碎块石护坡在寒区道路工程中的应用

基于室内实验结果，并结合风火山地区地温资料以及风火山实验场现场观测资料，针对抛石护坡对公路铁路沿线路基底下的多年冻土的保护作用以及对多年冻土上限的抬升效果进行对比分析，证实了抛石护坡措施的优越性和可行性．抛石护坡措施兼顾了调控对流和调控传导两方面，是一种典型的主动积极调控地温、保护冻土的措施；它具有热二极管功能，使得热能单向排出，从而使得冻土上限得以较大幅度的抬升，对保证道路安全与畅通起着至关重要的作用。

Application of Riprap Slope Protection to Roadway Engineering in Permafrost Regions

From a laboratory-modeling test, combined with the air temperature and permafrost temperature data of a field test roadbed in Fenghuoshan, the advantage of riprap slope protection for rising permafrost table along a road or a railway in permafrost regions is shown. The superiority and feasibility of the riprap lope protection were confirmed. From the test results, it is found that riprap has an obvious function on permafrost table, and the change of permafrost table is positively related to air temperature. With climate warming, permafrost table will descend step by step, but at the same temperature, to add riprap can obviously uplift permafrost table. Thus, it is suggested to use riprap slope protection in the base of a slope. The riprap slope protection is a measure of actively controlling ground temperature, adjusting heat convection and controlling heat conduction. Riprap acts as a thermo-diode, transferring heat in one-way, largely lifting permafrost table. Riprap slope protection is very important for a roadway to operate in safety without block.