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在辐射强烈,路基单侧病害严重具有明显阴阳坡面的路段,遮阳板路基护坡作为保持路基稳定的主动调控措施被采用。在对试验工程近3年的观测资料分析基础上,将路基温度场和变形进行了对比研究,认为:遮阳板工程措施能大大减少板体下路基体吸热,显著抬升人为上限,降低上限附近土体温度,调控路基阴阳面吸热不均的差异,使路基温度场向有利于冻土稳定的趋势发展;棚室效应使得地温年振幅减小,减弱了冻胀、融沉、不均匀变形等病害的作用。试验证明,遮阳板工程措施是一种行之有效的保持冻土稳定的地温调控方法。
In the strong radiation, roadbed unilateral serious disease has obvious yin and yang slope sections, sun visor embankment slope protection as a way to maintain the stability of subgrade was adopted. Based on the analysis of observed data of the experimental project in recent 3 years, the temperature field and deformation of the embankment are compared and studied. It is concluded that the sun visor engineering measures can greatly reduce the heat absorption of the subgrade body, significantly raise the artificial upper limit and lower the upper limit Soil temperature and unevenness of heat absorption in the yin and yang of subgrade so that the subgrade temperature field tends to be in favor of the stability of frozen soil. The greenhouse effect reduces the amplitude of geothermal year, weakens the frost heave, thaw and uneven deformation The role of other diseases. Experiments show that sun visor engineering measures is an effective method to maintain the stability of frozen soil temperature control.