべり. 29-1. 16-23 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 逢坂興宏・田村毅・窪田順平・塚本良則: "花崗岩斜面における土層構造の発達過程に関する研究" 新砂防. 45-3. 3-12 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 塚本良則・竹下敬司・下川悦朗・谷口義信・地頭〓隆: "平成5年豪雨による鹿児島県下の土砂災害について" 新砂防. 46-4. 23-35 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 中村浩之: "斜面補強対策工の考え方-補強土工法から杭工まで-" 第19回地すべり対策技術検討会. 43-59 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 塚本良則・小橋澄治編: "新砂防工学" 朝倉書店, 193 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Y.Tsukamoto: "Role of Forest on Slope Stability" Shinrin Kagaku. No.3. 45-51 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Y.Tsukamoto and J.Kubota: "Role of Forest in Hillslope Process" Transactions, Japanese Geomorphological Union. vol.12(3). 245-257 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] H.Nakamura, K.Hoshino and K.Okuda: "Decision of Initial Anchor Force for Prestressed Anchor" Journal of Japan Landslide Society. 29-1. 16-23 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] O.Ohsaka, T.Tamura, J.Kubota and Y.Tsukamoto: "Process Study of The Soil Stratification on Weathered Granite Slopes" Journal of the Japan Society of Erosion Control Engineering. 45-3. 3-12 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Y.Tsukamoto, K.Takeshita, E.Shimokawa, Y.Taniguchi and T.Jitouzono: "Sediment Disasters by Heavy Storms in Kagoshima in 1993" Journal of the Japan Society of Erosion Control Engineering. 46-4. 23-35 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] H.Nakamura: "Reinforcement Work on Slopes" Proceedings of Landslide Prevention. 19. 43-59 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Y.Tsukamoto and S.Kobashi (ed.): Erosion Control Engineering (New Edition). Asakura Syoten, Tokyo, 193 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 塚本 良則: "森林は斜面崩壊の抑止にどれだけ役立っているか" 森林科学. 3. 45-51 (1991)

    • Related Report
      1993 Annual Research Report
  • [Publications] 塚本良則・窪田順平: "斜面プロセスにおける森林の役割" 地形. 12-3. 245-257 (1991)

    • Related Report
      1993 Annual Research Report
  • [Publications] 中村浩之・星野和彦・奥田公也: "アンカー工における最適な初期定着力の設定" 地すべり. 29-1. 16-23 (1992)

    • Related Report
      1993 Annual Research Report
  • [Publications] 逢坂興宏・田村毅・窪田順平・塚本良則: "花崗岩斜面における土層構造の発達過程に関する研究" 新砂防. 45-3. 3-12 (1992)

    • Related Report
      1993 Annual Research Report
  • [Publications] 塚本良則・竹下敬司・下川悦朗・谷口義信・地頭薗隆: "平成5年豪雨による鹿児島県下の土砂災害について" 新砂防. 46-4. 23-35 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] 中村浩之: "斜面補強対策工の考え方-補強土工法から杭工まで-" 第19回地すべり対策技術検討会講演論文集. 43-59 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] 塚本良則・小橋澄治編: "新砂防工学" 朝倉書店, 193 (1991)

    • Related Report
      1993 Annual Research Report
  • [Publications] 逢坂 興宏: "花崗岩斜面における土層構造の発達過程に関する研究" 新砂防. 45(3). 3-12 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] 太田 猛彦: "山体地下水研究へのアプローチ" 第4回水資源に関するシンポジウム論文集. 59-70 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] 中村 浩之: "地すべり発生とその対策" 地すべり学会・地すべり地形に関する諸問題論文集. 32-50 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] 中村 浩之: "トンネル坑口周辺の斜面安定と対策" 地質と調査. 92(3). 12-17 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] 諸橋 崇: "小口径排水トンネル工法の地下水排除効果" 第31回地すべり学会研究発表講演集. 239-242 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] 中村 浩之: "地すべり対策の問題点と今後の課題" 基礎工. 11-16 (1993)

    • Related Report
      1992 Annual Research Report
  • [Publications] 塚本 良則: "環境緑化工学" 朝倉書店, 188 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] 塚本 良則: "斜面の土砂移動現象(砂防学講座)" 山海堂, 357 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] 塚本 良則,窪田 順平: "斜面プロセスにおける森林の役割" 地形. 12(3). 243-257 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] 塚本 良則: "斜面侵食防止からみた森林施業のあり方" 東京農工大学農学部演習林報告. 29. 43-54 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] 塚本 良則: "森林は斜面崩壊の抑止にどれだけ役立っているか" 森林科学. 3. 45-51 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] 峰松 浩彦,新井 雅夫: "林地保全からみた林道施設のあり方" 東京農工大学農学部演習林報告. 29. 73-80 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] 田村 毅,逢坂 興宏,窪田 順平: "花崗岩斜面における浸透・安定解析" 平成3年度・砂防学会研究発表概要集. 254-257 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] 福永 健司,山寺 喜成: "ダム原石山跡地におけ風化土層厚と植栽木の生育との関係" 第22回緑化工研究発表会要旨集. 16-19 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] 塚本 良則(編著): "新砂防工学" 朝倉書店, 193 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] 塚本 良則(共著): "環境緑化工学" 朝倉書店, 188 (1992)

    • Related Report
      1991 Annual Research Report

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Published: 1991-04-01   Modified: 2016-04-21  

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