黄土路堑边坡土体水热变化特征现场监测研究

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.

Study on in-situ monitoring of moisture and temperature characteristic for the loess cutting slopes

Based on the field monitoring data,the moisture and temperature variation of the loess cutting slope soil were analyzed.The results showed that the temperature of the soil under the left slope higher than the right side,the freezing period and frozen depth of the left side slope is less than the right.On the right side of the moisture content change depth is larger than the left,the moisture migration rate in more than 5 cm of the shallow soil slope is basically same.The permeability differences in the slopes below 25 cm,the migration rate of the left slope is lower than the right.The temperature of the left slope shallow soil and the right slope soil of the observa-tion area are lower than 0 ℃ in the winter.The corresponding moisture content of the right slope for more than 25 cm is zero,while the left slope surface shallow soil and right slope below 25 cm are not zero.The significant degree and influence depth of the cutting slope soil for drying-wetting cycles and the freezing-thawing cycles are different.