路堤温度场与天然地面下温度场对比分析

为研究大气温度对高填方路堤和天然地面下温度场影响特性的异同，依托三淅高速公路工程灵卢段黄土填方试验段，在路堤及天然地面下埋设温度传感器，进行现场跟踪实测，在时间轴和深度轴上分析土体温度的变化规律、变化幅度及大气温度的影响深度。研究结果表明:土体温度变化的滞后性普遍存在于路堤内部及天然地面以下，且浅层变化幅度大，深层变化幅度小；在同一时刻，路堤中存在不同温度变化趋势；在相同深度层中，路堤内部温度变化幅度大于天然地面以下；大气温度对天然温度场的影响深度在4~ 6 m之间，对黄土路堤温度场的影响深度大于10 m

Contrastive Analysis on Temperature Field of Embankment and That under Natural Ground Surface

In order to study difference between effects of atmospheric temperature on temperature field of high-filled embankment and that under natural ground surface, taking the loess filled section for test of Linglu Section of Sanmenxia-Xichuan Highway as the background, temperature sensors were buried in the embankment and under natural ground surface for on site tracing and measuring, and then on the axis of time and depth, the change laws and amplitude of the soil temperature, and the depth affected by atmospheric temperature were analyzed. The results show that there is hysteresis of soil temperature variation generally existed in the embankment and under natural ground surface with large change amplitude in shallow layer and small one in deep layer; at the same moment, different temperature variation tendencies exist in the embankment; and in the layers with same depth, the change amplitude of temperature in the embankment is larger than that under natural ground surface; the depth of temperature field under natural ground surface affected by atmospheric temperature is 4～6m and the depth of temperature field in the loess embankment affected is more than 10m.