›› 2010, Vol. 31 ›› Issue (5): 1559-1563.

• Geotechnical Engineering • Previous Articles     Next Articles

Application of grouted gravel pile in soft subgrade improvement of expressway

WEN Shi-qiang 1, 2, CHEN Yu-min 1, 2, DING Xuan-ming 1, 2, ZUO Wei-long 1, 2   

  1. 1. Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China; 2. Geotechnical Research Institute, Hohai University, Nanjing 210098, China
  • Received:2009-10-21 Online:2010-05-10 Published:2010-05-24

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Abstract:

Grouted gravel pile is a new technique of pile construction, load-bearing characteristics of grouted gravel pile composite foundation is analyzed based on its application to soft subgrade improvement of Ningbo round-city expressway. The settlement and lateral deformations of the subgrade are monitored in-situ; while the pore pressure, earth pressure between piles and pressure on the top of piles are also monitored. The monitor result indicates that: the total settlements are small and soon became stabilization, which is propitious for the construction; stress concentration on the top of piles is evident, which proved the replacement effect of pile is evident; pore pressure decreased soon, which reduced settlement after construction caused by secondary consolidation.

Key words: grouted gravel pile, soft foundation, foundation treatment, monitoring in-situ, complex foundation

CLC Number: 

  • TU 473
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