土工基础

›› 2016, Vol. 30 ›› Issue (6): 726-729.

• 工程实录 • 上一篇    下一篇

冻融循环作用对粉质粘土回弹模量影响的试验研究

刘  方，冉武平   

  1. （新疆大学 建筑工程学院，乌鲁木齐 830047）
  • 收稿日期:2015-12-08 修回日期:2016-01-20 出版日期:2016-12-20 发布日期:2016-12-22
  • 作者简介:刘方（1989-），男，硕士研究生，主要研究方向为防震减灾与防护工程。
  • 基金资助:

    国家自然科学基金（51368058）：道路与交通工程教育部重点实验室开放课题（K201309）

Impact of Freeze-Thaw Cycles on the Resilient Modulus of Silty Clay Soils

LIU Fang, RAN Wuping   

  1. (College of Civil Engineering and Architecture, Xinjiang University, Urumqi, 830047)
  • Received:2015-12-08 Revised:2016-01-20 Online:2016-12-20 Published:2016-12-22

摘要： 以乌鲁木齐市粉质粘土为研究对象，研究了含水率、压实度和冻融循环对回弹模量的影响。在大量实验的基础上，得出了相关土类基本参数、相关曲线、试件制备数据。最后对所得回弹模量试验结果采用正交试验分析方法进行了显著性分析。结果显示：不同类型的土样在历经3～4次循环后，其回弹模量值基本全都趋于稳定。含水率、压实度以及冻融循环作用对回弹模量影响程度排序为：含水率> 冻融循环作用>压实度。得出了正交试验方法下的最佳组合状态。

关键词: 粉质粘性土, 含水率, 压实度, 冻融循环, 回弹模量, 正交法, 显著性分析

Abstract: The impact of moisture content, degree of compaction and freezethaw cycles on the resilient modulus of silty clay soils are extensively laboratory studied using silty clay soils from Urumqi. The sample preparation details, basic physical properties and relationship curves are obtained. The significance analysis of the test data were statistically analyzed using orthogonal method. The results indicate that the resilient modulus value of samples with the same soil type tend to be stable after 34 freeze thaw cycles. Among the three factors that might impact the resilient modulus, the sequences are: moisture contents, freezethaw cycles and degree of compaction. The moisture content is the largest impact factor and the degree of compact is the lowest.

Key words: Silty Clays, Moisture Contents, Degree of Compaction, FreezeThaw Cycles, Resilient Modulus, Orthogonal Method, Significance Analysis