›› 2015, Vol. 36 ›› Issue (S2): 357-364.doi: 10.16285/j.rsm.2015.S2.049

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Mechanical response of pile-soil interactions of X-section cast-in-place concrete piles to cross-sectional shape

Ya-ru1, 2, DING Xuan-ming3, LIU Han-long2, 3, LIU Yi4   

  1. 1. State Key Laboratory of Disaster Prevention & Mitigation of Explosion & Impact, PLA University of Science and Technology, Nanjing, Jiangsu 210007, China; 2. Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University，Nanjing, Jiangsu 210098, China; 3. College of Civil Engineering, Chongqing University, Chongqing 400045, China; 4. Engineer Academy of People’s Liberation Army, Department of Road and Bridge, Xuzhou, Jiangsu 221004, China
  • Received:2015-03-18 Online:2015-08-31 Published:2018-06-14

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Abstract: The X-section cast-in-place concrete pile (XCC pile) is a new shaped pile. The pile-soil interactions are influenced by the cross-sectional geometry. The load transfer mechanism of the XCC pile dependent on the cross-sectional geometry has been derived by means of equilibrium analysis. However, the mechanical response of the vertical shearing coefficient, governing the pile-soil interactions, for the cross-sectional geometry have not been fully understood. This paper represents the effects of the three geometrical parameters (the diameter of the surrounding circle R, the distance between two adjacent cutting circulars 2a and the central angle of the cutting circle ?X) of the X-shaped cross-section on the vertical shearing coefficient. Comparative analyses between the XCC pile and circular pile of the same cross-sectional area are carried out. It is found that the pile-soil interactions vary with the changes of the geometrical parameters. Influenced by the cross-sectional area, the pile parameter and the vertical sharing coefficient, the axial force increases with the increasing of R and ?x, but decreases with the increasing of 2a. In addition, the axial force of XCC piles is always smaller than that of circular piles of the same cross-sectional area.

Key words: X-section cast-in-place concrete pile(XCC pile), cross-sectional geometry, pile-soil interaction, vertical shearing coefficient

CLC Number: 

  • TU 473
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