›› 2014, Vol. 299 ›› Issue (2): 389-396.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Model test research on work performance of steel tubular composite pile with shear ring, drilling mud skin and anticorrosion coating

ZHANG Min1, MA Jian-lin1, SU Quan-ke2, WU Wei-sheng3, LIU Kai-rui1   

  1. 1. School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China; 2. Hong Kong-Zhuhai-Macao Bridge Authority, Zhuhai, Guangdong 519015, China; 3. China Communications Construction Cooperation Highway Consultants Co., Ltd., Beijing 100088, China
  • Received:2012-12-04 Online:2014-02-11 Published:2014-02-18

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Abstract: To investigate the effects of shear ring, drilling mud skin and anticorrosion coating on performances of steel tubular composite (STC) piles, five model tests with different combinations of shear ring, drilling mud skin and anticorrosion coating are conducted; two of them are with shear ring, relying on the construction of the Hong Kong-Zhuhai-Macao Bridge. The load-deformation curves and deformations of cross-section, steel tube and shear ring have been compared and analyzed. The results obtained from the tests show that the bond strength of STC pile is reduced by drilling mud skin and anticorrosion coating, while the performances of steel tube are improved by shear ring. The cross-section deformation of pile shows "inverted v" or "m" type; it no longer meets section deformation assumption of classical mechanics. The disadvantage effects of drilling mud skin and anticorrosion coating can be completely overcome by the shear ring, when its spacing is less than 2D (D is pile’s diameter). Based on the test results, the stiffness calculation of STC pile has been discussed and the stiffness calculation formula in elastic stage has been given. The stiffness of STC pile is reduced by drilling mud skin with thickness of 0.1 mm and anticorrosion coating, which is improved by shear ring. The paper will provide references for STC pile’s design.

Key words: model test, steel tubular composite pile, shear ring, drilling mud skin, anticorrosion coating, working performance

CLC Number: 

  • TU 473.1
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