New method for full-process deformation of slopes subject to drying-wetting cycles

IF 4.2 2区工程技术 Q3 ENGINEERING, ENVIRONMENTAL Bulletin of Engineering Geology and the Environment Pub Date : 2025-04-26 DOI:10.1007/s10064-025-04261-8

Fangyue Luo, Ga Zhang

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Abstract

Slope deformation due to drying-wetting cycles is a great concern in both the risk warning of slopes and the design of various slope structures on the slope. A new full-process slope deformation analysis method was derived based on slice methods, with innovations in terms of the constitutive equation, displacement compatibility equation, and stress equilibrium equation. A constitutive model of the soil was proposed with defined parameters, and it was reported to perform well in the prediction of the deformation increment and strength reduction due to drying-wetting cycles. The potential slip surface was shown to be a key component of characterizing the full-process deformation of a slope and to exhibit the displacement compatibility trend in which the relative horizontal displacement along the potential slip surface was equal at various locations. A slope deformation analysis algorithm was derived to analyze the shear deformation characteristics of potential slip surfaces and the volumetric deformation characteristics of sliding bodies subjected to drying-wetting cycles. The proposed method was validated by comparing the predicted slope deformation characteristics with centrifuge model test and field observation results under drying-wetting cycles. The method was confirmed to predict the full-process deformation of soil slopes during drying-wetting cycles, including the small deformation stage, prefailure stage, failure process and postfailure stage.

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干湿循环作用下边坡全过程变形的新方法

干湿循环引起的边坡变形是边坡风险预警和各种边坡结构设计中关注的问题。基于切片法，在本构方程、位移协调方程和应力平衡方程等方面进行了创新，推导出一种新的边坡全过程变形分析方法。提出了具有定义参数的土体本构模型，该模型能较好地预测干湿循环引起的土体变形增量和强度降低。潜在滑动面是表征边坡全过程变形的关键组成部分，并表现出各位置沿潜在滑动面相对水平位移相等的位移协调趋势。推导了一种边坡变形分析算法，分析了干湿循环作用下潜在滑移面的剪切变形特征和滑动体的体积变形特征。通过将预测的边坡变形特征与干湿循环下的离心模型试验和现场观测结果进行对比，验证了该方法的有效性。结果表明，该方法可以预测土体在干湿循环过程中的小变形阶段、破坏前阶段、破坏过程和破坏后阶段的全过程变形。

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来源期刊

Bulletin of Engineering Geology and the Environment 工程技术-地球科学综合

CiteScore

7.10

自引率

11.90%

发文量

445

审稿时长

4.1 months

期刊介绍： Engineering geology is defined in the statutes of the IAEG as the science devoted to the investigation, study and solution of engineering and environmental problems which may arise as the result of the interaction between geology and the works or activities of man, as well as of the prediction of and development of measures for the prevention or remediation of geological hazards. Engineering geology embraces: • the applications/implications of the geomorphology, structural geology, and hydrogeological conditions of geological formations; • the characterisation of the mineralogical, physico-geomechanical, chemical and hydraulic properties of all earth materials involved in construction, resource recovery and environmental change; • the assessment of the mechanical and hydrological behaviour of soil and rock masses; • the prediction of changes to the above properties with time; • the determination of the parameters to be considered in the stability analysis of engineering works and earth masses.