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通过对河北张承高速公路路基南山窑黄土进行封闭系统的室内冻胀试验,研究含水率、上覆荷载、干密度影响下路基土的冻胀规律,得出冻胀率在这3个因素作用下的回归正交公式。通过对冻胀、冻缩过程中变形及试样内温度、水分情况进行分析,进一步解释其机理。
Through the indoor frost heaving test of closed system of Nanshanyao loess roadbed in Zhangcheng expressway, the frost heaving rule of subgrade soil under the influence of water content, overburden load and dry density is studied. The results show that frost heave rate plays an important role in these three factors Under the regression orthogonal formula. Through the analysis of the deformation in frost heaving and freezing process and the temperature and moisture in the sample, the mechanism is further explained.