考虑土拱效应的粘性填土平行挡土墙侧向土压力计算方法

发布时间：2018-06-14 14:57

本文选题：道路工程 + 侧向土压力　；参考：《中国公路学报》2014年04期

【摘要】：考虑土拱效应的影响,采用圆弧形拱作为小主应力轨迹,以粘性填土平行挡土墙为研究对象进行了研究。充分考虑墙土摩擦角、填土内摩擦角、填土粘聚力、竖向均布荷载、平行挡土墙间的水平距离等多种影响因素,运用力学单元平衡方程和摩尔-库伦强度理论推导了平行挡土墙侧向土压力系数和侧向土压力计算公式。最后通过算例分析得出墙土摩擦角部分发挥和充分发挥,以及平行挡土墙间水平距离对墙侧向土压力的影响变化规律。结果表明:考虑土拱效应的侧向土压力系数和侧向土压力沿深度为非线性分布,并且其与墙土摩擦角、填土内摩擦角、填土粘聚力、竖向均布荷载、平行挡土墙间的水平距离有关;不考虑土拱效应的常规方法计算得到的土压力偏不安全。
[Abstract]:Considering the influence of soil arch effect, the circular arc arch is used as the trace of small principal stress, and the parallel retaining wall with cohesive fill is studied as the object of study. The factors affecting the wall and soil friction angle, the internal friction angle, the cohesive force of the fill, the vertical uniform load, the horizontal distance between the parallel retaining walls and so on are fully considered. The formulas of lateral earth pressure coefficient and lateral earth pressure of parallel retaining walls are derived by using the equilibrium equation of mechanical elements and the Moorn-Coulomb strength theory. Finally, the influence of horizontal distance between parallel retaining walls on the lateral earth pressure of the wall is obtained by the analysis of the examples of the partial exertion and full play of the friction angle of the wall and the influence of the horizontal distance between the parallel retaining walls on the lateral earth pressure. The results show that the lateral earth pressure coefficient and lateral earth pressure are nonlinear distribution along the depth considering the soil arch effect, and the friction angle of the wall soil, the internal friction angle of the fill, the cohesive force of the fill and the vertical uniform load are obtained. The horizontal distance between the parallel retaining walls is related, and the earth pressure calculated by the conventional method without considering the soil arch effect is not safe.
【作者单位】：燕山大学建筑工程与力学学院;东北大学秦皇岛分校规划处;
【基金】：国家自然科学基金项目(51074140) 河北省科技计划项目(12217650)
【分类号】：U417.1

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