根据国内多年冻土地区的青藏公路、东北铁路的运营调查以及国外资料介绍,对多年冻土地区修筑的路基来说,最多而且最危险的是路基在夏季不断地发生融化下沉和边坡滑塌等现象,影响地基的稳定。为此,必须将路基基底与边坡上的人为上限控制在指定的深度范围内。例如,对路堑可回填一定厚度的土石,对路堤可由填筑一定的高度来保证。为了寻求路堑换填深度和路堤最小高度,国内外广大冻土工作者进行了大量的 According to the survey of the Qinghai-Tibet Highway in the permafrost region, the operation of the Northeast Railway and the introduction of foreign information, the most and most dangerous subgrade in the permafrost region is the steady subsidence and slope slip Collapse and other phenomena, affecting the stability of the foundation. For this reason, the artificial ceiling on the subgrade and slope must be controlled within the specified depth range. For example, the cut can be backfilled with a certain thickness of rock, embankment can be filled by a certain height to ensure. In order to seek the depth of cuttings replacement and the minimum embankment height, a large amount of