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冻土路基温度场是决定冻土路基稳定性的关键因素。在多年冻土区修筑道路工程后,由于工程施工的扰动作用,改变了地表与外界的热交换条件,打破了原有的热平衡状态,使冻土路基温度场变化十分复杂。鉴于青藏高原独特的自然地理环境,实测地温及气象资料获取的困难性,通过青藏铁路沿线有限的实测地温资料,建立了砂砾路面下路基水平表面浅层地温与理论太阳直接辐射强度之间简单的近似线性函数关系,并分析讨论了路基边坡表面浅层地温与太阳直接辐射强度之间线性关系较差的原因。
The temperature field of permafrost embankment is the key factor that determines the stability of frozen soil roadbed. After the construction of road works in permafrost regions, the heat exchange conditions between the earth’s surface and the outside world have been changed due to the disturbance of engineering construction, breaking the original heat balance and changing the temperature field of the frozen soil embankment complex. In view of the unique natural geography environment of Qinghai-Tibet Plateau and the difficulty of acquiring geotemperature and meteorological data acquired by acquisition, this paper established the simple geotextile between horizontal surface shallow ground and theoretical direct solar radiation intensity on the gravel road through the limited measured geothermal data along the Qinghai-Tibet Railway And the reason of the linear relationship between the shallow ground temperature and the direct solar radiation intensity on the subgrade slope surface is analyzed and discussed.