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试验结果表明,用经过数字化改造后的地震仪测出的路心融化深度,与钻孔测温确定的融化深度相比,其解释误差小于7％。路基和涵洞横剖面的探测结果能反映出融化层变化的主要趋势。不同路堤高度的路基形成的融化横剖面均呈下凹形,而涵洞下形成的融化横剖面则是涵洞中心的融化深度小于两端洞口处的融化深度。因此,地震折射法将为多年冻土地区路基的修筑和稳定性研究提供一种简捷、可靠的探测手段。
The experimental results show that the melting depth of the road center measured by digitally modified seismometers is less than 7% compared to the depth of melting determined by borehole temperature measurement. The detection results of subgrade and culvert cross section can reflect the main trend of melting layer change. The melting cross-section formed by embankment with different embankment height is concave, while the melting cross-section formed by culvert is the thawing depth of the center of the culvert is less than the melting depth of the two ends of the hole. Therefore, the seismic refraction method will provide a simple and reliable method for the research on the construction and stability of subgrade in permafrost regions.