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冰川冻土  2014 

高压条件下土的冻融试验装置研制及应用

DOI: 10.7522/j.issn.1000-0240.2014.0179, PP. 1496-1501

Keywords: 冻土,高压条件,冻融试验,水分迁移

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Abstract:

深部土体冻融后的物理力学性质对深部人工冻结工程意义重大.针对该问题,在以往土的冻融试验装置的基础上,设计出适用于高压条件下土的室内冻融试验装置,并给出了高压条件下土的冻融试验方法.基于该装置,对有压条件下兰州黄土在不同冷端温度下的单向冻结特征进行了试验研究.结果表明无压单向冻结过程中土的变形以冻胀为主,而高压情况下则主要表现为压缩变形.在有压单向冻结过程中,试样内部仍然存在着明显的水分重分布过程.试验分析表明,该试验装置能够为高压条件下土的冻结特征及冻融作用后土的物理力学性质研究提供技术支持.

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