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通过分析目前青藏铁路多年冻土区斜坡路堤稳定性状况的本质特点,结合目前稳定性计算分析方法研究现状,切合实际地提出了从热学和力学两方面分别进行分析和计算,并综合评价斜坡路堤稳定性的方法。通过现场典型断面的计算分析可以看出:①对于热力学属性呈动态变化的斜坡路堤,分析其最不利状况可以得到符合实际的稳定性状况结果;②当斜坡路堤处于热学稳定状态时,其力学稳定性也可能呈现不稳定情况,所以需要从热、力学两方面共同分析其稳定性才能得到较为全面的符合现场实际的结论。此方法原理简单、结果明确,对于多年冻土区斜坡路堤在运营阶段的稳定性分析和评价具有重要的指导意义。
Based on the analysis of the essential characteristics of the current embankment stability conditions in the Qinghai-Tibet Railway permafrost region and the current status of the research on stability calculation and analysis methods, it is proposed that the embankment embankment should be analyzed and calculated from both thermal and mechanical aspects. Method of stability. Through the analysis and calculation of the typical cross-section of the site, it can be seen that: (1) For the embankment with dynamic changes of thermodynamic properties, the most adverse conditions can be analyzed to obtain the results of the stability conditions; (2) When the slope embankment is in a thermally stable state, its mechanical stability Sex may also show instability, so the need to jointly analyze its stability from both thermal and mechanical in order to get a more comprehensive field with the actual conclusion. The method is simple in principle and the result is clear. This method has important guiding significance for the stability analysis and evaluation of the slope embankment in the permafrost region during operation.