Journal of Jilin University(Earth Science Edition) ›› 2018, Vol. 48 ›› Issue (3): 799-804.doi: 10.13278/j.cnki.jjuese.20170298

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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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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.

CLC Number: 

  • TU447
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