黏性土填料下考虑土拱效应的挡土墙被动土压力计算

发布时间：2018-06-14 11:29

本文选题：挡土墙 + 被动土压力　；参考：《岩土力学》2014年S1期

【摘要】：为解释挡土墙后填土被动土压力的非线性分布现象,在考虑土拱形状为圆弧,滑裂面采用朗肯滑裂面的基础上,给出考虑土拱效应的被动土压力系数Kawn,进而基于应力状态法及土楔形体静力平衡两种思想求解了竖向平均应力v?公式,在该基础上,给出黏性土填料下的挡土墙被动土压力分布公式、合力公式及作用点高度计算公式。通过与试验与其他方法对比,文中提出的方法得到验证。最后,研究了黏性土填料下的挡土墙被动土压力变化规律,即考虑土拱效应求得的黏性土填料的被动土压力分布呈现上小下大的指数型分布。此外,随着δ/φ(δ为墙土摩擦角,φ为内摩擦角)的增大,土拱效应逐渐增强,土压力合力点逐渐降低。
[Abstract]:In order to explain the nonlinear distribution of earth pressure after retaining wall, on the basis of taking the shape of soil arch as circular arc and the slide surface using the Rankine slip surface, the dynamic soil pressure coefficient Kawn, which considers the soil arch effect, is given, and then the vertical average stress V formula is solved based on the two ideas of stress state method and the Jing Liping balance of soil wedge shape. On this basis, the formula of the soil pressure distribution of retaining wall under the clay filling, the formula of the joint force and the calculation formula of the height of action point are given. By comparing with the test and other methods, the method proposed in this paper is verified. Finally, the change law of the earth pressure on retaining wall under the clay filler is studied, that is, the viscosity of the soil arch effect is considered. The distribution of the soil pressure distribution of the soil packing shows a small and large exponential distribution. In addition, with the increase of delta / [Delta as the friction angle of the wall soil and the internal friction angle of phi), the soil arch effect is gradually enhanced and the resultant force point of soil pressure gradually decreases.
【作者单位】：杭州科技职业技术学院城市建设学院;厦门大学土木工程系;中国石油天然气华东勘察设计研究院岩土工程处;西南林业大学土木工程学院;北方工业大学建筑工程学院;
【基金】：国家自然科学基金资助(No.51209180) 浙江省自然科学基金资助(No.Y1091175)
【分类号】：TU476.4

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