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研究目的:通过分析研究片石通风路基、热棒路基、通风管路基施工技术的工作原理、施工工艺和方法、主要质量保证措施和实际应用效果,总结青藏铁路多年冻土路堤施工技术,为高原多年冻土路堤施工提供技术支持。研究结论:根据分析确定不同冻土施工技术的适用范围,灵活选择冻土施工技术。路基面过宽、暖季过长的冻土地段不宜选择热棒路基;通风管路基与风向密切相关,目前我们很难把握风向,建议少采用通风管路基;片石通风路基要注意选好石材,防止地表水进入路堤;在高路堤地段,建议采用以桥代路方式通过。
The purpose of this study is to summarize the construction technology of the permafrost embankment of the Qinghai-Tibet Railway for many years by analyzing the working principle, construction technology and method, main quality assurance measures and practical application effects of the construction technology of the rock-stone ventilation subgrade, hot rod subgrade and ventilation pipe subgrade, Frozen soil embankment construction to provide technical support. Research conclusions: Based on the analysis to determine the applicable scope of different frozen soil construction technology, flexible selection of frozen soil construction technology. Roadbed is too wide, the hot season is too long frozen land lots should not be selected; base of the ventilation pipe and the wind direction is closely related to the current we are difficult to grasp the wind direction, it is recommended to use less ventilation pipe foundation; Prevent surface water from entering the embankment; in the high embankment section, it is recommended to adopt the way of bridge passage.