A New Method of Stress Analysis in Hillslopes Considering Vegetation Effects Using Poroelasticity

• WU, Ying-Hsin

• NAKAKITA, Eiichi

抄録

This study presents a new methodology of stress analysis for a steep and vegetated hillslope. A hillslope is modelled as a poroelastic medium under influences of vegetation surcharge on the surface and root-reinforcement inside. Tree-growth allometric equations are used for quantitative modelling of transient tree surcharge and root-reinforcement. Poroelasticity is used for evaluating stress equilibrium inside the slope of any geometry under given conditions of groundwater flow and vegetation forcing. Then, Mohr-Coulomb failure theory is applied to find the unstable zones. The three parts above are numerically solved by using the finite element method. We performed case study of saturated hillslopes in different two-dimensional geometries. The results testified this method can assess the stability of vegetated hillslope in any two-dimensional geometry.

収録刊行物

• 京都大学防災研究所年報. B = Disaster Prevention Research Institute Annuals. B

  京都大学防災研究所年報. B = Disaster Prevention Research Institute Annuals. B 60 (B), 654-663, 2017-09

  京都大学防災研究所

キーワード

• vegetation
• poroelasticity
• Mohr-Coulomb theory
• finite element analysis
• stress field
• slope stability

詳細情報

• CRID: 1050564285808153344
• NII論文ID: 120006401671
• NII書誌ID: AN00027784
• ISSN: 0386412X
• HANDLE: 2433/229364
• Web Site: http://hdl.handle.net/2433/229254
• 本文言語コード: en
• 資料種別: departmental bulletin paper
• データソース種別:
  • IRDB
  • CiNii Articles