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生态护坡是公路建设可持续发展的要求。根据林木根系对边坡浅层加筋锚固的原理,结合现场提取刺槐根系进行试验所得的基本参数,利用有限元软件ADINA进行分析。在模拟分析过程中,根系采用弹性杆件模型,土体采用摩尔-库仑模型,从坡度的变化对整个刺槐林边坡进行模拟计算,对其应力和应变场的变化进行分析。研究结果表明,刺槐群根能改善边坡浅层土体的应力、应变场,使坡体浅层更趋稳定;边坡坡度的增加会导致坡脚应力增大、坡肩处逐渐产生拉应力及其数值逐渐增大、应变集中区的范围也扩大,此时根系护坡效果减弱。
Ecological slope protection is the requirement of sustainable development of highway construction. According to the principle of root reinforcement on the shallow slope of the slope and the basic parameters of the experiment, the analysis was carried out by using the finite element software ADINA. In the process of simulation analysis, the elastic rod model was adopted in the root system and the Mohr-Coulomb model was used in the soil. The slopes of the whole Robinia pseudoacacia forest were simulated from the change of slope, and the changes of stress and strain field were analyzed. The results show that the acacia group can improve the stress and strain field of the shallow soils, and make the superficial layer of the slope more stable. The increase of slope can lead to the increase of the stress on the slope foot and the gradual tensile stress And their values gradually increase, the scope of strain concentration area also expanded, this time the effect of root slope protection weakened.