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在植被护坡技术中,根系对土体的加固作用是很显著的,但大多数植物根系的加固深度,尚不能达到潜在的深层滑坡的滑面埋深,所以,植被在深层滑坡防治方面的作用是有限的。基于离心模型试验研究基础上的加筋护坡技术不仅可以满足深层护坡的要求,而且经济合理。将这两种边坡防护技术相结合,从而形成了一种新型的公路边坡防护体系。首次运用断裂力学原理,分析和解释了植物根系与筋材在边坡土体剪切过程中的阻裂机理,不仅形象地揭示了根系纤维与筋材阻止裂纹发展的过程,而且借助裂纹尖端的应力强度因子,很好地解释了该防护体系对边坡稳定的贡献度。在建立几何模型的基础上,给出了防护体系抗滑力和边坡安全系数的计算公式。
In the vegetation slope protection technology, the reinforcement effect of the root system on the soil is very significant, but the depth of root reinforcement of most plants can not reach the potential deep landslide sliding depth, so the role of vegetation in deep landslide prevention and control Is limited. The reinforced slope protection technology based on the centrifugal model test not only meets the requirements of deep slope protection, but also is economical and reasonable. Combining these two kinds of slope protection technology, a new type of highway slope protection system has been formed. For the first time, the principle of fracture mechanics was used to analyze and explain the mechanism of root block and reinforcement in the cutting process of slope soil. It not only revealed the process of root fiber and reinforcement to prevent crack growth, Stress intensity factor, a good explanation of the protection system on the stability of the slope contribution. Based on the establishment of the geometric model, the formulas for calculating the slip resistance and the safety factor of the slope are given.