›› 2012, Vol. 33 ›› Issue (S2): 155-161预钻孔对邻近斜坡沉桩挤土影响分析.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Influence of prebored hole on soil-squeezing displacement for pile sinking adjacent to slope

RAO Ping-ping1, LI Jing-pei2, 3, ZHANG Chang-guang4   

  1. 1. Department of Civil Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China; 2. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China; 3. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China; 4. School of Civil Engineering, Chang'an University, Xi'an 710061, China
  • Received:2012-03-19 Online:2012-11-22 Published:2012-12-11

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Abstract: Prebored hole is an effective construction measure for reducing the squeezing effect of sinking-pile. For the problem of soil squeezing by sinking-pile adjacent to slope, it is assumed that the soil is the linear elastic constitutive model, The process of sinking-pile is simulated by a series of continuous spherical cavity expansion, Based on the mirror image method and present literatures, the soil squeezing displacement expression caused by pile sinking adjacent to slope is deduced which considers the influence of prebored hole. The results show that the soil compacting effects which far away from the hypotenuse free boundary side are not as obvious as the opposite side due to the influence of asymmetrical displacement boundary; the compacting effects become more obvious with the steeper of the hypotenuse free boundary; the influence of inclination boundary to the soil squeezing displacement would be gradually smaller with the increase of free inclination boundary angle; the aperture and hole-depth are important factors for the compacting effects of pile sinking adjacent to slope; combination of the aperture and hole-depth can effectively reduce the compacting effects. The results provide some reference value for engineering design.

Key words: prebored hole, slope, pile-sinking, soil-squeezing displacement, mirror image method

CLC Number: 

  • TU473
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