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冰川冻土  2015 

高速铁路路基填料冻胀试验研究

DOI: 10.7522/j.issn.1000-0240.2015.0050, PP. 440-445

Keywords: 路基冻胀,季节冻土,高速铁路,路基填料

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Abstract:

路基冻胀是季节冻土区修建高速铁路必须面对的关键性技术难题.国内外针对路基填料的冻胀机理和特性进行了很多研究,但很少涉及路基填料的渗透性问题.通过室内试验研究了细颗粒含量对路基填料含水量和冻胀率的影响,通过现场试验研究了路基填料的渗透性能,选取哈齐客专某试验段路基进行冻胀监测,验证了防冻层填料的导水特征及其防冻胀性能.结果表明采用填料防冻的技术路线是可行的,通过合理控制填料组分、级配、细颗粒含量等设计参数,严格把控施工质量,路基填料能够满足高速铁路路基防冻胀要求.

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