中文摘要：

为了获得大气对膨胀土边坡的动态影响过程，在南宁对新开挖膨胀土边坡进行了现场监测，从湿、热两方面对大气影响深度进行了分析。结果表明，含水量变化下的大气影响深度随季节性干湿循环而变大，但其变化滞后于温度；温度变化下的大气影响深度基本稳定，但“季节性影响深度”远大于“日影响深度”；采取植被防护后，植被的蒸发、蒸腾作用，可减小温度、湿度的变动幅度，降低影响深度。可见，新开挖的膨胀土边坡需采取即时防护，植被护坡可有效降低大气对边坡土体的风化作用。

英文摘要：

To obtain the atmosphere dynamic influence process, a field monitoring system on the newly excavated expensive soil slope is established in Nanning, Guangxi. From the aspects of moisture and heat, the atmosphere influence depth is analyzed. The results show that the influence depth of water content increases with the seasonal cycle of drying-wetting progress; the change lags the heat changes; the seasonal influencing depth of heat is invariable; and the depth affected by seasonal cycle is much higher than daily influence depth. With the vegetation cover, the fluctuation of the moisture and heat field is mitigated because of its evaporation and transpiration behavior, which prevent the development of the atmosphere influence depth. It concludes that the newly excavated expansive soil slope must be protected immediately, and the weathering process can be effectively mitigated in the seeded slope.