多花木兰根系抗拉特性及边坡稳定性分析

发布时间：2018-06-08 01:34

本文选题：护坡 + 根系　；参考：《华中科技大学学报(自然科学版)》2014年08期

【摘要】：以护坡典型植物多花木兰根系为对象进行室内抗拉试验;在假定滑动面平行于坡面的前提下,推导生态护坡中坡体稳定系数的计算公式;研究不同坡度下根系的抗拉力、抗拉强度、弹性模量及边坡的稳定性.研究表明:多花木兰根系抗拉力随着直径的增大呈幂函数增加;根系抗拉强度为21.15~76.08MPa,随着直径的增加呈幂函数减小;坡度越大,同一直径根系的抗拉力与抗拉强度越大.多花木兰根系弹性模量为0.64~2.33GPa,随着直径的增加其弹性模量逐渐减小;根系直径为1.2~2.2mm时,弹性模量减小的幅度大,其他区间减小的幅度较小.坡体的稳定系数与根系的抗拉力呈正相关关系,与边坡的坡度呈负相关关系,并受根的生长方向和密度、植物的种植密度以及原状土的性质等影响.坡体的稳定系数随根系直径的增加呈线性增加.
[Abstract]:The indoor tensile tests were carried out on the Hua Mulan roots of typical plants in slope protection. On the assumption that the sliding surface was parallel to the slope surface, the calculation formula of the stability coefficient of the slope body was derived, and the tensile strength of the root system under different slope degrees was studied. Tensile strength, elastic modulus and slope stability. The results showed that the tensile strength of multiple Hua Mulan roots increased by power function with the increase of diameter, the tensile strength of root system was 21.1576.08MPa, and decreased with the increase of diameter. The larger the slope, the greater the tensile strength and tensile strength of root system with the same diameter. The elastic modulus of multiple Hua Mulan roots was 0.64 ~ 2.33 GPA, and the elastic modulus decreased gradually with the increase of diameter. When the root diameter was 1.2~2.2mm, the elastic modulus of root system decreased by a large extent, while that of other regions decreased slightly. The stability coefficient of slope was positively correlated with root tensile strength, negatively correlated with slope gradient, and affected by root growth direction and density, plant planting density and properties of undisturbed soil. The stability coefficient of slope increased linearly with the increase of root diameter.
【作者单位】：华中科技大学土木工程与力学学院;湖北工业大学土木工程与建筑学院;
【基金】：国家自然科学基金资助项目(51178166) 2012年湖北省科技厅创新群体项目(2012FFA035) 教育部新世纪优秀人才支持计划资助项目(NCET-11-0962)
【分类号】：S792;U416.14

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