基于应变控制的根系固土纤维束模型研究

Loess plateau is one of the most serious regions on soil and water loess in China. Plants is widely used for controlling shallow landslides. So model of root-reinforcement is basis and important for revealing the mechanism effects of slope protection by plants. This project researches strain controlled fiber bundle model of root-reinforcement on loess plateau of China. Based on the successive breakage of composite materials, the destroy pattern with respect to root-strain of root and soil matrix will be proposed during shallow landslide. With the in-situ shear test verified, the strain control fiber bundle model will be set up. Finally, stress field coupled with fiber bundle model of planted slope will be built to evaluate slope stability. In a word, the objective of this research is to develop a train controlled fiber bundle model to calculate root-reinforcement and analyze the root mechanism. The successful implement of this research could improve the Decision Support System of preventing shallow landslide hazards.

黄土高原是我国水土流失最严重的地区，植物措施广泛应用于浅表层滑坡的治理中。为揭示根系固土护坡的力学效应，需要具有实际应用价值的根系固土力学机制模型。本项目拟通过构建应变控制式的纤维束模型，研究黄土高原主要造林树种根系对土壤抗剪强度的增强作用：基于复合材料学的连续断裂理论，从根系拉伸应变角度分析在浅表层滑坡过程中根-土复合体剪切破坏方式，提出应变控制式纤维束模型，利用现场原位直接剪切试验对模型进行验证，并将理论模型运用至黄土高原边坡稳定性分析中。本项目旨在开发研究应变控制式的纤维束模型，分析根系固土的力学作用机理，为丰富我国构建防治浅表层滑坡灾害的空间决策支持系统提供理论依据。

黄土高原是我国水土流失最严重的地区，植物措施广泛应用于浅表层滑坡的治理中。为揭示根系固土护坡的力学效应，需要具有实际应用价值的根系固土力学机制模型。本项目基于复合材料学的连续断裂理论，从根系拉伸应变角度分析在浅表层滑坡过程中根-土复合体剪切破坏方式，提出应变控制式纤维束模型，研究了黄土高原主要造林树种根系对土壤抗剪强度的增强作用，并利用现场原位直接剪切试验对模型进行验证，将理论模型运用至黄土高原边坡稳定性分析中。本项目开发研究的应变控制式纤维束模型，分析了根系固土的力学作用机理，为丰富我国构建防治浅表层滑坡灾害的空间决策支持系统提供理论依据。