摘要
基于应力莫尔圆推导了黏性土层间剪应力的计算公式,进而建立了综合考虑层间剪应力、位移效应和土拱效应的主动土压力计算模型,最终构建的数值迭代格式不仅解决了黏性土力学模型中引入层间剪应力无法积分得到显示解的问题,还能够准确计算非极限主动土压力的强度、合力及作用点。将本解、朗肯解、现有解析解与典型模型试验结果对比分析发现:引入层间剪应力后,本解答计算极限主动土压力与非极限主动土压力均更加准确,与实测结果的契合度更高。
Firstly, the viscosity calculation formula of shear stress was deduced based on stress Mohr’s circle and then active earth pressure calculation model was established with established comprehensive consideration of shear stress between layer, displacement effect and the soil arch effect. The numerical iteration scheme not only solved the problem that display solution cannot obtained by introducing the interlayer shear stress in the clayey soil mechanics model, but also can accurately calculate the strength, resultant force and application point of non-limit active earth pressure. Comparing the results of the proposed solution, rankine solution and the existing analytical solution with typical model tests, it is found that the ultimate active earth pressure and non-limit active earth pressure of proposed solution is more accurate with the introduction of interlayer shear stress, and has a higher agreement with the measured results.
作者
马明
李明东
张京伍
朱丽萍
MA Ming;LI Ming-dong;ZHANG Jing-wu;ZHU Li-ping(School of Civil and Architectural Engineering,East China University of Technology,Nanchang 330013,China;Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering,Nanjing 210098,China;School of Water Resources and Environmental Engineering,East China University of Technology,Nanchang 330013,China)
出处
《广西大学学报（自然科学版）》
CAS
北大核心
2022年第4期854-861,共8页
Journal of Guangxi University（Natural Science Edition）
基金
国家自然科学基金项目(51869001)
岩土力学与堤坝工程教育部重点实验室开放研究基金项目(2020008)。
关键词
土压力
数值解
非极限
层间剪应力
土拱效应
earth pressure
numerical solution
non-limit
interlayer shear stress
soil arching effect
