极端冻融环境斜坡稳定性评估与防护研究新进展OA

Global climate change leads to increasingly frequent extreme low-temperature and severe temperature difference events,intensifying the disaster risk from the instability of natural and engineering slopes in extreme freeze-thaw regions and seriously threatening engineering construction,operation,and maintenance.Under extreme freeze-thaw environments,the slope instability evolution presents complex characteristics of multi-field coupling and multi-factor superposition,which is manifested as a progressive relationship of"freeze-thaw action,hydro-thermal evolution of slope mass,geomaterial degradation,and instability triggering".The degradation laws of mechanical properties of geomaterials,the hydro-thermal evolution laws of slopes,and their coupling mechanisms with instability modes under freeze-thaw environments were systematically reviewed.The slope stability assessment methods considering freeze-thaw effects were elaborated,including simplified calculation methods and numerical simulation calculation methods.Advances in slope protection and reinforcement technologies suitable for freeze-thaw environments were summarized,with particular attention paid to the mechanical characteristics and design key points of protective structures under frost heave loads.New development ideas in fields such as the calculation of multi-hazard coupling effects and risk assessment of cascading disasters of alpine frozen soil slope instability were discussed,providing engineering references and scientific bases for the construction,operation,and maintenance,as well as risk prevention and control of major projects in severe cold and high-altitude regions.