›› 2012, Vol. 33 ›› Issue (S2): 219-223.

• Geotechnical Engineering • Previous Articles     Next Articles

Field test research on squeezing effects of X-section cast-in-place concrete pile

LIU Han-long1, 2, JIN Hui1, 2, DING Xuan-ming1, 2, LI Jian3   

  1. 1. Key Laboratory of Geomechanics and Embankment Engineering of Ministry of Education, Hohai University, Nanjing 210098, China; 2. Geotechnical Research Institute，Hohai University, Nanjing 210098, China; 3. Jiangsu Provincial Communications Planning and Design Institute Co.,Ltd.,Nanjing 210000, China
  • Received:2011-10-13 Online:2012-11-22 Published:2012-12-11

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Abstract: Squeezing effects of different piles are hot issues and important problems in engineering design and constructions. Based on the Fourth Yangtze River Bridge?s north-line soft soil treatment engineering at Nanjing, the squeezing effects of X-section cast-in-place concrete pile (referred to as XCC pile) were studied. The influence of pile construction on pore water pressure changes, earth pressure and lateral displacement are observed by pre-laying piezometers, earth pressure cells and inclinometers, respectively. Instruments are embedded at different directions and different depths. Through analyzing the data from field tests, the squeezing effects of XCC pile are obtained. The results show that the maximum horizontal displacement occurs at the top of the piles; and these displacements can be neglected when the distance exceeds five times of equivalent pile diameter. It is also shown that crowded soil pressure and pore-water pressure decreased with the increasing of center distance; besides, pressure of sharp corner is larger than that of concavity. The data from field tests provide other engineers with reliable evidences.

Key words: X-section cast-in-place concrete pile, squeezing effects, lateral displacement, soft soil ground, field test

CLC Number: 

  • TU 443
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