Abstract：
Research on the mechanism of plant root-soil consolidation is a current focus in research into the ecological restoration of banks. The stability of ecological banks is central to this research, and bank stability is closely related to plant combinations and spacing. Recent research on reinforced anchorage of plant roots has mainly focused on root length and angle, and on other parts of the root system, and only a few studies have examined the combination of different types of roots. In this study, a coupled slope stability assessment system is created, composed of root morphological parameters and involving calculations using the finite element model ABACUS. This paper selects the two banks of the lower reaches of the Tiantang River in the flood zone of Yongding River as the research area, and examines slope surface plants. And then the reinforcement effect of different shrub roots combinations and plant spacing are evaluated for determining the optimal shrub layout, with the aim of solving the instability problem of collapsible silty clay bank slopes and associated risks. The results indicated that when the shrub plant spacing is 0.65 m, the optimal shrub combination is Tamarix chinensis + Philadelphus incanus, and when the shrub plant spacing is 0.75 m, the optimal shrub combination is Tamarix chinensis + Euonymus alatus. The study found that the root system morphology and the fibrous roots amount at the foot of the slope can have different degrees of influence on the shallow soil stability of the silty clay slope under different shrubs plant spacing conditions.
摘要：
植物根土固结机理的研究是当前堤岸生态修复研究的热点。生态银行的稳定性是这项研究的核心，堤岸稳定性与植物组合和间距密切相关。近年来对植物根系加筋锚固的研究主要集中在根长和根角，在根系的其他部分，只有少数研究检查了不同类型根的组合。在这项研究中,建立了耦合边坡稳定性评估系统，由根系形态参数组成，涉及使用有限元模型ABACUS的计算。本文选取永定河洪泛区天塘河下游两岸为研究区,并检查斜坡表面植物。然后对不同的灌木根系组合和植物间距的加固效果进行了评估，以确定最佳的灌木布局。旨在解决湿陷性粉质粘土岸坡的失稳问题及相关风险。结果表明,当灌木株距为0.65m时,最佳的灌木组合是Tamarixchinensis和Philadelphusincanus，当灌木植物间距为0.75m时，最佳灌木组合为Tamarixchinensis和Euonymusalalatus。研究发现,在不同灌木植物间距条件下,坡脚根系形态和须根数量对粉质粘土坡面浅层土体稳定性能有不同程度的影响。
