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通过饱水粗粒土与饱水细粒土的冻结试验,得出饱水粗粒土的冻结是形成公路涎流冰的内部条件,三层体中形成的密闭体系是其形成的外部条件的结论。根据病害形成原理和成因分析,借鉴传统防治措施,针对路堑边坡提出蓄冰沟与渗井结合的新型防治措施,并使用Midas/GTS软件对蓄冰沟与渗井措施进行应力与渗流耦合数值模拟分析。发现采取新型防治措施(工后)坡面的水头、孔隙水压、渗流速度以及位移和未采取新型防治措施(工前)相比都明显减小,现场观测到坡面夏季渗水量和冬季涎流冰体积大幅减小,工后效果良好。
Based on the freezing experiments of saturated and coarse grained soils, it is concluded that the freezing of saturated grained soils is the internal condition for the formation of highway saltwater ice. The closed system formed in the three-layer structure is the external condition in conclusion. Based on the principle of disease formation and its causes, traditional control measures were taken for reference. A new type of prevention and control measures was put forward to combine the ice-filling ditches and seepage well for the cutting slope, and the coupling of stress and seepage between the ice-filling ditch and the seepage control measures Simulation analysis. It was found that the water head, pore water pressure, seepage velocity and displacement of slope on the slope surface were significantly reduced compared with those without adopting new prevention and control measures (pre-construction). The on-site summer rainfall Flow ice volume decreased significantly, the effect is good after work.