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Vertical Uplift Capacity Characteristics and Influence Factor Analysis of Cast-in-situ X-section Reinforced Concrete Pile Group(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2012年03期
Page:
49-54
Research Field:
Publishing date:

Info

Title:
Vertical Uplift Capacity Characteristics and Influence Factor Analysis of Cast-in-situ X-section Reinforced Concrete Pile Group
Author(s):
KONG Gang-qiang1; 2;  DING Xuan-ming1; 2;  CHEN Yu-min1; 2;  YANG Gui1; 2
1. Key Laboratory of Geomechanics and Embankment Engineering, Ministry of Education, Hohai University, Nanjing 210098, Jiangsu, China; 2. School of Civil and Transportation Engineering, Hohai University, Nanjing 210098, Jiangsu, China
Keywords:
soft soil foundation;  cast-in-situ XCC pile;  uplift bearing capacity;  pile group;  axial force;  fraction coefficient
PACS:
TU473
DOI:
-
Abstract:
Based on Nanjing Sewage Treatment Plant soft ground improvement engineering, field tests of X-section cast-in-situ reinforced concrete pile(referred to as XCC pile)under vertical uplift bearing capacity were carried out, in which the relation curves of load-displacement were measured. Numerical models for XCC single pile and pile group under uplift load were built by using FLAC3D software. The simulation result was compared with single pile field test result. Comparing analysis with the bearing capacity of circular piles under uplift load was carried out. Then, the mechanical properties of XCC pile group which were influenced by pile length, pile-soil fraction coefficient and pile position were analyzed and discussed. The study results show that the vertical uplift bearing capacity of XCC pile is relatively equals to that of circular pile with the same out-diameters, nearly 17.4% larger than that of circular pile with the same concrete volumes.

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Last Update: 2012-09-20