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在青藏铁路路基230处断面中随机选取621组土样,并对土样组分进行分析。研究表明,在役青藏铁路多年冻土区和深季节冻土区内填土完全是由粗颗粒填料组成,一般情况下冻胀量很小;根据深季节冻土区基底填料与毛细水上升高度,部分深季节冻土区段路基会出现冻胀,为青藏铁路路基后续维护提供参考。
Six hundred and seventy-two soil samples were randomly selected from 230 sections of the Qinghai-Tibet Railway embankment, and the soil samples were analyzed. The research shows that the fill in the permafrost region and the deep season permafrost area in the active Qinghai-Tibet Railway is entirely composed of coarse-grained packing, and the amount of frost heaving is very small under normal circumstances. According to the increase of the base filler and capillary water height , Some deep season permafrost section of roadbed will appear frost heave, providing reference for the subsequent maintenance of Qinghai-Tibet railway roadbed.