中文摘要：

为研究环境因素对土体温度场的影响,通过制作膨胀土边坡模型,利用环境发生器模拟温度、湿度和降雨等环境,观测在这些环境因素作用下土体内部温度场的分布与变化规律,试验结果表明：温度、相对湿度和降雨等环境因素对边坡土体内温度场的影响深度为0.8 m;边坡不同部位的温度变化与分布也不同,其中坡面处的变化幅度最大;土体温度随环境温度的变化存在明显的滞后性,且深度越大,滞后效应越明显。在环境温度的变化情况和环境相对湿度相同的条件下,降雨后土体温度变化速率减小。在相同的环境温度下,深度0.2 m范围内的土体温度随环境相对湿度的降低而降低,且降雨前的下降幅度总体上大于降雨后的下降幅度。

英文摘要：

In order to investigate the influence of environmental factors on temperature field in expansive soil slope,the distribution and variation of temperature field in the soil under the factors such as temperature,humidity and rainfall,were measured by making a model of expansive soil slope and using an environmental generator to stimulate the environmental factors.The test shows that the influence depth of the environmental factors on temperature field in the slope soil is 0.8 m;the variation and distribution of temperature is different in different parts of the slope,and the largest change occurs at the slope surface;obvious hysteretic effect appears as soil temperature changes with the environmental temperature.The deeper the depth,the more obvious the hysteresis effect is found.When the variation of the environmental temperature is the same as that of the environmental relative humidity,the change rate of soil temperature decreases after rain.When the environmental temperature is the same,soil temperature within the depth of 0.2 m decreases as the environmental relative humidity decreases,and the decreased magnitude before rain is generally larger than that after rain.