土与全风化岩双元边坡整体稳定性计算分析

doi:10.13722/j.cnki.jrme.2019.0927

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摘要国内土岩双元边坡整体破坏模式研究较少。为探究济南地区土与全风化岩双元边坡整体稳定性分析方法，基于同一团队相同地质条件边坡圆弧滑动的整体破坏模式，运用瑞典圆弧法对土层与全风化岩石边坡进行分析，得到水平积分模型和竖直积分模型的边坡稳定解析解，并针对具体算例运用有限元法进行验证。最后选取济南地区土与全风化岩石典型地层，运用plaxis3D有限元软件，分析坡率及土层与岩层比例对滑移面坡顶开裂点及安全系数的影响，提出滑移面坡顶开裂点值拟合公式。结果表明：水平积分模型得出的安全系数略小于竖直积分模型，解析解得出的安全系数小于有限元法；固定边坡高度，土与全风化岩双元边坡土层越厚，边坡就越不稳定；坡率越小，安全系数越大。研究结果可供同类工程参考应用。

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	李连祥1
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关键词 ：边坡工程, 双元边坡, 整体稳定性, 瑞典圆弧法, 安全系数, 滑移面开裂点

Abstract：There are few studies on the overall failure mode of the soil-rock dual slope in China. In order to explore the overall stability analysis method of the dual-element slope of soil and fully weathered rock in Jinan，based on the overall failure mode of the same team with the same geological conditions of circular arc sliding，the Swedish circular arc method was applied to the soil layer and the fully weathered rock slope. Analyze and obtain the slope stability analysis solution of the horizontal integration model and the vertical integration model，and use the finite element method to verify the specific calculation example. Finally，select typical soil and weathered rock strata in Jinan area，use plaxis 3D finite element software，analyze the slope and the ratio of soil layer to rock layer on the slip surface slope top crack point and safety factor，and propose the value of slip surface slope top crack point Fit formula. The results show that the safety factor obtained by the horizontal integration model is slightly less than the vertical integration model，and the safety factor obtained by the analytical solution is less than the finite element method. The fixed slope height，the thicker the soil layer of the dual element slope of soil and fully weathered rock，the edge The more unstable the slope；The smaller the slope，the greater the safety factor. The research results can be used for reference in similar projects.

Key words： slope engineering the dual-slope overall stability Swedish arc method safety factor crack point of slip surface

引用本文:

李连祥1，2，贾斌1，2，赵永新1，2，仇晖3. 土与全风化岩双元边坡整体稳定性计算分析[J]. 岩石力学与工程学报, 2020, 39(S1): 2785-2794.
LI Lianxiang1，2，JIA Bin1，2，ZHAO Yongxin1，2，QIU Hui3. Calculation and analysis of the overall stability of the dual element slope of soil and fully weathered rock. , 2020, 39(S1): 2785-2794.

链接本文:

http://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2019.0927 或 http://rockmech.whrsm.ac.cn/CN/Y2020/V39/IS1/2785

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