›› 2010, Vol. 31 ›› Issue (S1): 255-260.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Discussion of pile strength testing methods and causes analysis of strength difference of T-shaped bidirectional deep mixing column

HE Li-hong1,LI Yan 2, 3,ZHANG Ni-na1,QIN Ya-qiong1   

  1. 1. Wuhan Municipal Engineering Design and Research Institute Co. Ltd., Wuhan 430015, China; 2. Wuhan New Area Construction and Development Investment Co. Ltd., Wuhan 430023, China; 3. School of Urban Design, Wuhan University, Wuhan 430072, China
  • Received:2010-03-02 Online:2010-08-10 Published:2010-09-09

Abstract:

The formation and characteristics of T-shaped bidirectional deep mixing column were described. Through huge amounts of standard penetration tests(SPT) on pile shaft and indoor unconfined compression tests, correlations between SPT values and the strength of unconfined compression tests were established, and the correlations between SPT values and the depth of piles were also discussed. Testing method of pile strength and strengths, difference along the pile depth were elaborately analyzed. It was preliminary determined to use the strength of pile to substitute the results of unconfined compression tests in Wuhan New District pile strength investigation project. It is suggested that the weighted average value of pile strengths should be adopted for pile designing and strength testing.

Key words: T-shaped bidirectional deep mixing column, strength, analysis, detection

CLC Number: 

  • TU 473
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