J4 ›› 2011, Vol. 41 ›› Issue (4): 1104-1109.

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Quantitative Research on Microstructure Features of Dredger Fill Under Seepage Flow

NIU Cen-cen1| WANG Qing1, YUAN Xiao-qing1,YANG Jing2, SONG Jing1,WANG Ji-liang2   

  1. 1. College of Construction Engineering, Jilin University, Changchun130026, China;
    2. Three Gorges Geotechnical Consultants Co., Ltd, Wuhan430074,China
  • Received:2010-10-15 Online:2011-07-26 Published:2011-07-26

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Abstract:

More and more engineering geological characters of solidified dredger fill are concerned due to the faster increase of number of reclamation engineering. It has been studied that the engineering behavior of dredger fill is mainly influenced by the material composition and microstructure, within which, the latter is indispensable but seldom involved. Taking dredger fill in Tianjin as study sample, indoor sedimentation test in the effect of seepage is performed along with quantificational analysis of microstructure of soil using image processing technology. And then, the changing of evaluation indicators, such as the size of structure element and pore, abundance, and directional frequency are discussed. The result indicates that, with the increase of seepage pressure, the dispersed structural elements of soil become agglomerated elements displaying a variety of oblate but without directing property. Simultaneously, the pores in the soil are diminished and compacted to be globoid ones after losing balance.

Key words: dredger fill, seepage flow, microstructure, quantitative analysis

CLC Number: 

  • P642.13
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