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Volume 34 Issue 7
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GAO Guang-yun, YANG Cheng-bin, GAO Meng, ZHANG Jing. Influences of bearing stratum on vertical bearing behaviors of large diameter cast-in-place belled piles[J]. Chinese Journal of Geotechnical Engineering, 2012, 34(7): 1184-1191.
Citation: GAO Guang-yun, YANG Cheng-bin, GAO Meng, ZHANG Jing. Influences of bearing stratum on vertical bearing behaviors of large diameter cast-in-place belled piles[J]. Chinese Journal of Geotechnical Engineering, 2012, 34(7): 1184-1191.
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Influences of bearing stratum on vertical bearing behaviors of large diameter cast-in-place belled piles

  • (1. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China; 2. Institute of Architectural Design, Hefei University of Technology, Hefei 230009, China; 3. Institute of Civil Engineering and Architecture, Shandong University of Science and Technology, Qingdao 266510, China)

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  • Received Date: July 17, 2011
  • Published Date: July 24, 2012
    Graphical Abstract
    • Abstract
  • The main vertical deformation of large diameter cast-in-place belled piles is the compressive one of end-bearing stratum. So the properties of the end-bearing stratum have a great effect on the vertical bearing behavior of the large diameter belled piles. In order to analyze the effectiveness of the bearing stratum on the vertical bearing behavior of a belled pile, three-dimensional non-linear finite-difference numerical models are established by means of the finite-difference program. It is found that the vertical bearing capacity of a large diameter belled pile increases with the increment of the thickness of the bearing stratum. Both the bearing capacity and the tip resistance are notably affected when the thickness variation of the bearing stratum is on the small side. When the ratio of the modulus between the shaft stratum and the bearing stratum is 0.2, the ultimate bearing capacity of the large diameter belled pile is greatly affected as the variation of the tip embedded depth of the pile when the thickness of the bearing stratum is on the small side. With the same thickness of the bearing stratum, the bearing capacity of the large diameter belled pile is greatly affected as the variation of the modulus of the shaft stratum. The greater the modulus of the bearing stratum is, the greater the bearing capacity is. The bearing capacity of the large diameter belled pile is greatly affected with the variation of the modulus of the bearing substratum.
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    • References (18)
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