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基于现场监测资料,对黄土路堑边坡坡面下土体水热变化规律进行分析研究.结果表明,左边坡坡面下土体温度高于右边坡,左边坡冻结期和冻结深度小于右边坡;右边坡含水率变化深度大于左边坡,水分在边坡5 cm以上浅层土体中迁移速度基本相同,在边坡坡面25 cm以下土体渗透性差异较大,左边坡迁移速度低于右坡;冬季左边坡坡面下浅层土体和右边坡观测范围内地温低于0℃,右边坡坡面25 cm以上对应的含水率为零,而左边坡浅层土体和右边坡25 cm以下土体含水率并不为零;干湿循环和冻融循环在左右边坡土体中的显著程度和影响深度不同.
The results show that the temperature of the soil under the left slope is higher than that of the right slope, and the freezing period and freezing depth of the left slope are less than the right slope. The change of water cut in the right slope is greater than that in the left slope. The water migration rate in the shallow soil above 5 cm is basically the same. The permeability of the soil is larger than 25 cm in the slope, Slope; in winter, the ground temperature in the observation area of shallow soil and the right slope under the left slope is lower than 0 ℃, the corresponding moisture content above 25 cm on the right slope is zero, while the left slope and the right slope are 25 cm The following soil moisture content is not zero; wet and dry cycles and freeze-thaw cycles in the soil around the significant extent and depth of impact is different.