›› 2009, Vol. 30 ›› Issue (2): 297-304.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Field experimental study of mechanical performance of Y-shaped vibro-pile reinforced embankments

LIU Han-long 1, 2, WANG Xin-quan 1, 2, CHEN Yong-hui 1, 2, LU Jian-hua3   

  1. 1. Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China; 2. Research Institute of Geotechnical Engineering, Hohai University, Nanjing 21098, China; 3. Zhejiang Shanshui Building Co. Ltd, Hangzhou 310016, China
  • Received:2007-05-15 Online:2009-02-10 Published:2011-01-27

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Abstract:

Based on the soft ground improvement project at Jiaxing section of Shen-Jia-Hu-Hang Expressway using Y-shaped vibro-pile, field tests on reinforced embankment with Y-shaped vibro-pile were performed to study stress distribution at road embankment surface, and above and under pile caps under road embankment load; so that the stress distribution and change rules were obtained. A series of stress differences were compared at specific positions, such as different points at soil surface among pile caps, above and under pile caps, soil surface under pile caps and among pile caps, on pile caps and pile heads. The changing tendency and rule of pile-soil stress ratio and load distribution ratio under road embankment load were analyzed. The adjusting process of soil stress and pile-soil stress ratio after filling was analyzed during special time period. The adjusting rule of pile-soil stress ratio and load distribution ratio during preloading period were also analyzed based on the monitoring data during preloading period.

Key words: Y-shaped vibro-pile, reinforced embankments, stress distribution, pile-soil stress ratio, load sharing ratio

CLC Number: 

  • TU 472
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