期刊论文

A root-reinforced soil mechanics model based on the Griffith fracture criterion

中文

中南林业科技大学学报

1673-923X

2021

41

6

167-174

10.14067/j.cnki.1673-923x.2021.06.018

国家948项目（2015-4-38）； 湖南省交通科技计划项目（201803）；

本校为第一机构

【目的】土体抗剪强度增量?S是衡量植物根系固土效果的重要指标,针对目前计算?S的力学模型精度不高、计算过程复杂等问题,本论文对根系固力学模型进行改进,以期提高生态边坡稳定性分析的准确性。【方法】本文运用断裂力学与功能原理,探究植物根系破坏失效模式,提出基于Griffith断裂准则下的根系固土力学模型。选用寒旱环境下代表护坡植物霸王Zygophyllum xanthoxylon、柠条锦鸡儿Caragana korshinskii根-土复合体的直剪试验数据,采用回归分析方法分析其根径与抗拉指标间的相关性,验证根系固土力学模型的合理性、有效性。【结果】理论分析表明,植物根系对土体抗剪强度增量与根系断裂韧性Gp决定,可...

【Objective】The increase in shear strength of the soil (ΔS) is an important index to measure the effect of root system soil consolidation. Aiming at the problems of low precision and complex calculation process of the mechanical model for calculating ΔS, this paper improves the mechanical model of root system in order to improve the accuracy of ecological slope stability analysis.【Method】 Fracture mechanics and functional principles was used to explore the failure mode of plant root failure, and proposes a root soil consolidation mechanics...