Application of Thermal Probe to Enhance Thermal Stability of Roadbed in Plateau Permafrost Areas

As a high-effective heat conduction set, thermal probe can be used for enhanced thermal stability of building basement in permafrost .In this paper, some basic circumstances of using thermal probe in test roadbed in the Tibetan Plateau permafrost regions were introduced. Working state and effective radius of them were analyzed. Ground temperature field of roadbed itself and its bed were comparatively analyzed for various climate conditions. Since the end of 2001, cold reserve in basement of a roadbed has increased in evidence. It is effective and successful using thermal probe to protect frozen soil and enhance its thermal stability .