基于广义水平切片法的多层边坡稳定性和破坏模式上界极限分析

IF 4.1 2区 地球科学 Q1 GEOSCIENCES, MULTIDISCIPLINARY
Huawei Zhang, Changdong Li, Wenqiang Chen, Ni Xie, Guihua Wang, Wenmin Yao, Xihui Jiang, Jingjing Long
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引用次数: 0

摘要

多层斜坡广泛存在于粘土残积物受纳场中。本文提出了一种用于评估多层斜坡稳定性的广义水平切片法(GHSM),该方法考虑了相邻水平切片之间的能量耗散。根据上限极限分析理论,推导出了能量方程,并通过比较通过坡脚的滑动面(模式 A)和下方的滑动面(模式 B),得出了最终破坏模式。此外,还研究了切片数对 GHSM 中稳定系数的影响,并得到了稳定值。与原始方法(陈氏方法)相比,GHSM 考虑了滑动土体内部的能量耗散,能获得更精确的结果。此外,应用 GHSM、极限平衡法(LEM)和数值模拟法(NSM)分析了不同坡角的多层斜坡的稳定性,在每种情况下安全系数和破坏模式的结果都非常接近。当坡度角不大于 28°时,最终破坏模式为模式 B。这说明确定极限滑动面需要比较多种破坏模式,而不仅仅是模式 A。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Upper-Bound Limit Analysis of the Multi-Layer Slope Stability and Failure Mode Based on Generalized Horizontal Slice Method

Multi-layer slopes are widely found in clay residue receiving fields. A generalized horizontal slice method (GHSM) for assessing the stability of multi-layer slopes that considers the energy dissipation between adjacent horizontal slices is presented. In view of the upper-bound limit analysis theory, the energy equation is derived and the ultimate failure mode is generated by comparing the sliding surface passing through the slope toe (mode A) with that below (mode B). In addition, the influence of the number of slices on the stability coefficients in the GHSM is studied and the stable value is obtained. Compared to the original method (Chen’s method), the GHSM can acquire more precise results, which takes into account the energy dissipation in the inner sliding soil mass. Moreover, the GHSM, limit equilibrium method (LEM) and numerical simulation method (NSM) are applied to analyze the stability of a multi-layer slope with different slope angles and the results of the safety factor and failure mode are very close in each case. The ultimate failure modes are shown to be mode B when the slope angle is not more than 28°. It illustrates that the determination of the ultimate sliding surface requires comparison of multiple failure modes, not only mode A.

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来源期刊
Journal of Earth Science
Journal of Earth Science 地学-地球科学综合
CiteScore
5.50
自引率
12.10%
发文量
128
审稿时长
4.5 months
期刊介绍: Journal of Earth Science (previously known as Journal of China University of Geosciences), issued bimonthly through China University of Geosciences, covers all branches of geology and related technology in the exploration and utilization of earth resources. Founded in 1990 as the Journal of China University of Geosciences, this publication is expanding its breadth of coverage to an international scope. Coverage includes such topics as geology, petrology, mineralogy, ore deposit geology, tectonics, paleontology, stratigraphy, sedimentology, geochemistry, geophysics and environmental sciences. Articles published in recent issues include Tectonics in the Northwestern West Philippine Basin; Creep Damage Characteristics of Soft Rock under Disturbance Loads; Simplicial Indicator Kriging; Tephra Discovered in High Resolution Peat Sediment and Its Indication to Climatic Event. The journal offers discussion of new theories, methods and discoveries; reports on recent achievements in the geosciences; and timely reviews of selected subjects.
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