A nonlinear variation safety factor calculation method for slopes based on slide mass shear constitutive model and landslide displacement

IF 8.4 1区工程技术 Q1 ENGINEERING, GEOLOGICAL

Engineering Geology Pub Date : 2025-09-17 DOI:10.1016/j.enggeo.2025.108363

Yi Tang , Hang Lin , Rihong Cao , Chaoyi Yang

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引用次数: 0

Abstract

Landslide displacement dynamically drives the evolution of slope stability, a critical phenomenon empirically demonstrated by numerous early-warning cases. Yet, conventional slope stability calculation methods fundamentally fail to capture this displacement-dependent behavior. Knowing the effect of landslide displacement on slope stability can greatly improve the efficiency of landslide warning and reduce the loss caused by landslide disaster. For this reason, this paper constructs a rock shear constitutive model based on damage mechanics. Considering the parameter differences between small-size specimens and large rock masses due to the size effect, the Hoek-Brown criterion is introduced. By the Hoek-Brown criterion, the rock shear constitutive model was successfully transformed into a slide mass shear constitutive model. Finally, the slide mass shear constitutive model was brought into the slope model and an expression for the dynamic calculation of slope safety factor based on landslide displacement was derived. In addition, Finite Difference Method (FDM) was used to verify the validity of the dynamic calculation expression of slope safety factor in this paper. The results show that each rock interface on the slip surface of the slope owns a different shear constitutive curve due to the different normal loads. The factor of safety of the slope will show a nonlinear variation with the increase of the landslide displacement.

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基于滑坡质量剪切本构模型和滑坡位移的边坡非线性变异安全系数计算方法

滑坡位移动态地驱动着边坡稳定性的演化，这是一种被大量预警案例经验证明的关键现象。然而，传统的边坡稳定性计算方法从根本上无法捕捉到这种与位移相关的行为。了解滑坡位移对边坡稳定性的影响，可以大大提高滑坡预警的效率，减少滑坡灾害造成的损失。为此，本文建立了基于损伤力学的岩石剪切本构模型。考虑到小尺寸试样与大尺寸岩体由于尺寸效应而产生的参数差异，引入了Hoek-Brown准则。通过Hoek-Brown准则，成功地将岩石剪切本构模型转化为滑动体剪切本构模型。最后，将滑坡质量剪切本构模型引入边坡模型，导出了基于滑坡位移的边坡安全系数动态计算表达式。此外，利用有限差分法（FDM）验证了本文边坡安全系数动力计算表达式的有效性。结果表明：由于法向荷载的不同，边坡滑面上各岩石界面具有不同的剪切本构曲线；随着滑坡位移的增大，边坡的安全系数呈非线性变化。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Engineering Geology 地学-地球科学综合

CiteScore

13.70

自引率

12.20%

发文量

327

审稿时长

5.6 months

期刊介绍： Engineering Geology, an international interdisciplinary journal, serves as a bridge between earth sciences and engineering, focusing on geological and geotechnical engineering. It welcomes studies with relevance to engineering, environmental concerns, and safety, catering to engineering geologists with backgrounds in geology or civil/mining engineering. Topics include applied geomorphology, structural geology, geophysics, geochemistry, environmental geology, hydrogeology, land use planning, natural hazards, remote sensing, soil and rock mechanics, and applied geotechnical engineering. The journal provides a platform for research at the intersection of geology and engineering disciplines.