杨若辰,张吾渝,孙晓辉,唐雄宇,刘成奎

• 1:青海大学土木工程学院
• 2:青海省建筑节能材料与工程安全重点实验室
• 3:深圳大学土木与交通工程学院
• 4:青海省建筑建材科学研究院有限责任公司

摘要(Abstract)：

路基工程中，土体中水分侵入与聚集是工程事故产生的重要原因。为主动移除土体中的水分，提出了一种由PVA(polyvinyl alcohol,聚乙烯醇)和具有沟槽的涤纶纤维联合组成的吸水土工毯，其可利用土体内外蒸汽压差通过PVA材料的吸水性及内部纤维的毛细作用主动迁移土体中的水分。通过在温湿度控制条件下室内土柱试验，对比了涤纶纤维与吸水土工毯对路基盐渍土水盐移除效果，并研究了盐渍土初始含水率及环境温湿度对吸水土工毯水盐移除的影响。结果表明，吸水土工毯在非饱和条件下可有效移除路基盐渍土中的水分及盐分，在涤纶纤维基础上进一步提升了水盐移除效率；吸水土工毯水盐移除效果及其有效作用范围随试样含水率下降呈现降低趋势，在试样含水率接近土体最优含水率时，吸水土工毯仍具有一定功效；吸水土工毯水盐移除效率与环境温湿度条件密切相关，外界环境相对湿度是影响吸水土工毯作用效果的关键因素。

关键词(KeyWords)： 吸水土工材料;PVA材料;芯吸纤维;水盐移除;土柱试验

Abstract:

Keywords:

基金项目(Foundation): 青海省科技计划项目(2020-ZJ-738);; 国家自然科学基金项目(52168054,52179108);; 青海省高原绿色建筑与生态社区重点实验室开放基金计划项目(KLKF-2021-007)

作者(Author): 杨若辰,张吾渝,孙晓辉,唐雄宇,刘成奎

DOI: 10.13928/j.cnki.wrahe.2022.12.006

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