›› 2013, Vol. 34 ›› Issue (S1): 192-196.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Centrifugal model test of pile-plank subgrade in soft ground

HUANG Long，WANG Bing-long，ZHOU Shun-hua   

  1. Key Laboratory of Road and Traffic Engineering of Ministry of Education, Tongji University, Shanghai 200092, China
  • Received:2012-07-26 Online:2013-08-30 Published:2014-06-09

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Abstract: To analyse the settlement characteristics of pile-plank structure in soft soil subgrade, the centrifugal model test is used to imitate the pile-plank subgrade with different preloading times about six moth and twen-four month. It is shows that the settlements of pile-plank subgrade mainly happen during construction in which the proportion of settlement will exceed 80% when the preloading time is more than 6 months. Whether the settlement of pile-plank subgrade will rebound or not during unloading time is related to the soil properties and preloading time. Overload preloading can significantly reduce post-construction settlement which can be reduced 70% for twen-four month to 6 nonth of preloading time. During construction of pile-plank structure subgrade, pile foundation exists negative friction and neutral position change is a dynamic process, ratio pile length between 0.47~0.7.

Key words: pile-plank, centrifugal model test, post-construction settlement, negative friction

CLC Number: 

  • TU 473
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