根土复合体材料的抗剪强度特性研究进展

Research progress on shear strength characteristics of root soil composite materials

在我国经济快速发展的进程中,自然地质作用与人类工程活动产生了大量的边坡,对人民生命财产造成了极大的威胁。为了有效地解决这类灾害,国内外学者开展了大量植物护坡技术的研究。植物护坡技术是利用植物根系与土体之间的紧密缠绕,起到提高边坡土体的抗剪强度,增强边坡浅层土体稳定性的作用。论文着重从植物根系的分布、根径大小、根数和土壤含水率、干密度等方面总结草本植物与木本植物根土复合体抗剪强度的变化,分析了植物原状土与重塑土的抗剪强度特性之间的差异性,并简要论述植物加筋理论力学模型的研究现状,最后对根土复合体抗剪强度研究的发展前景提出了几点展望。

In the process of rapid economic development in China, natural geological processes and human engineering activities produce a large number of slopes, which pose a great threat to people’s lives and property. In order to solve this kind of disaster effectively, scholars at home and abroad have carried out a large number of researches on plant slope protection technology. Plant slope protection technology uses the close entanglement between plant roots and soil to improve the shear strength of slope soil and enhance the stability of shallow slope soil. This paper mainly summarizes the changes of shear strength of herbaceous plant and woody plant root soil composite from the aspects of root distribution, root diameter, root number, soil moisture content, dry density. In addition, it analyzes the differences between the shear strength characteristics of undisturbed soil and remolded soil, and briefly discusses the research status of theoretical mechanical model of plant reinforcement. Finally, some prospects for the research on shear strength of root-soil composites are put forward.