土工合成材料加筋土挡墙筋材内力分析

发布时间：2018-05-07 22:21

本文选题：土工合成材料加筋土挡墙 + 筋材内力　；参考：《工程力学》2017年02期

【摘要】：土工合成材料加筋土挡墙是一种新型的挡土结构,它具有经济性好、性能优越、适应性强等优点。而筋材内力计算是该类结构设计的一个关键步骤,因此该类结构的推广应用需要一种合理易用的内力分析方法。该文讨论了几种土工合成材料加筋土挡墙的筋材内力分析方法,并对这些方法的优缺点进行评述。这些方法包括基于主动土压力系数的方法、基于经验的K刚度法、基于极限平衡的加筋边坡稳定分析方法、基于非线性弹性与变形协调的理论方法、以及基于增量非线性及填土剪胀性的筋材内力分析方法等。通过比较分析发现,如忽略面板作用且填土强度得到完全发挥,基于主动土压力系数以及极限平衡边坡分析的方法适用于分析加筋土挡墙在强度极限状态时的筋材内力,但填土强度的发挥水平决定于筋材的长期刚度。另一方面,如能合理考虑筋材的长期刚度以及面板的约束作用,基于筋土变形协调的理论分析方法适用于分析加筋土挡墙在正常工作荷载作用下的筋材内力。
[Abstract]:Geotextile reinforced retaining wall is a new type of retaining structure, which has the advantages of good economy, superior performance and strong adaptability. The calculation of internal force of steel bar is a key step in the design of this kind of structure, so the popularization and application of this kind of structure need a reasonable and easy to use method of internal force analysis. In this paper, several methods of internal force analysis of reinforced earth retaining wall with geosynthetics are discussed, and the advantages and disadvantages of these methods are reviewed. These methods include the method based on active earth pressure coefficient, the empirical K stiffness method, the stability analysis method of reinforced slope based on limit equilibrium, and the theoretical method based on the coordination of nonlinear elasticity and deformation. And the internal force analysis method based on incremental nonlinear and fill shear expansion. Through comparison and analysis, it is found that the method based on active earth pressure coefficient and limit equilibrium slope analysis can be used to analyze the internal force of reinforced earth retaining wall when the strength limit state of reinforced earth retaining wall is analyzed, such as neglecting the action of the face slab and giving full play to the strength of the fill soil. However, the exertion level of fill strength depends on the long-term stiffness of reinforcement. On the other hand, if the long-term stiffness of the reinforcement and the constraint of the slab can be reasonably considered, the theoretical analysis method based on the coordination of the deformation of the reinforced soil is suitable for the analysis of the internal force of the reinforced earth retaining wall under the normal working load.
【作者单位】：华中科技大学土木工程与力学学院;
【基金】：国家自然科学基金项目(51379082)
【分类号】：TU476.4;TU531.7

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