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1、前言岸坡失稳破坏是堤防工程建设中常见的灾害,其岸坡变形破坏的类型有崩岸/崩塌、滑坡等,而影响边坡稳定性的因素有多种。正确认识、分析并评价岸坡的稳定性,是十分及其必要地。堤基土体多复杂多变、影响因素繁杂,其稳定性评价应更多地依靠工程地质分析,但长期以来对于岸坡稳定性的分析,多重土层单元,轻土体结构,重单因素分析,轻多因素综合,重静态评判,轻动态预测,因此对于堤岸边坡稳定性分析,应将堤基土体当做一个系统,全面深入的分析工程地质条件,使堤基稳定分析评价更为合理。虽然影响岸坡稳定的因素有多种,例如:内部因素岩土类型和性质、地质结构、地下水作用,外部因素岸坡形态、水流条件、气候条件及施工因素等。但总体而言控制堤基稳定性主要是三个因素:土层的物理性质、土体的结构以及环境影响。显然,均质堤基的稳定性主要取决于土层的物理力学性质;非均质堤基的稳定性则由土体结构
1. Introduction The instability damage of bank slope is a common disaster in the construction of embankment. There are many types of deformation and failure of bank slope such as bank collapse, landslide and so on. There are many factors affecting the stability of slope. Correct understanding, analysis and evaluation of the stability of the bank is very necessary and necessary. The embankment soils are more complex and changeable, and the influencing factors are complex. The stability evaluation should depend more on the engineering geological analysis. However, for a long time, the analysis of the stability of the bank, multiple soil layers, light soil structure, heavy single factor Analysis, light multi-factor synthesis, heavy static evaluation and light dynamic prediction. Therefore, for embankment slope stability analysis, the embankment soil should be regarded as a system to comprehensively and deeply analyze the engineering geological conditions and make the stability analysis and evaluation of the embankment more Reasonable. Although there are many factors affecting the stability of the bank, for example: the type and nature of the rock and soil factors, the geological structure, the groundwater effect, the external factors such as the slope shape, current conditions, climatic conditions and construction factors. However, on the whole, the control of embankment stability mainly consists of three factors: the physical properties of the soil layer, the structure of the soil mass and the environmental impact. Obviously, the stability of homogeneous embankment depends mainly on the physical and mechanical properties of soil; the stability of heterogeneous embankment is determined by soil structure