吉林大学学报(地球科学版) ›› 2018, Vol. 48 ›› Issue (3): 799-804.doi: 10.13278/j.cnki.jjuese.20170298

• 地质工程与环境工程 • 上一篇    下一篇

伊通软土的次固结特性

王常明, 张索煜, 李硕   

  1. 吉林大学建设工程学院, 长春 130026
  • 收稿日期:2017-11-09 出版日期:2018-05-26 发布日期:2018-05-26
  • 作者简介:王常明(1966-),男,教授,博士生导师,主要从事岩土力学方面的教学和研究工作,E-mail:wangcm@jlu.edu.cn
  • 基金资助:
    国家自然科学基金项目（41572257）

Secondary Consolidation Characteristics of Yitong Soft Soil

Wang Changming, Zhang Suoyu, Li Shuo   

  1. College of Construction Engineering, Jilin University, Changchun 130026, China
  • Received:2017-11-09 Online:2018-05-26 Published:2018-05-26
  • Supported by:
    Supported by National Natural Science Foundation of China (41572257)

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摘要： 为了合理计算软土地基的沉降量，对软土的次固结特性及影响因素进行研究。采用分级加荷的方法，对伊通软土进行了压缩固结试验。结果表明：伊通软土的应变速率和时间双对数曲线具有相关性；随着固结压力的增大，次固结系数Ca先迅速增大至最小值的3倍，达到峰值后逐步减小至峰值的15%，达到稳定；次固结系数Ca与压缩指数Cc具有一定的线性相关性，Ca/Cc值在0.030~0.043之间；次固结系数Ca随时间的增加呈对数下降趋势，随着时间的增长，Ca下降，最终其最小值达到最大值的72.3%。本文的研究结果可以对伊通地区软土地基的变形与沉降预测提供一定的参考。

关键词: 次固结系数, 伊通, 软土, 固结, 线性相关

Abstract: In order to calculate settlement of soft ground reasonably, the paper focuses on the secondary consolidation characteristics and influencing factors of soft soil. In this study, a series of consolidation and compression tests were conducted on the Yitong soft soil. The characteristics of consolidation and secondary consolidation of Yitong soft soil were analyzed with a graded loading method. The research results showed that there is a good linear correlation existed between the strain rate and time in double logarithmic coordinates:With the increase of load p, the secondary consolidation coefficient Ca increased rapidly, and then decreased gradually to a stable value; There is a linear correlation between the secondary consolidation coefficient Ca and the compression index Cc, and Ca decreased logarithmically with time. The ratio of Ca/Cc is between 0.030 and 0.043. The minimum of Ca is about 72.3% of the maximum. These data provide some references to deformation prediction of soft ground in Yitong area.

Key words: secondary consolidation coefficient soft soil, Yitong soft soil, consolidation, linear correlation.

中图分类号: 

  • TU447
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